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realazthat/index.js

Last active September 14, 2016 18:47
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demo for substack's implicit function rendering
Raw
index.js
let regl = require('regl')();
let mat4 = require('gl-mat4');
var build = require('implicit-mesh')
function f(x,y,z) {
return Math.sqrt(x*x + y*y + z*z);
}
let vert = ```
attribute vec3 a_position;
attribute vec3 a_normal;
uniform mat4 u_projection;
uniform mat4 u_view;
uniform mat4 u_model;
varying vec3 v_normal;
void main() {
v_normal = a_normal;
gl_Position = u_projection*u_view*u_model*vec4(a_position,1);
}
```;
let frag = ```
uniform vec3 u_light_pos;
uniform vec4 u_light_color;
uniform vec3 u_ambient_color;
varying vec3 v_normal;
void main() {
vec3 light_dir = u_light_pos - position;
vec3 color = dot(v_normal, light_dir);
color = vec3(1) - (vec3(1) - color) * (vec3(1) - u_ambient_color);
gl_FragColor = color;
}
```;
let mesh = build(64, f);
var angleNormals = require('angle-normals');
var normals = angleNormals(mesh.cells, mesh.positions)
let cmd = regl({
vert,
frag,
attributes: {
a_position: mesh.positions,
a_normals: normals
},
elements: mesh.cells,
uniforms: {
u_view: regl.prop('u_view'),
u_projection: regl.prop('u_projection'),
u_model: regl.prop('u_model')
},
framebuffer: regl.prop('framebuffer')
});
let camera = {
fov: {
upDegrees: 45,
downDegrees: 45,
leftDegrees: 45,
rightDegrees: 45
},
near: 0.001,
far: 10.0,
eye: vec3.fromValues(0,0,0),
up: vec3.fromValues(0,1,0),
focus: vec3.fromValues(0,0,1),
matrices: {
projection: mat4.identity(),
view: mat4.identity(),
},
update: function update() {
this.matrices.projection =
mat4.perspectiveFromFieldOfView(this.matrices.projection, this.fov, this.near, this.far);
this.matrices.view = mat4.lookAt(this.matrices.view, this.eye, this.focus, this.up);
}
}
let light = {
pos: vec3.fromValues(-1,2,-2),
color: vec3.fromValues(0.5,0.5, 1.0)
};
let ambient = vec3.fromValues(.2,.2,.2);
let meshMat = mat4.identity();
regl.frame(function(){
regl.clear([0,0,0,1]);
camera.update();
cmd({
u_view: camera.matrices.view,
u_projection: camera.matrices.projection,
u_model: meshMat,
u_light_pos: light.pos,
u_light_color: light.color,
u_ambient: ambient
});
});
Raw
minified.js
setTimeout(function(){
;require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var GL_FLOAT = 5126
function AttributeRecord () {
this.state = 0
this.x = 0.0
this.y = 0.0
this.z = 0.0
this.w = 0.0
this.buffer = null
this.size = 0
this.normalized = false
this.type = GL_FLOAT
this.offset = 0
this.stride = 0
this.divisor = 0
}
module.exports = function wrapAttributeState (
gl,
extensions,
limits,
bufferState,
stringStore) {
var NUM_ATTRIBUTES = limits.maxAttributes
var attributeBindings = new Array(NUM_ATTRIBUTES)
for (var i = 0; i < NUM_ATTRIBUTES; ++i) {
attributeBindings[i] = new AttributeRecord()
}
return {
Record: AttributeRecord,
scope: {},
state: attributeBindings
}
}
},{}],2:[function(require,module,exports){
var check = require('./util/check')
var isTypedArray = require('./util/is-typed-array')
var isNDArrayLike = require('./util/is-ndarray')
var values = require('./util/values')
var pool = require('./util/pool')
var arrayTypes = require('./constants/arraytypes.json')
var bufferTypes = require('./constants/dtypes.json')
var usageTypes = require('./constants/usage.json')
var GL_STATIC_DRAW = 0x88E4
var GL_STREAM_DRAW = 0x88E0
var GL_UNSIGNED_BYTE = 5121
var GL_FLOAT = 5126
var DTYPES_SIZES = []
DTYPES_SIZES[5120] = 1 // int8
DTYPES_SIZES[5122] = 2 // int16
DTYPES_SIZES[5124] = 4 // int32
DTYPES_SIZES[5121] = 1 // uint8
DTYPES_SIZES[5123] = 2 // uint16
DTYPES_SIZES[5125] = 4 // uint32
DTYPES_SIZES[5126] = 4 // float32
function typedArrayCode (data) {
return arrayTypes[Object.prototype.toString.call(data)] | 0
}
function copyArray (out, inp) {
for (var i = 0; i < inp.length; ++i) {
out[i] = inp[i]
}
}
function transpose (
result, data, shapeX, shapeY, strideX, strideY, offset) {
var ptr = 0
for (var i = 0; i < shapeX; ++i) {
for (var j = 0; j < shapeY; ++j) {
result[ptr++] = data[strideX * i + strideY * j + offset]
}
}
}
function flatten (result, data, dimension) {
var ptr = 0
for (var i = 0; i < data.length; ++i) {
var v = data[i]
for (var j = 0; j < dimension; ++j) {
result[ptr++] = v[j]
}
}
}
module.exports = function wrapBufferState (gl, stats, config) {
var bufferCount = 0
var bufferSet = {}
function REGLBuffer (type) {
this.id = bufferCount++
this.buffer = gl.createBuffer()
this.type = type
this.usage = GL_STATIC_DRAW
this.byteLength = 0
this.dimension = 1
this.dtype = GL_UNSIGNED_BYTE
this.persistentData = null
if (config.profile) {
this.stats = {size: 0}
}
}
REGLBuffer.prototype.bind = function () {
gl.bindBuffer(this.type, this.buffer)
}
REGLBuffer.prototype.destroy = function () {
destroy(this)
}
var streamPool = []
function createStream (type, data) {
var buffer = streamPool.pop()
if (!buffer) {
buffer = new REGLBuffer(type)
}
buffer.bind()
initBufferFromData(buffer, data, GL_STREAM_DRAW, 0, 1, false)
return buffer
}
function destroyStream (stream) {
streamPool.push(stream)
}
function initBufferFromTypedArray (buffer, data, usage) {
buffer.byteLength = data.byteLength
gl.bufferData(buffer.type, data, usage)
}
function initBufferFromData (buffer, data, usage, dtype, dimension, persist) {
buffer.usage = usage
if (Array.isArray(data)) {
buffer.dtype = dtype || GL_FLOAT
if (data.length > 0) {
var flatData
if (Array.isArray(data[0])) {
buffer.dimension = data[0].length
flatData = pool.allocType(
buffer.dtype,
data.length * buffer.dimension)
flatten(flatData, data, buffer.dimension)
initBufferFromTypedArray(buffer, flatData, usage)
if (persist) {
buffer.persistentData = flatData
} else {
pool.freeType(flatData)
}
} else if (typeof data[0] === 'number') {
buffer.dimension = dimension
var typedData = pool.allocType(buffer.dtype, data.length)
copyArray(typedData, data)
initBufferFromTypedArray(buffer, typedData, usage)
if (persist) {
buffer.persistentData = typedData
} else {
pool.freeType(typedData)
}
} else if (isTypedArray(data[0])) {
buffer.dimension = data[0].length
buffer.dtype = dtype || typedArrayCode(data[0]) || GL_FLOAT
flatData = pool.allocType(
buffer.dtype,
data.length * buffer.dimension)
flatten(flatData, data, buffer.dimension)
initBufferFromTypedArray(buffer, flatData, usage)
if (persist) {
buffer.persistentData = flatData
} else {
pool.freeType(flatData)
}
} else {
check.raise('invalid buffer data')
}
}
} else if (isTypedArray(data)) {
buffer.dtype = dtype || typedArrayCode(data)
buffer.dimension = dimension
initBufferFromTypedArray(buffer, data, usage)
if (persist) {
buffer.persistentData = new Uint8Array(new Uint8Array(data.buffer))
}
} else if (isNDArrayLike(data)) {
var shape = data.shape
var stride = data.stride
var offset = data.offset
var shapeX = 0
var shapeY = 0
var strideX = 0
var strideY = 0
if (shape.length === 1) {
shapeX = shape[0]
shapeY = 1
strideX = stride[0]
strideY = 0
} else if (shape.length === 2) {
shapeX = shape[0]
shapeY = shape[1]
strideX = stride[0]
strideY = stride[1]
} else {
check.raise('invalid shape')
}
buffer.dtype = dtype || typedArrayCode(data.data) || GL_FLOAT
buffer.dimension = shapeY
var transposeData = pool.allocType(buffer.dtype, shapeX * shapeY)
transpose(transposeData,
data.data,
shapeX, shapeY,
strideX, strideY,
offset)
initBufferFromTypedArray(buffer, transposeData, usage)
if (persist) {
buffer.persistentData = transposeData
} else {
pool.freeType(transposeData)
}
} else {
check.raise('invalid buffer data')
}
}
function destroy (buffer) {
stats.bufferCount--
var handle = buffer.buffer
check(handle, 'buffer must not be deleted already')
gl.deleteBuffer(handle)
buffer.buffer = null
delete bufferSet[buffer.id]
}
function createBuffer (options, type, deferInit, persistent) {
stats.bufferCount++
var buffer = new REGLBuffer(type)
bufferSet[buffer.id] = buffer
function reglBuffer (options) {
var usage = GL_STATIC_DRAW
var data = null
var byteLength = 0
var dtype = 0
var dimension = 1
if (Array.isArray(options) ||
isTypedArray(options) ||
isNDArrayLike(options)) {
data = options
} else if (typeof options === 'number') {
byteLength = options | 0
} else if (options) {
check.type(
options, 'object',
'buffer arguments must be an object, a number or an array')
if ('data' in options) {
check(
data === null ||
Array.isArray(data) ||
isTypedArray(data) ||
isNDArrayLike(data),
'invalid data for buffer')
data = options.data
}
if ('usage' in options) {
check.parameter(options.usage, usageTypes, 'invalid buffer usage')
usage = usageTypes[options.usage]
}
if ('type' in options) {
check.parameter(options.type, bufferTypes, 'invalid buffer type')
dtype = bufferTypes[options.type]
}
if ('dimension' in options) {
check.type(options.dimension, 'number', 'invalid dimension')
dimension = options.dimension | 0
}
if ('length' in options) {
check.nni(byteLength, 'buffer length must be a nonnegative integer')
byteLength = options.length | 0
}
}
buffer.bind()
if (!data) {
gl.bufferData(buffer.type, byteLength, usage)
buffer.dtype = dtype || GL_UNSIGNED_BYTE
buffer.usage = usage
buffer.dimension = dimension
buffer.byteLength = byteLength
} else {
initBufferFromData(buffer, data, usage, dtype, dimension, persistent)
}
if (config.profile) {
buffer.stats.size = buffer.byteLength * DTYPES_SIZES[buffer.dtype]
}
return reglBuffer
}
function setSubData (data, offset) {
check(offset + data.byteLength <= buffer.byteLength,
'invalid buffer subdata call, buffer is too small. ' + ' Can\'t write data of size ' + data.byteLength + ' starting from offset ' + offset + ' to a buffer of size ' + buffer.byteLength)
gl.bufferSubData(buffer.type, offset, data)
}
function subdata (data, offset_) {
var offset = (offset_ || 0) | 0
buffer.bind()
if (Array.isArray(data)) {
if (data.length > 0) {
if (typeof data[0] === 'number') {
var converted = pool.allocType(buffer.dtype, data.length)
copyArray(converted, data)
setSubData(converted, offset)
pool.freeType(converted)
} else if (Array.isArray(data[0]) || isTypedArray(data[0])) {
var dimension = data[0].length
var flatData = pool.allocType(buffer.dtype, data.length * dimension)
flatten(flatData, data, dimension)
setSubData(flatData, offset)
pool.freeType(flatData)
} else {
check.raise('invalid buffer data')
}
}
} else if (isTypedArray(data)) {
setSubData(data, offset)
} else if (isNDArrayLike(data)) {
var shape = data.shape
var stride = data.stride
var shapeX = 0
var shapeY = 0
var strideX = 0
var strideY = 0
if (shape.length === 1) {
shapeX = shape[0]
shapeY = 1
strideX = stride[0]
strideY = 0
} else if (shape.length === 2) {
shapeX = shape[0]
shapeY = shape[1]
strideX = stride[0]
strideY = stride[1]
} else {
check.raise('invalid shape')
}
var dtype = Array.isArray(data.data)
? buffer.dtype
: typedArrayCode(data.data)
var transposeData = pool.allocType(dtype, shapeX * shapeY)
transpose(transposeData,
data.data,
shapeX, shapeY,
strideX, strideY,
data.offset)
setSubData(transposeData, offset)
pool.freeType(transposeData)
} else {
check.raise('invalid data for buffer subdata')
}
return reglBuffer
}
if (!deferInit) {
reglBuffer(options)
}
reglBuffer._reglType = 'buffer'
reglBuffer._buffer = buffer
reglBuffer.subdata = subdata
if (config.profile) {
reglBuffer.stats = buffer.stats
}
reglBuffer.destroy = function () { destroy(buffer) }
return reglBuffer
}
function restoreBuffers () {
values(bufferSet).forEach(function (buffer) {
buffer.buffer = gl.createBuffer()
gl.bindBuffer(buffer.type, buffer.buffer)
gl.bufferData(
buffer.type, buffer.persistentData || buffer.byteLength, buffer.usage)
})
}
if (config.profile) {
stats.getTotalBufferSize = function () {
var total = 0
// TODO: Right now, the streams are not part of the total count.
Object.keys(bufferSet).forEach(function (key) {
total += bufferSet[key].stats.size
})
return total
}
}
return {
create: createBuffer,
createStream: createStream,
destroyStream: destroyStream,
clear: function () {
values(bufferSet).forEach(destroy)
streamPool.forEach(destroy)
},
getBuffer: function (wrapper) {
if (wrapper && wrapper._buffer instanceof REGLBuffer) {
return wrapper._buffer
}
return null
},
restore: restoreBuffers,
_initBuffer: initBufferFromData
}
}
},{"./constants/arraytypes.json":3,"./constants/dtypes.json":4,"./constants/usage.json":6,"./util/check":20,"./util/is-ndarray":25,"./util/is-typed-array":26,"./util/pool":28,"./util/values":31}],3:[function(require,module,exports){
module.exports={
"[object Int8Array]": 5120
, "[object Int16Array]": 5122
, "[object Int32Array]": 5124
, "[object Uint8Array]": 5121
, "[object Uint8ClampedArray]": 5121
, "[object Uint16Array]": 5123
, "[object Uint32Array]": 5125
, "[object Float32Array]": 5126
, "[object Float64Array]": 5121
, "[object ArrayBuffer]": 5121
}
},{}],4:[function(require,module,exports){
module.exports={
"int8": 5120
, "int16": 5122
, "int32": 5124
, "uint8": 5121
, "uint16": 5123
, "uint32": 5125
, "float": 5126
, "float32": 5126
}
},{}],5:[function(require,module,exports){
module.exports={
"points": 0,
"point": 0,
"lines": 1,
"line": 1,
"line loop": 2,
"line strip": 3,
"triangles": 4,
"triangle": 4,
"triangle strip": 5,
"triangle fan": 6
}
},{}],6:[function(require,module,exports){
module.exports={
"static": 35044,
"dynamic": 35048,
"stream": 35040
}
},{}],7:[function(require,module,exports){
var check = require('./util/check')
var createEnvironment = require('./util/codegen')
var loop = require('./util/loop')
var isTypedArray = require('./util/is-typed-array')
var isNDArray = require('./util/is-ndarray')
var isArrayLike = require('./util/is-array-like')
var dynamic = require('./dynamic')
var primTypes = require('./constants/primitives.json')
var glTypes = require('./constants/dtypes.json')
// "cute" names for vector components
var CUTE_COMPONENTS = 'xyzw'.split('')
var GL_UNSIGNED_BYTE = 5121
var ATTRIB_STATE_POINTER = 1
var ATTRIB_STATE_CONSTANT = 2
var DYN_FUNC = 0
var DYN_PROP = 1
var DYN_CONTEXT = 2
var DYN_STATE = 3
var DYN_THUNK = 4
var S_DITHER = 'dither'
var S_BLEND_ENABLE = 'blend.enable'
var S_BLEND_COLOR = 'blend.color'
var S_BLEND_EQUATION = 'blend.equation'
var S_BLEND_FUNC = 'blend.func'
var S_DEPTH_ENABLE = 'depth.enable'
var S_DEPTH_FUNC = 'depth.func'
var S_DEPTH_RANGE = 'depth.range'
var S_DEPTH_MASK = 'depth.mask'
var S_COLOR_MASK = 'colorMask'
var S_CULL_ENABLE = 'cull.enable'
var S_CULL_FACE = 'cull.face'
var S_FRONT_FACE = 'frontFace'
var S_LINE_WIDTH = 'lineWidth'
var S_POLYGON_OFFSET_ENABLE = 'polygonOffset.enable'
var S_POLYGON_OFFSET_OFFSET = 'polygonOffset.offset'
var S_SAMPLE_ALPHA = 'sample.alpha'
var S_SAMPLE_ENABLE = 'sample.enable'
var S_SAMPLE_COVERAGE = 'sample.coverage'
var S_STENCIL_ENABLE = 'stencil.enable'
var S_STENCIL_MASK = 'stencil.mask'
var S_STENCIL_FUNC = 'stencil.func'
var S_STENCIL_OPFRONT = 'stencil.opFront'
var S_STENCIL_OPBACK = 'stencil.opBack'
var S_SCISSOR_ENABLE = 'scissor.enable'
var S_SCISSOR_BOX = 'scissor.box'
var S_VIEWPORT = 'viewport'
var S_PROFILE = 'profile'
var S_FRAMEBUFFER = 'framebuffer'
var S_VERT = 'vert'
var S_FRAG = 'frag'
var S_ELEMENTS = 'elements'
var S_PRIMITIVE = 'primitive'
var S_COUNT = 'count'
var S_OFFSET = 'offset'
var S_INSTANCES = 'instances'
var SUFFIX_WIDTH = 'Width'
var SUFFIX_HEIGHT = 'Height'
var S_FRAMEBUFFER_WIDTH = S_FRAMEBUFFER + SUFFIX_WIDTH
var S_FRAMEBUFFER_HEIGHT = S_FRAMEBUFFER + SUFFIX_HEIGHT
var S_VIEWPORT_WIDTH = S_VIEWPORT + SUFFIX_WIDTH
var S_VIEWPORT_HEIGHT = S_VIEWPORT + SUFFIX_HEIGHT
var S_DRAWINGBUFFER = 'drawingBuffer'
var S_DRAWINGBUFFER_WIDTH = S_DRAWINGBUFFER + SUFFIX_WIDTH
var S_DRAWINGBUFFER_HEIGHT = S_DRAWINGBUFFER + SUFFIX_HEIGHT
var NESTED_OPTIONS = [
S_BLEND_FUNC,
S_BLEND_EQUATION,
S_STENCIL_FUNC,
S_STENCIL_OPFRONT,
S_STENCIL_OPBACK,
S_SAMPLE_COVERAGE,
S_VIEWPORT,
S_SCISSOR_BOX,
S_POLYGON_OFFSET_OFFSET
]
var GL_ARRAY_BUFFER = 34962
var GL_ELEMENT_ARRAY_BUFFER = 34963
var GL_FRAGMENT_SHADER = 35632
var GL_VERTEX_SHADER = 35633
var GL_TEXTURE_2D = 0x0DE1
var GL_TEXTURE_CUBE_MAP = 0x8513
var GL_CULL_FACE = 0x0B44
var GL_BLEND = 0x0BE2
var GL_DITHER = 0x0BD0
var GL_STENCIL_TEST = 0x0B90
var GL_DEPTH_TEST = 0x0B71
var GL_SCISSOR_TEST = 0x0C11
var GL_POLYGON_OFFSET_FILL = 0x8037
var GL_SAMPLE_ALPHA_TO_COVERAGE = 0x809E
var GL_SAMPLE_COVERAGE = 0x80A0
var GL_FLOAT = 5126
var GL_FLOAT_VEC2 = 35664
var GL_FLOAT_VEC3 = 35665
var GL_FLOAT_VEC4 = 35666
var GL_INT = 5124
var GL_INT_VEC2 = 35667
var GL_INT_VEC3 = 35668
var GL_INT_VEC4 = 35669
var GL_BOOL = 35670
var GL_BOOL_VEC2 = 35671
var GL_BOOL_VEC3 = 35672
var GL_BOOL_VEC4 = 35673
var GL_FLOAT_MAT2 = 35674
var GL_FLOAT_MAT3 = 35675
var GL_FLOAT_MAT4 = 35676
var GL_SAMPLER_2D = 35678
var GL_SAMPLER_CUBE = 35680
var GL_TRIANGLES = 4
var GL_FRONT = 1028
var GL_BACK = 1029
var GL_CW = 0x0900
var GL_CCW = 0x0901
var GL_MIN_EXT = 0x8007
var GL_MAX_EXT = 0x8008
var GL_ALWAYS = 519
var GL_KEEP = 7680
var GL_ZERO = 0
var GL_ONE = 1
var GL_FUNC_ADD = 0x8006
var GL_LESS = 513
var GL_FRAMEBUFFER = 0x8D40
var GL_COLOR_ATTACHMENT0 = 0x8CE0
var blendFuncs = {
'0': 0,
'1': 1,
'zero': 0,
'one': 1,
'src color': 768,
'one minus src color': 769,
'src alpha': 770,
'one minus src alpha': 771,
'dst color': 774,
'one minus dst color': 775,
'dst alpha': 772,
'one minus dst alpha': 773,
'constant color': 32769,
'one minus constant color': 32770,
'constant alpha': 32771,
'one minus constant alpha': 32772,
'src alpha saturate': 776
}
// There are invalid values for srcRGB and dstRGB. See:
// https://www.khronos.org/registry/webgl/specs/1.0/#6.13
// https://github.com/KhronosGroup/WebGL/blob/0d3201f5f7ec3c0060bc1f04077461541f1987b9/conformance-suites/1.0.3/conformance/misc/webgl-specific.html#L56
var invalidBlendCombinations = [
'constant color, constant alpha',
'one minus constant color, constant alpha',
'constant color, one minus constant alpha',
'one minus constant color, one minus constant alpha',
'constant alpha, constant color',
'constant alpha, one minus constant color',
'one minus constant alpha, constant color',
'one minus constant alpha, one minus constant color'
]
var compareFuncs = {
'never': 512,
'less': 513,
'<': 513,
'equal': 514,
'=': 514,
'==': 514,
'===': 514,
'lequal': 515,
'<=': 515,
'greater': 516,
'>': 516,
'notequal': 517,
'!=': 517,
'!==': 517,
'gequal': 518,
'>=': 518,
'always': 519
}
var stencilOps = {
'0': 0,
'zero': 0,
'keep': 7680,
'replace': 7681,
'increment': 7682,
'decrement': 7683,
'increment wrap': 34055,
'decrement wrap': 34056,
'invert': 5386
}
var shaderType = {
'frag': GL_FRAGMENT_SHADER,
'vert': GL_VERTEX_SHADER
}
var orientationType = {
'cw': GL_CW,
'ccw': GL_CCW
}
function isBufferArgs (x) {
return Array.isArray(x) ||
isTypedArray(x) ||
isNDArray(x)
}
// Make sure viewport is processed first
function sortState (state) {
return state.sort(function (a, b) {
if (a === S_VIEWPORT) {
return -1
} else if (b === S_VIEWPORT) {
return 1
}
return (a < b) ? -1 : 1
})
}
function Declaration (thisDep, contextDep, propDep, append) {
this.thisDep = thisDep
this.contextDep = contextDep
this.propDep = propDep
this.append = append
}
function isStatic (decl) {
return decl && !(decl.thisDep || decl.contextDep || decl.propDep)
}
function createStaticDecl (append) {
return new Declaration(false, false, false, append)
}
function createDynamicDecl (dyn, append) {
var type = dyn.type
if (type === DYN_FUNC) {
var numArgs = dyn.data.length
return new Declaration(
true,
numArgs >= 1,
numArgs >= 2,
append)
} else if (type === DYN_THUNK) {
var data = dyn.data
return new Declaration(
data.thisDep,
data.contextDep,
data.propDep,
append)
} else {
return new Declaration(
type === DYN_STATE,
type === DYN_CONTEXT,
type === DYN_PROP,
append)
}
}
var SCOPE_DECL = new Declaration(false, false, false, function () {})
module.exports = function reglCore (
gl,
stringStore,
extensions,
limits,
bufferState,
elementState,
textureState,
framebufferState,
uniformState,
attributeState,
shaderState,
drawState,
contextState,
timer,
config) {
var AttributeRecord = attributeState.Record
var blendEquations = {
'add': 32774,
'subtract': 32778,
'reverse subtract': 32779
}
if (extensions.ext_blend_minmax) {
blendEquations.min = GL_MIN_EXT
blendEquations.max = GL_MAX_EXT
}
var extInstancing = extensions.angle_instanced_arrays
var extDrawBuffers = extensions.webgl_draw_buffers
// ===================================================
// ===================================================
// WEBGL STATE
// ===================================================
// ===================================================
var currentState = {
dirty: true,
profile: config.profile
}
var nextState = {}
var GL_STATE_NAMES = []
var GL_FLAGS = {}
var GL_VARIABLES = {}
function propName (name) {
return name.replace('.', '_')
}
function stateFlag (sname, cap, init) {
var name = propName(sname)
GL_STATE_NAMES.push(sname)
nextState[name] = currentState[name] = !!init
GL_FLAGS[name] = cap
}
function stateVariable (sname, func, init) {
var name = propName(sname)
GL_STATE_NAMES.push(sname)
if (Array.isArray(init)) {
currentState[name] = init.slice()
nextState[name] = init.slice()
} else {
currentState[name] = nextState[name] = init
}
GL_VARIABLES[name] = func
}
// Dithering
stateFlag(S_DITHER, GL_DITHER)
// Blending
stateFlag(S_BLEND_ENABLE, GL_BLEND)
stateVariable(S_BLEND_COLOR, 'blendColor', [0, 0, 0, 0])
stateVariable(S_BLEND_EQUATION, 'blendEquationSeparate',
[GL_FUNC_ADD, GL_FUNC_ADD])
stateVariable(S_BLEND_FUNC, 'blendFuncSeparate',
[GL_ONE, GL_ZERO, GL_ONE, GL_ZERO])
// Depth
stateFlag(S_DEPTH_ENABLE, GL_DEPTH_TEST, true)
stateVariable(S_DEPTH_FUNC, 'depthFunc', GL_LESS)
stateVariable(S_DEPTH_RANGE, 'depthRange', [0, 1])
stateVariable(S_DEPTH_MASK, 'depthMask', true)
// Color mask
stateVariable(S_COLOR_MASK, S_COLOR_MASK, [true, true, true, true])
// Face culling
stateFlag(S_CULL_ENABLE, GL_CULL_FACE)
stateVariable(S_CULL_FACE, 'cullFace', GL_BACK)
// Front face orientation
stateVariable(S_FRONT_FACE, S_FRONT_FACE, GL_CCW)
// Line width
stateVariable(S_LINE_WIDTH, S_LINE_WIDTH, 1)
// Polygon offset
stateFlag(S_POLYGON_OFFSET_ENABLE, GL_POLYGON_OFFSET_FILL)
stateVariable(S_POLYGON_OFFSET_OFFSET, 'polygonOffset', [0, 0])
// Sample coverage
stateFlag(S_SAMPLE_ALPHA, GL_SAMPLE_ALPHA_TO_COVERAGE)
stateFlag(S_SAMPLE_ENABLE, GL_SAMPLE_COVERAGE)
stateVariable(S_SAMPLE_COVERAGE, 'sampleCoverage', [1, false])
// Stencil
stateFlag(S_STENCIL_ENABLE, GL_STENCIL_TEST)
stateVariable(S_STENCIL_MASK, 'stencilMask', -1)
stateVariable(S_STENCIL_FUNC, 'stencilFunc', [GL_ALWAYS, 0, -1])
stateVariable(S_STENCIL_OPFRONT, 'stencilOpSeparate',
[GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP])
stateVariable(S_STENCIL_OPBACK, 'stencilOpSeparate',
[GL_BACK, GL_KEEP, GL_KEEP, GL_KEEP])
// Scissor
stateFlag(S_SCISSOR_ENABLE, GL_SCISSOR_TEST)
stateVariable(S_SCISSOR_BOX, 'scissor',
[0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])
// Viewport
stateVariable(S_VIEWPORT, S_VIEWPORT,
[0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])
// ===================================================
// ===================================================
// ENVIRONMENT
// ===================================================
// ===================================================
var sharedState = {
gl: gl,
context: contextState,
strings: stringStore,
next: nextState,
current: currentState,
draw: drawState,
elements: elementState,
buffer: bufferState,
shader: shaderState,
attributes: attributeState.state,
uniforms: uniformState,
framebuffer: framebufferState,
extensions: extensions,
timer: timer,
isBufferArgs: isBufferArgs
}
var sharedConstants = {
primTypes: primTypes,
compareFuncs: compareFuncs,
blendFuncs: blendFuncs,
blendEquations: blendEquations,
stencilOps: stencilOps,
glTypes: glTypes,
orientationType: orientationType
}
check.optional(function () {
sharedState.isArrayLike = isArrayLike
})
if (extDrawBuffers) {
sharedConstants.backBuffer = [GL_BACK]
sharedConstants.drawBuffer = loop(limits.maxDrawbuffers, function (i) {
if (i === 0) {
return [0]
}
return loop(i, function (j) {
return GL_COLOR_ATTACHMENT0 + j
})
})
}
var drawCallCounter = 0
function createREGLEnvironment () {
var env = createEnvironment()
var link = env.link
var global = env.global
env.id = drawCallCounter++
env.batchId = '0'
// link shared state
var SHARED = link(sharedState)
var shared = env.shared = {
props: 'a0'
}
Object.keys(sharedState).forEach(function (prop) {
shared[prop] = global.def(SHARED, '.', prop)
})
// Inject runtime assertion stuff for debug builds
check.optional(function () {
env.CHECK = link(check)
env.commandStr = check.guessCommand()
env.command = link(env.commandStr)
env.assert = function (block, pred, message) {
block(
'if(!(', pred, '))',
this.CHECK, '.commandRaise(', link(message), ',', this.command, ');')
}
sharedConstants.invalidBlendCombinations = invalidBlendCombinations
})
// Copy GL state variables over
var nextVars = env.next = {}
var currentVars = env.current = {}
Object.keys(GL_VARIABLES).forEach(function (variable) {
if (Array.isArray(currentState[variable])) {
nextVars[variable] = global.def(shared.next, '.', variable)
currentVars[variable] = global.def(shared.current, '.', variable)
}
})
// Initialize shared constants
var constants = env.constants = {}
Object.keys(sharedConstants).forEach(function (name) {
constants[name] = global.def(JSON.stringify(sharedConstants[name]))
})
// Helper function for calling a block
env.invoke = function (block, x) {
switch (x.type) {
case DYN_FUNC:
var argList = [
'this',
shared.context,
shared.props,
env.batchId
]
return block.def(
link(x.data), '.call(',
argList.slice(0, Math.max(x.data.length + 1, 4)),
')')
case DYN_PROP:
return block.def(shared.props, x.data)
case DYN_CONTEXT:
return block.def(shared.context, x.data)
case DYN_STATE:
return block.def('this', x.data)
case DYN_THUNK:
x.data.append(env, block)
return x.data.ref
}
}
env.attribCache = {}
var scopeAttribs = {}
env.scopeAttrib = function (name) {
var id = stringStore.id(name)
if (id in scopeAttribs) {
return scopeAttribs[id]
}
var binding = attributeState.scope[id]
if (!binding) {
binding = attributeState.scope[id] = new AttributeRecord()
}
var result = scopeAttribs[id] = link(binding)
return result
}
return env
}
// ===================================================
// ===================================================
// PARSING
// ===================================================
// ===================================================
function parseProfile (options) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
var profileEnable
if (S_PROFILE in staticOptions) {
var value = !!staticOptions[S_PROFILE]
profileEnable = createStaticDecl(function (env, scope) {
return value
})
profileEnable.enable = value
} else if (S_PROFILE in dynamicOptions) {
var dyn = dynamicOptions[S_PROFILE]
profileEnable = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
}
return profileEnable
}
function parseFramebuffer (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
if (S_FRAMEBUFFER in staticOptions) {
var framebuffer = staticOptions[S_FRAMEBUFFER]
if (framebuffer) {
framebuffer = framebufferState.getFramebuffer(framebuffer)
check.command(framebuffer, 'invalid framebuffer object')
return createStaticDecl(function (env, block) {
var FRAMEBUFFER = env.link(framebuffer)
var shared = env.shared
block.set(
shared.framebuffer,
'.next',
FRAMEBUFFER)
var CONTEXT = shared.context
block.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
FRAMEBUFFER + '.width')
block.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
FRAMEBUFFER + '.height')
return FRAMEBUFFER
})
} else {
return createStaticDecl(function (env, scope) {
var shared = env.shared
scope.set(
shared.framebuffer,
'.next',
'null')
var CONTEXT = shared.context
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)
return 'null'
})
}
} else if (S_FRAMEBUFFER in dynamicOptions) {
var dyn = dynamicOptions[S_FRAMEBUFFER]
return createDynamicDecl(dyn, function (env, scope) {
var FRAMEBUFFER_FUNC = env.invoke(scope, dyn)
var shared = env.shared
var FRAMEBUFFER_STATE = shared.framebuffer
var FRAMEBUFFER = scope.def(
FRAMEBUFFER_STATE, '.getFramebuffer(', FRAMEBUFFER_FUNC, ')')
check.optional(function () {
env.assert(scope,
'!' + FRAMEBUFFER_FUNC + '||' + FRAMEBUFFER,
'invalid framebuffer object')
})
scope.set(
FRAMEBUFFER_STATE,
'.next',
FRAMEBUFFER)
var CONTEXT = shared.context
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_WIDTH,
FRAMEBUFFER + '?' + FRAMEBUFFER + '.width:' +
CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)
scope.set(
CONTEXT,
'.' + S_FRAMEBUFFER_HEIGHT,
FRAMEBUFFER +
'?' + FRAMEBUFFER + '.height:' +
CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)
return FRAMEBUFFER
})
} else {
return null
}
}
function parseViewportScissor (options, framebuffer, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
function parseBox (param) {
if (param in staticOptions) {
var box = staticOptions[param]
check.commandType(box, 'object', 'invalid ' + param, env.commandStr)
var isStatic = true
var x = box.x | 0
var y = box.y | 0
check.command(x >= 0 && y >= 0, 'invalid ' + param, env.commandStr)
var w, h
if ('width' in box) {
w = box.width | 0
check.command(w > 0, 'invalid ' + param, env.commandStr)
} else {
isStatic = false
}
if ('height' in box) {
h = box.height | 0
check.command(h > 0, 'invalid ' + param, env.commandStr)
} else {
isStatic = false
}
return new Declaration(
!isStatic && framebuffer && framebuffer.thisDep,
!isStatic && framebuffer && framebuffer.contextDep,
!isStatic && framebuffer && framebuffer.propDep,
function (env, scope) {
var CONTEXT = env.shared.context
var BOX_W = w
if (!('width' in box)) {
BOX_W = scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', x)
} else {
check.command(w > 0, 'invalid ' + param, env.commandStr)
}
var BOX_H = h
if (!('height' in box)) {
BOX_H = scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', y)
} else {
check.command(h > 0, 'invalid ' + param, env.commandStr)
}
return [x, y, BOX_W, BOX_H]
})
} else if (param in dynamicOptions) {
var dynBox = dynamicOptions[param]
var result = createDynamicDecl(dynBox, function (env, scope) {
var BOX = env.invoke(scope, dynBox)
check.optional(function () {
env.assert(scope,
BOX + '&&typeof ' + BOX + '==="object"',
'invalid ' + param)
})
var CONTEXT = env.shared.context
var BOX_X = scope.def(BOX, '.x|0')
var BOX_Y = scope.def(BOX, '.y|0')
var BOX_W = scope.def(
'"width" in ', BOX, '?', BOX, '.width|0:',
'(', CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', BOX_X, ')')
var BOX_H = scope.def(
'"height" in ', BOX, '?', BOX, '.height|0:',
'(', CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', BOX_Y, ')')
check.optional(function () {
env.assert(scope,
BOX_X + '>=0&&' +
BOX_Y + '>=0&&' +
BOX_W + '>0&&' +
BOX_H + '>0',
'invalid ' + param)
})
return [BOX_X, BOX_Y, BOX_W, BOX_H]
})
if (framebuffer) {
result.thisDep = result.thisDep || framebuffer.thisDep
result.contextDep = result.contextDep || framebuffer.contextDep
result.propDep = result.propDep || framebuffer.propDep
}
return result
} else if (framebuffer) {
return new Declaration(
framebuffer.thisDep,
framebuffer.contextDep,
framebuffer.propDep,
function (env, scope) {
var CONTEXT = env.shared.context
return [
0, 0,
scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH),
scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT)]
})
} else {
return null
}
}
var viewport = parseBox(S_VIEWPORT)
if (viewport) {
var prevViewport = viewport
viewport = new Declaration(
viewport.thisDep,
viewport.contextDep,
viewport.propDep,
function (env, scope) {
var VIEWPORT = prevViewport.append(env, scope)
var CONTEXT = env.shared.context
scope.set(
CONTEXT,
'.' + S_VIEWPORT_WIDTH,
VIEWPORT[2])
scope.set(
CONTEXT,
'.' + S_VIEWPORT_HEIGHT,
VIEWPORT[3])
return VIEWPORT
})
}
return {
viewport: viewport,
scissor_box: parseBox(S_SCISSOR_BOX)
}
}
function parseProgram (options) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
function parseShader (name) {
if (name in staticOptions) {
var id = stringStore.id(staticOptions[name])
check.optional(function () {
shaderState.shader(shaderType[name], id, check.guessCommand())
})
var result = createStaticDecl(function () {
return id
})
result.id = id
return result
} else if (name in dynamicOptions) {
var dyn = dynamicOptions[name]
return createDynamicDecl(dyn, function (env, scope) {
var str = env.invoke(scope, dyn)
var id = scope.def(env.shared.strings, '.id(', str, ')')
check.optional(function () {
scope(
env.shared.shader, '.shader(',
shaderType[name], ',',
id, ',',
env.command, ');')
})
return id
})
}
return null
}
var frag = parseShader(S_FRAG)
var vert = parseShader(S_VERT)
var program = null
var progVar
if (isStatic(frag) && isStatic(vert)) {
program = shaderState.program(vert.id, frag.id)
progVar = createStaticDecl(function (env, scope) {
return env.link(program)
})
} else {
progVar = new Declaration(
(frag && frag.thisDep) || (vert && vert.thisDep),
(frag && frag.contextDep) || (vert && vert.contextDep),
(frag && frag.propDep) || (vert && vert.propDep),
function (env, scope) {
var SHADER_STATE = env.shared.shader
var fragId
if (frag) {
fragId = frag.append(env, scope)
} else {
fragId = scope.def(SHADER_STATE, '.', S_FRAG)
}
var vertId
if (vert) {
vertId = vert.append(env, scope)
} else {
vertId = scope.def(SHADER_STATE, '.', S_VERT)
}
var progDef = SHADER_STATE + '.program(' + vertId + ',' + fragId
check.optional(function () {
progDef += ',' + env.command
})
return scope.def(progDef + ')')
})
}
return {
frag: frag,
vert: vert,
progVar: progVar,
program: program
}
}
function parseDraw (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
function parseElements () {
if (S_ELEMENTS in staticOptions) {
var elements = staticOptions[S_ELEMENTS]
if (isBufferArgs(elements)) {
elements = elementState.getElements(elementState.create(elements, true))
} else if (elements) {
elements = elementState.getElements(elements)
check.command(elements, 'invalid elements', env.commandStr)
}
var result = createStaticDecl(function (env, scope) {
if (elements) {
var result = env.link(elements)
env.ELEMENTS = result
return result
}
env.ELEMENTS = null
return null
})
result.value = elements
return result
} else if (S_ELEMENTS in dynamicOptions) {
var dyn = dynamicOptions[S_ELEMENTS]
return createDynamicDecl(dyn, function (env, scope) {
var shared = env.shared
var IS_BUFFER_ARGS = shared.isBufferArgs
var ELEMENT_STATE = shared.elements
var elementDefn = env.invoke(scope, dyn)
var elements = scope.def('null')
var elementStream = scope.def(IS_BUFFER_ARGS, '(', elementDefn, ')')
var ifte = env.cond(elementStream)
.then(elements, '=', ELEMENT_STATE, '.createStream(', elementDefn, ');')
.else(elements, '=', ELEMENT_STATE, '.getElements(', elementDefn, ');')
check.optional(function () {
env.assert(ifte.else,
'!' + elementDefn + '||' + elements,
'invalid elements')
})
scope.entry(ifte)
scope.exit(
env.cond(elementStream)
.then(ELEMENT_STATE, '.destroyStream(', elements, ');'))
env.ELEMENTS = elements
return elements
})
}
return null
}
var elements = parseElements()
function parsePrimitive () {
if (S_PRIMITIVE in staticOptions) {
var primitive = staticOptions[S_PRIMITIVE]
check.commandParameter(primitive, primTypes, 'invalid primitve', env.commandStr)
return createStaticDecl(function (env, scope) {
return primTypes[primitive]
})
} else if (S_PRIMITIVE in dynamicOptions) {
var dynPrimitive = dynamicOptions[S_PRIMITIVE]
return createDynamicDecl(dynPrimitive, function (env, scope) {
var PRIM_TYPES = env.constants.primTypes
var prim = env.invoke(scope, dynPrimitive)
check.optional(function () {
env.assert(scope,
prim + ' in ' + PRIM_TYPES,
'invalid primitive, must be one of ' + Object.keys(primTypes))
})
return scope.def(PRIM_TYPES, '[', prim, ']')
})
} else if (elements) {
if (isStatic(elements)) {
if (elements.value) {
return createStaticDecl(function (env, scope) {
return scope.def(env.ELEMENTS, '.primType')
})
} else {
return createStaticDecl(function () {
return GL_TRIANGLES
})
}
} else {
return new Declaration(
elements.thisDep,
elements.contextDep,
elements.propDep,
function (env, scope) {
var elements = env.ELEMENTS
return scope.def(elements, '?', elements, '.primType:', GL_TRIANGLES)
})
}
}
return null
}
function parseParam (param, isOffset) {
if (param in staticOptions) {
var value = staticOptions[param] | 0
check.command(!isOffset || value >= 0, 'invalid ' + param, env.commandStr)
return createStaticDecl(function (env, scope) {
if (isOffset) {
env.OFFSET = value
}
return value
})
} else if (param in dynamicOptions) {
var dynValue = dynamicOptions[param]
return createDynamicDecl(dynValue, function (env, scope) {
var result = env.invoke(scope, dynValue)
if (isOffset) {
env.OFFSET = result
check.optional(function () {
env.assert(scope,
result + '>=0',
'invalid ' + param)
})
}
return result
})
} else if (isOffset && elements) {
return createStaticDecl(function (env, scope) {
env.OFFSET = '0'
return 0
})
}
return null
}
var OFFSET = parseParam(S_OFFSET, true)
function parseVertCount () {
if (S_COUNT in staticOptions) {
var count = staticOptions[S_COUNT] | 0
check.command(
typeof count === 'number' && count >= 0, 'invalid vertex count', env.commandStr)
return createStaticDecl(function () {
return count
})
} else if (S_COUNT in dynamicOptions) {
var dynCount = dynamicOptions[S_COUNT]
return createDynamicDecl(dynCount, function (env, scope) {
var result = env.invoke(scope, dynCount)
check.optional(function () {
env.assert(scope,
'typeof ' + result + '==="number"&&' +
result + '>=0&&' +
result + '===(' + result + '|0)',
'invalid vertex count')
})
return result
})
} else if (elements) {
if (isStatic(elements)) {
if (elements) {
if (OFFSET) {
return new Declaration(
OFFSET.thisDep,
OFFSET.contextDep,
OFFSET.propDep,
function (env, scope) {
var result = scope.def(
env.ELEMENTS, '.vertCount-', env.OFFSET)
check.optional(function () {
env.assert(scope,
result + '>=0',
'invalid vertex offset/element buffer too small')
})
return result
})
} else {
return createStaticDecl(function (env, scope) {
return scope.def(env.ELEMENTS, '.vertCount')
})
}
} else {
var result = createStaticDecl(function () {
return -1
})
check.optional(function () {
result.MISSING = true
})
return result
}
} else {
var variable = new Declaration(
elements.thisDep || OFFSET.thisDep,
elements.contextDep || OFFSET.contextDep,
elements.propDep || OFFSET.propDep,
function (env, scope) {
var elements = env.ELEMENTS
if (env.OFFSET) {
return scope.def(elements, '?', elements, '.vertCount-',
env.OFFSET, ':-1')
}
return scope.def(elements, '?', elements, '.vertCount:-1')
})
check.optional(function () {
variable.DYNAMIC = true
})
return variable
}
}
return null
}
return {
elements: elements,
primitive: parsePrimitive(),
count: parseVertCount(),
instances: parseParam(S_INSTANCES, false),
offset: OFFSET
}
}
function parseGLState (options, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
var STATE = {}
GL_STATE_NAMES.forEach(function (prop) {
var param = propName(prop)
function parseParam (parseStatic, parseDynamic) {
if (prop in staticOptions) {
var value = parseStatic(staticOptions[prop])
STATE[param] = createStaticDecl(function () {
return value
})
} else if (prop in dynamicOptions) {
var dyn = dynamicOptions[prop]
STATE[param] = createDynamicDecl(dyn, function (env, scope) {
return parseDynamic(env, scope, env.invoke(scope, dyn))
})
}
}
switch (prop) {
case S_CULL_ENABLE:
case S_BLEND_ENABLE:
case S_DITHER:
case S_STENCIL_ENABLE:
case S_DEPTH_ENABLE:
case S_SCISSOR_ENABLE:
case S_POLYGON_OFFSET_ENABLE:
case S_SAMPLE_ALPHA:
case S_SAMPLE_ENABLE:
case S_DEPTH_MASK:
return parseParam(
function (value) {
check.commandType(value, 'boolean', prop, env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="boolean"',
'invalid flag ' + prop, env.commandStr)
})
return value
})
case S_DEPTH_FUNC:
return parseParam(
function (value) {
check.commandParameter(value, compareFuncs, 'invalid ' + prop, env.commandStr)
return compareFuncs[value]
},
function (env, scope, value) {
var COMPARE_FUNCS = env.constants.compareFuncs
check.optional(function () {
env.assert(scope,
value + ' in ' + COMPARE_FUNCS,
'invalid ' + prop + ', must be one of ' + Object.keys(compareFuncs))
})
return scope.def(COMPARE_FUNCS, '[', value, ']')
})
case S_DEPTH_RANGE:
return parseParam(
function (value) {
check.command(
isArrayLike(value) &&
value.length === 2 &&
typeof value[0] === 'number' &&
typeof value[1] === 'number' &&
value[0] <= value[1],
'depth range is 2d array',
env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===2&&' +
'typeof ' + value + '[0]==="number"&&' +
'typeof ' + value + '[1]==="number"&&' +
value + '[0]<=' + value + '[1]',
'depth range must be a 2d array')
})
var Z_NEAR = scope.def('+', value, '[0]')
var Z_FAR = scope.def('+', value, '[1]')
return [Z_NEAR, Z_FAR]
})
case S_BLEND_FUNC:
return parseParam(
function (value) {
check.commandType(value, 'object', 'blend.func', env.commandStr)
var srcRGB = ('srcRGB' in value ? value.srcRGB : value.src)
var srcAlpha = ('srcAlpha' in value ? value.srcAlpha : value.src)
var dstRGB = ('dstRGB' in value ? value.dstRGB : value.dst)
var dstAlpha = ('dstAlpha' in value ? value.dstAlpha : value.dst)
check.commandParameter(srcRGB, blendFuncs, param + '.srcRGB', env.commandStr)
check.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha', env.commandStr)
check.commandParameter(dstRGB, blendFuncs, param + '.dstRGB', env.commandStr)
check.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha', env.commandStr)
check.command(
(invalidBlendCombinations.indexOf(srcRGB + ', ' + dstRGB) === -1),
'unallowed blending combination (srcRGB, dstRGB) = (' + srcRGB + ', ' + dstRGB + ')', env.commandStr)
return [
blendFuncs[srcRGB],
blendFuncs[dstRGB],
blendFuncs[srcAlpha],
blendFuncs[dstAlpha]
]
},
function (env, scope, value) {
var BLEND_FUNCS = env.constants.blendFuncs
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid blend func, must be an object')
})
function read (prefix, suffix) {
var func = scope.def(
'"', prefix, suffix, '" in ', value,
'?', value, '.', prefix, suffix,
':', value, '.', prefix)
check.optional(function () {
env.assert(scope,
func + ' in ' + BLEND_FUNCS,
'invalid ' + prop + '.' + prefix + suffix + ', must be one of ' + Object.keys(blendFuncs))
})
return func
}
var srcRGB = read('src', 'RGB')
var dstRGB = read('dst', 'RGB')
check.optional(function () {
var INVALID_BLEND_COMBINATIONS = env.constants.invalidBlendCombinations
env.assert(scope,
INVALID_BLEND_COMBINATIONS +
'.indexOf(' + srcRGB + '+", "+' + dstRGB + ') === -1 ',
'unallowed blending combination for (srcRGB, dstRGB)'
)
})
var SRC_RGB = scope.def(BLEND_FUNCS, '[', srcRGB, ']')
var SRC_ALPHA = scope.def(BLEND_FUNCS, '[', read('src', 'Alpha'), ']')
var DST_RGB = scope.def(BLEND_FUNCS, '[', dstRGB, ']')
var DST_ALPHA = scope.def(BLEND_FUNCS, '[', read('dst', 'Alpha'), ']')
return [SRC_RGB, DST_RGB, SRC_ALPHA, DST_ALPHA]
})
case S_BLEND_EQUATION:
return parseParam(
function (value) {
if (typeof value === 'string') {
check.commandParameter(value, blendEquations, 'invalid ' + prop, env.commandStr)
return [
blendEquations[value],
blendEquations[value]
]
} else if (typeof value === 'object') {
check.commandParameter(
value.rgb, blendEquations, prop + '.rgb', env.commandStr)
check.commandParameter(
value.alpha, blendEquations, prop + '.alpha', env.commandStr)
return [
blendEquations[value.rgb],
blendEquations[value.alpha]
]
} else {
check.commandRaise('invalid blend.equation', env.commandStr)
}
},
function (env, scope, value) {
var BLEND_EQUATIONS = env.constants.blendEquations
var RGB = scope.def()
var ALPHA = scope.def()
var ifte = env.cond('typeof ', value, '==="string"')
check.optional(function () {
function checkProp (block, name, value) {
env.assert(block,
value + ' in ' + BLEND_EQUATIONS,
'invalid ' + name + ', must be one of ' + Object.keys(blendEquations))
}
checkProp(ifte.then, prop, value)
env.assert(ifte.else,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
checkProp(ifte.else, prop + '.rgb', value + '.rgb')
checkProp(ifte.else, prop + '.alpha', value + '.alpha')
})
ifte.then(
RGB, '=', ALPHA, '=', BLEND_EQUATIONS, '[', value, '];')
ifte.else(
RGB, '=', BLEND_EQUATIONS, '[', value, '.rgb];',
ALPHA, '=', BLEND_EQUATIONS, '[', value, '.alpha];')
scope(ifte)
return [RGB, ALPHA]
})
case S_BLEND_COLOR:
return parseParam(
function (value) {
check.command(
isArrayLike(value) &&
value.length === 4,
'blend.color must be a 4d array', env.commandStr)
return loop(4, function (i) {
return +value[i]
})
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===4',
'blend.color must be a 4d array')
})
return loop(4, function (i) {
return scope.def('+', value, '[', i, ']')
})
})
case S_STENCIL_MASK:
return parseParam(
function (value) {
check.commandType(value, 'number', param, env.commandStr)
return value | 0
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="number"',
'invalid stencil.mask')
})
return scope.def(value, '|0')
})
case S_STENCIL_FUNC:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var cmp = value.cmp || 'keep'
var ref = value.ref || 0
var mask = 'mask' in value ? value.mask : -1
check.commandParameter(cmp, compareFuncs, prop + '.cmp', env.commandStr)
check.commandType(ref, 'number', prop + '.ref', env.commandStr)
check.commandType(mask, 'number', prop + '.mask', env.commandStr)
return [
compareFuncs[cmp],
ref,
mask
]
},
function (env, scope, value) {
var COMPARE_FUNCS = env.constants.compareFuncs
check.optional(function () {
function assert () {
env.assert(scope,
Array.prototype.join.call(arguments, ''),
'invalid stencil.func')
}
assert(value + '&&typeof ', value, '==="object"')
assert('!("cmp" in ', value, ')||(',
value, '.cmp in ', COMPARE_FUNCS, ')')
})
var cmp = scope.def(
'"cmp" in ', value,
'?', COMPARE_FUNCS, '[', value, '.cmp]',
':', GL_KEEP)
var ref = scope.def(value, '.ref|0')
var mask = scope.def(
'"mask" in ', value,
'?', value, '.mask|0:-1')
return [cmp, ref, mask]
})
case S_STENCIL_OPFRONT:
case S_STENCIL_OPBACK:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var fail = value.fail || 'keep'
var zfail = value.zfail || 'keep'
var zpass = value.zpass || 'keep'
check.commandParameter(fail, stencilOps, prop + '.fail', env.commandStr)
check.commandParameter(zfail, stencilOps, prop + '.zfail', env.commandStr)
check.commandParameter(zpass, stencilOps, prop + '.zpass', env.commandStr)
return [
prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,
stencilOps[fail],
stencilOps[zfail],
stencilOps[zpass]
]
},
function (env, scope, value) {
var STENCIL_OPS = env.constants.stencilOps
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
})
function read (name) {
check.optional(function () {
env.assert(scope,
'!("' + name + '" in ' + value + ')||' +
'(' + value + '.' + name + ' in ' + STENCIL_OPS + ')',
'invalid ' + prop + '.' + name + ', must be one of ' + Object.keys(stencilOps))
})
return scope.def(
'"', name, '" in ', value,
'?', STENCIL_OPS, '[', value, '.', name, ']:',
GL_KEEP)
}
return [
prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,
read('fail'),
read('zfail'),
read('zpass')
]
})
case S_POLYGON_OFFSET_OFFSET:
return parseParam(
function (value) {
check.commandType(value, 'object', param, env.commandStr)
var factor = value.factor | 0
var units = value.units | 0
check.commandType(factor, 'number', param + '.factor', env.commandStr)
check.commandType(units, 'number', param + '.units', env.commandStr)
return [factor, units]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid ' + prop)
})
var FACTOR = scope.def(value, '.factor|0')
var UNITS = scope.def(value, '.units|0')
return [FACTOR, UNITS]
})
case S_CULL_FACE:
return parseParam(
function (value) {
var face = 0
if (value === 'front') {
face = GL_FRONT
} else if (value === 'back') {
face = GL_BACK
}
check.command(!!face, param, env.commandStr)
return face
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '==="front"||' +
value + '==="back"',
'invalid cull.face')
})
return scope.def(value, '==="front"?', GL_FRONT, ':', GL_BACK)
})
case S_LINE_WIDTH:
return parseParam(
function (value) {
check.command(
typeof value === 'number' &&
value >= limits.lineWidthDims[0] &&
value <= limits.lineWidthDims[1],
'invalid line width, must positive number between ' +
limits.lineWidthDims[0] + ' and ' + limits.lineWidthDims[1], env.commandStr)
return value
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
'typeof ' + value + '==="number"&&' +
value + '>=' + limits.lineWidthDims[0] + '&&' +
value + '<=' + limits.lineWidthDims[1],
'invalid line width')
})
return value
})
case S_FRONT_FACE:
return parseParam(
function (value) {
check.commandParameter(value, orientationType, param, env.commandStr)
return orientationType[value]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '==="cw"||' +
value + '==="ccw"',
'invalid frontFace, must be one of cw,ccw')
})
return scope.def(value + '==="cw"?' + GL_CW + ':' + GL_CCW)
})
case S_COLOR_MASK:
return parseParam(
function (value) {
check.command(
isArrayLike(value) && value.length === 4,
'color.mask must be length 4 array', env.commandStr)
return value.map(function (v) { return !!v })
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
env.shared.isArrayLike + '(' + value + ')&&' +
value + '.length===4',
'invalid color.mask')
})
return loop(4, function (i) {
return '!!' + value + '[' + i + ']'
})
})
case S_SAMPLE_COVERAGE:
return parseParam(
function (value) {
check.command(typeof value === 'object' && value, param, env.commandStr)
var sampleValue = 'value' in value ? value.value : 1
var sampleInvert = !!value.invert
check.command(
typeof sampleValue === 'number' &&
sampleValue >= 0 && sampleValue <= 1,
'sample.coverage.value must be a number between 0 and 1', env.commandStr)
return [sampleValue, sampleInvert]
},
function (env, scope, value) {
check.optional(function () {
env.assert(scope,
value + '&&typeof ' + value + '==="object"',
'invalid sample.coverage')
})
var VALUE = scope.def(
'"value" in ', value, '?+', value, '.value:1')
var INVERT = scope.def('!!', value, '.invert')
return [VALUE, INVERT]
})
}
})
return STATE
}
function parseUniforms (uniforms, env) {
var staticUniforms = uniforms.static
var dynamicUniforms = uniforms.dynamic
var UNIFORMS = {}
Object.keys(staticUniforms).forEach(function (name) {
var value = staticUniforms[name]
var result
if (typeof value === 'number' ||
typeof value === 'boolean') {
result = createStaticDecl(function () {
return value
})
} else if (typeof value === 'function') {
var reglType = value._reglType
if (reglType === 'texture2d' ||
reglType === 'textureCube') {
result = createStaticDecl(function (env) {
return env.link(value)
})
} else if (reglType === 'framebuffer' ||
reglType === 'framebufferCube') {
check.command(value.color.length > 0,
'missing color attachment for framebuffer sent to uniform "' + name + '"', env.commandStr)
result = createStaticDecl(function (env) {
return env.link(value.color[0])
})
} else {
check.commandRaise('invalid data for uniform "' + name + '"', env.commandStr)
}
} else if (isArrayLike(value)) {
result = createStaticDecl(function (env) {
var ITEM = env.global.def('[',
loop(value.length, function (i) {
check.command(
typeof value[i] === 'number' ||
typeof value[i] === 'boolean',
'invalid uniform ' + name, env.commandStr)
return value[i]
}), ']')
return ITEM
})
} else {
check.commandRaise('invalid or missing data for uniform "' + name + '"', env.commandStr)
}
result.value = value
UNIFORMS[name] = result
})
Object.keys(dynamicUniforms).forEach(function (key) {
var dyn = dynamicUniforms[key]
UNIFORMS[key] = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
})
return UNIFORMS
}
function parseAttributes (attributes, env) {
var staticAttributes = attributes.static
var dynamicAttributes = attributes.dynamic
var attributeDefs = {}
Object.keys(staticAttributes).forEach(function (attribute) {
var value = staticAttributes[attribute]
var id = stringStore.id(attribute)
var record = new AttributeRecord()
if (isBufferArgs(value)) {
record.state = ATTRIB_STATE_POINTER
record.buffer = bufferState.getBuffer(
bufferState.create(value, GL_ARRAY_BUFFER, false, true))
record.type = 0
} else {
var buffer = bufferState.getBuffer(value)
if (buffer) {
record.state = ATTRIB_STATE_POINTER
record.buffer = buffer
record.type = 0
} else {
check.command(typeof value === 'object' && value,
'invalid data for attribute ' + attribute, env.commandStr)
if (value.constant) {
var constant = value.constant
record.buffer = 'null'
record.state = ATTRIB_STATE_CONSTANT
if (typeof constant === 'number') {
record.x = constant
} else {
check.command(
isArrayLike(constant) &&
constant.length > 0 &&
constant.length <= 4,
'invalid constant for attribute ' + attribute, env.commandStr)
CUTE_COMPONENTS.forEach(function (c, i) {
if (i < constant.length) {
record[c] = constant[i]
}
})
}
} else {
if (isBufferArgs(value.buffer)) {
buffer = bufferState.getBuffer(
bufferState.create(value.buffer, GL_ARRAY_BUFFER, false, true))
} else {
buffer = bufferState.getBuffer(value.buffer)
}
check.command(!!buffer, 'missing buffer for attribute "' + attribute + '"', env.commandStr)
var offset = value.offset | 0
check.command(offset >= 0,
'invalid offset for attribute "' + attribute + '"', env.commandStr)
var stride = value.stride | 0
check.command(stride >= 0 && stride < 256,
'invalid stride for attribute "' + attribute + '", must be integer betweeen [0, 255]', env.commandStr)
var size = value.size | 0
check.command(!('size' in value) || (size > 0 && size <= 4),
'invalid size for attribute "' + attribute + '", must be 1,2,3,4', env.commandStr)
var normalized = !!value.normalized
var type = 0
if ('type' in value) {
check.commandParameter(
value.type, glTypes,
'invalid type for attribute ' + attribute, env.commandStr)
type = glTypes[value.type]
}
var divisor = value.divisor | 0
if ('divisor' in value) {
check.command(divisor === 0 || extInstancing,
'cannot specify divisor for attribute "' + attribute + '", instancing not supported', env.commandStr)
check.command(divisor >= 0,
'invalid divisor for attribute "' + attribute + '"', env.commandStr)
}
check.optional(function () {
var command = env.commandStr
var VALID_KEYS = [
'buffer',
'offset',
'divisor',
'normalized',
'type',
'size',
'stride'
]
Object.keys(value).forEach(function (prop) {
check.command(
VALID_KEYS.indexOf(prop) >= 0,
'unknown parameter "' + prop + '" for attribute pointer "' + attribute + '" (valid parameters are ' + VALID_KEYS + ')',
command)
})
})
record.buffer = buffer
record.state = ATTRIB_STATE_POINTER
record.size = size
record.normalized = normalized
record.type = type || buffer.dtype
record.offset = offset
record.stride = stride
record.divisor = divisor
}
}
}
attributeDefs[attribute] = createStaticDecl(function (env, scope) {
var cache = env.attribCache
if (id in cache) {
return cache[id]
}
var result = {
isStream: false
}
Object.keys(record).forEach(function (key) {
result[key] = record[key]
})
if (record.buffer) {
result.buffer = env.link(record.buffer)
result.type = result.type || (result.buffer + '.dtype')
}
cache[id] = result
return result
})
})
Object.keys(dynamicAttributes).forEach(function (attribute) {
var dyn = dynamicAttributes[attribute]
function appendAttributeCode (env, block) {
var VALUE = env.invoke(block, dyn)
var shared = env.shared
var IS_BUFFER_ARGS = shared.isBufferArgs
var BUFFER_STATE = shared.buffer
// Perform validation on attribute
check.optional(function () {
env.assert(block,
VALUE + '&&(typeof ' + VALUE + '==="object"||typeof ' +
VALUE + '==="function")&&(' +
IS_BUFFER_ARGS + '(' + VALUE + ')||' +
BUFFER_STATE + '.getBuffer(' + VALUE + ')||' +
BUFFER_STATE + '.getBuffer(' + VALUE + '.buffer)||' +
IS_BUFFER_ARGS + '(' + VALUE + '.buffer)||' +
'("constant" in ' + VALUE +
'&&(typeof ' + VALUE + '.constant==="number"||' +
shared.isArrayLike + '(' + VALUE + '.constant))))',
'invalid dynamic attribute "' + attribute + '"')
})
// allocate names for result
var result = {
isStream: block.def(false)
}
var defaultRecord = new AttributeRecord()
defaultRecord.state = ATTRIB_STATE_POINTER
Object.keys(defaultRecord).forEach(function (key) {
result[key] = block.def('' + defaultRecord[key])
})
var BUFFER = result.buffer
var TYPE = result.type
block(
'if(', IS_BUFFER_ARGS, '(', VALUE, ')){',
result.isStream, '=true;',
BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, ');',
TYPE, '=', BUFFER, '.dtype;',
'}else{',
BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, ');',
'if(', BUFFER, '){',
TYPE, '=', BUFFER, '.dtype;',
'}else if("constant" in ', VALUE, '){',
result.state, '=', ATTRIB_STATE_CONSTANT, ';',
'if(typeof ' + VALUE + '.constant === "number"){',
result[CUTE_COMPONENTS[0]], '=', VALUE, '.constant;',
CUTE_COMPONENTS.slice(1).map(function (n) {
return result[n]
}).join('='), '=0;',
'}else{',
CUTE_COMPONENTS.map(function (name, i) {
return (
result[name] + '=' + VALUE + '.constant.length>=' + i +
'?' + VALUE + '.constant[' + i + ']:0;'
)
}).join(''),
'}}else{',
'if(', IS_BUFFER_ARGS, '(', VALUE, '.buffer)){',
BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, '.buffer);',
'}else{',
BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, '.buffer);',
'}',
TYPE, '="type" in ', VALUE, '?',
shared.glTypes, '[', VALUE, '.type]:', BUFFER, '.dtype;',
result.normalized, '=!!', VALUE, '.normalized;')
function emitReadRecord (name) {
block(result[name], '=', VALUE, '.', name, '|0;')
}
emitReadRecord('size')
emitReadRecord('offset')
emitReadRecord('stride')
emitReadRecord('divisor')
block('}}')
block.exit(
'if(', result.isStream, '){',
BUFFER_STATE, '.destroyStream(', BUFFER, ');',
'}')
return result
}
attributeDefs[attribute] = createDynamicDecl(dyn, appendAttributeCode)
})
return attributeDefs
}
function parseContext (context) {
var staticContext = context.static
var dynamicContext = context.dynamic
var result = {}
Object.keys(staticContext).forEach(function (name) {
var value = staticContext[name]
result[name] = createStaticDecl(function (env, scope) {
if (typeof value === 'number' || typeof value === 'boolean') {
return '' + value
} else {
return env.link(value)
}
})
})
Object.keys(dynamicContext).forEach(function (name) {
var dyn = dynamicContext[name]
result[name] = createDynamicDecl(dyn, function (env, scope) {
return env.invoke(scope, dyn)
})
})
return result
}
function parseArguments (options, attributes, uniforms, context, env) {
var staticOptions = options.static
var dynamicOptions = options.dynamic
check.optional(function () {
var KEY_NAMES = [
S_FRAMEBUFFER,
S_VERT,
S_FRAG,
S_ELEMENTS,
S_PRIMITIVE,
S_OFFSET,
S_COUNT,
S_INSTANCES,
S_PROFILE
].concat(GL_STATE_NAMES)
function checkKeys (dict) {
Object.keys(dict).forEach(function (key) {
check.command(
KEY_NAMES.indexOf(key) >= 0,
'unknown parameter "' + key + '"',
env.commandStr)
})
}
checkKeys(staticOptions)
checkKeys(dynamicOptions)
})
var framebuffer = parseFramebuffer(options, env)
var viewportAndScissor = parseViewportScissor(options, framebuffer, env)
var draw = parseDraw(options, env)
var state = parseGLState(options, env)
var shader = parseProgram(options, env)
function copyBox (name) {
var defn = viewportAndScissor[name]
if (defn) {
state[name] = defn
}
}
copyBox(S_VIEWPORT)
copyBox(propName(S_SCISSOR_BOX))
var dirty = Object.keys(state).length > 0
var result = {
framebuffer: framebuffer,
draw: draw,
shader: shader,
state: state,
dirty: dirty
}
result.profile = parseProfile(options, env)
result.uniforms = parseUniforms(uniforms, env)
result.attributes = parseAttributes(attributes, env)
result.context = parseContext(context, env)
return result
}
// ===================================================
// ===================================================
// COMMON UPDATE FUNCTIONS
// ===================================================
// ===================================================
function emitContext (env, scope, context) {
var shared = env.shared
var CONTEXT = shared.context
var contextEnter = env.scope()
Object.keys(context).forEach(function (name) {
scope.save(CONTEXT, '.' + name)
var defn = context[name]
contextEnter(CONTEXT, '.', name, '=', defn.append(env, scope), ';')
})
scope(contextEnter)
}
// ===================================================
// ===================================================
// COMMON DRAWING FUNCTIONS
// ===================================================
// ===================================================
function emitPollFramebuffer (env, scope, framebuffer, skipCheck) {
var shared = env.shared
var GL = shared.gl
var FRAMEBUFFER_STATE = shared.framebuffer
var EXT_DRAW_BUFFERS
if (extDrawBuffers) {
EXT_DRAW_BUFFERS = scope.def(shared.extensions, '.webgl_draw_buffers')
}
var constants = env.constants
var DRAW_BUFFERS = constants.drawBuffer
var BACK_BUFFER = constants.backBuffer
var NEXT
if (framebuffer) {
NEXT = framebuffer.append(env, scope)
} else {
NEXT = scope.def(FRAMEBUFFER_STATE, '.next')
}
if (!skipCheck) {
scope('if(', NEXT, '!==', FRAMEBUFFER_STATE, '.cur){')
}
scope(
'if(', NEXT, '){',
GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',', NEXT, '.framebuffer);')
if (extDrawBuffers) {
scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(',
DRAW_BUFFERS, '[', NEXT, '.colorAttachments.length]);')
}
scope('}else{',
GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',null);')
if (extDrawBuffers) {
scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(', BACK_BUFFER, ');')
}
scope(
'}',
FRAMEBUFFER_STATE, '.cur=', NEXT, ';')
if (!skipCheck) {
scope('}')
}
}
function emitPollState (env, scope, args) {
var shared = env.shared
var GL = shared.gl
var CURRENT_VARS = env.current
var NEXT_VARS = env.next
var CURRENT_STATE = shared.current
var NEXT_STATE = shared.next
var block = env.cond(CURRENT_STATE, '.dirty')
GL_STATE_NAMES.forEach(function (prop) {
var param = propName(prop)
if (param in args.state) {
return
}
var NEXT, CURRENT
if (param in NEXT_VARS) {
NEXT = NEXT_VARS[param]
CURRENT = CURRENT_VARS[param]
var parts = loop(currentState[param].length, function (i) {
return block.def(NEXT, '[', i, ']')
})
block(env.cond(parts.map(function (p, i) {
return p + '!==' + CURRENT + '[' + i + ']'
}).join('||'))
.then(
GL, '.', GL_VARIABLES[param], '(', parts, ');',
parts.map(function (p, i) {
return CURRENT + '[' + i + ']=' + p
}).join(';'), ';'))
} else {
NEXT = block.def(NEXT_STATE, '.', param)
var ifte = env.cond(NEXT, '!==', CURRENT_STATE, '.', param)
block(ifte)
if (param in GL_FLAGS) {
ifte(
env.cond(NEXT)
.then(GL, '.enable(', GL_FLAGS[param], ');')
.else(GL, '.disable(', GL_FLAGS[param], ');'),
CURRENT_STATE, '.', param, '=', NEXT, ';')
} else {
ifte(
GL, '.', GL_VARIABLES[param], '(', NEXT, ');',
CURRENT_STATE, '.', param, '=', NEXT, ';')
}
}
})
if (Object.keys(args.state).length === 0) {
block(CURRENT_STATE, '.dirty=false;')
}
scope(block)
}
function emitSetOptions (env, scope, options, filter) {
var shared = env.shared
var CURRENT_VARS = env.current
var CURRENT_STATE = shared.current
var GL = shared.gl
sortState(Object.keys(options)).forEach(function (param) {
var defn = options[param]
if (filter && !filter(defn)) {
return
}
var variable = defn.append(env, scope)
if (GL_FLAGS[param]) {
var flag = GL_FLAGS[param]
if (isStatic(defn)) {
if (variable) {
scope(GL, '.enable(', flag, ');')
} else {
scope(GL, '.disable(', flag, ');')
}
} else {
scope(env.cond(variable)
.then(GL, '.enable(', flag, ');')
.else(GL, '.disable(', flag, ');'))
}
scope(CURRENT_STATE, '.', param, '=', variable, ';')
} else if (isArrayLike(variable)) {
var CURRENT = CURRENT_VARS[param]
scope(
GL, '.', GL_VARIABLES[param], '(', variable, ');',
variable.map(function (v, i) {
return CURRENT + '[' + i + ']=' + v
}).join(';'), ';')
} else {
scope(
GL, '.', GL_VARIABLES[param], '(', variable, ');',
CURRENT_STATE, '.', param, '=', variable, ';')
}
})
}
function injectExtensions (env, scope) {
if (extInstancing) {
env.instancing = scope.def(
env.shared.extensions, '.angle_instanced_arrays')
}
}
function emitProfile (env, scope, args, useScope, incrementCounter) {
var shared = env.shared
var STATS = env.stats
var CURRENT_STATE = shared.current
var TIMER = shared.timer
var profileArg = args.profile
function perfCounter () {
if (typeof performance === 'undefined') {
return 'Date.now()'
} else {
return 'performance.now()'
}
}
var CPU_START, QUERY_COUNTER
function emitProfileStart (block) {
CPU_START = scope.def()
block(CPU_START, '=', perfCounter(), ';')
if (typeof incrementCounter === 'string') {
block(STATS, '.count+=', incrementCounter, ';')
} else {
block(STATS, '.count++;')
}
if (timer) {
if (useScope) {
QUERY_COUNTER = scope.def()
block(QUERY_COUNTER, '=', TIMER, '.getNumPendingQueries();')
} else {
block(TIMER, '.beginQuery(', STATS, ');')
}
}
}
function emitProfileEnd (block) {
block(STATS, '.cpuTime+=', perfCounter(), '-', CPU_START, ';')
if (timer) {
if (useScope) {
block(TIMER, '.pushScopeStats(',
QUERY_COUNTER, ',',
TIMER, '.getNumPendingQueries(),',
STATS, ');')
} else {
block(TIMER, '.endQuery();')
}
}
}
function scopeProfile (value) {
var prev = scope.def(CURRENT_STATE, '.profile')
scope(CURRENT_STATE, '.profile=', value, ';')
scope.exit(CURRENT_STATE, '.profile=', prev, ';')
}
var USE_PROFILE
if (profileArg) {
if (isStatic(profileArg)) {
if (profileArg.enable) {
emitProfileStart(scope)
emitProfileEnd(scope.exit)
scopeProfile('true')
} else {
scopeProfile('false')
}
return
}
USE_PROFILE = profileArg.append(env, scope)
scopeProfile(USE_PROFILE)
} else {
USE_PROFILE = scope.def(CURRENT_STATE, '.profile')
}
var start = env.block()
emitProfileStart(start)
scope('if(', USE_PROFILE, '){', start, '}')
var end = env.block()
emitProfileEnd(end)
scope.exit('if(', USE_PROFILE, '){', end, '}')
}
function emitAttributes (env, scope, args, attributes, filter) {
var shared = env.shared
function typeLength (x) {
switch (x) {
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_BOOL_VEC2:
return 2
case GL_FLOAT_VEC3:
case GL_INT_VEC3:
case GL_BOOL_VEC3:
return 3
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_BOOL_VEC4:
return 4
default:
return 1
}
}
function emitBindAttribute (ATTRIBUTE, size, record) {
var GL = shared.gl
var LOCATION = scope.def(ATTRIBUTE, '.location')
var BINDING = scope.def(shared.attributes, '[', LOCATION, ']')
var STATE = record.state
var BUFFER = record.buffer
var CONST_COMPONENTS = [
record.x,
record.y,
record.z,
record.w
]
var COMMON_KEYS = [
'buffer',
'normalized',
'offset',
'stride'
]
function emitBuffer () {
scope(
'if(!', BINDING, '.buffer){',
GL, '.enableVertexAttribArray(', LOCATION, ');}')
var TYPE = record.type
var SIZE
if (!record.size) {
SIZE = size
} else {
SIZE = scope.def(record.size, '||', size)
}
scope('if(',
BINDING, '.type!==', TYPE, '||',
BINDING, '.size!==', SIZE, '||',
COMMON_KEYS.map(function (key) {
return BINDING + '.' + key + '!==' + record[key]
}).join('||'),
'){',
GL, '.bindBuffer(', GL_ARRAY_BUFFER, ',', BUFFER, '.buffer);',
GL, '.vertexAttribPointer(', [
LOCATION,
SIZE,
TYPE,
record.normalized,
record.stride,
record.offset
], ');',
BINDING, '.type=', TYPE, ';',
BINDING, '.size=', SIZE, ';',
COMMON_KEYS.map(function (key) {
return BINDING + '.' + key + '=' + record[key] + ';'
}).join(''),
'}')
if (extInstancing) {
var DIVISOR = record.divisor
scope(
'if(', BINDING, '.divisor!==', DIVISOR, '){',
env.instancing, '.vertexAttribDivisorANGLE(', [LOCATION, DIVISOR], ');',
BINDING, '.divisor=', DIVISOR, ';}')
}
}
function emitConstant () {
scope(
'if(', BINDING, '.buffer){',
GL, '.disableVertexAttribArray(', LOCATION, ');',
'}if(', CUTE_COMPONENTS.map(function (c, i) {
return BINDING + '.' + c + '!==' + CONST_COMPONENTS[i]
}).join('||'), '){',
GL, '.vertexAttrib4f(', LOCATION, ',', CONST_COMPONENTS, ');',
CUTE_COMPONENTS.map(function (c, i) {
return BINDING + '.' + c + '=' + CONST_COMPONENTS[i] + ';'
}).join(''),
'}')
}
if (STATE === ATTRIB_STATE_POINTER) {
emitBuffer()
} else if (STATE === ATTRIB_STATE_CONSTANT) {
emitConstant()
} else {
scope('if(', STATE, '===', ATTRIB_STATE_POINTER, '){')
emitBuffer()
scope('}else{')
emitConstant()
scope('}')
}
}
attributes.forEach(function (attribute) {
var name = attribute.name
var arg = args.attributes[name]
var record
if (arg) {
if (!filter(arg)) {
return
}
record = arg.append(env, scope)
} else {
if (!filter(SCOPE_DECL)) {
return
}
var scopeAttrib = env.scopeAttrib(name)
check.optional(function () {
env.assert(scope,
scopeAttrib + '.state',
'missing attribute ' + name)
})
record = {}
Object.keys(new AttributeRecord()).forEach(function (key) {
record[key] = scope.def(scopeAttrib, '.', key)
})
}
emitBindAttribute(
env.link(attribute), typeLength(attribute.info.type), record)
})
}
function emitUniforms (env, scope, args, uniforms, filter) {
var shared = env.shared
var GL = shared.gl
var infix
for (var i = 0; i < uniforms.length; ++i) {
var uniform = uniforms[i]
var name = uniform.name
var type = uniform.info.type
var arg = args.uniforms[name]
var UNIFORM = env.link(uniform)
var LOCATION = UNIFORM + '.location'
var VALUE
if (arg) {
if (!filter(arg)) {
continue
}
if (isStatic(arg)) {
var value = arg.value
check.command(
value !== null && typeof value !== 'undefined',
'missing uniform "' + name + '"', env.commandStr)
if (type === GL_SAMPLER_2D || type === GL_SAMPLER_CUBE) {
check.command(
typeof value === 'function' &&
((type === GL_SAMPLER_2D &&
(value._reglType === 'texture2d' ||
value._reglType === 'framebuffer')) ||
(type === GL_SAMPLER_CUBE &&
(value._reglType === 'textureCube' ||
value._reglType === 'framebufferCube'))),
'invalid texture for uniform ' + name, env.commandStr)
var TEX_VALUE = env.link(value._texture || value.color[0]._texture)
scope(GL, '.uniform1i(', LOCATION, ',', TEX_VALUE + '.bind());')
scope.exit(TEX_VALUE, '.unbind();')
} else if (
type === GL_FLOAT_MAT2 ||
type === GL_FLOAT_MAT3 ||
type === GL_FLOAT_MAT4) {
check.optional(function () {
check.command(isArrayLike(value),
'invalid matrix for uniform ' + name, env.commandStr)
check.command(
(type === GL_FLOAT_MAT2 && value.length === 4) ||
(type === GL_FLOAT_MAT3 && value.length === 9) ||
(type === GL_FLOAT_MAT4 && value.length === 16),
'invalid length for matrix uniform ' + name, env.commandStr)
})
var MAT_VALUE = env.global.def('new Float32Array([' +
Array.prototype.slice.call(value) + '])')
var dim = 2
if (type === GL_FLOAT_MAT3) {
dim = 3
} else if (type === GL_FLOAT_MAT4) {
dim = 4
}
scope(
GL, '.uniformMatrix', dim, 'fv(',
LOCATION, ',false,', MAT_VALUE, ');')
} else {
switch (type) {
case GL_FLOAT:
check.commandType(value, 'number', 'uniform ' + name, env.commandStr)
infix = '1f'
break
case GL_FLOAT_VEC2:
check.command(
isArrayLike(value) && value.length === 2,
'uniform ' + name, env.commandStr)
infix = '2f'
break
case GL_FLOAT_VEC3:
check.command(
isArrayLike(value) && value.length === 3,
'uniform ' + name, env.commandStr)
infix = '3f'
break
case GL_FLOAT_VEC4:
check.command(
isArrayLike(value) && value.length === 4,
'uniform ' + name, env.commandStr)
infix = '4f'
break
case GL_BOOL:
check.commandType(value, 'boolean', 'uniform ' + name, env.commandStr)
infix = '1i'
break
case GL_INT:
check.commandType(value, 'number', 'uniform ' + name, env.commandStr)
infix = '1i'
break
case GL_BOOL_VEC2:
check.command(
isArrayLike(value) && value.length === 2,
'uniform ' + name, env.commandStr)
infix = '2i'
break
case GL_INT_VEC2:
check.command(
isArrayLike(value) && value.length === 2,
'uniform ' + name, env.commandStr)
infix = '2i'
break
case GL_BOOL_VEC3:
check.command(
isArrayLike(value) && value.length === 3,
'uniform ' + name, env.commandStr)
infix = '3i'
break
case GL_INT_VEC3:
check.command(
isArrayLike(value) && value.length === 3,
'uniform ' + name, env.commandStr)
infix = '3i'
break
case GL_BOOL_VEC4:
check.command(
isArrayLike(value) && value.length === 4,
'uniform ' + name, env.commandStr)
infix = '4i'
break
case GL_INT_VEC4:
check.command(
isArrayLike(value) && value.length === 4,
'uniform ' + name, env.commandStr)
infix = '4i'
break
}
scope(GL, '.uniform', infix, '(', LOCATION, ',',
isArrayLike(value) ? Array.prototype.slice.call(value) : value,
');')
}
continue
} else {
VALUE = arg.append(env, scope)
}
} else {
if (!filter(SCOPE_DECL)) {
continue
}
VALUE = scope.def(shared.uniforms, '[', stringStore.id(name), ']')
}
if (type === GL_SAMPLER_2D) {
scope(
'if(', VALUE, '&&', VALUE, '._reglType==="framebuffer"){',
VALUE, '=', VALUE, '.color[0];',
'}')
} else if (type === GL_SAMPLER_CUBE) {
scope(
'if(', VALUE, '&&', VALUE, '._reglType==="framebufferCube"){',
VALUE, '=', VALUE, '.color[0];',
'}')
}
// perform type validation
check.optional(function () {
function check (pred, message) {
env.assert(scope, pred,
'bad data or missing for uniform "' + name + '". ' + message)
}
function checkType (type) {
check(
'typeof ' + VALUE + '==="' + type + '"',
'invalid type, expected ' + type)
}
function checkVector (n, type) {
check(
shared.isArrayLike + '(' + VALUE + ')&&' + VALUE + '.length===' + n,
'invalid vector, should have length ' + n, env.commandStr)
}
function checkTexture (target) {
check(
'typeof ' + VALUE + '==="function"&&' +
VALUE + '._reglType==="texture' +
(target === GL_TEXTURE_2D ? '2d' : 'Cube') + '"',
'invalid texture type', env.commandStr)
}
switch (type) {
case GL_INT:
checkType('number')
break
case GL_INT_VEC2:
checkVector(2, 'number')
break
case GL_INT_VEC3:
checkVector(3, 'number')
break
case GL_INT_VEC4:
checkVector(4, 'number')
break
case GL_FLOAT:
checkType('number')
break
case GL_FLOAT_VEC2:
checkVector(2, 'number')
break
case GL_FLOAT_VEC3:
checkVector(3, 'number')
break
case GL_FLOAT_VEC4:
checkVector(4, 'number')
break
case GL_BOOL:
checkType('boolean')
break
case GL_BOOL_VEC2:
checkVector(2, 'boolean')
break
case GL_BOOL_VEC3:
checkVector(3, 'boolean')
break
case GL_BOOL_VEC4:
checkVector(4, 'boolean')
break
case GL_FLOAT_MAT2:
checkVector(4, 'number')
break
case GL_FLOAT_MAT3:
checkVector(9, 'number')
break
case GL_FLOAT_MAT4:
checkVector(16, 'number')
break
case GL_SAMPLER_2D:
checkTexture(GL_TEXTURE_2D)
break
case GL_SAMPLER_CUBE:
checkTexture(GL_TEXTURE_CUBE_MAP)
break
}
})
var unroll = 1
switch (type) {
case GL_SAMPLER_2D:
case GL_SAMPLER_CUBE:
var TEX = scope.def(VALUE, '._texture')
scope(GL, '.uniform1i(', LOCATION, ',', TEX, '.bind());')
scope.exit(TEX, '.unbind();')
continue
case GL_INT:
case GL_BOOL:
infix = '1i'
break
case GL_INT_VEC2:
case GL_BOOL_VEC2:
infix = '2i'
unroll = 2
break
case GL_INT_VEC3:
case GL_BOOL_VEC3:
infix = '3i'
unroll = 3
break
case GL_INT_VEC4:
case GL_BOOL_VEC4:
infix = '4i'
unroll = 4
break
case GL_FLOAT:
infix = '1f'
break
case GL_FLOAT_VEC2:
infix = '2f'
unroll = 2
break
case GL_FLOAT_VEC3:
infix = '3f'
unroll = 3
break
case GL_FLOAT_VEC4:
infix = '4f'
unroll = 4
break
case GL_FLOAT_MAT2:
infix = 'Matrix2fv'
break
case GL_FLOAT_MAT3:
infix = 'Matrix3fv'
break
case GL_FLOAT_MAT4:
infix = 'Matrix4fv'
break
}
scope(GL, '.uniform', infix, '(', LOCATION, ',')
if (infix.charAt(0) === 'M') {
var matSize = Math.pow(type - GL_FLOAT_MAT2 + 2, 2)
var STORAGE = env.global.def('new Float32Array(', matSize, ')')
scope(
'false,(Array.isArray(', VALUE, ')||', VALUE, ' instanceof Float32Array)?', VALUE, ':(',
loop(matSize, function (i) {
return STORAGE + '[' + i + ']=' + VALUE + '[' + i + ']'
}), ',', STORAGE, ')')
} else if (unroll > 1) {
scope(loop(unroll, function (i) {
return VALUE + '[' + i + ']'
}))
} else {
scope(VALUE)
}
scope(');')
}
}
function emitDraw (env, outer, inner, args) {
var shared = env.shared
var GL = shared.gl
var DRAW_STATE = shared.draw
var drawOptions = args.draw
function emitElements () {
var defn = drawOptions.elements
var ELEMENTS
var scope = outer
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
scope = inner
}
ELEMENTS = defn.append(env, scope)
} else {
ELEMENTS = scope.def(DRAW_STATE, '.', S_ELEMENTS)
}
if (ELEMENTS) {
scope(
'if(' + ELEMENTS + ')' +
GL + '.bindBuffer(' + GL_ELEMENT_ARRAY_BUFFER + ',' + ELEMENTS + '.buffer.buffer);')
}
return ELEMENTS
}
function emitCount () {
var defn = drawOptions.count
var COUNT
var scope = outer
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
scope = inner
}
COUNT = defn.append(env, scope)
check.optional(function () {
if (defn.MISSING) {
env.assert(outer, 'false', 'missing vertex count')
}
if (defn.DYNAMIC) {
env.assert(scope, COUNT + '>=0', 'missing vertex count')
}
})
} else {
COUNT = scope.def(DRAW_STATE, '.', S_COUNT)
check.optional(function () {
env.assert(scope, COUNT + '>=0', 'missing vertex count')
})
}
return COUNT
}
var ELEMENTS = emitElements()
function emitValue (name) {
var defn = drawOptions[name]
if (defn) {
if ((defn.contextDep && args.contextDynamic) || defn.propDep) {
return defn.append(env, inner)
} else {
return defn.append(env, outer)
}
} else {
return outer.def(DRAW_STATE, '.', name)
}
}
var PRIMITIVE = emitValue(S_PRIMITIVE)
var OFFSET = emitValue(S_OFFSET)
var COUNT = emitCount()
if (typeof COUNT === 'number') {
if (COUNT === 0) {
return
}
} else {
inner('if(', COUNT, '){')
inner.exit('}')
}
var INSTANCES, EXT_INSTANCING
if (extInstancing) {
INSTANCES = emitValue(S_INSTANCES)
EXT_INSTANCING = env.instancing
}
var ELEMENT_TYPE = ELEMENTS + '.type'
var elementsStatic = drawOptions.elements && isStatic(drawOptions.elements)
function emitInstancing () {
function drawElements () {
inner(EXT_INSTANCING, '.drawElementsInstancedANGLE(', [
PRIMITIVE,
COUNT,
ELEMENT_TYPE,
OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)',
INSTANCES
], ');')
}
function drawArrays () {
inner(EXT_INSTANCING, '.drawArraysInstancedANGLE(',
[PRIMITIVE, OFFSET, COUNT, INSTANCES], ');')
}
if (ELEMENTS) {
if (!elementsStatic) {
inner('if(', ELEMENTS, '){')
drawElements()
inner('}else{')
drawArrays()
inner('}')
} else {
drawElements()
}
} else {
drawArrays()
}
}
function emitRegular () {
function drawElements () {
inner(GL + '.drawElements(' + [
PRIMITIVE,
COUNT,
ELEMENT_TYPE,
OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)'
] + ');')
}
function drawArrays () {
inner(GL + '.drawArrays(' + [PRIMITIVE, OFFSET, COUNT] + ');')
}
if (ELEMENTS) {
if (!elementsStatic) {
inner('if(', ELEMENTS, '){')
drawElements()
inner('}else{')
drawArrays()
inner('}')
} else {
drawElements()
}
} else {
drawArrays()
}
}
if (extInstancing && (typeof INSTANCES !== 'number' || INSTANCES >= 0)) {
if (typeof INSTANCES === 'string') {
inner('if(', INSTANCES, '>0){')
emitInstancing()
inner('}else if(', INSTANCES, '<0){')
emitRegular()
inner('}')
} else {
emitInstancing()
}
} else {
emitRegular()
}
}
function createBody (emitBody, parentEnv, args, program, count) {
var env = createREGLEnvironment()
var scope = env.proc('body', count)
check.optional(function () {
env.commandStr = parentEnv.commandStr
env.command = env.link(parentEnv.commandStr)
})
if (extInstancing) {
env.instancing = scope.def(
env.shared.extensions, '.angle_instanced_arrays')
}
emitBody(env, scope, args, program)
return env.compile().body
}
// ===================================================
// ===================================================
// DRAW PROC
// ===================================================
// ===================================================
function emitDrawBody (env, draw, args, program) {
injectExtensions(env, draw)
emitAttributes(env, draw, args, program.attributes, function () {
return true
})
emitUniforms(env, draw, args, program.uniforms, function () {
return true
})
emitDraw(env, draw, draw, args)
}
function emitDrawProc (env, args) {
var draw = env.proc('draw', 1)
injectExtensions(env, draw)
emitContext(env, draw, args.context)
emitPollFramebuffer(env, draw, args.framebuffer)
emitPollState(env, draw, args)
emitSetOptions(env, draw, args.state)
emitProfile(env, draw, args, false, true)
var program = args.shader.progVar.append(env, draw)
draw(env.shared.gl, '.useProgram(', program, '.program);')
if (args.shader.program) {
emitDrawBody(env, draw, args, args.shader.program)
} else {
var drawCache = env.global.def('{}')
var PROG_ID = draw.def(program, '.id')
var CACHED_PROC = draw.def(drawCache, '[', PROG_ID, ']')
draw(
env.cond(CACHED_PROC)
.then(CACHED_PROC, '.call(this,a0);')
.else(
CACHED_PROC, '=', drawCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(emitDrawBody, env, args, program, 1)
}), '(', program, ');',
CACHED_PROC, '.call(this,a0);'))
}
if (Object.keys(args.state).length > 0) {
draw(env.shared.current, '.dirty=true;')
}
}
// ===================================================
// ===================================================
// BATCH PROC
// ===================================================
// ===================================================
function emitBatchDynamicShaderBody (env, scope, args, program) {
env.batchId = 'a1'
injectExtensions(env, scope)
function all () {
return true
}
emitAttributes(env, scope, args, program.attributes, all)
emitUniforms(env, scope, args, program.uniforms, all)
emitDraw(env, scope, scope, args)
}
function emitBatchBody (env, scope, args, program) {
injectExtensions(env, scope)
var contextDynamic = args.contextDep
var BATCH_ID = scope.def()
var PROP_LIST = 'a0'
var NUM_PROPS = 'a1'
var PROPS = scope.def()
env.shared.props = PROPS
env.batchId = BATCH_ID
var outer = env.scope()
var inner = env.scope()
scope(
outer.entry,
'for(', BATCH_ID, '=0;', BATCH_ID, '<', NUM_PROPS, ';++', BATCH_ID, '){',
PROPS, '=', PROP_LIST, '[', BATCH_ID, '];',
inner,
'}',
outer.exit)
function isInnerDefn (defn) {
return ((defn.contextDep && contextDynamic) || defn.propDep)
}
function isOuterDefn (defn) {
return !isInnerDefn(defn)
}
if (args.needsContext) {
emitContext(env, inner, args.context)
}
if (args.needsFramebuffer) {
emitPollFramebuffer(env, inner, args.framebuffer)
}
emitSetOptions(env, inner, args.state, isInnerDefn)
if (args.profile && isInnerDefn(args.profile)) {
emitProfile(env, inner, args, false, true)
}
if (!program) {
var progCache = env.global.def('{}')
var PROGRAM = args.shader.progVar.append(env, inner)
var PROG_ID = inner.def(PROGRAM, '.id')
var CACHED_PROC = inner.def(progCache, '[', PROG_ID, ']')
inner(
env.shared.gl, '.useProgram(', PROGRAM, '.program);',
'if(!', CACHED_PROC, '){',
CACHED_PROC, '=', progCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(
emitBatchDynamicShaderBody, env, args, program, 2)
}), '(', PROGRAM, ');}',
CACHED_PROC, '.call(this,a0[', BATCH_ID, '],', BATCH_ID, ');')
} else {
emitAttributes(env, outer, args, program.attributes, isOuterDefn)
emitAttributes(env, inner, args, program.attributes, isInnerDefn)
emitUniforms(env, outer, args, program.uniforms, isOuterDefn)
emitUniforms(env, inner, args, program.uniforms, isInnerDefn)
emitDraw(env, outer, inner, args)
}
}
function emitBatchProc (env, args) {
var batch = env.proc('batch', 2)
env.batchId = '0'
injectExtensions(env, batch)
// Check if any context variables depend on props
var contextDynamic = false
var needsContext = true
Object.keys(args.context).forEach(function (name) {
contextDynamic = contextDynamic || args.context[name].propDep
})
if (!contextDynamic) {
emitContext(env, batch, args.context)
needsContext = false
}
// framebuffer state affects framebufferWidth/height context vars
var framebuffer = args.framebuffer
var needsFramebuffer = false
if (framebuffer) {
if (framebuffer.propDep) {
contextDynamic = needsFramebuffer = true
} else if (framebuffer.contextDep && contextDynamic) {
needsFramebuffer = true
}
if (!needsFramebuffer) {
emitPollFramebuffer(env, batch, framebuffer)
}
} else {
emitPollFramebuffer(env, batch, null)
}
// viewport is weird because it can affect context vars
if (args.state.viewport && args.state.viewport.propDep) {
contextDynamic = true
}
function isInnerDefn (defn) {
return (defn.contextDep && contextDynamic) || defn.propDep
}
// set webgl options
emitPollState(env, batch, args)
emitSetOptions(env, batch, args.state, function (defn) {
return !isInnerDefn(defn)
})
if (!args.profile || !isInnerDefn(args.profile)) {
emitProfile(env, batch, args, false, 'a1')
}
// Save these values to args so that the batch body routine can use them
args.contextDep = contextDynamic
args.needsContext = needsContext
args.needsFramebuffer = needsFramebuffer
// determine if shader is dynamic
var progDefn = args.shader.progVar
if ((progDefn.contextDep && contextDynamic) || progDefn.propDep) {
emitBatchBody(
env,
batch,
args,
null)
} else {
var PROGRAM = progDefn.append(env, batch)
batch(env.shared.gl, '.useProgram(', PROGRAM, '.program);')
if (args.shader.program) {
emitBatchBody(
env,
batch,
args,
args.shader.program)
} else {
var batchCache = env.global.def('{}')
var PROG_ID = batch.def(PROGRAM, '.id')
var CACHED_PROC = batch.def(batchCache, '[', PROG_ID, ']')
batch(
env.cond(CACHED_PROC)
.then(CACHED_PROC, '.call(this,a0,a1);')
.else(
CACHED_PROC, '=', batchCache, '[', PROG_ID, ']=',
env.link(function (program) {
return createBody(emitBatchBody, env, args, program, 2)
}), '(', PROGRAM, ');',
CACHED_PROC, '.call(this,a0,a1);'))
}
}
if (Object.keys(args.state).length > 0) {
batch(env.shared.current, '.dirty=true;')
}
}
// ===================================================
// ===================================================
// SCOPE COMMAND
// ===================================================
// ===================================================
function emitScopeProc (env, args) {
var scope = env.proc('scope', 3)
env.batchId = 'a2'
var shared = env.shared
var CURRENT_STATE = shared.current
emitContext(env, scope, args.context)
if (args.framebuffer) {
args.framebuffer.append(env, scope)
}
sortState(Object.keys(args.state)).forEach(function (name) {
var defn = args.state[name]
var value = defn.append(env, scope)
if (isArrayLike(value)) {
value.forEach(function (v, i) {
scope.set(env.next[name], '[' + i + ']', v)
})
} else {
scope.set(shared.next, '.' + name, value)
}
})
emitProfile(env, scope, args, true, true)
;[S_ELEMENTS, S_OFFSET, S_COUNT, S_INSTANCES, S_PRIMITIVE].forEach(
function (opt) {
var variable = args.draw[opt]
if (!variable) {
return
}
scope.set(shared.draw, '.' + opt, '' + variable.append(env, scope))
})
Object.keys(args.uniforms).forEach(function (opt) {
scope.set(
shared.uniforms,
'[' + stringStore.id(opt) + ']',
args.uniforms[opt].append(env, scope))
})
Object.keys(args.attributes).forEach(function (name) {
var record = args.attributes[name].append(env, scope)
var scopeAttrib = env.scopeAttrib(name)
Object.keys(new AttributeRecord()).forEach(function (prop) {
scope.set(scopeAttrib, '.' + prop, record[prop])
})
})
function saveShader (name) {
var shader = args.shader[name]
if (shader) {
scope.set(shared.shader, '.' + name, shader.append(env, scope))
}
}
saveShader(S_VERT)
saveShader(S_FRAG)
if (Object.keys(args.state).length > 0) {
scope(CURRENT_STATE, '.dirty=true;')
scope.exit(CURRENT_STATE, '.dirty=true;')
}
scope('a1(', env.shared.context, ',a0,', env.batchId, ');')
}
function isDynamicObject (object) {
if (typeof object !== 'object' || isArrayLike(object)) {
return
}
var props = Object.keys(object)
for (var i = 0; i < props.length; ++i) {
if (dynamic.isDynamic(object[props[i]])) {
return true
}
}
return false
}
function splatObject (env, options, name) {
var object = options.static[name]
if (!object || !isDynamicObject(object)) {
return
}
var globals = env.global
var keys = Object.keys(object)
var thisDep = false
var contextDep = false
var propDep = false
var objectRef = env.global.def('{}')
keys.forEach(function (key) {
var value = object[key]
if (dynamic.isDynamic(value)) {
if (typeof value === 'function') {
value = object[key] = dynamic.unbox(value)
}
var deps = createDynamicDecl(value, null)
thisDep = thisDep || deps.thisDep
propDep = propDep || deps.propDep
contextDep = contextDep || deps.contextDep
} else {
globals(objectRef, '.', key, '=')
switch (typeof value) {
case 'number':
globals(value)
break
case 'string':
globals('"', value, '"')
break
case 'object':
if (Array.isArray(value)) {
globals('[', value.join(), ']')
}
break
default:
globals(env.link(value))
break
}
globals(';')
}
})
function appendBlock (env, block) {
keys.forEach(function (key) {
var value = object[key]
if (!dynamic.isDynamic(value)) {
return
}
var ref = env.invoke(block, value)
block(objectRef, '.', key, '=', ref, ';')
})
}
options.dynamic[name] = new dynamic.DynamicVariable(DYN_THUNK, {
thisDep: thisDep,
contextDep: contextDep,
propDep: propDep,
ref: objectRef,
append: appendBlock
})
delete options.static[name]
}
// ===========================================================================
// ===========================================================================
// MAIN DRAW COMMAND
// ===========================================================================
// ===========================================================================
function compileCommand (options, attributes, uniforms, context, stats) {
var env = createREGLEnvironment()
// link stats, so that we can easily access it in the program.
env.stats = env.link(stats)
// splat options and attributes to allow for dynamic nested properties
Object.keys(attributes.static).forEach(function (key) {
splatObject(env, attributes, key)
})
NESTED_OPTIONS.forEach(function (name) {
splatObject(env, options, name)
})
var args = parseArguments(options, attributes, uniforms, context, env)
emitDrawProc(env, args)
emitScopeProc(env, args)
emitBatchProc(env, args)
return env.compile()
}
// ===========================================================================
// ===========================================================================
// POLL / REFRESH
// ===========================================================================
// ===========================================================================
return {
next: nextState,
current: currentState,
procs: (function () {
var env = createREGLEnvironment()
var poll = env.proc('poll')
var refresh = env.proc('refresh')
var common = env.block()
poll(common)
refresh(common)
var shared = env.shared
var GL = shared.gl
var NEXT_STATE = shared.next
var CURRENT_STATE = shared.current
common(CURRENT_STATE, '.dirty=false;')
emitPollFramebuffer(env, poll)
emitPollFramebuffer(env, refresh, null, true)
// Refresh updates all attribute state changes
var extInstancing = gl.getExtension('angle_instanced_arrays')
var INSTANCING
if (extInstancing) {
INSTANCING = env.link(extInstancing)
}
for (var i = 0; i < limits.maxAttributes; ++i) {
var BINDING = refresh.def(shared.attributes, '[', i, ']')
var ifte = env.cond(BINDING, '.buffer')
ifte.then(
GL, '.enableVertexAttribArray(', i, ');',
GL, '.bindBuffer(',
GL_ARRAY_BUFFER, ',',
BINDING, '.buffer.buffer);',
GL, '.vertexAttribPointer(',
i, ',',
BINDING, '.size,',
BINDING, '.type,',
BINDING, '.normalized,',
BINDING, '.stride,',
BINDING, '.offset);'
).else(
GL, '.disableVertexAttribArray(', i, ');',
GL, '.vertexAttrib4f(',
i, ',',
BINDING, '.x,',
BINDING, '.y,',
BINDING, '.z,',
BINDING, '.w);',
BINDING, '.buffer=null;')
refresh(ifte)
if (extInstancing) {
refresh(
INSTANCING, '.vertexAttribDivisorANGLE(',
i, ',',
BINDING, '.divisor);')
}
}
Object.keys(GL_FLAGS).forEach(function (flag) {
var cap = GL_FLAGS[flag]
var NEXT = common.def(NEXT_STATE, '.', flag)
var block = env.block()
block('if(', NEXT, '){',
GL, '.enable(', cap, ')}else{',
GL, '.disable(', cap, ')}',
CURRENT_STATE, '.', flag, '=', NEXT, ';')
refresh(block)
poll(
'if(', NEXT, '!==', CURRENT_STATE, '.', flag, '){',
block,
'}')
})
Object.keys(GL_VARIABLES).forEach(function (name) {
var func = GL_VARIABLES[name]
var init = currentState[name]
var NEXT, CURRENT
var block = env.block()
block(GL, '.', func, '(')
if (isArrayLike(init)) {
var n = init.length
NEXT = env.global.def(NEXT_STATE, '.', name)
CURRENT = env.global.def(CURRENT_STATE, '.', name)
block(
loop(n, function (i) {
return NEXT + '[' + i + ']'
}), ');',
loop(n, function (i) {
return CURRENT + '[' + i + ']=' + NEXT + '[' + i + '];'
}).join(''))
poll(
'if(', loop(n, function (i) {
return NEXT + '[' + i + ']!==' + CURRENT + '[' + i + ']'
}).join('||'), '){',
block,
'}')
} else {
NEXT = common.def(NEXT_STATE, '.', name)
CURRENT = common.def(CURRENT_STATE, '.', name)
block(
NEXT, ');',
CURRENT_STATE, '.', name, '=', NEXT, ';')
poll(
'if(', NEXT, '!==', CURRENT, '){',
block,
'}')
}
refresh(block)
})
return env.compile()
})(),
compile: compileCommand
}
}
},{"./constants/dtypes.json":4,"./constants/primitives.json":5,"./dynamic":8,"./util/check":20,"./util/codegen":22,"./util/is-array-like":24,"./util/is-ndarray":25,"./util/is-typed-array":26,"./util/loop":27}],8:[function(require,module,exports){
var VARIABLE_COUNTER = 0
var DYN_FUNC = 0
function DynamicVariable (type, data) {
this.id = (VARIABLE_COUNTER++)
this.type = type
this.data = data
}
function escapeStr (str) {
return str.replace(/\\/g, '\\\\').replace(/"/g, '\\"')
}
function splitParts (str) {
if (str.length === 0) {
return []
}
var firstChar = str.charAt(0)
var lastChar = str.charAt(str.length - 1)
if (str.length > 1 &&
firstChar === lastChar &&
(firstChar === '"' || firstChar === "'")) {
return ['"' + escapeStr(str.substr(1, str.length - 2)) + '"']
}
var parts = /\[(false|true|null|\d+|'[^']*'|"[^"]*")\]/.exec(str)
if (parts) {
return (
splitParts(str.substr(0, parts.index))
.concat(splitParts(parts[1]))
.concat(splitParts(str.substr(parts.index + parts[0].length)))
)
}
var subparts = str.split('.')
if (subparts.length === 1) {
return ['"' + escapeStr(str) + '"']
}
var result = []
for (var i = 0; i < subparts.length; ++i) {
result = result.concat(splitParts(subparts[i]))
}
return result
}
function toAccessorString (str) {
return '[' + splitParts(str).join('][') + ']'
}
function defineDynamic (type, data) {
return new DynamicVariable(type, toAccessorString(data + ''))
}
function isDynamic (x) {
return (typeof x === 'function' && !x._reglType) ||
x instanceof DynamicVariable
}
function unbox (x, path) {
if (typeof x === 'function') {
return new DynamicVariable(DYN_FUNC, x)
}
return x
}
module.exports = {
DynamicVariable: DynamicVariable,
define: defineDynamic,
isDynamic: isDynamic,
unbox: unbox,
accessor: toAccessorString
}
},{}],9:[function(require,module,exports){
var check = require('./util/check')
var isTypedArray = require('./util/is-typed-array')
var isNDArrayLike = require('./util/is-ndarray')
var values = require('./util/values')
var primTypes = require('./constants/primitives.json')
var usageTypes = require('./constants/usage.json')
var GL_POINTS = 0
var GL_LINES = 1
var GL_TRIANGLES = 4
var GL_BYTE = 5120
var GL_UNSIGNED_BYTE = 5121
var GL_SHORT = 5122
var GL_UNSIGNED_SHORT = 5123
var GL_INT = 5124
var GL_UNSIGNED_INT = 5125
var GL_ELEMENT_ARRAY_BUFFER = 34963
var GL_STREAM_DRAW = 0x88E0
var GL_STATIC_DRAW = 0x88E4
module.exports = function wrapElementsState (gl, extensions, bufferState, stats) {
var elementSet = {}
var elementCount = 0
var elementTypes = {
'uint8': GL_UNSIGNED_BYTE,
'uint16': GL_UNSIGNED_SHORT
}
if (extensions.oes_element_index_uint) {
elementTypes.uint32 = GL_UNSIGNED_INT
}
function REGLElementBuffer (buffer) {
this.id = elementCount++
elementSet[this.id] = this
this.buffer = buffer
this.primType = GL_TRIANGLES
this.vertCount = 0
this.type = 0
}
REGLElementBuffer.prototype.bind = function () {
this.buffer.bind()
}
var bufferPool = []
function createElementStream (data) {
var result = bufferPool.pop()
if (!result) {
result = new REGLElementBuffer(bufferState.create(
null,
GL_ELEMENT_ARRAY_BUFFER,
true,
false)._buffer)
}
initElements(result, data, GL_STREAM_DRAW, -1, -1, 0, 0)
return result
}
function destroyElementStream (elements) {
bufferPool.push(elements)
}
function initElements (
elements,
data,
usage,
prim,
count,
byteLength,
type) {
var predictedType = type
if (!type && (
!isTypedArray(data) ||
(isNDArrayLike(data) && !isTypedArray(data.data)))) {
predictedType = extensions.oes_element_index_uint
? GL_UNSIGNED_INT
: GL_UNSIGNED_SHORT
}
elements.buffer.bind()
bufferState._initBuffer(
elements.buffer,
data,
usage,
predictedType,
3)
var dtype = type
if (!type) {
switch (elements.buffer.dtype) {
case GL_UNSIGNED_BYTE:
case GL_BYTE:
dtype = GL_UNSIGNED_BYTE
break
case GL_UNSIGNED_SHORT:
case GL_SHORT:
dtype = GL_UNSIGNED_SHORT
break
case GL_UNSIGNED_INT:
case GL_INT:
dtype = GL_UNSIGNED_INT
break
default:
check.raise('unsupported type for element array')
}
elements.buffer.dtype = dtype
}
elements.type = dtype
// Check oes_element_index_uint extension
check(
dtype !== GL_UNSIGNED_INT ||
!!extensions.oes_element_index_uint,
'32 bit element buffers not supported, enable oes_element_index_uint first')
// try to guess default primitive type and arguments
var vertCount = count
if (vertCount < 0) {
vertCount = elements.buffer.byteLength
if (dtype === GL_UNSIGNED_SHORT) {
vertCount >>= 1
} else if (dtype === GL_UNSIGNED_INT) {
vertCount >>= 2
}
}
elements.vertCount = vertCount
// try to guess primitive type from cell dimension
var primType = prim
if (prim < 0) {
primType = GL_TRIANGLES
var dimension = elements.buffer.dimension
if (dimension === 1) primType = GL_POINTS
if (dimension === 2) primType = GL_LINES
if (dimension === 3) primType = GL_TRIANGLES
}
elements.primType = primType
}
function destroyElements (elements) {
stats.elementsCount--
check(elements.buffer !== null, 'must not double destroy elements')
delete elementSet[elements.id]
elements.buffer.destroy()
elements.buffer = null
}
function createElements (options, persistent) {
var buffer = bufferState.create(null, GL_ELEMENT_ARRAY_BUFFER, true)
var elements = new REGLElementBuffer(buffer._buffer)
stats.elementsCount++
function reglElements (options) {
if (!options) {
buffer()
elements.primType = GL_TRIANGLES
elements.vertCount = 0
elements.type = GL_UNSIGNED_BYTE
} else if (typeof options === 'number') {
buffer(options)
elements.primType = GL_TRIANGLES
elements.vertCount = options | 0
elements.type = GL_UNSIGNED_BYTE
} else {
var data = null
var usage = GL_STATIC_DRAW
var primType = -1
var vertCount = -1
var byteLength = 0
var dtype = 0
if (Array.isArray(options) ||
isTypedArray(options) ||
isNDArrayLike(options)) {
data = options
} else {
check.type(options, 'object', 'invalid arguments for elements')
if ('data' in options) {
data = options.data
check(
Array.isArray(data) ||
isTypedArray(data) ||
isNDArrayLike(data),
'invalid data for element buffer')
}
if ('usage' in options) {
check.parameter(
options.usage,
usageTypes,
'invalid element buffer usage')
usage = usageTypes[options.usage]
}
if ('primitive' in options) {
check.parameter(
options.primitive,
primTypes,
'invalid element buffer primitive')
primType = primTypes[options.primitive]
}
if ('count' in options) {
check(
typeof options.count === 'number' && options.count >= 0,
'invalid vertex count for elements')
vertCount = options.count | 0
}
if ('length' in options) {
byteLength = options.length | 0
}
if ('type' in options) {
check.parameter(
options.type,
elementTypes,
'invalid buffer type')
dtype = elementTypes[options.type]
}
}
if (data) {
initElements(
elements,
data,
usage,
primType,
vertCount,
byteLength,
dtype)
} else {
var _buffer = elements.buffer
_buffer.bind()
gl.bufferData(GL_ELEMENT_ARRAY_BUFFER, byteLength, usage)
_buffer.dtype = dtype || GL_UNSIGNED_BYTE
_buffer.usage = usage
_buffer.dimension = 3
_buffer.byteLength = byteLength
elements.primType = primType < 0 ? GL_TRIANGLES : primType
elements.vertCount = vertCount < 0 ? 0 : vertCount
elements.type = _buffer.dtype
}
}
return reglElements
}
reglElements(options)
reglElements._reglType = 'elements'
reglElements._elements = elements
reglElements.subdata = function (data, offset) {
buffer.subdata(data, offset)
return reglElements
}
reglElements.destroy = function () {
destroyElements(elements)
}
return reglElements
}
return {
create: createElements,
createStream: createElementStream,
destroyStream: destroyElementStream,
getElements: function (elements) {
if (typeof elements === 'function' &&
elements._elements instanceof REGLElementBuffer) {
return elements._elements
}
return null
},
clear: function () {
values(elementSet).forEach(destroyElements)
}
}
}
},{"./constants/primitives.json":5,"./constants/usage.json":6,"./util/check":20,"./util/is-ndarray":25,"./util/is-typed-array":26,"./util/values":31}],10:[function(require,module,exports){
var check = require('./util/check')
module.exports = function createExtensionCache (gl, config) {
var extensions = {}
function tryLoadExtension (name_) {
check.type(name_, 'string', 'extension name must be string')
var name = name_.toLowerCase()
var ext
try {
ext = extensions[name] = gl.getExtension(name)
} catch (e) {}
return !!ext
}
for (var i = 0; i < config.extensions.length; ++i) {
var name = config.extensions[i]
if (!tryLoadExtension(name)) {
config.onDestroy()
config.onDone('"' + name + '" extension is not supported by the current WebGL context, try upgrading your system or a different browser')
return null
}
}
config.optionalExtensions.forEach(tryLoadExtension)
return {
extensions: extensions,
restore: function () {
Object.keys(extensions).forEach(function (name) {
if (!tryLoadExtension(name)) {
throw new Error('(regl): error restoring extension ' + name)
}
})
}
}
}
},{"./util/check":20}],11:[function(require,module,exports){
var check = require('./util/check')
var values = require('./util/values')
var extend = require('./util/extend')
// We store these constants so that the minifier can inline them
var GL_FRAMEBUFFER = 0x8D40
var GL_RENDERBUFFER = 0x8D41
var GL_TEXTURE_2D = 0x0DE1
var GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515
var GL_COLOR_ATTACHMENT0 = 0x8CE0
var GL_DEPTH_ATTACHMENT = 0x8D00
var GL_STENCIL_ATTACHMENT = 0x8D20
var GL_DEPTH_STENCIL_ATTACHMENT = 0x821A
var GL_FRAMEBUFFER_COMPLETE = 0x8CD5
var GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT = 0x8CD6
var GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7
var GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS = 0x8CD9
var GL_FRAMEBUFFER_UNSUPPORTED = 0x8CDD
var GL_HALF_FLOAT_OES = 0x8D61
var GL_UNSIGNED_BYTE = 0x1401
var GL_FLOAT = 0x1406
var GL_RGBA = 0x1908
var GL_DEPTH_COMPONENT = 0x1902
var colorTextureFormatEnums = [
GL_RGBA
]
// for every texture format, store
// the number of channels
var textureFormatChannels = []
textureFormatChannels[GL_RGBA] = 4
// for every texture type, store
// the size in bytes.
var textureTypeSizes = []
textureTypeSizes[GL_UNSIGNED_BYTE] = 1
textureTypeSizes[GL_FLOAT] = 4
textureTypeSizes[GL_HALF_FLOAT_OES] = 2
var GL_RGBA4 = 0x8056
var GL_RGB5_A1 = 0x8057
var GL_RGB565 = 0x8D62
var GL_DEPTH_COMPONENT16 = 0x81A5
var GL_STENCIL_INDEX8 = 0x8D48
var GL_DEPTH_STENCIL = 0x84F9
var GL_SRGB8_ALPHA8_EXT = 0x8C43
var GL_RGBA32F_EXT = 0x8814
var GL_RGBA16F_EXT = 0x881A
var GL_RGB16F_EXT = 0x881B
var colorRenderbufferFormatEnums = [
GL_RGBA4,
GL_RGB5_A1,
GL_RGB565,
GL_SRGB8_ALPHA8_EXT,
GL_RGBA16F_EXT,
GL_RGB16F_EXT,
GL_RGBA32F_EXT
]
var statusCode = {}
statusCode[GL_FRAMEBUFFER_COMPLETE] = 'complete'
statusCode[GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT] = 'incomplete attachment'
statusCode[GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS] = 'incomplete dimensions'
statusCode[GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT] = 'incomplete, missing attachment'
statusCode[GL_FRAMEBUFFER_UNSUPPORTED] = 'unsupported'
module.exports = function wrapFBOState (
gl,
extensions,
limits,
textureState,
renderbufferState,
stats) {
var framebufferState = {
cur: null,
next: null,
dirty: false
}
var colorTextureFormats = ['rgba']
var colorRenderbufferFormats = ['rgba4', 'rgb565', 'rgb5 a1']
if (extensions.ext_srgb) {
colorRenderbufferFormats.push('srgba')
}
if (extensions.ext_color_buffer_half_float) {
colorRenderbufferFormats.push('rgba16f', 'rgb16f')
}
if (extensions.webgl_color_buffer_float) {
colorRenderbufferFormats.push('rgba32f')
}
var colorTypes = ['uint8']
if (extensions.oes_texture_half_float) {
colorTypes.push('half float', 'float16')
}
if (extensions.oes_texture_float) {
colorTypes.push('float', 'float32')
}
function FramebufferAttachment (target, texture, renderbuffer) {
this.target = target
this.texture = texture
this.renderbuffer = renderbuffer
var w = 0
var h = 0
if (texture) {
w = texture.width
h = texture.height
} else if (renderbuffer) {
w = renderbuffer.width
h = renderbuffer.height
}
this.width = w
this.height = h
}
function decRef (attachment) {
if (attachment) {
if (attachment.texture) {
attachment.texture._texture.decRef()
}
if (attachment.renderbuffer) {
attachment.renderbuffer._renderbuffer.decRef()
}
}
}
function incRefAndCheckShape (attachment, width, height) {
if (!attachment) {
return
}
if (attachment.texture) {
var texture = attachment.texture._texture
var tw = Math.max(1, texture.width)
var th = Math.max(1, texture.height)
check(tw === width && th === height,
'inconsistent width/height for supplied texture')
texture.refCount += 1
} else {
var renderbuffer = attachment.renderbuffer._renderbuffer
check(
renderbuffer.width === width && renderbuffer.height === height,
'inconsistent width/height for renderbuffer')
renderbuffer.refCount += 1
}
}
function attach (location, attachment) {
if (attachment) {
if (attachment.texture) {
gl.framebufferTexture2D(
GL_FRAMEBUFFER,
location,
attachment.target,
attachment.texture._texture.texture,
0)
} else {
gl.framebufferRenderbuffer(
GL_FRAMEBUFFER,
location,
GL_RENDERBUFFER,
attachment.renderbuffer._renderbuffer.renderbuffer)
}
} else {
gl.framebufferTexture2D(
GL_FRAMEBUFFER,
location,
GL_TEXTURE_2D,
null,
0)
}
}
function parseAttachment (attachment) {
var target = GL_TEXTURE_2D
var texture = null
var renderbuffer = null
var data = attachment
if (typeof attachment === 'object') {
data = attachment.data
if ('target' in attachment) {
target = attachment.target | 0
}
}
check.type(data, 'function', 'invalid attachment data')
var type = data._reglType
if (type === 'texture2d') {
texture = data
check(target === GL_TEXTURE_2D)
} else if (type === 'textureCube') {
texture = data
check(
target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
target < GL_TEXTURE_CUBE_MAP_POSITIVE_X + 6,
'invalid cube map target')
} else if (type === 'renderbuffer') {
renderbuffer = data
target = GL_RENDERBUFFER
} else {
check.raise('invalid regl object for attachment')
}
return new FramebufferAttachment(target, texture, renderbuffer)
}
function allocAttachment (
width,
height,
isTexture,
format,
type) {
if (isTexture) {
var texture = textureState.create2D({
width: width,
height: height,
format: format,
type: type
})
texture._texture.refCount = 0
return new FramebufferAttachment(GL_TEXTURE_2D, texture, null)
} else {
var rb = renderbufferState.create({
width: width,
height: height,
format: format
})
rb._renderbuffer.refCount = 0
return new FramebufferAttachment(GL_RENDERBUFFER, null, rb)
}
}
function unwrapAttachment (attachment) {
return attachment && (attachment.texture || attachment.renderbuffer)
}
function resizeAttachment (attachment, w, h) {
if (attachment) {
if (attachment.texture) {
attachment.texture.resize(w, h)
} else if (attachment.renderbuffer) {
attachment.renderbuffer.resize(w, h)
}
}
}
var framebufferCount = 0
var framebufferSet = {}
function REGLFramebuffer () {
this.id = framebufferCount++
framebufferSet[this.id] = this
this.framebuffer = gl.createFramebuffer()
this.width = 0
this.height = 0
this.colorAttachments = []
this.depthAttachment = null
this.stencilAttachment = null
this.depthStencilAttachment = null
}
function decFBORefs (framebuffer) {
framebuffer.colorAttachments.forEach(decRef)
decRef(framebuffer.depthAttachment)
decRef(framebuffer.stencilAttachment)
decRef(framebuffer.depthStencilAttachment)
}
function destroy (framebuffer) {
var handle = framebuffer.framebuffer
check(handle, 'must not double destroy framebuffer')
gl.deleteFramebuffer(handle)
framebuffer.framebuffer = null
stats.framebufferCount--
delete framebufferSet[framebuffer.id]
}
function updateFramebuffer (framebuffer) {
var i
gl.bindFramebuffer(GL_FRAMEBUFFER, framebuffer.framebuffer)
var colorAttachments = framebuffer.colorAttachments
for (i = 0; i < colorAttachments.length; ++i) {
attach(GL_COLOR_ATTACHMENT0 + i, colorAttachments[i])
}
for (i = colorAttachments.length; i < limits.maxColorAttachments; ++i) {
attach(GL_COLOR_ATTACHMENT0 + i, null)
}
attach(GL_DEPTH_ATTACHMENT, framebuffer.depthAttachment)
attach(GL_STENCIL_ATTACHMENT, framebuffer.stencilAttachment)
attach(GL_DEPTH_STENCIL_ATTACHMENT, framebuffer.depthStencilAttachment)
// Check status code
var status = gl.checkFramebufferStatus(GL_FRAMEBUFFER)
if (status !== GL_FRAMEBUFFER_COMPLETE) {
check.raise('framebuffer configuration not supported, status = ' +
statusCode[status])
}
gl.bindFramebuffer(GL_FRAMEBUFFER, framebufferState.next)
framebufferState.cur = framebufferState.next
// FIXME: Clear error code here. This is a work around for a bug in
// headless-gl
gl.getError()
}
function createFBO (a0, a1) {
var framebuffer = new REGLFramebuffer()
stats.framebufferCount++
function reglFramebuffer (a, b) {
var i
check(framebufferState.next !== framebuffer,
'can not update framebuffer which is currently in use')
var extDrawBuffers = extensions.webgl_draw_buffers
var width = 0
var height = 0
var needsDepth = true
var needsStencil = true
var colorBuffer = null
var colorTexture = true
var colorFormat = 'rgba'
var colorType = 'uint8'
var colorCount = 1
var depthBuffer = null
var stencilBuffer = null
var depthStencilBuffer = null
var depthStencilTexture = false
if (typeof a === 'number') {
width = a | 0
height = (b | 0) || width
} else if (!a) {
width = height = 1
} else {
check.type(a, 'object', 'invalid arguments for framebuffer')
var options = a
if ('shape' in options) {
var shape = options.shape
check(Array.isArray(shape) && shape.length >= 2,
'invalid shape for framebuffer')
width = shape[0]
height = shape[1]
} else {
if ('radius' in options) {
width = height = options.radius
}
if ('width' in options) {
width = options.width
}
if ('height' in options) {
height = options.height
}
}
if ('color' in options ||
'colors' in options) {
colorBuffer =
options.color ||
options.colors
if (Array.isArray(colorBuffer)) {
check(
colorBuffer.length === 1 || extDrawBuffers,
'multiple render targets not supported')
}
}
if (!colorBuffer) {
if ('colorCount' in options) {
colorCount = options.colorCount | 0
check(colorCount > 0, 'invalid color buffer count')
}
if ('colorTexture' in options) {
colorTexture = !!options.colorTexture
colorFormat = 'rgba4'
}
if ('colorType' in options) {
colorType = options.colorType
if (!colorTexture) {
if (colorType === 'half float' || colorType === 'float16') {
check(extensions.ext_color_buffer_half_float,
'you must enable EXT_color_buffer_half_float to use 16-bit render buffers')
colorFormat = 'rgba16f'
} else if (colorType === 'float' || colorType === 'float32') {
check(extensions.webgl_color_buffer_float,
'you must enable WEBGL_color_buffer_float in order to use 32-bit floating point renderbuffers')
colorFormat = 'rgba32f'
}
} else {
check(extensions.oes_texture_float ||
!(colorType === 'float' || colorType === 'float32'),
'you must enable OES_texture_float in order to use floating point framebuffer objects')
check(extensions.oes_texture_half_float ||
!(colorType === 'half float' || colorType === 'float16'),
'you must enable OES_texture_half_float in order to use 16-bit floating point framebuffer objects')
}
check.oneOf(colorType, colorTypes, 'invalid color type')
}
if ('colorFormat' in options) {
colorFormat = options.colorFormat
if (colorTextureFormats.indexOf(colorFormat) >= 0) {
colorTexture = true
} else if (colorRenderbufferFormats.indexOf(colorFormat) >= 0) {
colorTexture = false
} else {
if (colorTexture) {
check.oneOf(
options.colorFormat, colorTextureFormats,
'invalid color format for texture')
} else {
check.oneOf(
options.colorFormat, colorRenderbufferFormats,
'invalid color format for renderbuffer')
}
}
}
}
if ('depthTexture' in options || 'depthStencilTexture' in options) {
depthStencilTexture = !!(options.depthTexture ||
options.depthStencilTexture)
check(!depthStencilTexture || extensions.webgl_depth_texture,
'webgl_depth_texture extension not supported')
}
if ('depth' in options) {
if (typeof options.depth === 'boolean') {
needsDepth = options.depth
} else {
depthBuffer = options.depth
needsStencil = false
}
}
if ('stencil' in options) {
if (typeof options.stencil === 'boolean') {
needsStencil = options.stencil
} else {
stencilBuffer = options.stencil
needsDepth = false
}
}
if ('depthStencil' in options) {
if (typeof options.depthStencil === 'boolean') {
needsDepth = needsStencil = options.depthStencil
} else {
depthStencilBuffer = options.depthStencil
needsDepth = false
needsStencil = false
}
}
}
// parse attachments
var colorAttachments = null
var depthAttachment = null
var stencilAttachment = null
var depthStencilAttachment = null
// Set up color attachments
if (Array.isArray(colorBuffer)) {
colorAttachments = colorBuffer.map(parseAttachment)
} else if (colorBuffer) {
colorAttachments = [parseAttachment(colorBuffer)]
} else {
colorAttachments = new Array(colorCount)
for (i = 0; i < colorCount; ++i) {
colorAttachments[i] = allocAttachment(
width,
height,
colorTexture,
colorFormat,
colorType)
}
}
check(extensions.webgl_draw_buffers || colorAttachments.length <= 1,
'you must enable the WEBGL_draw_buffers extension in order to use multiple color buffers.')
check(colorAttachments.length <= limits.maxColorAttachments,
'too many color attachments, not supported')
width = width || colorAttachments[0].width
height = height || colorAttachments[0].height
if (depthBuffer) {
depthAttachment = parseAttachment(depthBuffer)
} else if (needsDepth && !needsStencil) {
depthAttachment = allocAttachment(
width,
height,
depthStencilTexture,
'depth',
'uint32')
}
if (stencilBuffer) {
stencilAttachment = parseAttachment(stencilBuffer)
} else if (needsStencil && !needsDepth) {
stencilAttachment = allocAttachment(
width,
height,
false,
'stencil',
'uint8')
}
if (depthStencilBuffer) {
depthStencilAttachment = parseAttachment(depthStencilBuffer)
} else if (!depthBuffer && !stencilBuffer && needsStencil && needsDepth) {
depthStencilAttachment = allocAttachment(
width,
height,
depthStencilTexture,
'depth stencil',
'depth stencil')
}
check(
(!!depthBuffer) + (!!stencilBuffer) + (!!depthStencilBuffer) <= 1,
'invalid framebuffer configuration, can specify exactly one depth/stencil attachment')
var commonColorAttachmentSize = null
for (i = 0; i < colorAttachments.length; ++i) {
incRefAndCheckShape(colorAttachments[i], width, height)
check(!colorAttachments[i] ||
(colorAttachments[i].texture &&
colorTextureFormatEnums.indexOf(colorAttachments[i].texture._texture.format) >= 0) ||
(colorAttachments[i].renderbuffer &&
colorRenderbufferFormatEnums.indexOf(colorAttachments[i].renderbuffer._renderbuffer.format) >= 0),
'framebuffer color attachment ' + i + ' is invalid')
if (colorAttachments[i] && colorAttachments[i].texture) {
var colorAttachmentSize =
textureFormatChannels[colorAttachments[i].texture._texture.format] *
textureTypeSizes[colorAttachments[i].texture._texture.type]
if (commonColorAttachmentSize === null) {
commonColorAttachmentSize = colorAttachmentSize
} else {
// We need to make sure that all color attachments have the same number of bitplanes
// (that is, the same numer of bits per pixel)
// This is required by the GLES2.0 standard. See the beginning of Chapter 4 in that document.
check(commonColorAttachmentSize === colorAttachmentSize,
'all color attachments much have the same number of bits per pixel.')
}
}
}
incRefAndCheckShape(depthAttachment, width, height)
check(!depthAttachment ||
(depthAttachment.texture &&
depthAttachment.texture._texture.format === GL_DEPTH_COMPONENT) ||
(depthAttachment.renderbuffer &&
depthAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_COMPONENT16),
'invalid depth attachment for framebuffer object')
incRefAndCheckShape(stencilAttachment, width, height)
check(!stencilAttachment ||
(stencilAttachment.renderbuffer &&
stencilAttachment.renderbuffer._renderbuffer.format === GL_STENCIL_INDEX8),
'invalid stencil attachment for framebuffer object')
incRefAndCheckShape(depthStencilAttachment, width, height)
check(!depthStencilAttachment ||
(depthStencilAttachment.texture &&
depthStencilAttachment.texture._texture.format === GL_DEPTH_STENCIL) ||
(depthStencilAttachment.renderbuffer &&
depthStencilAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_STENCIL),
'invalid depth-stencil attachment for framebuffer object')
// decrement references
decFBORefs(framebuffer)
framebuffer.width = width
framebuffer.height = height
framebuffer.colorAttachments = colorAttachments
framebuffer.depthAttachment = depthAttachment
framebuffer.stencilAttachment = stencilAttachment
framebuffer.depthStencilAttachment = depthStencilAttachment
reglFramebuffer.color = colorAttachments.map(unwrapAttachment)
reglFramebuffer.depth = unwrapAttachment(depthAttachment)
reglFramebuffer.stencil = unwrapAttachment(stencilAttachment)
reglFramebuffer.depthStencil = unwrapAttachment(depthStencilAttachment)
reglFramebuffer.width = framebuffer.width
reglFramebuffer.height = framebuffer.height
updateFramebuffer(framebuffer)
return reglFramebuffer
}
function resize (w_, h_) {
check(framebufferState.next !== framebuffer,
'can not resize a framebuffer which is currently in use')
var w = w_ | 0
var h = (h_ | 0) || w
if (w === framebuffer.width && h === framebuffer.height) {
return reglFramebuffer
}
// resize all buffers
var colorAttachments = framebuffer.colorAttachments
for (var i = 0; i < colorAttachments.length; ++i) {
resizeAttachment(colorAttachments[i], w, h)
}
resizeAttachment(framebuffer.depthAttachment, w, h)
resizeAttachment(framebuffer.stencilAttachment, w, h)
resizeAttachment(framebuffer.depthStencilAttachment, w, h)
framebuffer.width = reglFramebuffer.width = w
framebuffer.height = reglFramebuffer.height = h
updateFramebuffer(framebuffer)
return reglFramebuffer
}
reglFramebuffer(a0, a1)
return extend(reglFramebuffer, {
resize: resize,
_reglType: 'framebuffer',
_framebuffer: framebuffer,
destroy: function () {
destroy(framebuffer)
decFBORefs(framebuffer)
}
})
}
function createCubeFBO (options) {
var faces = Array(6)
function reglFramebufferCube (a) {
var i
check(faces.indexOf(framebufferState.next) < 0,
'can not update framebuffer which is currently in use')
var extDrawBuffers = extensions.webgl_draw_buffers
var params = {
color: null
}
var radius = 0
var colorBuffer = null
var colorFormat = 'rgba'
var colorType = 'uint8'
var colorCount = 1
if (typeof a === 'number') {
radius = a | 0
} else if (!a) {
radius = 1
} else {
check.type(a, 'object', 'invalid arguments for framebuffer')
var options = a
if ('shape' in options) {
var shape = options.shape
check(
Array.isArray(shape) && shape.length >= 2,
'invalid shape for framebuffer')
check(
shape[0] === shape[1],
'cube framebuffer must be square')
radius = shape[0]
} else {
if ('radius' in options) {
radius = options.radius | 0
}
if ('width' in options) {
radius = options.width | 0
if ('height' in options) {
check(options.height === radius, 'must be square')
}
} else if ('height' in options) {
radius = options.height | 0
}
}
if ('color' in options ||
'colors' in options) {
colorBuffer =
options.color ||
options.colors
if (Array.isArray(colorBuffer)) {
check(
colorBuffer.length === 1 || extDrawBuffers,
'multiple render targets not supported')
}
}
if (!colorBuffer) {
if ('colorCount' in options) {
colorCount = options.colorCount | 0
check(colorCount > 0, 'invalid color buffer count')
}
if ('colorType' in options) {
check.oneOf(
options.colorType, colorTypes,
'invalid color type')
colorType = options.colorType
}
if ('colorFormat' in options) {
colorFormat = options.colorFormat
check.oneOf(
options.colorFormat, colorTextureFormats,
'invalid color format for texture')
}
}
if ('depth' in options) {
params.depth = options.depth
}
if ('stencil' in options) {
params.stencil = options.stencil
}
if ('depthStencil' in options) {
params.depthStencil = options.depthStencil
}
}
var colorCubes
if (colorBuffer) {
if (Array.isArray(colorBuffer)) {
colorCubes = []
for (i = 0; i < colorBuffer.length; ++i) {
colorCubes[i] = colorBuffer[i]
}
} else {
colorCubes = [ colorBuffer ]
}
} else {
colorCubes = Array(colorCount)
var cubeMapParams = {
radius: radius,
format: colorFormat,
type: colorType
}
for (i = 0; i < colorCount; ++i) {
colorCubes[i] = textureState.createCube(cubeMapParams)
}
}
// Check color cubes
params.color = Array(colorCubes.length)
for (i = 0; i < colorCubes.length; ++i) {
var cube = colorCubes[i]
check(
typeof cube === 'function' && cube._reglType === 'textureCube',
'invalid cube map')
radius = radius || cube.width
check(
cube.width === radius && cube.height === radius,
'invalid cube map shape')
params.color[i] = {
target: GL_TEXTURE_CUBE_MAP_POSITIVE_X,
data: colorCubes[i]
}
}
for (i = 0; i < 6; ++i) {
for (var j = 0; j < colorCubes.length; ++j) {
params.color[j].target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + i
}
// reuse depth-stencil attachments across all cube maps
if (i > 0) {
params.depth = faces[0].depth
params.stencil = faces[0].stencil
params.depthStencil = faces[0].depthStencil
}
if (faces[i]) {
(faces[i])(params)
} else {
faces[i] = createFBO(params)
}
}
return extend(reglFramebufferCube, {
width: radius,
height: radius,
color: colorCubes
})
}
function resize (radius_) {
var i
var radius = radius_ | 0
check(radius > 0 && radius <= limits.maxCubeMapSize,
'invalid radius for cube fbo')
if (radius === reglFramebufferCube.width) {
return reglFramebufferCube
}
var colors = reglFramebufferCube.color
for (i = 0; i < colors.length; ++i) {
colors[i].resize(radius)
}
for (i = 0; i < 6; ++i) {
faces[i].resize(radius)
}
reglFramebufferCube.width = reglFramebufferCube.height = radius
return reglFramebufferCube
}
reglFramebufferCube(options)
return extend(reglFramebufferCube, {
faces: faces,
resize: resize,
_reglType: 'framebufferCube',
destroy: function () {
faces.forEach(function (f) {
f.destroy()
})
}
})
}
function restoreFramebuffers () {
values(framebufferSet).forEach(function (fb) {
fb.framebuffer = gl.createFramebuffer()
updateFramebuffer(fb)
})
}
return extend(framebufferState, {
getFramebuffer: function (object) {
if (typeof object === 'function' && object._reglType === 'framebuffer') {
var fbo = object._framebuffer
if (fbo instanceof REGLFramebuffer) {
return fbo
}
}
return null
},
create: createFBO,
createCube: createCubeFBO,
clear: function () {
values(framebufferSet).forEach(destroy)
},
restore: restoreFramebuffers
})
}
},{"./util/check":20,"./util/extend":23,"./util/values":31}],12:[function(require,module,exports){
var GL_SUBPIXEL_BITS = 0x0D50
var GL_RED_BITS = 0x0D52
var GL_GREEN_BITS = 0x0D53
var GL_BLUE_BITS = 0x0D54
var GL_ALPHA_BITS = 0x0D55
var GL_DEPTH_BITS = 0x0D56
var GL_STENCIL_BITS = 0x0D57
var GL_ALIASED_POINT_SIZE_RANGE = 0x846D
var GL_ALIASED_LINE_WIDTH_RANGE = 0x846E
var GL_MAX_TEXTURE_SIZE = 0x0D33
var GL_MAX_VIEWPORT_DIMS = 0x0D3A
var GL_MAX_VERTEX_ATTRIBS = 0x8869
var GL_MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB
var GL_MAX_VARYING_VECTORS = 0x8DFC
var GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D
var GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = 0x8B4C
var GL_MAX_TEXTURE_IMAGE_UNITS = 0x8872
var GL_MAX_FRAGMENT_UNIFORM_VECTORS = 0x8DFD
var GL_MAX_CUBE_MAP_TEXTURE_SIZE = 0x851C
var GL_MAX_RENDERBUFFER_SIZE = 0x84E8
var GL_VENDOR = 0x1F00
var GL_RENDERER = 0x1F01
var GL_VERSION = 0x1F02
var GL_SHADING_LANGUAGE_VERSION = 0x8B8C
var GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF
var GL_MAX_COLOR_ATTACHMENTS_WEBGL = 0x8CDF
var GL_MAX_DRAW_BUFFERS_WEBGL = 0x8824
module.exports = function (gl, extensions) {
var maxAnisotropic = 1
if (extensions.ext_texture_filter_anisotropic) {
maxAnisotropic = gl.getParameter(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT)
}
var maxDrawbuffers = 1
var maxColorAttachments = 1
if (extensions.webgl_draw_buffers) {
maxDrawbuffers = gl.getParameter(GL_MAX_DRAW_BUFFERS_WEBGL)
maxColorAttachments = gl.getParameter(GL_MAX_COLOR_ATTACHMENTS_WEBGL)
}
return {
// drawing buffer bit depth
colorBits: [
gl.getParameter(GL_RED_BITS),
gl.getParameter(GL_GREEN_BITS),
gl.getParameter(GL_BLUE_BITS),
gl.getParameter(GL_ALPHA_BITS)
],
depthBits: gl.getParameter(GL_DEPTH_BITS),
stencilBits: gl.getParameter(GL_STENCIL_BITS),
subpixelBits: gl.getParameter(GL_SUBPIXEL_BITS),
// supported extensions
extensions: Object.keys(extensions).filter(function (ext) {
return !!extensions[ext]
}),
// max aniso samples
maxAnisotropic: maxAnisotropic,
// max draw buffers
maxDrawbuffers: maxDrawbuffers,
maxColorAttachments: maxColorAttachments,
// point and line size ranges
pointSizeDims: gl.getParameter(GL_ALIASED_POINT_SIZE_RANGE),
lineWidthDims: gl.getParameter(GL_ALIASED_LINE_WIDTH_RANGE),
maxViewportDims: gl.getParameter(GL_MAX_VIEWPORT_DIMS),
maxCombinedTextureUnits: gl.getParameter(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS),
maxCubeMapSize: gl.getParameter(GL_MAX_CUBE_MAP_TEXTURE_SIZE),
maxRenderbufferSize: gl.getParameter(GL_MAX_RENDERBUFFER_SIZE),
maxTextureUnits: gl.getParameter(GL_MAX_TEXTURE_IMAGE_UNITS),
maxTextureSize: gl.getParameter(GL_MAX_TEXTURE_SIZE),
maxAttributes: gl.getParameter(GL_MAX_VERTEX_ATTRIBS),
maxVertexUniforms: gl.getParameter(GL_MAX_VERTEX_UNIFORM_VECTORS),
maxVertexTextureUnits: gl.getParameter(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS),
maxVaryingVectors: gl.getParameter(GL_MAX_VARYING_VECTORS),
maxFragmentUniforms: gl.getParameter(GL_MAX_FRAGMENT_UNIFORM_VECTORS),
// vendor info
glsl: gl.getParameter(GL_SHADING_LANGUAGE_VERSION),
renderer: gl.getParameter(GL_RENDERER),
vendor: gl.getParameter(GL_VENDOR),
version: gl.getParameter(GL_VERSION)
}
}
},{}],13:[function(require,module,exports){
var check = require('./util/check')
var isTypedArray = require('./util/is-typed-array')
var GL_RGBA = 6408
var GL_UNSIGNED_BYTE = 5121
var GL_PACK_ALIGNMENT = 0x0D05
var GL_FLOAT = 0x1406 // 5126
module.exports = function wrapReadPixels (
gl,
framebufferState,
reglPoll,
context,
glAttributes,
extensions) {
function readPixels (input) {
var type
if (framebufferState.next === null) {
check(
glAttributes.preserveDrawingBuffer,
'you must create a webgl context with "preserveDrawingBuffer":true in order to read pixels from the drawing buffer')
type = GL_UNSIGNED_BYTE
} else {
check(
framebufferState.next.colorAttachments[0].texture !== null,
'You cannot read from a renderbuffer')
type = framebufferState.next.colorAttachments[0].texture._texture.type
if (extensions.oes_texture_float) {
check(
type === GL_UNSIGNED_BYTE || type === GL_FLOAT,
'Reading from a framebuffer is only allowed for the types \'uint8\' and \'float\'')
} else {
check(
type === GL_UNSIGNED_BYTE,
'Reading from a framebuffer is only allowed for the type \'uint8\'')
}
}
var x = 0
var y = 0
var width = context.framebufferWidth
var height = context.framebufferHeight
var data = null
if (isTypedArray(input)) {
data = input
} else if (input) {
check.type(input, 'object', 'invalid arguments to regl.read()')
x = input.x | 0
y = input.y | 0
check(
x >= 0 && x < context.framebufferWidth,
'invalid x offset for regl.read')
check(
y >= 0 && y < context.framebufferHeight,
'invalid y offset for regl.read')
width = (input.width || (context.framebufferWidth - x)) | 0
height = (input.height || (context.framebufferHeight - y)) | 0
data = input.data || null
}
// sanity check input.data
if (data) {
if (type === GL_UNSIGNED_BYTE) {
check(
data instanceof Uint8Array,
'buffer must be \'Uint8Array\' when reading from a framebuffer of type \'uint8\'')
} else if (type === GL_FLOAT) {
check(
data instanceof Float32Array,
'buffer must be \'Float32Array\' when reading from a framebuffer of type \'float\'')
}
}
check(
width > 0 && width + x <= context.framebufferWidth,
'invalid width for read pixels')
check(
height > 0 && height + y <= context.framebufferHeight,
'invalid height for read pixels')
// Update WebGL state
reglPoll()
// Compute size
var size = width * height * 4
// Allocate data
if (!data) {
if (type === GL_UNSIGNED_BYTE) {
data = new Uint8Array(size)
} else if (type === GL_FLOAT) {
data = data || new Float32Array(size)
}
}
// Type check
check.isTypedArray(data, 'data buffer for regl.read() must be a typedarray')
check(data.byteLength >= size, 'data buffer for regl.read() too small')
// Run read pixels
gl.pixelStorei(GL_PACK_ALIGNMENT, 4)
gl.readPixels(x, y, width, height, GL_RGBA,
type,
data)
return data
}
return readPixels
}
},{"./util/check":20,"./util/is-typed-array":26}],14:[function(require,module,exports){
var check = require('./util/check')
var values = require('./util/values')
var GL_RENDERBUFFER = 0x8D41
var GL_RGBA4 = 0x8056
var GL_RGB5_A1 = 0x8057
var GL_RGB565 = 0x8D62
var GL_DEPTH_COMPONENT16 = 0x81A5
var GL_STENCIL_INDEX8 = 0x8D48
var GL_DEPTH_STENCIL = 0x84F9
var GL_SRGB8_ALPHA8_EXT = 0x8C43
var GL_RGBA32F_EXT = 0x8814
var GL_RGBA16F_EXT = 0x881A
var GL_RGB16F_EXT = 0x881B
var FORMAT_SIZES = []
FORMAT_SIZES[GL_RGBA4] = 2
FORMAT_SIZES[GL_RGB5_A1] = 2
FORMAT_SIZES[GL_RGB565] = 2
FORMAT_SIZES[GL_DEPTH_COMPONENT16] = 2
FORMAT_SIZES[GL_STENCIL_INDEX8] = 1
FORMAT_SIZES[GL_DEPTH_STENCIL] = 4
FORMAT_SIZES[GL_SRGB8_ALPHA8_EXT] = 4
FORMAT_SIZES[GL_RGBA32F_EXT] = 16
FORMAT_SIZES[GL_RGBA16F_EXT] = 8
FORMAT_SIZES[GL_RGB16F_EXT] = 6
function getRenderbufferSize (format, width, height) {
return FORMAT_SIZES[format] * width * height
}
module.exports = function (gl, extensions, limits, stats, config) {
var formatTypes = {
'rgba4': GL_RGBA4,
'rgb565': GL_RGB565,
'rgb5 a1': GL_RGB5_A1,
'depth': GL_DEPTH_COMPONENT16,
'stencil': GL_STENCIL_INDEX8,
'depth stencil': GL_DEPTH_STENCIL
}
if (extensions.ext_srgb) {
formatTypes['srgba'] = GL_SRGB8_ALPHA8_EXT
}
if (extensions.ext_color_buffer_half_float) {
formatTypes['rgba16f'] = GL_RGBA16F_EXT
formatTypes['rgb16f'] = GL_RGB16F_EXT
}
if (extensions.webgl_color_buffer_float) {
formatTypes['rgba32f'] = GL_RGBA32F_EXT
}
var formatTypesInvert = []
Object.keys(formatTypes).forEach(function (key) {
var val = formatTypes[key]
formatTypesInvert[val] = key
})
var renderbufferCount = 0
var renderbufferSet = {}
function REGLRenderbuffer (renderbuffer) {
this.id = renderbufferCount++
this.refCount = 1
this.renderbuffer = renderbuffer
this.format = GL_RGBA4
this.width = 0
this.height = 0
if (config.profile) {
this.stats = {size: 0}
}
}
REGLRenderbuffer.prototype.decRef = function () {
if (--this.refCount <= 0) {
destroy(this)
}
}
function destroy (rb) {
var handle = rb.renderbuffer
check(handle, 'must not double destroy renderbuffer')
gl.bindRenderbuffer(GL_RENDERBUFFER, null)
gl.deleteRenderbuffer(handle)
rb.renderbuffer = null
rb.refCount = 0
delete renderbufferSet[rb.id]
stats.renderbufferCount--
}
function createRenderbuffer (a, b) {
var renderbuffer = new REGLRenderbuffer(gl.createRenderbuffer())
renderbufferSet[renderbuffer.id] = renderbuffer
stats.renderbufferCount++
function reglRenderbuffer (a, b) {
var w = 0
var h = 0
var format = GL_RGBA4
if (typeof a === 'object' && a) {
var options = a
if ('shape' in options) {
var shape = options.shape
check(Array.isArray(shape) && shape.length >= 2,
'invalid renderbuffer shape')
w = shape[0] | 0
h = shape[1] | 0
} else {
if ('radius' in options) {
w = h = options.radius | 0
}
if ('width' in options) {
w = options.width | 0
}
if ('height' in options) {
h = options.height | 0
}
}
if ('format' in options) {
check.parameter(options.format, formatTypes,
'invalid renderbuffer format')
format = formatTypes[options.format]
}
} else if (typeof a === 'number') {
w = a | 0
if (typeof b === 'number') {
h = b | 0
} else {
h = w
}
} else if (!a) {
w = h = 1
} else {
check.raise('invalid arguments to renderbuffer constructor')
}
// check shape
check(
w > 0 && h > 0 &&
w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,
'invalid renderbuffer size')
if (w === renderbuffer.width &&
h === renderbuffer.height &&
format === renderbuffer.format) {
return
}
reglRenderbuffer.width = renderbuffer.width = w
reglRenderbuffer.height = renderbuffer.height = h
renderbuffer.format = format
gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)
gl.renderbufferStorage(GL_RENDERBUFFER, format, w, h)
if (config.profile) {
renderbuffer.stats.size = getRenderbufferSize(renderbuffer.format, renderbuffer.width, renderbuffer.height)
}
reglRenderbuffer.format = formatTypesInvert[renderbuffer.format]
return reglRenderbuffer
}
function resize (w_, h_) {
var w = w_ | 0
var h = (h_ | 0) || w
if (w === renderbuffer.width && h === renderbuffer.height) {
return reglRenderbuffer
}
// check shape
check(
w > 0 && h > 0 &&
w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,
'invalid renderbuffer size')
reglRenderbuffer.width = renderbuffer.width = w
reglRenderbuffer.height = renderbuffer.height = h
gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)
gl.renderbufferStorage(GL_RENDERBUFFER, renderbuffer.format, w, h)
// also, recompute size.
if (config.profile) {
renderbuffer.stats.size = getRenderbufferSize(
renderbuffer.format, renderbuffer.width, renderbuffer.height)
}
return reglRenderbuffer
}
reglRenderbuffer(a, b)
reglRenderbuffer.resize = resize
reglRenderbuffer._reglType = 'renderbuffer'
reglRenderbuffer._renderbuffer = renderbuffer
if (config.profile) {
reglRenderbuffer.stats = renderbuffer.stats
}
reglRenderbuffer.destroy = function () {
renderbuffer.decRef()
}
return reglRenderbuffer
}
if (config.profile) {
stats.getTotalRenderbufferSize = function () {
var total = 0
Object.keys(renderbufferSet).forEach(function (key) {
total += renderbufferSet[key].stats.size
})
return total
}
}
function restoreRenderbuffers () {
values(renderbufferSet).forEach(function (rb) {
rb.renderbuffer = gl.createRenderbuffer()
gl.bindRenderbuffer(GL_RENDERBUFFER, rb.renderbuffer)
gl.renderbufferStorage(GL_RENDERBUFFER, rb.format, rb.width, rb.height)
})
gl.bindRenderbuffer(GL_RENDERBUFFER, null)
}
return {
create: createRenderbuffer,
clear: function () {
values(renderbufferSet).forEach(destroy)
},
restore: restoreRenderbuffers
}
}
},{"./util/check":20,"./util/values":31}],15:[function(require,module,exports){
var check = require('./util/check')
var values = require('./util/values')
var GL_FRAGMENT_SHADER = 35632
var GL_VERTEX_SHADER = 35633
var GL_ACTIVE_UNIFORMS = 0x8B86
var GL_ACTIVE_ATTRIBUTES = 0x8B89
module.exports = function wrapShaderState (gl, stringStore, stats, config) {
// ===================================================
// glsl compilation and linking
// ===================================================
var fragShaders = {}
var vertShaders = {}
function ActiveInfo (name, id, location, info) {
this.name = name
this.id = id
this.location = location
this.info = info
}
function insertActiveInfo (list, info) {
for (var i = 0; i < list.length; ++i) {
if (list[i].id === info.id) {
list[i].location = info.location
return
}
}
list.push(info)
}
function getShader (type, id, command) {
var cache = type === GL_FRAGMENT_SHADER ? fragShaders : vertShaders
var shader = cache[id]
if (!shader) {
var source = stringStore.str(id)
shader = gl.createShader(type)
gl.shaderSource(shader, source)
gl.compileShader(shader)
check.shaderError(gl, shader, source, type, command)
cache[id] = shader
}
return shader
}
// ===================================================
// program linking
// ===================================================
var programCache = {}
var programList = []
var PROGRAM_COUNTER = 0
function REGLProgram (fragId, vertId) {
this.id = PROGRAM_COUNTER++
this.fragId = fragId
this.vertId = vertId
this.program = null
this.uniforms = []
this.attributes = []
if (config.profile) {
this.stats = {
uniformsCount: 0,
attributesCount: 0
}
}
}
function linkProgram (desc, command) {
var i, info
// -------------------------------
// compile & link
// -------------------------------
var fragShader = getShader(GL_FRAGMENT_SHADER, desc.fragId)
var vertShader = getShader(GL_VERTEX_SHADER, desc.vertId)
var program = desc.program = gl.createProgram()
gl.attachShader(program, fragShader)
gl.attachShader(program, vertShader)
gl.linkProgram(program)
check.linkError(
gl,
program,
stringStore.str(desc.fragId),
stringStore.str(desc.vertId),
command)
// -------------------------------
// grab uniforms
// -------------------------------
var numUniforms = gl.getProgramParameter(program, GL_ACTIVE_UNIFORMS)
if (config.profile) {
desc.stats.uniformsCount = numUniforms
}
var uniforms = desc.uniforms
for (i = 0; i < numUniforms; ++i) {
info = gl.getActiveUniform(program, i)
if (info) {
if (info.size > 1) {
for (var j = 0; j < info.size; ++j) {
var name = info.name.replace('[0]', '[' + j + ']')
insertActiveInfo(uniforms, new ActiveInfo(
name,
stringStore.id(name),
gl.getUniformLocation(program, name),
info))
}
} else {
insertActiveInfo(uniforms, new ActiveInfo(
info.name,
stringStore.id(info.name),
gl.getUniformLocation(program, info.name),
info))
}
}
}
// -------------------------------
// grab attributes
// -------------------------------
var numAttributes = gl.getProgramParameter(program, GL_ACTIVE_ATTRIBUTES)
if (config.profile) {
desc.stats.attributesCount = numAttributes
}
var attributes = desc.attributes
for (i = 0; i < numAttributes; ++i) {
info = gl.getActiveAttrib(program, i)
if (info) {
insertActiveInfo(attributes, new ActiveInfo(
info.name,
stringStore.id(info.name),
gl.getAttribLocation(program, info.name),
info))
}
}
}
if (config.profile) {
stats.getMaxUniformsCount = function () {
var m = 0
programList.forEach(function (desc) {
if (desc.stats.uniformsCount > m) {
m = desc.stats.uniformsCount
}
})
return m
}
stats.getMaxAttributesCount = function () {
var m = 0
programList.forEach(function (desc) {
if (desc.stats.attributesCount > m) {
m = desc.stats.attributesCount
}
})
return m
}
}
function restoreShaders () {
fragShaders = {}
vertShaders = {}
for (var i = 0; i < programList.length; ++i) {
linkProgram(programList[i])
}
}
return {
clear: function () {
var deleteShader = gl.deleteShader.bind(gl)
values(fragShaders).forEach(deleteShader)
fragShaders = {}
values(vertShaders).forEach(deleteShader)
vertShaders = {}
programList.forEach(function (desc) {
gl.deleteProgram(desc.program)
})
programList.length = 0
programCache = {}
stats.shaderCount = 0
},
program: function (vertId, fragId, command) {
check.command(vertId >= 0, 'missing vertex shader', command)
check.command(fragId >= 0, 'missing fragment shader', command)
stats.shaderCount++
var cache = programCache[fragId]
if (!cache) {
cache = programCache[fragId] = {}
}
var program = cache[vertId]
if (!program) {
program = new REGLProgram(fragId, vertId)
linkProgram(program, command)
cache[vertId] = program
programList.push(program)
}
return program
},
restore: restoreShaders,
shader: getShader,
frag: -1,
vert: -1
}
}
},{"./util/check":20,"./util/values":31}],16:[function(require,module,exports){
module.exports = function stats () {
return {
bufferCount: 0,
elementsCount: 0,
framebufferCount: 0,
shaderCount: 0,
textureCount: 0,
cubeCount: 0,
renderbufferCount: 0,
maxTextureUnits: 0
}
}
},{}],17:[function(require,module,exports){
module.exports = function createStringStore () {
var stringIds = {'': 0}
var stringValues = ['']
return {
id: function (str) {
var result = stringIds[str]
if (result) {
return result
}
result = stringIds[str] = stringValues.length
stringValues.push(str)
return result
},
str: function (id) {
return stringValues[id]
}
}
}
},{}],18:[function(require,module,exports){
var check = require('./util/check')
var extend = require('./util/extend')
var values = require('./util/values')
var isTypedArray = require('./util/is-typed-array')
var isNDArrayLike = require('./util/is-ndarray')
var pool = require('./util/pool')
var convertToHalfFloat = require('./util/to-half-float')
var isArrayLike = require('./util/is-array-like')
var dtypes = require('./constants/arraytypes.json')
var arrayTypes = require('./constants/arraytypes.json')
var GL_COMPRESSED_TEXTURE_FORMATS = 0x86A3
var GL_TEXTURE_2D = 0x0DE1
var GL_TEXTURE_CUBE_MAP = 0x8513
var GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515
var GL_RGBA = 0x1908
var GL_ALPHA = 0x1906
var GL_RGB = 0x1907
var GL_LUMINANCE = 0x1909
var GL_LUMINANCE_ALPHA = 0x190A
var GL_RGBA4 = 0x8056
var GL_RGB5_A1 = 0x8057
var GL_RGB565 = 0x8D62
var GL_UNSIGNED_SHORT_4_4_4_4 = 0x8033
var GL_UNSIGNED_SHORT_5_5_5_1 = 0x8034
var GL_UNSIGNED_SHORT_5_6_5 = 0x8363
var GL_UNSIGNED_INT_24_8_WEBGL = 0x84FA
var GL_DEPTH_COMPONENT = 0x1902
var GL_DEPTH_STENCIL = 0x84F9
var GL_SRGB_EXT = 0x8C40
var GL_SRGB_ALPHA_EXT = 0x8C42
var GL_HALF_FLOAT_OES = 0x8D61
var GL_COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0
var GL_COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1
var GL_COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2
var GL_COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3
var GL_COMPRESSED_RGB_ATC_WEBGL = 0x8C92
var GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL = 0x8C93
var GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL = 0x87EE
var GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00
var GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG = 0x8C01
var GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02
var GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03
var GL_COMPRESSED_RGB_ETC1_WEBGL = 0x8D64
var GL_UNSIGNED_BYTE = 0x1401
var GL_UNSIGNED_SHORT = 0x1403
var GL_UNSIGNED_INT = 0x1405
var GL_FLOAT = 0x1406
var GL_TEXTURE_WRAP_S = 0x2802
var GL_TEXTURE_WRAP_T = 0x2803
var GL_REPEAT = 0x2901
var GL_CLAMP_TO_EDGE = 0x812F
var GL_MIRRORED_REPEAT = 0x8370
var GL_TEXTURE_MAG_FILTER = 0x2800
var GL_TEXTURE_MIN_FILTER = 0x2801
var GL_NEAREST = 0x2600
var GL_LINEAR = 0x2601
var GL_NEAREST_MIPMAP_NEAREST = 0x2700
var GL_LINEAR_MIPMAP_NEAREST = 0x2701
var GL_NEAREST_MIPMAP_LINEAR = 0x2702
var GL_LINEAR_MIPMAP_LINEAR = 0x2703
var GL_GENERATE_MIPMAP_HINT = 0x8192
var GL_DONT_CARE = 0x1100
var GL_FASTEST = 0x1101
var GL_NICEST = 0x1102
var GL_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE
var GL_UNPACK_ALIGNMENT = 0x0CF5
var GL_UNPACK_FLIP_Y_WEBGL = 0x9240
var GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241
var GL_UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243
var GL_BROWSER_DEFAULT_WEBGL = 0x9244
var GL_TEXTURE0 = 0x84C0
var MIPMAP_FILTERS = [
GL_NEAREST_MIPMAP_NEAREST,
GL_NEAREST_MIPMAP_LINEAR,
GL_LINEAR_MIPMAP_NEAREST,
GL_LINEAR_MIPMAP_LINEAR
]
var CHANNELS_FORMAT = [
0,
GL_LUMINANCE,
GL_LUMINANCE_ALPHA,
GL_RGB,
GL_RGBA
]
var FORMAT_CHANNELS = {}
FORMAT_CHANNELS[GL_LUMINANCE] =
FORMAT_CHANNELS[GL_ALPHA] =
FORMAT_CHANNELS[GL_DEPTH_COMPONENT] = 1
FORMAT_CHANNELS[GL_DEPTH_STENCIL] =
FORMAT_CHANNELS[GL_LUMINANCE_ALPHA] = 2
FORMAT_CHANNELS[GL_RGB] =
FORMAT_CHANNELS[GL_SRGB_EXT] = 3
FORMAT_CHANNELS[GL_RGBA] =
FORMAT_CHANNELS[GL_SRGB_ALPHA_EXT] = 4
var formatTypes = {}
formatTypes[GL_RGBA4] = GL_UNSIGNED_SHORT_4_4_4_4
formatTypes[GL_RGB565] = GL_UNSIGNED_SHORT_5_6_5
formatTypes[GL_RGB5_A1] = GL_UNSIGNED_SHORT_5_5_5_1
formatTypes[GL_DEPTH_COMPONENT] = GL_UNSIGNED_INT
formatTypes[GL_DEPTH_STENCIL] = GL_UNSIGNED_INT_24_8_WEBGL
function objectName (str) {
return '[object ' + str + ']'
}
var CANVAS_CLASS = objectName('HTMLCanvasElement')
var CONTEXT2D_CLASS = objectName('CanvasRenderingContext2D')
var IMAGE_CLASS = objectName('HTMLImageElement')
var VIDEO_CLASS = objectName('HTMLVideoElement')
var PIXEL_CLASSES = Object.keys(dtypes).concat([
CANVAS_CLASS,
CONTEXT2D_CLASS,
IMAGE_CLASS,
VIDEO_CLASS
])
// for every texture type, store
// the size in bytes.
var TYPE_SIZES = []
TYPE_SIZES[GL_UNSIGNED_BYTE] = 1
TYPE_SIZES[GL_FLOAT] = 4
TYPE_SIZES[GL_HALF_FLOAT_OES] = 2
TYPE_SIZES[GL_UNSIGNED_SHORT] = 2
TYPE_SIZES[GL_UNSIGNED_INT] = 4
var FORMAT_SIZES_SPECIAL = []
FORMAT_SIZES_SPECIAL[GL_RGBA4] = 2
FORMAT_SIZES_SPECIAL[GL_RGB5_A1] = 2
FORMAT_SIZES_SPECIAL[GL_RGB565] = 2
FORMAT_SIZES_SPECIAL[GL_DEPTH_STENCIL] = 4
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_S3TC_DXT1_EXT] = 0.5
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT1_EXT] = 0.5
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT3_EXT] = 1
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT5_EXT] = 1
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ATC_WEBGL] = 0.5
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL] = 1
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL] = 1
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG] = 0.5
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG] = 0.25
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG] = 0.5
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG] = 0.25
FORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ETC1_WEBGL] = 0.5
function isNumericArray (arr) {
return (
Array.isArray(arr) &&
(arr.length === 0 ||
typeof arr[0] === 'number'))
}
function isRectArray (arr) {
if (!Array.isArray(arr)) {
return false
}
var width = arr.length
if (width === 0 || !isArrayLike(arr[0])) {
return false
}
return true
}
function classString (x) {
return Object.prototype.toString.call(x)
}
function isCanvasElement (object) {
return classString(object) === CANVAS_CLASS
}
function isContext2D (object) {
return classString(object) === CONTEXT2D_CLASS
}
function isImageElement (object) {
return classString(object) === IMAGE_CLASS
}
function isVideoElement (object) {
return classString(object) === VIDEO_CLASS
}
function isPixelData (object) {
if (!object) {
return false
}
var className = classString(object)
if (PIXEL_CLASSES.indexOf(className) >= 0) {
return true
}
return (
isNumericArray(object) ||
isRectArray(object) ||
isNDArrayLike(object))
}
function typedArrayCode (data) {
return arrayTypes[Object.prototype.toString.call(data)] | 0
}
function convertData (result, data) {
var n = result.width * result.height * result.channels
check(data.length === n, 'inconsistent array length for texture. Expected: ' + n + '. Was: ' + data.length)
switch (result.type) {
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
var converted = pool.allocType(result.type, n)
converted.set(data)
result.data = converted
break
case GL_HALF_FLOAT_OES:
result.data = convertToHalfFloat(data)
break
default:
check.raise('unsupported texture type, must specify a typed array')
}
}
function preConvert (image, n) {
return pool.allocType(
image.type === GL_HALF_FLOAT_OES
? GL_FLOAT
: image.type, n)
}
function postConvert (image, data) {
if (image.type === GL_HALF_FLOAT_OES) {
image.data = convertToHalfFloat(data)
pool.freeType(data)
} else {
image.data = data
}
}
function transposeData (image, array, strideX, strideY, strideC, offset) {
var w = image.width
var h = image.height
var c = image.channels
var n = w * h * c
var data = preConvert(image, n)
var p = 0
for (var i = 0; i < h; ++i) {
for (var j = 0; j < w; ++j) {
for (var k = 0; k < c; ++k) {
data[p++] = array[strideX * j + strideY * i + strideC * k + offset]
}
}
}
postConvert(image, data)
}
function flatten2DData (image, array, w, h) {
var n = w * h
var data = preConvert(image, n)
var p = 0
for (var i = 0; i < h; ++i) {
var row = array[i]
for (var j = 0; j < w; ++j) {
data[p++] = row[j]
}
}
postConvert(image, data)
}
function flatten3DData (image, array, w, h, c) {
var n = w * h * c
var data = preConvert(image, n)
var p = 0
for (var i = 0; i < h; ++i) {
var row = array[i]
for (var j = 0; j < w; ++j) {
var pixel = row[j]
for (var k = 0; k < c; ++k) {
data[p++] = pixel[k]
}
}
}
postConvert(image, data)
}
function getTextureSize (format, type, width, height, isMipmap, isCube) {
var s
if (typeof FORMAT_SIZES_SPECIAL[format] !== 'undefined') {
// we have a special array for dealing with weird color formats such as RGB5A1
s = FORMAT_SIZES_SPECIAL[format]
} else {
s = FORMAT_CHANNELS[format] * TYPE_SIZES[type]
}
if (isCube) {
s *= 6
}
if (isMipmap) {
// compute the total size of all the mipmaps.
var total = 0
var w = width
while (w >= 1) {
// we can only use mipmaps on a square image,
// so we can simply use the width and ignore the height:
total += s * w * w
w /= 2
}
return total
} else {
return s * width * height
}
}
module.exports = function createTextureSet (
gl, extensions, limits, reglPoll, contextState, stats, config) {
// -------------------------------------------------------
// Initialize constants and parameter tables here
// -------------------------------------------------------
var mipmapHint = {
"don't care": GL_DONT_CARE,
'dont care': GL_DONT_CARE,
'nice': GL_NICEST,
'fast': GL_FASTEST
}
var wrapModes = {
'repeat': GL_REPEAT,
'clamp': GL_CLAMP_TO_EDGE,
'mirror': GL_MIRRORED_REPEAT
}
var magFilters = {
'nearest': GL_NEAREST,
'linear': GL_LINEAR
}
var minFilters = extend({
'mipmap': GL_LINEAR_MIPMAP_LINEAR,
'nearest mipmap nearest': GL_NEAREST_MIPMAP_NEAREST,
'linear mipmap nearest': GL_LINEAR_MIPMAP_NEAREST,
'nearest mipmap linear': GL_NEAREST_MIPMAP_LINEAR,
'linear mipmap linear': GL_LINEAR_MIPMAP_LINEAR
}, magFilters)
var colorSpace = {
'none': 0,
'browser': GL_BROWSER_DEFAULT_WEBGL
}
var textureTypes = {
'uint8': GL_UNSIGNED_BYTE,
'rgba4': GL_UNSIGNED_SHORT_4_4_4_4,
'rgb565': GL_UNSIGNED_SHORT_5_6_5,
'rgb5 a1': GL_UNSIGNED_SHORT_5_5_5_1
}
var textureFormats = {
'alpha': GL_ALPHA,
'luminance': GL_LUMINANCE,
'luminance alpha': GL_LUMINANCE_ALPHA,
'rgb': GL_RGB,
'rgba': GL_RGBA,
'rgba4': GL_RGBA4,
'rgb5 a1': GL_RGB5_A1,
'rgb565': GL_RGB565
}
var compressedTextureFormats = {}
if (extensions.ext_srgb) {
textureFormats.srgb = GL_SRGB_EXT
textureFormats.srgba = GL_SRGB_ALPHA_EXT
}
if (extensions.oes_texture_float) {
textureTypes.float32 = textureTypes.float = GL_FLOAT
}
if (extensions.oes_texture_half_float) {
textureTypes['float16'] = textureTypes['half float'] = GL_HALF_FLOAT_OES
}
if (extensions.webgl_depth_texture) {
extend(textureFormats, {
'depth': GL_DEPTH_COMPONENT,
'depth stencil': GL_DEPTH_STENCIL
})
extend(textureTypes, {
'uint16': GL_UNSIGNED_SHORT,
'uint32': GL_UNSIGNED_INT,
'depth stencil': GL_UNSIGNED_INT_24_8_WEBGL
})
}
if (extensions.webgl_compressed_texture_s3tc) {
extend(compressedTextureFormats, {
'rgb s3tc dxt1': GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
'rgba s3tc dxt1': GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
'rgba s3tc dxt3': GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
'rgba s3tc dxt5': GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
})
}
if (extensions.webgl_compressed_texture_atc) {
extend(compressedTextureFormats, {
'rgb atc': GL_COMPRESSED_RGB_ATC_WEBGL,
'rgba atc explicit alpha': GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL,
'rgba atc interpolated alpha': GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL
})
}
if (extensions.webgl_compressed_texture_pvrtc) {
extend(compressedTextureFormats, {
'rgb pvrtc 4bppv1': GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG,
'rgb pvrtc 2bppv1': GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG,
'rgba pvrtc 4bppv1': GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG,
'rgba pvrtc 2bppv1': GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG
})
}
if (extensions.webgl_compressed_texture_etc1) {
compressedTextureFormats['rgb etc1'] = GL_COMPRESSED_RGB_ETC1_WEBGL
}
// Copy over all texture formats
var supportedCompressedFormats = Array.prototype.slice.call(
gl.getParameter(GL_COMPRESSED_TEXTURE_FORMATS))
Object.keys(compressedTextureFormats).forEach(function (name) {
var format = compressedTextureFormats[name]
if (supportedCompressedFormats.indexOf(format) >= 0) {
textureFormats[name] = format
}
})
var supportedFormats = Object.keys(textureFormats)
limits.textureFormats = supportedFormats
// associate with every format string its
// corresponding GL-value.
var textureFormatsInvert = []
Object.keys(textureFormats).forEach(function (key) {
var val = textureFormats[key]
textureFormatsInvert[val] = key
})
// associate with every type string its
// corresponding GL-value.
var textureTypesInvert = []
Object.keys(textureTypes).forEach(function (key) {
var val = textureTypes[key]
textureTypesInvert[val] = key
})
var magFiltersInvert = []
Object.keys(magFilters).forEach(function (key) {
var val = magFilters[key]
magFiltersInvert[val] = key
})
var minFiltersInvert = []
Object.keys(minFilters).forEach(function (key) {
var val = minFilters[key]
minFiltersInvert[val] = key
})
var wrapModesInvert = []
Object.keys(wrapModes).forEach(function (key) {
var val = wrapModes[key]
wrapModesInvert[val] = key
})
// colorFormats[] gives the format (channels) associated to an
// internalformat
var colorFormats = supportedFormats.reduce(function (color, key) {
var glenum = textureFormats[key]
if (glenum === GL_LUMINANCE ||
glenum === GL_ALPHA ||
glenum === GL_LUMINANCE ||
glenum === GL_LUMINANCE_ALPHA ||
glenum === GL_DEPTH_COMPONENT ||
glenum === GL_DEPTH_STENCIL) {
color[glenum] = glenum
} else if (glenum === GL_RGB5_A1 || key.indexOf('rgba') >= 0) {
color[glenum] = GL_RGBA
} else {
color[glenum] = GL_RGB
}
return color
}, {})
function TexFlags () {
// format info
this.internalformat = GL_RGBA
this.format = GL_RGBA
this.type = GL_UNSIGNED_BYTE
this.compressed = false
// pixel storage
this.premultiplyAlpha = false
this.flipY = false
this.unpackAlignment = 1
this.colorSpace = 0
// shape info
this.width = 0
this.height = 0
this.channels = 4
}
function copyFlags (result, other) {
result.internalformat = other.internalformat
result.format = other.format
result.type = other.type
result.compressed = other.compressed
result.premultiplyAlpha = other.premultiplyAlpha
result.flipY = other.flipY
result.unpackAlignment = other.unpackAlignment
result.colorSpace = other.colorSpace
result.width = other.width
result.height = other.height
result.channels = other.channels
}
function parseFlags (flags, options) {
if (typeof options !== 'object' || !options) {
return
}
if ('premultiplyAlpha' in options) {
check.type(options.premultiplyAlpha, 'boolean',
'invalid premultiplyAlpha')
flags.premultiplyAlpha = options.premultiplyAlpha
}
if ('flipY' in options) {
check.type(options.flipY, 'boolean',
'invalid texture flip')
flags.flipY = options.flipY
}
if ('alignment' in options) {
check.oneOf(options.alignment, [1, 2, 4, 8],
'invalid texture unpack alignment')
flags.unpackAlignment = options.alignment
}
if ('colorSpace' in options) {
check.parameter(options.colorSpace, colorSpace,
'invalid colorSpace')
flags.colorSpace = colorSpace[options.colorSpace]
}
if ('type' in options) {
var type = options.type
check(extensions.oes_texture_float ||
!(type === 'float' || type === 'float32'),
'you must enable the OES_texture_float extension in order to use floating point textures.')
check(extensions.oes_texture_half_float ||
!(type === 'half float' || type === 'float16'),
'you must enable the OES_texture_half_float extension in order to use 16-bit floating point textures.')
check(extensions.webgl_depth_texture ||
!(type === 'depth' || type === 'depth stencil'),
'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')
check.parameter(type, textureTypes,
'invalid texture type')
flags.type = textureTypes[type]
}
var w = flags.width
var h = flags.height
var c = flags.channels
var hasChannels = false
if ('shape' in options) {
check(Array.isArray(options.shape) && options.shape.length >= 2,
'shape must be an array')
w = options.shape[0]
h = options.shape[1]
if (options.shape.length === 3) {
c = options.shape[2]
check(c > 0 && c <= 4, 'invalid number of channels')
hasChannels = true
}
check(w >= 0 && w <= limits.maxTextureSize, 'invalid width')
check(h >= 0 && h <= limits.maxTextureSize, 'invalid height')
} else {
if ('radius' in options) {
w = h = options.radius
check(w >= 0 && w <= limits.maxTextureSize, 'invalid radius')
}
if ('width' in options) {
w = options.width
check(w >= 0 && w <= limits.maxTextureSize, 'invalid width')
}
if ('height' in options) {
h = options.height
check(h >= 0 && h <= limits.maxTextureSize, 'invalid height')
}
if ('channels' in options) {
c = options.channels
check(c > 0 && c <= 4, 'invalid number of channels')
hasChannels = true
}
}
flags.width = w | 0
flags.height = h | 0
flags.channels = c | 0
var hasFormat = false
if ('format' in options) {
var formatStr = options.format
check(extensions.webgl_depth_texture ||
!(formatStr === 'depth' || formatStr === 'depth stencil'),
'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')
check.parameter(formatStr, textureFormats,
'invalid texture format')
var internalformat = flags.internalformat = textureFormats[formatStr]
flags.format = colorFormats[internalformat]
if (formatStr in textureTypes) {
if (!('type' in options)) {
flags.type = textureTypes[formatStr]
}
}
if (formatStr in compressedTextureFormats) {
flags.compressed = true
}
hasFormat = true
}
// Reconcile channels and format
if (!hasChannels && hasFormat) {
flags.channels = FORMAT_CHANNELS[flags.format]
} else if (hasChannels && !hasFormat) {
if (flags.channels !== CHANNELS_FORMAT[flags.format]) {
flags.format = flags.internalformat = CHANNELS_FORMAT[flags.channels]
}
} else if (hasFormat && hasChannels) {
check(
flags.channels === FORMAT_CHANNELS[flags.format],
'number of channels inconsistent with specified format')
}
}
function setFlags (flags) {
gl.pixelStorei(GL_UNPACK_FLIP_Y_WEBGL, flags.flipY)
gl.pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL, flags.premultiplyAlpha)
gl.pixelStorei(GL_UNPACK_COLORSPACE_CONVERSION_WEBGL, flags.colorSpace)
gl.pixelStorei(GL_UNPACK_ALIGNMENT, flags.unpackAlignment)
}
// -------------------------------------------------------
// Tex image data
// -------------------------------------------------------
function TexImage () {
TexFlags.call(this)
this.xOffset = 0
this.yOffset = 0
// data
this.data = null
this.needsFree = false
// html element
this.element = null
// copyTexImage info
this.needsCopy = false
}
function parseImage (image, options) {
var data = null
if (isPixelData(options)) {
data = options
} else if (options) {
check.type(options, 'object', 'invalid pixel data type')
parseFlags(image, options)
if ('x' in options) {
image.xOffset = options.x | 0
}
if ('y' in options) {
image.yOffset = options.y | 0
}
if (isPixelData(options.data)) {
data = options.data
}
}
check(
!image.compressed ||
data instanceof Uint8Array,
'compressed texture data must be stored in a uint8array')
if (options.copy) {
check(!data, 'can not specify copy and data field for the same texture')
var viewW = contextState.viewportWidth
var viewH = contextState.viewportHeight
image.width = image.width || (viewW - image.xOffset)
image.height = image.height || (viewH - image.yOffset)
image.needsCopy = true
check(image.xOffset >= 0 && image.xOffset < viewW &&
image.yOffset >= 0 && image.yOffset < viewH &&
image.width > 0 && image.width <= viewW &&
image.height > 0 && image.height <= viewH,
'copy texture read out of bounds')
} else if (!data) {
image.width = image.width || 1
image.height = image.height || 1
} else if (isTypedArray(data)) {
image.data = data
if (!('type' in options) && image.type === GL_UNSIGNED_BYTE) {
image.type = typedArrayCode(data)
}
} else if (isNumericArray(data)) {
convertData(image, data)
image.alignment = 1
image.needsFree = true
} else if (isNDArrayLike(data)) {
var array = data.data
if (!Array.isArray(array) && image.type === GL_UNSIGNED_BYTE) {
image.type = typedArrayCode(array)
}
var shape = data.shape
var stride = data.stride
var shapeX, shapeY, shapeC, strideX, strideY, strideC
if (shape.length === 3) {
shapeC = shape[2]
strideC = stride[2]
} else {
check(shape.length === 2, 'invalid ndarray pixel data, must be 2 or 3D')
shapeC = 1
strideC = 1
}
shapeX = shape[0]
shapeY = shape[1]
strideX = stride[0]
strideY = stride[1]
image.alignment = 1
image.width = shapeX
image.height = shapeY
image.channels = shapeC
image.format = image.internalformat = CHANNELS_FORMAT[shapeC]
image.needsFree = true
transposeData(image, array, strideX, strideY, strideC, data.offset)
} else if (isCanvasElement(data) || isContext2D(data)) {
if (isCanvasElement(data)) {
image.element = data
} else {
image.element = data.canvas
}
image.width = image.element.width
image.height = image.element.height
} else if (isImageElement(data)) {
image.element = data
image.width = data.naturalWidth
image.height = data.naturalHeight
} else if (isVideoElement(data)) {
image.element = data
image.width = data.videoWidth
image.height = data.videoHeight
image.needsPoll = true
} else if (isRectArray(data)) {
var w = data[0].length
var h = data.length
var c = 1
if (isArrayLike(data[0][0])) {
c = data[0][0].length
flatten3DData(image, data, w, h, c)
} else {
flatten2DData(image, data, w, h)
}
image.alignment = 1
image.width = w
image.height = h
image.channels = c
image.format = image.internalformat = CHANNELS_FORMAT[c]
image.needsFree = true
}
if (image.type === GL_FLOAT) {
check(limits.extensions.indexOf('oes_texture_float') >= 0,
'oes_texture_float extension not enabled')
} else if (image.type === GL_HALF_FLOAT_OES) {
check(limits.extensions.indexOf('oes_texture_half_float') >= 0,
'oes_texture_half_float extension not enabled')
}
// do compressed texture validation here.
}
function setImage (info, target, miplevel) {
var element = info.element
var data = info.data
var internalformat = info.internalformat
var format = info.format
var type = info.type
var width = info.width
var height = info.height
setFlags(info)
if (element) {
gl.texImage2D(target, miplevel, format, format, type, element)
} else if (info.compressed) {
gl.compressedTexImage2D(target, miplevel, internalformat, width, height, 0, data)
} else if (info.needsCopy) {
reglPoll()
gl.copyTexImage2D(
target, miplevel, format, info.xOffset, info.yOffset, width, height, 0)
} else {
gl.texImage2D(
target, miplevel, format, width, height, 0, format, type, data)
}
}
function setSubImage (info, target, x, y, miplevel) {
var element = info.element
var data = info.data
var internalformat = info.internalformat
var format = info.format
var type = info.type
var width = info.width
var height = info.height
setFlags(info)
if (element) {
gl.texSubImage2D(
target, miplevel, x, y, format, type, element)
} else if (info.compressed) {
gl.compressedTexSubImage2D(
target, miplevel, x, y, internalformat, width, height, data)
} else if (info.needsCopy) {
reglPoll()
gl.copyTexSubImage2D(
target, miplevel, x, y, info.xOffset, info.yOffset, width, height)
} else {
gl.texSubImage2D(
target, miplevel, x, y, width, height, format, type, data)
}
}
// texImage pool
var imagePool = []
function allocImage () {
return imagePool.pop() || new TexImage()
}
function freeImage (image) {
if (image.needsFree) {
pool.freeType(image.data)
}
TexImage.call(image)
imagePool.push(image)
}
// -------------------------------------------------------
// Mip map
// -------------------------------------------------------
function MipMap () {
TexFlags.call(this)
this.genMipmaps = false
this.mipmapHint = GL_DONT_CARE
this.mipmask = 0
this.images = Array(16)
}
function parseMipMapFromShape (mipmap, width, height) {
var img = mipmap.images[0] = allocImage()
mipmap.mipmask = 1
img.width = mipmap.width = width
img.height = mipmap.height = height
}
function parseMipMapFromObject (mipmap, options) {
var imgData = null
if (isPixelData(options)) {
imgData = mipmap.images[0] = allocImage()
copyFlags(imgData, mipmap)
parseImage(imgData, options)
mipmap.mipmask = 1
} else {
parseFlags(mipmap, options)
if (Array.isArray(options.mipmap)) {
var mipData = options.mipmap
for (var i = 0; i < mipData.length; ++i) {
imgData = mipmap.images[i] = allocImage()
copyFlags(imgData, mipmap)
imgData.width >>= i
imgData.height >>= i
parseImage(imgData, mipData[i])
mipmap.mipmask |= (1 << i)
}
} else {
imgData = mipmap.images[0] = allocImage()
copyFlags(imgData, mipmap)
parseImage(imgData, options)
mipmap.mipmask = 1
}
}
copyFlags(mipmap, mipmap.images[0])
// For textures of the compressed format WEBGL_compressed_texture_s3tc
// we must have that
//
// "When level equals zero width and height must be a multiple of 4.
// When level is greater than 0 width and height must be 0, 1, 2 or a multiple of 4. "
//
// but we do not yet support having multiple mipmap levels for compressed textures,
// so we only test for level zero.
if (mipmap.compressed &&
(mipmap.internalformat === GL_COMPRESSED_RGB_S3TC_DXT1_EXT) ||
(mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) ||
(mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT3_EXT) ||
(mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)) {
check(mipmap.width % 4 === 0 &&
mipmap.height % 4 === 0,
'for compressed texture formats, mipmap level 0 must have width and height that are a multiple of 4')
}
}
function setMipMap (mipmap, target) {
var images = mipmap.images
for (var i = 0; i < images.length; ++i) {
if (!images[i]) {
return
}
setImage(images[i], target, i)
}
}
var mipPool = []
function allocMipMap () {
var result = mipPool.pop() || new MipMap()
TexFlags.call(result)
result.mipmask = 0
for (var i = 0; i < 16; ++i) {
result.images[i] = null
}
return result
}
function freeMipMap (mipmap) {
var images = mipmap.images
for (var i = 0; i < images.length; ++i) {
if (images[i]) {
freeImage(images[i])
}
images[i] = null
}
mipPool.push(mipmap)
}
// -------------------------------------------------------
// Tex info
// -------------------------------------------------------
function TexInfo () {
this.minFilter = GL_NEAREST
this.magFilter = GL_NEAREST
this.wrapS = GL_CLAMP_TO_EDGE
this.wrapT = GL_CLAMP_TO_EDGE
this.anisotropic = 1
this.genMipmaps = false
this.mipmapHint = GL_DONT_CARE
}
function parseTexInfo (info, options) {
if ('min' in options) {
var minFilter = options.min
check.parameter(minFilter, minFilters)
info.minFilter = minFilters[minFilter]
if (MIPMAP_FILTERS.indexOf(info.minFilter) >= 0) {
info.genMipmaps = true
}
}
if ('mag' in options) {
var magFilter = options.mag
check.parameter(magFilter, magFilters)
info.magFilter = magFilters[magFilter]
}
var wrapS = info.wrapS
var wrapT = info.wrapT
if ('wrap' in options) {
var wrap = options.wrap
if (typeof wrap === 'string') {
check.parameter(wrap, wrapModes)
wrapS = wrapT = wrapModes[wrap]
} else if (Array.isArray(wrap)) {
check.parameter(wrap[0], wrapModes)
check.parameter(wrap[1], wrapModes)
wrapS = wrapModes[wrap[0]]
wrapT = wrapModes[wrap[1]]
}
} else {
if ('wrapS' in options) {
var optWrapS = options.wrapS
check.parameter(optWrapS, wrapModes)
wrapS = wrapModes[optWrapS]
}
if ('wrapT' in options) {
var optWrapT = options.wrapT
check.parameter(optWrapT, wrapModes)
wrapT = wrapModes[optWrapT]
}
}
info.wrapS = wrapS
info.wrapT = wrapT
if ('anisotropic' in options) {
var anisotropic = options.anisotropic
check(typeof anisotropic === 'number' &&
anisotropic >= 1 && anisotropic <= limits.maxAnisotropic,
'aniso samples must be between 1 and ')
info.anisotropic = options.anisotropic
}
if ('mipmap' in options) {
var hasMipMap = false
switch (typeof options.mipmap) {
case 'string':
check.parameter(options.mipmap, mipmapHint,
'invalid mipmap hint')
info.mipmapHint = mipmapHint[options.mipmap]
info.genMipmaps = true
hasMipMap = true
break
case 'boolean':
hasMipMap = info.genMipmaps = options.mipmap
break
case 'object':
check(Array.isArray(options.mipmap), 'invalid mipmap type')
info.genMipmaps = false
hasMipMap = true
break
default:
check.raise('invalid mipmap type')
}
if (hasMipMap && !('min' in options)) {
info.minFilter = GL_NEAREST_MIPMAP_NEAREST
}
}
}
function setTexInfo (info, target) {
gl.texParameteri(target, GL_TEXTURE_MIN_FILTER, info.minFilter)
gl.texParameteri(target, GL_TEXTURE_MAG_FILTER, info.magFilter)
gl.texParameteri(target, GL_TEXTURE_WRAP_S, info.wrapS)
gl.texParameteri(target, GL_TEXTURE_WRAP_T, info.wrapT)
if (extensions.ext_texture_filter_anisotropic) {
gl.texParameteri(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, info.anisotropic)
}
if (info.genMipmaps) {
gl.hint(GL_GENERATE_MIPMAP_HINT, info.mipmapHint)
gl.generateMipmap(target)
}
}
// -------------------------------------------------------
// Full texture object
// -------------------------------------------------------
var textureCount = 0
var textureSet = {}
var numTexUnits = limits.maxTextureUnits
var textureUnits = Array(numTexUnits).map(function () {
return null
})
function REGLTexture (target) {
TexFlags.call(this)
this.mipmask = 0
this.internalformat = GL_RGBA
this.id = textureCount++
this.refCount = 1
this.target = target
this.texture = gl.createTexture()
this.unit = -1
this.bindCount = 0
this.texInfo = new TexInfo()
if (config.profile) {
this.stats = {size: 0}
}
}
function tempBind (texture) {
gl.activeTexture(GL_TEXTURE0)
gl.bindTexture(texture.target, texture.texture)
}
function tempRestore () {
var prev = textureUnits[0]
if (prev) {
gl.bindTexture(prev.target, prev.texture)
} else {
gl.bindTexture(GL_TEXTURE_2D, null)
}
}
function destroy (texture) {
var handle = texture.texture
check(handle, 'must not double destroy texture')
var unit = texture.unit
var target = texture.target
if (unit >= 0) {
gl.activeTexture(GL_TEXTURE0 + unit)
gl.bindTexture(target, null)
textureUnits[unit] = null
}
gl.deleteTexture(handle)
texture.texture = null
texture.params = null
texture.pixels = null
texture.refCount = 0
delete textureSet[texture.id]
stats.textureCount--
}
extend(REGLTexture.prototype, {
bind: function () {
var texture = this
texture.bindCount += 1
var unit = texture.unit
if (unit < 0) {
for (var i = 0; i < numTexUnits; ++i) {
var other = textureUnits[i]
if (other) {
if (other.bindCount > 0) {
continue
}
other.unit = -1
}
textureUnits[i] = texture
unit = i
break
}
if (unit >= numTexUnits) {
check.raise('insufficient number of texture units')
}
if (config.profile && stats.maxTextureUnits < (unit + 1)) {
stats.maxTextureUnits = unit + 1 // +1, since the units are zero-based
}
texture.unit = unit
gl.activeTexture(GL_TEXTURE0 + unit)
gl.bindTexture(texture.target, texture.texture)
}
return unit
},
unbind: function () {
this.bindCount -= 1
},
decRef: function () {
if (--this.refCount <= 0) {
destroy(this)
}
}
})
function createTexture2D (a, b) {
var texture = new REGLTexture(GL_TEXTURE_2D)
textureSet[texture.id] = texture
stats.textureCount++
function reglTexture2D (a, b) {
var texInfo = texture.texInfo
TexInfo.call(texInfo)
var mipData = allocMipMap()
if (typeof a === 'number') {
if (typeof b === 'number') {
parseMipMapFromShape(mipData, a | 0, b | 0)
} else {
parseMipMapFromShape(mipData, a | 0, a | 0)
}
} else if (a) {
check.type(a, 'object', 'invalid arguments to regl.texture')
parseTexInfo(texInfo, a)
parseMipMapFromObject(mipData, a)
} else {
// empty textures get assigned a default shape of 1x1
parseMipMapFromShape(mipData, 1, 1)
}
if (texInfo.genMipmaps) {
mipData.mipmask = (mipData.width << 1) - 1
}
texture.mipmask = mipData.mipmask
copyFlags(texture, mipData)
check.texture2D(texInfo, mipData, limits)
texture.internalformat = mipData.internalformat
reglTexture2D.width = mipData.width
reglTexture2D.height = mipData.height
tempBind(texture)
setMipMap(mipData, GL_TEXTURE_2D)
setTexInfo(texInfo, GL_TEXTURE_2D)
tempRestore()
freeMipMap(mipData)
if (config.profile) {
texture.stats.size = getTextureSize(
texture.internalformat,
texture.type,
mipData.width,
mipData.height,
texInfo.genMipmaps,
false)
}
reglTexture2D.format = textureFormatsInvert[texture.internalformat]
reglTexture2D.type = textureTypesInvert[texture.type]
reglTexture2D.mag = magFiltersInvert[texInfo.magFilter]
reglTexture2D.min = minFiltersInvert[texInfo.minFilter]
reglTexture2D.wrapS = wrapModesInvert[texInfo.wrapS]
reglTexture2D.wrapT = wrapModesInvert[texInfo.wrapT]
return reglTexture2D
}
function subimage (image, x_, y_, level_) {
check(!!image, 'must specify image data')
var x = x_ | 0
var y = y_ | 0
var level = level_ | 0
var imageData = allocImage()
copyFlags(imageData, texture)
imageData.width >>= level
imageData.height >>= level
imageData.width -= x
imageData.height -= y
parseImage(imageData, image)
check(
texture.type === imageData.type &&
texture.format === imageData.format &&
texture.internalformat === imageData.internalformat,
'incompatible format for texture.subimage')
check(
x >= 0 && y >= 0 &&
x + imageData.width <= texture.width &&
y + imageData.height <= texture.height,
'texture.subimage write out of bounds')
check(
texture.mipmask & (1 << level),
'missing mipmap data')
check(
imageData.data || imageData.element || imageData.needsCopy,
'missing image data')
tempBind(texture)
setSubImage(imageData, GL_TEXTURE_2D, x, y, level)
tempRestore()
freeImage(imageData)
return reglTexture2D
}
function resize (w_, h_) {
var w = w_ | 0
var h = (h_ | 0) || w
if (w === texture.width && h === texture.height) {
return reglTexture2D
}
reglTexture2D.width = texture.width = w
reglTexture2D.height = texture.height = h
tempBind(texture)
for (var i = 0; texture.mipmask >> i; ++i) {
gl.texImage2D(
GL_TEXTURE_2D,
i,
texture.format,
w >> i,
h >> i,
0,
texture.format,
texture.type,
null)
}
tempRestore()
// also, recompute the texture size.
if (config.profile) {
texture.stats.size = getTextureSize(
texture.internalformat,
texture.type,
w,
h,
false,
false)
}
return reglTexture2D
}
reglTexture2D(a, b)
reglTexture2D.subimage = subimage
reglTexture2D.resize = resize
reglTexture2D._reglType = 'texture2d'
reglTexture2D._texture = texture
if (config.profile) {
reglTexture2D.stats = texture.stats
}
reglTexture2D.destroy = function () {
texture.decRef()
}
return reglTexture2D
}
function createTextureCube (a0, a1, a2, a3, a4, a5) {
var texture = new REGLTexture(GL_TEXTURE_CUBE_MAP)
textureSet[texture.id] = texture
stats.cubeCount++
var faces = new Array(6)
function reglTextureCube (a0, a1, a2, a3, a4, a5) {
var i
var texInfo = texture.texInfo
TexInfo.call(texInfo)
for (i = 0; i < 6; ++i) {
faces[i] = allocMipMap()
}
if (typeof a0 === 'number' || !a0) {
var s = (a0 | 0) || 1
for (i = 0; i < 6; ++i) {
parseMipMapFromShape(faces[i], s, s)
}
} else if (typeof a0 === 'object') {
if (a1) {
parseMipMapFromObject(faces[0], a0)
parseMipMapFromObject(faces[1], a1)
parseMipMapFromObject(faces[2], a2)
parseMipMapFromObject(faces[3], a3)
parseMipMapFromObject(faces[4], a4)
parseMipMapFromObject(faces[5], a5)
} else {
parseTexInfo(texInfo, a0)
parseFlags(texture, a0)
if ('faces' in a0) {
var face_input = a0.faces
check(Array.isArray(face_input) && face_input.length === 6,
'cube faces must be a length 6 array')
for (i = 0; i < 6; ++i) {
check(typeof face_input[i] === 'object' && !!face_input[i],
'invalid input for cube map face')
copyFlags(faces[i], texture)
parseMipMapFromObject(faces[i], face_input[i])
}
} else {
for (i = 0; i < 6; ++i) {
parseMipMapFromObject(faces[i], a0)
}
}
}
} else {
check.raise('invalid arguments to cube map')
}
copyFlags(texture, faces[0])
if (texInfo.genMipmaps) {
texture.mipmask = (faces[0].width << 1) - 1
} else {
texture.mipmask = faces[0].mipmask
}
check.textureCube(texture, texInfo, faces, limits)
texture.internalformat = faces[0].internalformat
reglTextureCube.width = faces[0].width
reglTextureCube.height = faces[0].height
tempBind(texture)
for (i = 0; i < 6; ++i) {
setMipMap(faces[i], GL_TEXTURE_CUBE_MAP_POSITIVE_X + i)
}
setTexInfo(texInfo, GL_TEXTURE_CUBE_MAP)
tempRestore()
if (config.profile) {
texture.stats.size = getTextureSize(
texture.internalformat,
texture.type,
reglTextureCube.width,
reglTextureCube.height,
texInfo.genMipmaps,
true)
}
reglTextureCube.format = textureFormatsInvert[texture.internalformat]
reglTextureCube.type = textureTypesInvert[texture.type]
reglTextureCube.mag = magFiltersInvert[texInfo.magFilter]
reglTextureCube.min = minFiltersInvert[texInfo.minFilter]
reglTextureCube.wrapS = wrapModesInvert[texInfo.wrapS]
reglTextureCube.wrapT = wrapModesInvert[texInfo.wrapT]
for (i = 0; i < 6; ++i) {
freeMipMap(faces[i])
}
return reglTextureCube
}
function subimage (face, image, x_, y_, level_) {
check(!!image, 'must specify image data')
check(typeof face === 'number' && face === (face | 0) &&
face >= 0 && face < 6, 'invalid face')
var x = x_ | 0
var y = y_ | 0
var level = level_ | 0
var imageData = allocImage()
copyFlags(imageData, texture)
imageData.width >>= level
imageData.height >>= level
imageData.width -= x
imageData.height -= y
parseImage(imageData, image)
check(
texture.type === imageData.type &&
texture.format === imageData.format &&
texture.internalformat === imageData.internalformat,
'incompatible format for texture.subimage')
check(
x >= 0 && y >= 0 &&
x + imageData.width <= texture.width &&
y + imageData.height <= texture.height,
'texture.subimage write out of bounds')
check(
texture.mipmask & (1 << level),
'missing mipmap data')
check(
imageData.data || imageData.element || imageData.needsCopy,
'missing image data')
tempBind(texture)
setSubImage(imageData, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, x, y, level)
tempRestore()
freeImage(imageData)
return reglTextureCube
}
function resize (radius_) {
var radius = radius_ | 0
if (radius === texture.width) {
return
}
reglTextureCube.width = texture.width = radius
reglTextureCube.height = texture.height = radius
tempBind(texture)
for (var i = 0; i < 6; ++i) {
for (var j = 0; texture.mipmask >> j; ++j) {
gl.texImage2D(
GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
j,
texture.format,
radius >> j,
radius >> j,
0,
texture.format,
texture.type,
null)
}
}
tempRestore()
if (config.profile) {
texture.stats.size = getTextureSize(
texture.internalformat,
texture.type,
reglTextureCube.width,
reglTextureCube.height,
false,
true)
}
return reglTextureCube
}
reglTextureCube(a0, a1, a2, a3, a4, a5)
reglTextureCube.subimage = subimage
reglTextureCube.resize = resize
reglTextureCube._reglType = 'textureCube'
reglTextureCube._texture = texture
if (config.profile) {
reglTextureCube.stats = texture.stats
}
reglTextureCube.destroy = function () {
texture.decRef()
}
return reglTextureCube
}
// Called when regl is destroyed
function destroyTextures () {
for (var i = 0; i < numTexUnits; ++i) {
gl.activeTexture(GL_TEXTURE0 + i)
gl.bindTexture(GL_TEXTURE_2D, null)
textureUnits[i] = null
}
values(textureSet).forEach(destroy)
stats.cubeCount = 0
stats.textureCount = 0
}
if (config.profile) {
stats.getTotalTextureSize = function () {
var total = 0
Object.keys(textureSet).forEach(function (key) {
total += textureSet[key].stats.size
})
return total
}
}
function restoreTextures () {
values(textureSet).forEach(function (texture) {
texture.texture = gl.createTexture()
gl.bindTexture(texture.target, texture.texture)
for (var i = 0; i < 32; ++i) {
if ((texture.mipmask & (1 << i)) === 0) {
continue
}
if (texture.target === GL_TEXTURE_2D) {
gl.texImage2D(GL_TEXTURE_2D,
i,
texture.internalformat,
texture.width >> i,
texture.height >> i,
0,
texture.internalformat,
texture.type,
null)
} else {
for (var j = 0; j < 6; ++j) {
gl.texImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + j,
i,
texture.internalformat,
texture.width >> i,
texture.height >> i,
0,
texture.internalformat,
texture.type,
null)
}
}
}
setTexInfo(texture.texInfo, texture.target)
})
}
return {
create2D: createTexture2D,
createCube: createTextureCube,
clear: destroyTextures,
getTexture: function (wrapper) {
return null
},
restore: restoreTextures
}
}
},{"./constants/arraytypes.json":3,"./util/check":20,"./util/extend":23,"./util/is-array-like":24,"./util/is-ndarray":25,"./util/is-typed-array":26,"./util/pool":28,"./util/to-half-float":30,"./util/values":31}],19:[function(require,module,exports){
var GL_QUERY_RESULT_EXT = 0x8866
var GL_QUERY_RESULT_AVAILABLE_EXT = 0x8867
var GL_TIME_ELAPSED_EXT = 0x88BF
module.exports = function (gl, extensions) {
var extTimer = extensions.ext_disjoint_timer_query
if (!extTimer) {
return null
}
// QUERY POOL BEGIN
var queryPool = []
function allocQuery () {
return queryPool.pop() || extTimer.createQueryEXT()
}
function freeQuery (query) {
queryPool.push(query)
}
// QUERY POOL END
var pendingQueries = []
function beginQuery (stats) {
var query = allocQuery()
extTimer.beginQueryEXT(GL_TIME_ELAPSED_EXT, query)
pendingQueries.push(query)
pushScopeStats(pendingQueries.length - 1, pendingQueries.length, stats)
}
function endQuery () {
extTimer.endQueryEXT(GL_TIME_ELAPSED_EXT)
}
//
// Pending stats pool.
//
function PendingStats () {
this.startQueryIndex = -1
this.endQueryIndex = -1
this.sum = 0
this.stats = null
}
var pendingStatsPool = []
function allocPendingStats () {
return pendingStatsPool.pop() || new PendingStats()
}
function freePendingStats (pendingStats) {
pendingStatsPool.push(pendingStats)
}
// Pending stats pool end
var pendingStats = []
function pushScopeStats (start, end, stats) {
var ps = allocPendingStats()
ps.startQueryIndex = start
ps.endQueryIndex = end
ps.sum = 0
ps.stats = stats
pendingStats.push(ps)
}
// we should call this at the beginning of the frame,
// in order to update gpuTime
var timeSum = []
var queryPtr = []
function update () {
var ptr, i
var n = pendingQueries.length
if (n === 0) {
return
}
// Reserve space
queryPtr.length = Math.max(queryPtr.length, n + 1)
timeSum.length = Math.max(timeSum.length, n + 1)
timeSum[0] = 0
queryPtr[0] = 0
// Update all pending timer queries
var queryTime = 0
ptr = 0
for (i = 0; i < pendingQueries.length; ++i) {
var query = pendingQueries[i]
if (extTimer.getQueryObjectEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT)) {
queryTime += extTimer.getQueryObjectEXT(query, GL_QUERY_RESULT_EXT)
freeQuery(query)
} else {
pendingQueries[ptr++] = query
}
timeSum[i + 1] = queryTime
queryPtr[i + 1] = ptr
}
pendingQueries.length = ptr
// Update all pending stat queries
ptr = 0
for (i = 0; i < pendingStats.length; ++i) {
var stats = pendingStats[i]
var start = stats.startQueryIndex
var end = stats.endQueryIndex
stats.sum += timeSum[end] - timeSum[start]
var startPtr = queryPtr[start]
var endPtr = queryPtr[end]
if (endPtr === startPtr) {
stats.stats.gpuTime += stats.sum / 1e6
freePendingStats(stats)
} else {
stats.startQueryIndex = startPtr
stats.endQueryIndex = endPtr
pendingStats[ptr++] = stats
}
}
pendingStats.length = ptr
}
return {
beginQuery: beginQuery,
endQuery: endQuery,
pushScopeStats: pushScopeStats,
update: update,
getNumPendingQueries: function () {
return pendingQueries.length
},
clear: function () {
queryPool.push.apply(queryPool, pendingQueries)
for (var i = 0; i < queryPool.length; i++) {
extTimer.deleteQueryEXT(queryPool[i])
}
pendingQueries.length = 0
queryPool.length = 0
},
restore: function () {
pendingQueries.length = 0
queryPool.length = 0
}
}
}
},{}],20:[function(require,module,exports){
// Error checking and parameter validation.
//
// Statements for the form `check.someProcedure(...)` get removed by
// a browserify transform for optimized/minified bundles.
//
/* globals btoa */
var isTypedArray = require('./is-typed-array')
var extend = require('./extend')
// only used for extracting shader names. if btoa not present, then errors
// will be slightly crappier
function decodeB64 (str) {
if (typeof btoa !== 'undefined') {
return btoa(str)
}
return 'base64:' + str
}
function raise (message) {
var error = new Error('(regl) ' + message)
console.error(error)
throw error
}
function check (pred, message) {
if (!pred) {
raise(message)
}
}
function encolon (message) {
if (message) {
return ': ' + message
}
return ''
}
function checkParameter (param, possibilities, message) {
if (!(param in possibilities)) {
raise('unknown parameter (' + param + ')' + encolon(message) +
'. possible values: ' + Object.keys(possibilities).join())
}
}
function checkIsTypedArray (data, message) {
if (!isTypedArray(data)) {
raise(
'invalid parameter type' + encolon(message) +
'. must be a typed array')
}
}
function checkTypeOf (value, type, message) {
if (typeof value !== type) {
raise(
'invalid parameter type' + encolon(message) +
'. expected ' + type + ', got ' + (typeof value))
}
}
function checkNonNegativeInt (value, message) {
if (!((value >= 0) &&
((value | 0) === value))) {
raise('invalid parameter type, (' + value + ')' + encolon(message) +
'. must be a nonnegative integer')
}
}
function checkOneOf (value, list, message) {
if (list.indexOf(value) < 0) {
raise('invalid value' + encolon(message) + '. must be one of: ' + list)
}
}
var constructorKeys = [
'gl',
'canvas',
'container',
'attributes',
'pixelRatio',
'extensions',
'optionalExtensions',
'profile',
'onDone'
]
function checkConstructor (obj) {
Object.keys(obj).forEach(function (key) {
if (constructorKeys.indexOf(key) < 0) {
raise('invalid regl constructor argument "' + key + '". must be one of ' + constructorKeys)
}
})
}
function leftPad (str, n) {
str = str + ''
while (str.length < n) {
str = ' ' + str
}
return str
}
function ShaderFile () {
this.name = 'unknown'
this.lines = []
this.index = {}
this.hasErrors = false
}
function ShaderLine (number, line) {
this.number = number
this.line = line
this.errors = []
}
function ShaderError (fileNumber, lineNumber, message) {
this.file = fileNumber
this.line = lineNumber
this.message = message
}
function guessCommand () {
var error = new Error()
var stack = (error.stack || error).toString()
var pat = /compileProcedure.*\n\s*at.*\((.*)\)/.exec(stack)
if (pat) {
return pat[1]
}
var pat2 = /compileProcedure.*\n\s*at\s+(.*)(\n|$)/.exec(stack)
if (pat2) {
return pat2[1]
}
return 'unknown'
}
function guessCallSite () {
var error = new Error()
var stack = (error.stack || error).toString()
var pat = /at REGLCommand.*\n\s+at.*\((.*)\)/.exec(stack)
if (pat) {
return pat[1]
}
var pat2 = /at REGLCommand.*\n\s+at\s+(.*)\n/.exec(stack)
if (pat2) {
return pat2[1]
}
return 'unknown'
}
function parseSource (source, command) {
var lines = source.split('\n')
var lineNumber = 1
var fileNumber = 0
var files = {
unknown: new ShaderFile(),
0: new ShaderFile()
}
files.unknown.name = files[0].name = command || guessCommand()
files.unknown.lines.push(new ShaderLine(0, ''))
for (var i = 0; i < lines.length; ++i) {
var line = lines[i]
var parts = /^\s*\#\s*(\w+)\s+(.+)\s*$/.exec(line)
if (parts) {
switch (parts[1]) {
case 'line':
var lineNumberInfo = /(\d+)(\s+\d+)?/.exec(parts[2])
if (lineNumberInfo) {
lineNumber = lineNumberInfo[1] | 0
if (lineNumberInfo[2]) {
fileNumber = lineNumberInfo[2] | 0
if (!(fileNumber in files)) {
files[fileNumber] = new ShaderFile()
}
}
}
break
case 'define':
var nameInfo = /SHADER_NAME(_B64)?\s+(.*)$/.exec(parts[2])
if (nameInfo) {
files[fileNumber].name = (nameInfo[1]
? decodeB64(nameInfo[2])
: nameInfo[2])
}
break
}
}
files[fileNumber].lines.push(new ShaderLine(lineNumber++, line))
}
Object.keys(files).forEach(function (fileNumber) {
var file = files[fileNumber]
file.lines.forEach(function (line) {
file.index[line.number] = line
})
})
return files
}
function parseErrorLog (errLog) {
var result = []
errLog.split('\n').forEach(function (errMsg) {
if (errMsg.length < 5) {
return
}
var parts = /^ERROR\:\s+(\d+)\:(\d+)\:\s*(.*)$/.exec(errMsg)
if (parts) {
result.push(new ShaderError(
parts[1] | 0,
parts[2] | 0,
parts[3].trim()))
} else if (errMsg.length > 0) {
result.push(new ShaderError('unknown', 0, errMsg))
}
})
return result
}
function annotateFiles (files, errors) {
errors.forEach(function (error) {
var file = files[error.file]
if (file) {
var line = file.index[error.line]
if (line) {
line.errors.push(error)
file.hasErrors = true
return
}
}
files.unknown.hasErrors = true
files.unknown.lines[0].errors.push(error)
})
}
function checkShaderError (gl, shader, source, type, command) {
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
var errLog = gl.getShaderInfoLog(shader)
var typeName = type === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex'
checkCommandType(source, 'string', typeName + ' shader source must be a string', command)
var files = parseSource(source, command)
var errors = parseErrorLog(errLog)
annotateFiles(files, errors)
Object.keys(files).forEach(function (fileNumber) {
var file = files[fileNumber]
if (!file.hasErrors) {
return
}
var strings = ['']
var styles = ['']
function push (str, style) {
strings.push(str)
styles.push(style || '')
}
push('file number ' + fileNumber + ': ' + file.name + '\n', 'color:red;text-decoration:underline;font-weight:bold')
file.lines.forEach(function (line) {
if (line.errors.length > 0) {
push(leftPad(line.number, 4) + '| ', 'background-color:yellow; font-weight:bold')
push(line.line + '\n', 'color:red; background-color:yellow; font-weight:bold')
// try to guess token
var offset = 0
line.errors.forEach(function (error) {
var message = error.message
var token = /^\s*\'(.*)\'\s*\:\s*(.*)$/.exec(message)
if (token) {
var tokenPat = token[1]
message = token[2]
switch (tokenPat) {
case 'assign':
tokenPat = '='
break
}
offset = Math.max(line.line.indexOf(tokenPat, offset), 0)
} else {
offset = 0
}
push(leftPad('| ', 6))
push(leftPad('^^^', offset + 3) + '\n', 'font-weight:bold')
push(leftPad('| ', 6))
push(message + '\n', 'font-weight:bold')
})
push(leftPad('| ', 6) + '\n')
} else {
push(leftPad(line.number, 4) + '| ')
push(line.line + '\n', 'color:red')
}
})
if (typeof document !== 'undefined') {
styles[0] = strings.join('%c')
console.log.apply(console, styles)
} else {
console.log(strings.join(''))
}
})
check.raise('Error compiling ' + typeName + ' shader, ' + files[0].name)
}
}
function checkLinkError (gl, program, fragShader, vertShader, command) {
if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
var errLog = gl.getProgramInfoLog(program)
var fragParse = parseSource(fragShader, command)
var vertParse = parseSource(vertShader, command)
var header = 'Error linking program with vertex shader, "' +
vertParse[0].name + '", and fragment shader "' + fragParse[0].name + '"'
if (typeof document !== 'undefined') {
console.log('%c' + header + '\n%c' + errLog,
'color:red;text-decoration:underline;font-weight:bold',
'color:red')
} else {
console.log(header + '\n' + errLog)
}
check.raise(header)
}
}
function saveCommandRef (object) {
object._commandRef = guessCommand()
}
function saveDrawCommandInfo (opts, uniforms, attributes, stringStore) {
saveCommandRef(opts)
function id (str) {
if (str) {
return stringStore.id(str)
}
return 0
}
opts._fragId = id(opts.static.frag)
opts._vertId = id(opts.static.vert)
function addProps (dict, set) {
Object.keys(set).forEach(function (u) {
dict[stringStore.id(u)] = true
})
}
var uniformSet = opts._uniformSet = {}
addProps(uniformSet, uniforms.static)
addProps(uniformSet, uniforms.dynamic)
var attributeSet = opts._attributeSet = {}
addProps(attributeSet, attributes.static)
addProps(attributeSet, attributes.dynamic)
opts._hasCount = (
'count' in opts.static ||
'count' in opts.dynamic ||
'elements' in opts.static ||
'elements' in opts.dynamic)
}
function commandRaise (message, command) {
var callSite = guessCallSite()
raise(message +
' in command ' + (command || guessCommand()) +
(callSite === 'unknown' ? '' : ' called from ' + callSite))
}
function checkCommand (pred, message, command) {
if (!pred) {
commandRaise(message, command || guessCommand())
}
}
function checkParameterCommand (param, possibilities, message, command) {
if (!(param in possibilities)) {
commandRaise(
'unknown parameter (' + param + ')' + encolon(message) +
'. possible values: ' + Object.keys(possibilities).join(),
command || guessCommand())
}
}
function checkCommandType (value, type, message, command) {
if (typeof value !== type) {
commandRaise(
'invalid parameter type' + encolon(message) +
'. expected ' + type + ', got ' + (typeof value),
command || guessCommand())
}
}
function checkOptional (block) {
block()
}
function checkFramebufferFormat (attachment, texFormats, rbFormats) {
if (attachment.texture) {
checkOneOf(
attachment.texture._texture.internalformat,
texFormats,
'unsupported texture format for attachment')
} else {
checkOneOf(
attachment.renderbuffer._renderbuffer.format,
rbFormats,
'unsupported renderbuffer format for attachment')
}
}
var GL_CLAMP_TO_EDGE = 0x812F
var GL_NEAREST = 0x2600
var GL_NEAREST_MIPMAP_NEAREST = 0x2700
var GL_LINEAR_MIPMAP_NEAREST = 0x2701
var GL_NEAREST_MIPMAP_LINEAR = 0x2702
var GL_LINEAR_MIPMAP_LINEAR = 0x2703
var GL_BYTE = 5120
var GL_UNSIGNED_BYTE = 5121
var GL_SHORT = 5122
var GL_UNSIGNED_SHORT = 5123
var GL_INT = 5124
var GL_UNSIGNED_INT = 5125
var GL_FLOAT = 5126
var GL_UNSIGNED_SHORT_4_4_4_4 = 0x8033
var GL_UNSIGNED_SHORT_5_5_5_1 = 0x8034
var GL_UNSIGNED_SHORT_5_6_5 = 0x8363
var GL_UNSIGNED_INT_24_8_WEBGL = 0x84FA
var GL_HALF_FLOAT_OES = 0x8D61
var TYPE_SIZE = {}
TYPE_SIZE[GL_BYTE] =
TYPE_SIZE[GL_UNSIGNED_BYTE] = 1
TYPE_SIZE[GL_SHORT] =
TYPE_SIZE[GL_UNSIGNED_SHORT] =
TYPE_SIZE[GL_HALF_FLOAT_OES] =
TYPE_SIZE[GL_UNSIGNED_SHORT_5_6_5] =
TYPE_SIZE[GL_UNSIGNED_SHORT_4_4_4_4] =
TYPE_SIZE[GL_UNSIGNED_SHORT_5_5_5_1] = 2
TYPE_SIZE[GL_INT] =
TYPE_SIZE[GL_UNSIGNED_INT] =
TYPE_SIZE[GL_FLOAT] =
TYPE_SIZE[GL_UNSIGNED_INT_24_8_WEBGL] = 4
function pixelSize (type, channels) {
if (type === GL_UNSIGNED_SHORT_5_5_5_1 ||
type === GL_UNSIGNED_SHORT_4_4_4_4 ||
type === GL_UNSIGNED_SHORT_5_6_5) {
return 2
} else if (type === GL_UNSIGNED_INT_24_8_WEBGL) {
return 4
} else {
return TYPE_SIZE[type] * channels
}
}
function isPow2 (v) {
return !(v & (v - 1)) && (!!v)
}
function checkTexture2D (info, mipData, limits) {
var i
var w = mipData.width
var h = mipData.height
var c = mipData.channels
// Check texture shape
check(w > 0 && w <= limits.maxTextureSize &&
h > 0 && h <= limits.maxTextureSize,
'invalid texture shape')
// check wrap mode
if (info.wrapS !== GL_CLAMP_TO_EDGE || info.wrapT !== GL_CLAMP_TO_EDGE) {
check(isPow2(w) && isPow2(h),
'incompatible wrap mode for texture, both width and height must be power of 2')
}
if (mipData.mipmask === 1) {
if (w !== 1 && h !== 1) {
check(
info.minFilter !== GL_NEAREST_MIPMAP_NEAREST &&
info.minFilter !== GL_NEAREST_MIPMAP_LINEAR &&
info.minFilter !== GL_LINEAR_MIPMAP_NEAREST &&
info.minFilter !== GL_LINEAR_MIPMAP_LINEAR,
'min filter requires mipmap')
}
} else {
// texture must be power of 2
check(isPow2(w) && isPow2(h),
'texture must be a square power of 2 to support mipmapping')
check(mipData.mipmask === (w << 1) - 1,
'missing or incomplete mipmap data')
}
if (mipData.type === GL_FLOAT) {
if (limits.extensions.indexOf('oes_texture_float_linear') < 0) {
check(info.minFilter === GL_NEAREST && info.magFilter === GL_NEAREST,
'filter not supported, must enable oes_texture_float_linear')
}
check(!info.genMipmaps,
'mipmap generation not supported with float textures')
}
// check image complete
var mipimages = mipData.images
for (i = 0; i < 16; ++i) {
if (mipimages[i]) {
var mw = w >> i
var mh = h >> i
check(mipData.mipmask & (1 << i), 'missing mipmap data')
var img = mipimages[i]
check(
img.width === mw &&
img.height === mh,
'invalid shape for mip images')
check(
img.format === mipData.format &&
img.internalformat === mipData.internalformat &&
img.type === mipData.type,
'incompatible type for mip image')
if (img.compressed) {
// TODO: check size for compressed images
} else if (img.data) {
check(img.data.byteLength === mw * mh *
Math.max(pixelSize(img.type, c), img.unpackAlignment),
'invalid data for image, buffer size is inconsistent with image format')
} else if (img.element) {
// TODO: check element can be loaded
} else if (img.copy) {
// TODO: check compatible format and type
}
} else if (!info.genMipmaps) {
check((mipData.mipmask & (1 << i)) === 0, 'extra mipmap data')
}
}
if (mipData.compressed) {
check(!info.genMipmaps,
'mipmap generation for compressed images not supported')
}
}
function checkTextureCube (texture, info, faces, limits) {
var w = texture.width
var h = texture.height
var c = texture.channels
// Check texture shape
check(
w > 0 && w <= limits.maxTextureSize && h > 0 && h <= limits.maxTextureSize,
'invalid texture shape')
check(
w === h,
'cube map must be square')
check(
info.wrapS === GL_CLAMP_TO_EDGE && info.wrapT === GL_CLAMP_TO_EDGE,
'wrap mode not supported by cube map')
for (var i = 0; i < faces.length; ++i) {
var face = faces[i]
check(
face.width === w && face.height === h,
'inconsistent cube map face shape')
if (info.genMipmaps) {
check(!face.compressed,
'can not generate mipmap for compressed textures')
check(face.mipmask === 1,
'can not specify mipmaps and generate mipmaps')
} else {
// TODO: check mip and filter mode
}
var mipmaps = face.images
for (var j = 0; j < 16; ++j) {
var img = mipmaps[j]
if (img) {
var mw = w >> j
var mh = h >> j
check(face.mipmask & (1 << j), 'missing mipmap data')
check(
img.width === mw &&
img.height === mh,
'invalid shape for mip images')
check(
img.format === texture.format &&
img.internalformat === texture.internalformat &&
img.type === texture.type,
'incompatible type for mip image')
if (img.compressed) {
// TODO: check size for compressed images
} else if (img.data) {
check(img.data.byteLength === mw * mh *
Math.max(pixelSize(img.type, c), img.unpackAlignment),
'invalid data for image, buffer size is inconsistent with image format')
} else if (img.element) {
// TODO: check element can be loaded
} else if (img.copy) {
// TODO: check compatible format and type
}
}
}
}
}
module.exports = extend(check, {
optional: checkOptional,
raise: raise,
commandRaise: commandRaise,
command: checkCommand,
parameter: checkParameter,
commandParameter: checkParameterCommand,
constructor: checkConstructor,
type: checkTypeOf,
commandType: checkCommandType,
isTypedArray: checkIsTypedArray,
nni: checkNonNegativeInt,
oneOf: checkOneOf,
shaderError: checkShaderError,
linkError: checkLinkError,
callSite: guessCallSite,
saveCommandRef: saveCommandRef,
saveDrawInfo: saveDrawCommandInfo,
framebufferFormat: checkFramebufferFormat,
guessCommand: guessCommand,
texture2D: checkTexture2D,
textureCube: checkTextureCube
})
},{"./extend":23,"./is-typed-array":26}],21:[function(require,module,exports){
/* globals performance */
module.exports =
(typeof performance !== 'undefined' && performance.now)
? function () { return performance.now() }
: function () { return +(new Date()) }
},{}],22:[function(require,module,exports){
var extend = require('./extend')
function slice (x) {
return Array.prototype.slice.call(x)
}
function join (x) {
return slice(x).join('')
}
module.exports = function createEnvironment () {
// Unique variable id counter
var varCounter = 0
// Linked values are passed from this scope into the generated code block
// Calling link() passes a value into the generated scope and returns
// the variable name which it is bound to
var linkedNames = []
var linkedValues = []
function link (value) {
for (var i = 0; i < linkedValues.length; ++i) {
if (linkedValues[i] === value) {
return linkedNames[i]
}
}
var name = 'g' + (varCounter++)
linkedNames.push(name)
linkedValues.push(value)
return name
}
// create a code block
function block () {
var code = []
function push () {
code.push.apply(code, slice(arguments))
}
var vars = []
function def () {
var name = 'v' + (varCounter++)
vars.push(name)
if (arguments.length > 0) {
code.push(name, '=')
code.push.apply(code, slice(arguments))
code.push(';')
}
return name
}
return extend(push, {
def: def,
toString: function () {
return join([
(vars.length > 0 ? 'var ' + vars + ';' : ''),
join(code)
])
}
})
}
function scope () {
var entry = block()
var exit = block()
var entryToString = entry.toString
var exitToString = exit.toString
function save (object, prop) {
exit(object, prop, '=', entry.def(object, prop), ';')
}
return extend(function () {
entry.apply(entry, slice(arguments))
}, {
def: entry.def,
entry: entry,
exit: exit,
save: save,
set: function (object, prop, value) {
save(object, prop)
entry(object, prop, '=', value, ';')
},
toString: function () {
return entryToString() + exitToString()
}
})
}
function conditional () {
var pred = join(arguments)
var thenBlock = scope()
var elseBlock = scope()
var thenToString = thenBlock.toString
var elseToString = elseBlock.toString
return extend(thenBlock, {
then: function () {
thenBlock.apply(thenBlock, slice(arguments))
return this
},
else: function () {
elseBlock.apply(elseBlock, slice(arguments))
return this
},
toString: function () {
var elseClause = elseToString()
if (elseClause) {
elseClause = 'else{' + elseClause + '}'
}
return join([
'if(', pred, '){',
thenToString(),
'}', elseClause
])
}
})
}
// procedure list
var globalBlock = block()
var procedures = {}
function proc (name, count) {
var args = []
function arg () {
var name = 'a' + args.length
args.push(name)
return name
}
count = count || 0
for (var i = 0; i < count; ++i) {
arg()
}
var body = scope()
var bodyToString = body.toString
var result = procedures[name] = extend(body, {
arg: arg,
toString: function () {
return join([
'function(', args.join(), '){',
bodyToString(),
'}'
])
}
})
return result
}
function compile () {
var code = ['"use strict";',
globalBlock,
'return {']
Object.keys(procedures).forEach(function (name) {
code.push('"', name, '":', procedures[name].toString(), ',')
})
code.push('}')
var src = join(code)
.replace(/;/g, ';\n')
.replace(/}/g, '}\n')
.replace(/{/g, '{\n')
var proc = Function.apply(null, linkedNames.concat(src))
return proc.apply(null, linkedValues)
}
return {
global: globalBlock,
link: link,
block: block,
proc: proc,
scope: scope,
cond: conditional,
compile: compile
}
}
},{"./extend":23}],23:[function(require,module,exports){
module.exports = function (base, opts) {
var keys = Object.keys(opts)
for (var i = 0; i < keys.length; ++i) {
base[keys[i]] = opts[keys[i]]
}
return base
}
},{}],24:[function(require,module,exports){
var isTypedArray = require('./is-typed-array')
module.exports = function isArrayLike (s) {
return Array.isArray(s) || isTypedArray(s)
}
},{"./is-typed-array":26}],25:[function(require,module,exports){
var isTypedArray = require('./is-typed-array')
module.exports = function isNDArrayLike (obj) {
return (
!!obj &&
typeof obj === 'object' &&
Array.isArray(obj.shape) &&
Array.isArray(obj.stride) &&
typeof obj.offset === 'number' &&
obj.shape.length === obj.stride.length &&
(Array.isArray(obj.data) ||
isTypedArray(obj.data)))
}
},{"./is-typed-array":26}],26:[function(require,module,exports){
var dtypes = require('../constants/arraytypes.json')
module.exports = function (x) {
return Object.prototype.toString.call(x) in dtypes
}
},{"../constants/arraytypes.json":3}],27:[function(require,module,exports){
module.exports = function loop (n, f) {
var result = Array(n)
for (var i = 0; i < n; ++i) {
result[i] = f(i)
}
return result
}
},{}],28:[function(require,module,exports){
var loop = require('./loop')
var GL_BYTE = 5120
var GL_UNSIGNED_BYTE = 5121
var GL_SHORT = 5122
var GL_UNSIGNED_SHORT = 5123
var GL_INT = 5124
var GL_UNSIGNED_INT = 5125
var GL_FLOAT = 5126
var bufferPool = loop(8, function () {
return []
})
function nextPow16 (v) {
for (var i = 16; i <= (1 << 28); i *= 16) {
if (v <= i) {
return i
}
}
return 0
}
function log2 (v) {
var r, shift
r = (v > 0xFFFF) << 4
v >>>= r
shift = (v > 0xFF) << 3
v >>>= shift; r |= shift
shift = (v > 0xF) << 2
v >>>= shift; r |= shift
shift = (v > 0x3) << 1
v >>>= shift; r |= shift
return r | (v >> 1)
}
function alloc (n) {
var sz = nextPow16(n)
var bin = bufferPool[log2(sz) >> 2]
if (bin.length > 0) {
return bin.pop()
}
return new ArrayBuffer(sz)
}
function free (buf) {
bufferPool[log2(buf.byteLength) >> 2].push(buf)
}
function allocType (type, n) {
var result = null
switch (type) {
case GL_BYTE:
result = new Int8Array(alloc(n), 0, n)
break
case GL_UNSIGNED_BYTE:
result = new Uint8Array(alloc(n), 0, n)
break
case GL_SHORT:
result = new Int16Array(alloc(2 * n), 0, n)
break
case GL_UNSIGNED_SHORT:
result = new Uint16Array(alloc(2 * n), 0, n)
break
case GL_INT:
result = new Int32Array(alloc(4 * n), 0, n)
break
case GL_UNSIGNED_INT:
result = new Uint32Array(alloc(4 * n), 0, n)
break
case GL_FLOAT:
result = new Float32Array(alloc(4 * n), 0, n)
break
default:
return null
}
if (result.length !== n) {
return result.subarray(0, n)
}
return result
}
function freeType (array) {
free(array.buffer)
}
module.exports = {
alloc: alloc,
free: free,
allocType: allocType,
freeType: freeType
}
},{"./loop":27}],29:[function(require,module,exports){
/* globals requestAnimationFrame, cancelAnimationFrame */
if (typeof requestAnimationFrame === 'function' &&
typeof cancelAnimationFrame === 'function') {
module.exports = {
next: function (x) { return requestAnimationFrame(x) },
cancel: function (x) { return cancelAnimationFrame(x) }
}
} else {
module.exports = {
next: function (cb) {
return setTimeout(cb, 16)
},
cancel: clearTimeout
}
}
},{}],30:[function(require,module,exports){
var pool = require('./pool')
var FLOAT = new Float32Array(1)
var INT = new Uint32Array(FLOAT.buffer)
var GL_UNSIGNED_SHORT = 5123
module.exports = function convertToHalfFloat (array) {
var ushorts = pool.allocType(GL_UNSIGNED_SHORT, array.length)
for (var i = 0; i < array.length; ++i) {
if (isNaN(array[i])) {
ushorts[i] = 0xffff
} else if (array[i] === Infinity) {
ushorts[i] = 0x7c00
} else if (array[i] === -Infinity) {
ushorts[i] = 0xfc00
} else {
FLOAT[0] = array[i]
var x = INT[0]
var sgn = (x >>> 31) << 15
var exp = ((x << 1) >>> 24) - 127
var frac = (x >> 13) & ((1 << 10) - 1)
if (exp < -24) {
// round non-representable denormals to 0
ushorts[i] = sgn
} else if (exp < -14) {
// handle denormals
var s = -14 - exp
ushorts[i] = sgn + ((frac + (1 << 10)) >> s)
} else if (exp > 15) {
// round overflow to +/- Infinity
ushorts[i] = sgn + 0x7c00
} else {
// otherwise convert directly
ushorts[i] = sgn + ((exp + 15) << 10) + frac
}
}
}
return ushorts
}
},{"./pool":28}],31:[function(require,module,exports){
module.exports = function (obj) {
return Object.keys(obj).map(function (key) { return obj[key] })
}
},{}],32:[function(require,module,exports){
// Context and canvas creation helper functions
var check = require('./util/check')
var extend = require('./util/extend')
function createCanvas (element, onDone, pixelRatio) {
var canvas = document.createElement('canvas')
extend(canvas.style, {
border: 0,
margin: 0,
padding: 0,
top: 0,
left: 0
})
element.appendChild(canvas)
if (element === document.body) {
canvas.style.position = 'absolute'
extend(element.style, {
margin: 0,
padding: 0
})
}
function resize () {
var w = window.innerWidth
var h = window.innerHeight
if (element !== document.body) {
var bounds = element.getBoundingClientRect()
w = bounds.right - bounds.left
h = bounds.top - bounds.bottom
}
canvas.width = pixelRatio * w
canvas.height = pixelRatio * h
extend(canvas.style, {
width: w + 'px',
height: h + 'px'
})
}
window.addEventListener('resize', resize, false)
function onDestroy () {
window.removeEventListener('resize', resize)
element.removeChild(canvas)
}
resize()
return {
canvas: canvas,
onDestroy: onDestroy
}
}
function createContext (canvas, contexAttributes) {
function get (name) {
try {
return canvas.getContext(name, contexAttributes)
} catch (e) {
return null
}
}
return (
get('webgl') ||
get('experimental-webgl') ||
get('webgl-experimental')
)
}
function isHTMLElement (obj) {
return (
typeof obj.nodeName === 'string' &&
typeof obj.appendChild === 'function' &&
typeof obj.getBoundingClientRect === 'function'
)
}
function isWebGLContext (obj) {
return (
typeof obj.drawArrays === 'function' ||
typeof obj.drawElements === 'function'
)
}
function parseExtensions (input) {
if (typeof input === 'string') {
return input.split()
}
check(Array.isArray(input), 'invalid extension array')
return input
}
function getElement (desc) {
if (typeof desc === 'string') {
check(typeof document !== 'undefined', 'not supported outside of DOM')
return document.querySelector(desc)
}
return desc
}
module.exports = function parseArgs (args_) {
var args = args_ || {}
var element, container, canvas, gl
var contextAttributes = {}
var extensions = []
var optionalExtensions = []
var pixelRatio = (typeof window === 'undefined' ? 1 : window.devicePixelRatio)
var profile = false
var onDone = function (err) {
if (err) {
check.raise(err)
}
}
var onDestroy = function () {}
if (typeof args === 'string') {
check(
typeof document !== 'undefined',
'selector queries only supported in DOM enviroments')
element = document.querySelector(args)
check(element, 'invalid query string for element')
} else if (typeof args === 'object') {
if (isHTMLElement(args)) {
element = args
} else if (isWebGLContext(args)) {
gl = args
canvas = gl.canvas
} else {
check.constructor(args)
if ('gl' in args) {
gl = args.gl
} else if ('canvas' in args) {
canvas = getElement(args.canvas)
} else if ('container' in args) {
container = getElement(args.container)
}
if ('attributes' in args) {
contextAttributes = args.attributes
check.type(contextAttributes, 'object', 'invalid context attributes')
}
if ('extensions' in args) {
extensions = parseExtensions(args.extensions)
}
if ('optionalExtensions' in args) {
optionalExtensions = parseExtensions(args.optionalExtensions)
}
if ('onDone' in args) {
check.type(
args.onDone, 'function',
'invalid or missing onDone callback')
onDone = args.onDone
}
if ('profile' in args) {
profile = !!args.profile
}
if ('pixelRatio' in args) {
pixelRatio = +args.pixelRatio
check(pixelRatio > 0, 'invalid pixel ratio')
}
}
} else {
check.raise('invalid arguments to regl')
}
if (element) {
if (element.nodeName.toLowerCase() === 'canvas') {
canvas = element
} else {
container = element
}
}
if (!gl) {
if (!canvas) {
check(
typeof document !== 'undefined',
'must manually specify webgl context outside of DOM environments')
var result = createCanvas(container || document.body, onDone, pixelRatio)
if (!result) {
return null
}
canvas = result.canvas
onDestroy = result.onDestroy
}
gl = createContext(canvas, contextAttributes)
}
if (!gl) {
onDestroy()
onDone('webgl not supported, try upgrading your browser or graphics drivers http://get.webgl.org')
return null
}
return {
gl: gl,
canvas: canvas,
container: container,
extensions: extensions,
optionalExtensions: optionalExtensions,
pixelRatio: pixelRatio,
profile: profile,
onDone: onDone,
onDestroy: onDestroy
}
}
},{"./util/check":20,"./util/extend":23}],"regl":[function(require,module,exports){
var check = require('./lib/util/check')
var extend = require('./lib/util/extend')
var dynamic = require('./lib/dynamic')
var raf = require('./lib/util/raf')
var clock = require('./lib/util/clock')
var createStringStore = require('./lib/strings')
var initWebGL = require('./lib/webgl')
var wrapExtensions = require('./lib/extension')
var wrapLimits = require('./lib/limits')
var wrapBuffers = require('./lib/buffer')
var wrapElements = require('./lib/elements')
var wrapTextures = require('./lib/texture')
var wrapRenderbuffers = require('./lib/renderbuffer')
var wrapFramebuffers = require('./lib/framebuffer')
var wrapAttributes = require('./lib/attribute')
var wrapShaders = require('./lib/shader')
var wrapRead = require('./lib/read')
var createCore = require('./lib/core')
var createStats = require('./lib/stats')
var createTimer = require('./lib/timer')
var GL_COLOR_BUFFER_BIT = 16384
var GL_DEPTH_BUFFER_BIT = 256
var GL_STENCIL_BUFFER_BIT = 1024
var GL_ARRAY_BUFFER = 34962
var CONTEXT_LOST_EVENT = 'webglcontextlost'
var CONTEXT_RESTORED_EVENT = 'webglcontextrestored'
var DYN_PROP = 1
var DYN_CONTEXT = 2
var DYN_STATE = 3
function find (haystack, needle) {
for (var i = 0; i < haystack.length; ++i) {
if (haystack[i] === needle) {
return i
}
}
return -1
}
module.exports = function wrapREGL (args) {
var config = initWebGL(args)
if (!config) {
return null
}
var gl = config.gl
var glAttributes = gl.getContextAttributes()
var contextLost = gl.isContextLost()
var extensionState = wrapExtensions(gl, config)
if (!extensionState) {
return null
}
var stringStore = createStringStore()
var stats = createStats()
var extensions = extensionState.extensions
var timer = createTimer(gl, extensions)
var START_TIME = clock()
var WIDTH = gl.drawingBufferWidth
var HEIGHT = gl.drawingBufferHeight
var contextState = {
tick: 0,
time: 0,
viewportWidth: WIDTH,
viewportHeight: HEIGHT,
framebufferWidth: WIDTH,
framebufferHeight: HEIGHT,
drawingBufferWidth: WIDTH,
drawingBufferHeight: HEIGHT,
pixelRatio: config.pixelRatio
}
var uniformState = {}
var drawState = {
elements: null,
primitive: 4, // GL_TRIANGLES
count: -1,
offset: 0,
instances: -1
}
var limits = wrapLimits(gl, extensions)
var bufferState = wrapBuffers(gl, stats, config)
var elementState = wrapElements(gl, extensions, bufferState, stats)
var attributeState = wrapAttributes(
gl,
extensions,
limits,
bufferState,
stringStore)
var shaderState = wrapShaders(gl, stringStore, stats, config)
var textureState = wrapTextures(
gl,
extensions,
limits,
function () { core.procs.poll() },
contextState,
stats,
config)
var renderbufferState = wrapRenderbuffers(gl, extensions, limits, stats, config)
var framebufferState = wrapFramebuffers(
gl,
extensions,
limits,
textureState,
renderbufferState,
stats)
var core = createCore(
gl,
stringStore,
extensions,
limits,
bufferState,
elementState,
textureState,
framebufferState,
uniformState,
attributeState,
shaderState,
drawState,
contextState,
timer,
config)
var readPixels = wrapRead(
gl,
framebufferState,
core.procs.poll,
contextState,
glAttributes, extensions)
var nextState = core.next
var canvas = gl.canvas
var rafCallbacks = []
var lossCallbacks = []
var restoreCallbacks = []
var destroyCallbacks = [config.onDestroy]
var activeRAF = null
function handleRAF () {
if (rafCallbacks.length === 0) {
if (timer) {
timer.update()
}
activeRAF = null
return
}
// schedule next animation frame
activeRAF = raf.next(handleRAF)
// poll for changes
poll()
// fire a callback for all pending rafs
for (var i = rafCallbacks.length - 1; i >= 0; --i) {
var cb = rafCallbacks[i]
if (cb) {
cb(contextState, null, 0)
}
}
// flush all pending webgl calls
gl.flush()
// poll GPU timers *after* gl.flush so we don't delay command dispatch
if (timer) {
timer.update()
}
}
function startRAF () {
if (!activeRAF && rafCallbacks.length > 0) {
activeRAF = raf.next(handleRAF)
}
}
function stopRAF () {
if (activeRAF) {
raf.cancel(handleRAF)
activeRAF = null
}
}
function handleContextLoss (event) {
event.preventDefault()
// set context lost flag
contextLost = true
// pause request animation frame
stopRAF()
// lose context
lossCallbacks.forEach(function (cb) {
cb()
})
}
function handleContextRestored (event) {
// clear error code
gl.getError()
// clear context lost flag
contextLost = false
// refresh state
extensionState.restore()
shaderState.restore()
bufferState.restore()
textureState.restore()
renderbufferState.restore()
framebufferState.restore()
if (timer) {
timer.restore()
}
// refresh state
core.procs.refresh()
// restart RAF
startRAF()
// restore context
restoreCallbacks.forEach(function (cb) {
cb()
})
}
if (canvas) {
canvas.addEventListener(CONTEXT_LOST_EVENT, handleContextLoss, false)
canvas.addEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored, false)
}
function destroy () {
rafCallbacks.length = 0
stopRAF()
if (canvas) {
canvas.removeEventListener(CONTEXT_LOST_EVENT, handleContextLoss)
canvas.removeEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored)
}
shaderState.clear()
framebufferState.clear()
renderbufferState.clear()
textureState.clear()
elementState.clear()
bufferState.clear()
if (timer) {
timer.clear()
}
destroyCallbacks.forEach(function (cb) {
cb()
})
}
function compileProcedure (options) {
check(!!options, 'invalid args to regl({...})')
check.type(options, 'object', 'invalid args to regl({...})')
function flattenNestedOptions (options) {
var result = extend({}, options)
delete result.uniforms
delete result.attributes
delete result.context
if ('stencil' in result && result.stencil.op) {
result.stencil.opBack = result.stencil.opFront = result.stencil.op
delete result.stencil.op
}
function merge (name) {
if (name in result) {
var child = result[name]
delete result[name]
Object.keys(child).forEach(function (prop) {
result[name + '.' + prop] = child[prop]
})
}
}
merge('blend')
merge('depth')
merge('cull')
merge('stencil')
merge('polygonOffset')
merge('scissor')
merge('sample')
return result
}
function separateDynamic (object) {
var staticItems = {}
var dynamicItems = {}
Object.keys(object).forEach(function (option) {
var value = object[option]
if (dynamic.isDynamic(value)) {
dynamicItems[option] = dynamic.unbox(value, option)
} else {
staticItems[option] = value
}
})
return {
dynamic: dynamicItems,
static: staticItems
}
}
// Treat context variables separate from other dynamic variables
var context = separateDynamic(options.context || {})
var uniforms = separateDynamic(options.uniforms || {})
var attributes = separateDynamic(options.attributes || {})
var opts = separateDynamic(flattenNestedOptions(options))
var stats = {
gpuTime: 0.0,
cpuTime: 0.0,
count: 0
}
var compiled = core.compile(opts, attributes, uniforms, context, stats)
var draw = compiled.draw
var batch = compiled.batch
var scope = compiled.scope
// FIXME: we should modify code generation for batch commands so this
// isn't necessary
var EMPTY_ARRAY = []
function reserve (count) {
while (EMPTY_ARRAY.length < count) {
EMPTY_ARRAY.push(null)
}
return EMPTY_ARRAY
}
function REGLCommand (args, body) {
var i
if (contextLost) {
check.raise('context lost')
}
if (typeof args === 'function') {
return scope.call(this, null, args, 0)
} else if (typeof body === 'function') {
if (typeof args === 'number') {
for (i = 0; i < args; ++i) {
scope.call(this, null, body, i)
}
return
} else if (Array.isArray(args)) {
for (i = 0; i < args.length; ++i) {
scope.call(this, args[i], body, i)
}
return
} else {
return scope.call(this, args, body, 0)
}
} else if (typeof args === 'number') {
if (args > 0) {
return batch.call(this, reserve(args | 0), args | 0)
}
} else if (Array.isArray(args)) {
if (args.length) {
return batch.call(this, args, args.length)
}
} else {
return draw.call(this, args)
}
}
return extend(REGLCommand, {
stats: stats
})
}
function clear (options) {
check(
typeof options === 'object' && options,
'regl.clear() takes an object as input')
var clearFlags = 0
core.procs.poll()
var c = options.color
if (c) {
gl.clearColor(+c[0] || 0, +c[1] || 0, +c[2] || 0, +c[3] || 0)
clearFlags |= GL_COLOR_BUFFER_BIT
}
if ('depth' in options) {
gl.clearDepth(+options.depth)
clearFlags |= GL_DEPTH_BUFFER_BIT
}
if ('stencil' in options) {
gl.clearStencil(options.stencil | 0)
clearFlags |= GL_STENCIL_BUFFER_BIT
}
check(!!clearFlags, 'called regl.clear with no buffer specified')
gl.clear(clearFlags)
}
function frame (cb) {
check.type(cb, 'function', 'regl.frame() callback must be a function')
rafCallbacks.push(cb)
function cancel () {
// FIXME: should we check something other than equals cb here?
// what if a user calls frame twice with the same callback...
//
var i = find(rafCallbacks, cb)
check(i >= 0, 'cannot cancel a frame twice')
function pendingCancel () {
var index = find(rafCallbacks, pendingCancel)
rafCallbacks[index] = rafCallbacks[rafCallbacks.length - 1]
rafCallbacks.length -= 1
if (rafCallbacks.length <= 0) {
stopRAF()
}
}
rafCallbacks[i] = pendingCancel
}
startRAF()
return {
cancel: cancel
}
}
// poll viewport
function pollViewport () {
var viewport = nextState.viewport
var scissorBox = nextState.scissor_box
viewport[0] = viewport[1] = scissorBox[0] = scissorBox[1] = 0
contextState.viewportWidth =
contextState.framebufferWidth =
contextState.drawingBufferWidth =
viewport[2] =
scissorBox[2] = gl.drawingBufferWidth
contextState.viewportHeight =
contextState.framebufferHeight =
contextState.drawingBufferHeight =
viewport[3] =
scissorBox[3] = gl.drawingBufferHeight
}
function poll () {
contextState.tick += 1
contextState.time = now()
pollViewport()
core.procs.poll()
}
function refresh () {
pollViewport()
core.procs.refresh()
if (timer) {
timer.update()
}
}
function now () {
return (clock() - START_TIME) / 1000.0
}
refresh()
function addListener (event, callback) {
check.type(callback, 'function', 'listener callback must be a function')
var callbacks
switch (event) {
case 'frame':
return frame(callback)
case 'lost':
callbacks = lossCallbacks
break
case 'restore':
callbacks = restoreCallbacks
break
case 'destroy':
callbacks = destroyCallbacks
break
default:
check.raise('invalid event, must be one of frame,lost,restore,destroy')
}
callbacks.push(callback)
return {
cancel: function () {
for (var i = 0; i < callbacks.length; ++i) {
if (callbacks[i] === callback) {
callbacks[i] = callbacks[callbacks.length - 1]
callbacks.pop()
return
}
}
}
}
}
var regl = extend(compileProcedure, {
// Clear current FBO
clear: clear,
// Short cuts for dynamic variables
prop: dynamic.define.bind(null, DYN_PROP),
context: dynamic.define.bind(null, DYN_CONTEXT),
this: dynamic.define.bind(null, DYN_STATE),
// executes an empty draw command
draw: compileProcedure({}),
// Resources
buffer: function (options) {
return bufferState.create(options, GL_ARRAY_BUFFER, false, false)
},
elements: function (options) {
return elementState.create(options, false)
},
texture: textureState.create2D,
cube: textureState.createCube,
renderbuffer: renderbufferState.create,
framebuffer: framebufferState.create,
framebufferCube: framebufferState.createCube,
// Expose context attributes
attributes: glAttributes,
// Frame rendering
frame: frame,
on: addListener,
// System limits
limits: limits,
hasExtension: function (name) {
return limits.extensions.indexOf(name.toLowerCase()) >= 0
},
// Read pixels
read: readPixels,
// Destroy regl and all associated resources
destroy: destroy,
// Direct GL state manipulation
_gl: gl,
_refresh: refresh,
poll: function () {
poll()
if (timer) {
timer.update()
}
},
// Current time
now: now,
// regl Statistics Information
stats: stats
})
config.onDone(null, regl)
return regl
}
},{"./lib/attribute":1,"./lib/buffer":2,"./lib/core":7,"./lib/dynamic":8,"./lib/elements":9,"./lib/extension":10,"./lib/framebuffer":11,"./lib/limits":12,"./lib/read":13,"./lib/renderbuffer":14,"./lib/shader":15,"./lib/stats":16,"./lib/strings":17,"./lib/texture":18,"./lib/timer":19,"./lib/util/check":20,"./lib/util/clock":21,"./lib/util/extend":23,"./lib/util/raf":29,"./lib/webgl":32}]},{},[])
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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","var GL_FLOAT = 5126\n\nfunction AttributeRecord () {\n  this.state = 0\n\n  this.x = 0.0\n  this.y = 0.0\n  this.z = 0.0\n  this.w = 0.0\n\n  this.buffer = null\n  this.size = 0\n  this.normalized = false\n  this.type = GL_FLOAT\n  this.offset = 0\n  this.stride = 0\n  this.divisor = 0\n}\n\nmodule.exports = function wrapAttributeState (\n  gl,\n  extensions,\n  limits,\n  bufferState,\n  stringStore) {\n  var NUM_ATTRIBUTES = limits.maxAttributes\n  var attributeBindings = new Array(NUM_ATTRIBUTES)\n  for (var i = 0; i < NUM_ATTRIBUTES; ++i) {\n    attributeBindings[i] = new AttributeRecord()\n  }\n\n  return {\n    Record: AttributeRecord,\n    scope: {},\n    state: attributeBindings\n  }\n}\n","var check = require('./util/check')\nvar isTypedArray = require('./util/is-typed-array')\nvar isNDArrayLike = require('./util/is-ndarray')\nvar values = require('./util/values')\nvar pool = require('./util/pool')\n\nvar arrayTypes = require('./constants/arraytypes.json')\nvar bufferTypes = require('./constants/dtypes.json')\nvar usageTypes = require('./constants/usage.json')\n\nvar GL_STATIC_DRAW = 0x88E4\nvar GL_STREAM_DRAW = 0x88E0\n\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_FLOAT = 5126\n\nvar DTYPES_SIZES = []\nDTYPES_SIZES[5120] = 1 // int8\nDTYPES_SIZES[5122] = 2 // int16\nDTYPES_SIZES[5124] = 4 // int32\nDTYPES_SIZES[5121] = 1 // uint8\nDTYPES_SIZES[5123] = 2 // uint16\nDTYPES_SIZES[5125] = 4 // uint32\nDTYPES_SIZES[5126] = 4 // float32\n\nfunction typedArrayCode (data) {\n  return arrayTypes[Object.prototype.toString.call(data)] | 0\n}\n\nfunction copyArray (out, inp) {\n  for (var i = 0; i < inp.length; ++i) {\n    out[i] = inp[i]\n  }\n}\n\nfunction transpose (\n  result, data, shapeX, shapeY, strideX, strideY, offset) {\n  var ptr = 0\n  for (var i = 0; i < shapeX; ++i) {\n    for (var j = 0; j < shapeY; ++j) {\n      result[ptr++] = data[strideX * i + strideY * j + offset]\n    }\n  }\n}\n\nfunction flatten (result, data, dimension) {\n  var ptr = 0\n  for (var i = 0; i < data.length; ++i) {\n    var v = data[i]\n    for (var j = 0; j < dimension; ++j) {\n      result[ptr++] = v[j]\n    }\n  }\n}\n\nmodule.exports = function wrapBufferState (gl, stats, config) {\n  var bufferCount = 0\n  var bufferSet = {}\n\n  function REGLBuffer (type) {\n    this.id = bufferCount++\n    this.buffer = gl.createBuffer()\n    this.type = type\n    this.usage = GL_STATIC_DRAW\n    this.byteLength = 0\n    this.dimension = 1\n    this.dtype = GL_UNSIGNED_BYTE\n\n    this.persistentData = null\n\n    if (config.profile) {\n      this.stats = {size: 0}\n    }\n  }\n\n  REGLBuffer.prototype.bind = function () {\n    gl.bindBuffer(this.type, this.buffer)\n  }\n\n  REGLBuffer.prototype.destroy = function () {\n    destroy(this)\n  }\n\n  var streamPool = []\n\n  function createStream (type, data) {\n    var buffer = streamPool.pop()\n    if (!buffer) {\n      buffer = new REGLBuffer(type)\n    }\n    buffer.bind()\n    initBufferFromData(buffer, data, GL_STREAM_DRAW, 0, 1, false)\n    return buffer\n  }\n\n  function destroyStream (stream) {\n    streamPool.push(stream)\n  }\n\n  function initBufferFromTypedArray (buffer, data, usage) {\n    buffer.byteLength = data.byteLength\n    gl.bufferData(buffer.type, data, usage)\n  }\n\n  function initBufferFromData (buffer, data, usage, dtype, dimension, persist) {\n    buffer.usage = usage\n    if (Array.isArray(data)) {\n      buffer.dtype = dtype || GL_FLOAT\n      if (data.length > 0) {\n        var flatData\n        if (Array.isArray(data[0])) {\n          buffer.dimension = data[0].length\n          flatData = pool.allocType(\n            buffer.dtype,\n            data.length * buffer.dimension)\n          flatten(flatData, data, buffer.dimension)\n          initBufferFromTypedArray(buffer, flatData, usage)\n          if (persist) {\n            buffer.persistentData = flatData\n          } else {\n            pool.freeType(flatData)\n          }\n        } else if (typeof data[0] === 'number') {\n          buffer.dimension = dimension\n          var typedData = pool.allocType(buffer.dtype, data.length)\n          copyArray(typedData, data)\n          initBufferFromTypedArray(buffer, typedData, usage)\n          if (persist) {\n            buffer.persistentData = typedData\n          } else {\n            pool.freeType(typedData)\n          }\n        } else if (isTypedArray(data[0])) {\n          buffer.dimension = data[0].length\n          buffer.dtype = dtype || typedArrayCode(data[0]) || GL_FLOAT\n          flatData = pool.allocType(\n            buffer.dtype,\n            data.length * buffer.dimension)\n          flatten(flatData, data, buffer.dimension)\n          initBufferFromTypedArray(buffer, flatData, usage)\n          if (persist) {\n            buffer.persistentData = flatData\n          } else {\n            pool.freeType(flatData)\n          }\n        } else {\n          check.raise('invalid buffer data')\n        }\n      }\n    } else if (isTypedArray(data)) {\n      buffer.dtype = dtype || typedArrayCode(data)\n      buffer.dimension = dimension\n      initBufferFromTypedArray(buffer, data, usage)\n      if (persist) {\n        buffer.persistentData = new Uint8Array(new Uint8Array(data.buffer))\n      }\n    } else if (isNDArrayLike(data)) {\n      var shape = data.shape\n      var stride = data.stride\n      var offset = data.offset\n\n      var shapeX = 0\n      var shapeY = 0\n      var strideX = 0\n      var strideY = 0\n      if (shape.length === 1) {\n        shapeX = shape[0]\n        shapeY = 1\n        strideX = stride[0]\n        strideY = 0\n      } else if (shape.length === 2) {\n        shapeX = shape[0]\n        shapeY = shape[1]\n        strideX = stride[0]\n        strideY = stride[1]\n      } else {\n        check.raise('invalid shape')\n      }\n\n      buffer.dtype = dtype || typedArrayCode(data.data) || GL_FLOAT\n      buffer.dimension = shapeY\n\n      var transposeData = pool.allocType(buffer.dtype, shapeX * shapeY)\n      transpose(transposeData,\n        data.data,\n        shapeX, shapeY,\n        strideX, strideY,\n        offset)\n      initBufferFromTypedArray(buffer, transposeData, usage)\n      if (persist) {\n        buffer.persistentData = transposeData\n      } else {\n        pool.freeType(transposeData)\n      }\n    } else {\n      check.raise('invalid buffer data')\n    }\n  }\n\n  function destroy (buffer) {\n    stats.bufferCount--\n\n    var handle = buffer.buffer\n    check(handle, 'buffer must not be deleted already')\n    gl.deleteBuffer(handle)\n    buffer.buffer = null\n    delete bufferSet[buffer.id]\n  }\n\n  function createBuffer (options, type, deferInit, persistent) {\n    stats.bufferCount++\n\n    var buffer = new REGLBuffer(type)\n    bufferSet[buffer.id] = buffer\n\n    function reglBuffer (options) {\n      var usage = GL_STATIC_DRAW\n      var data = null\n      var byteLength = 0\n      var dtype = 0\n      var dimension = 1\n      if (Array.isArray(options) ||\n          isTypedArray(options) ||\n          isNDArrayLike(options)) {\n        data = options\n      } else if (typeof options === 'number') {\n        byteLength = options | 0\n      } else if (options) {\n        check.type(\n          options, 'object',\n          'buffer arguments must be an object, a number or an array')\n\n        if ('data' in options) {\n          check(\n            data === null ||\n            Array.isArray(data) ||\n            isTypedArray(data) ||\n            isNDArrayLike(data),\n            'invalid data for buffer')\n          data = options.data\n        }\n\n        if ('usage' in options) {\n          check.parameter(options.usage, usageTypes, 'invalid buffer usage')\n          usage = usageTypes[options.usage]\n        }\n\n        if ('type' in options) {\n          check.parameter(options.type, bufferTypes, 'invalid buffer type')\n          dtype = bufferTypes[options.type]\n        }\n\n        if ('dimension' in options) {\n          check.type(options.dimension, 'number', 'invalid dimension')\n          dimension = options.dimension | 0\n        }\n\n        if ('length' in options) {\n          check.nni(byteLength, 'buffer length must be a nonnegative integer')\n          byteLength = options.length | 0\n        }\n      }\n\n      buffer.bind()\n      if (!data) {\n        gl.bufferData(buffer.type, byteLength, usage)\n        buffer.dtype = dtype || GL_UNSIGNED_BYTE\n        buffer.usage = usage\n        buffer.dimension = dimension\n        buffer.byteLength = byteLength\n      } else {\n        initBufferFromData(buffer, data, usage, dtype, dimension, persistent)\n      }\n\n      if (config.profile) {\n        buffer.stats.size = buffer.byteLength * DTYPES_SIZES[buffer.dtype]\n      }\n\n      return reglBuffer\n    }\n\n    function setSubData (data, offset) {\n      check(offset + data.byteLength <= buffer.byteLength,\n        'invalid buffer subdata call, buffer is too small. ' + ' Can\\'t write data of size ' + data.byteLength + ' starting from offset ' + offset + ' to a buffer of size ' + buffer.byteLength)\n\n      gl.bufferSubData(buffer.type, offset, data)\n    }\n\n    function subdata (data, offset_) {\n      var offset = (offset_ || 0) | 0\n      buffer.bind()\n      if (Array.isArray(data)) {\n        if (data.length > 0) {\n          if (typeof data[0] === 'number') {\n            var converted = pool.allocType(buffer.dtype, data.length)\n            copyArray(converted, data)\n            setSubData(converted, offset)\n            pool.freeType(converted)\n          } else if (Array.isArray(data[0]) || isTypedArray(data[0])) {\n            var dimension = data[0].length\n            var flatData = pool.allocType(buffer.dtype, data.length * dimension)\n            flatten(flatData, data, dimension)\n            setSubData(flatData, offset)\n            pool.freeType(flatData)\n          } else {\n            check.raise('invalid buffer data')\n          }\n        }\n      } else if (isTypedArray(data)) {\n        setSubData(data, offset)\n      } else if (isNDArrayLike(data)) {\n        var shape = data.shape\n        var stride = data.stride\n\n        var shapeX = 0\n        var shapeY = 0\n        var strideX = 0\n        var strideY = 0\n        if (shape.length === 1) {\n          shapeX = shape[0]\n          shapeY = 1\n          strideX = stride[0]\n          strideY = 0\n        } else if (shape.length === 2) {\n          shapeX = shape[0]\n          shapeY = shape[1]\n          strideX = stride[0]\n          strideY = stride[1]\n        } else {\n          check.raise('invalid shape')\n        }\n        var dtype = Array.isArray(data.data)\n          ? buffer.dtype\n          : typedArrayCode(data.data)\n\n        var transposeData = pool.allocType(dtype, shapeX * shapeY)\n        transpose(transposeData,\n          data.data,\n          shapeX, shapeY,\n          strideX, strideY,\n          data.offset)\n        setSubData(transposeData, offset)\n        pool.freeType(transposeData)\n      } else {\n        check.raise('invalid data for buffer subdata')\n      }\n      return reglBuffer\n    }\n\n    if (!deferInit) {\n      reglBuffer(options)\n    }\n\n    reglBuffer._reglType = 'buffer'\n    reglBuffer._buffer = buffer\n    reglBuffer.subdata = subdata\n    if (config.profile) {\n      reglBuffer.stats = buffer.stats\n    }\n    reglBuffer.destroy = function () { destroy(buffer) }\n\n    return reglBuffer\n  }\n\n  function restoreBuffers () {\n    values(bufferSet).forEach(function (buffer) {\n      buffer.buffer = gl.createBuffer()\n      gl.bindBuffer(buffer.type, buffer.buffer)\n      gl.bufferData(\n        buffer.type, buffer.persistentData || buffer.byteLength, buffer.usage)\n    })\n  }\n\n  if (config.profile) {\n    stats.getTotalBufferSize = function () {\n      var total = 0\n      // TODO: Right now, the streams are not part of the total count.\n      Object.keys(bufferSet).forEach(function (key) {\n        total += bufferSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  return {\n    create: createBuffer,\n\n    createStream: createStream,\n    destroyStream: destroyStream,\n\n    clear: function () {\n      values(bufferSet).forEach(destroy)\n      streamPool.forEach(destroy)\n    },\n\n    getBuffer: function (wrapper) {\n      if (wrapper && wrapper._buffer instanceof REGLBuffer) {\n        return wrapper._buffer\n      }\n      return null\n    },\n\n    restore: restoreBuffers,\n\n    _initBuffer: initBufferFromData\n  }\n}\n","module.exports={\n  \"[object Int8Array]\": 5120\n, \"[object Int16Array]\": 5122\n, \"[object Int32Array]\": 5124\n, \"[object Uint8Array]\": 5121\n, \"[object Uint8ClampedArray]\": 5121\n, \"[object Uint16Array]\": 5123\n, \"[object Uint32Array]\": 5125\n, \"[object Float32Array]\": 5126\n, \"[object Float64Array]\": 5121\n, \"[object ArrayBuffer]\": 5121\n}\n","module.exports={\n  \"int8\": 5120\n, \"int16\": 5122\n, \"int32\": 5124\n, \"uint8\": 5121\n, \"uint16\": 5123\n, \"uint32\": 5125\n, \"float\": 5126\n, \"float32\": 5126\n}\n","module.exports={\n  \"points\": 0,\n  \"point\": 0,\n  \"lines\": 1,\n  \"line\": 1,\n  \"line loop\": 2,\n  \"line strip\": 3,\n  \"triangles\": 4,\n  \"triangle\": 4,\n  \"triangle strip\": 5,\n  \"triangle fan\": 6\n}\n","module.exports={\n  \"static\": 35044,\n  \"dynamic\": 35048,\n  \"stream\": 35040\n}\n","var check = require('./util/check')\nvar createEnvironment = require('./util/codegen')\nvar loop = require('./util/loop')\nvar isTypedArray = require('./util/is-typed-array')\nvar isNDArray = require('./util/is-ndarray')\nvar isArrayLike = require('./util/is-array-like')\nvar dynamic = require('./dynamic')\n\nvar primTypes = require('./constants/primitives.json')\nvar glTypes = require('./constants/dtypes.json')\n\n// \"cute\" names for vector components\nvar CUTE_COMPONENTS = 'xyzw'.split('')\n\nvar GL_UNSIGNED_BYTE = 5121\n\nvar ATTRIB_STATE_POINTER = 1\nvar ATTRIB_STATE_CONSTANT = 2\n\nvar DYN_FUNC = 0\nvar DYN_PROP = 1\nvar DYN_CONTEXT = 2\nvar DYN_STATE = 3\nvar DYN_THUNK = 4\n\nvar S_DITHER = 'dither'\nvar S_BLEND_ENABLE = 'blend.enable'\nvar S_BLEND_COLOR = 'blend.color'\nvar S_BLEND_EQUATION = 'blend.equation'\nvar S_BLEND_FUNC = 'blend.func'\nvar S_DEPTH_ENABLE = 'depth.enable'\nvar S_DEPTH_FUNC = 'depth.func'\nvar S_DEPTH_RANGE = 'depth.range'\nvar S_DEPTH_MASK = 'depth.mask'\nvar S_COLOR_MASK = 'colorMask'\nvar S_CULL_ENABLE = 'cull.enable'\nvar S_CULL_FACE = 'cull.face'\nvar S_FRONT_FACE = 'frontFace'\nvar S_LINE_WIDTH = 'lineWidth'\nvar S_POLYGON_OFFSET_ENABLE = 'polygonOffset.enable'\nvar S_POLYGON_OFFSET_OFFSET = 'polygonOffset.offset'\nvar S_SAMPLE_ALPHA = 'sample.alpha'\nvar S_SAMPLE_ENABLE = 'sample.enable'\nvar S_SAMPLE_COVERAGE = 'sample.coverage'\nvar S_STENCIL_ENABLE = 'stencil.enable'\nvar S_STENCIL_MASK = 'stencil.mask'\nvar S_STENCIL_FUNC = 'stencil.func'\nvar S_STENCIL_OPFRONT = 'stencil.opFront'\nvar S_STENCIL_OPBACK = 'stencil.opBack'\nvar S_SCISSOR_ENABLE = 'scissor.enable'\nvar S_SCISSOR_BOX = 'scissor.box'\nvar S_VIEWPORT = 'viewport'\n\nvar S_PROFILE = 'profile'\n\nvar S_FRAMEBUFFER = 'framebuffer'\nvar S_VERT = 'vert'\nvar S_FRAG = 'frag'\nvar S_ELEMENTS = 'elements'\nvar S_PRIMITIVE = 'primitive'\nvar S_COUNT = 'count'\nvar S_OFFSET = 'offset'\nvar S_INSTANCES = 'instances'\n\nvar SUFFIX_WIDTH = 'Width'\nvar SUFFIX_HEIGHT = 'Height'\n\nvar S_FRAMEBUFFER_WIDTH = S_FRAMEBUFFER + SUFFIX_WIDTH\nvar S_FRAMEBUFFER_HEIGHT = S_FRAMEBUFFER + SUFFIX_HEIGHT\nvar S_VIEWPORT_WIDTH = S_VIEWPORT + SUFFIX_WIDTH\nvar S_VIEWPORT_HEIGHT = S_VIEWPORT + SUFFIX_HEIGHT\nvar S_DRAWINGBUFFER = 'drawingBuffer'\nvar S_DRAWINGBUFFER_WIDTH = S_DRAWINGBUFFER + SUFFIX_WIDTH\nvar S_DRAWINGBUFFER_HEIGHT = S_DRAWINGBUFFER + SUFFIX_HEIGHT\n\nvar NESTED_OPTIONS = [\n  S_BLEND_FUNC,\n  S_BLEND_EQUATION,\n  S_STENCIL_FUNC,\n  S_STENCIL_OPFRONT,\n  S_STENCIL_OPBACK,\n  S_SAMPLE_COVERAGE,\n  S_VIEWPORT,\n  S_SCISSOR_BOX,\n  S_POLYGON_OFFSET_OFFSET\n]\n\nvar GL_ARRAY_BUFFER = 34962\nvar GL_ELEMENT_ARRAY_BUFFER = 34963\n\nvar GL_FRAGMENT_SHADER = 35632\nvar GL_VERTEX_SHADER = 35633\n\nvar GL_TEXTURE_2D = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP = 0x8513\n\nvar GL_CULL_FACE = 0x0B44\nvar GL_BLEND = 0x0BE2\nvar GL_DITHER = 0x0BD0\nvar GL_STENCIL_TEST = 0x0B90\nvar GL_DEPTH_TEST = 0x0B71\nvar GL_SCISSOR_TEST = 0x0C11\nvar GL_POLYGON_OFFSET_FILL = 0x8037\nvar GL_SAMPLE_ALPHA_TO_COVERAGE = 0x809E\nvar GL_SAMPLE_COVERAGE = 0x80A0\n\nvar GL_FLOAT = 5126\nvar GL_FLOAT_VEC2 = 35664\nvar GL_FLOAT_VEC3 = 35665\nvar GL_FLOAT_VEC4 = 35666\nvar GL_INT = 5124\nvar GL_INT_VEC2 = 35667\nvar GL_INT_VEC3 = 35668\nvar GL_INT_VEC4 = 35669\nvar GL_BOOL = 35670\nvar GL_BOOL_VEC2 = 35671\nvar GL_BOOL_VEC3 = 35672\nvar GL_BOOL_VEC4 = 35673\nvar GL_FLOAT_MAT2 = 35674\nvar GL_FLOAT_MAT3 = 35675\nvar GL_FLOAT_MAT4 = 35676\nvar GL_SAMPLER_2D = 35678\nvar GL_SAMPLER_CUBE = 35680\n\nvar GL_TRIANGLES = 4\n\nvar GL_FRONT = 1028\nvar GL_BACK = 1029\nvar GL_CW = 0x0900\nvar GL_CCW = 0x0901\nvar GL_MIN_EXT = 0x8007\nvar GL_MAX_EXT = 0x8008\nvar GL_ALWAYS = 519\nvar GL_KEEP = 7680\nvar GL_ZERO = 0\nvar GL_ONE = 1\nvar GL_FUNC_ADD = 0x8006\nvar GL_LESS = 513\n\nvar GL_FRAMEBUFFER = 0x8D40\nvar GL_COLOR_ATTACHMENT0 = 0x8CE0\n\nvar blendFuncs = {\n  '0': 0,\n  '1': 1,\n  'zero': 0,\n  'one': 1,\n  'src color': 768,\n  'one minus src color': 769,\n  'src alpha': 770,\n  'one minus src alpha': 771,\n  'dst color': 774,\n  'one minus dst color': 775,\n  'dst alpha': 772,\n  'one minus dst alpha': 773,\n  'constant color': 32769,\n  'one minus constant color': 32770,\n  'constant alpha': 32771,\n  'one minus constant alpha': 32772,\n  'src alpha saturate': 776\n}\n\n// There are invalid values for srcRGB and dstRGB. See:\n// https://www.khronos.org/registry/webgl/specs/1.0/#6.13\n// https://github.com/KhronosGroup/WebGL/blob/0d3201f5f7ec3c0060bc1f04077461541f1987b9/conformance-suites/1.0.3/conformance/misc/webgl-specific.html#L56\nvar invalidBlendCombinations = [\n  'constant color, constant alpha',\n  'one minus constant color, constant alpha',\n  'constant color, one minus constant alpha',\n  'one minus constant color, one minus constant alpha',\n  'constant alpha, constant color',\n  'constant alpha, one minus constant color',\n  'one minus constant alpha, constant color',\n  'one minus constant alpha, one minus constant color'\n]\n\nvar compareFuncs = {\n  'never': 512,\n  'less': 513,\n  '<': 513,\n  'equal': 514,\n  '=': 514,\n  '==': 514,\n  '===': 514,\n  'lequal': 515,\n  '<=': 515,\n  'greater': 516,\n  '>': 516,\n  'notequal': 517,\n  '!=': 517,\n  '!==': 517,\n  'gequal': 518,\n  '>=': 518,\n  'always': 519\n}\n\nvar stencilOps = {\n  '0': 0,\n  'zero': 0,\n  'keep': 7680,\n  'replace': 7681,\n  'increment': 7682,\n  'decrement': 7683,\n  'increment wrap': 34055,\n  'decrement wrap': 34056,\n  'invert': 5386\n}\n\nvar shaderType = {\n  'frag': GL_FRAGMENT_SHADER,\n  'vert': GL_VERTEX_SHADER\n}\n\nvar orientationType = {\n  'cw': GL_CW,\n  'ccw': GL_CCW\n}\n\nfunction isBufferArgs (x) {\n  return Array.isArray(x) ||\n    isTypedArray(x) ||\n    isNDArray(x)\n}\n\n// Make sure viewport is processed first\nfunction sortState (state) {\n  return state.sort(function (a, b) {\n    if (a === S_VIEWPORT) {\n      return -1\n    } else if (b === S_VIEWPORT) {\n      return 1\n    }\n    return (a < b) ? -1 : 1\n  })\n}\n\nfunction Declaration (thisDep, contextDep, propDep, append) {\n  this.thisDep = thisDep\n  this.contextDep = contextDep\n  this.propDep = propDep\n  this.append = append\n}\n\nfunction isStatic (decl) {\n  return decl && !(decl.thisDep || decl.contextDep || decl.propDep)\n}\n\nfunction createStaticDecl (append) {\n  return new Declaration(false, false, false, append)\n}\n\nfunction createDynamicDecl (dyn, append) {\n  var type = dyn.type\n  if (type === DYN_FUNC) {\n    var numArgs = dyn.data.length\n    return new Declaration(\n      true,\n      numArgs >= 1,\n      numArgs >= 2,\n      append)\n  } else if (type === DYN_THUNK) {\n    var data = dyn.data\n    return new Declaration(\n      data.thisDep,\n      data.contextDep,\n      data.propDep,\n      append)\n  } else {\n    return new Declaration(\n      type === DYN_STATE,\n      type === DYN_CONTEXT,\n      type === DYN_PROP,\n      append)\n  }\n}\n\nvar SCOPE_DECL = new Declaration(false, false, false, function () {})\n\nmodule.exports = function reglCore (\n  gl,\n  stringStore,\n  extensions,\n  limits,\n  bufferState,\n  elementState,\n  textureState,\n  framebufferState,\n  uniformState,\n  attributeState,\n  shaderState,\n  drawState,\n  contextState,\n  timer,\n  config) {\n  var AttributeRecord = attributeState.Record\n\n  var blendEquations = {\n    'add': 32774,\n    'subtract': 32778,\n    'reverse subtract': 32779\n  }\n  if (extensions.ext_blend_minmax) {\n    blendEquations.min = GL_MIN_EXT\n    blendEquations.max = GL_MAX_EXT\n  }\n\n  var extInstancing = extensions.angle_instanced_arrays\n  var extDrawBuffers = extensions.webgl_draw_buffers\n\n  // ===================================================\n  // ===================================================\n  // WEBGL STATE\n  // ===================================================\n  // ===================================================\n  var currentState = {\n    dirty: true,\n    profile: config.profile\n  }\n  var nextState = {}\n  var GL_STATE_NAMES = []\n  var GL_FLAGS = {}\n  var GL_VARIABLES = {}\n\n  function propName (name) {\n    return name.replace('.', '_')\n  }\n\n  function stateFlag (sname, cap, init) {\n    var name = propName(sname)\n    GL_STATE_NAMES.push(sname)\n    nextState[name] = currentState[name] = !!init\n    GL_FLAGS[name] = cap\n  }\n\n  function stateVariable (sname, func, init) {\n    var name = propName(sname)\n    GL_STATE_NAMES.push(sname)\n    if (Array.isArray(init)) {\n      currentState[name] = init.slice()\n      nextState[name] = init.slice()\n    } else {\n      currentState[name] = nextState[name] = init\n    }\n    GL_VARIABLES[name] = func\n  }\n\n  // Dithering\n  stateFlag(S_DITHER, GL_DITHER)\n\n  // Blending\n  stateFlag(S_BLEND_ENABLE, GL_BLEND)\n  stateVariable(S_BLEND_COLOR, 'blendColor', [0, 0, 0, 0])\n  stateVariable(S_BLEND_EQUATION, 'blendEquationSeparate',\n    [GL_FUNC_ADD, GL_FUNC_ADD])\n  stateVariable(S_BLEND_FUNC, 'blendFuncSeparate',\n    [GL_ONE, GL_ZERO, GL_ONE, GL_ZERO])\n\n  // Depth\n  stateFlag(S_DEPTH_ENABLE, GL_DEPTH_TEST, true)\n  stateVariable(S_DEPTH_FUNC, 'depthFunc', GL_LESS)\n  stateVariable(S_DEPTH_RANGE, 'depthRange', [0, 1])\n  stateVariable(S_DEPTH_MASK, 'depthMask', true)\n\n  // Color mask\n  stateVariable(S_COLOR_MASK, S_COLOR_MASK, [true, true, true, true])\n\n  // Face culling\n  stateFlag(S_CULL_ENABLE, GL_CULL_FACE)\n  stateVariable(S_CULL_FACE, 'cullFace', GL_BACK)\n\n  // Front face orientation\n  stateVariable(S_FRONT_FACE, S_FRONT_FACE, GL_CCW)\n\n  // Line width\n  stateVariable(S_LINE_WIDTH, S_LINE_WIDTH, 1)\n\n  // Polygon offset\n  stateFlag(S_POLYGON_OFFSET_ENABLE, GL_POLYGON_OFFSET_FILL)\n  stateVariable(S_POLYGON_OFFSET_OFFSET, 'polygonOffset', [0, 0])\n\n  // Sample coverage\n  stateFlag(S_SAMPLE_ALPHA, GL_SAMPLE_ALPHA_TO_COVERAGE)\n  stateFlag(S_SAMPLE_ENABLE, GL_SAMPLE_COVERAGE)\n  stateVariable(S_SAMPLE_COVERAGE, 'sampleCoverage', [1, false])\n\n  // Stencil\n  stateFlag(S_STENCIL_ENABLE, GL_STENCIL_TEST)\n  stateVariable(S_STENCIL_MASK, 'stencilMask', -1)\n  stateVariable(S_STENCIL_FUNC, 'stencilFunc', [GL_ALWAYS, 0, -1])\n  stateVariable(S_STENCIL_OPFRONT, 'stencilOpSeparate',\n    [GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP])\n  stateVariable(S_STENCIL_OPBACK, 'stencilOpSeparate',\n    [GL_BACK, GL_KEEP, GL_KEEP, GL_KEEP])\n\n  // Scissor\n  stateFlag(S_SCISSOR_ENABLE, GL_SCISSOR_TEST)\n  stateVariable(S_SCISSOR_BOX, 'scissor',\n    [0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])\n\n  // Viewport\n  stateVariable(S_VIEWPORT, S_VIEWPORT,\n    [0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight])\n\n  // ===================================================\n  // ===================================================\n  // ENVIRONMENT\n  // ===================================================\n  // ===================================================\n  var sharedState = {\n    gl: gl,\n    context: contextState,\n    strings: stringStore,\n    next: nextState,\n    current: currentState,\n    draw: drawState,\n    elements: elementState,\n    buffer: bufferState,\n    shader: shaderState,\n    attributes: attributeState.state,\n    uniforms: uniformState,\n    framebuffer: framebufferState,\n    extensions: extensions,\n\n    timer: timer,\n    isBufferArgs: isBufferArgs\n  }\n\n  var sharedConstants = {\n    primTypes: primTypes,\n    compareFuncs: compareFuncs,\n    blendFuncs: blendFuncs,\n    blendEquations: blendEquations,\n    stencilOps: stencilOps,\n    glTypes: glTypes,\n    orientationType: orientationType\n  }\n\n  check.optional(function () {\n    sharedState.isArrayLike = isArrayLike\n  })\n\n  if (extDrawBuffers) {\n    sharedConstants.backBuffer = [GL_BACK]\n    sharedConstants.drawBuffer = loop(limits.maxDrawbuffers, function (i) {\n      if (i === 0) {\n        return [0]\n      }\n      return loop(i, function (j) {\n        return GL_COLOR_ATTACHMENT0 + j\n      })\n    })\n  }\n\n  var drawCallCounter = 0\n  function createREGLEnvironment () {\n    var env = createEnvironment()\n    var link = env.link\n    var global = env.global\n    env.id = drawCallCounter++\n\n    env.batchId = '0'\n\n    // link shared state\n    var SHARED = link(sharedState)\n    var shared = env.shared = {\n      props: 'a0'\n    }\n    Object.keys(sharedState).forEach(function (prop) {\n      shared[prop] = global.def(SHARED, '.', prop)\n    })\n\n    // Inject runtime assertion stuff for debug builds\n    check.optional(function () {\n      env.CHECK = link(check)\n      env.commandStr = check.guessCommand()\n      env.command = link(env.commandStr)\n      env.assert = function (block, pred, message) {\n        block(\n          'if(!(', pred, '))',\n          this.CHECK, '.commandRaise(', link(message), ',', this.command, ');')\n      }\n\n      sharedConstants.invalidBlendCombinations = invalidBlendCombinations\n    })\n\n    // Copy GL state variables over\n    var nextVars = env.next = {}\n    var currentVars = env.current = {}\n    Object.keys(GL_VARIABLES).forEach(function (variable) {\n      if (Array.isArray(currentState[variable])) {\n        nextVars[variable] = global.def(shared.next, '.', variable)\n        currentVars[variable] = global.def(shared.current, '.', variable)\n      }\n    })\n\n    // Initialize shared constants\n    var constants = env.constants = {}\n    Object.keys(sharedConstants).forEach(function (name) {\n      constants[name] = global.def(JSON.stringify(sharedConstants[name]))\n    })\n\n    // Helper function for calling a block\n    env.invoke = function (block, x) {\n      switch (x.type) {\n        case DYN_FUNC:\n          var argList = [\n            'this',\n            shared.context,\n            shared.props,\n            env.batchId\n          ]\n          return block.def(\n            link(x.data), '.call(',\n              argList.slice(0, Math.max(x.data.length + 1, 4)),\n             ')')\n        case DYN_PROP:\n          return block.def(shared.props, x.data)\n        case DYN_CONTEXT:\n          return block.def(shared.context, x.data)\n        case DYN_STATE:\n          return block.def('this', x.data)\n        case DYN_THUNK:\n          x.data.append(env, block)\n          return x.data.ref\n      }\n    }\n\n    env.attribCache = {}\n\n    var scopeAttribs = {}\n    env.scopeAttrib = function (name) {\n      var id = stringStore.id(name)\n      if (id in scopeAttribs) {\n        return scopeAttribs[id]\n      }\n      var binding = attributeState.scope[id]\n      if (!binding) {\n        binding = attributeState.scope[id] = new AttributeRecord()\n      }\n      var result = scopeAttribs[id] = link(binding)\n      return result\n    }\n\n    return env\n  }\n\n  // ===================================================\n  // ===================================================\n  // PARSING\n  // ===================================================\n  // ===================================================\n  function parseProfile (options) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    var profileEnable\n    if (S_PROFILE in staticOptions) {\n      var value = !!staticOptions[S_PROFILE]\n      profileEnable = createStaticDecl(function (env, scope) {\n        return value\n      })\n      profileEnable.enable = value\n    } else if (S_PROFILE in dynamicOptions) {\n      var dyn = dynamicOptions[S_PROFILE]\n      profileEnable = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    }\n\n    return profileEnable\n  }\n\n  function parseFramebuffer (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    if (S_FRAMEBUFFER in staticOptions) {\n      var framebuffer = staticOptions[S_FRAMEBUFFER]\n      if (framebuffer) {\n        framebuffer = framebufferState.getFramebuffer(framebuffer)\n        check.command(framebuffer, 'invalid framebuffer object')\n        return createStaticDecl(function (env, block) {\n          var FRAMEBUFFER = env.link(framebuffer)\n          var shared = env.shared\n          block.set(\n            shared.framebuffer,\n            '.next',\n            FRAMEBUFFER)\n          var CONTEXT = shared.context\n          block.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_WIDTH,\n            FRAMEBUFFER + '.width')\n          block.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_HEIGHT,\n            FRAMEBUFFER + '.height')\n          return FRAMEBUFFER\n        })\n      } else {\n        return createStaticDecl(function (env, scope) {\n          var shared = env.shared\n          scope.set(\n            shared.framebuffer,\n            '.next',\n            'null')\n          var CONTEXT = shared.context\n          scope.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_WIDTH,\n            CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)\n          scope.set(\n            CONTEXT,\n            '.' + S_FRAMEBUFFER_HEIGHT,\n            CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)\n          return 'null'\n        })\n      }\n    } else if (S_FRAMEBUFFER in dynamicOptions) {\n      var dyn = dynamicOptions[S_FRAMEBUFFER]\n      return createDynamicDecl(dyn, function (env, scope) {\n        var FRAMEBUFFER_FUNC = env.invoke(scope, dyn)\n        var shared = env.shared\n        var FRAMEBUFFER_STATE = shared.framebuffer\n        var FRAMEBUFFER = scope.def(\n          FRAMEBUFFER_STATE, '.getFramebuffer(', FRAMEBUFFER_FUNC, ')')\n\n        check.optional(function () {\n          env.assert(scope,\n            '!' + FRAMEBUFFER_FUNC + '||' + FRAMEBUFFER,\n            'invalid framebuffer object')\n        })\n\n        scope.set(\n          FRAMEBUFFER_STATE,\n          '.next',\n          FRAMEBUFFER)\n        var CONTEXT = shared.context\n        scope.set(\n          CONTEXT,\n          '.' + S_FRAMEBUFFER_WIDTH,\n          FRAMEBUFFER + '?' + FRAMEBUFFER + '.width:' +\n          CONTEXT + '.' + S_DRAWINGBUFFER_WIDTH)\n        scope.set(\n          CONTEXT,\n          '.' + S_FRAMEBUFFER_HEIGHT,\n          FRAMEBUFFER +\n          '?' + FRAMEBUFFER + '.height:' +\n          CONTEXT + '.' + S_DRAWINGBUFFER_HEIGHT)\n        return FRAMEBUFFER\n      })\n    } else {\n      return null\n    }\n  }\n\n  function parseViewportScissor (options, framebuffer, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseBox (param) {\n      if (param in staticOptions) {\n        var box = staticOptions[param]\n        check.commandType(box, 'object', 'invalid ' + param, env.commandStr)\n\n        var isStatic = true\n        var x = box.x | 0\n        var y = box.y | 0\n        check.command(x >= 0 && y >= 0, 'invalid ' + param, env.commandStr)\n        var w, h\n        if ('width' in box) {\n          w = box.width | 0\n          check.command(w > 0, 'invalid ' + param, env.commandStr)\n        } else {\n          isStatic = false\n        }\n        if ('height' in box) {\n          h = box.height | 0\n          check.command(h > 0, 'invalid ' + param, env.commandStr)\n        } else {\n          isStatic = false\n        }\n\n        return new Declaration(\n          !isStatic && framebuffer && framebuffer.thisDep,\n          !isStatic && framebuffer && framebuffer.contextDep,\n          !isStatic && framebuffer && framebuffer.propDep,\n          function (env, scope) {\n            var CONTEXT = env.shared.context\n            var BOX_W = w\n            if (!('width' in box)) {\n              BOX_W = scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', x)\n            } else {\n              check.command(w > 0, 'invalid ' + param, env.commandStr)\n            }\n            var BOX_H = h\n            if (!('height' in box)) {\n              BOX_H = scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', y)\n            } else {\n              check.command(h > 0, 'invalid ' + param, env.commandStr)\n            }\n            return [x, y, BOX_W, BOX_H]\n          })\n      } else if (param in dynamicOptions) {\n        var dynBox = dynamicOptions[param]\n        var result = createDynamicDecl(dynBox, function (env, scope) {\n          var BOX = env.invoke(scope, dynBox)\n\n          check.optional(function () {\n            env.assert(scope,\n              BOX + '&&typeof ' + BOX + '===\"object\"',\n              'invalid ' + param)\n          })\n\n          var CONTEXT = env.shared.context\n          var BOX_X = scope.def(BOX, '.x|0')\n          var BOX_Y = scope.def(BOX, '.y|0')\n          var BOX_W = scope.def(\n            '\"width\" in ', BOX, '?', BOX, '.width|0:',\n            '(', CONTEXT, '.', S_FRAMEBUFFER_WIDTH, '-', BOX_X, ')')\n          var BOX_H = scope.def(\n            '\"height\" in ', BOX, '?', BOX, '.height|0:',\n            '(', CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', BOX_Y, ')')\n\n          check.optional(function () {\n            env.assert(scope,\n              BOX_X + '>=0&&' +\n              BOX_Y + '>=0&&' +\n              BOX_W + '>0&&' +\n              BOX_H + '>0',\n              'invalid ' + param)\n          })\n\n          return [BOX_X, BOX_Y, BOX_W, BOX_H]\n        })\n        if (framebuffer) {\n          result.thisDep = result.thisDep || framebuffer.thisDep\n          result.contextDep = result.contextDep || framebuffer.contextDep\n          result.propDep = result.propDep || framebuffer.propDep\n        }\n        return result\n      } else if (framebuffer) {\n        return new Declaration(\n          framebuffer.thisDep,\n          framebuffer.contextDep,\n          framebuffer.propDep,\n          function (env, scope) {\n            var CONTEXT = env.shared.context\n            return [\n              0, 0,\n              scope.def(CONTEXT, '.', S_FRAMEBUFFER_WIDTH),\n              scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT)]\n          })\n      } else {\n        return null\n      }\n    }\n\n    var viewport = parseBox(S_VIEWPORT)\n\n    if (viewport) {\n      var prevViewport = viewport\n      viewport = new Declaration(\n        viewport.thisDep,\n        viewport.contextDep,\n        viewport.propDep,\n        function (env, scope) {\n          var VIEWPORT = prevViewport.append(env, scope)\n          var CONTEXT = env.shared.context\n          scope.set(\n            CONTEXT,\n            '.' + S_VIEWPORT_WIDTH,\n            VIEWPORT[2])\n          scope.set(\n            CONTEXT,\n            '.' + S_VIEWPORT_HEIGHT,\n            VIEWPORT[3])\n          return VIEWPORT\n        })\n    }\n\n    return {\n      viewport: viewport,\n      scissor_box: parseBox(S_SCISSOR_BOX)\n    }\n  }\n\n  function parseProgram (options) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseShader (name) {\n      if (name in staticOptions) {\n        var id = stringStore.id(staticOptions[name])\n        check.optional(function () {\n          shaderState.shader(shaderType[name], id, check.guessCommand())\n        })\n        var result = createStaticDecl(function () {\n          return id\n        })\n        result.id = id\n        return result\n      } else if (name in dynamicOptions) {\n        var dyn = dynamicOptions[name]\n        return createDynamicDecl(dyn, function (env, scope) {\n          var str = env.invoke(scope, dyn)\n          var id = scope.def(env.shared.strings, '.id(', str, ')')\n          check.optional(function () {\n            scope(\n              env.shared.shader, '.shader(',\n              shaderType[name], ',',\n              id, ',',\n              env.command, ');')\n          })\n          return id\n        })\n      }\n      return null\n    }\n\n    var frag = parseShader(S_FRAG)\n    var vert = parseShader(S_VERT)\n\n    var program = null\n    var progVar\n    if (isStatic(frag) && isStatic(vert)) {\n      program = shaderState.program(vert.id, frag.id)\n      progVar = createStaticDecl(function (env, scope) {\n        return env.link(program)\n      })\n    } else {\n      progVar = new Declaration(\n        (frag && frag.thisDep) || (vert && vert.thisDep),\n        (frag && frag.contextDep) || (vert && vert.contextDep),\n        (frag && frag.propDep) || (vert && vert.propDep),\n        function (env, scope) {\n          var SHADER_STATE = env.shared.shader\n          var fragId\n          if (frag) {\n            fragId = frag.append(env, scope)\n          } else {\n            fragId = scope.def(SHADER_STATE, '.', S_FRAG)\n          }\n          var vertId\n          if (vert) {\n            vertId = vert.append(env, scope)\n          } else {\n            vertId = scope.def(SHADER_STATE, '.', S_VERT)\n          }\n          var progDef = SHADER_STATE + '.program(' + vertId + ',' + fragId\n          check.optional(function () {\n            progDef += ',' + env.command\n          })\n          return scope.def(progDef + ')')\n        })\n    }\n\n    return {\n      frag: frag,\n      vert: vert,\n      progVar: progVar,\n      program: program\n    }\n  }\n\n  function parseDraw (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    function parseElements () {\n      if (S_ELEMENTS in staticOptions) {\n        var elements = staticOptions[S_ELEMENTS]\n        if (isBufferArgs(elements)) {\n          elements = elementState.getElements(elementState.create(elements, true))\n        } else if (elements) {\n          elements = elementState.getElements(elements)\n          check.command(elements, 'invalid elements', env.commandStr)\n        }\n        var result = createStaticDecl(function (env, scope) {\n          if (elements) {\n            var result = env.link(elements)\n            env.ELEMENTS = result\n            return result\n          }\n          env.ELEMENTS = null\n          return null\n        })\n        result.value = elements\n        return result\n      } else if (S_ELEMENTS in dynamicOptions) {\n        var dyn = dynamicOptions[S_ELEMENTS]\n        return createDynamicDecl(dyn, function (env, scope) {\n          var shared = env.shared\n\n          var IS_BUFFER_ARGS = shared.isBufferArgs\n          var ELEMENT_STATE = shared.elements\n\n          var elementDefn = env.invoke(scope, dyn)\n          var elements = scope.def('null')\n          var elementStream = scope.def(IS_BUFFER_ARGS, '(', elementDefn, ')')\n\n          var ifte = env.cond(elementStream)\n            .then(elements, '=', ELEMENT_STATE, '.createStream(', elementDefn, ');')\n            .else(elements, '=', ELEMENT_STATE, '.getElements(', elementDefn, ');')\n\n          check.optional(function () {\n            env.assert(ifte.else,\n              '!' + elementDefn + '||' + elements,\n              'invalid elements')\n          })\n\n          scope.entry(ifte)\n          scope.exit(\n            env.cond(elementStream)\n              .then(ELEMENT_STATE, '.destroyStream(', elements, ');'))\n\n          env.ELEMENTS = elements\n\n          return elements\n        })\n      }\n\n      return null\n    }\n\n    var elements = parseElements()\n\n    function parsePrimitive () {\n      if (S_PRIMITIVE in staticOptions) {\n        var primitive = staticOptions[S_PRIMITIVE]\n        check.commandParameter(primitive, primTypes, 'invalid primitve', env.commandStr)\n        return createStaticDecl(function (env, scope) {\n          return primTypes[primitive]\n        })\n      } else if (S_PRIMITIVE in dynamicOptions) {\n        var dynPrimitive = dynamicOptions[S_PRIMITIVE]\n        return createDynamicDecl(dynPrimitive, function (env, scope) {\n          var PRIM_TYPES = env.constants.primTypes\n          var prim = env.invoke(scope, dynPrimitive)\n          check.optional(function () {\n            env.assert(scope,\n              prim + ' in ' + PRIM_TYPES,\n              'invalid primitive, must be one of ' + Object.keys(primTypes))\n          })\n          return scope.def(PRIM_TYPES, '[', prim, ']')\n        })\n      } else if (elements) {\n        if (isStatic(elements)) {\n          if (elements.value) {\n            return createStaticDecl(function (env, scope) {\n              return scope.def(env.ELEMENTS, '.primType')\n            })\n          } else {\n            return createStaticDecl(function () {\n              return GL_TRIANGLES\n            })\n          }\n        } else {\n          return new Declaration(\n            elements.thisDep,\n            elements.contextDep,\n            elements.propDep,\n            function (env, scope) {\n              var elements = env.ELEMENTS\n              return scope.def(elements, '?', elements, '.primType:', GL_TRIANGLES)\n            })\n        }\n      }\n      return null\n    }\n\n    function parseParam (param, isOffset) {\n      if (param in staticOptions) {\n        var value = staticOptions[param] | 0\n        check.command(!isOffset || value >= 0, 'invalid ' + param, env.commandStr)\n        return createStaticDecl(function (env, scope) {\n          if (isOffset) {\n            env.OFFSET = value\n          }\n          return value\n        })\n      } else if (param in dynamicOptions) {\n        var dynValue = dynamicOptions[param]\n        return createDynamicDecl(dynValue, function (env, scope) {\n          var result = env.invoke(scope, dynValue)\n          if (isOffset) {\n            env.OFFSET = result\n            check.optional(function () {\n              env.assert(scope,\n                result + '>=0',\n                'invalid ' + param)\n            })\n          }\n          return result\n        })\n      } else if (isOffset && elements) {\n        return createStaticDecl(function (env, scope) {\n          env.OFFSET = '0'\n          return 0\n        })\n      }\n      return null\n    }\n\n    var OFFSET = parseParam(S_OFFSET, true)\n\n    function parseVertCount () {\n      if (S_COUNT in staticOptions) {\n        var count = staticOptions[S_COUNT] | 0\n        check.command(\n          typeof count === 'number' && count >= 0, 'invalid vertex count', env.commandStr)\n        return createStaticDecl(function () {\n          return count\n        })\n      } else if (S_COUNT in dynamicOptions) {\n        var dynCount = dynamicOptions[S_COUNT]\n        return createDynamicDecl(dynCount, function (env, scope) {\n          var result = env.invoke(scope, dynCount)\n          check.optional(function () {\n            env.assert(scope,\n              'typeof ' + result + '===\"number\"&&' +\n              result + '>=0&&' +\n              result + '===(' + result + '|0)',\n              'invalid vertex count')\n          })\n          return result\n        })\n      } else if (elements) {\n        if (isStatic(elements)) {\n          if (elements) {\n            if (OFFSET) {\n              return new Declaration(\n                OFFSET.thisDep,\n                OFFSET.contextDep,\n                OFFSET.propDep,\n                function (env, scope) {\n                  var result = scope.def(\n                    env.ELEMENTS, '.vertCount-', env.OFFSET)\n\n                  check.optional(function () {\n                    env.assert(scope,\n                      result + '>=0',\n                      'invalid vertex offset/element buffer too small')\n                  })\n\n                  return result\n                })\n            } else {\n              return createStaticDecl(function (env, scope) {\n                return scope.def(env.ELEMENTS, '.vertCount')\n              })\n            }\n          } else {\n            var result = createStaticDecl(function () {\n              return -1\n            })\n            check.optional(function () {\n              result.MISSING = true\n            })\n            return result\n          }\n        } else {\n          var variable = new Declaration(\n            elements.thisDep || OFFSET.thisDep,\n            elements.contextDep || OFFSET.contextDep,\n            elements.propDep || OFFSET.propDep,\n            function (env, scope) {\n              var elements = env.ELEMENTS\n              if (env.OFFSET) {\n                return scope.def(elements, '?', elements, '.vertCount-',\n                  env.OFFSET, ':-1')\n              }\n              return scope.def(elements, '?', elements, '.vertCount:-1')\n            })\n          check.optional(function () {\n            variable.DYNAMIC = true\n          })\n          return variable\n        }\n      }\n      return null\n    }\n\n    return {\n      elements: elements,\n      primitive: parsePrimitive(),\n      count: parseVertCount(),\n      instances: parseParam(S_INSTANCES, false),\n      offset: OFFSET\n    }\n  }\n\n  function parseGLState (options, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    var STATE = {}\n\n    GL_STATE_NAMES.forEach(function (prop) {\n      var param = propName(prop)\n\n      function parseParam (parseStatic, parseDynamic) {\n        if (prop in staticOptions) {\n          var value = parseStatic(staticOptions[prop])\n          STATE[param] = createStaticDecl(function () {\n            return value\n          })\n        } else if (prop in dynamicOptions) {\n          var dyn = dynamicOptions[prop]\n          STATE[param] = createDynamicDecl(dyn, function (env, scope) {\n            return parseDynamic(env, scope, env.invoke(scope, dyn))\n          })\n        }\n      }\n\n      switch (prop) {\n        case S_CULL_ENABLE:\n        case S_BLEND_ENABLE:\n        case S_DITHER:\n        case S_STENCIL_ENABLE:\n        case S_DEPTH_ENABLE:\n        case S_SCISSOR_ENABLE:\n        case S_POLYGON_OFFSET_ENABLE:\n        case S_SAMPLE_ALPHA:\n        case S_SAMPLE_ENABLE:\n        case S_DEPTH_MASK:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'boolean', prop, env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"boolean\"',\n                  'invalid flag ' + prop, env.commandStr)\n              })\n              return value\n            })\n\n        case S_DEPTH_FUNC:\n          return parseParam(\n            function (value) {\n              check.commandParameter(value, compareFuncs, 'invalid ' + prop, env.commandStr)\n              return compareFuncs[value]\n            },\n            function (env, scope, value) {\n              var COMPARE_FUNCS = env.constants.compareFuncs\n              check.optional(function () {\n                env.assert(scope,\n                  value + ' in ' + COMPARE_FUNCS,\n                  'invalid ' + prop + ', must be one of ' + Object.keys(compareFuncs))\n              })\n              return scope.def(COMPARE_FUNCS, '[', value, ']')\n            })\n\n        case S_DEPTH_RANGE:\n          return parseParam(\n            function (value) {\n              check.command(\n                isArrayLike(value) &&\n                value.length === 2 &&\n                typeof value[0] === 'number' &&\n                typeof value[1] === 'number' &&\n                value[0] <= value[1],\n                'depth range is 2d array',\n                env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===2&&' +\n                  'typeof ' + value + '[0]===\"number\"&&' +\n                  'typeof ' + value + '[1]===\"number\"&&' +\n                  value + '[0]<=' + value + '[1]',\n                  'depth range must be a 2d array')\n              })\n\n              var Z_NEAR = scope.def('+', value, '[0]')\n              var Z_FAR = scope.def('+', value, '[1]')\n              return [Z_NEAR, Z_FAR]\n            })\n\n        case S_BLEND_FUNC:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'object', 'blend.func', env.commandStr)\n              var srcRGB = ('srcRGB' in value ? value.srcRGB : value.src)\n              var srcAlpha = ('srcAlpha' in value ? value.srcAlpha : value.src)\n              var dstRGB = ('dstRGB' in value ? value.dstRGB : value.dst)\n              var dstAlpha = ('dstAlpha' in value ? value.dstAlpha : value.dst)\n              check.commandParameter(srcRGB, blendFuncs, param + '.srcRGB', env.commandStr)\n              check.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha', env.commandStr)\n              check.commandParameter(dstRGB, blendFuncs, param + '.dstRGB', env.commandStr)\n              check.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha', env.commandStr)\n\n              check.command(\n                (invalidBlendCombinations.indexOf(srcRGB + ', ' + dstRGB) === -1),\n                'unallowed blending combination (srcRGB, dstRGB) = (' + srcRGB + ', ' + dstRGB + ')', env.commandStr)\n\n              return [\n                blendFuncs[srcRGB],\n                blendFuncs[dstRGB],\n                blendFuncs[srcAlpha],\n                blendFuncs[dstAlpha]\n              ]\n            },\n            function (env, scope, value) {\n              var BLEND_FUNCS = env.constants.blendFuncs\n\n              check.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid blend func, must be an object')\n              })\n\n              function read (prefix, suffix) {\n                var func = scope.def(\n                  '\"', prefix, suffix, '\" in ', value,\n                  '?', value, '.', prefix, suffix,\n                  ':', value, '.', prefix)\n\n                check.optional(function () {\n                  env.assert(scope,\n                    func + ' in ' + BLEND_FUNCS,\n                    'invalid ' + prop + '.' + prefix + suffix + ', must be one of ' + Object.keys(blendFuncs))\n                })\n\n                return func\n              }\n\n              var srcRGB = read('src', 'RGB')\n              var dstRGB = read('dst', 'RGB')\n\n              check.optional(function () {\n                var INVALID_BLEND_COMBINATIONS = env.constants.invalidBlendCombinations\n\n                env.assert(scope,\n                           INVALID_BLEND_COMBINATIONS +\n                           '.indexOf(' + srcRGB + '+\", \"+' + dstRGB + ') === -1 ',\n                           'unallowed blending combination for (srcRGB, dstRGB)'\n                          )\n              })\n\n              var SRC_RGB = scope.def(BLEND_FUNCS, '[', srcRGB, ']')\n              var SRC_ALPHA = scope.def(BLEND_FUNCS, '[', read('src', 'Alpha'), ']')\n              var DST_RGB = scope.def(BLEND_FUNCS, '[', dstRGB, ']')\n              var DST_ALPHA = scope.def(BLEND_FUNCS, '[', read('dst', 'Alpha'), ']')\n\n              return [SRC_RGB, DST_RGB, SRC_ALPHA, DST_ALPHA]\n            })\n\n        case S_BLEND_EQUATION:\n          return parseParam(\n            function (value) {\n              if (typeof value === 'string') {\n                check.commandParameter(value, blendEquations, 'invalid ' + prop, env.commandStr)\n                return [\n                  blendEquations[value],\n                  blendEquations[value]\n                ]\n              } else if (typeof value === 'object') {\n                check.commandParameter(\n                  value.rgb, blendEquations, prop + '.rgb', env.commandStr)\n                check.commandParameter(\n                  value.alpha, blendEquations, prop + '.alpha', env.commandStr)\n                return [\n                  blendEquations[value.rgb],\n                  blendEquations[value.alpha]\n                ]\n              } else {\n                check.commandRaise('invalid blend.equation', env.commandStr)\n              }\n            },\n            function (env, scope, value) {\n              var BLEND_EQUATIONS = env.constants.blendEquations\n\n              var RGB = scope.def()\n              var ALPHA = scope.def()\n\n              var ifte = env.cond('typeof ', value, '===\"string\"')\n\n              check.optional(function () {\n                function checkProp (block, name, value) {\n                  env.assert(block,\n                    value + ' in ' + BLEND_EQUATIONS,\n                    'invalid ' + name + ', must be one of ' + Object.keys(blendEquations))\n                }\n                checkProp(ifte.then, prop, value)\n\n                env.assert(ifte.else,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n                checkProp(ifte.else, prop + '.rgb', value + '.rgb')\n                checkProp(ifte.else, prop + '.alpha', value + '.alpha')\n              })\n\n              ifte.then(\n                RGB, '=', ALPHA, '=', BLEND_EQUATIONS, '[', value, '];')\n              ifte.else(\n                RGB, '=', BLEND_EQUATIONS, '[', value, '.rgb];',\n                ALPHA, '=', BLEND_EQUATIONS, '[', value, '.alpha];')\n\n              scope(ifte)\n\n              return [RGB, ALPHA]\n            })\n\n        case S_BLEND_COLOR:\n          return parseParam(\n            function (value) {\n              check.command(\n                isArrayLike(value) &&\n                value.length === 4,\n                'blend.color must be a 4d array', env.commandStr)\n              return loop(4, function (i) {\n                return +value[i]\n              })\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===4',\n                  'blend.color must be a 4d array')\n              })\n              return loop(4, function (i) {\n                return scope.def('+', value, '[', i, ']')\n              })\n            })\n\n        case S_STENCIL_MASK:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'number', param, env.commandStr)\n              return value | 0\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"number\"',\n                  'invalid stencil.mask')\n              })\n              return scope.def(value, '|0')\n            })\n\n        case S_STENCIL_FUNC:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'object', param, env.commandStr)\n              var cmp = value.cmp || 'keep'\n              var ref = value.ref || 0\n              var mask = 'mask' in value ? value.mask : -1\n              check.commandParameter(cmp, compareFuncs, prop + '.cmp', env.commandStr)\n              check.commandType(ref, 'number', prop + '.ref', env.commandStr)\n              check.commandType(mask, 'number', prop + '.mask', env.commandStr)\n              return [\n                compareFuncs[cmp],\n                ref,\n                mask\n              ]\n            },\n            function (env, scope, value) {\n              var COMPARE_FUNCS = env.constants.compareFuncs\n              check.optional(function () {\n                function assert () {\n                  env.assert(scope,\n                    Array.prototype.join.call(arguments, ''),\n                    'invalid stencil.func')\n                }\n                assert(value + '&&typeof ', value, '===\"object\"')\n                assert('!(\"cmp\" in ', value, ')||(',\n                  value, '.cmp in ', COMPARE_FUNCS, ')')\n              })\n              var cmp = scope.def(\n                '\"cmp\" in ', value,\n                '?', COMPARE_FUNCS, '[', value, '.cmp]',\n                ':', GL_KEEP)\n              var ref = scope.def(value, '.ref|0')\n              var mask = scope.def(\n                '\"mask\" in ', value,\n                '?', value, '.mask|0:-1')\n              return [cmp, ref, mask]\n            })\n\n        case S_STENCIL_OPFRONT:\n        case S_STENCIL_OPBACK:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'object', param, env.commandStr)\n              var fail = value.fail || 'keep'\n              var zfail = value.zfail || 'keep'\n              var zpass = value.zpass || 'keep'\n              check.commandParameter(fail, stencilOps, prop + '.fail', env.commandStr)\n              check.commandParameter(zfail, stencilOps, prop + '.zfail', env.commandStr)\n              check.commandParameter(zpass, stencilOps, prop + '.zpass', env.commandStr)\n              return [\n                prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,\n                stencilOps[fail],\n                stencilOps[zfail],\n                stencilOps[zpass]\n              ]\n            },\n            function (env, scope, value) {\n              var STENCIL_OPS = env.constants.stencilOps\n\n              check.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n              })\n\n              function read (name) {\n                check.optional(function () {\n                  env.assert(scope,\n                    '!(\"' + name + '\" in ' + value + ')||' +\n                    '(' + value + '.' + name + ' in ' + STENCIL_OPS + ')',\n                    'invalid ' + prop + '.' + name + ', must be one of ' + Object.keys(stencilOps))\n                })\n\n                return scope.def(\n                  '\"', name, '\" in ', value,\n                  '?', STENCIL_OPS, '[', value, '.', name, ']:',\n                  GL_KEEP)\n              }\n\n              return [\n                prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,\n                read('fail'),\n                read('zfail'),\n                read('zpass')\n              ]\n            })\n\n        case S_POLYGON_OFFSET_OFFSET:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'object', param, env.commandStr)\n              var factor = value.factor | 0\n              var units = value.units | 0\n              check.commandType(factor, 'number', param + '.factor', env.commandStr)\n              check.commandType(units, 'number', param + '.units', env.commandStr)\n              return [factor, units]\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid ' + prop)\n              })\n\n              var FACTOR = scope.def(value, '.factor|0')\n              var UNITS = scope.def(value, '.units|0')\n\n              return [FACTOR, UNITS]\n            })\n\n        case S_CULL_FACE:\n          return parseParam(\n            function (value) {\n              var face = 0\n              if (value === 'front') {\n                face = GL_FRONT\n              } else if (value === 'back') {\n                face = GL_BACK\n              }\n              check.command(!!face, param, env.commandStr)\n              return face\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  value + '===\"front\"||' +\n                  value + '===\"back\"',\n                  'invalid cull.face')\n              })\n              return scope.def(value, '===\"front\"?', GL_FRONT, ':', GL_BACK)\n            })\n\n        case S_LINE_WIDTH:\n          return parseParam(\n            function (value) {\n              check.command(\n                typeof value === 'number' &&\n                value >= limits.lineWidthDims[0] &&\n                value <= limits.lineWidthDims[1],\n                'invalid line width, must positive number between ' +\n                limits.lineWidthDims[0] + ' and ' + limits.lineWidthDims[1], env.commandStr)\n              return value\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  'typeof ' + value + '===\"number\"&&' +\n                  value + '>=' + limits.lineWidthDims[0] + '&&' +\n                  value + '<=' + limits.lineWidthDims[1],\n                  'invalid line width')\n              })\n\n              return value\n            })\n\n        case S_FRONT_FACE:\n          return parseParam(\n            function (value) {\n              check.commandParameter(value, orientationType, param, env.commandStr)\n              return orientationType[value]\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  value + '===\"cw\"||' +\n                  value + '===\"ccw\"',\n                  'invalid frontFace, must be one of cw,ccw')\n              })\n              return scope.def(value + '===\"cw\"?' + GL_CW + ':' + GL_CCW)\n            })\n\n        case S_COLOR_MASK:\n          return parseParam(\n            function (value) {\n              check.command(\n                isArrayLike(value) && value.length === 4,\n                'color.mask must be length 4 array', env.commandStr)\n              return value.map(function (v) { return !!v })\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  env.shared.isArrayLike + '(' + value + ')&&' +\n                  value + '.length===4',\n                  'invalid color.mask')\n              })\n              return loop(4, function (i) {\n                return '!!' + value + '[' + i + ']'\n              })\n            })\n\n        case S_SAMPLE_COVERAGE:\n          return parseParam(\n            function (value) {\n              check.command(typeof value === 'object' && value, param, env.commandStr)\n              var sampleValue = 'value' in value ? value.value : 1\n              var sampleInvert = !!value.invert\n              check.command(\n                typeof sampleValue === 'number' &&\n                sampleValue >= 0 && sampleValue <= 1,\n                'sample.coverage.value must be a number between 0 and 1', env.commandStr)\n              return [sampleValue, sampleInvert]\n            },\n            function (env, scope, value) {\n              check.optional(function () {\n                env.assert(scope,\n                  value + '&&typeof ' + value + '===\"object\"',\n                  'invalid sample.coverage')\n              })\n              var VALUE = scope.def(\n                '\"value\" in ', value, '?+', value, '.value:1')\n              var INVERT = scope.def('!!', value, '.invert')\n              return [VALUE, INVERT]\n            })\n      }\n    })\n\n    return STATE\n  }\n\n  function parseUniforms (uniforms, env) {\n    var staticUniforms = uniforms.static\n    var dynamicUniforms = uniforms.dynamic\n\n    var UNIFORMS = {}\n\n    Object.keys(staticUniforms).forEach(function (name) {\n      var value = staticUniforms[name]\n      var result\n      if (typeof value === 'number' ||\n          typeof value === 'boolean') {\n        result = createStaticDecl(function () {\n          return value\n        })\n      } else if (typeof value === 'function') {\n        var reglType = value._reglType\n        if (reglType === 'texture2d' ||\n            reglType === 'textureCube') {\n          result = createStaticDecl(function (env) {\n            return env.link(value)\n          })\n        } else if (reglType === 'framebuffer' ||\n                   reglType === 'framebufferCube') {\n          check.command(value.color.length > 0,\n            'missing color attachment for framebuffer sent to uniform \"' + name + '\"', env.commandStr)\n          result = createStaticDecl(function (env) {\n            return env.link(value.color[0])\n          })\n        } else {\n          check.commandRaise('invalid data for uniform \"' + name + '\"', env.commandStr)\n        }\n      } else if (isArrayLike(value)) {\n        result = createStaticDecl(function (env) {\n          var ITEM = env.global.def('[',\n            loop(value.length, function (i) {\n              check.command(\n                typeof value[i] === 'number' ||\n                typeof value[i] === 'boolean',\n                'invalid uniform ' + name, env.commandStr)\n              return value[i]\n            }), ']')\n          return ITEM\n        })\n      } else {\n        check.commandRaise('invalid or missing data for uniform \"' + name + '\"', env.commandStr)\n      }\n      result.value = value\n      UNIFORMS[name] = result\n    })\n\n    Object.keys(dynamicUniforms).forEach(function (key) {\n      var dyn = dynamicUniforms[key]\n      UNIFORMS[key] = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    })\n\n    return UNIFORMS\n  }\n\n  function parseAttributes (attributes, env) {\n    var staticAttributes = attributes.static\n    var dynamicAttributes = attributes.dynamic\n\n    var attributeDefs = {}\n\n    Object.keys(staticAttributes).forEach(function (attribute) {\n      var value = staticAttributes[attribute]\n      var id = stringStore.id(attribute)\n\n      var record = new AttributeRecord()\n      if (isBufferArgs(value)) {\n        record.state = ATTRIB_STATE_POINTER\n        record.buffer = bufferState.getBuffer(\n          bufferState.create(value, GL_ARRAY_BUFFER, false, true))\n        record.type = 0\n      } else {\n        var buffer = bufferState.getBuffer(value)\n        if (buffer) {\n          record.state = ATTRIB_STATE_POINTER\n          record.buffer = buffer\n          record.type = 0\n        } else {\n          check.command(typeof value === 'object' && value,\n            'invalid data for attribute ' + attribute, env.commandStr)\n          if (value.constant) {\n            var constant = value.constant\n            record.buffer = 'null'\n            record.state = ATTRIB_STATE_CONSTANT\n            if (typeof constant === 'number') {\n              record.x = constant\n            } else {\n              check.command(\n                isArrayLike(constant) &&\n                constant.length > 0 &&\n                constant.length <= 4,\n                'invalid constant for attribute ' + attribute, env.commandStr)\n              CUTE_COMPONENTS.forEach(function (c, i) {\n                if (i < constant.length) {\n                  record[c] = constant[i]\n                }\n              })\n            }\n          } else {\n            if (isBufferArgs(value.buffer)) {\n              buffer = bufferState.getBuffer(\n                bufferState.create(value.buffer, GL_ARRAY_BUFFER, false, true))\n            } else {\n              buffer = bufferState.getBuffer(value.buffer)\n            }\n            check.command(!!buffer, 'missing buffer for attribute \"' + attribute + '\"', env.commandStr)\n\n            var offset = value.offset | 0\n            check.command(offset >= 0,\n              'invalid offset for attribute \"' + attribute + '\"', env.commandStr)\n\n            var stride = value.stride | 0\n            check.command(stride >= 0 && stride < 256,\n              'invalid stride for attribute \"' + attribute + '\", must be integer betweeen [0, 255]', env.commandStr)\n\n            var size = value.size | 0\n            check.command(!('size' in value) || (size > 0 && size <= 4),\n              'invalid size for attribute \"' + attribute + '\", must be 1,2,3,4', env.commandStr)\n\n            var normalized = !!value.normalized\n\n            var type = 0\n            if ('type' in value) {\n              check.commandParameter(\n                value.type, glTypes,\n                'invalid type for attribute ' + attribute, env.commandStr)\n              type = glTypes[value.type]\n            }\n\n            var divisor = value.divisor | 0\n            if ('divisor' in value) {\n              check.command(divisor === 0 || extInstancing,\n                'cannot specify divisor for attribute \"' + attribute + '\", instancing not supported', env.commandStr)\n              check.command(divisor >= 0,\n                'invalid divisor for attribute \"' + attribute + '\"', env.commandStr)\n            }\n\n            check.optional(function () {\n              var command = env.commandStr\n\n              var VALID_KEYS = [\n                'buffer',\n                'offset',\n                'divisor',\n                'normalized',\n                'type',\n                'size',\n                'stride'\n              ]\n\n              Object.keys(value).forEach(function (prop) {\n                check.command(\n                  VALID_KEYS.indexOf(prop) >= 0,\n                  'unknown parameter \"' + prop + '\" for attribute pointer \"' + attribute + '\" (valid parameters are ' + VALID_KEYS + ')',\n                  command)\n              })\n            })\n\n            record.buffer = buffer\n            record.state = ATTRIB_STATE_POINTER\n            record.size = size\n            record.normalized = normalized\n            record.type = type || buffer.dtype\n            record.offset = offset\n            record.stride = stride\n            record.divisor = divisor\n          }\n        }\n      }\n\n      attributeDefs[attribute] = createStaticDecl(function (env, scope) {\n        var cache = env.attribCache\n        if (id in cache) {\n          return cache[id]\n        }\n        var result = {\n          isStream: false\n        }\n        Object.keys(record).forEach(function (key) {\n          result[key] = record[key]\n        })\n        if (record.buffer) {\n          result.buffer = env.link(record.buffer)\n          result.type = result.type || (result.buffer + '.dtype')\n        }\n        cache[id] = result\n        return result\n      })\n    })\n\n    Object.keys(dynamicAttributes).forEach(function (attribute) {\n      var dyn = dynamicAttributes[attribute]\n\n      function appendAttributeCode (env, block) {\n        var VALUE = env.invoke(block, dyn)\n\n        var shared = env.shared\n\n        var IS_BUFFER_ARGS = shared.isBufferArgs\n        var BUFFER_STATE = shared.buffer\n\n        // Perform validation on attribute\n        check.optional(function () {\n          env.assert(block,\n            VALUE + '&&(typeof ' + VALUE + '===\"object\"||typeof ' +\n            VALUE + '===\"function\")&&(' +\n            IS_BUFFER_ARGS + '(' + VALUE + ')||' +\n            BUFFER_STATE + '.getBuffer(' + VALUE + ')||' +\n            BUFFER_STATE + '.getBuffer(' + VALUE + '.buffer)||' +\n            IS_BUFFER_ARGS + '(' + VALUE + '.buffer)||' +\n            '(\"constant\" in ' + VALUE +\n            '&&(typeof ' + VALUE + '.constant===\"number\"||' +\n            shared.isArrayLike + '(' + VALUE + '.constant))))',\n            'invalid dynamic attribute \"' + attribute + '\"')\n        })\n\n        // allocate names for result\n        var result = {\n          isStream: block.def(false)\n        }\n        var defaultRecord = new AttributeRecord()\n        defaultRecord.state = ATTRIB_STATE_POINTER\n        Object.keys(defaultRecord).forEach(function (key) {\n          result[key] = block.def('' + defaultRecord[key])\n        })\n\n        var BUFFER = result.buffer\n        var TYPE = result.type\n        block(\n          'if(', IS_BUFFER_ARGS, '(', VALUE, ')){',\n          result.isStream, '=true;',\n          BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, ');',\n          TYPE, '=', BUFFER, '.dtype;',\n          '}else{',\n          BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, ');',\n          'if(', BUFFER, '){',\n          TYPE, '=', BUFFER, '.dtype;',\n          '}else if(\"constant\" in ', VALUE, '){',\n          result.state, '=', ATTRIB_STATE_CONSTANT, ';',\n          'if(typeof ' + VALUE + '.constant === \"number\"){',\n          result[CUTE_COMPONENTS[0]], '=', VALUE, '.constant;',\n          CUTE_COMPONENTS.slice(1).map(function (n) {\n            return result[n]\n          }).join('='), '=0;',\n          '}else{',\n          CUTE_COMPONENTS.map(function (name, i) {\n            return (\n              result[name] + '=' + VALUE + '.constant.length>=' + i +\n              '?' + VALUE + '.constant[' + i + ']:0;'\n            )\n          }).join(''),\n          '}}else{',\n          'if(', IS_BUFFER_ARGS, '(', VALUE, '.buffer)){',\n          BUFFER, '=', BUFFER_STATE, '.createStream(', GL_ARRAY_BUFFER, ',', VALUE, '.buffer);',\n          '}else{',\n          BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, '.buffer);',\n          '}',\n          TYPE, '=\"type\" in ', VALUE, '?',\n          shared.glTypes, '[', VALUE, '.type]:', BUFFER, '.dtype;',\n          result.normalized, '=!!', VALUE, '.normalized;')\n        function emitReadRecord (name) {\n          block(result[name], '=', VALUE, '.', name, '|0;')\n        }\n        emitReadRecord('size')\n        emitReadRecord('offset')\n        emitReadRecord('stride')\n        emitReadRecord('divisor')\n\n        block('}}')\n\n        block.exit(\n          'if(', result.isStream, '){',\n          BUFFER_STATE, '.destroyStream(', BUFFER, ');',\n          '}')\n\n        return result\n      }\n\n      attributeDefs[attribute] = createDynamicDecl(dyn, appendAttributeCode)\n    })\n\n    return attributeDefs\n  }\n\n  function parseContext (context) {\n    var staticContext = context.static\n    var dynamicContext = context.dynamic\n    var result = {}\n\n    Object.keys(staticContext).forEach(function (name) {\n      var value = staticContext[name]\n      result[name] = createStaticDecl(function (env, scope) {\n        if (typeof value === 'number' || typeof value === 'boolean') {\n          return '' + value\n        } else {\n          return env.link(value)\n        }\n      })\n    })\n\n    Object.keys(dynamicContext).forEach(function (name) {\n      var dyn = dynamicContext[name]\n      result[name] = createDynamicDecl(dyn, function (env, scope) {\n        return env.invoke(scope, dyn)\n      })\n    })\n\n    return result\n  }\n\n  function parseArguments (options, attributes, uniforms, context, env) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    check.optional(function () {\n      var KEY_NAMES = [\n        S_FRAMEBUFFER,\n        S_VERT,\n        S_FRAG,\n        S_ELEMENTS,\n        S_PRIMITIVE,\n        S_OFFSET,\n        S_COUNT,\n        S_INSTANCES,\n        S_PROFILE\n      ].concat(GL_STATE_NAMES)\n\n      function checkKeys (dict) {\n        Object.keys(dict).forEach(function (key) {\n          check.command(\n            KEY_NAMES.indexOf(key) >= 0,\n            'unknown parameter \"' + key + '\"',\n            env.commandStr)\n        })\n      }\n\n      checkKeys(staticOptions)\n      checkKeys(dynamicOptions)\n    })\n\n    var framebuffer = parseFramebuffer(options, env)\n    var viewportAndScissor = parseViewportScissor(options, framebuffer, env)\n    var draw = parseDraw(options, env)\n    var state = parseGLState(options, env)\n    var shader = parseProgram(options, env)\n\n    function copyBox (name) {\n      var defn = viewportAndScissor[name]\n      if (defn) {\n        state[name] = defn\n      }\n    }\n    copyBox(S_VIEWPORT)\n    copyBox(propName(S_SCISSOR_BOX))\n\n    var dirty = Object.keys(state).length > 0\n\n    var result = {\n      framebuffer: framebuffer,\n      draw: draw,\n      shader: shader,\n      state: state,\n      dirty: dirty\n    }\n\n    result.profile = parseProfile(options, env)\n    result.uniforms = parseUniforms(uniforms, env)\n    result.attributes = parseAttributes(attributes, env)\n    result.context = parseContext(context, env)\n    return result\n  }\n\n  // ===================================================\n  // ===================================================\n  // COMMON UPDATE FUNCTIONS\n  // ===================================================\n  // ===================================================\n  function emitContext (env, scope, context) {\n    var shared = env.shared\n    var CONTEXT = shared.context\n\n    var contextEnter = env.scope()\n\n    Object.keys(context).forEach(function (name) {\n      scope.save(CONTEXT, '.' + name)\n      var defn = context[name]\n      contextEnter(CONTEXT, '.', name, '=', defn.append(env, scope), ';')\n    })\n\n    scope(contextEnter)\n  }\n\n  // ===================================================\n  // ===================================================\n  // COMMON DRAWING FUNCTIONS\n  // ===================================================\n  // ===================================================\n  function emitPollFramebuffer (env, scope, framebuffer, skipCheck) {\n    var shared = env.shared\n\n    var GL = shared.gl\n    var FRAMEBUFFER_STATE = shared.framebuffer\n    var EXT_DRAW_BUFFERS\n    if (extDrawBuffers) {\n      EXT_DRAW_BUFFERS = scope.def(shared.extensions, '.webgl_draw_buffers')\n    }\n\n    var constants = env.constants\n\n    var DRAW_BUFFERS = constants.drawBuffer\n    var BACK_BUFFER = constants.backBuffer\n\n    var NEXT\n    if (framebuffer) {\n      NEXT = framebuffer.append(env, scope)\n    } else {\n      NEXT = scope.def(FRAMEBUFFER_STATE, '.next')\n    }\n\n    if (!skipCheck) {\n      scope('if(', NEXT, '!==', FRAMEBUFFER_STATE, '.cur){')\n    }\n    scope(\n      'if(', NEXT, '){',\n      GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',', NEXT, '.framebuffer);')\n    if (extDrawBuffers) {\n      scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(',\n        DRAW_BUFFERS, '[', NEXT, '.colorAttachments.length]);')\n    }\n    scope('}else{',\n      GL, '.bindFramebuffer(', GL_FRAMEBUFFER, ',null);')\n    if (extDrawBuffers) {\n      scope(EXT_DRAW_BUFFERS, '.drawBuffersWEBGL(', BACK_BUFFER, ');')\n    }\n    scope(\n      '}',\n      FRAMEBUFFER_STATE, '.cur=', NEXT, ';')\n    if (!skipCheck) {\n      scope('}')\n    }\n  }\n\n  function emitPollState (env, scope, args) {\n    var shared = env.shared\n\n    var GL = shared.gl\n\n    var CURRENT_VARS = env.current\n    var NEXT_VARS = env.next\n    var CURRENT_STATE = shared.current\n    var NEXT_STATE = shared.next\n\n    var block = env.cond(CURRENT_STATE, '.dirty')\n\n    GL_STATE_NAMES.forEach(function (prop) {\n      var param = propName(prop)\n      if (param in args.state) {\n        return\n      }\n\n      var NEXT, CURRENT\n      if (param in NEXT_VARS) {\n        NEXT = NEXT_VARS[param]\n        CURRENT = CURRENT_VARS[param]\n        var parts = loop(currentState[param].length, function (i) {\n          return block.def(NEXT, '[', i, ']')\n        })\n        block(env.cond(parts.map(function (p, i) {\n          return p + '!==' + CURRENT + '[' + i + ']'\n        }).join('||'))\n          .then(\n            GL, '.', GL_VARIABLES[param], '(', parts, ');',\n            parts.map(function (p, i) {\n              return CURRENT + '[' + i + ']=' + p\n            }).join(';'), ';'))\n      } else {\n        NEXT = block.def(NEXT_STATE, '.', param)\n        var ifte = env.cond(NEXT, '!==', CURRENT_STATE, '.', param)\n        block(ifte)\n        if (param in GL_FLAGS) {\n          ifte(\n            env.cond(NEXT)\n                .then(GL, '.enable(', GL_FLAGS[param], ');')\n                .else(GL, '.disable(', GL_FLAGS[param], ');'),\n            CURRENT_STATE, '.', param, '=', NEXT, ';')\n        } else {\n          ifte(\n            GL, '.', GL_VARIABLES[param], '(', NEXT, ');',\n            CURRENT_STATE, '.', param, '=', NEXT, ';')\n        }\n      }\n    })\n    if (Object.keys(args.state).length === 0) {\n      block(CURRENT_STATE, '.dirty=false;')\n    }\n    scope(block)\n  }\n\n  function emitSetOptions (env, scope, options, filter) {\n    var shared = env.shared\n    var CURRENT_VARS = env.current\n    var CURRENT_STATE = shared.current\n    var GL = shared.gl\n    sortState(Object.keys(options)).forEach(function (param) {\n      var defn = options[param]\n      if (filter && !filter(defn)) {\n        return\n      }\n      var variable = defn.append(env, scope)\n      if (GL_FLAGS[param]) {\n        var flag = GL_FLAGS[param]\n        if (isStatic(defn)) {\n          if (variable) {\n            scope(GL, '.enable(', flag, ');')\n          } else {\n            scope(GL, '.disable(', flag, ');')\n          }\n        } else {\n          scope(env.cond(variable)\n            .then(GL, '.enable(', flag, ');')\n            .else(GL, '.disable(', flag, ');'))\n        }\n        scope(CURRENT_STATE, '.', param, '=', variable, ';')\n      } else if (isArrayLike(variable)) {\n        var CURRENT = CURRENT_VARS[param]\n        scope(\n          GL, '.', GL_VARIABLES[param], '(', variable, ');',\n          variable.map(function (v, i) {\n            return CURRENT + '[' + i + ']=' + v\n          }).join(';'), ';')\n      } else {\n        scope(\n          GL, '.', GL_VARIABLES[param], '(', variable, ');',\n          CURRENT_STATE, '.', param, '=', variable, ';')\n      }\n    })\n  }\n\n  function injectExtensions (env, scope) {\n    if (extInstancing) {\n      env.instancing = scope.def(\n        env.shared.extensions, '.angle_instanced_arrays')\n    }\n  }\n\n  function emitProfile (env, scope, args, useScope, incrementCounter) {\n    var shared = env.shared\n    var STATS = env.stats\n    var CURRENT_STATE = shared.current\n    var TIMER = shared.timer\n    var profileArg = args.profile\n\n    function perfCounter () {\n      if (typeof performance === 'undefined') {\n        return 'Date.now()'\n      } else {\n        return 'performance.now()'\n      }\n    }\n\n    var CPU_START, QUERY_COUNTER\n    function emitProfileStart (block) {\n      CPU_START = scope.def()\n      block(CPU_START, '=', perfCounter(), ';')\n      if (typeof incrementCounter === 'string') {\n        block(STATS, '.count+=', incrementCounter, ';')\n      } else {\n        block(STATS, '.count++;')\n      }\n      if (timer) {\n        if (useScope) {\n          QUERY_COUNTER = scope.def()\n          block(QUERY_COUNTER, '=', TIMER, '.getNumPendingQueries();')\n        } else {\n          block(TIMER, '.beginQuery(', STATS, ');')\n        }\n      }\n    }\n\n    function emitProfileEnd (block) {\n      block(STATS, '.cpuTime+=', perfCounter(), '-', CPU_START, ';')\n      if (timer) {\n        if (useScope) {\n          block(TIMER, '.pushScopeStats(',\n            QUERY_COUNTER, ',',\n            TIMER, '.getNumPendingQueries(),',\n            STATS, ');')\n        } else {\n          block(TIMER, '.endQuery();')\n        }\n      }\n    }\n\n    function scopeProfile (value) {\n      var prev = scope.def(CURRENT_STATE, '.profile')\n      scope(CURRENT_STATE, '.profile=', value, ';')\n      scope.exit(CURRENT_STATE, '.profile=', prev, ';')\n    }\n\n    var USE_PROFILE\n    if (profileArg) {\n      if (isStatic(profileArg)) {\n        if (profileArg.enable) {\n          emitProfileStart(scope)\n          emitProfileEnd(scope.exit)\n          scopeProfile('true')\n        } else {\n          scopeProfile('false')\n        }\n        return\n      }\n      USE_PROFILE = profileArg.append(env, scope)\n      scopeProfile(USE_PROFILE)\n    } else {\n      USE_PROFILE = scope.def(CURRENT_STATE, '.profile')\n    }\n\n    var start = env.block()\n    emitProfileStart(start)\n    scope('if(', USE_PROFILE, '){', start, '}')\n    var end = env.block()\n    emitProfileEnd(end)\n    scope.exit('if(', USE_PROFILE, '){', end, '}')\n  }\n\n  function emitAttributes (env, scope, args, attributes, filter) {\n    var shared = env.shared\n\n    function typeLength (x) {\n      switch (x) {\n        case GL_FLOAT_VEC2:\n        case GL_INT_VEC2:\n        case GL_BOOL_VEC2:\n          return 2\n        case GL_FLOAT_VEC3:\n        case GL_INT_VEC3:\n        case GL_BOOL_VEC3:\n          return 3\n        case GL_FLOAT_VEC4:\n        case GL_INT_VEC4:\n        case GL_BOOL_VEC4:\n          return 4\n        default:\n          return 1\n      }\n    }\n\n    function emitBindAttribute (ATTRIBUTE, size, record) {\n      var GL = shared.gl\n\n      var LOCATION = scope.def(ATTRIBUTE, '.location')\n      var BINDING = scope.def(shared.attributes, '[', LOCATION, ']')\n\n      var STATE = record.state\n      var BUFFER = record.buffer\n      var CONST_COMPONENTS = [\n        record.x,\n        record.y,\n        record.z,\n        record.w\n      ]\n\n      var COMMON_KEYS = [\n        'buffer',\n        'normalized',\n        'offset',\n        'stride'\n      ]\n\n      function emitBuffer () {\n        scope(\n          'if(!', BINDING, '.buffer){',\n          GL, '.enableVertexAttribArray(', LOCATION, ');}')\n\n        var TYPE = record.type\n        var SIZE\n        if (!record.size) {\n          SIZE = size\n        } else {\n          SIZE = scope.def(record.size, '||', size)\n        }\n\n        scope('if(',\n          BINDING, '.type!==', TYPE, '||',\n          BINDING, '.size!==', SIZE, '||',\n          COMMON_KEYS.map(function (key) {\n            return BINDING + '.' + key + '!==' + record[key]\n          }).join('||'),\n          '){',\n          GL, '.bindBuffer(', GL_ARRAY_BUFFER, ',', BUFFER, '.buffer);',\n          GL, '.vertexAttribPointer(', [\n            LOCATION,\n            SIZE,\n            TYPE,\n            record.normalized,\n            record.stride,\n            record.offset\n          ], ');',\n          BINDING, '.type=', TYPE, ';',\n          BINDING, '.size=', SIZE, ';',\n          COMMON_KEYS.map(function (key) {\n            return BINDING + '.' + key + '=' + record[key] + ';'\n          }).join(''),\n          '}')\n\n        if (extInstancing) {\n          var DIVISOR = record.divisor\n          scope(\n            'if(', BINDING, '.divisor!==', DIVISOR, '){',\n            env.instancing, '.vertexAttribDivisorANGLE(', [LOCATION, DIVISOR], ');',\n            BINDING, '.divisor=', DIVISOR, ';}')\n        }\n      }\n\n      function emitConstant () {\n        scope(\n          'if(', BINDING, '.buffer){',\n          GL, '.disableVertexAttribArray(', LOCATION, ');',\n          '}if(', CUTE_COMPONENTS.map(function (c, i) {\n            return BINDING + '.' + c + '!==' + CONST_COMPONENTS[i]\n          }).join('||'), '){',\n          GL, '.vertexAttrib4f(', LOCATION, ',', CONST_COMPONENTS, ');',\n          CUTE_COMPONENTS.map(function (c, i) {\n            return BINDING + '.' + c + '=' + CONST_COMPONENTS[i] + ';'\n          }).join(''),\n          '}')\n      }\n\n      if (STATE === ATTRIB_STATE_POINTER) {\n        emitBuffer()\n      } else if (STATE === ATTRIB_STATE_CONSTANT) {\n        emitConstant()\n      } else {\n        scope('if(', STATE, '===', ATTRIB_STATE_POINTER, '){')\n        emitBuffer()\n        scope('}else{')\n        emitConstant()\n        scope('}')\n      }\n    }\n\n    attributes.forEach(function (attribute) {\n      var name = attribute.name\n      var arg = args.attributes[name]\n      var record\n      if (arg) {\n        if (!filter(arg)) {\n          return\n        }\n        record = arg.append(env, scope)\n      } else {\n        if (!filter(SCOPE_DECL)) {\n          return\n        }\n        var scopeAttrib = env.scopeAttrib(name)\n        check.optional(function () {\n          env.assert(scope,\n            scopeAttrib + '.state',\n            'missing attribute ' + name)\n        })\n        record = {}\n        Object.keys(new AttributeRecord()).forEach(function (key) {\n          record[key] = scope.def(scopeAttrib, '.', key)\n        })\n      }\n      emitBindAttribute(\n        env.link(attribute), typeLength(attribute.info.type), record)\n    })\n  }\n\n  function emitUniforms (env, scope, args, uniforms, filter) {\n    var shared = env.shared\n    var GL = shared.gl\n\n    var infix\n    for (var i = 0; i < uniforms.length; ++i) {\n      var uniform = uniforms[i]\n      var name = uniform.name\n      var type = uniform.info.type\n      var arg = args.uniforms[name]\n      var UNIFORM = env.link(uniform)\n      var LOCATION = UNIFORM + '.location'\n\n      var VALUE\n      if (arg) {\n        if (!filter(arg)) {\n          continue\n        }\n        if (isStatic(arg)) {\n          var value = arg.value\n          check.command(\n            value !== null && typeof value !== 'undefined',\n            'missing uniform \"' + name + '\"', env.commandStr)\n          if (type === GL_SAMPLER_2D || type === GL_SAMPLER_CUBE) {\n            check.command(\n              typeof value === 'function' &&\n              ((type === GL_SAMPLER_2D &&\n                (value._reglType === 'texture2d' ||\n                value._reglType === 'framebuffer')) ||\n              (type === GL_SAMPLER_CUBE &&\n                (value._reglType === 'textureCube' ||\n                value._reglType === 'framebufferCube'))),\n              'invalid texture for uniform ' + name, env.commandStr)\n            var TEX_VALUE = env.link(value._texture || value.color[0]._texture)\n            scope(GL, '.uniform1i(', LOCATION, ',', TEX_VALUE + '.bind());')\n            scope.exit(TEX_VALUE, '.unbind();')\n          } else if (\n            type === GL_FLOAT_MAT2 ||\n            type === GL_FLOAT_MAT3 ||\n            type === GL_FLOAT_MAT4) {\n            check.optional(function () {\n              check.command(isArrayLike(value),\n                'invalid matrix for uniform ' + name, env.commandStr)\n              check.command(\n                (type === GL_FLOAT_MAT2 && value.length === 4) ||\n                (type === GL_FLOAT_MAT3 && value.length === 9) ||\n                (type === GL_FLOAT_MAT4 && value.length === 16),\n                'invalid length for matrix uniform ' + name, env.commandStr)\n            })\n            var MAT_VALUE = env.global.def('new Float32Array([' +\n              Array.prototype.slice.call(value) + '])')\n            var dim = 2\n            if (type === GL_FLOAT_MAT3) {\n              dim = 3\n            } else if (type === GL_FLOAT_MAT4) {\n              dim = 4\n            }\n            scope(\n              GL, '.uniformMatrix', dim, 'fv(',\n              LOCATION, ',false,', MAT_VALUE, ');')\n          } else {\n            switch (type) {\n              case GL_FLOAT:\n                check.commandType(value, 'number', 'uniform ' + name, env.commandStr)\n                infix = '1f'\n                break\n              case GL_FLOAT_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2f'\n                break\n              case GL_FLOAT_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3f'\n                break\n              case GL_FLOAT_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4f'\n                break\n              case GL_BOOL:\n                check.commandType(value, 'boolean', 'uniform ' + name, env.commandStr)\n                infix = '1i'\n                break\n              case GL_INT:\n                check.commandType(value, 'number', 'uniform ' + name, env.commandStr)\n                infix = '1i'\n                break\n              case GL_BOOL_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2i'\n                break\n              case GL_INT_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name, env.commandStr)\n                infix = '2i'\n                break\n              case GL_BOOL_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3i'\n                break\n              case GL_INT_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name, env.commandStr)\n                infix = '3i'\n                break\n              case GL_BOOL_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4i'\n                break\n              case GL_INT_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name, env.commandStr)\n                infix = '4i'\n                break\n            }\n            scope(GL, '.uniform', infix, '(', LOCATION, ',',\n              isArrayLike(value) ? Array.prototype.slice.call(value) : value,\n              ');')\n          }\n          continue\n        } else {\n          VALUE = arg.append(env, scope)\n        }\n      } else {\n        if (!filter(SCOPE_DECL)) {\n          continue\n        }\n        VALUE = scope.def(shared.uniforms, '[', stringStore.id(name), ']')\n      }\n\n      if (type === GL_SAMPLER_2D) {\n        scope(\n          'if(', VALUE, '&&', VALUE, '._reglType===\"framebuffer\"){',\n          VALUE, '=', VALUE, '.color[0];',\n          '}')\n      } else if (type === GL_SAMPLER_CUBE) {\n        scope(\n          'if(', VALUE, '&&', VALUE, '._reglType===\"framebufferCube\"){',\n          VALUE, '=', VALUE, '.color[0];',\n          '}')\n      }\n\n      // perform type validation\n      check.optional(function () {\n        function check (pred, message) {\n          env.assert(scope, pred,\n            'bad data or missing for uniform \"' + name + '\".  ' + message)\n        }\n\n        function checkType (type) {\n          check(\n            'typeof ' + VALUE + '===\"' + type + '\"',\n            'invalid type, expected ' + type)\n        }\n\n        function checkVector (n, type) {\n          check(\n            shared.isArrayLike + '(' + VALUE + ')&&' + VALUE + '.length===' + n,\n            'invalid vector, should have length ' + n, env.commandStr)\n        }\n\n        function checkTexture (target) {\n          check(\n            'typeof ' + VALUE + '===\"function\"&&' +\n            VALUE + '._reglType===\"texture' +\n            (target === GL_TEXTURE_2D ? '2d' : 'Cube') + '\"',\n            'invalid texture type', env.commandStr)\n        }\n\n        switch (type) {\n          case GL_INT:\n            checkType('number')\n            break\n          case GL_INT_VEC2:\n            checkVector(2, 'number')\n            break\n          case GL_INT_VEC3:\n            checkVector(3, 'number')\n            break\n          case GL_INT_VEC4:\n            checkVector(4, 'number')\n            break\n          case GL_FLOAT:\n            checkType('number')\n            break\n          case GL_FLOAT_VEC2:\n            checkVector(2, 'number')\n            break\n          case GL_FLOAT_VEC3:\n            checkVector(3, 'number')\n            break\n          case GL_FLOAT_VEC4:\n            checkVector(4, 'number')\n            break\n          case GL_BOOL:\n            checkType('boolean')\n            break\n          case GL_BOOL_VEC2:\n            checkVector(2, 'boolean')\n            break\n          case GL_BOOL_VEC3:\n            checkVector(3, 'boolean')\n            break\n          case GL_BOOL_VEC4:\n            checkVector(4, 'boolean')\n            break\n          case GL_FLOAT_MAT2:\n            checkVector(4, 'number')\n            break\n          case GL_FLOAT_MAT3:\n            checkVector(9, 'number')\n            break\n          case GL_FLOAT_MAT4:\n            checkVector(16, 'number')\n            break\n          case GL_SAMPLER_2D:\n            checkTexture(GL_TEXTURE_2D)\n            break\n          case GL_SAMPLER_CUBE:\n            checkTexture(GL_TEXTURE_CUBE_MAP)\n            break\n        }\n      })\n\n      var unroll = 1\n      switch (type) {\n        case GL_SAMPLER_2D:\n        case GL_SAMPLER_CUBE:\n          var TEX = scope.def(VALUE, '._texture')\n          scope(GL, '.uniform1i(', LOCATION, ',', TEX, '.bind());')\n          scope.exit(TEX, '.unbind();')\n          continue\n\n        case GL_INT:\n        case GL_BOOL:\n          infix = '1i'\n          break\n\n        case GL_INT_VEC2:\n        case GL_BOOL_VEC2:\n          infix = '2i'\n          unroll = 2\n          break\n\n        case GL_INT_VEC3:\n        case GL_BOOL_VEC3:\n          infix = '3i'\n          unroll = 3\n          break\n\n        case GL_INT_VEC4:\n        case GL_BOOL_VEC4:\n          infix = '4i'\n          unroll = 4\n          break\n\n        case GL_FLOAT:\n          infix = '1f'\n          break\n\n        case GL_FLOAT_VEC2:\n          infix = '2f'\n          unroll = 2\n          break\n\n        case GL_FLOAT_VEC3:\n          infix = '3f'\n          unroll = 3\n          break\n\n        case GL_FLOAT_VEC4:\n          infix = '4f'\n          unroll = 4\n          break\n\n        case GL_FLOAT_MAT2:\n          infix = 'Matrix2fv'\n          break\n\n        case GL_FLOAT_MAT3:\n          infix = 'Matrix3fv'\n          break\n\n        case GL_FLOAT_MAT4:\n          infix = 'Matrix4fv'\n          break\n      }\n\n      scope(GL, '.uniform', infix, '(', LOCATION, ',')\n      if (infix.charAt(0) === 'M') {\n        var matSize = Math.pow(type - GL_FLOAT_MAT2 + 2, 2)\n        var STORAGE = env.global.def('new Float32Array(', matSize, ')')\n        scope(\n          'false,(Array.isArray(', VALUE, ')||', VALUE, ' instanceof Float32Array)?', VALUE, ':(',\n          loop(matSize, function (i) {\n            return STORAGE + '[' + i + ']=' + VALUE + '[' + i + ']'\n          }), ',', STORAGE, ')')\n      } else if (unroll > 1) {\n        scope(loop(unroll, function (i) {\n          return VALUE + '[' + i + ']'\n        }))\n      } else {\n        scope(VALUE)\n      }\n      scope(');')\n    }\n  }\n\n  function emitDraw (env, outer, inner, args) {\n    var shared = env.shared\n    var GL = shared.gl\n    var DRAW_STATE = shared.draw\n\n    var drawOptions = args.draw\n\n    function emitElements () {\n      var defn = drawOptions.elements\n      var ELEMENTS\n      var scope = outer\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          scope = inner\n        }\n        ELEMENTS = defn.append(env, scope)\n      } else {\n        ELEMENTS = scope.def(DRAW_STATE, '.', S_ELEMENTS)\n      }\n      if (ELEMENTS) {\n        scope(\n          'if(' + ELEMENTS + ')' +\n          GL + '.bindBuffer(' + GL_ELEMENT_ARRAY_BUFFER + ',' + ELEMENTS + '.buffer.buffer);')\n      }\n      return ELEMENTS\n    }\n\n    function emitCount () {\n      var defn = drawOptions.count\n      var COUNT\n      var scope = outer\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          scope = inner\n        }\n        COUNT = defn.append(env, scope)\n        check.optional(function () {\n          if (defn.MISSING) {\n            env.assert(outer, 'false', 'missing vertex count')\n          }\n          if (defn.DYNAMIC) {\n            env.assert(scope, COUNT + '>=0', 'missing vertex count')\n          }\n        })\n      } else {\n        COUNT = scope.def(DRAW_STATE, '.', S_COUNT)\n        check.optional(function () {\n          env.assert(scope, COUNT + '>=0', 'missing vertex count')\n        })\n      }\n      return COUNT\n    }\n\n    var ELEMENTS = emitElements()\n    function emitValue (name) {\n      var defn = drawOptions[name]\n      if (defn) {\n        if ((defn.contextDep && args.contextDynamic) || defn.propDep) {\n          return defn.append(env, inner)\n        } else {\n          return defn.append(env, outer)\n        }\n      } else {\n        return outer.def(DRAW_STATE, '.', name)\n      }\n    }\n\n    var PRIMITIVE = emitValue(S_PRIMITIVE)\n    var OFFSET = emitValue(S_OFFSET)\n\n    var COUNT = emitCount()\n    if (typeof COUNT === 'number') {\n      if (COUNT === 0) {\n        return\n      }\n    } else {\n      inner('if(', COUNT, '){')\n      inner.exit('}')\n    }\n\n    var INSTANCES, EXT_INSTANCING\n    if (extInstancing) {\n      INSTANCES = emitValue(S_INSTANCES)\n      EXT_INSTANCING = env.instancing\n    }\n\n    var ELEMENT_TYPE = ELEMENTS + '.type'\n\n    var elementsStatic = drawOptions.elements && isStatic(drawOptions.elements)\n\n    function emitInstancing () {\n      function drawElements () {\n        inner(EXT_INSTANCING, '.drawElementsInstancedANGLE(', [\n          PRIMITIVE,\n          COUNT,\n          ELEMENT_TYPE,\n          OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)',\n          INSTANCES\n        ], ');')\n      }\n\n      function drawArrays () {\n        inner(EXT_INSTANCING, '.drawArraysInstancedANGLE(',\n          [PRIMITIVE, OFFSET, COUNT, INSTANCES], ');')\n      }\n\n      if (ELEMENTS) {\n        if (!elementsStatic) {\n          inner('if(', ELEMENTS, '){')\n          drawElements()\n          inner('}else{')\n          drawArrays()\n          inner('}')\n        } else {\n          drawElements()\n        }\n      } else {\n        drawArrays()\n      }\n    }\n\n    function emitRegular () {\n      function drawElements () {\n        inner(GL + '.drawElements(' + [\n          PRIMITIVE,\n          COUNT,\n          ELEMENT_TYPE,\n          OFFSET + '<<((' + ELEMENT_TYPE + '-' + GL_UNSIGNED_BYTE + ')>>1)'\n        ] + ');')\n      }\n\n      function drawArrays () {\n        inner(GL + '.drawArrays(' + [PRIMITIVE, OFFSET, COUNT] + ');')\n      }\n\n      if (ELEMENTS) {\n        if (!elementsStatic) {\n          inner('if(', ELEMENTS, '){')\n          drawElements()\n          inner('}else{')\n          drawArrays()\n          inner('}')\n        } else {\n          drawElements()\n        }\n      } else {\n        drawArrays()\n      }\n    }\n\n    if (extInstancing && (typeof INSTANCES !== 'number' || INSTANCES >= 0)) {\n      if (typeof INSTANCES === 'string') {\n        inner('if(', INSTANCES, '>0){')\n        emitInstancing()\n        inner('}else if(', INSTANCES, '<0){')\n        emitRegular()\n        inner('}')\n      } else {\n        emitInstancing()\n      }\n    } else {\n      emitRegular()\n    }\n  }\n\n  function createBody (emitBody, parentEnv, args, program, count) {\n    var env = createREGLEnvironment()\n    var scope = env.proc('body', count)\n    check.optional(function () {\n      env.commandStr = parentEnv.commandStr\n      env.command = env.link(parentEnv.commandStr)\n    })\n    if (extInstancing) {\n      env.instancing = scope.def(\n        env.shared.extensions, '.angle_instanced_arrays')\n    }\n    emitBody(env, scope, args, program)\n    return env.compile().body\n  }\n\n  // ===================================================\n  // ===================================================\n  // DRAW PROC\n  // ===================================================\n  // ===================================================\n  function emitDrawBody (env, draw, args, program) {\n    injectExtensions(env, draw)\n    emitAttributes(env, draw, args, program.attributes, function () {\n      return true\n    })\n    emitUniforms(env, draw, args, program.uniforms, function () {\n      return true\n    })\n    emitDraw(env, draw, draw, args)\n  }\n\n  function emitDrawProc (env, args) {\n    var draw = env.proc('draw', 1)\n\n    injectExtensions(env, draw)\n\n    emitContext(env, draw, args.context)\n    emitPollFramebuffer(env, draw, args.framebuffer)\n\n    emitPollState(env, draw, args)\n    emitSetOptions(env, draw, args.state)\n\n    emitProfile(env, draw, args, false, true)\n\n    var program = args.shader.progVar.append(env, draw)\n    draw(env.shared.gl, '.useProgram(', program, '.program);')\n\n    if (args.shader.program) {\n      emitDrawBody(env, draw, args, args.shader.program)\n    } else {\n      var drawCache = env.global.def('{}')\n      var PROG_ID = draw.def(program, '.id')\n      var CACHED_PROC = draw.def(drawCache, '[', PROG_ID, ']')\n      draw(\n        env.cond(CACHED_PROC)\n          .then(CACHED_PROC, '.call(this,a0);')\n          .else(\n            CACHED_PROC, '=', drawCache, '[', PROG_ID, ']=',\n            env.link(function (program) {\n              return createBody(emitDrawBody, env, args, program, 1)\n            }), '(', program, ');',\n            CACHED_PROC, '.call(this,a0);'))\n    }\n\n    if (Object.keys(args.state).length > 0) {\n      draw(env.shared.current, '.dirty=true;')\n    }\n  }\n\n  // ===================================================\n  // ===================================================\n  // BATCH PROC\n  // ===================================================\n  // ===================================================\n\n  function emitBatchDynamicShaderBody (env, scope, args, program) {\n    env.batchId = 'a1'\n\n    injectExtensions(env, scope)\n\n    function all () {\n      return true\n    }\n\n    emitAttributes(env, scope, args, program.attributes, all)\n    emitUniforms(env, scope, args, program.uniforms, all)\n    emitDraw(env, scope, scope, args)\n  }\n\n  function emitBatchBody (env, scope, args, program) {\n    injectExtensions(env, scope)\n\n    var contextDynamic = args.contextDep\n\n    var BATCH_ID = scope.def()\n    var PROP_LIST = 'a0'\n    var NUM_PROPS = 'a1'\n    var PROPS = scope.def()\n    env.shared.props = PROPS\n    env.batchId = BATCH_ID\n\n    var outer = env.scope()\n    var inner = env.scope()\n\n    scope(\n      outer.entry,\n      'for(', BATCH_ID, '=0;', BATCH_ID, '<', NUM_PROPS, ';++', BATCH_ID, '){',\n      PROPS, '=', PROP_LIST, '[', BATCH_ID, '];',\n      inner,\n      '}',\n      outer.exit)\n\n    function isInnerDefn (defn) {\n      return ((defn.contextDep && contextDynamic) || defn.propDep)\n    }\n\n    function isOuterDefn (defn) {\n      return !isInnerDefn(defn)\n    }\n\n    if (args.needsContext) {\n      emitContext(env, inner, args.context)\n    }\n    if (args.needsFramebuffer) {\n      emitPollFramebuffer(env, inner, args.framebuffer)\n    }\n    emitSetOptions(env, inner, args.state, isInnerDefn)\n\n    if (args.profile && isInnerDefn(args.profile)) {\n      emitProfile(env, inner, args, false, true)\n    }\n\n    if (!program) {\n      var progCache = env.global.def('{}')\n      var PROGRAM = args.shader.progVar.append(env, inner)\n      var PROG_ID = inner.def(PROGRAM, '.id')\n      var CACHED_PROC = inner.def(progCache, '[', PROG_ID, ']')\n      inner(\n        env.shared.gl, '.useProgram(', PROGRAM, '.program);',\n        'if(!', CACHED_PROC, '){',\n        CACHED_PROC, '=', progCache, '[', PROG_ID, ']=',\n        env.link(function (program) {\n          return createBody(\n            emitBatchDynamicShaderBody, env, args, program, 2)\n        }), '(', PROGRAM, ');}',\n        CACHED_PROC, '.call(this,a0[', BATCH_ID, '],', BATCH_ID, ');')\n    } else {\n      emitAttributes(env, outer, args, program.attributes, isOuterDefn)\n      emitAttributes(env, inner, args, program.attributes, isInnerDefn)\n      emitUniforms(env, outer, args, program.uniforms, isOuterDefn)\n      emitUniforms(env, inner, args, program.uniforms, isInnerDefn)\n      emitDraw(env, outer, inner, args)\n    }\n  }\n\n  function emitBatchProc (env, args) {\n    var batch = env.proc('batch', 2)\n    env.batchId = '0'\n\n    injectExtensions(env, batch)\n\n    // Check if any context variables depend on props\n    var contextDynamic = false\n    var needsContext = true\n    Object.keys(args.context).forEach(function (name) {\n      contextDynamic = contextDynamic || args.context[name].propDep\n    })\n    if (!contextDynamic) {\n      emitContext(env, batch, args.context)\n      needsContext = false\n    }\n\n    // framebuffer state affects framebufferWidth/height context vars\n    var framebuffer = args.framebuffer\n    var needsFramebuffer = false\n    if (framebuffer) {\n      if (framebuffer.propDep) {\n        contextDynamic = needsFramebuffer = true\n      } else if (framebuffer.contextDep && contextDynamic) {\n        needsFramebuffer = true\n      }\n      if (!needsFramebuffer) {\n        emitPollFramebuffer(env, batch, framebuffer)\n      }\n    } else {\n      emitPollFramebuffer(env, batch, null)\n    }\n\n    // viewport is weird because it can affect context vars\n    if (args.state.viewport && args.state.viewport.propDep) {\n      contextDynamic = true\n    }\n\n    function isInnerDefn (defn) {\n      return (defn.contextDep && contextDynamic) || defn.propDep\n    }\n\n    // set webgl options\n    emitPollState(env, batch, args)\n    emitSetOptions(env, batch, args.state, function (defn) {\n      return !isInnerDefn(defn)\n    })\n\n    if (!args.profile || !isInnerDefn(args.profile)) {\n      emitProfile(env, batch, args, false, 'a1')\n    }\n\n    // Save these values to args so that the batch body routine can use them\n    args.contextDep = contextDynamic\n    args.needsContext = needsContext\n    args.needsFramebuffer = needsFramebuffer\n\n    // determine if shader is dynamic\n    var progDefn = args.shader.progVar\n    if ((progDefn.contextDep && contextDynamic) || progDefn.propDep) {\n      emitBatchBody(\n        env,\n        batch,\n        args,\n        null)\n    } else {\n      var PROGRAM = progDefn.append(env, batch)\n      batch(env.shared.gl, '.useProgram(', PROGRAM, '.program);')\n      if (args.shader.program) {\n        emitBatchBody(\n          env,\n          batch,\n          args,\n          args.shader.program)\n      } else {\n        var batchCache = env.global.def('{}')\n        var PROG_ID = batch.def(PROGRAM, '.id')\n        var CACHED_PROC = batch.def(batchCache, '[', PROG_ID, ']')\n        batch(\n          env.cond(CACHED_PROC)\n            .then(CACHED_PROC, '.call(this,a0,a1);')\n            .else(\n              CACHED_PROC, '=', batchCache, '[', PROG_ID, ']=',\n              env.link(function (program) {\n                return createBody(emitBatchBody, env, args, program, 2)\n              }), '(', PROGRAM, ');',\n              CACHED_PROC, '.call(this,a0,a1);'))\n      }\n    }\n\n    if (Object.keys(args.state).length > 0) {\n      batch(env.shared.current, '.dirty=true;')\n    }\n  }\n\n  // ===================================================\n  // ===================================================\n  // SCOPE COMMAND\n  // ===================================================\n  // ===================================================\n  function emitScopeProc (env, args) {\n    var scope = env.proc('scope', 3)\n    env.batchId = 'a2'\n\n    var shared = env.shared\n    var CURRENT_STATE = shared.current\n\n    emitContext(env, scope, args.context)\n\n    if (args.framebuffer) {\n      args.framebuffer.append(env, scope)\n    }\n\n    sortState(Object.keys(args.state)).forEach(function (name) {\n      var defn = args.state[name]\n      var value = defn.append(env, scope)\n      if (isArrayLike(value)) {\n        value.forEach(function (v, i) {\n          scope.set(env.next[name], '[' + i + ']', v)\n        })\n      } else {\n        scope.set(shared.next, '.' + name, value)\n      }\n    })\n\n    emitProfile(env, scope, args, true, true)\n\n    ;[S_ELEMENTS, S_OFFSET, S_COUNT, S_INSTANCES, S_PRIMITIVE].forEach(\n      function (opt) {\n        var variable = args.draw[opt]\n        if (!variable) {\n          return\n        }\n        scope.set(shared.draw, '.' + opt, '' + variable.append(env, scope))\n      })\n\n    Object.keys(args.uniforms).forEach(function (opt) {\n      scope.set(\n        shared.uniforms,\n        '[' + stringStore.id(opt) + ']',\n        args.uniforms[opt].append(env, scope))\n    })\n\n    Object.keys(args.attributes).forEach(function (name) {\n      var record = args.attributes[name].append(env, scope)\n      var scopeAttrib = env.scopeAttrib(name)\n      Object.keys(new AttributeRecord()).forEach(function (prop) {\n        scope.set(scopeAttrib, '.' + prop, record[prop])\n      })\n    })\n\n    function saveShader (name) {\n      var shader = args.shader[name]\n      if (shader) {\n        scope.set(shared.shader, '.' + name, shader.append(env, scope))\n      }\n    }\n    saveShader(S_VERT)\n    saveShader(S_FRAG)\n\n    if (Object.keys(args.state).length > 0) {\n      scope(CURRENT_STATE, '.dirty=true;')\n      scope.exit(CURRENT_STATE, '.dirty=true;')\n    }\n\n    scope('a1(', env.shared.context, ',a0,', env.batchId, ');')\n  }\n\n  function isDynamicObject (object) {\n    if (typeof object !== 'object' || isArrayLike(object)) {\n      return\n    }\n    var props = Object.keys(object)\n    for (var i = 0; i < props.length; ++i) {\n      if (dynamic.isDynamic(object[props[i]])) {\n        return true\n      }\n    }\n    return false\n  }\n\n  function splatObject (env, options, name) {\n    var object = options.static[name]\n    if (!object || !isDynamicObject(object)) {\n      return\n    }\n\n    var globals = env.global\n    var keys = Object.keys(object)\n    var thisDep = false\n    var contextDep = false\n    var propDep = false\n    var objectRef = env.global.def('{}')\n    keys.forEach(function (key) {\n      var value = object[key]\n      if (dynamic.isDynamic(value)) {\n        if (typeof value === 'function') {\n          value = object[key] = dynamic.unbox(value)\n        }\n        var deps = createDynamicDecl(value, null)\n        thisDep = thisDep || deps.thisDep\n        propDep = propDep || deps.propDep\n        contextDep = contextDep || deps.contextDep\n      } else {\n        globals(objectRef, '.', key, '=')\n        switch (typeof value) {\n          case 'number':\n            globals(value)\n            break\n          case 'string':\n            globals('\"', value, '\"')\n            break\n          case 'object':\n            if (Array.isArray(value)) {\n              globals('[', value.join(), ']')\n            }\n            break\n          default:\n            globals(env.link(value))\n            break\n        }\n        globals(';')\n      }\n    })\n\n    function appendBlock (env, block) {\n      keys.forEach(function (key) {\n        var value = object[key]\n        if (!dynamic.isDynamic(value)) {\n          return\n        }\n        var ref = env.invoke(block, value)\n        block(objectRef, '.', key, '=', ref, ';')\n      })\n    }\n\n    options.dynamic[name] = new dynamic.DynamicVariable(DYN_THUNK, {\n      thisDep: thisDep,\n      contextDep: contextDep,\n      propDep: propDep,\n      ref: objectRef,\n      append: appendBlock\n    })\n    delete options.static[name]\n  }\n\n  // ===========================================================================\n  // ===========================================================================\n  // MAIN DRAW COMMAND\n  // ===========================================================================\n  // ===========================================================================\n  function compileCommand (options, attributes, uniforms, context, stats) {\n    var env = createREGLEnvironment()\n\n    // link stats, so that we can easily access it in the program.\n    env.stats = env.link(stats)\n\n    // splat options and attributes to allow for dynamic nested properties\n    Object.keys(attributes.static).forEach(function (key) {\n      splatObject(env, attributes, key)\n    })\n    NESTED_OPTIONS.forEach(function (name) {\n      splatObject(env, options, name)\n    })\n\n    var args = parseArguments(options, attributes, uniforms, context, env)\n\n    emitDrawProc(env, args)\n    emitScopeProc(env, args)\n    emitBatchProc(env, args)\n\n    return env.compile()\n  }\n\n  // ===========================================================================\n  // ===========================================================================\n  // POLL / REFRESH\n  // ===========================================================================\n  // ===========================================================================\n  return {\n    next: nextState,\n    current: currentState,\n    procs: (function () {\n      var env = createREGLEnvironment()\n      var poll = env.proc('poll')\n      var refresh = env.proc('refresh')\n      var common = env.block()\n      poll(common)\n      refresh(common)\n\n      var shared = env.shared\n      var GL = shared.gl\n      var NEXT_STATE = shared.next\n      var CURRENT_STATE = shared.current\n\n      common(CURRENT_STATE, '.dirty=false;')\n\n      emitPollFramebuffer(env, poll)\n      emitPollFramebuffer(env, refresh, null, true)\n\n      // Refresh updates all attribute state changes\n      var extInstancing = gl.getExtension('angle_instanced_arrays')\n      var INSTANCING\n      if (extInstancing) {\n        INSTANCING = env.link(extInstancing)\n      }\n      for (var i = 0; i < limits.maxAttributes; ++i) {\n        var BINDING = refresh.def(shared.attributes, '[', i, ']')\n        var ifte = env.cond(BINDING, '.buffer')\n        ifte.then(\n          GL, '.enableVertexAttribArray(', i, ');',\n          GL, '.bindBuffer(',\n            GL_ARRAY_BUFFER, ',',\n            BINDING, '.buffer.buffer);',\n          GL, '.vertexAttribPointer(',\n            i, ',',\n            BINDING, '.size,',\n            BINDING, '.type,',\n            BINDING, '.normalized,',\n            BINDING, '.stride,',\n            BINDING, '.offset);'\n        ).else(\n          GL, '.disableVertexAttribArray(', i, ');',\n          GL, '.vertexAttrib4f(',\n            i, ',',\n            BINDING, '.x,',\n            BINDING, '.y,',\n            BINDING, '.z,',\n            BINDING, '.w);',\n          BINDING, '.buffer=null;')\n        refresh(ifte)\n        if (extInstancing) {\n          refresh(\n            INSTANCING, '.vertexAttribDivisorANGLE(',\n            i, ',',\n            BINDING, '.divisor);')\n        }\n      }\n\n      Object.keys(GL_FLAGS).forEach(function (flag) {\n        var cap = GL_FLAGS[flag]\n        var NEXT = common.def(NEXT_STATE, '.', flag)\n        var block = env.block()\n        block('if(', NEXT, '){',\n          GL, '.enable(', cap, ')}else{',\n          GL, '.disable(', cap, ')}',\n          CURRENT_STATE, '.', flag, '=', NEXT, ';')\n        refresh(block)\n        poll(\n          'if(', NEXT, '!==', CURRENT_STATE, '.', flag, '){',\n          block,\n          '}')\n      })\n\n      Object.keys(GL_VARIABLES).forEach(function (name) {\n        var func = GL_VARIABLES[name]\n        var init = currentState[name]\n        var NEXT, CURRENT\n        var block = env.block()\n        block(GL, '.', func, '(')\n        if (isArrayLike(init)) {\n          var n = init.length\n          NEXT = env.global.def(NEXT_STATE, '.', name)\n          CURRENT = env.global.def(CURRENT_STATE, '.', name)\n          block(\n            loop(n, function (i) {\n              return NEXT + '[' + i + ']'\n            }), ');',\n            loop(n, function (i) {\n              return CURRENT + '[' + i + ']=' + NEXT + '[' + i + '];'\n            }).join(''))\n          poll(\n            'if(', loop(n, function (i) {\n              return NEXT + '[' + i + ']!==' + CURRENT + '[' + i + ']'\n            }).join('||'), '){',\n            block,\n            '}')\n        } else {\n          NEXT = common.def(NEXT_STATE, '.', name)\n          CURRENT = common.def(CURRENT_STATE, '.', name)\n          block(\n            NEXT, ');',\n            CURRENT_STATE, '.', name, '=', NEXT, ';')\n          poll(\n            'if(', NEXT, '!==', CURRENT, '){',\n            block,\n            '}')\n        }\n        refresh(block)\n      })\n\n      return env.compile()\n    })(),\n    compile: compileCommand\n  }\n}\n","var VARIABLE_COUNTER = 0\n\nvar DYN_FUNC = 0\n\nfunction DynamicVariable (type, data) {\n  this.id = (VARIABLE_COUNTER++)\n  this.type = type\n  this.data = data\n}\n\nfunction escapeStr (str) {\n  return str.replace(/\\\\/g, '\\\\\\\\').replace(/\"/g, '\\\\\"')\n}\n\nfunction splitParts (str) {\n  if (str.length === 0) {\n    return []\n  }\n\n  var firstChar = str.charAt(0)\n  var lastChar = str.charAt(str.length - 1)\n\n  if (str.length > 1 &&\n      firstChar === lastChar &&\n      (firstChar === '\"' || firstChar === \"'\")) {\n    return ['\"' + escapeStr(str.substr(1, str.length - 2)) + '\"']\n  }\n\n  var parts = /\\[(false|true|null|\\d+|'[^']*'|\"[^\"]*\")\\]/.exec(str)\n  if (parts) {\n    return (\n      splitParts(str.substr(0, parts.index))\n      .concat(splitParts(parts[1]))\n      .concat(splitParts(str.substr(parts.index + parts[0].length)))\n    )\n  }\n\n  var subparts = str.split('.')\n  if (subparts.length === 1) {\n    return ['\"' + escapeStr(str) + '\"']\n  }\n\n  var result = []\n  for (var i = 0; i < subparts.length; ++i) {\n    result = result.concat(splitParts(subparts[i]))\n  }\n  return result\n}\n\nfunction toAccessorString (str) {\n  return '[' + splitParts(str).join('][') + ']'\n}\n\nfunction defineDynamic (type, data) {\n  return new DynamicVariable(type, toAccessorString(data + ''))\n}\n\nfunction isDynamic (x) {\n  return (typeof x === 'function' && !x._reglType) ||\n         x instanceof DynamicVariable\n}\n\nfunction unbox (x, path) {\n  if (typeof x === 'function') {\n    return new DynamicVariable(DYN_FUNC, x)\n  }\n  return x\n}\n\nmodule.exports = {\n  DynamicVariable: DynamicVariable,\n  define: defineDynamic,\n  isDynamic: isDynamic,\n  unbox: unbox,\n  accessor: toAccessorString\n}\n","var check = require('./util/check')\nvar isTypedArray = require('./util/is-typed-array')\nvar isNDArrayLike = require('./util/is-ndarray')\nvar values = require('./util/values')\n\nvar primTypes = require('./constants/primitives.json')\nvar usageTypes = require('./constants/usage.json')\n\nvar GL_POINTS = 0\nvar GL_LINES = 1\nvar GL_TRIANGLES = 4\n\nvar GL_BYTE = 5120\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_SHORT = 5122\nvar GL_UNSIGNED_SHORT = 5123\nvar GL_INT = 5124\nvar GL_UNSIGNED_INT = 5125\n\nvar GL_ELEMENT_ARRAY_BUFFER = 34963\n\nvar GL_STREAM_DRAW = 0x88E0\nvar GL_STATIC_DRAW = 0x88E4\n\nmodule.exports = function wrapElementsState (gl, extensions, bufferState, stats) {\n  var elementSet = {}\n  var elementCount = 0\n\n  var elementTypes = {\n    'uint8': GL_UNSIGNED_BYTE,\n    'uint16': GL_UNSIGNED_SHORT\n  }\n\n  if (extensions.oes_element_index_uint) {\n    elementTypes.uint32 = GL_UNSIGNED_INT\n  }\n\n  function REGLElementBuffer (buffer) {\n    this.id = elementCount++\n    elementSet[this.id] = this\n    this.buffer = buffer\n    this.primType = GL_TRIANGLES\n    this.vertCount = 0\n    this.type = 0\n  }\n\n  REGLElementBuffer.prototype.bind = function () {\n    this.buffer.bind()\n  }\n\n  var bufferPool = []\n\n  function createElementStream (data) {\n    var result = bufferPool.pop()\n    if (!result) {\n      result = new REGLElementBuffer(bufferState.create(\n        null,\n        GL_ELEMENT_ARRAY_BUFFER,\n        true,\n        false)._buffer)\n    }\n    initElements(result, data, GL_STREAM_DRAW, -1, -1, 0, 0)\n    return result\n  }\n\n  function destroyElementStream (elements) {\n    bufferPool.push(elements)\n  }\n\n  function initElements (\n    elements,\n    data,\n    usage,\n    prim,\n    count,\n    byteLength,\n    type) {\n    var predictedType = type\n    if (!type && (\n        !isTypedArray(data) ||\n       (isNDArrayLike(data) && !isTypedArray(data.data)))) {\n      predictedType = extensions.oes_element_index_uint\n        ? GL_UNSIGNED_INT\n        : GL_UNSIGNED_SHORT\n    }\n    elements.buffer.bind()\n    bufferState._initBuffer(\n      elements.buffer,\n      data,\n      usage,\n      predictedType,\n      3)\n\n    var dtype = type\n    if (!type) {\n      switch (elements.buffer.dtype) {\n        case GL_UNSIGNED_BYTE:\n        case GL_BYTE:\n          dtype = GL_UNSIGNED_BYTE\n          break\n\n        case GL_UNSIGNED_SHORT:\n        case GL_SHORT:\n          dtype = GL_UNSIGNED_SHORT\n          break\n\n        case GL_UNSIGNED_INT:\n        case GL_INT:\n          dtype = GL_UNSIGNED_INT\n          break\n\n        default:\n          check.raise('unsupported type for element array')\n      }\n      elements.buffer.dtype = dtype\n    }\n    elements.type = dtype\n\n    // Check oes_element_index_uint extension\n    check(\n      dtype !== GL_UNSIGNED_INT ||\n      !!extensions.oes_element_index_uint,\n      '32 bit element buffers not supported, enable oes_element_index_uint first')\n\n    // try to guess default primitive type and arguments\n    var vertCount = count\n    if (vertCount < 0) {\n      vertCount = elements.buffer.byteLength\n      if (dtype === GL_UNSIGNED_SHORT) {\n        vertCount >>= 1\n      } else if (dtype === GL_UNSIGNED_INT) {\n        vertCount >>= 2\n      }\n    }\n    elements.vertCount = vertCount\n\n    // try to guess primitive type from cell dimension\n    var primType = prim\n    if (prim < 0) {\n      primType = GL_TRIANGLES\n      var dimension = elements.buffer.dimension\n      if (dimension === 1) primType = GL_POINTS\n      if (dimension === 2) primType = GL_LINES\n      if (dimension === 3) primType = GL_TRIANGLES\n    }\n    elements.primType = primType\n  }\n\n  function destroyElements (elements) {\n    stats.elementsCount--\n\n    check(elements.buffer !== null, 'must not double destroy elements')\n    delete elementSet[elements.id]\n    elements.buffer.destroy()\n    elements.buffer = null\n  }\n\n  function createElements (options, persistent) {\n    var buffer = bufferState.create(null, GL_ELEMENT_ARRAY_BUFFER, true)\n    var elements = new REGLElementBuffer(buffer._buffer)\n    stats.elementsCount++\n\n    function reglElements (options) {\n      if (!options) {\n        buffer()\n        elements.primType = GL_TRIANGLES\n        elements.vertCount = 0\n        elements.type = GL_UNSIGNED_BYTE\n      } else if (typeof options === 'number') {\n        buffer(options)\n        elements.primType = GL_TRIANGLES\n        elements.vertCount = options | 0\n        elements.type = GL_UNSIGNED_BYTE\n      } else {\n        var data = null\n        var usage = GL_STATIC_DRAW\n        var primType = -1\n        var vertCount = -1\n        var byteLength = 0\n        var dtype = 0\n        if (Array.isArray(options) ||\n            isTypedArray(options) ||\n            isNDArrayLike(options)) {\n          data = options\n        } else {\n          check.type(options, 'object', 'invalid arguments for elements')\n          if ('data' in options) {\n            data = options.data\n            check(\n                Array.isArray(data) ||\n                isTypedArray(data) ||\n                isNDArrayLike(data),\n                'invalid data for element buffer')\n          }\n          if ('usage' in options) {\n            check.parameter(\n              options.usage,\n              usageTypes,\n              'invalid element buffer usage')\n            usage = usageTypes[options.usage]\n          }\n          if ('primitive' in options) {\n            check.parameter(\n              options.primitive,\n              primTypes,\n              'invalid element buffer primitive')\n            primType = primTypes[options.primitive]\n          }\n          if ('count' in options) {\n            check(\n              typeof options.count === 'number' && options.count >= 0,\n              'invalid vertex count for elements')\n            vertCount = options.count | 0\n          }\n          if ('length' in options) {\n            byteLength = options.length | 0\n          }\n          if ('type' in options) {\n            check.parameter(\n              options.type,\n              elementTypes,\n              'invalid buffer type')\n            dtype = elementTypes[options.type]\n          }\n        }\n        if (data) {\n          initElements(\n            elements,\n            data,\n            usage,\n            primType,\n            vertCount,\n            byteLength,\n            dtype)\n        } else {\n          var _buffer = elements.buffer\n          _buffer.bind()\n          gl.bufferData(GL_ELEMENT_ARRAY_BUFFER, byteLength, usage)\n          _buffer.dtype = dtype || GL_UNSIGNED_BYTE\n          _buffer.usage = usage\n          _buffer.dimension = 3\n          _buffer.byteLength = byteLength\n          elements.primType = primType < 0 ? GL_TRIANGLES : primType\n          elements.vertCount = vertCount < 0 ? 0 : vertCount\n          elements.type = _buffer.dtype\n        }\n      }\n\n      return reglElements\n    }\n\n    reglElements(options)\n\n    reglElements._reglType = 'elements'\n    reglElements._elements = elements\n    reglElements.subdata = function (data, offset) {\n      buffer.subdata(data, offset)\n      return reglElements\n    }\n    reglElements.destroy = function () {\n      destroyElements(elements)\n    }\n\n    return reglElements\n  }\n\n  return {\n    create: createElements,\n    createStream: createElementStream,\n    destroyStream: destroyElementStream,\n    getElements: function (elements) {\n      if (typeof elements === 'function' &&\n          elements._elements instanceof REGLElementBuffer) {\n        return elements._elements\n      }\n      return null\n    },\n    clear: function () {\n      values(elementSet).forEach(destroyElements)\n    }\n  }\n}\n","var check = require('./util/check')\n\nmodule.exports = function createExtensionCache (gl, config) {\n  var extensions = {}\n\n  function tryLoadExtension (name_) {\n    check.type(name_, 'string', 'extension name must be string')\n    var name = name_.toLowerCase()\n    var ext\n    try {\n      ext = extensions[name] = gl.getExtension(name)\n    } catch (e) {}\n    return !!ext\n  }\n\n  for (var i = 0; i < config.extensions.length; ++i) {\n    var name = config.extensions[i]\n    if (!tryLoadExtension(name)) {\n      config.onDestroy()\n      config.onDone('\"' + name + '\" extension is not supported by the current WebGL context, try upgrading your system or a different browser')\n      return null\n    }\n  }\n\n  config.optionalExtensions.forEach(tryLoadExtension)\n\n  return {\n    extensions: extensions,\n    restore: function () {\n      Object.keys(extensions).forEach(function (name) {\n        if (!tryLoadExtension(name)) {\n          throw new Error('(regl): error restoring extension ' + name)\n        }\n      })\n    }\n  }\n}\n","var check = require('./util/check')\nvar values = require('./util/values')\nvar extend = require('./util/extend')\n\n// We store these constants so that the minifier can inline them\nvar GL_FRAMEBUFFER = 0x8D40\nvar GL_RENDERBUFFER = 0x8D41\n\nvar GL_TEXTURE_2D = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515\n\nvar GL_COLOR_ATTACHMENT0 = 0x8CE0\nvar GL_DEPTH_ATTACHMENT = 0x8D00\nvar GL_STENCIL_ATTACHMENT = 0x8D20\nvar GL_DEPTH_STENCIL_ATTACHMENT = 0x821A\n\nvar GL_FRAMEBUFFER_COMPLETE = 0x8CD5\nvar GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT = 0x8CD6\nvar GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7\nvar GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS = 0x8CD9\nvar GL_FRAMEBUFFER_UNSUPPORTED = 0x8CDD\n\nvar GL_HALF_FLOAT_OES = 0x8D61\nvar GL_UNSIGNED_BYTE = 0x1401\nvar GL_FLOAT = 0x1406\n\nvar GL_RGBA = 0x1908\n\nvar GL_DEPTH_COMPONENT = 0x1902\n\nvar colorTextureFormatEnums = [\n  GL_RGBA\n]\n\n// for every texture format, store\n// the number of channels\nvar textureFormatChannels = []\ntextureFormatChannels[GL_RGBA] = 4\n\n// for every texture type, store\n// the size in bytes.\nvar textureTypeSizes = []\ntextureTypeSizes[GL_UNSIGNED_BYTE] = 1\ntextureTypeSizes[GL_FLOAT] = 4\ntextureTypeSizes[GL_HALF_FLOAT_OES] = 2\n\nvar GL_RGBA4 = 0x8056\nvar GL_RGB5_A1 = 0x8057\nvar GL_RGB565 = 0x8D62\nvar GL_DEPTH_COMPONENT16 = 0x81A5\nvar GL_STENCIL_INDEX8 = 0x8D48\nvar GL_DEPTH_STENCIL = 0x84F9\n\nvar GL_SRGB8_ALPHA8_EXT = 0x8C43\n\nvar GL_RGBA32F_EXT = 0x8814\n\nvar GL_RGBA16F_EXT = 0x881A\nvar GL_RGB16F_EXT = 0x881B\n\nvar colorRenderbufferFormatEnums = [\n  GL_RGBA4,\n  GL_RGB5_A1,\n  GL_RGB565,\n  GL_SRGB8_ALPHA8_EXT,\n  GL_RGBA16F_EXT,\n  GL_RGB16F_EXT,\n  GL_RGBA32F_EXT\n]\n\nvar statusCode = {}\nstatusCode[GL_FRAMEBUFFER_COMPLETE] = 'complete'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT] = 'incomplete attachment'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS] = 'incomplete dimensions'\nstatusCode[GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT] = 'incomplete, missing attachment'\nstatusCode[GL_FRAMEBUFFER_UNSUPPORTED] = 'unsupported'\n\nmodule.exports = function wrapFBOState (\n  gl,\n  extensions,\n  limits,\n  textureState,\n  renderbufferState,\n  stats) {\n  var framebufferState = {\n    cur: null,\n    next: null,\n    dirty: false\n  }\n\n  var colorTextureFormats = ['rgba']\n  var colorRenderbufferFormats = ['rgba4', 'rgb565', 'rgb5 a1']\n\n  if (extensions.ext_srgb) {\n    colorRenderbufferFormats.push('srgba')\n  }\n\n  if (extensions.ext_color_buffer_half_float) {\n    colorRenderbufferFormats.push('rgba16f', 'rgb16f')\n  }\n\n  if (extensions.webgl_color_buffer_float) {\n    colorRenderbufferFormats.push('rgba32f')\n  }\n\n  var colorTypes = ['uint8']\n  if (extensions.oes_texture_half_float) {\n    colorTypes.push('half float', 'float16')\n  }\n  if (extensions.oes_texture_float) {\n    colorTypes.push('float', 'float32')\n  }\n\n  function FramebufferAttachment (target, texture, renderbuffer) {\n    this.target = target\n    this.texture = texture\n    this.renderbuffer = renderbuffer\n\n    var w = 0\n    var h = 0\n    if (texture) {\n      w = texture.width\n      h = texture.height\n    } else if (renderbuffer) {\n      w = renderbuffer.width\n      h = renderbuffer.height\n    }\n    this.width = w\n    this.height = h\n  }\n\n  function decRef (attachment) {\n    if (attachment) {\n      if (attachment.texture) {\n        attachment.texture._texture.decRef()\n      }\n      if (attachment.renderbuffer) {\n        attachment.renderbuffer._renderbuffer.decRef()\n      }\n    }\n  }\n\n  function incRefAndCheckShape (attachment, width, height) {\n    if (!attachment) {\n      return\n    }\n    if (attachment.texture) {\n      var texture = attachment.texture._texture\n      var tw = Math.max(1, texture.width)\n      var th = Math.max(1, texture.height)\n      check(tw === width && th === height,\n        'inconsistent width/height for supplied texture')\n      texture.refCount += 1\n    } else {\n      var renderbuffer = attachment.renderbuffer._renderbuffer\n      check(\n        renderbuffer.width === width && renderbuffer.height === height,\n        'inconsistent width/height for renderbuffer')\n      renderbuffer.refCount += 1\n    }\n  }\n\n  function attach (location, attachment) {\n    if (attachment) {\n      if (attachment.texture) {\n        gl.framebufferTexture2D(\n          GL_FRAMEBUFFER,\n          location,\n          attachment.target,\n          attachment.texture._texture.texture,\n          0)\n      } else {\n        gl.framebufferRenderbuffer(\n          GL_FRAMEBUFFER,\n          location,\n          GL_RENDERBUFFER,\n          attachment.renderbuffer._renderbuffer.renderbuffer)\n      }\n    } else {\n      gl.framebufferTexture2D(\n        GL_FRAMEBUFFER,\n        location,\n        GL_TEXTURE_2D,\n        null,\n        0)\n    }\n  }\n\n  function parseAttachment (attachment) {\n    var target = GL_TEXTURE_2D\n    var texture = null\n    var renderbuffer = null\n\n    var data = attachment\n    if (typeof attachment === 'object') {\n      data = attachment.data\n      if ('target' in attachment) {\n        target = attachment.target | 0\n      }\n    }\n\n    check.type(data, 'function', 'invalid attachment data')\n\n    var type = data._reglType\n    if (type === 'texture2d') {\n      texture = data\n      check(target === GL_TEXTURE_2D)\n    } else if (type === 'textureCube') {\n      texture = data\n      check(\n        target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&\n        target < GL_TEXTURE_CUBE_MAP_POSITIVE_X + 6,\n        'invalid cube map target')\n    } else if (type === 'renderbuffer') {\n      renderbuffer = data\n      target = GL_RENDERBUFFER\n    } else {\n      check.raise('invalid regl object for attachment')\n    }\n\n    return new FramebufferAttachment(target, texture, renderbuffer)\n  }\n\n  function allocAttachment (\n    width,\n    height,\n    isTexture,\n    format,\n    type) {\n    if (isTexture) {\n      var texture = textureState.create2D({\n        width: width,\n        height: height,\n        format: format,\n        type: type\n      })\n      texture._texture.refCount = 0\n      return new FramebufferAttachment(GL_TEXTURE_2D, texture, null)\n    } else {\n      var rb = renderbufferState.create({\n        width: width,\n        height: height,\n        format: format\n      })\n      rb._renderbuffer.refCount = 0\n      return new FramebufferAttachment(GL_RENDERBUFFER, null, rb)\n    }\n  }\n\n  function unwrapAttachment (attachment) {\n    return attachment && (attachment.texture || attachment.renderbuffer)\n  }\n\n  function resizeAttachment (attachment, w, h) {\n    if (attachment) {\n      if (attachment.texture) {\n        attachment.texture.resize(w, h)\n      } else if (attachment.renderbuffer) {\n        attachment.renderbuffer.resize(w, h)\n      }\n    }\n  }\n\n  var framebufferCount = 0\n  var framebufferSet = {}\n\n  function REGLFramebuffer () {\n    this.id = framebufferCount++\n    framebufferSet[this.id] = this\n\n    this.framebuffer = gl.createFramebuffer()\n    this.width = 0\n    this.height = 0\n\n    this.colorAttachments = []\n    this.depthAttachment = null\n    this.stencilAttachment = null\n    this.depthStencilAttachment = null\n  }\n\n  function decFBORefs (framebuffer) {\n    framebuffer.colorAttachments.forEach(decRef)\n    decRef(framebuffer.depthAttachment)\n    decRef(framebuffer.stencilAttachment)\n    decRef(framebuffer.depthStencilAttachment)\n  }\n\n  function destroy (framebuffer) {\n    var handle = framebuffer.framebuffer\n    check(handle, 'must not double destroy framebuffer')\n    gl.deleteFramebuffer(handle)\n    framebuffer.framebuffer = null\n    stats.framebufferCount--\n    delete framebufferSet[framebuffer.id]\n  }\n\n  function updateFramebuffer (framebuffer) {\n    var i\n\n    gl.bindFramebuffer(GL_FRAMEBUFFER, framebuffer.framebuffer)\n    var colorAttachments = framebuffer.colorAttachments\n    for (i = 0; i < colorAttachments.length; ++i) {\n      attach(GL_COLOR_ATTACHMENT0 + i, colorAttachments[i])\n    }\n    for (i = colorAttachments.length; i < limits.maxColorAttachments; ++i) {\n      attach(GL_COLOR_ATTACHMENT0 + i, null)\n    }\n    attach(GL_DEPTH_ATTACHMENT, framebuffer.depthAttachment)\n    attach(GL_STENCIL_ATTACHMENT, framebuffer.stencilAttachment)\n    attach(GL_DEPTH_STENCIL_ATTACHMENT, framebuffer.depthStencilAttachment)\n\n    // Check status code\n    var status = gl.checkFramebufferStatus(GL_FRAMEBUFFER)\n    if (status !== GL_FRAMEBUFFER_COMPLETE) {\n      check.raise('framebuffer configuration not supported, status = ' +\n        statusCode[status])\n    }\n\n    gl.bindFramebuffer(GL_FRAMEBUFFER, framebufferState.next)\n    framebufferState.cur = framebufferState.next\n\n    // FIXME: Clear error code here.  This is a work around for a bug in\n    // headless-gl\n    gl.getError()\n  }\n\n  function createFBO (a0, a1) {\n    var framebuffer = new REGLFramebuffer()\n    stats.framebufferCount++\n\n    function reglFramebuffer (a, b) {\n      var i\n\n      check(framebufferState.next !== framebuffer,\n        'can not update framebuffer which is currently in use')\n\n      var extDrawBuffers = extensions.webgl_draw_buffers\n\n      var width = 0\n      var height = 0\n\n      var needsDepth = true\n      var needsStencil = true\n\n      var colorBuffer = null\n      var colorTexture = true\n      var colorFormat = 'rgba'\n      var colorType = 'uint8'\n      var colorCount = 1\n\n      var depthBuffer = null\n      var stencilBuffer = null\n      var depthStencilBuffer = null\n      var depthStencilTexture = false\n\n      if (typeof a === 'number') {\n        width = a | 0\n        height = (b | 0) || width\n      } else if (!a) {\n        width = height = 1\n      } else {\n        check.type(a, 'object', 'invalid arguments for framebuffer')\n        var options = a\n\n        if ('shape' in options) {\n          var shape = options.shape\n          check(Array.isArray(shape) && shape.length >= 2,\n            'invalid shape for framebuffer')\n          width = shape[0]\n          height = shape[1]\n        } else {\n          if ('radius' in options) {\n            width = height = options.radius\n          }\n          if ('width' in options) {\n            width = options.width\n          }\n          if ('height' in options) {\n            height = options.height\n          }\n        }\n\n        if ('color' in options ||\n            'colors' in options) {\n          colorBuffer =\n            options.color ||\n            options.colors\n          if (Array.isArray(colorBuffer)) {\n            check(\n              colorBuffer.length === 1 || extDrawBuffers,\n              'multiple render targets not supported')\n          }\n        }\n\n        if (!colorBuffer) {\n          if ('colorCount' in options) {\n            colorCount = options.colorCount | 0\n            check(colorCount > 0, 'invalid color buffer count')\n          }\n\n          if ('colorTexture' in options) {\n            colorTexture = !!options.colorTexture\n            colorFormat = 'rgba4'\n          }\n\n          if ('colorType' in options) {\n            colorType = options.colorType\n            if (!colorTexture) {\n              if (colorType === 'half float' || colorType === 'float16') {\n                check(extensions.ext_color_buffer_half_float,\n                  'you must enable EXT_color_buffer_half_float to use 16-bit render buffers')\n                colorFormat = 'rgba16f'\n              } else if (colorType === 'float' || colorType === 'float32') {\n                check(extensions.webgl_color_buffer_float,\n                  'you must enable WEBGL_color_buffer_float in order to use 32-bit floating point renderbuffers')\n                colorFormat = 'rgba32f'\n              }\n            } else {\n              check(extensions.oes_texture_float ||\n                !(colorType === 'float' || colorType === 'float32'),\n                'you must enable OES_texture_float in order to use floating point framebuffer objects')\n              check(extensions.oes_texture_half_float ||\n                !(colorType === 'half float' || colorType === 'float16'),\n                'you must enable OES_texture_half_float in order to use 16-bit floating point framebuffer objects')\n            }\n            check.oneOf(colorType, colorTypes, 'invalid color type')\n          }\n\n          if ('colorFormat' in options) {\n            colorFormat = options.colorFormat\n            if (colorTextureFormats.indexOf(colorFormat) >= 0) {\n              colorTexture = true\n            } else if (colorRenderbufferFormats.indexOf(colorFormat) >= 0) {\n              colorTexture = false\n            } else {\n              if (colorTexture) {\n                check.oneOf(\n                  options.colorFormat, colorTextureFormats,\n                  'invalid color format for texture')\n              } else {\n                check.oneOf(\n                  options.colorFormat, colorRenderbufferFormats,\n                  'invalid color format for renderbuffer')\n              }\n            }\n          }\n        }\n\n        if ('depthTexture' in options || 'depthStencilTexture' in options) {\n          depthStencilTexture = !!(options.depthTexture ||\n            options.depthStencilTexture)\n          check(!depthStencilTexture || extensions.webgl_depth_texture,\n            'webgl_depth_texture extension not supported')\n        }\n\n        if ('depth' in options) {\n          if (typeof options.depth === 'boolean') {\n            needsDepth = options.depth\n          } else {\n            depthBuffer = options.depth\n            needsStencil = false\n          }\n        }\n\n        if ('stencil' in options) {\n          if (typeof options.stencil === 'boolean') {\n            needsStencil = options.stencil\n          } else {\n            stencilBuffer = options.stencil\n            needsDepth = false\n          }\n        }\n\n        if ('depthStencil' in options) {\n          if (typeof options.depthStencil === 'boolean') {\n            needsDepth = needsStencil = options.depthStencil\n          } else {\n            depthStencilBuffer = options.depthStencil\n            needsDepth = false\n            needsStencil = false\n          }\n        }\n      }\n\n      // parse attachments\n      var colorAttachments = null\n      var depthAttachment = null\n      var stencilAttachment = null\n      var depthStencilAttachment = null\n\n      // Set up color attachments\n      if (Array.isArray(colorBuffer)) {\n        colorAttachments = colorBuffer.map(parseAttachment)\n      } else if (colorBuffer) {\n        colorAttachments = [parseAttachment(colorBuffer)]\n      } else {\n        colorAttachments = new Array(colorCount)\n        for (i = 0; i < colorCount; ++i) {\n          colorAttachments[i] = allocAttachment(\n            width,\n            height,\n            colorTexture,\n            colorFormat,\n            colorType)\n        }\n      }\n\n      check(extensions.webgl_draw_buffers || colorAttachments.length <= 1,\n        'you must enable the WEBGL_draw_buffers extension in order to use multiple color buffers.')\n      check(colorAttachments.length <= limits.maxColorAttachments,\n        'too many color attachments, not supported')\n\n      width = width || colorAttachments[0].width\n      height = height || colorAttachments[0].height\n\n      if (depthBuffer) {\n        depthAttachment = parseAttachment(depthBuffer)\n      } else if (needsDepth && !needsStencil) {\n        depthAttachment = allocAttachment(\n          width,\n          height,\n          depthStencilTexture,\n          'depth',\n          'uint32')\n      }\n\n      if (stencilBuffer) {\n        stencilAttachment = parseAttachment(stencilBuffer)\n      } else if (needsStencil && !needsDepth) {\n        stencilAttachment = allocAttachment(\n          width,\n          height,\n          false,\n          'stencil',\n          'uint8')\n      }\n\n      if (depthStencilBuffer) {\n        depthStencilAttachment = parseAttachment(depthStencilBuffer)\n      } else if (!depthBuffer && !stencilBuffer && needsStencil && needsDepth) {\n        depthStencilAttachment = allocAttachment(\n          width,\n          height,\n          depthStencilTexture,\n          'depth stencil',\n          'depth stencil')\n      }\n\n      check(\n        (!!depthBuffer) + (!!stencilBuffer) + (!!depthStencilBuffer) <= 1,\n        'invalid framebuffer configuration, can specify exactly one depth/stencil attachment')\n\n      var commonColorAttachmentSize = null\n\n      for (i = 0; i < colorAttachments.length; ++i) {\n        incRefAndCheckShape(colorAttachments[i], width, height)\n        check(!colorAttachments[i] ||\n          (colorAttachments[i].texture &&\n            colorTextureFormatEnums.indexOf(colorAttachments[i].texture._texture.format) >= 0) ||\n          (colorAttachments[i].renderbuffer &&\n            colorRenderbufferFormatEnums.indexOf(colorAttachments[i].renderbuffer._renderbuffer.format) >= 0),\n          'framebuffer color attachment ' + i + ' is invalid')\n\n        if (colorAttachments[i] && colorAttachments[i].texture) {\n          var colorAttachmentSize =\n              textureFormatChannels[colorAttachments[i].texture._texture.format] *\n              textureTypeSizes[colorAttachments[i].texture._texture.type]\n\n          if (commonColorAttachmentSize === null) {\n            commonColorAttachmentSize = colorAttachmentSize\n          } else {\n            // We need to make sure that all color attachments have the same number of bitplanes\n            // (that is, the same numer of bits per pixel)\n            // This is required by the GLES2.0 standard. See the beginning of Chapter 4 in that document.\n            check(commonColorAttachmentSize === colorAttachmentSize,\n                  'all color attachments much have the same number of bits per pixel.')\n          }\n        }\n      }\n      incRefAndCheckShape(depthAttachment, width, height)\n      check(!depthAttachment ||\n        (depthAttachment.texture &&\n          depthAttachment.texture._texture.format === GL_DEPTH_COMPONENT) ||\n        (depthAttachment.renderbuffer &&\n          depthAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_COMPONENT16),\n        'invalid depth attachment for framebuffer object')\n      incRefAndCheckShape(stencilAttachment, width, height)\n      check(!stencilAttachment ||\n        (stencilAttachment.renderbuffer &&\n          stencilAttachment.renderbuffer._renderbuffer.format === GL_STENCIL_INDEX8),\n        'invalid stencil attachment for framebuffer object')\n      incRefAndCheckShape(depthStencilAttachment, width, height)\n      check(!depthStencilAttachment ||\n        (depthStencilAttachment.texture &&\n          depthStencilAttachment.texture._texture.format === GL_DEPTH_STENCIL) ||\n        (depthStencilAttachment.renderbuffer &&\n          depthStencilAttachment.renderbuffer._renderbuffer.format === GL_DEPTH_STENCIL),\n        'invalid depth-stencil attachment for framebuffer object')\n\n      // decrement references\n      decFBORefs(framebuffer)\n\n      framebuffer.width = width\n      framebuffer.height = height\n\n      framebuffer.colorAttachments = colorAttachments\n      framebuffer.depthAttachment = depthAttachment\n      framebuffer.stencilAttachment = stencilAttachment\n      framebuffer.depthStencilAttachment = depthStencilAttachment\n\n      reglFramebuffer.color = colorAttachments.map(unwrapAttachment)\n      reglFramebuffer.depth = unwrapAttachment(depthAttachment)\n      reglFramebuffer.stencil = unwrapAttachment(stencilAttachment)\n      reglFramebuffer.depthStencil = unwrapAttachment(depthStencilAttachment)\n\n      reglFramebuffer.width = framebuffer.width\n      reglFramebuffer.height = framebuffer.height\n\n      updateFramebuffer(framebuffer)\n\n      return reglFramebuffer\n    }\n\n    function resize (w_, h_) {\n      check(framebufferState.next !== framebuffer,\n        'can not resize a framebuffer which is currently in use')\n\n      var w = w_ | 0\n      var h = (h_ | 0) || w\n      if (w === framebuffer.width && h === framebuffer.height) {\n        return reglFramebuffer\n      }\n\n      // resize all buffers\n      var colorAttachments = framebuffer.colorAttachments\n      for (var i = 0; i < colorAttachments.length; ++i) {\n        resizeAttachment(colorAttachments[i], w, h)\n      }\n      resizeAttachment(framebuffer.depthAttachment, w, h)\n      resizeAttachment(framebuffer.stencilAttachment, w, h)\n      resizeAttachment(framebuffer.depthStencilAttachment, w, h)\n\n      framebuffer.width = reglFramebuffer.width = w\n      framebuffer.height = reglFramebuffer.height = h\n\n      updateFramebuffer(framebuffer)\n\n      return reglFramebuffer\n    }\n\n    reglFramebuffer(a0, a1)\n\n    return extend(reglFramebuffer, {\n      resize: resize,\n      _reglType: 'framebuffer',\n      _framebuffer: framebuffer,\n      destroy: function () {\n        destroy(framebuffer)\n        decFBORefs(framebuffer)\n      }\n    })\n  }\n\n  function createCubeFBO (options) {\n    var faces = Array(6)\n\n    function reglFramebufferCube (a) {\n      var i\n\n      check(faces.indexOf(framebufferState.next) < 0,\n        'can not update framebuffer which is currently in use')\n\n      var extDrawBuffers = extensions.webgl_draw_buffers\n\n      var params = {\n        color: null\n      }\n\n      var radius = 0\n\n      var colorBuffer = null\n      var colorFormat = 'rgba'\n      var colorType = 'uint8'\n      var colorCount = 1\n\n      if (typeof a === 'number') {\n        radius = a | 0\n      } else if (!a) {\n        radius = 1\n      } else {\n        check.type(a, 'object', 'invalid arguments for framebuffer')\n        var options = a\n\n        if ('shape' in options) {\n          var shape = options.shape\n          check(\n            Array.isArray(shape) && shape.length >= 2,\n            'invalid shape for framebuffer')\n          check(\n            shape[0] === shape[1],\n            'cube framebuffer must be square')\n          radius = shape[0]\n        } else {\n          if ('radius' in options) {\n            radius = options.radius | 0\n          }\n          if ('width' in options) {\n            radius = options.width | 0\n            if ('height' in options) {\n              check(options.height === radius, 'must be square')\n            }\n          } else if ('height' in options) {\n            radius = options.height | 0\n          }\n        }\n\n        if ('color' in options ||\n            'colors' in options) {\n          colorBuffer =\n            options.color ||\n            options.colors\n          if (Array.isArray(colorBuffer)) {\n            check(\n              colorBuffer.length === 1 || extDrawBuffers,\n              'multiple render targets not supported')\n          }\n        }\n\n        if (!colorBuffer) {\n          if ('colorCount' in options) {\n            colorCount = options.colorCount | 0\n            check(colorCount > 0, 'invalid color buffer count')\n          }\n\n          if ('colorType' in options) {\n            check.oneOf(\n              options.colorType, colorTypes,\n              'invalid color type')\n            colorType = options.colorType\n          }\n\n          if ('colorFormat' in options) {\n            colorFormat = options.colorFormat\n            check.oneOf(\n              options.colorFormat, colorTextureFormats,\n              'invalid color format for texture')\n          }\n        }\n\n        if ('depth' in options) {\n          params.depth = options.depth\n        }\n\n        if ('stencil' in options) {\n          params.stencil = options.stencil\n        }\n\n        if ('depthStencil' in options) {\n          params.depthStencil = options.depthStencil\n        }\n      }\n\n      var colorCubes\n      if (colorBuffer) {\n        if (Array.isArray(colorBuffer)) {\n          colorCubes = []\n          for (i = 0; i < colorBuffer.length; ++i) {\n            colorCubes[i] = colorBuffer[i]\n          }\n        } else {\n          colorCubes = [ colorBuffer ]\n        }\n      } else {\n        colorCubes = Array(colorCount)\n        var cubeMapParams = {\n          radius: radius,\n          format: colorFormat,\n          type: colorType\n        }\n        for (i = 0; i < colorCount; ++i) {\n          colorCubes[i] = textureState.createCube(cubeMapParams)\n        }\n      }\n\n      // Check color cubes\n      params.color = Array(colorCubes.length)\n      for (i = 0; i < colorCubes.length; ++i) {\n        var cube = colorCubes[i]\n        check(\n          typeof cube === 'function' && cube._reglType === 'textureCube',\n          'invalid cube map')\n        radius = radius || cube.width\n        check(\n          cube.width === radius && cube.height === radius,\n          'invalid cube map shape')\n        params.color[i] = {\n          target: GL_TEXTURE_CUBE_MAP_POSITIVE_X,\n          data: colorCubes[i]\n        }\n      }\n\n      for (i = 0; i < 6; ++i) {\n        for (var j = 0; j < colorCubes.length; ++j) {\n          params.color[j].target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + i\n        }\n        // reuse depth-stencil attachments across all cube maps\n        if (i > 0) {\n          params.depth = faces[0].depth\n          params.stencil = faces[0].stencil\n          params.depthStencil = faces[0].depthStencil\n        }\n        if (faces[i]) {\n          (faces[i])(params)\n        } else {\n          faces[i] = createFBO(params)\n        }\n      }\n\n      return extend(reglFramebufferCube, {\n        width: radius,\n        height: radius,\n        color: colorCubes\n      })\n    }\n\n    function resize (radius_) {\n      var i\n      var radius = radius_ | 0\n      check(radius > 0 && radius <= limits.maxCubeMapSize,\n        'invalid radius for cube fbo')\n\n      if (radius === reglFramebufferCube.width) {\n        return reglFramebufferCube\n      }\n\n      var colors = reglFramebufferCube.color\n      for (i = 0; i < colors.length; ++i) {\n        colors[i].resize(radius)\n      }\n\n      for (i = 0; i < 6; ++i) {\n        faces[i].resize(radius)\n      }\n\n      reglFramebufferCube.width = reglFramebufferCube.height = radius\n\n      return reglFramebufferCube\n    }\n\n    reglFramebufferCube(options)\n\n    return extend(reglFramebufferCube, {\n      faces: faces,\n      resize: resize,\n      _reglType: 'framebufferCube',\n      destroy: function () {\n        faces.forEach(function (f) {\n          f.destroy()\n        })\n      }\n    })\n  }\n\n  function restoreFramebuffers () {\n    values(framebufferSet).forEach(function (fb) {\n      fb.framebuffer = gl.createFramebuffer()\n      updateFramebuffer(fb)\n    })\n  }\n\n  return extend(framebufferState, {\n    getFramebuffer: function (object) {\n      if (typeof object === 'function' && object._reglType === 'framebuffer') {\n        var fbo = object._framebuffer\n        if (fbo instanceof REGLFramebuffer) {\n          return fbo\n        }\n      }\n      return null\n    },\n    create: createFBO,\n    createCube: createCubeFBO,\n    clear: function () {\n      values(framebufferSet).forEach(destroy)\n    },\n    restore: restoreFramebuffers\n  })\n}\n","var GL_SUBPIXEL_BITS = 0x0D50\nvar GL_RED_BITS = 0x0D52\nvar GL_GREEN_BITS = 0x0D53\nvar GL_BLUE_BITS = 0x0D54\nvar GL_ALPHA_BITS = 0x0D55\nvar GL_DEPTH_BITS = 0x0D56\nvar GL_STENCIL_BITS = 0x0D57\n\nvar GL_ALIASED_POINT_SIZE_RANGE = 0x846D\nvar GL_ALIASED_LINE_WIDTH_RANGE = 0x846E\n\nvar GL_MAX_TEXTURE_SIZE = 0x0D33\nvar GL_MAX_VIEWPORT_DIMS = 0x0D3A\nvar GL_MAX_VERTEX_ATTRIBS = 0x8869\nvar GL_MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB\nvar GL_MAX_VARYING_VECTORS = 0x8DFC\nvar GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D\nvar GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS = 0x8B4C\nvar GL_MAX_TEXTURE_IMAGE_UNITS = 0x8872\nvar GL_MAX_FRAGMENT_UNIFORM_VECTORS = 0x8DFD\nvar GL_MAX_CUBE_MAP_TEXTURE_SIZE = 0x851C\nvar GL_MAX_RENDERBUFFER_SIZE = 0x84E8\n\nvar GL_VENDOR = 0x1F00\nvar GL_RENDERER = 0x1F01\nvar GL_VERSION = 0x1F02\nvar GL_SHADING_LANGUAGE_VERSION = 0x8B8C\n\nvar GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF\n\nvar GL_MAX_COLOR_ATTACHMENTS_WEBGL = 0x8CDF\nvar GL_MAX_DRAW_BUFFERS_WEBGL = 0x8824\n\nmodule.exports = function (gl, extensions) {\n  var maxAnisotropic = 1\n  if (extensions.ext_texture_filter_anisotropic) {\n    maxAnisotropic = gl.getParameter(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT)\n  }\n\n  var maxDrawbuffers = 1\n  var maxColorAttachments = 1\n  if (extensions.webgl_draw_buffers) {\n    maxDrawbuffers = gl.getParameter(GL_MAX_DRAW_BUFFERS_WEBGL)\n    maxColorAttachments = gl.getParameter(GL_MAX_COLOR_ATTACHMENTS_WEBGL)\n  }\n\n  return {\n    // drawing buffer bit depth\n    colorBits: [\n      gl.getParameter(GL_RED_BITS),\n      gl.getParameter(GL_GREEN_BITS),\n      gl.getParameter(GL_BLUE_BITS),\n      gl.getParameter(GL_ALPHA_BITS)\n    ],\n    depthBits: gl.getParameter(GL_DEPTH_BITS),\n    stencilBits: gl.getParameter(GL_STENCIL_BITS),\n    subpixelBits: gl.getParameter(GL_SUBPIXEL_BITS),\n\n    // supported extensions\n    extensions: Object.keys(extensions).filter(function (ext) {\n      return !!extensions[ext]\n    }),\n\n    // max aniso samples\n    maxAnisotropic: maxAnisotropic,\n\n    // max draw buffers\n    maxDrawbuffers: maxDrawbuffers,\n    maxColorAttachments: maxColorAttachments,\n\n    // point and line size ranges\n    pointSizeDims: gl.getParameter(GL_ALIASED_POINT_SIZE_RANGE),\n    lineWidthDims: gl.getParameter(GL_ALIASED_LINE_WIDTH_RANGE),\n    maxViewportDims: gl.getParameter(GL_MAX_VIEWPORT_DIMS),\n    maxCombinedTextureUnits: gl.getParameter(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS),\n    maxCubeMapSize: gl.getParameter(GL_MAX_CUBE_MAP_TEXTURE_SIZE),\n    maxRenderbufferSize: gl.getParameter(GL_MAX_RENDERBUFFER_SIZE),\n    maxTextureUnits: gl.getParameter(GL_MAX_TEXTURE_IMAGE_UNITS),\n    maxTextureSize: gl.getParameter(GL_MAX_TEXTURE_SIZE),\n    maxAttributes: gl.getParameter(GL_MAX_VERTEX_ATTRIBS),\n    maxVertexUniforms: gl.getParameter(GL_MAX_VERTEX_UNIFORM_VECTORS),\n    maxVertexTextureUnits: gl.getParameter(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS),\n    maxVaryingVectors: gl.getParameter(GL_MAX_VARYING_VECTORS),\n    maxFragmentUniforms: gl.getParameter(GL_MAX_FRAGMENT_UNIFORM_VECTORS),\n\n    // vendor info\n    glsl: gl.getParameter(GL_SHADING_LANGUAGE_VERSION),\n    renderer: gl.getParameter(GL_RENDERER),\n    vendor: gl.getParameter(GL_VENDOR),\n    version: gl.getParameter(GL_VERSION)\n  }\n}\n","var check = require('./util/check')\nvar isTypedArray = require('./util/is-typed-array')\n\nvar GL_RGBA = 6408\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_PACK_ALIGNMENT = 0x0D05\nvar GL_FLOAT = 0x1406 // 5126\n\nmodule.exports = function wrapReadPixels (\n  gl,\n  framebufferState,\n  reglPoll,\n  context,\n  glAttributes,\n  extensions) {\n  function readPixels (input) {\n    var type\n    if (framebufferState.next === null) {\n      check(\n        glAttributes.preserveDrawingBuffer,\n        'you must create a webgl context with \"preserveDrawingBuffer\":true in order to read pixels from the drawing buffer')\n      type = GL_UNSIGNED_BYTE\n    } else {\n      check(\n        framebufferState.next.colorAttachments[0].texture !== null,\n          'You cannot read from a renderbuffer')\n      type = framebufferState.next.colorAttachments[0].texture._texture.type\n\n      if (extensions.oes_texture_float) {\n        check(\n          type === GL_UNSIGNED_BYTE || type === GL_FLOAT,\n          'Reading from a framebuffer is only allowed for the types \\'uint8\\' and \\'float\\'')\n      } else {\n        check(\n          type === GL_UNSIGNED_BYTE,\n          'Reading from a framebuffer is only allowed for the type \\'uint8\\'')\n      }\n    }\n\n    var x = 0\n    var y = 0\n    var width = context.framebufferWidth\n    var height = context.framebufferHeight\n    var data = null\n\n    if (isTypedArray(input)) {\n      data = input\n    } else if (input) {\n      check.type(input, 'object', 'invalid arguments to regl.read()')\n      x = input.x | 0\n      y = input.y | 0\n      check(\n        x >= 0 && x < context.framebufferWidth,\n        'invalid x offset for regl.read')\n      check(\n        y >= 0 && y < context.framebufferHeight,\n        'invalid y offset for regl.read')\n      width = (input.width || (context.framebufferWidth - x)) | 0\n      height = (input.height || (context.framebufferHeight - y)) | 0\n      data = input.data || null\n    }\n\n    // sanity check input.data\n    if (data) {\n      if (type === GL_UNSIGNED_BYTE) {\n        check(\n          data instanceof Uint8Array,\n          'buffer must be \\'Uint8Array\\' when reading from a framebuffer of type \\'uint8\\'')\n      } else if (type === GL_FLOAT) {\n        check(\n          data instanceof Float32Array,\n          'buffer must be \\'Float32Array\\' when reading from a framebuffer of type \\'float\\'')\n      }\n    }\n\n    check(\n      width > 0 && width + x <= context.framebufferWidth,\n      'invalid width for read pixels')\n    check(\n      height > 0 && height + y <= context.framebufferHeight,\n      'invalid height for read pixels')\n\n    // Update WebGL state\n    reglPoll()\n\n    // Compute size\n    var size = width * height * 4\n\n    // Allocate data\n    if (!data) {\n      if (type === GL_UNSIGNED_BYTE) {\n        data = new Uint8Array(size)\n      } else if (type === GL_FLOAT) {\n        data = data || new Float32Array(size)\n      }\n    }\n\n    // Type check\n    check.isTypedArray(data, 'data buffer for regl.read() must be a typedarray')\n    check(data.byteLength >= size, 'data buffer for regl.read() too small')\n\n    // Run read pixels\n    gl.pixelStorei(GL_PACK_ALIGNMENT, 4)\n    gl.readPixels(x, y, width, height, GL_RGBA,\n                  type,\n                  data)\n\n    return data\n  }\n\n  return readPixels\n}\n","var check = require('./util/check')\nvar values = require('./util/values')\n\nvar GL_RENDERBUFFER = 0x8D41\n\nvar GL_RGBA4 = 0x8056\nvar GL_RGB5_A1 = 0x8057\nvar GL_RGB565 = 0x8D62\nvar GL_DEPTH_COMPONENT16 = 0x81A5\nvar GL_STENCIL_INDEX8 = 0x8D48\nvar GL_DEPTH_STENCIL = 0x84F9\n\nvar GL_SRGB8_ALPHA8_EXT = 0x8C43\n\nvar GL_RGBA32F_EXT = 0x8814\n\nvar GL_RGBA16F_EXT = 0x881A\nvar GL_RGB16F_EXT = 0x881B\n\nvar FORMAT_SIZES = []\n\nFORMAT_SIZES[GL_RGBA4] = 2\nFORMAT_SIZES[GL_RGB5_A1] = 2\nFORMAT_SIZES[GL_RGB565] = 2\n\nFORMAT_SIZES[GL_DEPTH_COMPONENT16] = 2\nFORMAT_SIZES[GL_STENCIL_INDEX8] = 1\nFORMAT_SIZES[GL_DEPTH_STENCIL] = 4\n\nFORMAT_SIZES[GL_SRGB8_ALPHA8_EXT] = 4\nFORMAT_SIZES[GL_RGBA32F_EXT] = 16\nFORMAT_SIZES[GL_RGBA16F_EXT] = 8\nFORMAT_SIZES[GL_RGB16F_EXT] = 6\n\nfunction getRenderbufferSize (format, width, height) {\n  return FORMAT_SIZES[format] * width * height\n}\n\nmodule.exports = function (gl, extensions, limits, stats, config) {\n  var formatTypes = {\n    'rgba4': GL_RGBA4,\n    'rgb565': GL_RGB565,\n    'rgb5 a1': GL_RGB5_A1,\n    'depth': GL_DEPTH_COMPONENT16,\n    'stencil': GL_STENCIL_INDEX8,\n    'depth stencil': GL_DEPTH_STENCIL\n  }\n\n  if (extensions.ext_srgb) {\n    formatTypes['srgba'] = GL_SRGB8_ALPHA8_EXT\n  }\n\n  if (extensions.ext_color_buffer_half_float) {\n    formatTypes['rgba16f'] = GL_RGBA16F_EXT\n    formatTypes['rgb16f'] = GL_RGB16F_EXT\n  }\n\n  if (extensions.webgl_color_buffer_float) {\n    formatTypes['rgba32f'] = GL_RGBA32F_EXT\n  }\n\n  var formatTypesInvert = []\n  Object.keys(formatTypes).forEach(function (key) {\n    var val = formatTypes[key]\n    formatTypesInvert[val] = key\n  })\n\n  var renderbufferCount = 0\n  var renderbufferSet = {}\n\n  function REGLRenderbuffer (renderbuffer) {\n    this.id = renderbufferCount++\n    this.refCount = 1\n\n    this.renderbuffer = renderbuffer\n\n    this.format = GL_RGBA4\n    this.width = 0\n    this.height = 0\n\n    if (config.profile) {\n      this.stats = {size: 0}\n    }\n  }\n\n  REGLRenderbuffer.prototype.decRef = function () {\n    if (--this.refCount <= 0) {\n      destroy(this)\n    }\n  }\n\n  function destroy (rb) {\n    var handle = rb.renderbuffer\n    check(handle, 'must not double destroy renderbuffer')\n    gl.bindRenderbuffer(GL_RENDERBUFFER, null)\n    gl.deleteRenderbuffer(handle)\n    rb.renderbuffer = null\n    rb.refCount = 0\n    delete renderbufferSet[rb.id]\n    stats.renderbufferCount--\n  }\n\n  function createRenderbuffer (a, b) {\n    var renderbuffer = new REGLRenderbuffer(gl.createRenderbuffer())\n    renderbufferSet[renderbuffer.id] = renderbuffer\n    stats.renderbufferCount++\n\n    function reglRenderbuffer (a, b) {\n      var w = 0\n      var h = 0\n      var format = GL_RGBA4\n\n      if (typeof a === 'object' && a) {\n        var options = a\n        if ('shape' in options) {\n          var shape = options.shape\n          check(Array.isArray(shape) && shape.length >= 2,\n            'invalid renderbuffer shape')\n          w = shape[0] | 0\n          h = shape[1] | 0\n        } else {\n          if ('radius' in options) {\n            w = h = options.radius | 0\n          }\n          if ('width' in options) {\n            w = options.width | 0\n          }\n          if ('height' in options) {\n            h = options.height | 0\n          }\n        }\n        if ('format' in options) {\n          check.parameter(options.format, formatTypes,\n            'invalid renderbuffer format')\n          format = formatTypes[options.format]\n        }\n      } else if (typeof a === 'number') {\n        w = a | 0\n        if (typeof b === 'number') {\n          h = b | 0\n        } else {\n          h = w\n        }\n      } else if (!a) {\n        w = h = 1\n      } else {\n        check.raise('invalid arguments to renderbuffer constructor')\n      }\n\n      // check shape\n      check(\n        w > 0 && h > 0 &&\n        w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,\n        'invalid renderbuffer size')\n\n      if (w === renderbuffer.width &&\n          h === renderbuffer.height &&\n          format === renderbuffer.format) {\n        return\n      }\n\n      reglRenderbuffer.width = renderbuffer.width = w\n      reglRenderbuffer.height = renderbuffer.height = h\n      renderbuffer.format = format\n\n      gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, format, w, h)\n\n      if (config.profile) {\n        renderbuffer.stats.size = getRenderbufferSize(renderbuffer.format, renderbuffer.width, renderbuffer.height)\n      }\n      reglRenderbuffer.format = formatTypesInvert[renderbuffer.format]\n\n      return reglRenderbuffer\n    }\n\n    function resize (w_, h_) {\n      var w = w_ | 0\n      var h = (h_ | 0) || w\n\n      if (w === renderbuffer.width && h === renderbuffer.height) {\n        return reglRenderbuffer\n      }\n\n      // check shape\n      check(\n        w > 0 && h > 0 &&\n        w <= limits.maxRenderbufferSize && h <= limits.maxRenderbufferSize,\n        'invalid renderbuffer size')\n\n      reglRenderbuffer.width = renderbuffer.width = w\n      reglRenderbuffer.height = renderbuffer.height = h\n\n      gl.bindRenderbuffer(GL_RENDERBUFFER, renderbuffer.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, renderbuffer.format, w, h)\n\n      // also, recompute size.\n      if (config.profile) {\n        renderbuffer.stats.size = getRenderbufferSize(\n          renderbuffer.format, renderbuffer.width, renderbuffer.height)\n      }\n\n      return reglRenderbuffer\n    }\n\n    reglRenderbuffer(a, b)\n\n    reglRenderbuffer.resize = resize\n    reglRenderbuffer._reglType = 'renderbuffer'\n    reglRenderbuffer._renderbuffer = renderbuffer\n    if (config.profile) {\n      reglRenderbuffer.stats = renderbuffer.stats\n    }\n    reglRenderbuffer.destroy = function () {\n      renderbuffer.decRef()\n    }\n\n    return reglRenderbuffer\n  }\n\n  if (config.profile) {\n    stats.getTotalRenderbufferSize = function () {\n      var total = 0\n      Object.keys(renderbufferSet).forEach(function (key) {\n        total += renderbufferSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  function restoreRenderbuffers () {\n    values(renderbufferSet).forEach(function (rb) {\n      rb.renderbuffer = gl.createRenderbuffer()\n      gl.bindRenderbuffer(GL_RENDERBUFFER, rb.renderbuffer)\n      gl.renderbufferStorage(GL_RENDERBUFFER, rb.format, rb.width, rb.height)\n    })\n    gl.bindRenderbuffer(GL_RENDERBUFFER, null)\n  }\n\n  return {\n    create: createRenderbuffer,\n    clear: function () {\n      values(renderbufferSet).forEach(destroy)\n    },\n    restore: restoreRenderbuffers\n  }\n}\n","var check = require('./util/check')\nvar values = require('./util/values')\n\nvar GL_FRAGMENT_SHADER = 35632\nvar GL_VERTEX_SHADER = 35633\n\nvar GL_ACTIVE_UNIFORMS = 0x8B86\nvar GL_ACTIVE_ATTRIBUTES = 0x8B89\n\nmodule.exports = function wrapShaderState (gl, stringStore, stats, config) {\n  // ===================================================\n  // glsl compilation and linking\n  // ===================================================\n  var fragShaders = {}\n  var vertShaders = {}\n\n  function ActiveInfo (name, id, location, info) {\n    this.name = name\n    this.id = id\n    this.location = location\n    this.info = info\n  }\n\n  function insertActiveInfo (list, info) {\n    for (var i = 0; i < list.length; ++i) {\n      if (list[i].id === info.id) {\n        list[i].location = info.location\n        return\n      }\n    }\n    list.push(info)\n  }\n\n  function getShader (type, id, command) {\n    var cache = type === GL_FRAGMENT_SHADER ? fragShaders : vertShaders\n    var shader = cache[id]\n\n    if (!shader) {\n      var source = stringStore.str(id)\n      shader = gl.createShader(type)\n      gl.shaderSource(shader, source)\n      gl.compileShader(shader)\n      check.shaderError(gl, shader, source, type, command)\n      cache[id] = shader\n    }\n\n    return shader\n  }\n\n  // ===================================================\n  // program linking\n  // ===================================================\n  var programCache = {}\n  var programList = []\n\n  var PROGRAM_COUNTER = 0\n\n  function REGLProgram (fragId, vertId) {\n    this.id = PROGRAM_COUNTER++\n    this.fragId = fragId\n    this.vertId = vertId\n    this.program = null\n    this.uniforms = []\n    this.attributes = []\n\n    if (config.profile) {\n      this.stats = {\n        uniformsCount: 0,\n        attributesCount: 0\n      }\n    }\n  }\n\n  function linkProgram (desc, command) {\n    var i, info\n\n    // -------------------------------\n    // compile & link\n    // -------------------------------\n    var fragShader = getShader(GL_FRAGMENT_SHADER, desc.fragId)\n    var vertShader = getShader(GL_VERTEX_SHADER, desc.vertId)\n\n    var program = desc.program = gl.createProgram()\n    gl.attachShader(program, fragShader)\n    gl.attachShader(program, vertShader)\n    gl.linkProgram(program)\n    check.linkError(\n      gl,\n      program,\n      stringStore.str(desc.fragId),\n      stringStore.str(desc.vertId),\n      command)\n\n    // -------------------------------\n    // grab uniforms\n    // -------------------------------\n    var numUniforms = gl.getProgramParameter(program, GL_ACTIVE_UNIFORMS)\n    if (config.profile) {\n      desc.stats.uniformsCount = numUniforms\n    }\n    var uniforms = desc.uniforms\n    for (i = 0; i < numUniforms; ++i) {\n      info = gl.getActiveUniform(program, i)\n      if (info) {\n        if (info.size > 1) {\n          for (var j = 0; j < info.size; ++j) {\n            var name = info.name.replace('[0]', '[' + j + ']')\n            insertActiveInfo(uniforms, new ActiveInfo(\n              name,\n              stringStore.id(name),\n              gl.getUniformLocation(program, name),\n              info))\n          }\n        } else {\n          insertActiveInfo(uniforms, new ActiveInfo(\n            info.name,\n            stringStore.id(info.name),\n            gl.getUniformLocation(program, info.name),\n            info))\n        }\n      }\n    }\n\n    // -------------------------------\n    // grab attributes\n    // -------------------------------\n    var numAttributes = gl.getProgramParameter(program, GL_ACTIVE_ATTRIBUTES)\n    if (config.profile) {\n      desc.stats.attributesCount = numAttributes\n    }\n\n    var attributes = desc.attributes\n    for (i = 0; i < numAttributes; ++i) {\n      info = gl.getActiveAttrib(program, i)\n      if (info) {\n        insertActiveInfo(attributes, new ActiveInfo(\n          info.name,\n          stringStore.id(info.name),\n          gl.getAttribLocation(program, info.name),\n          info))\n      }\n    }\n  }\n\n  if (config.profile) {\n    stats.getMaxUniformsCount = function () {\n      var m = 0\n      programList.forEach(function (desc) {\n        if (desc.stats.uniformsCount > m) {\n          m = desc.stats.uniformsCount\n        }\n      })\n      return m\n    }\n\n    stats.getMaxAttributesCount = function () {\n      var m = 0\n      programList.forEach(function (desc) {\n        if (desc.stats.attributesCount > m) {\n          m = desc.stats.attributesCount\n        }\n      })\n      return m\n    }\n  }\n\n  function restoreShaders () {\n    fragShaders = {}\n    vertShaders = {}\n    for (var i = 0; i < programList.length; ++i) {\n      linkProgram(programList[i])\n    }\n  }\n\n  return {\n    clear: function () {\n      var deleteShader = gl.deleteShader.bind(gl)\n      values(fragShaders).forEach(deleteShader)\n      fragShaders = {}\n      values(vertShaders).forEach(deleteShader)\n      vertShaders = {}\n\n      programList.forEach(function (desc) {\n        gl.deleteProgram(desc.program)\n      })\n      programList.length = 0\n      programCache = {}\n\n      stats.shaderCount = 0\n    },\n\n    program: function (vertId, fragId, command) {\n      check.command(vertId >= 0, 'missing vertex shader', command)\n      check.command(fragId >= 0, 'missing fragment shader', command)\n\n      stats.shaderCount++\n\n      var cache = programCache[fragId]\n      if (!cache) {\n        cache = programCache[fragId] = {}\n      }\n      var program = cache[vertId]\n      if (!program) {\n        program = new REGLProgram(fragId, vertId)\n        linkProgram(program, command)\n        cache[vertId] = program\n        programList.push(program)\n      }\n      return program\n    },\n\n    restore: restoreShaders,\n\n    shader: getShader,\n\n    frag: -1,\n    vert: -1\n  }\n}\n","\nmodule.exports = function stats () {\n  return {\n    bufferCount: 0,\n    elementsCount: 0,\n    framebufferCount: 0,\n    shaderCount: 0,\n    textureCount: 0,\n    cubeCount: 0,\n    renderbufferCount: 0,\n\n    maxTextureUnits: 0\n  }\n}\n","module.exports = function createStringStore () {\n  var stringIds = {'': 0}\n  var stringValues = ['']\n  return {\n    id: function (str) {\n      var result = stringIds[str]\n      if (result) {\n        return result\n      }\n      result = stringIds[str] = stringValues.length\n      stringValues.push(str)\n      return result\n    },\n\n    str: function (id) {\n      return stringValues[id]\n    }\n  }\n}\n","var check = require('./util/check')\nvar extend = require('./util/extend')\nvar values = require('./util/values')\nvar isTypedArray = require('./util/is-typed-array')\nvar isNDArrayLike = require('./util/is-ndarray')\nvar pool = require('./util/pool')\nvar convertToHalfFloat = require('./util/to-half-float')\nvar isArrayLike = require('./util/is-array-like')\n\nvar dtypes = require('./constants/arraytypes.json')\nvar arrayTypes = require('./constants/arraytypes.json')\n\nvar GL_COMPRESSED_TEXTURE_FORMATS = 0x86A3\n\nvar GL_TEXTURE_2D = 0x0DE1\nvar GL_TEXTURE_CUBE_MAP = 0x8513\nvar GL_TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515\n\nvar GL_RGBA = 0x1908\nvar GL_ALPHA = 0x1906\nvar GL_RGB = 0x1907\nvar GL_LUMINANCE = 0x1909\nvar GL_LUMINANCE_ALPHA = 0x190A\n\nvar GL_RGBA4 = 0x8056\nvar GL_RGB5_A1 = 0x8057\nvar GL_RGB565 = 0x8D62\n\nvar GL_UNSIGNED_SHORT_4_4_4_4 = 0x8033\nvar GL_UNSIGNED_SHORT_5_5_5_1 = 0x8034\nvar GL_UNSIGNED_SHORT_5_6_5 = 0x8363\nvar GL_UNSIGNED_INT_24_8_WEBGL = 0x84FA\n\nvar GL_DEPTH_COMPONENT = 0x1902\nvar GL_DEPTH_STENCIL = 0x84F9\n\nvar GL_SRGB_EXT = 0x8C40\nvar GL_SRGB_ALPHA_EXT = 0x8C42\n\nvar GL_HALF_FLOAT_OES = 0x8D61\n\nvar GL_COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0\nvar GL_COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1\nvar GL_COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2\nvar GL_COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3\n\nvar GL_COMPRESSED_RGB_ATC_WEBGL = 0x8C92\nvar GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL = 0x8C93\nvar GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL = 0x87EE\n\nvar GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00\nvar GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG = 0x8C01\nvar GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02\nvar GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03\n\nvar GL_COMPRESSED_RGB_ETC1_WEBGL = 0x8D64\n\nvar GL_UNSIGNED_BYTE = 0x1401\nvar GL_UNSIGNED_SHORT = 0x1403\nvar GL_UNSIGNED_INT = 0x1405\nvar GL_FLOAT = 0x1406\n\nvar GL_TEXTURE_WRAP_S = 0x2802\nvar GL_TEXTURE_WRAP_T = 0x2803\n\nvar GL_REPEAT = 0x2901\nvar GL_CLAMP_TO_EDGE = 0x812F\nvar GL_MIRRORED_REPEAT = 0x8370\n\nvar GL_TEXTURE_MAG_FILTER = 0x2800\nvar GL_TEXTURE_MIN_FILTER = 0x2801\n\nvar GL_NEAREST = 0x2600\nvar GL_LINEAR = 0x2601\nvar GL_NEAREST_MIPMAP_NEAREST = 0x2700\nvar GL_LINEAR_MIPMAP_NEAREST = 0x2701\nvar GL_NEAREST_MIPMAP_LINEAR = 0x2702\nvar GL_LINEAR_MIPMAP_LINEAR = 0x2703\n\nvar GL_GENERATE_MIPMAP_HINT = 0x8192\nvar GL_DONT_CARE = 0x1100\nvar GL_FASTEST = 0x1101\nvar GL_NICEST = 0x1102\n\nvar GL_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE\n\nvar GL_UNPACK_ALIGNMENT = 0x0CF5\nvar GL_UNPACK_FLIP_Y_WEBGL = 0x9240\nvar GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241\nvar GL_UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243\n\nvar GL_BROWSER_DEFAULT_WEBGL = 0x9244\n\nvar GL_TEXTURE0 = 0x84C0\n\nvar MIPMAP_FILTERS = [\n  GL_NEAREST_MIPMAP_NEAREST,\n  GL_NEAREST_MIPMAP_LINEAR,\n  GL_LINEAR_MIPMAP_NEAREST,\n  GL_LINEAR_MIPMAP_LINEAR\n]\n\nvar CHANNELS_FORMAT = [\n  0,\n  GL_LUMINANCE,\n  GL_LUMINANCE_ALPHA,\n  GL_RGB,\n  GL_RGBA\n]\n\nvar FORMAT_CHANNELS = {}\nFORMAT_CHANNELS[GL_LUMINANCE] =\nFORMAT_CHANNELS[GL_ALPHA] =\nFORMAT_CHANNELS[GL_DEPTH_COMPONENT] = 1\nFORMAT_CHANNELS[GL_DEPTH_STENCIL] =\nFORMAT_CHANNELS[GL_LUMINANCE_ALPHA] = 2\nFORMAT_CHANNELS[GL_RGB] =\nFORMAT_CHANNELS[GL_SRGB_EXT] = 3\nFORMAT_CHANNELS[GL_RGBA] =\nFORMAT_CHANNELS[GL_SRGB_ALPHA_EXT] = 4\n\nvar formatTypes = {}\nformatTypes[GL_RGBA4] = GL_UNSIGNED_SHORT_4_4_4_4\nformatTypes[GL_RGB565] = GL_UNSIGNED_SHORT_5_6_5\nformatTypes[GL_RGB5_A1] = GL_UNSIGNED_SHORT_5_5_5_1\nformatTypes[GL_DEPTH_COMPONENT] = GL_UNSIGNED_INT\nformatTypes[GL_DEPTH_STENCIL] = GL_UNSIGNED_INT_24_8_WEBGL\n\nfunction objectName (str) {\n  return '[object ' + str + ']'\n}\n\nvar CANVAS_CLASS = objectName('HTMLCanvasElement')\nvar CONTEXT2D_CLASS = objectName('CanvasRenderingContext2D')\nvar IMAGE_CLASS = objectName('HTMLImageElement')\nvar VIDEO_CLASS = objectName('HTMLVideoElement')\n\nvar PIXEL_CLASSES = Object.keys(dtypes).concat([\n  CANVAS_CLASS,\n  CONTEXT2D_CLASS,\n  IMAGE_CLASS,\n  VIDEO_CLASS\n])\n\n// for every texture type, store\n// the size in bytes.\nvar TYPE_SIZES = []\nTYPE_SIZES[GL_UNSIGNED_BYTE] = 1\nTYPE_SIZES[GL_FLOAT] = 4\nTYPE_SIZES[GL_HALF_FLOAT_OES] = 2\n\nTYPE_SIZES[GL_UNSIGNED_SHORT] = 2\nTYPE_SIZES[GL_UNSIGNED_INT] = 4\n\nvar FORMAT_SIZES_SPECIAL = []\nFORMAT_SIZES_SPECIAL[GL_RGBA4] = 2\nFORMAT_SIZES_SPECIAL[GL_RGB5_A1] = 2\nFORMAT_SIZES_SPECIAL[GL_RGB565] = 2\nFORMAT_SIZES_SPECIAL[GL_DEPTH_STENCIL] = 4\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_S3TC_DXT1_EXT] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT1_EXT] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT3_EXT] = 1\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_S3TC_DXT5_EXT] = 1\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ATC_WEBGL] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL] = 1\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL] = 1\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG] = 0.25\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG] = 0.5\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG] = 0.25\n\nFORMAT_SIZES_SPECIAL[GL_COMPRESSED_RGB_ETC1_WEBGL] = 0.5\n\nfunction isNumericArray (arr) {\n  return (\n    Array.isArray(arr) &&\n    (arr.length === 0 ||\n    typeof arr[0] === 'number'))\n}\n\nfunction isRectArray (arr) {\n  if (!Array.isArray(arr)) {\n    return false\n  }\n  var width = arr.length\n  if (width === 0 || !isArrayLike(arr[0])) {\n    return false\n  }\n  return true\n}\n\nfunction classString (x) {\n  return Object.prototype.toString.call(x)\n}\n\nfunction isCanvasElement (object) {\n  return classString(object) === CANVAS_CLASS\n}\n\nfunction isContext2D (object) {\n  return classString(object) === CONTEXT2D_CLASS\n}\n\nfunction isImageElement (object) {\n  return classString(object) === IMAGE_CLASS\n}\n\nfunction isVideoElement (object) {\n  return classString(object) === VIDEO_CLASS\n}\n\nfunction isPixelData (object) {\n  if (!object) {\n    return false\n  }\n  var className = classString(object)\n  if (PIXEL_CLASSES.indexOf(className) >= 0) {\n    return true\n  }\n  return (\n    isNumericArray(object) ||\n    isRectArray(object) ||\n    isNDArrayLike(object))\n}\n\nfunction typedArrayCode (data) {\n  return arrayTypes[Object.prototype.toString.call(data)] | 0\n}\n\nfunction convertData (result, data) {\n  var n = result.width * result.height * result.channels\n  check(data.length === n, 'inconsistent array length for texture. Expected: ' + n + '. Was: ' + data.length)\n\n  switch (result.type) {\n    case GL_UNSIGNED_BYTE:\n    case GL_UNSIGNED_SHORT:\n    case GL_UNSIGNED_INT:\n    case GL_FLOAT:\n      var converted = pool.allocType(result.type, n)\n      converted.set(data)\n      result.data = converted\n      break\n\n    case GL_HALF_FLOAT_OES:\n      result.data = convertToHalfFloat(data)\n      break\n\n    default:\n      check.raise('unsupported texture type, must specify a typed array')\n  }\n}\n\nfunction preConvert (image, n) {\n  return pool.allocType(\n    image.type === GL_HALF_FLOAT_OES\n      ? GL_FLOAT\n      : image.type, n)\n}\n\nfunction postConvert (image, data) {\n  if (image.type === GL_HALF_FLOAT_OES) {\n    image.data = convertToHalfFloat(data)\n    pool.freeType(data)\n  } else {\n    image.data = data\n  }\n}\n\nfunction transposeData (image, array, strideX, strideY, strideC, offset) {\n  var w = image.width\n  var h = image.height\n  var c = image.channels\n  var n = w * h * c\n  var data = preConvert(image, n)\n\n  var p = 0\n  for (var i = 0; i < h; ++i) {\n    for (var j = 0; j < w; ++j) {\n      for (var k = 0; k < c; ++k) {\n        data[p++] = array[strideX * j + strideY * i + strideC * k + offset]\n      }\n    }\n  }\n\n  postConvert(image, data)\n}\n\nfunction flatten2DData (image, array, w, h) {\n  var n = w * h\n  var data = preConvert(image, n)\n\n  var p = 0\n  for (var i = 0; i < h; ++i) {\n    var row = array[i]\n    for (var j = 0; j < w; ++j) {\n      data[p++] = row[j]\n    }\n  }\n\n  postConvert(image, data)\n}\n\nfunction flatten3DData (image, array, w, h, c) {\n  var n = w * h * c\n  var data = preConvert(image, n)\n\n  var p = 0\n  for (var i = 0; i < h; ++i) {\n    var row = array[i]\n    for (var j = 0; j < w; ++j) {\n      var pixel = row[j]\n      for (var k = 0; k < c; ++k) {\n        data[p++] = pixel[k]\n      }\n    }\n  }\n\n  postConvert(image, data)\n}\n\nfunction getTextureSize (format, type, width, height, isMipmap, isCube) {\n  var s\n  if (typeof FORMAT_SIZES_SPECIAL[format] !== 'undefined') {\n    // we have a special array for dealing with weird color formats such as RGB5A1\n    s = FORMAT_SIZES_SPECIAL[format]\n  } else {\n    s = FORMAT_CHANNELS[format] * TYPE_SIZES[type]\n  }\n\n  if (isCube) {\n    s *= 6\n  }\n\n  if (isMipmap) {\n    // compute the total size of all the mipmaps.\n    var total = 0\n\n    var w = width\n    while (w >= 1) {\n      // we can only use mipmaps on a square image,\n      // so we can simply use the width and ignore the height:\n      total += s * w * w\n      w /= 2\n    }\n    return total\n  } else {\n    return s * width * height\n  }\n}\n\nmodule.exports = function createTextureSet (\n  gl, extensions, limits, reglPoll, contextState, stats, config) {\n  // -------------------------------------------------------\n  // Initialize constants and parameter tables here\n  // -------------------------------------------------------\n  var mipmapHint = {\n    \"don't care\": GL_DONT_CARE,\n    'dont care': GL_DONT_CARE,\n    'nice': GL_NICEST,\n    'fast': GL_FASTEST\n  }\n\n  var wrapModes = {\n    'repeat': GL_REPEAT,\n    'clamp': GL_CLAMP_TO_EDGE,\n    'mirror': GL_MIRRORED_REPEAT\n  }\n\n  var magFilters = {\n    'nearest': GL_NEAREST,\n    'linear': GL_LINEAR\n  }\n\n  var minFilters = extend({\n    'mipmap': GL_LINEAR_MIPMAP_LINEAR,\n    'nearest mipmap nearest': GL_NEAREST_MIPMAP_NEAREST,\n    'linear mipmap nearest': GL_LINEAR_MIPMAP_NEAREST,\n    'nearest mipmap linear': GL_NEAREST_MIPMAP_LINEAR,\n    'linear mipmap linear': GL_LINEAR_MIPMAP_LINEAR\n  }, magFilters)\n\n  var colorSpace = {\n    'none': 0,\n    'browser': GL_BROWSER_DEFAULT_WEBGL\n  }\n\n  var textureTypes = {\n    'uint8': GL_UNSIGNED_BYTE,\n    'rgba4': GL_UNSIGNED_SHORT_4_4_4_4,\n    'rgb565': GL_UNSIGNED_SHORT_5_6_5,\n    'rgb5 a1': GL_UNSIGNED_SHORT_5_5_5_1\n  }\n\n  var textureFormats = {\n    'alpha': GL_ALPHA,\n    'luminance': GL_LUMINANCE,\n    'luminance alpha': GL_LUMINANCE_ALPHA,\n    'rgb': GL_RGB,\n    'rgba': GL_RGBA,\n    'rgba4': GL_RGBA4,\n    'rgb5 a1': GL_RGB5_A1,\n    'rgb565': GL_RGB565\n  }\n\n  var compressedTextureFormats = {}\n\n  if (extensions.ext_srgb) {\n    textureFormats.srgb = GL_SRGB_EXT\n    textureFormats.srgba = GL_SRGB_ALPHA_EXT\n  }\n\n  if (extensions.oes_texture_float) {\n    textureTypes.float32 = textureTypes.float = GL_FLOAT\n  }\n\n  if (extensions.oes_texture_half_float) {\n    textureTypes['float16'] = textureTypes['half float'] = GL_HALF_FLOAT_OES\n  }\n\n  if (extensions.webgl_depth_texture) {\n    extend(textureFormats, {\n      'depth': GL_DEPTH_COMPONENT,\n      'depth stencil': GL_DEPTH_STENCIL\n    })\n\n    extend(textureTypes, {\n      'uint16': GL_UNSIGNED_SHORT,\n      'uint32': GL_UNSIGNED_INT,\n      'depth stencil': GL_UNSIGNED_INT_24_8_WEBGL\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_s3tc) {\n    extend(compressedTextureFormats, {\n      'rgb s3tc dxt1': GL_COMPRESSED_RGB_S3TC_DXT1_EXT,\n      'rgba s3tc dxt1': GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,\n      'rgba s3tc dxt3': GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,\n      'rgba s3tc dxt5': GL_COMPRESSED_RGBA_S3TC_DXT5_EXT\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_atc) {\n    extend(compressedTextureFormats, {\n      'rgb atc': GL_COMPRESSED_RGB_ATC_WEBGL,\n      'rgba atc explicit alpha': GL_COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL,\n      'rgba atc interpolated alpha': GL_COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_pvrtc) {\n    extend(compressedTextureFormats, {\n      'rgb pvrtc 4bppv1': GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG,\n      'rgb pvrtc 2bppv1': GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG,\n      'rgba pvrtc 4bppv1': GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG,\n      'rgba pvrtc 2bppv1': GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG\n    })\n  }\n\n  if (extensions.webgl_compressed_texture_etc1) {\n    compressedTextureFormats['rgb etc1'] = GL_COMPRESSED_RGB_ETC1_WEBGL\n  }\n\n  // Copy over all texture formats\n  var supportedCompressedFormats = Array.prototype.slice.call(\n    gl.getParameter(GL_COMPRESSED_TEXTURE_FORMATS))\n  Object.keys(compressedTextureFormats).forEach(function (name) {\n    var format = compressedTextureFormats[name]\n    if (supportedCompressedFormats.indexOf(format) >= 0) {\n      textureFormats[name] = format\n    }\n  })\n\n  var supportedFormats = Object.keys(textureFormats)\n  limits.textureFormats = supportedFormats\n\n  // associate with every format string its\n  // corresponding GL-value.\n  var textureFormatsInvert = []\n  Object.keys(textureFormats).forEach(function (key) {\n    var val = textureFormats[key]\n    textureFormatsInvert[val] = key\n  })\n\n  // associate with every type string its\n  // corresponding GL-value.\n  var textureTypesInvert = []\n  Object.keys(textureTypes).forEach(function (key) {\n    var val = textureTypes[key]\n    textureTypesInvert[val] = key\n  })\n\n  var magFiltersInvert = []\n  Object.keys(magFilters).forEach(function (key) {\n    var val = magFilters[key]\n    magFiltersInvert[val] = key\n  })\n\n  var minFiltersInvert = []\n  Object.keys(minFilters).forEach(function (key) {\n    var val = minFilters[key]\n    minFiltersInvert[val] = key\n  })\n\n  var wrapModesInvert = []\n  Object.keys(wrapModes).forEach(function (key) {\n    var val = wrapModes[key]\n    wrapModesInvert[val] = key\n  })\n\n  // colorFormats[] gives the format (channels) associated to an\n  // internalformat\n  var colorFormats = supportedFormats.reduce(function (color, key) {\n    var glenum = textureFormats[key]\n    if (glenum === GL_LUMINANCE ||\n        glenum === GL_ALPHA ||\n        glenum === GL_LUMINANCE ||\n        glenum === GL_LUMINANCE_ALPHA ||\n        glenum === GL_DEPTH_COMPONENT ||\n        glenum === GL_DEPTH_STENCIL) {\n      color[glenum] = glenum\n    } else if (glenum === GL_RGB5_A1 || key.indexOf('rgba') >= 0) {\n      color[glenum] = GL_RGBA\n    } else {\n      color[glenum] = GL_RGB\n    }\n    return color\n  }, {})\n\n  function TexFlags () {\n    // format info\n    this.internalformat = GL_RGBA\n    this.format = GL_RGBA\n    this.type = GL_UNSIGNED_BYTE\n    this.compressed = false\n\n    // pixel storage\n    this.premultiplyAlpha = false\n    this.flipY = false\n    this.unpackAlignment = 1\n    this.colorSpace = 0\n\n    // shape info\n    this.width = 0\n    this.height = 0\n    this.channels = 4\n  }\n\n  function copyFlags (result, other) {\n    result.internalformat = other.internalformat\n    result.format = other.format\n    result.type = other.type\n    result.compressed = other.compressed\n\n    result.premultiplyAlpha = other.premultiplyAlpha\n    result.flipY = other.flipY\n    result.unpackAlignment = other.unpackAlignment\n    result.colorSpace = other.colorSpace\n\n    result.width = other.width\n    result.height = other.height\n    result.channels = other.channels\n  }\n\n  function parseFlags (flags, options) {\n    if (typeof options !== 'object' || !options) {\n      return\n    }\n\n    if ('premultiplyAlpha' in options) {\n      check.type(options.premultiplyAlpha, 'boolean',\n        'invalid premultiplyAlpha')\n      flags.premultiplyAlpha = options.premultiplyAlpha\n    }\n\n    if ('flipY' in options) {\n      check.type(options.flipY, 'boolean',\n        'invalid texture flip')\n      flags.flipY = options.flipY\n    }\n\n    if ('alignment' in options) {\n      check.oneOf(options.alignment, [1, 2, 4, 8],\n        'invalid texture unpack alignment')\n      flags.unpackAlignment = options.alignment\n    }\n\n    if ('colorSpace' in options) {\n      check.parameter(options.colorSpace, colorSpace,\n        'invalid colorSpace')\n      flags.colorSpace = colorSpace[options.colorSpace]\n    }\n\n    if ('type' in options) {\n      var type = options.type\n      check(extensions.oes_texture_float ||\n        !(type === 'float' || type === 'float32'),\n        'you must enable the OES_texture_float extension in order to use floating point textures.')\n      check(extensions.oes_texture_half_float ||\n        !(type === 'half float' || type === 'float16'),\n        'you must enable the OES_texture_half_float extension in order to use 16-bit floating point textures.')\n      check(extensions.webgl_depth_texture ||\n        !(type === 'depth' || type === 'depth stencil'),\n        'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')\n      check.parameter(type, textureTypes,\n        'invalid texture type')\n      flags.type = textureTypes[type]\n    }\n\n    var w = flags.width\n    var h = flags.height\n    var c = flags.channels\n    var hasChannels = false\n    if ('shape' in options) {\n      check(Array.isArray(options.shape) && options.shape.length >= 2,\n        'shape must be an array')\n      w = options.shape[0]\n      h = options.shape[1]\n      if (options.shape.length === 3) {\n        c = options.shape[2]\n        check(c > 0 && c <= 4, 'invalid number of channels')\n        hasChannels = true\n      }\n      check(w >= 0 && w <= limits.maxTextureSize, 'invalid width')\n      check(h >= 0 && h <= limits.maxTextureSize, 'invalid height')\n    } else {\n      if ('radius' in options) {\n        w = h = options.radius\n        check(w >= 0 && w <= limits.maxTextureSize, 'invalid radius')\n      }\n      if ('width' in options) {\n        w = options.width\n        check(w >= 0 && w <= limits.maxTextureSize, 'invalid width')\n      }\n      if ('height' in options) {\n        h = options.height\n        check(h >= 0 && h <= limits.maxTextureSize, 'invalid height')\n      }\n      if ('channels' in options) {\n        c = options.channels\n        check(c > 0 && c <= 4, 'invalid number of channels')\n        hasChannels = true\n      }\n    }\n    flags.width = w | 0\n    flags.height = h | 0\n    flags.channels = c | 0\n\n    var hasFormat = false\n    if ('format' in options) {\n      var formatStr = options.format\n      check(extensions.webgl_depth_texture ||\n        !(formatStr === 'depth' || formatStr === 'depth stencil'),\n        'you must enable the WEBGL_depth_texture extension in order to use depth/stencil textures.')\n      check.parameter(formatStr, textureFormats,\n        'invalid texture format')\n      var internalformat = flags.internalformat = textureFormats[formatStr]\n      flags.format = colorFormats[internalformat]\n      if (formatStr in textureTypes) {\n        if (!('type' in options)) {\n          flags.type = textureTypes[formatStr]\n        }\n      }\n      if (formatStr in compressedTextureFormats) {\n        flags.compressed = true\n      }\n      hasFormat = true\n    }\n\n    // Reconcile channels and format\n    if (!hasChannels && hasFormat) {\n      flags.channels = FORMAT_CHANNELS[flags.format]\n    } else if (hasChannels && !hasFormat) {\n      if (flags.channels !== CHANNELS_FORMAT[flags.format]) {\n        flags.format = flags.internalformat = CHANNELS_FORMAT[flags.channels]\n      }\n    } else if (hasFormat && hasChannels) {\n      check(\n        flags.channels === FORMAT_CHANNELS[flags.format],\n        'number of channels inconsistent with specified format')\n    }\n  }\n\n  function setFlags (flags) {\n    gl.pixelStorei(GL_UNPACK_FLIP_Y_WEBGL, flags.flipY)\n    gl.pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_WEBGL, flags.premultiplyAlpha)\n    gl.pixelStorei(GL_UNPACK_COLORSPACE_CONVERSION_WEBGL, flags.colorSpace)\n    gl.pixelStorei(GL_UNPACK_ALIGNMENT, flags.unpackAlignment)\n  }\n\n  // -------------------------------------------------------\n  // Tex image data\n  // -------------------------------------------------------\n  function TexImage () {\n    TexFlags.call(this)\n\n    this.xOffset = 0\n    this.yOffset = 0\n\n    // data\n    this.data = null\n    this.needsFree = false\n\n    // html element\n    this.element = null\n\n    // copyTexImage info\n    this.needsCopy = false\n  }\n\n  function parseImage (image, options) {\n    var data = null\n    if (isPixelData(options)) {\n      data = options\n    } else if (options) {\n      check.type(options, 'object', 'invalid pixel data type')\n      parseFlags(image, options)\n      if ('x' in options) {\n        image.xOffset = options.x | 0\n      }\n      if ('y' in options) {\n        image.yOffset = options.y | 0\n      }\n      if (isPixelData(options.data)) {\n        data = options.data\n      }\n    }\n\n    check(\n      !image.compressed ||\n      data instanceof Uint8Array,\n      'compressed texture data must be stored in a uint8array')\n\n    if (options.copy) {\n      check(!data, 'can not specify copy and data field for the same texture')\n      var viewW = contextState.viewportWidth\n      var viewH = contextState.viewportHeight\n      image.width = image.width || (viewW - image.xOffset)\n      image.height = image.height || (viewH - image.yOffset)\n      image.needsCopy = true\n      check(image.xOffset >= 0 && image.xOffset < viewW &&\n            image.yOffset >= 0 && image.yOffset < viewH &&\n            image.width > 0 && image.width <= viewW &&\n            image.height > 0 && image.height <= viewH,\n            'copy texture read out of bounds')\n    } else if (!data) {\n      image.width = image.width || 1\n      image.height = image.height || 1\n    } else if (isTypedArray(data)) {\n      image.data = data\n      if (!('type' in options) && image.type === GL_UNSIGNED_BYTE) {\n        image.type = typedArrayCode(data)\n      }\n    } else if (isNumericArray(data)) {\n      convertData(image, data)\n      image.alignment = 1\n      image.needsFree = true\n    } else if (isNDArrayLike(data)) {\n      var array = data.data\n      if (!Array.isArray(array) && image.type === GL_UNSIGNED_BYTE) {\n        image.type = typedArrayCode(array)\n      }\n      var shape = data.shape\n      var stride = data.stride\n      var shapeX, shapeY, shapeC, strideX, strideY, strideC\n      if (shape.length === 3) {\n        shapeC = shape[2]\n        strideC = stride[2]\n      } else {\n        check(shape.length === 2, 'invalid ndarray pixel data, must be 2 or 3D')\n        shapeC = 1\n        strideC = 1\n      }\n      shapeX = shape[0]\n      shapeY = shape[1]\n      strideX = stride[0]\n      strideY = stride[1]\n      image.alignment = 1\n      image.width = shapeX\n      image.height = shapeY\n      image.channels = shapeC\n      image.format = image.internalformat = CHANNELS_FORMAT[shapeC]\n      image.needsFree = true\n      transposeData(image, array, strideX, strideY, strideC, data.offset)\n    } else if (isCanvasElement(data) || isContext2D(data)) {\n      if (isCanvasElement(data)) {\n        image.element = data\n      } else {\n        image.element = data.canvas\n      }\n      image.width = image.element.width\n      image.height = image.element.height\n    } else if (isImageElement(data)) {\n      image.element = data\n      image.width = data.naturalWidth\n      image.height = data.naturalHeight\n    } else if (isVideoElement(data)) {\n      image.element = data\n      image.width = data.videoWidth\n      image.height = data.videoHeight\n      image.needsPoll = true\n    } else if (isRectArray(data)) {\n      var w = data[0].length\n      var h = data.length\n      var c = 1\n      if (isArrayLike(data[0][0])) {\n        c = data[0][0].length\n        flatten3DData(image, data, w, h, c)\n      } else {\n        flatten2DData(image, data, w, h)\n      }\n      image.alignment = 1\n      image.width = w\n      image.height = h\n      image.channels = c\n      image.format = image.internalformat = CHANNELS_FORMAT[c]\n      image.needsFree = true\n    }\n\n    if (image.type === GL_FLOAT) {\n      check(limits.extensions.indexOf('oes_texture_float') >= 0,\n        'oes_texture_float extension not enabled')\n    } else if (image.type === GL_HALF_FLOAT_OES) {\n      check(limits.extensions.indexOf('oes_texture_half_float') >= 0,\n        'oes_texture_half_float extension not enabled')\n    }\n\n    // do compressed texture  validation here.\n  }\n\n  function setImage (info, target, miplevel) {\n    var element = info.element\n    var data = info.data\n    var internalformat = info.internalformat\n    var format = info.format\n    var type = info.type\n    var width = info.width\n    var height = info.height\n\n    setFlags(info)\n\n    if (element) {\n      gl.texImage2D(target, miplevel, format, format, type, element)\n    } else if (info.compressed) {\n      gl.compressedTexImage2D(target, miplevel, internalformat, width, height, 0, data)\n    } else if (info.needsCopy) {\n      reglPoll()\n      gl.copyTexImage2D(\n        target, miplevel, format, info.xOffset, info.yOffset, width, height, 0)\n    } else {\n      gl.texImage2D(\n        target, miplevel, format, width, height, 0, format, type, data)\n    }\n  }\n\n  function setSubImage (info, target, x, y, miplevel) {\n    var element = info.element\n    var data = info.data\n    var internalformat = info.internalformat\n    var format = info.format\n    var type = info.type\n    var width = info.width\n    var height = info.height\n\n    setFlags(info)\n\n    if (element) {\n      gl.texSubImage2D(\n        target, miplevel, x, y, format, type, element)\n    } else if (info.compressed) {\n      gl.compressedTexSubImage2D(\n        target, miplevel, x, y, internalformat, width, height, data)\n    } else if (info.needsCopy) {\n      reglPoll()\n      gl.copyTexSubImage2D(\n        target, miplevel, x, y, info.xOffset, info.yOffset, width, height)\n    } else {\n      gl.texSubImage2D(\n        target, miplevel, x, y, width, height, format, type, data)\n    }\n  }\n\n  // texImage pool\n  var imagePool = []\n\n  function allocImage () {\n    return imagePool.pop() || new TexImage()\n  }\n\n  function freeImage (image) {\n    if (image.needsFree) {\n      pool.freeType(image.data)\n    }\n    TexImage.call(image)\n    imagePool.push(image)\n  }\n\n  // -------------------------------------------------------\n  // Mip map\n  // -------------------------------------------------------\n  function MipMap () {\n    TexFlags.call(this)\n\n    this.genMipmaps = false\n    this.mipmapHint = GL_DONT_CARE\n    this.mipmask = 0\n    this.images = Array(16)\n  }\n\n  function parseMipMapFromShape (mipmap, width, height) {\n    var img = mipmap.images[0] = allocImage()\n    mipmap.mipmask = 1\n    img.width = mipmap.width = width\n    img.height = mipmap.height = height\n  }\n\n  function parseMipMapFromObject (mipmap, options) {\n    var imgData = null\n    if (isPixelData(options)) {\n      imgData = mipmap.images[0] = allocImage()\n      copyFlags(imgData, mipmap)\n      parseImage(imgData, options)\n      mipmap.mipmask = 1\n    } else {\n      parseFlags(mipmap, options)\n      if (Array.isArray(options.mipmap)) {\n        var mipData = options.mipmap\n        for (var i = 0; i < mipData.length; ++i) {\n          imgData = mipmap.images[i] = allocImage()\n          copyFlags(imgData, mipmap)\n          imgData.width >>= i\n          imgData.height >>= i\n          parseImage(imgData, mipData[i])\n          mipmap.mipmask |= (1 << i)\n        }\n      } else {\n        imgData = mipmap.images[0] = allocImage()\n        copyFlags(imgData, mipmap)\n        parseImage(imgData, options)\n        mipmap.mipmask = 1\n      }\n    }\n    copyFlags(mipmap, mipmap.images[0])\n\n    // For textures of the compressed format WEBGL_compressed_texture_s3tc\n    // we must have that\n    //\n    // \"When level equals zero width and height must be a multiple of 4.\n    // When level is greater than 0 width and height must be 0, 1, 2 or a multiple of 4. \"\n    //\n    // but we do not yet support having multiple mipmap levels for compressed textures,\n    // so we only test for level zero.\n\n    if (mipmap.compressed &&\n        (mipmap.internalformat === GL_COMPRESSED_RGB_S3TC_DXT1_EXT) ||\n        (mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) ||\n        (mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT3_EXT) ||\n        (mipmap.internalformat === GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)) {\n      check(mipmap.width % 4 === 0 &&\n            mipmap.height % 4 === 0,\n            'for compressed texture formats, mipmap level 0 must have width and height that are a multiple of 4')\n    }\n  }\n\n  function setMipMap (mipmap, target) {\n    var images = mipmap.images\n    for (var i = 0; i < images.length; ++i) {\n      if (!images[i]) {\n        return\n      }\n      setImage(images[i], target, i)\n    }\n  }\n\n  var mipPool = []\n\n  function allocMipMap () {\n    var result = mipPool.pop() || new MipMap()\n    TexFlags.call(result)\n    result.mipmask = 0\n    for (var i = 0; i < 16; ++i) {\n      result.images[i] = null\n    }\n    return result\n  }\n\n  function freeMipMap (mipmap) {\n    var images = mipmap.images\n    for (var i = 0; i < images.length; ++i) {\n      if (images[i]) {\n        freeImage(images[i])\n      }\n      images[i] = null\n    }\n    mipPool.push(mipmap)\n  }\n\n  // -------------------------------------------------------\n  // Tex info\n  // -------------------------------------------------------\n  function TexInfo () {\n    this.minFilter = GL_NEAREST\n    this.magFilter = GL_NEAREST\n\n    this.wrapS = GL_CLAMP_TO_EDGE\n    this.wrapT = GL_CLAMP_TO_EDGE\n\n    this.anisotropic = 1\n\n    this.genMipmaps = false\n    this.mipmapHint = GL_DONT_CARE\n  }\n\n  function parseTexInfo (info, options) {\n    if ('min' in options) {\n      var minFilter = options.min\n      check.parameter(minFilter, minFilters)\n      info.minFilter = minFilters[minFilter]\n      if (MIPMAP_FILTERS.indexOf(info.minFilter) >= 0) {\n        info.genMipmaps = true\n      }\n    }\n\n    if ('mag' in options) {\n      var magFilter = options.mag\n      check.parameter(magFilter, magFilters)\n      info.magFilter = magFilters[magFilter]\n    }\n\n    var wrapS = info.wrapS\n    var wrapT = info.wrapT\n    if ('wrap' in options) {\n      var wrap = options.wrap\n      if (typeof wrap === 'string') {\n        check.parameter(wrap, wrapModes)\n        wrapS = wrapT = wrapModes[wrap]\n      } else if (Array.isArray(wrap)) {\n        check.parameter(wrap[0], wrapModes)\n        check.parameter(wrap[1], wrapModes)\n        wrapS = wrapModes[wrap[0]]\n        wrapT = wrapModes[wrap[1]]\n      }\n    } else {\n      if ('wrapS' in options) {\n        var optWrapS = options.wrapS\n        check.parameter(optWrapS, wrapModes)\n        wrapS = wrapModes[optWrapS]\n      }\n      if ('wrapT' in options) {\n        var optWrapT = options.wrapT\n        check.parameter(optWrapT, wrapModes)\n        wrapT = wrapModes[optWrapT]\n      }\n    }\n    info.wrapS = wrapS\n    info.wrapT = wrapT\n\n    if ('anisotropic' in options) {\n      var anisotropic = options.anisotropic\n      check(typeof anisotropic === 'number' &&\n         anisotropic >= 1 && anisotropic <= limits.maxAnisotropic,\n        'aniso samples must be between 1 and ')\n      info.anisotropic = options.anisotropic\n    }\n\n    if ('mipmap' in options) {\n      var hasMipMap = false\n      switch (typeof options.mipmap) {\n        case 'string':\n          check.parameter(options.mipmap, mipmapHint,\n            'invalid mipmap hint')\n          info.mipmapHint = mipmapHint[options.mipmap]\n          info.genMipmaps = true\n          hasMipMap = true\n          break\n\n        case 'boolean':\n          hasMipMap = info.genMipmaps = options.mipmap\n          break\n\n        case 'object':\n          check(Array.isArray(options.mipmap), 'invalid mipmap type')\n          info.genMipmaps = false\n          hasMipMap = true\n          break\n\n        default:\n          check.raise('invalid mipmap type')\n      }\n      if (hasMipMap && !('min' in options)) {\n        info.minFilter = GL_NEAREST_MIPMAP_NEAREST\n      }\n    }\n  }\n\n  function setTexInfo (info, target) {\n    gl.texParameteri(target, GL_TEXTURE_MIN_FILTER, info.minFilter)\n    gl.texParameteri(target, GL_TEXTURE_MAG_FILTER, info.magFilter)\n    gl.texParameteri(target, GL_TEXTURE_WRAP_S, info.wrapS)\n    gl.texParameteri(target, GL_TEXTURE_WRAP_T, info.wrapT)\n    if (extensions.ext_texture_filter_anisotropic) {\n      gl.texParameteri(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, info.anisotropic)\n    }\n    if (info.genMipmaps) {\n      gl.hint(GL_GENERATE_MIPMAP_HINT, info.mipmapHint)\n      gl.generateMipmap(target)\n    }\n  }\n\n  // -------------------------------------------------------\n  // Full texture object\n  // -------------------------------------------------------\n  var textureCount = 0\n  var textureSet = {}\n  var numTexUnits = limits.maxTextureUnits\n  var textureUnits = Array(numTexUnits).map(function () {\n    return null\n  })\n\n  function REGLTexture (target) {\n    TexFlags.call(this)\n    this.mipmask = 0\n    this.internalformat = GL_RGBA\n\n    this.id = textureCount++\n\n    this.refCount = 1\n\n    this.target = target\n    this.texture = gl.createTexture()\n\n    this.unit = -1\n    this.bindCount = 0\n\n    this.texInfo = new TexInfo()\n\n    if (config.profile) {\n      this.stats = {size: 0}\n    }\n  }\n\n  function tempBind (texture) {\n    gl.activeTexture(GL_TEXTURE0)\n    gl.bindTexture(texture.target, texture.texture)\n  }\n\n  function tempRestore () {\n    var prev = textureUnits[0]\n    if (prev) {\n      gl.bindTexture(prev.target, prev.texture)\n    } else {\n      gl.bindTexture(GL_TEXTURE_2D, null)\n    }\n  }\n\n  function destroy (texture) {\n    var handle = texture.texture\n    check(handle, 'must not double destroy texture')\n    var unit = texture.unit\n    var target = texture.target\n    if (unit >= 0) {\n      gl.activeTexture(GL_TEXTURE0 + unit)\n      gl.bindTexture(target, null)\n      textureUnits[unit] = null\n    }\n    gl.deleteTexture(handle)\n    texture.texture = null\n    texture.params = null\n    texture.pixels = null\n    texture.refCount = 0\n    delete textureSet[texture.id]\n    stats.textureCount--\n  }\n\n  extend(REGLTexture.prototype, {\n    bind: function () {\n      var texture = this\n      texture.bindCount += 1\n      var unit = texture.unit\n      if (unit < 0) {\n        for (var i = 0; i < numTexUnits; ++i) {\n          var other = textureUnits[i]\n          if (other) {\n            if (other.bindCount > 0) {\n              continue\n            }\n            other.unit = -1\n          }\n          textureUnits[i] = texture\n          unit = i\n          break\n        }\n        if (unit >= numTexUnits) {\n          check.raise('insufficient number of texture units')\n        }\n        if (config.profile && stats.maxTextureUnits < (unit + 1)) {\n          stats.maxTextureUnits = unit + 1 // +1, since the units are zero-based\n        }\n        texture.unit = unit\n        gl.activeTexture(GL_TEXTURE0 + unit)\n        gl.bindTexture(texture.target, texture.texture)\n      }\n      return unit\n    },\n\n    unbind: function () {\n      this.bindCount -= 1\n    },\n\n    decRef: function () {\n      if (--this.refCount <= 0) {\n        destroy(this)\n      }\n    }\n  })\n\n  function createTexture2D (a, b) {\n    var texture = new REGLTexture(GL_TEXTURE_2D)\n    textureSet[texture.id] = texture\n    stats.textureCount++\n\n    function reglTexture2D (a, b) {\n      var texInfo = texture.texInfo\n      TexInfo.call(texInfo)\n      var mipData = allocMipMap()\n\n      if (typeof a === 'number') {\n        if (typeof b === 'number') {\n          parseMipMapFromShape(mipData, a | 0, b | 0)\n        } else {\n          parseMipMapFromShape(mipData, a | 0, a | 0)\n        }\n      } else if (a) {\n        check.type(a, 'object', 'invalid arguments to regl.texture')\n        parseTexInfo(texInfo, a)\n        parseMipMapFromObject(mipData, a)\n      } else {\n        // empty textures get assigned a default shape of 1x1\n        parseMipMapFromShape(mipData, 1, 1)\n      }\n\n      if (texInfo.genMipmaps) {\n        mipData.mipmask = (mipData.width << 1) - 1\n      }\n      texture.mipmask = mipData.mipmask\n\n      copyFlags(texture, mipData)\n\n      check.texture2D(texInfo, mipData, limits)\n      texture.internalformat = mipData.internalformat\n\n      reglTexture2D.width = mipData.width\n      reglTexture2D.height = mipData.height\n\n      tempBind(texture)\n      setMipMap(mipData, GL_TEXTURE_2D)\n      setTexInfo(texInfo, GL_TEXTURE_2D)\n      tempRestore()\n\n      freeMipMap(mipData)\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          mipData.width,\n          mipData.height,\n          texInfo.genMipmaps,\n          false)\n      }\n      reglTexture2D.format = textureFormatsInvert[texture.internalformat]\n      reglTexture2D.type = textureTypesInvert[texture.type]\n\n      reglTexture2D.mag = magFiltersInvert[texInfo.magFilter]\n      reglTexture2D.min = minFiltersInvert[texInfo.minFilter]\n\n      reglTexture2D.wrapS = wrapModesInvert[texInfo.wrapS]\n      reglTexture2D.wrapT = wrapModesInvert[texInfo.wrapT]\n\n      return reglTexture2D\n    }\n\n    function subimage (image, x_, y_, level_) {\n      check(!!image, 'must specify image data')\n\n      var x = x_ | 0\n      var y = y_ | 0\n      var level = level_ | 0\n\n      var imageData = allocImage()\n      copyFlags(imageData, texture)\n      imageData.width >>= level\n      imageData.height >>= level\n      imageData.width -= x\n      imageData.height -= y\n      parseImage(imageData, image)\n\n      check(\n        texture.type === imageData.type &&\n        texture.format === imageData.format &&\n        texture.internalformat === imageData.internalformat,\n        'incompatible format for texture.subimage')\n      check(\n        x >= 0 && y >= 0 &&\n        x + imageData.width <= texture.width &&\n        y + imageData.height <= texture.height,\n        'texture.subimage write out of bounds')\n      check(\n        texture.mipmask & (1 << level),\n        'missing mipmap data')\n      check(\n        imageData.data || imageData.element || imageData.needsCopy,\n        'missing image data')\n\n      tempBind(texture)\n      setSubImage(imageData, GL_TEXTURE_2D, x, y, level)\n      tempRestore()\n\n      freeImage(imageData)\n\n      return reglTexture2D\n    }\n\n    function resize (w_, h_) {\n      var w = w_ | 0\n      var h = (h_ | 0) || w\n      if (w === texture.width && h === texture.height) {\n        return reglTexture2D\n      }\n\n      reglTexture2D.width = texture.width = w\n      reglTexture2D.height = texture.height = h\n\n      tempBind(texture)\n      for (var i = 0; texture.mipmask >> i; ++i) {\n        gl.texImage2D(\n          GL_TEXTURE_2D,\n          i,\n          texture.format,\n          w >> i,\n          h >> i,\n          0,\n          texture.format,\n          texture.type,\n          null)\n      }\n      tempRestore()\n\n      // also, recompute the texture size.\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          w,\n          h,\n          false,\n          false)\n      }\n\n      return reglTexture2D\n    }\n\n    reglTexture2D(a, b)\n\n    reglTexture2D.subimage = subimage\n    reglTexture2D.resize = resize\n    reglTexture2D._reglType = 'texture2d'\n    reglTexture2D._texture = texture\n    if (config.profile) {\n      reglTexture2D.stats = texture.stats\n    }\n    reglTexture2D.destroy = function () {\n      texture.decRef()\n    }\n\n    return reglTexture2D\n  }\n\n  function createTextureCube (a0, a1, a2, a3, a4, a5) {\n    var texture = new REGLTexture(GL_TEXTURE_CUBE_MAP)\n    textureSet[texture.id] = texture\n    stats.cubeCount++\n\n    var faces = new Array(6)\n\n    function reglTextureCube (a0, a1, a2, a3, a4, a5) {\n      var i\n      var texInfo = texture.texInfo\n      TexInfo.call(texInfo)\n      for (i = 0; i < 6; ++i) {\n        faces[i] = allocMipMap()\n      }\n\n      if (typeof a0 === 'number' || !a0) {\n        var s = (a0 | 0) || 1\n        for (i = 0; i < 6; ++i) {\n          parseMipMapFromShape(faces[i], s, s)\n        }\n      } else if (typeof a0 === 'object') {\n        if (a1) {\n          parseMipMapFromObject(faces[0], a0)\n          parseMipMapFromObject(faces[1], a1)\n          parseMipMapFromObject(faces[2], a2)\n          parseMipMapFromObject(faces[3], a3)\n          parseMipMapFromObject(faces[4], a4)\n          parseMipMapFromObject(faces[5], a5)\n        } else {\n          parseTexInfo(texInfo, a0)\n          parseFlags(texture, a0)\n          if ('faces' in a0) {\n            var face_input = a0.faces\n            check(Array.isArray(face_input) && face_input.length === 6,\n              'cube faces must be a length 6 array')\n            for (i = 0; i < 6; ++i) {\n              check(typeof face_input[i] === 'object' && !!face_input[i],\n                'invalid input for cube map face')\n              copyFlags(faces[i], texture)\n              parseMipMapFromObject(faces[i], face_input[i])\n            }\n          } else {\n            for (i = 0; i < 6; ++i) {\n              parseMipMapFromObject(faces[i], a0)\n            }\n          }\n        }\n      } else {\n        check.raise('invalid arguments to cube map')\n      }\n\n      copyFlags(texture, faces[0])\n      if (texInfo.genMipmaps) {\n        texture.mipmask = (faces[0].width << 1) - 1\n      } else {\n        texture.mipmask = faces[0].mipmask\n      }\n\n      check.textureCube(texture, texInfo, faces, limits)\n      texture.internalformat = faces[0].internalformat\n\n      reglTextureCube.width = faces[0].width\n      reglTextureCube.height = faces[0].height\n\n      tempBind(texture)\n      for (i = 0; i < 6; ++i) {\n        setMipMap(faces[i], GL_TEXTURE_CUBE_MAP_POSITIVE_X + i)\n      }\n      setTexInfo(texInfo, GL_TEXTURE_CUBE_MAP)\n      tempRestore()\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          reglTextureCube.width,\n          reglTextureCube.height,\n          texInfo.genMipmaps,\n          true)\n      }\n\n      reglTextureCube.format = textureFormatsInvert[texture.internalformat]\n      reglTextureCube.type = textureTypesInvert[texture.type]\n\n      reglTextureCube.mag = magFiltersInvert[texInfo.magFilter]\n      reglTextureCube.min = minFiltersInvert[texInfo.minFilter]\n\n      reglTextureCube.wrapS = wrapModesInvert[texInfo.wrapS]\n      reglTextureCube.wrapT = wrapModesInvert[texInfo.wrapT]\n\n      for (i = 0; i < 6; ++i) {\n        freeMipMap(faces[i])\n      }\n\n      return reglTextureCube\n    }\n\n    function subimage (face, image, x_, y_, level_) {\n      check(!!image, 'must specify image data')\n      check(typeof face === 'number' && face === (face | 0) &&\n        face >= 0 && face < 6, 'invalid face')\n\n      var x = x_ | 0\n      var y = y_ | 0\n      var level = level_ | 0\n\n      var imageData = allocImage()\n      copyFlags(imageData, texture)\n      imageData.width >>= level\n      imageData.height >>= level\n      imageData.width -= x\n      imageData.height -= y\n      parseImage(imageData, image)\n\n      check(\n        texture.type === imageData.type &&\n        texture.format === imageData.format &&\n        texture.internalformat === imageData.internalformat,\n        'incompatible format for texture.subimage')\n      check(\n        x >= 0 && y >= 0 &&\n        x + imageData.width <= texture.width &&\n        y + imageData.height <= texture.height,\n        'texture.subimage write out of bounds')\n      check(\n        texture.mipmask & (1 << level),\n        'missing mipmap data')\n      check(\n        imageData.data || imageData.element || imageData.needsCopy,\n        'missing image data')\n\n      tempBind(texture)\n      setSubImage(imageData, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, x, y, level)\n      tempRestore()\n\n      freeImage(imageData)\n\n      return reglTextureCube\n    }\n\n    function resize (radius_) {\n      var radius = radius_ | 0\n      if (radius === texture.width) {\n        return\n      }\n\n      reglTextureCube.width = texture.width = radius\n      reglTextureCube.height = texture.height = radius\n\n      tempBind(texture)\n      for (var i = 0; i < 6; ++i) {\n        for (var j = 0; texture.mipmask >> j; ++j) {\n          gl.texImage2D(\n            GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,\n            j,\n            texture.format,\n            radius >> j,\n            radius >> j,\n            0,\n            texture.format,\n            texture.type,\n            null)\n        }\n      }\n      tempRestore()\n\n      if (config.profile) {\n        texture.stats.size = getTextureSize(\n          texture.internalformat,\n          texture.type,\n          reglTextureCube.width,\n          reglTextureCube.height,\n          false,\n          true)\n      }\n\n      return reglTextureCube\n    }\n\n    reglTextureCube(a0, a1, a2, a3, a4, a5)\n\n    reglTextureCube.subimage = subimage\n    reglTextureCube.resize = resize\n    reglTextureCube._reglType = 'textureCube'\n    reglTextureCube._texture = texture\n    if (config.profile) {\n      reglTextureCube.stats = texture.stats\n    }\n    reglTextureCube.destroy = function () {\n      texture.decRef()\n    }\n\n    return reglTextureCube\n  }\n\n  // Called when regl is destroyed\n  function destroyTextures () {\n    for (var i = 0; i < numTexUnits; ++i) {\n      gl.activeTexture(GL_TEXTURE0 + i)\n      gl.bindTexture(GL_TEXTURE_2D, null)\n      textureUnits[i] = null\n    }\n    values(textureSet).forEach(destroy)\n\n    stats.cubeCount = 0\n    stats.textureCount = 0\n  }\n\n  if (config.profile) {\n    stats.getTotalTextureSize = function () {\n      var total = 0\n      Object.keys(textureSet).forEach(function (key) {\n        total += textureSet[key].stats.size\n      })\n      return total\n    }\n  }\n\n  function restoreTextures () {\n    values(textureSet).forEach(function (texture) {\n      texture.texture = gl.createTexture()\n      gl.bindTexture(texture.target, texture.texture)\n      for (var i = 0; i < 32; ++i) {\n        if ((texture.mipmask & (1 << i)) === 0) {\n          continue\n        }\n        if (texture.target === GL_TEXTURE_2D) {\n          gl.texImage2D(GL_TEXTURE_2D,\n            i,\n            texture.internalformat,\n            texture.width >> i,\n            texture.height >> i,\n            0,\n            texture.internalformat,\n            texture.type,\n            null)\n        } else {\n          for (var j = 0; j < 6; ++j) {\n            gl.texImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + j,\n              i,\n              texture.internalformat,\n              texture.width >> i,\n              texture.height >> i,\n              0,\n              texture.internalformat,\n              texture.type,\n              null)\n          }\n        }\n      }\n      setTexInfo(texture.texInfo, texture.target)\n    })\n  }\n\n  return {\n    create2D: createTexture2D,\n    createCube: createTextureCube,\n    clear: destroyTextures,\n    getTexture: function (wrapper) {\n      return null\n    },\n    restore: restoreTextures\n  }\n}\n","var GL_QUERY_RESULT_EXT = 0x8866\nvar GL_QUERY_RESULT_AVAILABLE_EXT = 0x8867\nvar GL_TIME_ELAPSED_EXT = 0x88BF\n\nmodule.exports = function (gl, extensions) {\n  var extTimer = extensions.ext_disjoint_timer_query\n\n  if (!extTimer) {\n    return null\n  }\n\n  // QUERY POOL BEGIN\n  var queryPool = []\n  function allocQuery () {\n    return queryPool.pop() || extTimer.createQueryEXT()\n  }\n  function freeQuery (query) {\n    queryPool.push(query)\n  }\n  // QUERY POOL END\n\n  var pendingQueries = []\n  function beginQuery (stats) {\n    var query = allocQuery()\n    extTimer.beginQueryEXT(GL_TIME_ELAPSED_EXT, query)\n    pendingQueries.push(query)\n    pushScopeStats(pendingQueries.length - 1, pendingQueries.length, stats)\n  }\n\n  function endQuery () {\n    extTimer.endQueryEXT(GL_TIME_ELAPSED_EXT)\n  }\n\n  //\n  // Pending stats pool.\n  //\n  function PendingStats () {\n    this.startQueryIndex = -1\n    this.endQueryIndex = -1\n    this.sum = 0\n    this.stats = null\n  }\n  var pendingStatsPool = []\n  function allocPendingStats () {\n    return pendingStatsPool.pop() || new PendingStats()\n  }\n  function freePendingStats (pendingStats) {\n    pendingStatsPool.push(pendingStats)\n  }\n  // Pending stats pool end\n\n  var pendingStats = []\n  function pushScopeStats (start, end, stats) {\n    var ps = allocPendingStats()\n    ps.startQueryIndex = start\n    ps.endQueryIndex = end\n    ps.sum = 0\n    ps.stats = stats\n    pendingStats.push(ps)\n  }\n\n  // we should call this at the beginning of the frame,\n  // in order to update gpuTime\n  var timeSum = []\n  var queryPtr = []\n  function update () {\n    var ptr, i\n\n    var n = pendingQueries.length\n    if (n === 0) {\n      return\n    }\n\n    // Reserve space\n    queryPtr.length = Math.max(queryPtr.length, n + 1)\n    timeSum.length = Math.max(timeSum.length, n + 1)\n    timeSum[0] = 0\n    queryPtr[0] = 0\n\n    // Update all pending timer queries\n    var queryTime = 0\n    ptr = 0\n    for (i = 0; i < pendingQueries.length; ++i) {\n      var query = pendingQueries[i]\n      if (extTimer.getQueryObjectEXT(query, GL_QUERY_RESULT_AVAILABLE_EXT)) {\n        queryTime += extTimer.getQueryObjectEXT(query, GL_QUERY_RESULT_EXT)\n        freeQuery(query)\n      } else {\n        pendingQueries[ptr++] = query\n      }\n      timeSum[i + 1] = queryTime\n      queryPtr[i + 1] = ptr\n    }\n    pendingQueries.length = ptr\n\n    // Update all pending stat queries\n    ptr = 0\n    for (i = 0; i < pendingStats.length; ++i) {\n      var stats = pendingStats[i]\n      var start = stats.startQueryIndex\n      var end = stats.endQueryIndex\n      stats.sum += timeSum[end] - timeSum[start]\n      var startPtr = queryPtr[start]\n      var endPtr = queryPtr[end]\n      if (endPtr === startPtr) {\n        stats.stats.gpuTime += stats.sum / 1e6\n        freePendingStats(stats)\n      } else {\n        stats.startQueryIndex = startPtr\n        stats.endQueryIndex = endPtr\n        pendingStats[ptr++] = stats\n      }\n    }\n    pendingStats.length = ptr\n  }\n\n  return {\n    beginQuery: beginQuery,\n    endQuery: endQuery,\n    pushScopeStats: pushScopeStats,\n    update: update,\n    getNumPendingQueries: function () {\n      return pendingQueries.length\n    },\n    clear: function () {\n      queryPool.push.apply(queryPool, pendingQueries)\n      for (var i = 0; i < queryPool.length; i++) {\n        extTimer.deleteQueryEXT(queryPool[i])\n      }\n      pendingQueries.length = 0\n      queryPool.length = 0\n    },\n    restore: function () {\n      pendingQueries.length = 0\n      queryPool.length = 0\n    }\n  }\n}\n","// Error checking and parameter validation.\n//\n// Statements for the form `check.someProcedure(...)` get removed by\n// a browserify transform for optimized/minified bundles.\n//\n/* globals btoa */\nvar isTypedArray = require('./is-typed-array')\nvar extend = require('./extend')\n\n// only used for extracting shader names.  if btoa not present, then errors\n// will be slightly crappier\nfunction decodeB64 (str) {\n  if (typeof btoa !== 'undefined') {\n    return btoa(str)\n  }\n  return 'base64:' + str\n}\n\nfunction raise (message) {\n  var error = new Error('(regl) ' + message)\n  console.error(error)\n  throw error\n}\n\nfunction check (pred, message) {\n  if (!pred) {\n    raise(message)\n  }\n}\n\nfunction encolon (message) {\n  if (message) {\n    return ': ' + message\n  }\n  return ''\n}\n\nfunction checkParameter (param, possibilities, message) {\n  if (!(param in possibilities)) {\n    raise('unknown parameter (' + param + ')' + encolon(message) +\n          '. possible values: ' + Object.keys(possibilities).join())\n  }\n}\n\nfunction checkIsTypedArray (data, message) {\n  if (!isTypedArray(data)) {\n    raise(\n      'invalid parameter type' + encolon(message) +\n      '. must be a typed array')\n  }\n}\n\nfunction checkTypeOf (value, type, message) {\n  if (typeof value !== type) {\n    raise(\n      'invalid parameter type' + encolon(message) +\n      '. expected ' + type + ', got ' + (typeof value))\n  }\n}\n\nfunction checkNonNegativeInt (value, message) {\n  if (!((value >= 0) &&\n        ((value | 0) === value))) {\n    raise('invalid parameter type, (' + value + ')' + encolon(message) +\n          '. must be a nonnegative integer')\n  }\n}\n\nfunction checkOneOf (value, list, message) {\n  if (list.indexOf(value) < 0) {\n    raise('invalid value' + encolon(message) + '. must be one of: ' + list)\n  }\n}\n\nvar constructorKeys = [\n  'gl',\n  'canvas',\n  'container',\n  'attributes',\n  'pixelRatio',\n  'extensions',\n  'optionalExtensions',\n  'profile',\n  'onDone'\n]\n\nfunction checkConstructor (obj) {\n  Object.keys(obj).forEach(function (key) {\n    if (constructorKeys.indexOf(key) < 0) {\n      raise('invalid regl constructor argument \"' + key + '\". must be one of ' + constructorKeys)\n    }\n  })\n}\n\nfunction leftPad (str, n) {\n  str = str + ''\n  while (str.length < n) {\n    str = ' ' + str\n  }\n  return str\n}\n\nfunction ShaderFile () {\n  this.name = 'unknown'\n  this.lines = []\n  this.index = {}\n  this.hasErrors = false\n}\n\nfunction ShaderLine (number, line) {\n  this.number = number\n  this.line = line\n  this.errors = []\n}\n\nfunction ShaderError (fileNumber, lineNumber, message) {\n  this.file = fileNumber\n  this.line = lineNumber\n  this.message = message\n}\n\nfunction guessCommand () {\n  var error = new Error()\n  var stack = (error.stack || error).toString()\n  var pat = /compileProcedure.*\\n\\s*at.*\\((.*)\\)/.exec(stack)\n  if (pat) {\n    return pat[1]\n  }\n  var pat2 = /compileProcedure.*\\n\\s*at\\s+(.*)(\\n|$)/.exec(stack)\n  if (pat2) {\n    return pat2[1]\n  }\n  return 'unknown'\n}\n\nfunction guessCallSite () {\n  var error = new Error()\n  var stack = (error.stack || error).toString()\n  var pat = /at REGLCommand.*\\n\\s+at.*\\((.*)\\)/.exec(stack)\n  if (pat) {\n    return pat[1]\n  }\n  var pat2 = /at REGLCommand.*\\n\\s+at\\s+(.*)\\n/.exec(stack)\n  if (pat2) {\n    return pat2[1]\n  }\n  return 'unknown'\n}\n\nfunction parseSource (source, command) {\n  var lines = source.split('\\n')\n  var lineNumber = 1\n  var fileNumber = 0\n  var files = {\n    unknown: new ShaderFile(),\n    0: new ShaderFile()\n  }\n  files.unknown.name = files[0].name = command || guessCommand()\n  files.unknown.lines.push(new ShaderLine(0, ''))\n  for (var i = 0; i < lines.length; ++i) {\n    var line = lines[i]\n    var parts = /^\\s*\\#\\s*(\\w+)\\s+(.+)\\s*$/.exec(line)\n    if (parts) {\n      switch (parts[1]) {\n        case 'line':\n          var lineNumberInfo = /(\\d+)(\\s+\\d+)?/.exec(parts[2])\n          if (lineNumberInfo) {\n            lineNumber = lineNumberInfo[1] | 0\n            if (lineNumberInfo[2]) {\n              fileNumber = lineNumberInfo[2] | 0\n              if (!(fileNumber in files)) {\n                files[fileNumber] = new ShaderFile()\n              }\n            }\n          }\n          break\n        case 'define':\n          var nameInfo = /SHADER_NAME(_B64)?\\s+(.*)$/.exec(parts[2])\n          if (nameInfo) {\n            files[fileNumber].name = (nameInfo[1]\n                ? decodeB64(nameInfo[2])\n                : nameInfo[2])\n          }\n          break\n      }\n    }\n    files[fileNumber].lines.push(new ShaderLine(lineNumber++, line))\n  }\n  Object.keys(files).forEach(function (fileNumber) {\n    var file = files[fileNumber]\n    file.lines.forEach(function (line) {\n      file.index[line.number] = line\n    })\n  })\n  return files\n}\n\nfunction parseErrorLog (errLog) {\n  var result = []\n  errLog.split('\\n').forEach(function (errMsg) {\n    if (errMsg.length < 5) {\n      return\n    }\n    var parts = /^ERROR\\:\\s+(\\d+)\\:(\\d+)\\:\\s*(.*)$/.exec(errMsg)\n    if (parts) {\n      result.push(new ShaderError(\n        parts[1] | 0,\n        parts[2] | 0,\n        parts[3].trim()))\n    } else if (errMsg.length > 0) {\n      result.push(new ShaderError('unknown', 0, errMsg))\n    }\n  })\n  return result\n}\n\nfunction annotateFiles (files, errors) {\n  errors.forEach(function (error) {\n    var file = files[error.file]\n    if (file) {\n      var line = file.index[error.line]\n      if (line) {\n        line.errors.push(error)\n        file.hasErrors = true\n        return\n      }\n    }\n    files.unknown.hasErrors = true\n    files.unknown.lines[0].errors.push(error)\n  })\n}\n\nfunction checkShaderError (gl, shader, source, type, command) {\n  if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n    var errLog = gl.getShaderInfoLog(shader)\n    var typeName = type === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex'\n    checkCommandType(source, 'string', typeName + ' shader source must be a string', command)\n    var files = parseSource(source, command)\n    var errors = parseErrorLog(errLog)\n    annotateFiles(files, errors)\n\n    Object.keys(files).forEach(function (fileNumber) {\n      var file = files[fileNumber]\n      if (!file.hasErrors) {\n        return\n      }\n\n      var strings = ['']\n      var styles = ['']\n\n      function push (str, style) {\n        strings.push(str)\n        styles.push(style || '')\n      }\n\n      push('file number ' + fileNumber + ': ' + file.name + '\\n', 'color:red;text-decoration:underline;font-weight:bold')\n\n      file.lines.forEach(function (line) {\n        if (line.errors.length > 0) {\n          push(leftPad(line.number, 4) + '|  ', 'background-color:yellow; font-weight:bold')\n          push(line.line + '\\n', 'color:red; background-color:yellow; font-weight:bold')\n\n          // try to guess token\n          var offset = 0\n          line.errors.forEach(function (error) {\n            var message = error.message\n            var token = /^\\s*\\'(.*)\\'\\s*\\:\\s*(.*)$/.exec(message)\n            if (token) {\n              var tokenPat = token[1]\n              message = token[2]\n              switch (tokenPat) {\n                case 'assign':\n                  tokenPat = '='\n                  break\n              }\n              offset = Math.max(line.line.indexOf(tokenPat, offset), 0)\n            } else {\n              offset = 0\n            }\n\n            push(leftPad('| ', 6))\n            push(leftPad('^^^', offset + 3) + '\\n', 'font-weight:bold')\n            push(leftPad('| ', 6))\n            push(message + '\\n', 'font-weight:bold')\n          })\n          push(leftPad('| ', 6) + '\\n')\n        } else {\n          push(leftPad(line.number, 4) + '|  ')\n          push(line.line + '\\n', 'color:red')\n        }\n      })\n      if (typeof document !== 'undefined') {\n        styles[0] = strings.join('%c')\n        console.log.apply(console, styles)\n      } else {\n        console.log(strings.join(''))\n      }\n    })\n\n    check.raise('Error compiling ' + typeName + ' shader, ' + files[0].name)\n  }\n}\n\nfunction checkLinkError (gl, program, fragShader, vertShader, command) {\n  if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {\n    var errLog = gl.getProgramInfoLog(program)\n    var fragParse = parseSource(fragShader, command)\n    var vertParse = parseSource(vertShader, command)\n\n    var header = 'Error linking program with vertex shader, \"' +\n      vertParse[0].name + '\", and fragment shader \"' + fragParse[0].name + '\"'\n\n    if (typeof document !== 'undefined') {\n      console.log('%c' + header + '\\n%c' + errLog,\n        'color:red;text-decoration:underline;font-weight:bold',\n        'color:red')\n    } else {\n      console.log(header + '\\n' + errLog)\n    }\n    check.raise(header)\n  }\n}\n\nfunction saveCommandRef (object) {\n  object._commandRef = guessCommand()\n}\n\nfunction saveDrawCommandInfo (opts, uniforms, attributes, stringStore) {\n  saveCommandRef(opts)\n\n  function id (str) {\n    if (str) {\n      return stringStore.id(str)\n    }\n    return 0\n  }\n  opts._fragId = id(opts.static.frag)\n  opts._vertId = id(opts.static.vert)\n\n  function addProps (dict, set) {\n    Object.keys(set).forEach(function (u) {\n      dict[stringStore.id(u)] = true\n    })\n  }\n\n  var uniformSet = opts._uniformSet = {}\n  addProps(uniformSet, uniforms.static)\n  addProps(uniformSet, uniforms.dynamic)\n\n  var attributeSet = opts._attributeSet = {}\n  addProps(attributeSet, attributes.static)\n  addProps(attributeSet, attributes.dynamic)\n\n  opts._hasCount = (\n    'count' in opts.static ||\n    'count' in opts.dynamic ||\n    'elements' in opts.static ||\n    'elements' in opts.dynamic)\n}\n\nfunction commandRaise (message, command) {\n  var callSite = guessCallSite()\n  raise(message +\n    ' in command ' + (command || guessCommand()) +\n    (callSite === 'unknown' ? '' : ' called from ' + callSite))\n}\n\nfunction checkCommand (pred, message, command) {\n  if (!pred) {\n    commandRaise(message, command || guessCommand())\n  }\n}\n\nfunction checkParameterCommand (param, possibilities, message, command) {\n  if (!(param in possibilities)) {\n    commandRaise(\n      'unknown parameter (' + param + ')' + encolon(message) +\n      '. possible values: ' + Object.keys(possibilities).join(),\n      command || guessCommand())\n  }\n}\n\nfunction checkCommandType (value, type, message, command) {\n  if (typeof value !== type) {\n    commandRaise(\n      'invalid parameter type' + encolon(message) +\n      '. expected ' + type + ', got ' + (typeof value),\n      command || guessCommand())\n  }\n}\n\nfunction checkOptional (block) {\n  block()\n}\n\nfunction checkFramebufferFormat (attachment, texFormats, rbFormats) {\n  if (attachment.texture) {\n    checkOneOf(\n      attachment.texture._texture.internalformat,\n      texFormats,\n      'unsupported texture format for attachment')\n  } else {\n    checkOneOf(\n      attachment.renderbuffer._renderbuffer.format,\n      rbFormats,\n      'unsupported renderbuffer format for attachment')\n  }\n}\n\nvar GL_CLAMP_TO_EDGE = 0x812F\n\nvar GL_NEAREST = 0x2600\nvar GL_NEAREST_MIPMAP_NEAREST = 0x2700\nvar GL_LINEAR_MIPMAP_NEAREST = 0x2701\nvar GL_NEAREST_MIPMAP_LINEAR = 0x2702\nvar GL_LINEAR_MIPMAP_LINEAR = 0x2703\n\nvar GL_BYTE = 5120\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_SHORT = 5122\nvar GL_UNSIGNED_SHORT = 5123\nvar GL_INT = 5124\nvar GL_UNSIGNED_INT = 5125\nvar GL_FLOAT = 5126\n\nvar GL_UNSIGNED_SHORT_4_4_4_4 = 0x8033\nvar GL_UNSIGNED_SHORT_5_5_5_1 = 0x8034\nvar GL_UNSIGNED_SHORT_5_6_5 = 0x8363\nvar GL_UNSIGNED_INT_24_8_WEBGL = 0x84FA\n\nvar GL_HALF_FLOAT_OES = 0x8D61\n\nvar TYPE_SIZE = {}\n\nTYPE_SIZE[GL_BYTE] =\nTYPE_SIZE[GL_UNSIGNED_BYTE] = 1\n\nTYPE_SIZE[GL_SHORT] =\nTYPE_SIZE[GL_UNSIGNED_SHORT] =\nTYPE_SIZE[GL_HALF_FLOAT_OES] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_5_6_5] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_4_4_4_4] =\nTYPE_SIZE[GL_UNSIGNED_SHORT_5_5_5_1] = 2\n\nTYPE_SIZE[GL_INT] =\nTYPE_SIZE[GL_UNSIGNED_INT] =\nTYPE_SIZE[GL_FLOAT] =\nTYPE_SIZE[GL_UNSIGNED_INT_24_8_WEBGL] = 4\n\nfunction pixelSize (type, channels) {\n  if (type === GL_UNSIGNED_SHORT_5_5_5_1 ||\n      type === GL_UNSIGNED_SHORT_4_4_4_4 ||\n      type === GL_UNSIGNED_SHORT_5_6_5) {\n    return 2\n  } else if (type === GL_UNSIGNED_INT_24_8_WEBGL) {\n    return 4\n  } else {\n    return TYPE_SIZE[type] * channels\n  }\n}\n\nfunction isPow2 (v) {\n  return !(v & (v - 1)) && (!!v)\n}\n\nfunction checkTexture2D (info, mipData, limits) {\n  var i\n  var w = mipData.width\n  var h = mipData.height\n  var c = mipData.channels\n\n  // Check texture shape\n  check(w > 0 && w <= limits.maxTextureSize &&\n        h > 0 && h <= limits.maxTextureSize,\n        'invalid texture shape')\n\n  // check wrap mode\n  if (info.wrapS !== GL_CLAMP_TO_EDGE || info.wrapT !== GL_CLAMP_TO_EDGE) {\n    check(isPow2(w) && isPow2(h),\n      'incompatible wrap mode for texture, both width and height must be power of 2')\n  }\n\n  if (mipData.mipmask === 1) {\n    if (w !== 1 && h !== 1) {\n      check(\n        info.minFilter !== GL_NEAREST_MIPMAP_NEAREST &&\n        info.minFilter !== GL_NEAREST_MIPMAP_LINEAR &&\n        info.minFilter !== GL_LINEAR_MIPMAP_NEAREST &&\n        info.minFilter !== GL_LINEAR_MIPMAP_LINEAR,\n        'min filter requires mipmap')\n    }\n  } else {\n    // texture must be power of 2\n    check(isPow2(w) && isPow2(h),\n      'texture must be a square power of 2 to support mipmapping')\n    check(mipData.mipmask === (w << 1) - 1,\n      'missing or incomplete mipmap data')\n  }\n\n  if (mipData.type === GL_FLOAT) {\n    if (limits.extensions.indexOf('oes_texture_float_linear') < 0) {\n      check(info.minFilter === GL_NEAREST && info.magFilter === GL_NEAREST,\n        'filter not supported, must enable oes_texture_float_linear')\n    }\n    check(!info.genMipmaps,\n      'mipmap generation not supported with float textures')\n  }\n\n  // check image complete\n  var mipimages = mipData.images\n  for (i = 0; i < 16; ++i) {\n    if (mipimages[i]) {\n      var mw = w >> i\n      var mh = h >> i\n      check(mipData.mipmask & (1 << i), 'missing mipmap data')\n\n      var img = mipimages[i]\n\n      check(\n        img.width === mw &&\n        img.height === mh,\n        'invalid shape for mip images')\n\n      check(\n        img.format === mipData.format &&\n        img.internalformat === mipData.internalformat &&\n        img.type === mipData.type,\n        'incompatible type for mip image')\n\n      if (img.compressed) {\n        // TODO: check size for compressed images\n      } else if (img.data) {\n        check(img.data.byteLength === mw * mh *\n          Math.max(pixelSize(img.type, c), img.unpackAlignment),\n          'invalid data for image, buffer size is inconsistent with image format')\n      } else if (img.element) {\n        // TODO: check element can be loaded\n      } else if (img.copy) {\n        // TODO: check compatible format and type\n      }\n    } else if (!info.genMipmaps) {\n      check((mipData.mipmask & (1 << i)) === 0, 'extra mipmap data')\n    }\n  }\n\n  if (mipData.compressed) {\n    check(!info.genMipmaps,\n      'mipmap generation for compressed images not supported')\n  }\n}\n\nfunction checkTextureCube (texture, info, faces, limits) {\n  var w = texture.width\n  var h = texture.height\n  var c = texture.channels\n\n  // Check texture shape\n  check(\n    w > 0 && w <= limits.maxTextureSize && h > 0 && h <= limits.maxTextureSize,\n    'invalid texture shape')\n  check(\n    w === h,\n    'cube map must be square')\n  check(\n    info.wrapS === GL_CLAMP_TO_EDGE && info.wrapT === GL_CLAMP_TO_EDGE,\n    'wrap mode not supported by cube map')\n\n  for (var i = 0; i < faces.length; ++i) {\n    var face = faces[i]\n    check(\n      face.width === w && face.height === h,\n      'inconsistent cube map face shape')\n\n    if (info.genMipmaps) {\n      check(!face.compressed,\n        'can not generate mipmap for compressed textures')\n      check(face.mipmask === 1,\n        'can not specify mipmaps and generate mipmaps')\n    } else {\n      // TODO: check mip and filter mode\n    }\n\n    var mipmaps = face.images\n    for (var j = 0; j < 16; ++j) {\n      var img = mipmaps[j]\n      if (img) {\n        var mw = w >> j\n        var mh = h >> j\n        check(face.mipmask & (1 << j), 'missing mipmap data')\n        check(\n          img.width === mw &&\n          img.height === mh,\n          'invalid shape for mip images')\n        check(\n          img.format === texture.format &&\n          img.internalformat === texture.internalformat &&\n          img.type === texture.type,\n          'incompatible type for mip image')\n\n        if (img.compressed) {\n          // TODO: check size for compressed images\n        } else if (img.data) {\n          check(img.data.byteLength === mw * mh *\n            Math.max(pixelSize(img.type, c), img.unpackAlignment),\n            'invalid data for image, buffer size is inconsistent with image format')\n        } else if (img.element) {\n          // TODO: check element can be loaded\n        } else if (img.copy) {\n          // TODO: check compatible format and type\n        }\n      }\n    }\n  }\n}\n\nmodule.exports = extend(check, {\n  optional: checkOptional,\n  raise: raise,\n  commandRaise: commandRaise,\n  command: checkCommand,\n  parameter: checkParameter,\n  commandParameter: checkParameterCommand,\n  constructor: checkConstructor,\n  type: checkTypeOf,\n  commandType: checkCommandType,\n  isTypedArray: checkIsTypedArray,\n  nni: checkNonNegativeInt,\n  oneOf: checkOneOf,\n  shaderError: checkShaderError,\n  linkError: checkLinkError,\n  callSite: guessCallSite,\n  saveCommandRef: saveCommandRef,\n  saveDrawInfo: saveDrawCommandInfo,\n  framebufferFormat: checkFramebufferFormat,\n  guessCommand: guessCommand,\n  texture2D: checkTexture2D,\n  textureCube: checkTextureCube\n})\n","/* globals performance */\nmodule.exports =\n  (typeof performance !== 'undefined' && performance.now)\n  ? function () { return performance.now() }\n  : function () { return +(new Date()) }\n","var extend = require('./extend')\n\nfunction slice (x) {\n  return Array.prototype.slice.call(x)\n}\n\nfunction join (x) {\n  return slice(x).join('')\n}\n\nmodule.exports = function createEnvironment () {\n  // Unique variable id counter\n  var varCounter = 0\n\n  // Linked values are passed from this scope into the generated code block\n  // Calling link() passes a value into the generated scope and returns\n  // the variable name which it is bound to\n  var linkedNames = []\n  var linkedValues = []\n  function link (value) {\n    for (var i = 0; i < linkedValues.length; ++i) {\n      if (linkedValues[i] === value) {\n        return linkedNames[i]\n      }\n    }\n\n    var name = 'g' + (varCounter++)\n    linkedNames.push(name)\n    linkedValues.push(value)\n    return name\n  }\n\n  // create a code block\n  function block () {\n    var code = []\n    function push () {\n      code.push.apply(code, slice(arguments))\n    }\n\n    var vars = []\n    function def () {\n      var name = 'v' + (varCounter++)\n      vars.push(name)\n\n      if (arguments.length > 0) {\n        code.push(name, '=')\n        code.push.apply(code, slice(arguments))\n        code.push(';')\n      }\n\n      return name\n    }\n\n    return extend(push, {\n      def: def,\n      toString: function () {\n        return join([\n          (vars.length > 0 ? 'var ' + vars + ';' : ''),\n          join(code)\n        ])\n      }\n    })\n  }\n\n  function scope () {\n    var entry = block()\n    var exit = block()\n\n    var entryToString = entry.toString\n    var exitToString = exit.toString\n\n    function save (object, prop) {\n      exit(object, prop, '=', entry.def(object, prop), ';')\n    }\n\n    return extend(function () {\n      entry.apply(entry, slice(arguments))\n    }, {\n      def: entry.def,\n      entry: entry,\n      exit: exit,\n      save: save,\n      set: function (object, prop, value) {\n        save(object, prop)\n        entry(object, prop, '=', value, ';')\n      },\n      toString: function () {\n        return entryToString() + exitToString()\n      }\n    })\n  }\n\n  function conditional () {\n    var pred = join(arguments)\n    var thenBlock = scope()\n    var elseBlock = scope()\n\n    var thenToString = thenBlock.toString\n    var elseToString = elseBlock.toString\n\n    return extend(thenBlock, {\n      then: function () {\n        thenBlock.apply(thenBlock, slice(arguments))\n        return this\n      },\n      else: function () {\n        elseBlock.apply(elseBlock, slice(arguments))\n        return this\n      },\n      toString: function () {\n        var elseClause = elseToString()\n        if (elseClause) {\n          elseClause = 'else{' + elseClause + '}'\n        }\n        return join([\n          'if(', pred, '){',\n          thenToString(),\n          '}', elseClause\n        ])\n      }\n    })\n  }\n\n  // procedure list\n  var globalBlock = block()\n  var procedures = {}\n  function proc (name, count) {\n    var args = []\n    function arg () {\n      var name = 'a' + args.length\n      args.push(name)\n      return name\n    }\n\n    count = count || 0\n    for (var i = 0; i < count; ++i) {\n      arg()\n    }\n\n    var body = scope()\n    var bodyToString = body.toString\n\n    var result = procedures[name] = extend(body, {\n      arg: arg,\n      toString: function () {\n        return join([\n          'function(', args.join(), '){',\n          bodyToString(),\n          '}'\n        ])\n      }\n    })\n\n    return result\n  }\n\n  function compile () {\n    var code = ['\"use strict\";',\n      globalBlock,\n      'return {']\n    Object.keys(procedures).forEach(function (name) {\n      code.push('\"', name, '\":', procedures[name].toString(), ',')\n    })\n    code.push('}')\n    var src = join(code)\n      .replace(/;/g, ';\\n')\n      .replace(/}/g, '}\\n')\n      .replace(/{/g, '{\\n')\n    var proc = Function.apply(null, linkedNames.concat(src))\n    return proc.apply(null, linkedValues)\n  }\n\n  return {\n    global: globalBlock,\n    link: link,\n    block: block,\n    proc: proc,\n    scope: scope,\n    cond: conditional,\n    compile: compile\n  }\n}\n","module.exports = function (base, opts) {\n  var keys = Object.keys(opts)\n  for (var i = 0; i < keys.length; ++i) {\n    base[keys[i]] = opts[keys[i]]\n  }\n  return base\n}\n","var isTypedArray = require('./is-typed-array')\nmodule.exports = function isArrayLike (s) {\n  return Array.isArray(s) || isTypedArray(s)\n}\n","var isTypedArray = require('./is-typed-array')\n\nmodule.exports = function isNDArrayLike (obj) {\n  return (\n    !!obj &&\n    typeof obj === 'object' &&\n    Array.isArray(obj.shape) &&\n    Array.isArray(obj.stride) &&\n    typeof obj.offset === 'number' &&\n    obj.shape.length === obj.stride.length &&\n    (Array.isArray(obj.data) ||\n      isTypedArray(obj.data)))\n}\n","var dtypes = require('../constants/arraytypes.json')\nmodule.exports = function (x) {\n  return Object.prototype.toString.call(x) in dtypes\n}\n","module.exports = function loop (n, f) {\n  var result = Array(n)\n  for (var i = 0; i < n; ++i) {\n    result[i] = f(i)\n  }\n  return result\n}\n","var loop = require('./loop')\n\nvar GL_BYTE = 5120\nvar GL_UNSIGNED_BYTE = 5121\nvar GL_SHORT = 5122\nvar GL_UNSIGNED_SHORT = 5123\nvar GL_INT = 5124\nvar GL_UNSIGNED_INT = 5125\nvar GL_FLOAT = 5126\n\nvar bufferPool = loop(8, function () {\n  return []\n})\n\nfunction nextPow16 (v) {\n  for (var i = 16; i <= (1 << 28); i *= 16) {\n    if (v <= i) {\n      return i\n    }\n  }\n  return 0\n}\n\nfunction log2 (v) {\n  var r, shift\n  r = (v > 0xFFFF) << 4\n  v >>>= r\n  shift = (v > 0xFF) << 3\n  v >>>= shift; r |= shift\n  shift = (v > 0xF) << 2\n  v >>>= shift; r |= shift\n  shift = (v > 0x3) << 1\n  v >>>= shift; r |= shift\n  return r | (v >> 1)\n}\n\nfunction alloc (n) {\n  var sz = nextPow16(n)\n  var bin = bufferPool[log2(sz) >> 2]\n  if (bin.length > 0) {\n    return bin.pop()\n  }\n  return new ArrayBuffer(sz)\n}\n\nfunction free (buf) {\n  bufferPool[log2(buf.byteLength) >> 2].push(buf)\n}\n\nfunction allocType (type, n) {\n  var result = null\n  switch (type) {\n    case GL_BYTE:\n      result = new Int8Array(alloc(n), 0, n)\n      break\n    case GL_UNSIGNED_BYTE:\n      result = new Uint8Array(alloc(n), 0, n)\n      break\n    case GL_SHORT:\n      result = new Int16Array(alloc(2 * n), 0, n)\n      break\n    case GL_UNSIGNED_SHORT:\n      result = new Uint16Array(alloc(2 * n), 0, n)\n      break\n    case GL_INT:\n      result = new Int32Array(alloc(4 * n), 0, n)\n      break\n    case GL_UNSIGNED_INT:\n      result = new Uint32Array(alloc(4 * n), 0, n)\n      break\n    case GL_FLOAT:\n      result = new Float32Array(alloc(4 * n), 0, n)\n      break\n    default:\n      return null\n  }\n  if (result.length !== n) {\n    return result.subarray(0, n)\n  }\n  return result\n}\n\nfunction freeType (array) {\n  free(array.buffer)\n}\n\nmodule.exports = {\n  alloc: alloc,\n  free: free,\n  allocType: allocType,\n  freeType: freeType\n}\n","/* globals requestAnimationFrame, cancelAnimationFrame */\nif (typeof requestAnimationFrame === 'function' &&\n    typeof cancelAnimationFrame === 'function') {\n  module.exports = {\n    next: function (x) { return requestAnimationFrame(x) },\n    cancel: function (x) { return cancelAnimationFrame(x) }\n  }\n} else {\n  module.exports = {\n    next: function (cb) {\n      return setTimeout(cb, 16)\n    },\n    cancel: clearTimeout\n  }\n}\n","var pool = require('./pool')\n\nvar FLOAT = new Float32Array(1)\nvar INT = new Uint32Array(FLOAT.buffer)\n\nvar GL_UNSIGNED_SHORT = 5123\n\nmodule.exports = function convertToHalfFloat (array) {\n  var ushorts = pool.allocType(GL_UNSIGNED_SHORT, array.length)\n\n  for (var i = 0; i < array.length; ++i) {\n    if (isNaN(array[i])) {\n      ushorts[i] = 0xffff\n    } else if (array[i] === Infinity) {\n      ushorts[i] = 0x7c00\n    } else if (array[i] === -Infinity) {\n      ushorts[i] = 0xfc00\n    } else {\n      FLOAT[0] = array[i]\n      var x = INT[0]\n\n      var sgn = (x >>> 31) << 15\n      var exp = ((x << 1) >>> 24) - 127\n      var frac = (x >> 13) & ((1 << 10) - 1)\n\n      if (exp < -24) {\n        // round non-representable denormals to 0\n        ushorts[i] = sgn\n      } else if (exp < -14) {\n        // handle denormals\n        var s = -14 - exp\n        ushorts[i] = sgn + ((frac + (1 << 10)) >> s)\n      } else if (exp > 15) {\n        // round overflow to +/- Infinity\n        ushorts[i] = sgn + 0x7c00\n      } else {\n        // otherwise convert directly\n        ushorts[i] = sgn + ((exp + 15) << 10) + frac\n      }\n    }\n  }\n\n  return ushorts\n}\n","module.exports = function (obj) {\n  return Object.keys(obj).map(function (key) { return obj[key] })\n}\n","// Context and canvas creation helper functions\nvar check = require('./util/check')\nvar extend = require('./util/extend')\n\nfunction createCanvas (element, onDone, pixelRatio) {\n  var canvas = document.createElement('canvas')\n  extend(canvas.style, {\n    border: 0,\n    margin: 0,\n    padding: 0,\n    top: 0,\n    left: 0\n  })\n  element.appendChild(canvas)\n\n  if (element === document.body) {\n    canvas.style.position = 'absolute'\n    extend(element.style, {\n      margin: 0,\n      padding: 0\n    })\n  }\n\n  function resize () {\n    var w = window.innerWidth\n    var h = window.innerHeight\n    if (element !== document.body) {\n      var bounds = element.getBoundingClientRect()\n      w = bounds.right - bounds.left\n      h = bounds.top - bounds.bottom\n    }\n    canvas.width = pixelRatio * w\n    canvas.height = pixelRatio * h\n    extend(canvas.style, {\n      width: w + 'px',\n      height: h + 'px'\n    })\n  }\n\n  window.addEventListener('resize', resize, false)\n\n  function onDestroy () {\n    window.removeEventListener('resize', resize)\n    element.removeChild(canvas)\n  }\n\n  resize()\n\n  return {\n    canvas: canvas,\n    onDestroy: onDestroy\n  }\n}\n\nfunction createContext (canvas, contexAttributes) {\n  function get (name) {\n    try {\n      return canvas.getContext(name, contexAttributes)\n    } catch (e) {\n      return null\n    }\n  }\n  return (\n    get('webgl') ||\n    get('experimental-webgl') ||\n    get('webgl-experimental')\n  )\n}\n\nfunction isHTMLElement (obj) {\n  return (\n    typeof obj.nodeName === 'string' &&\n    typeof obj.appendChild === 'function' &&\n    typeof obj.getBoundingClientRect === 'function'\n  )\n}\n\nfunction isWebGLContext (obj) {\n  return (\n    typeof obj.drawArrays === 'function' ||\n    typeof obj.drawElements === 'function'\n  )\n}\n\nfunction parseExtensions (input) {\n  if (typeof input === 'string') {\n    return input.split()\n  }\n  check(Array.isArray(input), 'invalid extension array')\n  return input\n}\n\nfunction getElement (desc) {\n  if (typeof desc === 'string') {\n    check(typeof document !== 'undefined', 'not supported outside of DOM')\n    return document.querySelector(desc)\n  }\n  return desc\n}\n\nmodule.exports = function parseArgs (args_) {\n  var args = args_ || {}\n  var element, container, canvas, gl\n  var contextAttributes = {}\n  var extensions = []\n  var optionalExtensions = []\n  var pixelRatio = (typeof window === 'undefined' ? 1 : window.devicePixelRatio)\n  var profile = false\n  var onDone = function (err) {\n    if (err) {\n      check.raise(err)\n    }\n  }\n  var onDestroy = function () {}\n  if (typeof args === 'string') {\n    check(\n      typeof document !== 'undefined',\n      'selector queries only supported in DOM enviroments')\n    element = document.querySelector(args)\n    check(element, 'invalid query string for element')\n  } else if (typeof args === 'object') {\n    if (isHTMLElement(args)) {\n      element = args\n    } else if (isWebGLContext(args)) {\n      gl = args\n      canvas = gl.canvas\n    } else {\n      check.constructor(args)\n      if ('gl' in args) {\n        gl = args.gl\n      } else if ('canvas' in args) {\n        canvas = getElement(args.canvas)\n      } else if ('container' in args) {\n        container = getElement(args.container)\n      }\n      if ('attributes' in args) {\n        contextAttributes = args.attributes\n        check.type(contextAttributes, 'object', 'invalid context attributes')\n      }\n      if ('extensions' in args) {\n        extensions = parseExtensions(args.extensions)\n      }\n      if ('optionalExtensions' in args) {\n        optionalExtensions = parseExtensions(args.optionalExtensions)\n      }\n      if ('onDone' in args) {\n        check.type(\n          args.onDone, 'function',\n          'invalid or missing onDone callback')\n        onDone = args.onDone\n      }\n      if ('profile' in args) {\n        profile = !!args.profile\n      }\n      if ('pixelRatio' in args) {\n        pixelRatio = +args.pixelRatio\n        check(pixelRatio > 0, 'invalid pixel ratio')\n      }\n    }\n  } else {\n    check.raise('invalid arguments to regl')\n  }\n\n  if (element) {\n    if (element.nodeName.toLowerCase() === 'canvas') {\n      canvas = element\n    } else {\n      container = element\n    }\n  }\n\n  if (!gl) {\n    if (!canvas) {\n      check(\n        typeof document !== 'undefined',\n        'must manually specify webgl context outside of DOM environments')\n      var result = createCanvas(container || document.body, onDone, pixelRatio)\n      if (!result) {\n        return null\n      }\n      canvas = result.canvas\n      onDestroy = result.onDestroy\n    }\n    gl = createContext(canvas, contextAttributes)\n  }\n\n  if (!gl) {\n    onDestroy()\n    onDone('webgl not supported, try upgrading your browser or graphics drivers http://get.webgl.org')\n    return null\n  }\n\n  return {\n    gl: gl,\n    canvas: canvas,\n    container: container,\n    extensions: extensions,\n    optionalExtensions: optionalExtensions,\n    pixelRatio: pixelRatio,\n    profile: profile,\n    onDone: onDone,\n    onDestroy: onDestroy\n  }\n}\n","var check = require('./lib/util/check')\nvar extend = require('./lib/util/extend')\nvar dynamic = require('./lib/dynamic')\nvar raf = require('./lib/util/raf')\nvar clock = require('./lib/util/clock')\nvar createStringStore = require('./lib/strings')\nvar initWebGL = require('./lib/webgl')\nvar wrapExtensions = require('./lib/extension')\nvar wrapLimits = require('./lib/limits')\nvar wrapBuffers = require('./lib/buffer')\nvar wrapElements = require('./lib/elements')\nvar wrapTextures = require('./lib/texture')\nvar wrapRenderbuffers = require('./lib/renderbuffer')\nvar wrapFramebuffers = require('./lib/framebuffer')\nvar wrapAttributes = require('./lib/attribute')\nvar wrapShaders = require('./lib/shader')\nvar wrapRead = require('./lib/read')\nvar createCore = require('./lib/core')\nvar createStats = require('./lib/stats')\nvar createTimer = require('./lib/timer')\n\nvar GL_COLOR_BUFFER_BIT = 16384\nvar GL_DEPTH_BUFFER_BIT = 256\nvar GL_STENCIL_BUFFER_BIT = 1024\n\nvar GL_ARRAY_BUFFER = 34962\n\nvar CONTEXT_LOST_EVENT = 'webglcontextlost'\nvar CONTEXT_RESTORED_EVENT = 'webglcontextrestored'\n\nvar DYN_PROP = 1\nvar DYN_CONTEXT = 2\nvar DYN_STATE = 3\n\nfunction find (haystack, needle) {\n  for (var i = 0; i < haystack.length; ++i) {\n    if (haystack[i] === needle) {\n      return i\n    }\n  }\n  return -1\n}\n\nmodule.exports = function wrapREGL (args) {\n  var config = initWebGL(args)\n  if (!config) {\n    return null\n  }\n\n  var gl = config.gl\n  var glAttributes = gl.getContextAttributes()\n  var contextLost = gl.isContextLost()\n\n  var extensionState = wrapExtensions(gl, config)\n  if (!extensionState) {\n    return null\n  }\n\n  var stringStore = createStringStore()\n  var stats = createStats()\n  var extensions = extensionState.extensions\n  var timer = createTimer(gl, extensions)\n\n  var START_TIME = clock()\n  var WIDTH = gl.drawingBufferWidth\n  var HEIGHT = gl.drawingBufferHeight\n\n  var contextState = {\n    tick: 0,\n    time: 0,\n    viewportWidth: WIDTH,\n    viewportHeight: HEIGHT,\n    framebufferWidth: WIDTH,\n    framebufferHeight: HEIGHT,\n    drawingBufferWidth: WIDTH,\n    drawingBufferHeight: HEIGHT,\n    pixelRatio: config.pixelRatio\n  }\n  var uniformState = {}\n  var drawState = {\n    elements: null,\n    primitive: 4, // GL_TRIANGLES\n    count: -1,\n    offset: 0,\n    instances: -1\n  }\n\n  var limits = wrapLimits(gl, extensions)\n  var bufferState = wrapBuffers(gl, stats, config)\n  var elementState = wrapElements(gl, extensions, bufferState, stats)\n  var attributeState = wrapAttributes(\n    gl,\n    extensions,\n    limits,\n    bufferState,\n    stringStore)\n  var shaderState = wrapShaders(gl, stringStore, stats, config)\n  var textureState = wrapTextures(\n    gl,\n    extensions,\n    limits,\n    function () { core.procs.poll() },\n    contextState,\n    stats,\n    config)\n  var renderbufferState = wrapRenderbuffers(gl, extensions, limits, stats, config)\n  var framebufferState = wrapFramebuffers(\n    gl,\n    extensions,\n    limits,\n    textureState,\n    renderbufferState,\n    stats)\n  var core = createCore(\n    gl,\n    stringStore,\n    extensions,\n    limits,\n    bufferState,\n    elementState,\n    textureState,\n    framebufferState,\n    uniformState,\n    attributeState,\n    shaderState,\n    drawState,\n    contextState,\n    timer,\n    config)\n  var readPixels = wrapRead(\n    gl,\n    framebufferState,\n    core.procs.poll,\n    contextState,\n    glAttributes, extensions)\n\n  var nextState = core.next\n  var canvas = gl.canvas\n\n  var rafCallbacks = []\n  var lossCallbacks = []\n  var restoreCallbacks = []\n  var destroyCallbacks = [config.onDestroy]\n\n  var activeRAF = null\n  function handleRAF () {\n    if (rafCallbacks.length === 0) {\n      if (timer) {\n        timer.update()\n      }\n      activeRAF = null\n      return\n    }\n\n    // schedule next animation frame\n    activeRAF = raf.next(handleRAF)\n\n    // poll for changes\n    poll()\n\n    // fire a callback for all pending rafs\n    for (var i = rafCallbacks.length - 1; i >= 0; --i) {\n      var cb = rafCallbacks[i]\n      if (cb) {\n        cb(contextState, null, 0)\n      }\n    }\n\n    // flush all pending webgl calls\n    gl.flush()\n\n    // poll GPU timers *after* gl.flush so we don't delay command dispatch\n    if (timer) {\n      timer.update()\n    }\n  }\n\n  function startRAF () {\n    if (!activeRAF && rafCallbacks.length > 0) {\n      activeRAF = raf.next(handleRAF)\n    }\n  }\n\n  function stopRAF () {\n    if (activeRAF) {\n      raf.cancel(handleRAF)\n      activeRAF = null\n    }\n  }\n\n  function handleContextLoss (event) {\n    event.preventDefault()\n\n    // set context lost flag\n    contextLost = true\n\n    // pause request animation frame\n    stopRAF()\n\n    // lose context\n    lossCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  function handleContextRestored (event) {\n    // clear error code\n    gl.getError()\n\n    // clear context lost flag\n    contextLost = false\n\n    // refresh state\n    extensionState.restore()\n    shaderState.restore()\n    bufferState.restore()\n    textureState.restore()\n    renderbufferState.restore()\n    framebufferState.restore()\n    if (timer) {\n      timer.restore()\n    }\n\n    // refresh state\n    core.procs.refresh()\n\n    // restart RAF\n    startRAF()\n\n    // restore context\n    restoreCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  if (canvas) {\n    canvas.addEventListener(CONTEXT_LOST_EVENT, handleContextLoss, false)\n    canvas.addEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored, false)\n  }\n\n  function destroy () {\n    rafCallbacks.length = 0\n    stopRAF()\n\n    if (canvas) {\n      canvas.removeEventListener(CONTEXT_LOST_EVENT, handleContextLoss)\n      canvas.removeEventListener(CONTEXT_RESTORED_EVENT, handleContextRestored)\n    }\n\n    shaderState.clear()\n    framebufferState.clear()\n    renderbufferState.clear()\n    textureState.clear()\n    elementState.clear()\n    bufferState.clear()\n\n    if (timer) {\n      timer.clear()\n    }\n\n    destroyCallbacks.forEach(function (cb) {\n      cb()\n    })\n  }\n\n  function compileProcedure (options) {\n    check(!!options, 'invalid args to regl({...})')\n    check.type(options, 'object', 'invalid args to regl({...})')\n\n    function flattenNestedOptions (options) {\n      var result = extend({}, options)\n      delete result.uniforms\n      delete result.attributes\n      delete result.context\n\n      if ('stencil' in result && result.stencil.op) {\n        result.stencil.opBack = result.stencil.opFront = result.stencil.op\n        delete result.stencil.op\n      }\n\n      function merge (name) {\n        if (name in result) {\n          var child = result[name]\n          delete result[name]\n          Object.keys(child).forEach(function (prop) {\n            result[name + '.' + prop] = child[prop]\n          })\n        }\n      }\n      merge('blend')\n      merge('depth')\n      merge('cull')\n      merge('stencil')\n      merge('polygonOffset')\n      merge('scissor')\n      merge('sample')\n\n      return result\n    }\n\n    function separateDynamic (object) {\n      var staticItems = {}\n      var dynamicItems = {}\n      Object.keys(object).forEach(function (option) {\n        var value = object[option]\n        if (dynamic.isDynamic(value)) {\n          dynamicItems[option] = dynamic.unbox(value, option)\n        } else {\n          staticItems[option] = value\n        }\n      })\n      return {\n        dynamic: dynamicItems,\n        static: staticItems\n      }\n    }\n\n    // Treat context variables separate from other dynamic variables\n    var context = separateDynamic(options.context || {})\n    var uniforms = separateDynamic(options.uniforms || {})\n    var attributes = separateDynamic(options.attributes || {})\n    var opts = separateDynamic(flattenNestedOptions(options))\n\n    var stats = {\n      gpuTime: 0.0,\n      cpuTime: 0.0,\n      count: 0\n    }\n\n    var compiled = core.compile(opts, attributes, uniforms, context, stats)\n\n    var draw = compiled.draw\n    var batch = compiled.batch\n    var scope = compiled.scope\n\n    // FIXME: we should modify code generation for batch commands so this\n    // isn't necessary\n    var EMPTY_ARRAY = []\n    function reserve (count) {\n      while (EMPTY_ARRAY.length < count) {\n        EMPTY_ARRAY.push(null)\n      }\n      return EMPTY_ARRAY\n    }\n\n    function REGLCommand (args, body) {\n      var i\n      if (contextLost) {\n        check.raise('context lost')\n      }\n      if (typeof args === 'function') {\n        return scope.call(this, null, args, 0)\n      } else if (typeof body === 'function') {\n        if (typeof args === 'number') {\n          for (i = 0; i < args; ++i) {\n            scope.call(this, null, body, i)\n          }\n          return\n        } else if (Array.isArray(args)) {\n          for (i = 0; i < args.length; ++i) {\n            scope.call(this, args[i], body, i)\n          }\n          return\n        } else {\n          return scope.call(this, args, body, 0)\n        }\n      } else if (typeof args === 'number') {\n        if (args > 0) {\n          return batch.call(this, reserve(args | 0), args | 0)\n        }\n      } else if (Array.isArray(args)) {\n        if (args.length) {\n          return batch.call(this, args, args.length)\n        }\n      } else {\n        return draw.call(this, args)\n      }\n    }\n\n    return extend(REGLCommand, {\n      stats: stats\n    })\n  }\n\n  function clear (options) {\n    check(\n      typeof options === 'object' && options,\n      'regl.clear() takes an object as input')\n\n    var clearFlags = 0\n    core.procs.poll()\n\n    var c = options.color\n    if (c) {\n      gl.clearColor(+c[0] || 0, +c[1] || 0, +c[2] || 0, +c[3] || 0)\n      clearFlags |= GL_COLOR_BUFFER_BIT\n    }\n    if ('depth' in options) {\n      gl.clearDepth(+options.depth)\n      clearFlags |= GL_DEPTH_BUFFER_BIT\n    }\n    if ('stencil' in options) {\n      gl.clearStencil(options.stencil | 0)\n      clearFlags |= GL_STENCIL_BUFFER_BIT\n    }\n\n    check(!!clearFlags, 'called regl.clear with no buffer specified')\n    gl.clear(clearFlags)\n  }\n\n  function frame (cb) {\n    check.type(cb, 'function', 'regl.frame() callback must be a function')\n    rafCallbacks.push(cb)\n\n    function cancel () {\n      // FIXME:  should we check something other than equals cb here?\n      // what if a user calls frame twice with the same callback...\n      //\n      var i = find(rafCallbacks, cb)\n      check(i >= 0, 'cannot cancel a frame twice')\n      function pendingCancel () {\n        var index = find(rafCallbacks, pendingCancel)\n        rafCallbacks[index] = rafCallbacks[rafCallbacks.length - 1]\n        rafCallbacks.length -= 1\n        if (rafCallbacks.length <= 0) {\n          stopRAF()\n        }\n      }\n      rafCallbacks[i] = pendingCancel\n    }\n\n    startRAF()\n\n    return {\n      cancel: cancel\n    }\n  }\n\n  // poll viewport\n  function pollViewport () {\n    var viewport = nextState.viewport\n    var scissorBox = nextState.scissor_box\n    viewport[0] = viewport[1] = scissorBox[0] = scissorBox[1] = 0\n    contextState.viewportWidth =\n      contextState.framebufferWidth =\n      contextState.drawingBufferWidth =\n      viewport[2] =\n      scissorBox[2] = gl.drawingBufferWidth\n    contextState.viewportHeight =\n      contextState.framebufferHeight =\n      contextState.drawingBufferHeight =\n      viewport[3] =\n      scissorBox[3] = gl.drawingBufferHeight\n  }\n\n  function poll () {\n    contextState.tick += 1\n    contextState.time = now()\n    pollViewport()\n    core.procs.poll()\n  }\n\n  function refresh () {\n    pollViewport()\n    core.procs.refresh()\n    if (timer) {\n      timer.update()\n    }\n  }\n\n  function now () {\n    return (clock() - START_TIME) / 1000.0\n  }\n\n  refresh()\n\n  function addListener (event, callback) {\n    check.type(callback, 'function', 'listener callback must be a function')\n\n    var callbacks\n    switch (event) {\n      case 'frame':\n        return frame(callback)\n      case 'lost':\n        callbacks = lossCallbacks\n        break\n      case 'restore':\n        callbacks = restoreCallbacks\n        break\n      case 'destroy':\n        callbacks = destroyCallbacks\n        break\n      default:\n        check.raise('invalid event, must be one of frame,lost,restore,destroy')\n    }\n\n    callbacks.push(callback)\n    return {\n      cancel: function () {\n        for (var i = 0; i < callbacks.length; ++i) {\n          if (callbacks[i] === callback) {\n            callbacks[i] = callbacks[callbacks.length - 1]\n            callbacks.pop()\n            return\n          }\n        }\n      }\n    }\n  }\n\n  var regl = extend(compileProcedure, {\n    // Clear current FBO\n    clear: clear,\n\n    // Short cuts for dynamic variables\n    prop: dynamic.define.bind(null, DYN_PROP),\n    context: dynamic.define.bind(null, DYN_CONTEXT),\n    this: dynamic.define.bind(null, DYN_STATE),\n\n    // executes an empty draw command\n    draw: compileProcedure({}),\n\n    // Resources\n    buffer: function (options) {\n      return bufferState.create(options, GL_ARRAY_BUFFER, false, false)\n    },\n    elements: function (options) {\n      return elementState.create(options, false)\n    },\n    texture: textureState.create2D,\n    cube: textureState.createCube,\n    renderbuffer: renderbufferState.create,\n    framebuffer: framebufferState.create,\n    framebufferCube: framebufferState.createCube,\n\n    // Expose context attributes\n    attributes: glAttributes,\n\n    // Frame rendering\n    frame: frame,\n    on: addListener,\n\n    // System limits\n    limits: limits,\n    hasExtension: function (name) {\n      return limits.extensions.indexOf(name.toLowerCase()) >= 0\n    },\n\n    // Read pixels\n    read: readPixels,\n\n    // Destroy regl and all associated resources\n    destroy: destroy,\n\n    // Direct GL state manipulation\n    _gl: gl,\n    _refresh: refresh,\n\n    poll: function () {\n      poll()\n      if (timer) {\n        timer.update()\n      }\n    },\n\n    // Current time\n    now: now,\n\n    // regl Statistics Information\n    stats: stats\n  })\n\n  config.onDone(null, regl)\n\n  return regl\n}\n"]}
require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
(function (global){
/*!
* The buffer module from node.js, for the browser.
*
* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
* @license MIT
*/
/* eslint-disable no-proto */
'use strict'
var base64 = require('base64-js')
var ieee754 = require('ieee754')
var isArray = require('isarray')
exports.Buffer = Buffer
exports.SlowBuffer = SlowBuffer
exports.INSPECT_MAX_BYTES = 50
Buffer.poolSize = 8192 // not used by this implementation
var rootParent = {}
/**
* If `Buffer.TYPED_ARRAY_SUPPORT`:
* === true Use Uint8Array implementation (fastest)
* === false Use Object implementation (most compatible, even IE6)
*
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
* Opera 11.6+, iOS 4.2+.
*
* Due to various browser bugs, sometimes the Object implementation will be used even
* when the browser supports typed arrays.
*
* Note:
*
* - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
* See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
*
* - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
* on objects.
*
* - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
*
* - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
* incorrect length in some situations.
* We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
* get the Object implementation, which is slower but behaves correctly.
*/
Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
? global.TYPED_ARRAY_SUPPORT
: typedArraySupport()
function typedArraySupport () {
function Bar () {}
try {
var arr = new Uint8Array(1)
arr.foo = function () { return 42 }
arr.constructor = Bar
return arr.foo() === 42 && // typed array instances can be augmented
arr.constructor === Bar && // constructor can be set
typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
} catch (e) {
return false
}
}
function kMaxLength () {
return Buffer.TYPED_ARRAY_SUPPORT
? 0x7fffffff
: 0x3fffffff
}
/**
* Class: Buffer
* =============
*
* The Buffer constructor returns instances of `Uint8Array` that are augmented
* with function properties for all the node `Buffer` API functions. We use
* `Uint8Array` so that square bracket notation works as expected -- it returns
* a single octet.
*
* By augmenting the instances, we can avoid modifying the `Uint8Array`
* prototype.
*/
function Buffer (arg) {
if (!(this instanceof Buffer)) {
// Avoid going through an ArgumentsAdaptorTrampoline in the common case.
if (arguments.length > 1) return new Buffer(arg, arguments[1])
return new Buffer(arg)
}
if (!Buffer.TYPED_ARRAY_SUPPORT) {
this.length = 0
this.parent = undefined
}
// Common case.
if (typeof arg === 'number') {
return fromNumber(this, arg)
}
// Slightly less common case.
if (typeof arg === 'string') {
return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
}
// Unusual.
return fromObject(this, arg)
}
function fromNumber (that, length) {
that = allocate(that, length < 0 ? 0 : checked(length) | 0)
if (!Buffer.TYPED_ARRAY_SUPPORT) {
for (var i = 0; i < length; i++) {
that[i] = 0
}
}
return that
}
function fromString (that, string, encoding) {
if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'
// Assumption: byteLength() return value is always < kMaxLength.
var length = byteLength(string, encoding) | 0
that = allocate(that, length)
that.write(string, encoding)
return that
}
function fromObject (that, object) {
if (Buffer.isBuffer(object)) return fromBuffer(that, object)
if (isArray(object)) return fromArray(that, object)
if (object == null) {
throw new TypeError('must start with number, buffer, array or string')
}
if (typeof ArrayBuffer !== 'undefined') {
if (object.buffer instanceof ArrayBuffer) {
return fromTypedArray(that, object)
}
if (object instanceof ArrayBuffer) {
return fromArrayBuffer(that, object)
}
}
if (object.length) return fromArrayLike(that, object)
return fromJsonObject(that, object)
}
function fromBuffer (that, buffer) {
var length = checked(buffer.length) | 0
that = allocate(that, length)
buffer.copy(that, 0, 0, length)
return that
}
function fromArray (that, array) {
var length = checked(array.length) | 0
that = allocate(that, length)
for (var i = 0; i < length; i += 1) {
that[i] = array[i] & 255
}
return that
}
// Duplicate of fromArray() to keep fromArray() monomorphic.
function fromTypedArray (that, array) {
var length = checked(array.length) | 0
that = allocate(that, length)
// Truncating the elements is probably not what people expect from typed
// arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
// of the old Buffer constructor.
for (var i = 0; i < length; i += 1) {
that[i] = array[i] & 255
}
return that
}
function fromArrayBuffer (that, array) {
if (Buffer.TYPED_ARRAY_SUPPORT) {
// Return an augmented `Uint8Array` instance, for best performance
array.byteLength
that = Buffer._augment(new Uint8Array(array))
} else {
// Fallback: Return an object instance of the Buffer class
that = fromTypedArray(that, new Uint8Array(array))
}
return that
}
function fromArrayLike (that, array) {
var length = checked(array.length) | 0
that = allocate(that, length)
for (var i = 0; i < length; i += 1) {
that[i] = array[i] & 255
}
return that
}
// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
// Returns a zero-length buffer for inputs that don't conform to the spec.
function fromJsonObject (that, object) {
var array
var length = 0
if (object.type === 'Buffer' && isArray(object.data)) {
array = object.data
length = checked(array.length) | 0
}
that = allocate(that, length)
for (var i = 0; i < length; i += 1) {
that[i] = array[i] & 255
}
return that
}
if (Buffer.TYPED_ARRAY_SUPPORT) {
Buffer.prototype.__proto__ = Uint8Array.prototype
Buffer.__proto__ = Uint8Array
} else {
// pre-set for values that may exist in the future
Buffer.prototype.length = undefined
Buffer.prototype.parent = undefined
}
function allocate (that, length) {
if (Buffer.TYPED_ARRAY_SUPPORT) {
// Return an augmented `Uint8Array` instance, for best performance
that = Buffer._augment(new Uint8Array(length))
that.__proto__ = Buffer.prototype
} else {
// Fallback: Return an object instance of the Buffer class
that.length = length
that._isBuffer = true
}
var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
if (fromPool) that.parent = rootParent
return that
}
function checked (length) {
// Note: cannot use `length < kMaxLength` here because that fails when
// length is NaN (which is otherwise coerced to zero.)
if (length >= kMaxLength()) {
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
'size: 0x' + kMaxLength().toString(16) + ' bytes')
}
return length | 0
}
function SlowBuffer (subject, encoding) {
if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)
var buf = new Buffer(subject, encoding)
delete buf.parent
return buf
}
Buffer.isBuffer = function isBuffer (b) {
return !!(b != null && b._isBuffer)
}
Buffer.compare = function compare (a, b) {
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
throw new TypeError('Arguments must be Buffers')
}
if (a === b) return 0
var x = a.length
var y = b.length
var i = 0
var len = Math.min(x, y)
while (i < len) {
if (a[i] !== b[i]) break
++i
}
if (i !== len) {
x = a[i]
y = b[i]
}
if (x < y) return -1
if (y < x) return 1
return 0
}
Buffer.isEncoding = function isEncoding (encoding) {
switch (String(encoding).toLowerCase()) {
case 'hex':
case 'utf8':
case 'utf-8':
case 'ascii':
case 'binary':
case 'base64':
case 'raw':
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return true
default:
return false
}
}
Buffer.concat = function concat (list, length) {
if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')
if (list.length === 0) {
return new Buffer(0)
}
var i
if (length === undefined) {
length = 0
for (i = 0; i < list.length; i++) {
length += list[i].length
}
}
var buf = new Buffer(length)
var pos = 0
for (i = 0; i < list.length; i++) {
var item = list[i]
item.copy(buf, pos)
pos += item.length
}
return buf
}
function byteLength (string, encoding) {
if (typeof string !== 'string') string = '' + string
var len = string.length
if (len === 0) return 0
// Use a for loop to avoid recursion
var loweredCase = false
for (;;) {
switch (encoding) {
case 'ascii':
case 'binary':
// Deprecated
case 'raw':
case 'raws':
return len
case 'utf8':
case 'utf-8':
return utf8ToBytes(string).length
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return len * 2
case 'hex':
return len >>> 1
case 'base64':
return base64ToBytes(string).length
default:
if (loweredCase) return utf8ToBytes(string).length // assume utf8
encoding = ('' + encoding).toLowerCase()
loweredCase = true
}
}
}
Buffer.byteLength = byteLength
function slowToString (encoding, start, end) {
var loweredCase = false
start = start | 0
end = end === undefined || end === Infinity ? this.length : end | 0
if (!encoding) encoding = 'utf8'
if (start < 0) start = 0
if (end > this.length) end = this.length
if (end <= start) return ''
while (true) {
switch (encoding) {
case 'hex':
return hexSlice(this, start, end)
case 'utf8':
case 'utf-8':
return utf8Slice(this, start, end)
case 'ascii':
return asciiSlice(this, start, end)
case 'binary':
return binarySlice(this, start, end)
case 'base64':
return base64Slice(this, start, end)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return utf16leSlice(this, start, end)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = (encoding + '').toLowerCase()
loweredCase = true
}
}
}
Buffer.prototype.toString = function toString () {
var length = this.length | 0
if (length === 0) return ''
if (arguments.length === 0) return utf8Slice(this, 0, length)
return slowToString.apply(this, arguments)
}
Buffer.prototype.equals = function equals (b) {
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
if (this === b) return true
return Buffer.compare(this, b) === 0
}
Buffer.prototype.inspect = function inspect () {
var str = ''
var max = exports.INSPECT_MAX_BYTES
if (this.length > 0) {
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
if (this.length > max) str += ' ... '
}
return '<Buffer ' + str + '>'
}
Buffer.prototype.compare = function compare (b) {
if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
if (this === b) return 0
return Buffer.compare(this, b)
}
Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
else if (byteOffset < -0x80000000) byteOffset = -0x80000000
byteOffset >>= 0
if (this.length === 0) return -1
if (byteOffset >= this.length) return -1
// Negative offsets start from the end of the buffer
if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
if (typeof val === 'string') {
if (val.length === 0) return -1 // special case: looking for empty string always fails
return String.prototype.indexOf.call(this, val, byteOffset)
}
if (Buffer.isBuffer(val)) {
return arrayIndexOf(this, val, byteOffset)
}
if (typeof val === 'number') {
if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
}
return arrayIndexOf(this, [ val ], byteOffset)
}
function arrayIndexOf (arr, val, byteOffset) {
var foundIndex = -1
for (var i = 0; byteOffset + i < arr.length; i++) {
if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
if (foundIndex === -1) foundIndex = i
if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
} else {
foundIndex = -1
}
}
return -1
}
throw new TypeError('val must be string, number or Buffer')
}
// `get` is deprecated
Buffer.prototype.get = function get (offset) {
console.log('.get() is deprecated. Access using array indexes instead.')
return this.readUInt8(offset)
}
// `set` is deprecated
Buffer.prototype.set = function set (v, offset) {
console.log('.set() is deprecated. Access using array indexes instead.')
return this.writeUInt8(v, offset)
}
function hexWrite (buf, string, offset, length) {
offset = Number(offset) || 0
var remaining = buf.length - offset
if (!length) {
length = remaining
} else {
length = Number(length)
if (length > remaining) {
length = remaining
}
}
// must be an even number of digits
var strLen = string.length
if (strLen % 2 !== 0) throw new Error('Invalid hex string')
if (length > strLen / 2) {
length = strLen / 2
}
for (var i = 0; i < length; i++) {
var parsed = parseInt(string.substr(i * 2, 2), 16)
if (isNaN(parsed)) throw new Error('Invalid hex string')
buf[offset + i] = parsed
}
return i
}
function utf8Write (buf, string, offset, length) {
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}
function asciiWrite (buf, string, offset, length) {
return blitBuffer(asciiToBytes(string), buf, offset, length)
}
function binaryWrite (buf, string, offset, length) {
return asciiWrite(buf, string, offset, length)
}
function base64Write (buf, string, offset, length) {
return blitBuffer(base64ToBytes(string), buf, offset, length)
}
function ucs2Write (buf, string, offset, length) {
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}
Buffer.prototype.write = function write (string, offset, length, encoding) {
// Buffer#write(string)
if (offset === undefined) {
encoding = 'utf8'
length = this.length
offset = 0
// Buffer#write(string, encoding)
} else if (length === undefined && typeof offset === 'string') {
encoding = offset
length = this.length
offset = 0
// Buffer#write(string, offset[, length][, encoding])
} else if (isFinite(offset)) {
offset = offset | 0
if (isFinite(length)) {
length = length | 0
if (encoding === undefined) encoding = 'utf8'
} else {
encoding = length
length = undefined
}
// legacy write(string, encoding, offset, length) - remove in v0.13
} else {
var swap = encoding
encoding = offset
offset = length | 0
length = swap
}
var remaining = this.length - offset
if (length === undefined || length > remaining) length = remaining
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
throw new RangeError('attempt to write outside buffer bounds')
}
if (!encoding) encoding = 'utf8'
var loweredCase = false
for (;;) {
switch (encoding) {
case 'hex':
return hexWrite(this, string, offset, length)
case 'utf8':
case 'utf-8':
return utf8Write(this, string, offset, length)
case 'ascii':
return asciiWrite(this, string, offset, length)
case 'binary':
return binaryWrite(this, string, offset, length)
case 'base64':
// Warning: maxLength not taken into account in base64Write
return base64Write(this, string, offset, length)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return ucs2Write(this, string, offset, length)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = ('' + encoding).toLowerCase()
loweredCase = true
}
}
}
Buffer.prototype.toJSON = function toJSON () {
return {
type: 'Buffer',
data: Array.prototype.slice.call(this._arr || this, 0)
}
}
function base64Slice (buf, start, end) {
if (start === 0 && end === buf.length) {
return base64.fromByteArray(buf)
} else {
return base64.fromByteArray(buf.slice(start, end))
}
}
function utf8Slice (buf, start, end) {
end = Math.min(buf.length, end)
var res = []
var i = start
while (i < end) {
var firstByte = buf[i]
var codePoint = null
var bytesPerSequence = (firstByte > 0xEF) ? 4
: (firstByte > 0xDF) ? 3
: (firstByte > 0xBF) ? 2
: 1
if (i + bytesPerSequence <= end) {
var secondByte, thirdByte, fourthByte, tempCodePoint
switch (bytesPerSequence) {
case 1:
if (firstByte < 0x80) {
codePoint = firstByte
}
break
case 2:
secondByte = buf[i + 1]
if ((secondByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
if (tempCodePoint > 0x7F) {
codePoint = tempCodePoint
}
}
break
case 3:
secondByte = buf[i + 1]
thirdByte = buf[i + 2]
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
codePoint = tempCodePoint
}
}
break
case 4:
secondByte = buf[i + 1]
thirdByte = buf[i + 2]
fourthByte = buf[i + 3]
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
codePoint = tempCodePoint
}
}
}
}
if (codePoint === null) {
// we did not generate a valid codePoint so insert a
// replacement char (U+FFFD) and advance only 1 byte
codePoint = 0xFFFD
bytesPerSequence = 1
} else if (codePoint > 0xFFFF) {
// encode to utf16 (surrogate pair dance)
codePoint -= 0x10000
res.push(codePoint >>> 10 & 0x3FF | 0xD800)
codePoint = 0xDC00 | codePoint & 0x3FF
}
res.push(codePoint)
i += bytesPerSequence
}
return decodeCodePointsArray(res)
}
// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000
function decodeCodePointsArray (codePoints) {
var len = codePoints.length
if (len <= MAX_ARGUMENTS_LENGTH) {
return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
}
// Decode in chunks to avoid "call stack size exceeded".
var res = ''
var i = 0
while (i < len) {
res += String.fromCharCode.apply(
String,
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
)
}
return res
}
function asciiSlice (buf, start, end) {
var ret = ''
end = Math.min(buf.length, end)
for (var i = start; i < end; i++) {
ret += String.fromCharCode(buf[i] & 0x7F)
}
return ret
}
function binarySlice (buf, start, end) {
var ret = ''
end = Math.min(buf.length, end)
for (var i = start; i < end; i++) {
ret += String.fromCharCode(buf[i])
}
return ret
}
function hexSlice (buf, start, end) {
var len = buf.length
if (!start || start < 0) start = 0
if (!end || end < 0 || end > len) end = len
var out = ''
for (var i = start; i < end; i++) {
out += toHex(buf[i])
}
return out
}
function utf16leSlice (buf, start, end) {
var bytes = buf.slice(start, end)
var res = ''
for (var i = 0; i < bytes.length; i += 2) {
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
}
return res
}
Buffer.prototype.slice = function slice (start, end) {
var len = this.length
start = ~~start
end = end === undefined ? len : ~~end
if (start < 0) {
start += len
if (start < 0) start = 0
} else if (start > len) {
start = len
}
if (end < 0) {
end += len
if (end < 0) end = 0
} else if (end > len) {
end = len
}
if (end < start) end = start
var newBuf
if (Buffer.TYPED_ARRAY_SUPPORT) {
newBuf = Buffer._augment(this.subarray(start, end))
} else {
var sliceLen = end - start
newBuf = new Buffer(sliceLen, undefined)
for (var i = 0; i < sliceLen; i++) {
newBuf[i] = this[i + start]
}
}
if (newBuf.length) newBuf.parent = this.parent || this
return newBuf
}
/*
* Need to make sure that buffer isn't trying to write out of bounds.
*/
function checkOffset (offset, ext, length) {
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var val = this[offset]
var mul = 1
var i = 0
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul
}
return val
}
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) {
checkOffset(offset, byteLength, this.length)
}
var val = this[offset + --byteLength]
var mul = 1
while (byteLength > 0 && (mul *= 0x100)) {
val += this[offset + --byteLength] * mul
}
return val
}
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
if (!noAssert) checkOffset(offset, 1, this.length)
return this[offset]
}
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length)
return this[offset] | (this[offset + 1] << 8)
}
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length)
return (this[offset] << 8) | this[offset + 1]
}
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return ((this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16)) +
(this[offset + 3] * 0x1000000)
}
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset] * 0x1000000) +
((this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3])
}
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var val = this[offset]
var mul = 1
var i = 0
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul
}
mul *= 0x80
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
return val
}
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) checkOffset(offset, byteLength, this.length)
var i = byteLength
var mul = 1
var val = this[offset + --i]
while (i > 0 && (mul *= 0x100)) {
val += this[offset + --i] * mul
}
mul *= 0x80
if (val >= mul) val -= Math.pow(2, 8 * byteLength)
return val
}
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
if (!noAssert) checkOffset(offset, 1, this.length)
if (!(this[offset] & 0x80)) return (this[offset])
return ((0xff - this[offset] + 1) * -1)
}
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length)
var val = this[offset] | (this[offset + 1] << 8)
return (val & 0x8000) ? val | 0xFFFF0000 : val
}
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length)
var val = this[offset + 1] | (this[offset] << 8)
return (val & 0x8000) ? val | 0xFFFF0000 : val
}
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16) |
(this[offset + 3] << 24)
}
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return (this[offset] << 24) |
(this[offset + 1] << 16) |
(this[offset + 2] << 8) |
(this[offset + 3])
}
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return ieee754.read(this, offset, true, 23, 4)
}
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length)
return ieee754.read(this, offset, false, 23, 4)
}
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 8, this.length)
return ieee754.read(this, offset, true, 52, 8)
}
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 8, this.length)
return ieee754.read(this, offset, false, 52, 8)
}
function checkInt (buf, value, offset, ext, max, min) {
if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
if (value > max || value < min) throw new RangeError('value is out of bounds')
if (offset + ext > buf.length) throw new RangeError('index out of range')
}
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
value = +value
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
var mul = 1
var i = 0
this[offset] = value & 0xFF
while (++i < byteLength && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
value = +value
offset = offset | 0
byteLength = byteLength | 0
if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
var i = byteLength - 1
var mul = 1
this[offset + i] = value & 0xFF
while (--i >= 0 && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
this[offset] = (value & 0xff)
return offset + 1
}
function objectWriteUInt16 (buf, value, offset, littleEndian) {
if (value < 0) value = 0xffff + value + 1
for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
(littleEndian ? i : 1 - i) * 8
}
}
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
} else {
objectWriteUInt16(this, value, offset, true)
}
return offset + 2
}
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 8)
this[offset + 1] = (value & 0xff)
} else {
objectWriteUInt16(this, value, offset, false)
}
return offset + 2
}
function objectWriteUInt32 (buf, value, offset, littleEndian) {
if (value < 0) value = 0xffffffff + value + 1
for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
}
}
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset + 3] = (value >>> 24)
this[offset + 2] = (value >>> 16)
this[offset + 1] = (value >>> 8)
this[offset] = (value & 0xff)
} else {
objectWriteUInt32(this, value, offset, true)
}
return offset + 4
}
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 24)
this[offset + 1] = (value >>> 16)
this[offset + 2] = (value >>> 8)
this[offset + 3] = (value & 0xff)
} else {
objectWriteUInt32(this, value, offset, false)
}
return offset + 4
}
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1)
checkInt(this, value, offset, byteLength, limit - 1, -limit)
}
var i = 0
var mul = 1
var sub = value < 0 ? 1 : 0
this[offset] = value & 0xFF
while (++i < byteLength && (mul *= 0x100)) {
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1)
checkInt(this, value, offset, byteLength, limit - 1, -limit)
}
var i = byteLength - 1
var mul = 1
var sub = value < 0 ? 1 : 0
this[offset + i] = value & 0xFF
while (--i >= 0 && (mul *= 0x100)) {
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
}
return offset + byteLength
}
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
if (value < 0) value = 0xff + value + 1
this[offset] = (value & 0xff)
return offset + 1
}
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
} else {
objectWriteUInt16(this, value, offset, true)
}
return offset + 2
}
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 8)
this[offset + 1] = (value & 0xff)
} else {
objectWriteUInt16(this, value, offset, false)
}
return offset + 2
}
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff)
this[offset + 1] = (value >>> 8)
this[offset + 2] = (value >>> 16)
this[offset + 3] = (value >>> 24)
} else {
objectWriteUInt32(this, value, offset, true)
}
return offset + 4
}
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
value = +value
offset = offset | 0
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
if (value < 0) value = 0xffffffff + value + 1
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 24)
this[offset + 1] = (value >>> 16)
this[offset + 2] = (value >>> 8)
this[offset + 3] = (value & 0xff)
} else {
objectWriteUInt32(this, value, offset, false)
}
return offset + 4
}
function checkIEEE754 (buf, value, offset, ext, max, min) {
if (value > max || value < min) throw new RangeError('value is out of bounds')
if (offset + ext > buf.length) throw new RangeError('index out of range')
if (offset < 0) throw new RangeError('index out of range')
}
function writeFloat (buf, value, offset, littleEndian, noAssert) {
if (!noAssert) {
checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
}
ieee754.write(buf, value, offset, littleEndian, 23, 4)
return offset + 4
}
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
return writeFloat(this, value, offset, true, noAssert)
}
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
return writeFloat(this, value, offset, false, noAssert)
}
function writeDouble (buf, value, offset, littleEndian, noAssert) {
if (!noAssert) {
checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
}
ieee754.write(buf, value, offset, littleEndian, 52, 8)
return offset + 8
}
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
return writeDouble(this, value, offset, true, noAssert)
}
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
return writeDouble(this, value, offset, false, noAssert)
}
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
if (!start) start = 0
if (!end && end !== 0) end = this.length
if (targetStart >= target.length) targetStart = target.length
if (!targetStart) targetStart = 0
if (end > 0 && end < start) end = start
// Copy 0 bytes; we're done
if (end === start) return 0
if (target.length === 0 || this.length === 0) return 0
// Fatal error conditions
if (targetStart < 0) {
throw new RangeError('targetStart out of bounds')
}
if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
if (end < 0) throw new RangeError('sourceEnd out of bounds')
// Are we oob?
if (end > this.length) end = this.length
if (target.length - targetStart < end - start) {
end = target.length - targetStart + start
}
var len = end - start
var i
if (this === target && start < targetStart && targetStart < end) {
// descending copy from end
for (i = len - 1; i >= 0; i--) {
target[i + targetStart] = this[i + start]
}
} else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
// ascending copy from start
for (i = 0; i < len; i++) {
target[i + targetStart] = this[i + start]
}
} else {
target._set(this.subarray(start, start + len), targetStart)
}
return len
}
// fill(value, start=0, end=buffer.length)
Buffer.prototype.fill = function fill (value, start, end) {
if (!value) value = 0
if (!start) start = 0
if (!end) end = this.length
if (end < start) throw new RangeError('end < start')
// Fill 0 bytes; we're done
if (end === start) return
if (this.length === 0) return
if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
if (end < 0 || end > this.length) throw new RangeError('end out of bounds')
var i
if (typeof value === 'number') {
for (i = start; i < end; i++) {
this[i] = value
}
} else {
var bytes = utf8ToBytes(value.toString())
var len = bytes.length
for (i = start; i < end; i++) {
this[i] = bytes[i % len]
}
}
return this
}
/**
* Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
* Added in Node 0.12. Only available in browsers that support ArrayBuffer.
*/
Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
if (typeof Uint8Array !== 'undefined') {
if (Buffer.TYPED_ARRAY_SUPPORT) {
return (new Buffer(this)).buffer
} else {
var buf = new Uint8Array(this.length)
for (var i = 0, len = buf.length; i < len; i += 1) {
buf[i] = this[i]
}
return buf.buffer
}
} else {
throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
}
}
// HELPER FUNCTIONS
// ================
var BP = Buffer.prototype
/**
* Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
*/
Buffer._augment = function _augment (arr) {
arr.constructor = Buffer
arr._isBuffer = true
// save reference to original Uint8Array set method before overwriting
arr._set = arr.set
// deprecated
arr.get = BP.get
arr.set = BP.set
arr.write = BP.write
arr.toString = BP.toString
arr.toLocaleString = BP.toString
arr.toJSON = BP.toJSON
arr.equals = BP.equals
arr.compare = BP.compare
arr.indexOf = BP.indexOf
arr.copy = BP.copy
arr.slice = BP.slice
arr.readUIntLE = BP.readUIntLE
arr.readUIntBE = BP.readUIntBE
arr.readUInt8 = BP.readUInt8
arr.readUInt16LE = BP.readUInt16LE
arr.readUInt16BE = BP.readUInt16BE
arr.readUInt32LE = BP.readUInt32LE
arr.readUInt32BE = BP.readUInt32BE
arr.readIntLE = BP.readIntLE
arr.readIntBE = BP.readIntBE
arr.readInt8 = BP.readInt8
arr.readInt16LE = BP.readInt16LE
arr.readInt16BE = BP.readInt16BE
arr.readInt32LE = BP.readInt32LE
arr.readInt32BE = BP.readInt32BE
arr.readFloatLE = BP.readFloatLE
arr.readFloatBE = BP.readFloatBE
arr.readDoubleLE = BP.readDoubleLE
arr.readDoubleBE = BP.readDoubleBE
arr.writeUInt8 = BP.writeUInt8
arr.writeUIntLE = BP.writeUIntLE
arr.writeUIntBE = BP.writeUIntBE
arr.writeUInt16LE = BP.writeUInt16LE
arr.writeUInt16BE = BP.writeUInt16BE
arr.writeUInt32LE = BP.writeUInt32LE
arr.writeUInt32BE = BP.writeUInt32BE
arr.writeIntLE = BP.writeIntLE
arr.writeIntBE = BP.writeIntBE
arr.writeInt8 = BP.writeInt8
arr.writeInt16LE = BP.writeInt16LE
arr.writeInt16BE = BP.writeInt16BE
arr.writeInt32LE = BP.writeInt32LE
arr.writeInt32BE = BP.writeInt32BE
arr.writeFloatLE = BP.writeFloatLE
arr.writeFloatBE = BP.writeFloatBE
arr.writeDoubleLE = BP.writeDoubleLE
arr.writeDoubleBE = BP.writeDoubleBE
arr.fill = BP.fill
arr.inspect = BP.inspect
arr.toArrayBuffer = BP.toArrayBuffer
return arr
}
var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
function base64clean (str) {
// Node strips out invalid characters like \n and \t from the string, base64-js does not
str = stringtrim(str).replace(INVALID_BASE64_RE, '')
// Node converts strings with length < 2 to ''
if (str.length < 2) return ''
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
while (str.length % 4 !== 0) {
str = str + '='
}
return str
}
function stringtrim (str) {
if (str.trim) return str.trim()
return str.replace(/^\s+|\s+$/g, '')
}
function toHex (n) {
if (n < 16) return '0' + n.toString(16)
return n.toString(16)
}
function utf8ToBytes (string, units) {
units = units || Infinity
var codePoint
var length = string.length
var leadSurrogate = null
var bytes = []
for (var i = 0; i < length; i++) {
codePoint = string.charCodeAt(i)
// is surrogate component
if (codePoint > 0xD7FF && codePoint < 0xE000) {
// last char was a lead
if (!leadSurrogate) {
// no lead yet
if (codePoint > 0xDBFF) {
// unexpected trail
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
continue
} else if (i + 1 === length) {
// unpaired lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
continue
}
// valid lead
leadSurrogate = codePoint
continue
}
// 2 leads in a row
if (codePoint < 0xDC00) {
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
leadSurrogate = codePoint
continue
}
// valid surrogate pair
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
} else if (leadSurrogate) {
// valid bmp char, but last char was a lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
}
leadSurrogate = null
// encode utf8
if (codePoint < 0x80) {
if ((units -= 1) < 0) break
bytes.push(codePoint)
} else if (codePoint < 0x800) {
if ((units -= 2) < 0) break
bytes.push(
codePoint >> 0x6 | 0xC0,
codePoint & 0x3F | 0x80
)
} else if (codePoint < 0x10000) {
if ((units -= 3) < 0) break
bytes.push(
codePoint >> 0xC | 0xE0,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
)
} else if (codePoint < 0x110000) {
if ((units -= 4) < 0) break
bytes.push(
codePoint >> 0x12 | 0xF0,
codePoint >> 0xC & 0x3F | 0x80,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
)
} else {
throw new Error('Invalid code point')
}
}
return bytes
}
function asciiToBytes (str) {
var byteArray = []
for (var i = 0; i < str.length; i++) {
// Node's code seems to be doing this and not & 0x7F..
byteArray.push(str.charCodeAt(i) & 0xFF)
}
return byteArray
}
function utf16leToBytes (str, units) {
var c, hi, lo
var byteArray = []
for (var i = 0; i < str.length; i++) {
if ((units -= 2) < 0) break
c = str.charCodeAt(i)
hi = c >> 8
lo = c % 256
byteArray.push(lo)
byteArray.push(hi)
}
return byteArray
}
function base64ToBytes (str) {
return base64.toByteArray(base64clean(str))
}
function blitBuffer (src, dst, offset, length) {
for (var i = 0; i < length; i++) {
if ((i + offset >= dst.length) || (i >= src.length)) break
dst[i + offset] = src[i]
}
return i
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
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* The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\nBuffer.poolSize = 8192 // not used by this implementation\n\nvar rootParent = {}\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property\n *     on objects.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\nfunction typedArraySupport () {\n  function Bar () {}\n  try {\n    var arr = new Uint8Array(1)\n    arr.foo = function () { return 42 }\n    arr.constructor = Bar\n    return arr.foo() === 42 && // typed array instances can be augmented\n        arr.constructor === Bar && // constructor can be set\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\n/**\n * Class: Buffer\n * =============\n *\n * The Buffer constructor returns instances of `Uint8Array` that are augmented\n * with function properties for all the node `Buffer` API functions. We use\n * `Uint8Array` so that square bracket notation works as expected -- it returns\n * a single octet.\n *\n * By augmenting the instances, we can avoid modifying the `Uint8Array`\n * prototype.\n */\nfunction Buffer (arg) {\n  if (!(this instanceof Buffer)) {\n    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.\n    if (arguments.length > 1) return new Buffer(arg, arguments[1])\n    return new Buffer(arg)\n  }\n\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    this.length = 0\n    this.parent = undefined\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    return fromNumber(this, arg)\n  }\n\n  // Slightly less common case.\n  if (typeof arg === 'string') {\n    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')\n  }\n\n  // Unusual.\n  return fromObject(this, arg)\n}\n\nfunction fromNumber (that, length) {\n  that = allocate(that, length < 0 ? 0 : checked(length) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < length; i++) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'\n\n  // Assumption: byteLength() return value is always < kMaxLength.\n  var length = byteLength(string, encoding) | 0\n  that = allocate(that, length)\n\n  that.write(string, encoding)\n  return that\n}\n\nfunction fromObject (that, object) {\n  if (Buffer.isBuffer(object)) return fromBuffer(that, object)\n\n  if (isArray(object)) return fromArray(that, object)\n\n  if (object == null) {\n    throw new TypeError('must start with number, buffer, array or string')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined') {\n    if (object.buffer instanceof ArrayBuffer) {\n      return fromTypedArray(that, object)\n    }\n    if (object instanceof ArrayBuffer) {\n      return fromArrayBuffer(that, object)\n    }\n  }\n\n  if (object.length) return fromArrayLike(that, object)\n\n  return fromJsonObject(that, object)\n}\n\nfunction fromBuffer (that, buffer) {\n  var length = checked(buffer.length) | 0\n  that = allocate(that, length)\n  buffer.copy(that, 0, 0, length)\n  return that\n}\n\nfunction fromArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Duplicate of fromArray() to keep fromArray() monomorphic.\nfunction fromTypedArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  // Truncating the elements is probably not what people expect from typed\n  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior\n  // of the old Buffer constructor.\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    array.byteLength\n    that = Buffer._augment(new Uint8Array(array))\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromTypedArray(that, new Uint8Array(array))\n  }\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.\n// Returns a zero-length buffer for inputs that don't conform to the spec.\nfunction fromJsonObject (that, object) {\n  var array\n  var length = 0\n\n  if (object.type === 'Buffer' && isArray(object.data)) {\n    array = object.data\n    length = checked(array.length) | 0\n  }\n  that = allocate(that, length)\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n} else {\n  // pre-set for values that may exist in the future\n  Buffer.prototype.length = undefined\n  Buffer.prototype.parent = undefined\n}\n\nfunction allocate (that, length) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = Buffer._augment(new Uint8Array(length))\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that.length = length\n    that._isBuffer = true\n  }\n\n  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1\n  if (fromPool) that.parent = rootParent\n\n  return that\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (subject, encoding) {\n  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)\n\n  var buf = new Buffer(subject, encoding)\n  delete buf.parent\n  return buf\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  var i = 0\n  var len = Math.min(x, y)\n  while (i < len) {\n    if (a[i] !== b[i]) break\n\n    ++i\n  }\n\n  if (i !== len) {\n    x = a[i]\n    y = b[i]\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'raw':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')\n\n  if (list.length === 0) {\n    return new Buffer(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; i++) {\n      length += list[i].length\n    }\n  }\n\n  var buf = new Buffer(length)\n  var pos = 0\n  for (i = 0; i < list.length; i++) {\n    var item = list[i]\n    item.copy(buf, pos)\n    pos += item.length\n  }\n  return buf\n}\n\nfunction byteLength (string, encoding) {\n  if (typeof string !== 'string') string = '' + string\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'binary':\n      // Deprecated\n      case 'raw':\n      case 'raws':\n        return len\n      case 'utf8':\n      case 'utf-8':\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  start = start | 0\n  end = end === undefined || end === Infinity ? this.length : end | 0\n\n  if (!encoding) encoding = 'utf8'\n  if (start < 0) start = 0\n  if (end > this.length) end = this.length\n  if (end <= start) return ''\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'binary':\n        return binarySlice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return 0\n  return Buffer.compare(this, b)\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset) {\n  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff\n  else if (byteOffset < -0x80000000) byteOffset = -0x80000000\n  byteOffset >>= 0\n\n  if (this.length === 0) return -1\n  if (byteOffset >= this.length) return -1\n\n  // Negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)\n\n  if (typeof val === 'string') {\n    if (val.length === 0) return -1 // special case: looking for empty string always fails\n    return String.prototype.indexOf.call(this, val, byteOffset)\n  }\n  if (Buffer.isBuffer(val)) {\n    return arrayIndexOf(this, val, byteOffset)\n  }\n  if (typeof val === 'number') {\n    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {\n      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)\n    }\n    return arrayIndexOf(this, [ val ], byteOffset)\n  }\n\n  function arrayIndexOf (arr, val, byteOffset) {\n    var foundIndex = -1\n    for (var i = 0; byteOffset + i < arr.length; i++) {\n      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex\n      } else {\n        foundIndex = -1\n      }\n    }\n    return -1\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\n// `get` is deprecated\nBuffer.prototype.get = function get (offset) {\n  console.log('.get() is deprecated. Access using array indexes instead.')\n  return this.readUInt8(offset)\n}\n\n// `set` is deprecated\nBuffer.prototype.set = function set (v, offset) {\n  console.log('.set() is deprecated. Access using array indexes instead.')\n  return this.writeUInt8(v, offset)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new Error('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; i++) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) throw new Error('Invalid hex string')\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction binaryWrite (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    var swap = encoding\n    encoding = offset\n    offset = length | 0\n    length = swap\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'binary':\n        return binaryWrite(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction binarySlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; i++) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = Buffer._augment(this.subarray(start, end))\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; i++) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  if (newBuf.length) newBuf.parent = this.parent || this\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n  if (offset < 0) throw new RangeError('index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; i--) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; i++) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    target._set(this.subarray(start, start + len), targetStart)\n  }\n\n  return len\n}\n\n// fill(value, start=0, end=buffer.length)\nBuffer.prototype.fill = function fill (value, start, end) {\n  if (!value) value = 0\n  if (!start) start = 0\n  if (!end) end = this.length\n\n  if (end < start) throw new RangeError('end < start')\n\n  // Fill 0 bytes; we're done\n  if (end === start) return\n  if (this.length === 0) return\n\n  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')\n  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')\n\n  var i\n  if (typeof value === 'number') {\n    for (i = start; i < end; i++) {\n      this[i] = value\n    }\n  } else {\n    var bytes = utf8ToBytes(value.toString())\n    var len = bytes.length\n    for (i = start; i < end; i++) {\n      this[i] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n/**\n * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.\n * Added in Node 0.12. Only available in browsers that support ArrayBuffer.\n */\nBuffer.prototype.toArrayBuffer = function toArrayBuffer () {\n  if (typeof Uint8Array !== 'undefined') {\n    if (Buffer.TYPED_ARRAY_SUPPORT) {\n      return (new Buffer(this)).buffer\n    } else {\n      var buf = new Uint8Array(this.length)\n      for (var i = 0, len = buf.length; i < len; i += 1) {\n        buf[i] = this[i]\n      }\n      return buf.buffer\n    }\n  } else {\n    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')\n  }\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar BP = Buffer.prototype\n\n/**\n * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods\n */\nBuffer._augment = function _augment (arr) {\n  arr.constructor = Buffer\n  arr._isBuffer = true\n\n  // save reference to original Uint8Array set method before overwriting\n  arr._set = arr.set\n\n  // deprecated\n  arr.get = BP.get\n  arr.set = BP.set\n\n  arr.write = BP.write\n  arr.toString = BP.toString\n  arr.toLocaleString = BP.toString\n  arr.toJSON = BP.toJSON\n  arr.equals = BP.equals\n  arr.compare = BP.compare\n  arr.indexOf = BP.indexOf\n  arr.copy = BP.copy\n  arr.slice = BP.slice\n  arr.readUIntLE = BP.readUIntLE\n  arr.readUIntBE = BP.readUIntBE\n  arr.readUInt8 = BP.readUInt8\n  arr.readUInt16LE = BP.readUInt16LE\n  arr.readUInt16BE = BP.readUInt16BE\n  arr.readUInt32LE = BP.readUInt32LE\n  arr.readUInt32BE = BP.readUInt32BE\n  arr.readIntLE = BP.readIntLE\n  arr.readIntBE = BP.readIntBE\n  arr.readInt8 = BP.readInt8\n  arr.readInt16LE = BP.readInt16LE\n  arr.readInt16BE = BP.readInt16BE\n  arr.readInt32LE = BP.readInt32LE\n  arr.readInt32BE = BP.readInt32BE\n  arr.readFloatLE = BP.readFloatLE\n  arr.readFloatBE = BP.readFloatBE\n  arr.readDoubleLE = BP.readDoubleLE\n  arr.readDoubleBE = BP.readDoubleBE\n  arr.writeUInt8 = BP.writeUInt8\n  arr.writeUIntLE = BP.writeUIntLE\n  arr.writeUIntBE = BP.writeUIntBE\n  arr.writeUInt16LE = BP.writeUInt16LE\n  arr.writeUInt16BE = BP.writeUInt16BE\n  arr.writeUInt32LE = BP.writeUInt32LE\n  arr.writeUInt32BE = BP.writeUInt32BE\n  arr.writeIntLE = BP.writeIntLE\n  arr.writeIntBE = BP.writeIntBE\n  arr.writeInt8 = BP.writeInt8\n  arr.writeInt16LE = BP.writeInt16LE\n  arr.writeInt16BE = BP.writeInt16BE\n  arr.writeInt32LE = BP.writeInt32LE\n  arr.writeInt32BE = BP.writeInt32BE\n  arr.writeFloatLE = BP.writeFloatLE\n  arr.writeFloatBE = BP.writeFloatBE\n  arr.writeDoubleLE = BP.writeDoubleLE\n  arr.writeDoubleBE = BP.writeDoubleBE\n  arr.fill = BP.fill\n  arr.inspect = BP.inspect\n  arr.toArrayBuffer = BP.toArrayBuffer\n\n  return arr\n}\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; i++) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; i++) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n"]}
},{"base64-js":2,"ieee754":3,"isarray":4}],2:[function(require,module,exports){
var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
;(function (exports) {
'use strict';
var Arr = (typeof Uint8Array !== 'undefined')
? Uint8Array
: Array
var PLUS = '+'.charCodeAt(0)
var SLASH = '/'.charCodeAt(0)
var NUMBER = '0'.charCodeAt(0)
var LOWER = 'a'.charCodeAt(0)
var UPPER = 'A'.charCodeAt(0)
var PLUS_URL_SAFE = '-'.charCodeAt(0)
var SLASH_URL_SAFE = '_'.charCodeAt(0)
function decode (elt) {
var code = elt.charCodeAt(0)
if (code === PLUS ||
code === PLUS_URL_SAFE)
return 62 // '+'
if (code === SLASH ||
code === SLASH_URL_SAFE)
return 63 // '/'
if (code < NUMBER)
return -1 //no match
if (code < NUMBER + 10)
return code - NUMBER + 26 + 26
if (code < UPPER + 26)
return code - UPPER
if (code < LOWER + 26)
return code - LOWER + 26
}
function b64ToByteArray (b64) {
var i, j, l, tmp, placeHolders, arr
if (b64.length % 4 > 0) {
throw new Error('Invalid string. Length must be a multiple of 4')
}
// the number of equal signs (place holders)
// if there are two placeholders, than the two characters before it
// represent one byte
// if there is only one, then the three characters before it represent 2 bytes
// this is just a cheap hack to not do indexOf twice
var len = b64.length
placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
// base64 is 4/3 + up to two characters of the original data
arr = new Arr(b64.length * 3 / 4 - placeHolders)
// if there are placeholders, only get up to the last complete 4 chars
l = placeHolders > 0 ? b64.length - 4 : b64.length
var L = 0
function push (v) {
arr[L++] = v
}
for (i = 0, j = 0; i < l; i += 4, j += 3) {
tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
push((tmp & 0xFF0000) >> 16)
push((tmp & 0xFF00) >> 8)
push(tmp & 0xFF)
}
if (placeHolders === 2) {
tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
push(tmp & 0xFF)
} else if (placeHolders === 1) {
tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
push((tmp >> 8) & 0xFF)
push(tmp & 0xFF)
}
return arr
}
function uint8ToBase64 (uint8) {
var i,
extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
output = "",
temp, length
function encode (num) {
return lookup.charAt(num)
}
function tripletToBase64 (num) {
return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
}
// go through the array every three bytes, we'll deal with trailing stuff later
for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
output += tripletToBase64(temp)
}
// pad the end with zeros, but make sure to not forget the extra bytes
switch (extraBytes) {
case 1:
temp = uint8[uint8.length - 1]
output += encode(temp >> 2)
output += encode((temp << 4) & 0x3F)
output += '=='
break
case 2:
temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
output += encode(temp >> 10)
output += encode((temp >> 4) & 0x3F)
output += encode((temp << 2) & 0x3F)
output += '='
break
}
return output
}
exports.toByteArray = b64ToByteArray
exports.fromByteArray = uint8ToBase64
}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
},{}],3:[function(require,module,exports){
exports.read = function (buffer, offset, isLE, mLen, nBytes) {
var e, m
var eLen = nBytes * 8 - mLen - 1
var eMax = (1 << eLen) - 1
var eBias = eMax >> 1
var nBits = -7
var i = isLE ? (nBytes - 1) : 0
var d = isLE ? -1 : 1
var s = buffer[offset + i]
i += d
e = s & ((1 << (-nBits)) - 1)
s >>= (-nBits)
nBits += eLen
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
m = e & ((1 << (-nBits)) - 1)
e >>= (-nBits)
nBits += mLen
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
if (e === 0) {
e = 1 - eBias
} else if (e === eMax) {
return m ? NaN : ((s ? -1 : 1) * Infinity)
} else {
m = m + Math.pow(2, mLen)
e = e - eBias
}
return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}
exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
var e, m, c
var eLen = nBytes * 8 - mLen - 1
var eMax = (1 << eLen) - 1
var eBias = eMax >> 1
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
var i = isLE ? 0 : (nBytes - 1)
var d = isLE ? 1 : -1
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
value = Math.abs(value)
if (isNaN(value) || value === Infinity) {
m = isNaN(value) ? 1 : 0
e = eMax
} else {
e = Math.floor(Math.log(value) / Math.LN2)
if (value * (c = Math.pow(2, -e)) < 1) {
e--
c *= 2
}
if (e + eBias >= 1) {
value += rt / c
} else {
value += rt * Math.pow(2, 1 - eBias)
}
if (value * c >= 2) {
e++
c /= 2
}
if (e + eBias >= eMax) {
m = 0
e = eMax
} else if (e + eBias >= 1) {
m = (value * c - 1) * Math.pow(2, mLen)
e = e + eBias
} else {
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
e = 0
}
}
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
e = (e << mLen) | m
eLen += mLen
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
buffer[offset + i - d] |= s * 128
}
},{}],4:[function(require,module,exports){
var toString = {}.toString;
module.exports = Array.isArray || function (arr) {
return toString.call(arr) == '[object Array]';
};
},{}],5:[function(require,module,exports){
"use strict"
var fill = require('cwise/lib/wrapper')({"args":["index","array","scalar"],"pre":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"body":{"body":"{_inline_1_arg1_=_inline_1_arg2_.apply(void 0,_inline_1_arg0_)}","args":[{"name":"_inline_1_arg0_","lvalue":false,"rvalue":true,"count":1},{"name":"_inline_1_arg1_","lvalue":true,"rvalue":false,"count":1},{"name":"_inline_1_arg2_","lvalue":false,"rvalue":true,"count":1}],"thisVars":[],"localVars":[]},"post":{"body":"{}","args":[],"thisVars":[],"localVars":[]},"debug":false,"funcName":"cwise","blockSize":64})
module.exports = function(array, f) {
fill(array, f)
return array
}
},{"cwise/lib/wrapper":6}],6:[function(require,module,exports){
module.exports = require("cwise-compiler")
},{"cwise-compiler":7}],7:[function(require,module,exports){
"use strict"
var createThunk = require("./lib/thunk.js")
function Procedure() {
this.argTypes = []
this.shimArgs = []
this.arrayArgs = []
this.arrayBlockIndices = []
this.scalarArgs = []
this.offsetArgs = []
this.offsetArgIndex = []
this.indexArgs = []
this.shapeArgs = []
this.funcName = ""
this.pre = null
this.body = null
this.post = null
this.debug = false
}
function compileCwise(user_args) {
//Create procedure
var proc = new Procedure()
//Parse blocks
proc.pre = user_args.pre
proc.body = user_args.body
proc.post = user_args.post
//Parse arguments
var proc_args = user_args.args.slice(0)
proc.argTypes = proc_args
for(var i=0; i<proc_args.length; ++i) {
var arg_type = proc_args[i]
if(arg_type === "array" || (typeof arg_type === "object" && arg_type.blockIndices)) {
proc.argTypes[i] = "array"
proc.arrayArgs.push(i)
proc.arrayBlockIndices.push(arg_type.blockIndices ? arg_type.blockIndices : 0)
proc.shimArgs.push("array" + i)
if(i < proc.pre.args.length && proc.pre.args[i].count>0) {
throw new Error("cwise: pre() block may not reference array args")
}
if(i < proc.post.args.length && proc.post.args[i].count>0) {
throw new Error("cwise: post() block may not reference array args")
}
} else if(arg_type === "scalar") {
proc.scalarArgs.push(i)
proc.shimArgs.push("scalar" + i)
} else if(arg_type === "index") {
proc.indexArgs.push(i)
if(i < proc.pre.args.length && proc.pre.args[i].count > 0) {
throw new Error("cwise: pre() block may not reference array index")
}
if(i < proc.body.args.length && proc.body.args[i].lvalue) {
throw new Error("cwise: body() block may not write to array index")
}
if(i < proc.post.args.length && proc.post.args[i].count > 0) {
throw new Error("cwise: post() block may not reference array index")
}
} else if(arg_type === "shape") {
proc.shapeArgs.push(i)
if(i < proc.pre.args.length && proc.pre.args[i].lvalue) {
throw new Error("cwise: pre() block may not write to array shape")
}
if(i < proc.body.args.length && proc.body.args[i].lvalue) {
throw new Error("cwise: body() block may not write to array shape")
}
if(i < proc.post.args.length && proc.post.args[i].lvalue) {
throw new Error("cwise: post() block may not write to array shape")
}
} else if(typeof arg_type === "object" && arg_type.offset) {
proc.argTypes[i] = "offset"
proc.offsetArgs.push({ array: arg_type.array, offset:arg_type.offset })
proc.offsetArgIndex.push(i)
} else {
throw new Error("cwise: Unknown argument type " + proc_args[i])
}
}
//Make sure at least one array argument was specified
if(proc.arrayArgs.length <= 0) {
throw new Error("cwise: No array arguments specified")
}
//Make sure arguments are correct
if(proc.pre.args.length > proc_args.length) {
throw new Error("cwise: Too many arguments in pre() block")
}
if(proc.body.args.length > proc_args.length) {
throw new Error("cwise: Too many arguments in body() block")
}
if(proc.post.args.length > proc_args.length) {
throw new Error("cwise: Too many arguments in post() block")
}
//Check debug flag
proc.debug = !!user_args.printCode || !!user_args.debug
//Retrieve name
proc.funcName = user_args.funcName || "cwise"
//Read in block size
proc.blockSize = user_args.blockSize || 64
return createThunk(proc)
}
module.exports = compileCwise
},{"./lib/thunk.js":9}],8:[function(require,module,exports){
"use strict"
var uniq = require("uniq")
// This function generates very simple loops analogous to how you typically traverse arrays (the outermost loop corresponds to the slowest changing index, the innermost loop to the fastest changing index)
// TODO: If two arrays have the same strides (and offsets) there is potential for decreasing the number of "pointers" and related variables. The drawback is that the type signature would become more specific and that there would thus be less potential for caching, but it might still be worth it, especially when dealing with large numbers of arguments.
function innerFill(order, proc, body) {
var dimension = order.length
, nargs = proc.arrayArgs.length
, has_index = proc.indexArgs.length>0
, code = []
, vars = []
, idx=0, pidx=0, i, j
for(i=0; i<dimension; ++i) { // Iteration variables
vars.push(["i",i,"=0"].join(""))
}
//Compute scan deltas
for(j=0; j<nargs; ++j) {
for(i=0; i<dimension; ++i) {
pidx = idx
idx = order[i]
if(i === 0) { // The innermost/fastest dimension's delta is simply its stride
vars.push(["d",j,"s",i,"=t",j,"p",idx].join(""))
} else { // For other dimensions the delta is basically the stride minus something which essentially "rewinds" the previous (more inner) dimension
vars.push(["d",j,"s",i,"=(t",j,"p",idx,"-s",pidx,"*t",j,"p",pidx,")"].join(""))
}
}
}
code.push("var " + vars.join(","))
//Scan loop
for(i=dimension-1; i>=0; --i) { // Start at largest stride and work your way inwards
idx = order[i]
code.push(["for(i",i,"=0;i",i,"<s",idx,";++i",i,"){"].join(""))
}
//Push body of inner loop
code.push(body)
//Advance scan pointers
for(i=0; i<dimension; ++i) {
pidx = idx
idx = order[i]
for(j=0; j<nargs; ++j) {
code.push(["p",j,"+=d",j,"s",i].join(""))
}
if(has_index) {
if(i > 0) {
code.push(["index[",pidx,"]-=s",pidx].join(""))
}
code.push(["++index[",idx,"]"].join(""))
}
code.push("}")
}
return code.join("\n")
}
// Generate "outer" loops that loop over blocks of data, applying "inner" loops to the blocks by manipulating the local variables in such a way that the inner loop only "sees" the current block.
// TODO: If this is used, then the previous declaration (done by generateCwiseOp) of s* is essentially unnecessary.
// I believe the s* are not used elsewhere (in particular, I don't think they're used in the pre/post parts and "shape" is defined independently), so it would be possible to make defining the s* dependent on what loop method is being used.
function outerFill(matched, order, proc, body) {
var dimension = order.length
, nargs = proc.arrayArgs.length
, blockSize = proc.blockSize
, has_index = proc.indexArgs.length > 0
, code = []
for(var i=0; i<nargs; ++i) {
code.push(["var offset",i,"=p",i].join(""))
}
//Generate loops for unmatched dimensions
// The order in which these dimensions are traversed is fairly arbitrary (from small stride to large stride, for the first argument)
// TODO: It would be nice if the order in which these loops are placed would also be somehow "optimal" (at the very least we should check that it really doesn't hurt us if they're not).
for(var i=matched; i<dimension; ++i) {
code.push(["for(var j"+i+"=SS[", order[i], "]|0;j", i, ">0;){"].join("")) // Iterate back to front
code.push(["if(j",i,"<",blockSize,"){"].join("")) // Either decrease j by blockSize (s = blockSize), or set it to zero (after setting s = j).
code.push(["s",order[i],"=j",i].join(""))
code.push(["j",i,"=0"].join(""))
code.push(["}else{s",order[i],"=",blockSize].join(""))
code.push(["j",i,"-=",blockSize,"}"].join(""))
if(has_index) {
code.push(["index[",order[i],"]=j",i].join(""))
}
}
for(var i=0; i<nargs; ++i) {
var indexStr = ["offset"+i]
for(var j=matched; j<dimension; ++j) {
indexStr.push(["j",j,"*t",i,"p",order[j]].join(""))
}
code.push(["p",i,"=(",indexStr.join("+"),")"].join(""))
}
code.push(innerFill(order, proc, body))
for(var i=matched; i<dimension; ++i) {
code.push("}")
}
return code.join("\n")
}
//Count the number of compatible inner orders
// This is the length of the longest common prefix of the arrays in orders.
// Each array in orders lists the dimensions of the correspond ndarray in order of increasing stride.
// This is thus the maximum number of dimensions that can be efficiently traversed by simple nested loops for all arrays.
function countMatches(orders) {
var matched = 0, dimension = orders[0].length
while(matched < dimension) {
for(var j=1; j<orders.length; ++j) {
if(orders[j][matched] !== orders[0][matched]) {
return matched
}
}
++matched
}
return matched
}
//Processes a block according to the given data types
// Replaces variable names by different ones, either "local" ones (that are then ferried in and out of the given array) or ones matching the arguments that the function performing the ultimate loop will accept.
function processBlock(block, proc, dtypes) {
var code = block.body
var pre = []
var post = []
for(var i=0; i<block.args.length; ++i) {
var carg = block.args[i]
if(carg.count <= 0) {
continue
}
var re = new RegExp(carg.name, "g")
var ptrStr = ""
var arrNum = proc.arrayArgs.indexOf(i)
switch(proc.argTypes[i]) {
case "offset":
var offArgIndex = proc.offsetArgIndex.indexOf(i)
var offArg = proc.offsetArgs[offArgIndex]
arrNum = offArg.array
ptrStr = "+q" + offArgIndex // Adds offset to the "pointer" in the array
case "array":
ptrStr = "p" + arrNum + ptrStr
var localStr = "l" + i
var arrStr = "a" + arrNum
if (proc.arrayBlockIndices[arrNum] === 0) { // Argument to body is just a single value from this array
if(carg.count === 1) { // Argument/array used only once(?)
if(dtypes[arrNum] === "generic") {
if(carg.lvalue) {
pre.push(["var ", localStr, "=", arrStr, ".get(", ptrStr, ")"].join("")) // Is this necessary if the argument is ONLY used as an lvalue? (keep in mind that we can have a += something, so we would actually need to check carg.rvalue)
code = code.replace(re, localStr)
post.push([arrStr, ".set(", ptrStr, ",", localStr,")"].join(""))
} else {
code = code.replace(re, [arrStr, ".get(", ptrStr, ")"].join(""))
}
} else {
code = code.replace(re, [arrStr, "[", ptrStr, "]"].join(""))
}
} else if(dtypes[arrNum] === "generic") {
pre.push(["var ", localStr, "=", arrStr, ".get(", ptrStr, ")"].join("")) // TODO: Could we optimize by checking for carg.rvalue?
code = code.replace(re, localStr)
if(carg.lvalue) {
post.push([arrStr, ".set(", ptrStr, ",", localStr,")"].join(""))
}
} else {
pre.push(["var ", localStr, "=", arrStr, "[", ptrStr, "]"].join("")) // TODO: Could we optimize by checking for carg.rvalue?
code = code.replace(re, localStr)
if(carg.lvalue) {
post.push([arrStr, "[", ptrStr, "]=", localStr].join(""))
}
}
} else { // Argument to body is a "block"
var reStrArr = [carg.name], ptrStrArr = [ptrStr]
for(var j=0; j<Math.abs(proc.arrayBlockIndices[arrNum]); j++) {
reStrArr.push("\\s*\\[([^\\]]+)\\]")
ptrStrArr.push("$" + (j+1) + "*t" + arrNum + "b" + j) // Matched index times stride
}
re = new RegExp(reStrArr.join(""), "g")
ptrStr = ptrStrArr.join("+")
if(dtypes[arrNum] === "generic") {
/*if(carg.lvalue) {
pre.push(["var ", localStr, "=", arrStr, ".get(", ptrStr, ")"].join("")) // Is this necessary if the argument is ONLY used as an lvalue? (keep in mind that we can have a += something, so we would actually need to check carg.rvalue)
code = code.replace(re, localStr)
post.push([arrStr, ".set(", ptrStr, ",", localStr,")"].join(""))
} else {
code = code.replace(re, [arrStr, ".get(", ptrStr, ")"].join(""))
}*/
throw new Error("cwise: Generic arrays not supported in combination with blocks!")
} else {
// This does not produce any local variables, even if variables are used multiple times. It would be possible to do so, but it would complicate things quite a bit.
code = code.replace(re, [arrStr, "[", ptrStr, "]"].join(""))
}
}
break
case "scalar":
code = code.replace(re, "Y" + proc.scalarArgs.indexOf(i))
break
case "index":
code = code.replace(re, "index")
break
case "shape":
code = code.replace(re, "shape")
break
}
}
return [pre.join("\n"), code, post.join("\n")].join("\n").trim()
}
function typeSummary(dtypes) {
var summary = new Array(dtypes.length)
var allEqual = true
for(var i=0; i<dtypes.length; ++i) {
var t = dtypes[i]
var digits = t.match(/\d+/)
if(!digits) {
digits = ""
} else {
digits = digits[0]
}
if(t.charAt(0) === 0) {
summary[i] = "u" + t.charAt(1) + digits
} else {
summary[i] = t.charAt(0) + digits
}
if(i > 0) {
allEqual = allEqual && summary[i] === summary[i-1]
}
}
if(allEqual) {
return summary[0]
}
return summary.join("")
}
//Generates a cwise operator
function generateCWiseOp(proc, typesig) {
//Compute dimension
// Arrays get put first in typesig, and there are two entries per array (dtype and order), so this gets the number of dimensions in the first array arg.
var dimension = (typesig[1].length - Math.abs(proc.arrayBlockIndices[0]))|0
var orders = new Array(proc.arrayArgs.length)
var dtypes = new Array(proc.arrayArgs.length)
for(var i=0; i<proc.arrayArgs.length; ++i) {
dtypes[i] = typesig[2*i]
orders[i] = typesig[2*i+1]
}
//Determine where block and loop indices start and end
var blockBegin = [], blockEnd = [] // These indices are exposed as blocks
var loopBegin = [], loopEnd = [] // These indices are iterated over
var loopOrders = [] // orders restricted to the loop indices
for(var i=0; i<proc.arrayArgs.length; ++i) {
if (proc.arrayBlockIndices[i]<0) {
loopBegin.push(0)
loopEnd.push(dimension)
blockBegin.push(dimension)
blockEnd.push(dimension+proc.arrayBlockIndices[i])
} else {
loopBegin.push(proc.arrayBlockIndices[i]) // Non-negative
loopEnd.push(proc.arrayBlockIndices[i]+dimension)
blockBegin.push(0)
blockEnd.push(proc.arrayBlockIndices[i])
}
var newOrder = []
for(var j=0; j<orders[i].length; j++) {
if (loopBegin[i]<=orders[i][j] && orders[i][j]<loopEnd[i]) {
newOrder.push(orders[i][j]-loopBegin[i]) // If this is a loop index, put it in newOrder, subtracting loopBegin, to make sure that all loopOrders are using a common set of indices.
}
}
loopOrders.push(newOrder)
}
//First create arguments for procedure
var arglist = ["SS"] // SS is the overall shape over which we iterate
var code = ["'use strict'"]
var vars = []
for(var j=0; j<dimension; ++j) {
vars.push(["s", j, "=SS[", j, "]"].join("")) // The limits for each dimension.
}
for(var i=0; i<proc.arrayArgs.length; ++i) {
arglist.push("a"+i) // Actual data array
arglist.push("t"+i) // Strides
arglist.push("p"+i) // Offset in the array at which the data starts (also used for iterating over the data)
for(var j=0; j<dimension; ++j) { // Unpack the strides into vars for looping
vars.push(["t",i,"p",j,"=t",i,"[",loopBegin[i]+j,"]"].join(""))
}
for(var j=0; j<Math.abs(proc.arrayBlockIndices[i]); ++j) { // Unpack the strides into vars for block iteration
vars.push(["t",i,"b",j,"=t",i,"[",blockBegin[i]+j,"]"].join(""))
}
}
for(var i=0; i<proc.scalarArgs.length; ++i) {
arglist.push("Y" + i)
}
if(proc.shapeArgs.length > 0) {
vars.push("shape=SS.slice(0)") // Makes the shape over which we iterate available to the user defined functions (so you can use width/height for example)
}
if(proc.indexArgs.length > 0) {
// Prepare an array to keep track of the (logical) indices, initialized to dimension zeroes.
var zeros = new Array(dimension)
for(var i=0; i<dimension; ++i) {
zeros[i] = "0"
}
vars.push(["index=[", zeros.join(","), "]"].join(""))
}
for(var i=0; i<proc.offsetArgs.length; ++i) { // Offset arguments used for stencil operations
var off_arg = proc.offsetArgs[i]
var init_string = []
for(var j=0; j<off_arg.offset.length; ++j) {
if(off_arg.offset[j] === 0) {
continue
} else if(off_arg.offset[j] === 1) {
init_string.push(["t", off_arg.array, "p", j].join(""))
} else {
init_string.push([off_arg.offset[j], "*t", off_arg.array, "p", j].join(""))
}
}
if(init_string.length === 0) {
vars.push("q" + i + "=0")
} else {
vars.push(["q", i, "=", init_string.join("+")].join(""))
}
}
//Prepare this variables
var thisVars = uniq([].concat(proc.pre.thisVars)
.concat(proc.body.thisVars)
.concat(proc.post.thisVars))
vars = vars.concat(thisVars)
code.push("var " + vars.join(","))
for(var i=0; i<proc.arrayArgs.length; ++i) {
code.push("p"+i+"|=0")
}
//Inline prelude
if(proc.pre.body.length > 3) {
code.push(processBlock(proc.pre, proc, dtypes))
}
//Process body
var body = processBlock(proc.body, proc, dtypes)
var matched = countMatches(loopOrders)
if(matched < dimension) {
code.push(outerFill(matched, loopOrders[0], proc, body)) // TODO: Rather than passing loopOrders[0], it might be interesting to look at passing an order that represents the majority of the arguments for example.
} else {
code.push(innerFill(loopOrders[0], proc, body))
}
//Inline epilog
if(proc.post.body.length > 3) {
code.push(processBlock(proc.post, proc, dtypes))
}
if(proc.debug) {
console.log("-----Generated cwise routine for ", typesig, ":\n" + code.join("\n") + "\n----------")
}
var loopName = [(proc.funcName||"unnamed"), "_cwise_loop_", orders[0].join("s"),"m",matched,typeSummary(dtypes)].join("")
var f = new Function(["function ",loopName,"(", arglist.join(","),"){", code.join("\n"),"} return ", loopName].join(""))
return f()
}
module.exports = generateCWiseOp
},{"uniq":10}],9:[function(require,module,exports){
"use strict"
// The function below is called when constructing a cwise function object, and does the following:
// A function object is constructed which accepts as argument a compilation function and returns another function.
// It is this other function that is eventually returned by createThunk, and this function is the one that actually
// checks whether a certain pattern of arguments has already been used before and compiles new loops as needed.
// The compilation passed to the first function object is used for compiling new functions.
// Once this function object is created, it is called with compile as argument, where the first argument of compile
// is bound to "proc" (essentially containing a preprocessed version of the user arguments to cwise).
// So createThunk roughly works like this:
// function createThunk(proc) {
// var thunk = function(compileBound) {
// var CACHED = {}
// return function(arrays and scalars) {
// if (dtype and order of arrays in CACHED) {
// var func = CACHED[dtype and order of arrays]
// } else {
// var func = CACHED[dtype and order of arrays] = compileBound(dtype and order of arrays)
// }
// return func(arrays and scalars)
// }
// }
// return thunk(compile.bind1(proc))
// }
var compile = require("./compile.js")
function createThunk(proc) {
var code = ["'use strict'", "var CACHED={}"]
var vars = []
var thunkName = proc.funcName + "_cwise_thunk"
//Build thunk
code.push(["return function ", thunkName, "(", proc.shimArgs.join(","), "){"].join(""))
var typesig = []
var string_typesig = []
var proc_args = [["array",proc.arrayArgs[0],".shape.slice(", // Slice shape so that we only retain the shape over which we iterate (which gets passed to the cwise operator as SS).
Math.max(0,proc.arrayBlockIndices[0]),proc.arrayBlockIndices[0]<0?(","+proc.arrayBlockIndices[0]+")"):")"].join("")]
var shapeLengthConditions = [], shapeConditions = []
// Process array arguments
for(var i=0; i<proc.arrayArgs.length; ++i) {
var j = proc.arrayArgs[i]
vars.push(["t", j, "=array", j, ".dtype,",
"r", j, "=array", j, ".order"].join(""))
typesig.push("t" + j)
typesig.push("r" + j)
string_typesig.push("t"+j)
string_typesig.push("r"+j+".join()")
proc_args.push("array" + j + ".data")
proc_args.push("array" + j + ".stride")
proc_args.push("array" + j + ".offset|0")
if (i>0) { // Gather conditions to check for shape equality (ignoring block indices)
shapeLengthConditions.push("array" + proc.arrayArgs[0] + ".shape.length===array" + j + ".shape.length+" + (Math.abs(proc.arrayBlockIndices[0])-Math.abs(proc.arrayBlockIndices[i])))
shapeConditions.push("array" + proc.arrayArgs[0] + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[0]) + "]===array" + j + ".shape[shapeIndex+" + Math.max(0,proc.arrayBlockIndices[i]) + "]")
}
}
// Check for shape equality
if (proc.arrayArgs.length > 1) {
code.push("if (!(" + shapeLengthConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same dimensionality!')")
code.push("for(var shapeIndex=array" + proc.arrayArgs[0] + ".shape.length-" + Math.abs(proc.arrayBlockIndices[0]) + "; shapeIndex-->0;) {")
code.push("if (!(" + shapeConditions.join(" && ") + ")) throw new Error('cwise: Arrays do not all have the same shape!')")
code.push("}")
}
// Process scalar arguments
for(var i=0; i<proc.scalarArgs.length; ++i) {
proc_args.push("scalar" + proc.scalarArgs[i])
}
// Check for cached function (and if not present, generate it)
vars.push(["type=[", string_typesig.join(","), "].join()"].join(""))
vars.push("proc=CACHED[type]")
code.push("var " + vars.join(","))
code.push(["if(!proc){",
"CACHED[type]=proc=compile([", typesig.join(","), "])}",
"return proc(", proc_args.join(","), ")}"].join(""))
if(proc.debug) {
console.log("-----Generated thunk:\n" + code.join("\n") + "\n----------")
}
//Compile thunk
var thunk = new Function("compile", code.join("\n"))
return thunk(compile.bind(undefined, proc))
}
module.exports = createThunk
},{"./compile.js":8}],10:[function(require,module,exports){
"use strict"
function unique_pred(list, compare) {
var ptr = 1
, len = list.length
, a=list[0], b=list[0]
for(var i=1; i<len; ++i) {
b = a
a = list[i]
if(compare(a, b)) {
if(i === ptr) {
ptr++
continue
}
list[ptr++] = a
}
}
list.length = ptr
return list
}
function unique_eq(list) {
var ptr = 1
, len = list.length
, a=list[0], b = list[0]
for(var i=1; i<len; ++i, b=a) {
b = a
a = list[i]
if(a !== b) {
if(i === ptr) {
ptr++
continue
}
list[ptr++] = a
}
}
list.length = ptr
return list
}
function unique(list, compare, sorted) {
if(list.length === 0) {
return list
}
if(compare) {
if(!sorted) {
list.sort(compare)
}
return unique_pred(list, compare)
}
if(!sorted) {
list.sort()
}
return unique_eq(list)
}
module.exports = unique
},{}],11:[function(require,module,exports){
var iota = require("iota-array")
var isBuffer = require("is-buffer")
var hasTypedArrays = ((typeof Float64Array) !== "undefined")
function compare1st(a, b) {
return a[0] - b[0]
}
function order() {
var stride = this.stride
var terms = new Array(stride.length)
var i
for(i=0; i<terms.length; ++i) {
terms[i] = [Math.abs(stride[i]), i]
}
terms.sort(compare1st)
var result = new Array(terms.length)
for(i=0; i<result.length; ++i) {
result[i] = terms[i][1]
}
return result
}
function compileConstructor(dtype, dimension) {
var className = ["View", dimension, "d", dtype].join("")
if(dimension < 0) {
className = "View_Nil" + dtype
}
var useGetters = (dtype === "generic")
if(dimension === -1) {
//Special case for trivial arrays
var code =
"function "+className+"(a){this.data=a;};\
var proto="+className+".prototype;\
proto.dtype='"+dtype+"';\
proto.index=function(){return -1};\
proto.size=0;\
proto.dimension=-1;\
proto.shape=proto.stride=proto.order=[];\
proto.lo=proto.hi=proto.transpose=proto.step=\
function(){return new "+className+"(this.data);};\
proto.get=proto.set=function(){};\
proto.pick=function(){return null};\
return function construct_"+className+"(a){return new "+className+"(a);}"
var procedure = new Function(code)
return procedure()
} else if(dimension === 0) {
//Special case for 0d arrays
var code =
"function "+className+"(a,d) {\
this.data = a;\
this.offset = d\
};\
var proto="+className+".prototype;\
proto.dtype='"+dtype+"';\
proto.index=function(){return this.offset};\
proto.dimension=0;\
proto.size=1;\
proto.shape=\
proto.stride=\
proto.order=[];\
proto.lo=\
proto.hi=\
proto.transpose=\
proto.step=function "+className+"_copy() {\
return new "+className+"(this.data,this.offset)\
};\
proto.pick=function "+className+"_pick(){\
return TrivialArray(this.data);\
};\
proto.valueOf=proto.get=function "+className+"_get(){\
return "+(useGetters ? "this.data.get(this.offset)" : "this.data[this.offset]")+
"};\
proto.set=function "+className+"_set(v){\
return "+(useGetters ? "this.data.set(this.offset,v)" : "this.data[this.offset]=v")+"\
};\
return function construct_"+className+"(a,b,c,d){return new "+className+"(a,d)}"
var procedure = new Function("TrivialArray", code)
return procedure(CACHED_CONSTRUCTORS[dtype][0])
}
var code = ["'use strict'"]
//Create constructor for view
var indices = iota(dimension)
var args = indices.map(function(i) { return "i"+i })
var index_str = "this.offset+" + indices.map(function(i) {
return "this.stride[" + i + "]*i" + i
}).join("+")
var shapeArg = indices.map(function(i) {
return "b"+i
}).join(",")
var strideArg = indices.map(function(i) {
return "c"+i
}).join(",")
code.push(
"function "+className+"(a," + shapeArg + "," + strideArg + ",d){this.data=a",
"this.shape=[" + shapeArg + "]",
"this.stride=[" + strideArg + "]",
"this.offset=d|0}",
"var proto="+className+".prototype",
"proto.dtype='"+dtype+"'",
"proto.dimension="+dimension)
//view.size:
code.push("Object.defineProperty(proto,'size',{get:function "+className+"_size(){\
return "+indices.map(function(i) { return "this.shape["+i+"]" }).join("*"),
"}})")
//view.order:
if(dimension === 1) {
code.push("proto.order=[0]")
} else {
code.push("Object.defineProperty(proto,'order',{get:")
if(dimension < 4) {
code.push("function "+className+"_order(){")
if(dimension === 2) {
code.push("return (Math.abs(this.stride[0])>Math.abs(this.stride[1]))?[1,0]:[0,1]}})")
} else if(dimension === 3) {
code.push(
"var s0=Math.abs(this.stride[0]),s1=Math.abs(this.stride[1]),s2=Math.abs(this.stride[2]);\
if(s0>s1){\
if(s1>s2){\
return [2,1,0];\
}else if(s0>s2){\
return [1,2,0];\
}else{\
return [1,0,2];\
}\
}else if(s0>s2){\
return [2,0,1];\
}else if(s2>s1){\
return [0,1,2];\
}else{\
return [0,2,1];\
}}})")
}
} else {
code.push("ORDER})")
}
}
//view.set(i0, ..., v):
code.push(
"proto.set=function "+className+"_set("+args.join(",")+",v){")
if(useGetters) {
code.push("return this.data.set("+index_str+",v)}")
} else {
code.push("return this.data["+index_str+"]=v}")
}
//view.get(i0, ...):
code.push("proto.get=function "+className+"_get("+args.join(",")+"){")
if(useGetters) {
code.push("return this.data.get("+index_str+")}")
} else {
code.push("return this.data["+index_str+"]}")
}
//view.index:
code.push(
"proto.index=function "+className+"_index(", args.join(), "){return "+index_str+"}")
//view.hi():
code.push("proto.hi=function "+className+"_hi("+args.join(",")+"){return new "+className+"(this.data,"+
indices.map(function(i) {
return ["(typeof i",i,"!=='number'||i",i,"<0)?this.shape[", i, "]:i", i,"|0"].join("")
}).join(",")+","+
indices.map(function(i) {
return "this.stride["+i + "]"
}).join(",")+",this.offset)}")
//view.lo():
var a_vars = indices.map(function(i) { return "a"+i+"=this.shape["+i+"]" })
var c_vars = indices.map(function(i) { return "c"+i+"=this.stride["+i+"]" })
code.push("proto.lo=function "+className+"_lo("+args.join(",")+"){var b=this.offset,d=0,"+a_vars.join(",")+","+c_vars.join(","))
for(var i=0; i<dimension; ++i) {
code.push(
"if(typeof i"+i+"==='number'&&i"+i+">=0){\
d=i"+i+"|0;\
b+=c"+i+"*d;\
a"+i+"-=d}")
}
code.push("return new "+className+"(this.data,"+
indices.map(function(i) {
return "a"+i
}).join(",")+","+
indices.map(function(i) {
return "c"+i
}).join(",")+",b)}")
//view.step():
code.push("proto.step=function "+className+"_step("+args.join(",")+"){var "+
indices.map(function(i) {
return "a"+i+"=this.shape["+i+"]"
}).join(",")+","+
indices.map(function(i) {
return "b"+i+"=this.stride["+i+"]"
}).join(",")+",c=this.offset,d=0,ceil=Math.ceil")
for(var i=0; i<dimension; ++i) {
code.push(
"if(typeof i"+i+"==='number'){\
d=i"+i+"|0;\
if(d<0){\
c+=b"+i+"*(a"+i+"-1);\
a"+i+"=ceil(-a"+i+"/d)\
}else{\
a"+i+"=ceil(a"+i+"/d)\
}\
b"+i+"*=d\
}")
}
code.push("return new "+className+"(this.data,"+
indices.map(function(i) {
return "a" + i
}).join(",")+","+
indices.map(function(i) {
return "b" + i
}).join(",")+",c)}")
//view.transpose():
var tShape = new Array(dimension)
var tStride = new Array(dimension)
for(var i=0; i<dimension; ++i) {
tShape[i] = "a[i"+i+"]"
tStride[i] = "b[i"+i+"]"
}
code.push("proto.transpose=function "+className+"_transpose("+args+"){"+
args.map(function(n,idx) { return n + "=(" + n + "===undefined?" + idx + ":" + n + "|0)"}).join(";"),
"var a=this.shape,b=this.stride;return new "+className+"(this.data,"+tShape.join(",")+","+tStride.join(",")+",this.offset)}")
//view.pick():
code.push("proto.pick=function "+className+"_pick("+args+"){var a=[],b=[],c=this.offset")
for(var i=0; i<dimension; ++i) {
code.push("if(typeof i"+i+"==='number'&&i"+i+">=0){c=(c+this.stride["+i+"]*i"+i+")|0}else{a.push(this.shape["+i+"]);b.push(this.stride["+i+"])}")
}
code.push("var ctor=CTOR_LIST[a.length+1];return ctor(this.data,a,b,c)}")
//Add return statement
code.push("return function construct_"+className+"(data,shape,stride,offset){return new "+className+"(data,"+
indices.map(function(i) {
return "shape["+i+"]"
}).join(",")+","+
indices.map(function(i) {
return "stride["+i+"]"
}).join(",")+",offset)}")
//Compile procedure
var procedure = new Function("CTOR_LIST", "ORDER", code.join("\n"))
return procedure(CACHED_CONSTRUCTORS[dtype], order)
}
function arrayDType(data) {
if(isBuffer(data)) {
return "buffer"
}
if(hasTypedArrays) {
switch(Object.prototype.toString.call(data)) {
case "[object Float64Array]":
return "float64"
case "[object Float32Array]":
return "float32"
case "[object Int8Array]":
return "int8"
case "[object Int16Array]":
return "int16"
case "[object Int32Array]":
return "int32"
case "[object Uint8Array]":
return "uint8"
case "[object Uint16Array]":
return "uint16"
case "[object Uint32Array]":
return "uint32"
case "[object Uint8ClampedArray]":
return "uint8_clamped"
}
}
if(Array.isArray(data)) {
return "array"
}
return "generic"
}
var CACHED_CONSTRUCTORS = {
"float32":[],
"float64":[],
"int8":[],
"int16":[],
"int32":[],
"uint8":[],
"uint16":[],
"uint32":[],
"array":[],
"uint8_clamped":[],
"buffer":[],
"generic":[]
}
;(function() {
for(var id in CACHED_CONSTRUCTORS) {
CACHED_CONSTRUCTORS[id].push(compileConstructor(id, -1))
}
});
function wrappedNDArrayCtor(data, shape, stride, offset) {
if(data === undefined) {
var ctor = CACHED_CONSTRUCTORS.array[0]
return ctor([])
} else if(typeof data === "number") {
data = [data]
}
if(shape === undefined) {
shape = [ data.length ]
}
var d = shape.length
if(stride === undefined) {
stride = new Array(d)
for(var i=d-1, sz=1; i>=0; --i) {
stride[i] = sz
sz *= shape[i]
}
}
if(offset === undefined) {
offset = 0
for(var i=0; i<d; ++i) {
if(stride[i] < 0) {
offset -= (shape[i]-1)*stride[i]
}
}
}
var dtype = arrayDType(data)
var ctor_list = CACHED_CONSTRUCTORS[dtype]
while(ctor_list.length <= d+1) {
ctor_list.push(compileConstructor(dtype, ctor_list.length-1))
}
var ctor = ctor_list[d+1]
return ctor(data, shape, stride, offset)
}
module.exports = wrappedNDArrayCtor
},{"iota-array":12,"is-buffer":13}],12:[function(require,module,exports){
"use strict"
function iota(n) {
var result = new Array(n)
for(var i=0; i<n; ++i) {
result[i] = i
}
return result
}
module.exports = iota
},{}],13:[function(require,module,exports){
/*!
* Determine if an object is a Buffer
*
* @author Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
* @license MIT
*/
// The _isBuffer check is for Safari 5-7 support, because it's missing
// Object.prototype.constructor. Remove this eventually
module.exports = function (obj) {
return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
}
function isBuffer (obj) {
return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}
// For Node v0.10 support. Remove this eventually.
function isSlowBuffer (obj) {
return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
}
},{}],14:[function(require,module,exports){
"use strict"
var pool = require("typedarray-pool")
module.exports = createSurfaceExtractor
//Helper macros
function array(i) {
return "a" + i
}
function data(i) {
return "d" + i
}
function cube(i,bitmask) {
return "c" + i + "_" + bitmask
}
function shape(i) {
return "s" + i
}
function stride(i,j) {
return "t" + i + "_" + j
}
function offset(i) {
return "o" + i
}
function scalar(i) {
return "x" + i
}
function pointer(i) {
return "p" + i
}
function delta(i,bitmask) {
return "d" + i + "_" + bitmask
}
function index(i) {
return "i" + i
}
function step(i,j) {
return "u" + i + "_" + j
}
function pcube(bitmask) {
return "b" + bitmask
}
function qcube(bitmask) {
return "y" + bitmask
}
function pdelta(bitmask) {
return "e" + bitmask
}
function vert(i) {
return "v" + i
}
var VERTEX_IDS = "V"
var PHASES = "P"
var VERTEX_COUNT = "N"
var POOL_SIZE = "Q"
var POINTER = "X"
var TEMPORARY = "T"
function permBitmask(dimension, mask, order) {
var r = 0
for(var i=0; i<dimension; ++i) {
if(mask & (1<<i)) {
r |= (1<<order[i])
}
}
return r
}
//Generates the surface procedure
function compileSurfaceProcedure(vertexFunc, faceFunc, phaseFunc, scalarArgs, order, typesig) {
var arrayArgs = typesig.length
var dimension = order.length
if(dimension < 2) {
throw new Error("ndarray-extract-contour: Dimension must be at least 2")
}
var funcName = "extractContour" + order.join("_")
var code = []
var vars = []
var args = []
//Assemble arguments
for(var i=0; i<arrayArgs; ++i) {
args.push(array(i))
}
for(var i=0; i<scalarArgs; ++i) {
args.push(scalar(i))
}
//Shape
for(var i=0; i<dimension; ++i) {
vars.push(shape(i) + "=" + array(0) + ".shape[" + i + "]|0")
}
//Data, stride, offset pointers
for(var i=0; i<arrayArgs; ++i) {
vars.push(data(i) + "=" + array(i) + ".data",
offset(i) + "=" + array(i) + ".offset|0")
for(var j=0; j<dimension; ++j) {
vars.push(stride(i,j) + "=" + array(i) + ".stride[" + j + "]|0")
}
}
//Pointer, delta and cube variables
for(var i=0; i<arrayArgs; ++i) {
vars.push(pointer(i) + "=" + offset(i))
vars.push(cube(i,0))
for(var j=1; j<(1<<dimension); ++j) {
var ptrStr = []
for(var k=0; k<dimension; ++k) {
if(j & (1<<k)) {
ptrStr.push("-" + stride(i,k))
}
}
vars.push(delta(i,j) + "=(" + ptrStr.join("") + ")|0")
vars.push(cube(i,j) + "=0")
}
}
//Create step variables
for(var i=0; i<arrayArgs; ++i) {
for(var j=0; j<dimension; ++j) {
var stepVal = [ stride(i,order[j]) ]
if(j > 0) {
stepVal.push(stride(i, order[j-1]) + "*" + shape(order[j-1]) )
}
vars.push(step(i,order[j]) + "=(" + stepVal.join("-") + ")|0")
}
}
//Create index variables
for(var i=0; i<dimension; ++i) {
vars.push(index(i) + "=0")
}
//Vertex count
vars.push(VERTEX_COUNT + "=0")
//Compute pool size, initialize pool step
var sizeVariable = ["2"]
for(var i=dimension-2; i>=0; --i) {
sizeVariable.push(shape(order[i]))
}
//Previous phases and vertex_ids
vars.push(POOL_SIZE + "=(" + sizeVariable.join("*") + ")|0",
PHASES + "=mallocUint32(" + POOL_SIZE + ")",
VERTEX_IDS + "=mallocUint32(" + POOL_SIZE + ")",
POINTER + "=0")
//Create cube variables for phases
vars.push(pcube(0) + "=0")
for(var j=1; j<(1<<dimension); ++j) {
var cubeDelta = []
var cubeStep = [ ]
for(var k=0; k<dimension; ++k) {
if(j & (1<<k)) {
if(cubeStep.length === 0) {
cubeDelta.push("1")
} else {
cubeDelta.unshift(cubeStep.join("*"))
}
}
cubeStep.push(shape(order[k]))
}
var signFlag = ""
if(cubeDelta[0].indexOf(shape(order[dimension-2])) < 0) {
signFlag = "-"
}
var jperm = permBitmask(dimension, j, order)
vars.push(pdelta(jperm) + "=(-" + cubeDelta.join("-") + ")|0",
qcube(jperm) + "=(" + signFlag + cubeDelta.join("-") + ")|0",
pcube(jperm) + "=0")
}
vars.push(vert(0) + "=0", TEMPORARY + "=0")
function forLoopBegin(i, start) {
code.push("for(", index(order[i]), "=", start, ";",
index(order[i]), "<", shape(order[i]), ";",
"++", index(order[i]), "){")
}
function forLoopEnd(i) {
for(var j=0; j<arrayArgs; ++j) {
code.push(pointer(j), "+=", step(j,order[i]), ";")
}
code.push("}")
}
function fillEmptySlice(k) {
for(var i=k-1; i>=0; --i) {
forLoopBegin(i, 0)
}
var phaseFuncArgs = []
for(var i=0; i<arrayArgs; ++i) {
if(typesig[i]) {
phaseFuncArgs.push(data(i) + ".get(" + pointer(i) + ")")
} else {
phaseFuncArgs.push(data(i) + "[" + pointer(i) + "]")
}
}
for(var i=0; i<scalarArgs; ++i) {
phaseFuncArgs.push(scalar(i))
}
code.push(PHASES, "[", POINTER, "++]=phase(", phaseFuncArgs.join(), ");")
for(var i=0; i<k; ++i) {
forLoopEnd(i)
}
for(var j=0; j<arrayArgs; ++j) {
code.push(pointer(j), "+=", step(j,order[k]), ";")
}
}
function processGridCell(mask) {
//Read in local data
for(var i=0; i<arrayArgs; ++i) {
if(typesig[i]) {
code.push(cube(i,0), "=", data(i), ".get(", pointer(i), ");")
} else {
code.push(cube(i,0), "=", data(i), "[", pointer(i), "];")
}
}
//Read in phase
var phaseFuncArgs = []
for(var i=0; i<arrayArgs; ++i) {
phaseFuncArgs.push(cube(i,0))
}
for(var i=0; i<scalarArgs; ++i) {
phaseFuncArgs.push(scalar(i))
}
code.push(pcube(0), "=", PHASES, "[", POINTER, "]=phase(", phaseFuncArgs.join(), ");")
//Read in other cube data
for(var j=1; j<(1<<dimension); ++j) {
code.push(pcube(j), "=", PHASES, "[", POINTER, "+", pdelta(j), "];")
}
//Check for boundary crossing
var vertexPredicate = []
for(var j=1; j<(1<<dimension); ++j) {
vertexPredicate.push("(" + pcube(0) + "!==" + pcube(j) + ")")
}
code.push("if(", vertexPredicate.join("||"), "){")
//Read in boundary data
var vertexArgs = []
for(var i=0; i<dimension; ++i) {
vertexArgs.push(index(i))
}
for(var i=0; i<arrayArgs; ++i) {
vertexArgs.push(cube(i,0))
for(var j=1; j<(1<<dimension); ++j) {
if(typesig[i]) {
code.push(cube(i,j), "=", data(i), ".get(", pointer(i), "+", delta(i,j), ");")
} else {
code.push(cube(i,j), "=", data(i), "[", pointer(i), "+", delta(i,j), "];")
}
vertexArgs.push(cube(i,j))
}
}
for(var i=0; i<(1<<dimension); ++i) {
vertexArgs.push(pcube(i))
}
for(var i=0; i<scalarArgs; ++i) {
vertexArgs.push(scalar(i))
}
//Generate vertex
code.push("vertex(", vertexArgs.join(), ");",
vert(0), "=", VERTEX_IDS, "[", POINTER, "]=", VERTEX_COUNT, "++;")
//Check for face crossings
var base = (1<<dimension)-1
var corner = pcube(base)
for(var j=0; j<dimension; ++j) {
if((mask & ~(1<<j))===0) {
//Check face
var subset = base^(1<<j)
var edge = pcube(subset)
var faceArgs = [ ]
for(var k=subset; k>0; k=(k-1)&subset) {
faceArgs.push(VERTEX_IDS + "[" + POINTER + "+" + pdelta(k) + "]")
}
faceArgs.push(vert(0))
for(var k=0; k<arrayArgs; ++k) {
if(j&1) {
faceArgs.push(cube(k,base), cube(k,subset))
} else {
faceArgs.push(cube(k,subset), cube(k,base))
}
}
if(j&1) {
faceArgs.push(corner, edge)
} else {
faceArgs.push(edge, corner)
}
for(var k=0; k<scalarArgs; ++k) {
faceArgs.push(scalar(k))
}
code.push("if(", corner, "!==", edge, "){",
"face(", faceArgs.join(), ")}")
}
}
//Increment pointer, close off if statement
code.push("}",
POINTER, "+=1;")
}
function flip() {
for(var j=1; j<(1<<dimension); ++j) {
code.push(TEMPORARY, "=", pdelta(j), ";",
pdelta(j), "=", qcube(j), ";",
qcube(j), "=", TEMPORARY, ";")
}
}
function createLoop(i, mask) {
if(i < 0) {
processGridCell(mask)
return
}
fillEmptySlice(i)
code.push("if(", shape(order[i]), ">0){",
index(order[i]), "=1;")
createLoop(i-1, mask|(1<<order[i]))
for(var j=0; j<arrayArgs; ++j) {
code.push(pointer(j), "+=", step(j,order[i]), ";")
}
if(i === dimension-1) {
code.push(POINTER, "=0;")
flip()
}
forLoopBegin(i, 2)
createLoop(i-1, mask)
if(i === dimension-1) {
code.push("if(", index(order[dimension-1]), "&1){",
POINTER, "=0;}")
flip()
}
forLoopEnd(i)
code.push("}")
}
createLoop(dimension-1, 0)
//Release scratch memory
code.push("freeUint32(", VERTEX_IDS, ");freeUint32(", PHASES, ");")
//Compile and link procedure
var procedureCode = [
"'use strict';",
"function ", funcName, "(", args.join(), "){",
"var ", vars.join(), ";",
code.join(""),
"}",
"return ", funcName ].join("")
var proc = new Function(
"vertex",
"face",
"phase",
"mallocUint32",
"freeUint32",
procedureCode)
return proc(
vertexFunc,
faceFunc,
phaseFunc,
pool.mallocUint32,
pool.freeUint32)
}
function createSurfaceExtractor(args) {
function error(msg) {
throw new Error("ndarray-extract-contour: " + msg)
}
if(typeof args !== "object") {
error("Must specify arguments")
}
var order = args.order
if(!Array.isArray(order)) {
error("Must specify order")
}
var arrays = args.arrayArguments||1
if(arrays < 1) {
error("Must have at least one array argument")
}
var scalars = args.scalarArguments||0
if(scalars < 0) {
error("Scalar arg count must be > 0")
}
if(typeof args.vertex !== "function") {
error("Must specify vertex creation function")
}
if(typeof args.cell !== "function") {
error("Must specify cell creation function")
}
if(typeof args.phase !== "function") {
error("Must specify phase function")
}
var getters = args.getters || []
var typesig = new Array(arrays)
for(var i=0; i<arrays; ++i) {
if(getters.indexOf(i) >= 0) {
typesig[i] = true
} else {
typesig[i] = false
}
}
return compileSurfaceProcedure(
args.vertex,
args.cell,
args.phase,
scalars,
order,
typesig)
}
},{"typedarray-pool":17}],15:[function(require,module,exports){
/**
* Bit twiddling hacks for JavaScript.
*
* Author: Mikola Lysenko
*
* Ported from Stanford bit twiddling hack library:
* http://graphics.stanford.edu/~seander/bithacks.html
*/
"use strict"; "use restrict";
//Number of bits in an integer
var INT_BITS = 32;
//Constants
exports.INT_BITS = INT_BITS;
exports.INT_MAX = 0x7fffffff;
exports.INT_MIN = -1<<(INT_BITS-1);
//Returns -1, 0, +1 depending on sign of x
exports.sign = function(v) {
return (v > 0) - (v < 0);
}
//Computes absolute value of integer
exports.abs = function(v) {
var mask = v >> (INT_BITS-1);
return (v ^ mask) - mask;
}
//Computes minimum of integers x and y
exports.min = function(x, y) {
return y ^ ((x ^ y) & -(x < y));
}
//Computes maximum of integers x and y
exports.max = function(x, y) {
return x ^ ((x ^ y) & -(x < y));
}
//Checks if a number is a power of two
exports.isPow2 = function(v) {
return !(v & (v-1)) && (!!v);
}
//Computes log base 2 of v
exports.log2 = function(v) {
var r, shift;
r = (v > 0xFFFF) << 4; v >>>= r;
shift = (v > 0xFF ) << 3; v >>>= shift; r |= shift;
shift = (v > 0xF ) << 2; v >>>= shift; r |= shift;
shift = (v > 0x3 ) << 1; v >>>= shift; r |= shift;
return r | (v >> 1);
}
//Computes log base 10 of v
exports.log10 = function(v) {
return (v >= 1000000000) ? 9 : (v >= 100000000) ? 8 : (v >= 10000000) ? 7 :
(v >= 1000000) ? 6 : (v >= 100000) ? 5 : (v >= 10000) ? 4 :
(v >= 1000) ? 3 : (v >= 100) ? 2 : (v >= 10) ? 1 : 0;
}
//Counts number of bits
exports.popCount = function(v) {
v = v - ((v >>> 1) & 0x55555555);
v = (v & 0x33333333) + ((v >>> 2) & 0x33333333);
return ((v + (v >>> 4) & 0xF0F0F0F) * 0x1010101) >>> 24;
}
//Counts number of trailing zeros
function countTrailingZeros(v) {
var c = 32;
v &= -v;
if (v) c--;
if (v & 0x0000FFFF) c -= 16;
if (v & 0x00FF00FF) c -= 8;
if (v & 0x0F0F0F0F) c -= 4;
if (v & 0x33333333) c -= 2;
if (v & 0x55555555) c -= 1;
return c;
}
exports.countTrailingZeros = countTrailingZeros;
//Rounds to next power of 2
exports.nextPow2 = function(v) {
v += v === 0;
--v;
v |= v >>> 1;
v |= v >>> 2;
v |= v >>> 4;
v |= v >>> 8;
v |= v >>> 16;
return v + 1;
}
//Rounds down to previous power of 2
exports.prevPow2 = function(v) {
v |= v >>> 1;
v |= v >>> 2;
v |= v >>> 4;
v |= v >>> 8;
v |= v >>> 16;
return v - (v>>>1);
}
//Computes parity of word
exports.parity = function(v) {
v ^= v >>> 16;
v ^= v >>> 8;
v ^= v >>> 4;
v &= 0xf;
return (0x6996 >>> v) & 1;
}
var REVERSE_TABLE = new Array(256);
(function(tab) {
for(var i=0; i<256; ++i) {
var v = i, r = i, s = 7;
for (v >>>= 1; v; v >>>= 1) {
r <<= 1;
r |= v & 1;
--s;
}
tab[i] = (r << s) & 0xff;
}
})(REVERSE_TABLE);
//Reverse bits in a 32 bit word
exports.reverse = function(v) {
return (REVERSE_TABLE[ v & 0xff] << 24) |
(REVERSE_TABLE[(v >>> 8) & 0xff] << 16) |
(REVERSE_TABLE[(v >>> 16) & 0xff] << 8) |
REVERSE_TABLE[(v >>> 24) & 0xff];
}
//Interleave bits of 2 coordinates with 16 bits. Useful for fast quadtree codes
exports.interleave2 = function(x, y) {
x &= 0xFFFF;
x = (x | (x << 8)) & 0x00FF00FF;
x = (x | (x << 4)) & 0x0F0F0F0F;
x = (x | (x << 2)) & 0x33333333;
x = (x | (x << 1)) & 0x55555555;
y &= 0xFFFF;
y = (y | (y << 8)) & 0x00FF00FF;
y = (y | (y << 4)) & 0x0F0F0F0F;
y = (y | (y << 2)) & 0x33333333;
y = (y | (y << 1)) & 0x55555555;
return x | (y << 1);
}
//Extracts the nth interleaved component
exports.deinterleave2 = function(v, n) {
v = (v >>> n) & 0x55555555;
v = (v | (v >>> 1)) & 0x33333333;
v = (v | (v >>> 2)) & 0x0F0F0F0F;
v = (v | (v >>> 4)) & 0x00FF00FF;
v = (v | (v >>> 16)) & 0x000FFFF;
return (v << 16) >> 16;
}
//Interleave bits of 3 coordinates, each with 10 bits. Useful for fast octree codes
exports.interleave3 = function(x, y, z) {
x &= 0x3FF;
x = (x | (x<<16)) & 4278190335;
x = (x | (x<<8)) & 251719695;
x = (x | (x<<4)) & 3272356035;
x = (x | (x<<2)) & 1227133513;
y &= 0x3FF;
y = (y | (y<<16)) & 4278190335;
y = (y | (y<<8)) & 251719695;
y = (y | (y<<4)) & 3272356035;
y = (y | (y<<2)) & 1227133513;
x |= (y << 1);
z &= 0x3FF;
z = (z | (z<<16)) & 4278190335;
z = (z | (z<<8)) & 251719695;
z = (z | (z<<4)) & 3272356035;
z = (z | (z<<2)) & 1227133513;
return x | (z << 2);
}
//Extracts nth interleaved component of a 3-tuple
exports.deinterleave3 = function(v, n) {
v = (v >>> n) & 1227133513;
v = (v | (v>>>2)) & 3272356035;
v = (v | (v>>>4)) & 251719695;
v = (v | (v>>>8)) & 4278190335;
v = (v | (v>>>16)) & 0x3FF;
return (v<<22)>>22;
}
//Computes next combination in colexicographic order (this is mistakenly called nextPermutation on the bit twiddling hacks page)
exports.nextCombination = function(v) {
var t = v | (v - 1);
return (t + 1) | (((~t & -~t) - 1) >>> (countTrailingZeros(v) + 1));
}
},{}],16:[function(require,module,exports){
"use strict"
function dupe_array(count, value, i) {
var c = count[i]|0
if(c <= 0) {
return []
}
var result = new Array(c), j
if(i === count.length-1) {
for(j=0; j<c; ++j) {
result[j] = value
}
} else {
for(j=0; j<c; ++j) {
result[j] = dupe_array(count, value, i+1)
}
}
return result
}
function dupe_number(count, value) {
var result, i
result = new Array(count)
for(i=0; i<count; ++i) {
result[i] = value
}
return result
}
function dupe(count, value) {
if(typeof value === "undefined") {
value = 0
}
switch(typeof count) {
case "number":
if(count > 0) {
return dupe_number(count|0, value)
}
break
case "object":
if(typeof (count.length) === "number") {
return dupe_array(count, value, 0)
}
break
}
return []
}
module.exports = dupe
},{}],17:[function(require,module,exports){
(function (global,Buffer){
'use strict'
var bits = require('bit-twiddle')
var dup = require('dup')
//Legacy pool support
if(!global.__TYPEDARRAY_POOL) {
global.__TYPEDARRAY_POOL = {
UINT8 : dup([32, 0])
, UINT16 : dup([32, 0])
, UINT32 : dup([32, 0])
, INT8 : dup([32, 0])
, INT16 : dup([32, 0])
, INT32 : dup([32, 0])
, FLOAT : dup([32, 0])
, DOUBLE : dup([32, 0])
, DATA : dup([32, 0])
, UINT8C : dup([32, 0])
, BUFFER : dup([32, 0])
}
}
var hasUint8C = (typeof Uint8ClampedArray) !== 'undefined'
var POOL = global.__TYPEDARRAY_POOL
//Upgrade pool
if(!POOL.UINT8C) {
POOL.UINT8C = dup([32, 0])
}
if(!POOL.BUFFER) {
POOL.BUFFER = dup([32, 0])
}
//New technique: Only allocate from ArrayBufferView and Buffer
var DATA = POOL.DATA
, BUFFER = POOL.BUFFER
exports.free = function free(array) {
if(Buffer.isBuffer(array)) {
BUFFER[bits.log2(array.length)].push(array)
} else {
if(Object.prototype.toString.call(array) !== '[object ArrayBuffer]') {
array = array.buffer
}
if(!array) {
return
}
var n = array.length || array.byteLength
var log_n = bits.log2(n)|0
DATA[log_n].push(array)
}
}
function freeArrayBuffer(buffer) {
if(!buffer) {
return
}
var n = buffer.length || buffer.byteLength
var log_n = bits.log2(n)
DATA[log_n].push(buffer)
}
function freeTypedArray(array) {
freeArrayBuffer(array.buffer)
}
exports.freeUint8 =
exports.freeUint16 =
exports.freeUint32 =
exports.freeInt8 =
exports.freeInt16 =
exports.freeInt32 =
exports.freeFloat32 =
exports.freeFloat =
exports.freeFloat64 =
exports.freeDouble =
exports.freeUint8Clamped =
exports.freeDataView = freeTypedArray
exports.freeArrayBuffer = freeArrayBuffer
exports.freeBuffer = function freeBuffer(array) {
BUFFER[bits.log2(array.length)].push(array)
}
exports.malloc = function malloc(n, dtype) {
if(dtype === undefined || dtype === 'arraybuffer') {
return mallocArrayBuffer(n)
} else {
switch(dtype) {
case 'uint8':
return mallocUint8(n)
case 'uint16':
return mallocUint16(n)
case 'uint32':
return mallocUint32(n)
case 'int8':
return mallocInt8(n)
case 'int16':
return mallocInt16(n)
case 'int32':
return mallocInt32(n)
case 'float':
case 'float32':
return mallocFloat(n)
case 'double':
case 'float64':
return mallocDouble(n)
case 'uint8_clamped':
return mallocUint8Clamped(n)
case 'buffer':
return mallocBuffer(n)
case 'data':
case 'dataview':
return mallocDataView(n)
default:
return null
}
}
return null
}
function mallocArrayBuffer(n) {
var n = bits.nextPow2(n)
var log_n = bits.log2(n)
var d = DATA[log_n]
if(d.length > 0) {
return d.pop()
}
return new ArrayBuffer(n)
}
exports.mallocArrayBuffer = mallocArrayBuffer
function mallocUint8(n) {
return new Uint8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocUint8 = mallocUint8
function mallocUint16(n) {
return new Uint16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocUint16 = mallocUint16
function mallocUint32(n) {
return new Uint32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocUint32 = mallocUint32
function mallocInt8(n) {
return new Int8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocInt8 = mallocInt8
function mallocInt16(n) {
return new Int16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocInt16 = mallocInt16
function mallocInt32(n) {
return new Int32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocInt32 = mallocInt32
function mallocFloat(n) {
return new Float32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocFloat32 = exports.mallocFloat = mallocFloat
function mallocDouble(n) {
return new Float64Array(mallocArrayBuffer(8*n), 0, n)
}
exports.mallocFloat64 = exports.mallocDouble = mallocDouble
function mallocUint8Clamped(n) {
if(hasUint8C) {
return new Uint8ClampedArray(mallocArrayBuffer(n), 0, n)
} else {
return mallocUint8(n)
}
}
exports.mallocUint8Clamped = mallocUint8Clamped
function mallocDataView(n) {
return new DataView(mallocArrayBuffer(n), 0, n)
}
exports.mallocDataView = mallocDataView
function mallocBuffer(n) {
n = bits.nextPow2(n)
var log_n = bits.log2(n)
var cache = BUFFER[log_n]
if(cache.length > 0) {
return cache.pop()
}
return new Buffer(n)
}
exports.mallocBuffer = mallocBuffer
exports.clearCache = function clearCache() {
for(var i=0; i<32; ++i) {
POOL.UINT8[i].length = 0
POOL.UINT16[i].length = 0
POOL.UINT32[i].length = 0
POOL.INT8[i].length = 0
POOL.INT16[i].length = 0
POOL.INT32[i].length = 0
POOL.FLOAT[i].length = 0
POOL.DOUBLE[i].length = 0
POOL.UINT8C[i].length = 0
DATA[i].length = 0
BUFFER[i].length = 0
}
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
//# sourceMappingURL=data:application/json;charset:utf-8;base64,{"version":3,"sources":["node_modules/surface-nets/node_modules/ndarray-extract-contour/node_modules/typedarray-pool/pool.js"],"names":[],"mappings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file":"generated.js","sourceRoot":"","sourcesContent":["'use strict'\n\nvar bits = require('bit-twiddle')\nvar dup = require('dup')\n\n//Legacy pool support\nif(!global.__TYPEDARRAY_POOL) {\n  global.__TYPEDARRAY_POOL = {\n      UINT8   : dup([32, 0])\n    , UINT16  : dup([32, 0])\n    , UINT32  : dup([32, 0])\n    , INT8    : dup([32, 0])\n    , INT16   : dup([32, 0])\n    , INT32   : dup([32, 0])\n    , FLOAT   : dup([32, 0])\n    , DOUBLE  : dup([32, 0])\n    , DATA    : dup([32, 0])\n    , UINT8C  : dup([32, 0])\n    , BUFFER  : dup([32, 0])\n  }\n}\n\nvar hasUint8C = (typeof Uint8ClampedArray) !== 'undefined'\nvar POOL = global.__TYPEDARRAY_POOL\n\n//Upgrade pool\nif(!POOL.UINT8C) {\n  POOL.UINT8C = dup([32, 0])\n}\nif(!POOL.BUFFER) {\n  POOL.BUFFER = dup([32, 0])\n}\n\n//New technique: Only allocate from ArrayBufferView and Buffer\nvar DATA    = POOL.DATA\n  , BUFFER  = POOL.BUFFER\n\nexports.free = function free(array) {\n  if(Buffer.isBuffer(array)) {\n    BUFFER[bits.log2(array.length)].push(array)\n  } else {\n    if(Object.prototype.toString.call(array) !== '[object ArrayBuffer]') {\n      array = array.buffer\n    }\n    if(!array) {\n      return\n    }\n    var n = array.length || array.byteLength\n    var log_n = bits.log2(n)|0\n    DATA[log_n].push(array)\n  }\n}\n\nfunction freeArrayBuffer(buffer) {\n  if(!buffer) {\n    return\n  }\n  var n = buffer.length || buffer.byteLength\n  var log_n = bits.log2(n)\n  DATA[log_n].push(buffer)\n}\n\nfunction freeTypedArray(array) {\n  freeArrayBuffer(array.buffer)\n}\n\nexports.freeUint8 =\nexports.freeUint16 =\nexports.freeUint32 =\nexports.freeInt8 =\nexports.freeInt16 =\nexports.freeInt32 =\nexports.freeFloat32 = \nexports.freeFloat =\nexports.freeFloat64 = \nexports.freeDouble = \nexports.freeUint8Clamped = \nexports.freeDataView = freeTypedArray\n\nexports.freeArrayBuffer = freeArrayBuffer\n\nexports.freeBuffer = function freeBuffer(array) {\n  BUFFER[bits.log2(array.length)].push(array)\n}\n\nexports.malloc = function malloc(n, dtype) {\n  if(dtype === undefined || dtype === 'arraybuffer') {\n    return mallocArrayBuffer(n)\n  } else {\n    switch(dtype) {\n      case 'uint8':\n        return mallocUint8(n)\n      case 'uint16':\n        return mallocUint16(n)\n      case 'uint32':\n        return mallocUint32(n)\n      case 'int8':\n        return mallocInt8(n)\n      case 'int16':\n        return mallocInt16(n)\n      case 'int32':\n        return mallocInt32(n)\n      case 'float':\n      case 'float32':\n        return mallocFloat(n)\n      case 'double':\n      case 'float64':\n        return mallocDouble(n)\n      case 'uint8_clamped':\n        return mallocUint8Clamped(n)\n      case 'buffer':\n        return mallocBuffer(n)\n      case 'data':\n      case 'dataview':\n        return mallocDataView(n)\n\n      default:\n        return null\n    }\n  }\n  return null\n}\n\nfunction mallocArrayBuffer(n) {\n  var n = bits.nextPow2(n)\n  var log_n = bits.log2(n)\n  var d = DATA[log_n]\n  if(d.length > 0) {\n    return d.pop()\n  }\n  return new ArrayBuffer(n)\n}\nexports.mallocArrayBuffer = mallocArrayBuffer\n\nfunction mallocUint8(n) {\n  return new Uint8Array(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocUint8 = mallocUint8\n\nfunction mallocUint16(n) {\n  return new Uint16Array(mallocArrayBuffer(2*n), 0, n)\n}\nexports.mallocUint16 = mallocUint16\n\nfunction mallocUint32(n) {\n  return new Uint32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocUint32 = mallocUint32\n\nfunction mallocInt8(n) {\n  return new Int8Array(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocInt8 = mallocInt8\n\nfunction mallocInt16(n) {\n  return new Int16Array(mallocArrayBuffer(2*n), 0, n)\n}\nexports.mallocInt16 = mallocInt16\n\nfunction mallocInt32(n) {\n  return new Int32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocInt32 = mallocInt32\n\nfunction mallocFloat(n) {\n  return new Float32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocFloat32 = exports.mallocFloat = mallocFloat\n\nfunction mallocDouble(n) {\n  return new Float64Array(mallocArrayBuffer(8*n), 0, n)\n}\nexports.mallocFloat64 = exports.mallocDouble = mallocDouble\n\nfunction mallocUint8Clamped(n) {\n  if(hasUint8C) {\n    return new Uint8ClampedArray(mallocArrayBuffer(n), 0, n)\n  } else {\n    return mallocUint8(n)\n  }\n}\nexports.mallocUint8Clamped = mallocUint8Clamped\n\nfunction mallocDataView(n) {\n  return new DataView(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocDataView = mallocDataView\n\nfunction mallocBuffer(n) {\n  n = bits.nextPow2(n)\n  var log_n = bits.log2(n)\n  var cache = BUFFER[log_n]\n  if(cache.length > 0) {\n    return cache.pop()\n  }\n  return new Buffer(n)\n}\nexports.mallocBuffer = mallocBuffer\n\nexports.clearCache = function clearCache() {\n  for(var i=0; i<32; ++i) {\n    POOL.UINT8[i].length = 0\n    POOL.UINT16[i].length = 0\n    POOL.UINT32[i].length = 0\n    POOL.INT8[i].length = 0\n    POOL.INT16[i].length = 0\n    POOL.INT32[i].length = 0\n    POOL.FLOAT[i].length = 0\n    POOL.DOUBLE[i].length = 0\n    POOL.UINT8C[i].length = 0\n    DATA[i].length = 0\n    BUFFER[i].length = 0\n  }\n}"]}
},{"bit-twiddle":15,"buffer":1,"dup":16}],18:[function(require,module,exports){
// transliterated from the python snippet here:
// http://en.wikipedia.org/wiki/Lanczos_approximation
var g = 7;
var p = [
0.99999999999980993,
676.5203681218851,
-1259.1392167224028,
771.32342877765313,
-176.61502916214059,
12.507343278686905,
-0.13857109526572012,
9.9843695780195716e-6,
1.5056327351493116e-7
];
var g_ln = 607/128;
var p_ln = [
0.99999999999999709182,
57.156235665862923517,
-59.597960355475491248,
14.136097974741747174,
-0.49191381609762019978,
0.33994649984811888699e-4,
0.46523628927048575665e-4,
-0.98374475304879564677e-4,
0.15808870322491248884e-3,
-0.21026444172410488319e-3,
0.21743961811521264320e-3,
-0.16431810653676389022e-3,
0.84418223983852743293e-4,
-0.26190838401581408670e-4,
0.36899182659531622704e-5
];
// Spouge approximation (suitable for large arguments)
function lngamma(z) {
if(z < 0) return Number('0/0');
var x = p_ln[0];
for(var i = p_ln.length - 1; i > 0; --i) x += p_ln[i] / (z + i);
var t = z + g_ln + 0.5;
return .5*Math.log(2*Math.PI)+(z+.5)*Math.log(t)-t+Math.log(x)-Math.log(z);
}
module.exports = function gamma (z) {
if (z < 0.5) {
return Math.PI / (Math.sin(Math.PI * z) * gamma(1 - z));
}
else if(z > 100) return Math.exp(lngamma(z));
else {
z -= 1;
var x = p[0];
for (var i = 1; i < g + 2; i++) {
x += p[i] / (z + i);
}
var t = z + g + 0.5;
return Math.sqrt(2 * Math.PI)
* Math.pow(t, z + 0.5)
* Math.exp(-t)
* x
;
}
};
module.exports.log = lngamma;
},{}],19:[function(require,module,exports){
arguments[4][15][0].apply(exports,arguments)
},{"dup":15}],20:[function(require,module,exports){
arguments[4][16][0].apply(exports,arguments)
},{"dup":16}],21:[function(require,module,exports){
(function (global,Buffer){
'use strict'
var bits = require('bit-twiddle')
var dup = require('dup')
//Legacy pool support
if(!global.__TYPEDARRAY_POOL) {
global.__TYPEDARRAY_POOL = {
UINT8 : dup([32, 0])
, UINT16 : dup([32, 0])
, UINT32 : dup([32, 0])
, INT8 : dup([32, 0])
, INT16 : dup([32, 0])
, INT32 : dup([32, 0])
, FLOAT : dup([32, 0])
, DOUBLE : dup([32, 0])
, DATA : dup([32, 0])
, UINT8C : dup([32, 0])
, BUFFER : dup([32, 0])
}
}
var hasUint8C = (typeof Uint8ClampedArray) !== 'undefined'
var POOL = global.__TYPEDARRAY_POOL
//Upgrade pool
if(!POOL.UINT8C) {
POOL.UINT8C = dup([32, 0])
}
if(!POOL.BUFFER) {
POOL.BUFFER = dup([32, 0])
}
//New technique: Only allocate from ArrayBufferView and Buffer
var DATA = POOL.DATA
, BUFFER = POOL.BUFFER
exports.free = function free(array) {
if(Buffer.isBuffer(array)) {
BUFFER[bits.log2(array.length)].push(array)
} else {
if(Object.prototype.toString.call(array) !== '[object ArrayBuffer]') {
array = array.buffer
}
if(!array) {
return
}
var n = array.length || array.byteLength
var log_n = bits.log2(n)|0
DATA[log_n].push(array)
}
}
function freeArrayBuffer(buffer) {
if(!buffer) {
return
}
var n = buffer.length || buffer.byteLength
var log_n = bits.log2(n)
DATA[log_n].push(buffer)
}
function freeTypedArray(array) {
freeArrayBuffer(array.buffer)
}
exports.freeUint8 =
exports.freeUint16 =
exports.freeUint32 =
exports.freeInt8 =
exports.freeInt16 =
exports.freeInt32 =
exports.freeFloat32 =
exports.freeFloat =
exports.freeFloat64 =
exports.freeDouble =
exports.freeUint8Clamped =
exports.freeDataView = freeTypedArray
exports.freeArrayBuffer = freeArrayBuffer
exports.freeBuffer = function freeBuffer(array) {
BUFFER[bits.log2(array.length)].push(array)
}
exports.malloc = function malloc(n, dtype) {
if(dtype === undefined || dtype === 'arraybuffer') {
return mallocArrayBuffer(n)
} else {
switch(dtype) {
case 'uint8':
return mallocUint8(n)
case 'uint16':
return mallocUint16(n)
case 'uint32':
return mallocUint32(n)
case 'int8':
return mallocInt8(n)
case 'int16':
return mallocInt16(n)
case 'int32':
return mallocInt32(n)
case 'float':
case 'float32':
return mallocFloat(n)
case 'double':
case 'float64':
return mallocDouble(n)
case 'uint8_clamped':
return mallocUint8Clamped(n)
case 'buffer':
return mallocBuffer(n)
case 'data':
case 'dataview':
return mallocDataView(n)
default:
return null
}
}
return null
}
function mallocArrayBuffer(n) {
var n = bits.nextPow2(n)
var log_n = bits.log2(n)
var d = DATA[log_n]
if(d.length > 0) {
return d.pop()
}
return new ArrayBuffer(n)
}
exports.mallocArrayBuffer = mallocArrayBuffer
function mallocUint8(n) {
return new Uint8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocUint8 = mallocUint8
function mallocUint16(n) {
return new Uint16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocUint16 = mallocUint16
function mallocUint32(n) {
return new Uint32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocUint32 = mallocUint32
function mallocInt8(n) {
return new Int8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocInt8 = mallocInt8
function mallocInt16(n) {
return new Int16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocInt16 = mallocInt16
function mallocInt32(n) {
return new Int32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocInt32 = mallocInt32
function mallocFloat(n) {
return new Float32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocFloat32 = exports.mallocFloat = mallocFloat
function mallocDouble(n) {
return new Float64Array(mallocArrayBuffer(8*n), 0, n)
}
exports.mallocFloat64 = exports.mallocDouble = mallocDouble
function mallocUint8Clamped(n) {
if(hasUint8C) {
return new Uint8ClampedArray(mallocArrayBuffer(n), 0, n)
} else {
return mallocUint8(n)
}
}
exports.mallocUint8Clamped = mallocUint8Clamped
function mallocDataView(n) {
return new DataView(mallocArrayBuffer(n), 0, n)
}
exports.mallocDataView = mallocDataView
function mallocBuffer(n) {
n = bits.nextPow2(n)
var log_n = bits.log2(n)
var cache = BUFFER[log_n]
if(cache.length > 0) {
return cache.pop()
}
return new Buffer(n)
}
exports.mallocBuffer = mallocBuffer
exports.clearCache = function clearCache() {
for(var i=0; i<32; ++i) {
POOL.UINT8[i].length = 0
POOL.UINT16[i].length = 0
POOL.UINT32[i].length = 0
POOL.INT8[i].length = 0
POOL.INT16[i].length = 0
POOL.INT32[i].length = 0
POOL.FLOAT[i].length = 0
POOL.DOUBLE[i].length = 0
POOL.UINT8C[i].length = 0
DATA[i].length = 0
BUFFER[i].length = 0
}
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
//# sourceMappingURL=data:application/json;charset:utf-8;base64,{"version":3,"sources":["node_modules/surface-nets/node_modules/triangulate-hypercube/node_modules/permutation-parity/node_modules/typedarray-pool/pool.js"],"names":[],"mappings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file":"generated.js","sourceRoot":"","sourcesContent":["'use strict'\n\nvar bits = require('bit-twiddle')\nvar dup = require('dup')\n\n//Legacy pool support\nif(!global.__TYPEDARRAY_POOL) {\n  global.__TYPEDARRAY_POOL = {\n      UINT8   : dup([32, 0])\n    , UINT16  : dup([32, 0])\n    , UINT32  : dup([32, 0])\n    , INT8    : dup([32, 0])\n    , INT16   : dup([32, 0])\n    , INT32   : dup([32, 0])\n    , FLOAT   : dup([32, 0])\n    , DOUBLE  : dup([32, 0])\n    , DATA    : dup([32, 0])\n    , UINT8C  : dup([32, 0])\n    , BUFFER  : dup([32, 0])\n  }\n}\n\nvar hasUint8C = (typeof Uint8ClampedArray) !== 'undefined'\nvar POOL = global.__TYPEDARRAY_POOL\n\n//Upgrade pool\nif(!POOL.UINT8C) {\n  POOL.UINT8C = dup([32, 0])\n}\nif(!POOL.BUFFER) {\n  POOL.BUFFER = dup([32, 0])\n}\n\n//New technique: Only allocate from ArrayBufferView and Buffer\nvar DATA    = POOL.DATA\n  , BUFFER  = POOL.BUFFER\n\nexports.free = function free(array) {\n  if(Buffer.isBuffer(array)) {\n    BUFFER[bits.log2(array.length)].push(array)\n  } else {\n    if(Object.prototype.toString.call(array) !== '[object ArrayBuffer]') {\n      array = array.buffer\n    }\n    if(!array) {\n      return\n    }\n    var n = array.length || array.byteLength\n    var log_n = bits.log2(n)|0\n    DATA[log_n].push(array)\n  }\n}\n\nfunction freeArrayBuffer(buffer) {\n  if(!buffer) {\n    return\n  }\n  var n = buffer.length || buffer.byteLength\n  var log_n = bits.log2(n)\n  DATA[log_n].push(buffer)\n}\n\nfunction freeTypedArray(array) {\n  freeArrayBuffer(array.buffer)\n}\n\nexports.freeUint8 =\nexports.freeUint16 =\nexports.freeUint32 =\nexports.freeInt8 =\nexports.freeInt16 =\nexports.freeInt32 =\nexports.freeFloat32 = \nexports.freeFloat =\nexports.freeFloat64 = \nexports.freeDouble = \nexports.freeUint8Clamped = \nexports.freeDataView = freeTypedArray\n\nexports.freeArrayBuffer = freeArrayBuffer\n\nexports.freeBuffer = function freeBuffer(array) {\n  BUFFER[bits.log2(array.length)].push(array)\n}\n\nexports.malloc = function malloc(n, dtype) {\n  if(dtype === undefined || dtype === 'arraybuffer') {\n    return mallocArrayBuffer(n)\n  } else {\n    switch(dtype) {\n      case 'uint8':\n        return mallocUint8(n)\n      case 'uint16':\n        return mallocUint16(n)\n      case 'uint32':\n        return mallocUint32(n)\n      case 'int8':\n        return mallocInt8(n)\n      case 'int16':\n        return mallocInt16(n)\n      case 'int32':\n        return mallocInt32(n)\n      case 'float':\n      case 'float32':\n        return mallocFloat(n)\n      case 'double':\n      case 'float64':\n        return mallocDouble(n)\n      case 'uint8_clamped':\n        return mallocUint8Clamped(n)\n      case 'buffer':\n        return mallocBuffer(n)\n      case 'data':\n      case 'dataview':\n        return mallocDataView(n)\n\n      default:\n        return null\n    }\n  }\n  return null\n}\n\nfunction mallocArrayBuffer(n) {\n  var n = bits.nextPow2(n)\n  var log_n = bits.log2(n)\n  var d = DATA[log_n]\n  if(d.length > 0) {\n    return d.pop()\n  }\n  return new ArrayBuffer(n)\n}\nexports.mallocArrayBuffer = mallocArrayBuffer\n\nfunction mallocUint8(n) {\n  return new Uint8Array(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocUint8 = mallocUint8\n\nfunction mallocUint16(n) {\n  return new Uint16Array(mallocArrayBuffer(2*n), 0, n)\n}\nexports.mallocUint16 = mallocUint16\n\nfunction mallocUint32(n) {\n  return new Uint32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocUint32 = mallocUint32\n\nfunction mallocInt8(n) {\n  return new Int8Array(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocInt8 = mallocInt8\n\nfunction mallocInt16(n) {\n  return new Int16Array(mallocArrayBuffer(2*n), 0, n)\n}\nexports.mallocInt16 = mallocInt16\n\nfunction mallocInt32(n) {\n  return new Int32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocInt32 = mallocInt32\n\nfunction mallocFloat(n) {\n  return new Float32Array(mallocArrayBuffer(4*n), 0, n)\n}\nexports.mallocFloat32 = exports.mallocFloat = mallocFloat\n\nfunction mallocDouble(n) {\n  return new Float64Array(mallocArrayBuffer(8*n), 0, n)\n}\nexports.mallocFloat64 = exports.mallocDouble = mallocDouble\n\nfunction mallocUint8Clamped(n) {\n  if(hasUint8C) {\n    return new Uint8ClampedArray(mallocArrayBuffer(n), 0, n)\n  } else {\n    return mallocUint8(n)\n  }\n}\nexports.mallocUint8Clamped = mallocUint8Clamped\n\nfunction mallocDataView(n) {\n  return new DataView(mallocArrayBuffer(n), 0, n)\n}\nexports.mallocDataView = mallocDataView\n\nfunction mallocBuffer(n) {\n  n = bits.nextPow2(n)\n  var log_n = bits.log2(n)\n  var cache = BUFFER[log_n]\n  if(cache.length > 0) {\n    return cache.pop()\n  }\n  return new Buffer(n)\n}\nexports.mallocBuffer = mallocBuffer\n\nexports.clearCache = function clearCache() {\n  for(var i=0; i<32; ++i) {\n    POOL.UINT8[i].length = 0\n    POOL.UINT16[i].length = 0\n    POOL.UINT32[i].length = 0\n    POOL.INT8[i].length = 0\n    POOL.INT16[i].length = 0\n    POOL.INT32[i].length = 0\n    POOL.FLOAT[i].length = 0\n    POOL.DOUBLE[i].length = 0\n    POOL.UINT8C[i].length = 0\n    DATA[i].length = 0\n    BUFFER[i].length = 0\n  }\n}"]}
},{"bit-twiddle":19,"buffer":1,"dup":20}],22:[function(require,module,exports){
"use strict"
module.exports = permutationSign
var BRUTE_FORCE_CUTOFF = 32
var pool = require("typedarray-pool")
function permutationSign(p) {
var n = p.length
if(n < BRUTE_FORCE_CUTOFF) {
//Use quadratic algorithm for small n
var sgn = 1
for(var i=0; i<n; ++i) {
for(var j=0; j<i; ++j) {
if(p[i] < p[j]) {
sgn = -sgn
} else if(p[i] === p[j]) {
return 0
}
}
}
return sgn
} else {
//Otherwise use linear time algorithm
var visited = pool.mallocUint8(n)
for(var i=0; i<n; ++i) {
visited[i] = 0
}
var sgn = 1
for(var i=0; i<n; ++i) {
if(!visited[i]) {
var count = 1
visited[i] = 1
for(var j=p[i]; j!==i; j=p[j]) {
if(visited[j]) {
pool.freeUint8(visited)
return 0
}
count += 1
visited[j] = 1
}
if(!(count & 1)) {
sgn = -sgn
}
}
}
pool.freeUint8(visited)
return sgn
}
}
},{"typedarray-pool":21}],23:[function(require,module,exports){
"use strict"
var pool = require("typedarray-pool")
var inverse = require("invert-permutation")
function rank(permutation) {
var n = permutation.length
switch(n) {
case 0:
case 1:
return 0
case 2:
return permutation[1]
default:
break
}
var p = pool.mallocUint32(n)
var pinv = pool.mallocUint32(n)
var r = 0, s, t, i
inverse(permutation, pinv)
for(i=0; i<n; ++i) {
p[i] = permutation[i]
}
for(i=n-1; i>0; --i) {
t = pinv[i]
s = p[i]
p[i] = p[t]
p[t] = s
pinv[i] = pinv[s]
pinv[s] = t
r = (r + s) * i
}
pool.freeUint32(pinv)
pool.freeUint32(p)
return r
}
function unrank(n, r, p) {
switch(n) {
case 0:
if(p) { return p }
return []
case 1:
if(p) {
p[0] = 0
return p
} else {
return [0]
}
case 2:
if(p) {
if(r) {
p[0] = 0
p[1] = 1
} else {
p[0] = 1
p[1] = 0
}
return p
} else {
return r ? [0,1] : [1,0]
}
default:
break
}
p = p || new Array(n)
var s, t, i, nf=1
p[0] = 0
for(i=1; i<n; ++i) {
p[i] = i
nf = (nf*i)|0
}
for(i=n-1; i>0; --i) {
s = (r / nf)|0
r = (r - s * nf)|0
nf = (nf / i)|0
t = p[i]|0
p[i] = p[s]|0
p[s] = t|0
}
return p
}
exports.rank = rank
exports.unrank = unrank
},{"invert-permutation":24,"typedarray-pool":27}],24:[function(require,module,exports){
"use strict"
function invertPermutation(pi, result) {
result = result || new Array(pi.length)
for(var i=0; i<pi.length; ++i) {
result[pi[i]] = i
}
return result
}
module.exports = invertPermutation
},{}],25:[function(require,module,exports){
arguments[4][15][0].apply(exports,arguments)
},{"dup":15}],26:[function(require,module,exports){
arguments[4][16][0].apply(exports,arguments)
},{"dup":16}],27:[function(require,module,exports){
(function (global,Buffer){
'use strict'
var bits = require('bit-twiddle')
var dup = require('dup')
//Legacy pool support
if(!global.__TYPEDARRAY_POOL) {
global.__TYPEDARRAY_POOL = {
UINT8 : dup([32, 0])
, UINT16 : dup([32, 0])
, UINT32 : dup([32, 0])
, INT8 : dup([32, 0])
, INT16 : dup([32, 0])
, INT32 : dup([32, 0])
, FLOAT : dup([32, 0])
, DOUBLE : dup([32, 0])
, DATA : dup([32, 0])
, UINT8C : dup([32, 0])
, BUFFER : dup([32, 0])
}
}
var hasUint8C = (typeof Uint8ClampedArray) !== 'undefined'
var POOL = global.__TYPEDARRAY_POOL
//Upgrade pool
if(!POOL.UINT8C) {
POOL.UINT8C = dup([32, 0])
}
if(!POOL.BUFFER) {
POOL.BUFFER = dup([32, 0])
}
//New technique: Only allocate from ArrayBufferView and Buffer
var DATA = POOL.DATA
, BUFFER = POOL.BUFFER
exports.free = function free(array) {
if(Buffer.isBuffer(array)) {
BUFFER[bits.log2(array.length)].push(array)
} else {
if(Object.prototype.toString.call(array) !== '[object ArrayBuffer]') {
array = array.buffer
}
if(!array) {
return
}
var n = array.length || array.byteLength
var log_n = bits.log2(n)|0
DATA[log_n].push(array)
}
}
function freeArrayBuffer(buffer) {
if(!buffer) {
return
}
var n = buffer.length || buffer.byteLength
var log_n = bits.log2(n)
DATA[log_n].push(buffer)
}
function freeTypedArray(array) {
freeArrayBuffer(array.buffer)
}
exports.freeUint8 =
exports.freeUint16 =
exports.freeUint32 =
exports.freeInt8 =
exports.freeInt16 =
exports.freeInt32 =
exports.freeFloat32 =
exports.freeFloat =
exports.freeFloat64 =
exports.freeDouble =
exports.freeUint8Clamped =
exports.freeDataView = freeTypedArray
exports.freeArrayBuffer = freeArrayBuffer
exports.freeBuffer = function freeBuffer(array) {
BUFFER[bits.log2(array.length)].push(array)
}
exports.malloc = function malloc(n, dtype) {
if(dtype === undefined || dtype === 'arraybuffer') {
return mallocArrayBuffer(n)
} else {
switch(dtype) {
case 'uint8':
return mallocUint8(n)
case 'uint16':
return mallocUint16(n)
case 'uint32':
return mallocUint32(n)
case 'int8':
return mallocInt8(n)
case 'int16':
return mallocInt16(n)
case 'int32':
return mallocInt32(n)
case 'float':
case 'float32':
return mallocFloat(n)
case 'double':
case 'float64':
return mallocDouble(n)
case 'uint8_clamped':
return mallocUint8Clamped(n)
case 'buffer':
return mallocBuffer(n)
case 'data':
case 'dataview':
return mallocDataView(n)
default:
return null
}
}
return null
}
function mallocArrayBuffer(n) {
var n = bits.nextPow2(n)
var log_n = bits.log2(n)
var d = DATA[log_n]
if(d.length > 0) {
return d.pop()
}
return new ArrayBuffer(n)
}
exports.mallocArrayBuffer = mallocArrayBuffer
function mallocUint8(n) {
return new Uint8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocUint8 = mallocUint8
function mallocUint16(n) {
return new Uint16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocUint16 = mallocUint16
function mallocUint32(n) {
return new Uint32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocUint32 = mallocUint32
function mallocInt8(n) {
return new Int8Array(mallocArrayBuffer(n), 0, n)
}
exports.mallocInt8 = mallocInt8
function mallocInt16(n) {
return new Int16Array(mallocArrayBuffer(2*n), 0, n)
}
exports.mallocInt16 = mallocInt16
function mallocInt32(n) {
return new Int32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocInt32 = mallocInt32
function mallocFloat(n) {
return new Float32Array(mallocArrayBuffer(4*n), 0, n)
}
exports.mallocFloat32 = exports.mallocFloat = mallocFloat
function mallocDouble(n) {
return new Float64Array(mallocArrayBuffer(8*n), 0, n)
}
exports.mallocFloat64 = exports.mallocDouble = mallocDouble
function mallocUint8Clamped(n) {
if(hasUint8C) {
return new Uint8ClampedArray(mallocArrayBuffer(n), 0, n)
} else {
return mallocUint8(n)
}
}
exports.mallocUint8Clamped = mallocUint8Clamped
function mallocDataView(n) {
return new DataView(mallocArrayBuffer(n), 0, n)
}
exports.mallocDataView = mallocDataView
function mallocBuffer(n) {
n = bits.nextPow2(n)
var log_n = bits.log2(n)
var cache = BUFFER[log_n]
if(cache.length > 0) {
return cache.pop()
}
return new Buffer(n)
}
exports.mallocBuffer = mallocBuffer
exports.clearCache = function clearCache() {
for(var i=0; i<32; ++i) {
POOL.UINT8[i].length = 0
POOL.UINT16[i].length = 0
POOL.UINT32[i].length = 0
POOL.INT8[i].length = 0
POOL.INT16[i].length = 0
POOL.INT32[i].length = 0
POOL.FLOAT[i].length = 0
POOL.DOUBLE[i].length = 0
POOL.UINT8C[i].length = 0
DATA[i].length = 0
BUFFER[i].length = 0
}
}
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
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