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const regl = require('regl')({ | |
extensions: 'OES_texture_float' | |
}) | |
const N = 256 | |
const initialPosition = Array(N).fill().map((_, i) => | |
Array(N).fill().map((_, j) => [ | |
i, | |
j, | |
i, | |
j | |
])) | |
const squareState = Array(2).fill().map(() => | |
regl.framebuffer({ | |
color: regl.texture({ | |
data: initialPosition, | |
type: 'float', | |
wrap: 'mirror' | |
}), | |
depthStencil: false | |
})) | |
const updateSquare = regl({ | |
frag: ` | |
precision highp float; | |
uniform sampler2D state; | |
uniform vec2 delta; | |
varying vec2 uv; | |
void main () { | |
vec4 s = texture2D(state, uv); | |
vec2 sr = texture2D(state, uv + vec2(delta.x, 0)).xy; | |
vec2 sl = texture2D(state, uv - vec2(delta.x, 0)).xy; | |
vec2 su = texture2D(state, uv + vec2(0, delta.y)).xy; | |
vec2 sd = texture2D(state, uv - vec2(0, delta.y)).xy; | |
vec2 p1 = s.xy; | |
vec2 p0 = s.zw; | |
vec2 d = 0.25 * (sr + sl + su + sd) - p1; | |
float l = length(d); | |
float f = l - 1.0; | |
vec2 n = 2.0 * p1 - p0 + 0.1 * d / l * f; | |
gl_FragColor = vec4(n, p1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 position; | |
varying vec2 uv; | |
void main () { | |
uv = 0.5 * vec2(position.x + 1.0, 1.0 - position.y); | |
gl_Position = vec4(position, 0, 1); | |
} | |
`, | |
attributes: { | |
position: [ | |
-4, 0, | |
4, 4, | |
4, -4 | |
] | |
}, | |
uniforms: { | |
state: ({tick}) => squareState[(tick + 1) % 2], | |
delta: [1.0 / N, 1.0 / N] | |
}, | |
framebuffer: ({tick}) => squareState[tick % 2], | |
count: 3 | |
}) | |
const drawSquare = regl({ | |
frag: ` | |
precision highp float; | |
varying vec2 fuv; | |
void main () { | |
gl_FragColor = vec4(fuv, 1, 1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 uv; | |
uniform sampler2D state; | |
varying vec2 fuv; | |
void main () { | |
fuv = uv; | |
gl_PointSize = 4.0; | |
vec2 p = texture2D(state, uv).xy / float(${N}); | |
gl_Position = vec4(2.0 * (p - floor(p)) - 1.0, 0, 1); | |
} | |
`, | |
attributes: { | |
uv: (() => { | |
const uv = [] | |
for (let i = 0; i < N; ++i) { | |
for (let j = 0; j < N; ++j) { | |
uv.push([i / N, j / N]) | |
} | |
} | |
return uv | |
})() | |
}, | |
uniforms: { | |
state: ({tick}) => squareState[tick % 2] | |
}, | |
count: N * N, | |
primitive: 'points' | |
}) | |
const feedbackTex = regl.texture({ | |
copy: true | |
}) | |
const drawFeedback = regl({ | |
frag: ` | |
precision highp float; | |
uniform sampler2D screen; | |
uniform vec2 delta; | |
varying vec2 uv; | |
void main () { | |
vec4 s = texture2D(screen, uv - 0.01 * (uv - 0.5)); | |
gl_FragColor = vec4(0.99 * s.rgb, 1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 position; | |
varying vec2 uv; | |
void main () { | |
uv = 0.5 * vec2(position.x + 1.0, 1.0 - position.y); | |
gl_Position = vec4(position, 0, 1); | |
} | |
`, | |
attributes: { | |
position: [ | |
-4, 0, | |
4, 4, | |
4, -4 | |
] | |
}, | |
uniforms: { | |
screen: feedbackTex, | |
delta: ({viewportWidth, viewportHeight}) => | |
[1 / viewportWidth, 1 / viewportHeight] | |
}, | |
depth: { | |
enable: false, | |
mask: false | |
}, | |
count: 3 | |
}) | |
console.log('load'); | |
regl.frame(() => { | |
regl.clear({ | |
depth: 1 | |
}) | |
console.log('frame'); | |
updateSquare() | |
drawFeedback() | |
drawSquare() | |
feedbackTex({copy: true}) | |
}) |
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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 | |
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) | |
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) { | |
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) | |
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) | |
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) | |
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) | |
} 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) | |
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) { | |
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) | |
} | |
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 | |
} | |
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 | |
}, | |
_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 | |
} | |
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, ');') | |
} | |
}) | |
// 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) { | |
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) { | |
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) | |
var isStatic = true | |
var x = box.x | 0 | |
var y = box.y | 0 | |
check.command(x >= 0 && y >= 0, 'invalid ' + param) | |
var w, h | |
if ('width' in box) { | |
w = box.width | 0 | |
check.command(w > 0, 'invalid ' + param) | |
} else { | |
isStatic = false | |
} | |
if ('height' in box) { | |
h = box.height | 0 | |
check.command(h > 0, 'invalid ' + param) | |
} 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) | |
} | |
var BOX_H = h | |
if (!('height' in box)) { | |
BOX_H = scope.def(CONTEXT, '.', S_FRAMEBUFFER_HEIGHT, '-', y) | |
} else { | |
check.command(h > 0, 'invalid ' + param) | |
} | |
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) { | |
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)) | |
} else if (elements) { | |
elements = elementState.getElements(elements) | |
check.command(elements, 'invalid elements') | |
} | |
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') | |
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) | |
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') | |
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) { | |
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) | |
return value | |
}, | |
function (env, scope, value) { | |
check.optional(function () { | |
env.assert(scope, | |
'typeof ' + value + '==="boolean"', | |
'invalid flag ' + prop) | |
}) | |
return value | |
}) | |
case S_DEPTH_FUNC: | |
return parseParam( | |
function (value) { | |
check.commandParameter(value, compareFuncs, 'invalid ' + prop) | |
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') | |
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') | |
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') | |
check.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha') | |
check.commandParameter(dstRGB, blendFuncs, param + '.dstRGB') | |
check.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha') | |
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 scope.def(BLEND_FUNCS, '[', func, ']') | |
} | |
var SRC_RGB = read('src', 'RGB') | |
var SRC_ALPHA = read('src', 'Alpha') | |
var DST_RGB = read('dst', 'RGB') | |
var DST_ALPHA = 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) | |
return [ | |
blendEquations[value], | |
blendEquations[value] | |
] | |
} else if (typeof value === 'object') { | |
check.commandParameter( | |
value.rgb, blendEquations, prop + '.rgb') | |
check.commandParameter( | |
value.alpha, blendEquations, prop + '.alpha') | |
return [ | |
blendEquations[value.rgb], | |
blendEquations[value.alpha] | |
] | |
} else { | |
check.commandRaise('invalid blend.equation') | |
} | |
}, | |
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') | |
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) | |
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) | |
var cmp = value.cmp || 'keep' | |
var ref = value.ref || 0 | |
var mask = 'mask' in value ? value.mask : -1 | |
check.commandParameter(cmp, compareFuncs, prop + '.cmp') | |
check.commandType(ref, 'number', prop + '.ref') | |
check.commandType(mask, 'number', prop + '.mask') | |
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) | |
var fail = value.fail || 'keep' | |
var zfail = value.zfail || 'keep' | |
var pass = value.pass || 'keep' | |
check.commandParameter(fail, stencilOps, prop + '.fail') | |
check.commandParameter(zfail, stencilOps, prop + '.zfail') | |
check.commandParameter(pass, stencilOps, prop + '.pass') | |
return [ | |
prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT, | |
stencilOps[fail], | |
stencilOps[zfail], | |
stencilOps[pass] | |
] | |
}, | |
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('pass') | |
] | |
}) | |
case S_POLYGON_OFFSET_OFFSET: | |
return parseParam( | |
function (value) { | |
check.commandType(value, 'object', param) | |
var factor = value.factor | 0 | |
var units = value.units | 0 | |
check.commandType(factor, 'number', param + '.factor') | |
check.commandType(units, 'number', param + '.units') | |
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) | |
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]) | |
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) | |
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') | |
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) | |
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') | |
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 parseOptions (options) { | |
var staticOptions = options.static | |
var dynamicOptions = options.dynamic | |
check.optional(function () { | |
var command = check.guessCommand() | |
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 + '"', | |
command) | |
}) | |
} | |
checkKeys(staticOptions) | |
checkKeys(dynamicOptions) | |
}) | |
var framebuffer = parseFramebuffer(options) | |
var viewportAndScissor = parseViewportScissor(options, framebuffer) | |
var draw = parseDraw(options) | |
var state = parseGLState(options) | |
var shader = parseProgram(options) | |
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 | |
return { | |
framebuffer: framebuffer, | |
draw: draw, | |
shader: shader, | |
state: state, | |
dirty: dirty | |
} | |
} | |
function parseUniforms (uniforms) { | |
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(value.color.length > 0, | |
'missing color attachment for framebuffer sent to uniform "' + name + '"') | |
result = createStaticDecl(function (env) { | |
return env.link(value.color[0]) | |
}) | |
} else { | |
check.raise('invalid data for uniform "' + name + '"') | |
} | |
} 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) | |
return value[i] | |
}), ']') | |
return ITEM | |
}) | |
} else { | |
check.commandRaise('invalid or missing data for uniform "' + name + '"') | |
} | |
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) { | |
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)) | |
record.type = record.buffer.dtype | |
} else { | |
var buffer = bufferState.getBuffer(value) | |
if (buffer) { | |
record.state = ATTRIB_STATE_POINTER | |
record.buffer = buffer | |
record.type = buffer.dtype | |
} else { | |
check.command(typeof value === 'object' && value, | |
'invalid data for attribute ' + attribute) | |
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) | |
CUTE_COMPONENTS.forEach(function (c, i) { | |
if (i < constant.length) { | |
record[c] = constant[i] | |
} | |
}) | |
} | |
} else { | |
buffer = bufferState.getBuffer(value.buffer) | |
check.command(!!buffer, 'missing buffer for attribute "' + attribute + '"') | |
var offset = value.offset | 0 | |
check.command(offset >= 0, | |
'invalid offset for attribute "' + attribute + '"') | |
var stride = value.stride | 0 | |
check.command(stride >= 0 && stride < 256, | |
'invalid stride for attribute "' + attribute + '", must be integer betweeen [0, 255]') | |
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') | |
var normalized = !!value.normalized | |
var type = 0 | |
if ('type' in value) { | |
check.commandParameter( | |
value.type, glTypes, | |
'invalid type for attribute ' + attribute) | |
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') | |
check.command(divisor >= 0, | |
'invalid divisor for attribute "' + attribute + '"') | |
} | |
check.optional(function () { | |
var command = check.guessCommand() | |
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) | |
} | |
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)||' + | |
'("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{', | |
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) { | |
var result = parseOptions(options) | |
result.profile = parseProfile(options) | |
result.uniforms = parseUniforms(uniforms) | |
result.attributes = parseAttributes(attributes) | |
result.context = parseContext(context) | |
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) { | |
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 + '"') | |
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) | |
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) | |
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) | |
}) | |
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) | |
infix = '1f' | |
break | |
case GL_FLOAT_VEC2: | |
check.command( | |
isArrayLike(value) && value.length === 2, | |
'uniform ' + name) | |
infix = '2f' | |
break | |
case GL_FLOAT_VEC3: | |
check.command( | |
isArrayLike(value) && value.length === 3, | |
'uniform ' + name) | |
infix = '3f' | |
break | |
case GL_FLOAT_VEC4: | |
check.command( | |
isArrayLike(value) && value.length === 4, | |
'uniform ' + name) | |
infix = '4f' | |
break | |
case GL_BOOL: | |
check.commandType(value, 'boolean', 'uniform ' + name) | |
infix = '1i' | |
break | |
case GL_INT: | |
check.commandType(value, 'number', 'uniform ' + name) | |
infix = '1i' | |
break | |
case GL_BOOL_VEC2: | |
check.command( | |
isArrayLike(value) && value.length === 2, | |
'uniform ' + name) | |
infix = '2i' | |
break | |
case GL_INT_VEC2: | |
check.command( | |
isArrayLike(value) && value.length === 2, | |
'uniform ' + name) | |
infix = '2i' | |
break | |
case GL_BOOL_VEC3: | |
check.command( | |
isArrayLike(value) && value.length === 3, | |
'uniform ' + name) | |
infix = '3i' | |
break | |
case GL_INT_VEC3: | |
check.command( | |
isArrayLike(value) && value.length === 3, | |
'uniform ' + name) | |
infix = '3i' | |
break | |
case GL_BOOL_VEC4: | |
check.command( | |
isArrayLike(value) && value.length === 4, | |
'uniform ' + name) | |
infix = '4i' | |
break | |
case GL_INT_VEC4: | |
check.command( | |
isArrayLike(value) && value.length === 4, | |
'uniform ' + name) | |
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 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) | |
} | |
function checkTexture (target) { | |
check( | |
'typeof ' + VALUE + '==="function"&&' + | |
VALUE + '._reglType==="texture' + | |
(target === GL_TEXTURE_2D ? '2d' : 'Cube') + '"', | |
'invalid texture type') | |
} | |
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) | |
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)._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) { | |
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 | |
} | |
} | |
},{"./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() | |
}) | |
} | |
}) | |
} | |
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) | |
} | |
}) | |
} | |
},{"./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 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) | |
} | |
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 | |
} | |
} | |
return { | |
create: createRenderbuffer, | |
clear: function () { | |
values(renderbufferSet).forEach(destroy) | |
} | |
} | |
} | |
},{"./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 | |
} | |
} | |
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 | |
}, | |
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') | |
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({ | |
'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, | |
'mipmap': 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 | |
// 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) | |
} | |
} | |
var infoPool = [] | |
function allocInfo () { | |
var result = infoPool.pop() || new TexInfo() | |
TexInfo.call(result) | |
return result | |
} | |
function freeInfo (info) { | |
infoPool.push(info) | |
} | |
// ------------------------------------------------------- | |
// 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 | |
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 = allocInfo() | |
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() | |
freeInfo(texInfo) | |
freeMipMap(mipData) | |
if (config.profile) { | |
texture.stats.size = getTextureSize( | |
texture.internalformat, | |
texture.type, | |
mipData.width, | |
mipData.height, | |
texInfo.genMipmaps, | |
false) | |
} | |
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 = allocInfo() | |
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) | |
} | |
freeInfo(texInfo) | |
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 | |
} | |
} | |
return { | |
create2D: createTexture2D, | |
createCube: createTextureCube, | |
clear: destroyTextures, | |
getTexture: function (wrapper) { | |
return null | |
} | |
} | |
} | |
},{"./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 | |
} | |
} | |
} | |
},{}],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*(.*)$/.exec(errMsg) | |
if (parts) { | |
result.push(new ShaderError( | |
parts[1] | 0, | |
parts[2] | 0, | |
parts[3].trim())) | |
} else if (errMsg.length > 0) { | |
result.push(new ShaderError('unknown', 0, errMsg)) | |
} | |
}) | |
return result | |
} | |
function annotateFiles (files, errors) { | |
errors.forEach(function (error) { | |
var file = files[error.file] | |
if (file) { | |
var line = file.index[error.line] | |
if (line) { | |
line.errors.push(error) | |
file.hasErrors = true | |
return | |
} | |
} | |
files.unknown.hasErrors = true | |
files.unknown.lines[0].errors.push(error) | |
}) | |
} | |
function checkShaderError (gl, shader, source, type, command) { | |
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) { | |
var errLog = gl.getShaderInfoLog(shader) | |
var typeName = type === gl.FRAGMENT_SHADER ? 'fragment' : 'vertex' | |
var files = parseSource(source, command) | |
var errors = parseErrorLog(errLog) | |
annotateFiles(files, errors) | |
Object.keys(files).forEach(function (fileNumber) { | |
var file = files[fileNumber] | |
if (!file.hasErrors) { | |
return | |
} | |
var strings = [''] | |
var styles = [''] | |
function push (str, style) { | |
strings.push(str) | |
styles.push(style || '') | |
} | |
push('file number ' + fileNumber + ': ' + file.name + '\n', 'color:red;text-decoration:underline;font-weight:bold') | |
file.lines.forEach(function (line) { | |
if (line.errors.length > 0) { | |
push(leftPad(line.number, 4) + '| ', 'background-color:yellow; font-weight:bold') | |
push(line.line + '\n', 'color:red; background-color:yellow; font-weight:bold') | |
// try to guess token | |
var offset = 0 | |
line.errors.forEach(function (error) { | |
var message = error.message | |
var token = /^\s*\'(.*)\'\s*\:\s*(.*)$/.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 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 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) { | |
// TODO | |
} | |
function handleContextRestored (event) { | |
// TODO | |
} | |
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() | |
} | |
config.onDestroy() | |
} | |
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 | |
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 (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 = (clock() - START_TIME) / 1000.0 | |
pollViewport() | |
core.procs.poll() | |
} | |
function refresh () { | |
pollViewport() | |
core.procs.refresh() | |
if (timer) { | |
timer.update() | |
} | |
} | |
refresh() | |
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) | |
}, | |
elements: elementState.create, | |
texture: textureState.create2D, | |
cube: textureState.createCube, | |
renderbuffer: renderbufferState.create, | |
framebuffer: framebufferState.create, | |
framebufferCube: framebufferState.createCube, | |
// Expose context attributes | |
attributes: glAttributes, | |
// Frame rendering | |
frame: frame, | |
// 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() | |
} | |
}, | |
// 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    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)\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) {\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          pool.freeType(flatData)\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          pool.freeType(typedData)\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          pool.freeType(flatData)\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    } 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      pool.freeType(transposeData)\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) {\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)\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  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    _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\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\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) {\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) {\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)\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)\n        var w, h\n        if ('width' in box) {\n          w = box.width | 0\n          check.command(w > 0, 'invalid ' + param)\n        } else {\n          isStatic = false\n        }\n        if ('height' in box) {\n          h = box.height | 0\n          check.command(h > 0, 'invalid ' + param)\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)\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)\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) {\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))\n        } else if (elements) {\n          elements = elementState.getElements(elements)\n          check.command(elements, 'invalid elements')\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')\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)\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')\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) {\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)\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)\n              })\n              return value\n            })\n\n        case S_DEPTH_FUNC:\n          return parseParam(\n            function (value) {\n              check.commandParameter(value, compareFuncs, 'invalid ' + prop)\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              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')\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')\n              check.commandParameter(srcAlpha, blendFuncs, param + '.srcAlpha')\n              check.commandParameter(dstRGB, blendFuncs, param + '.dstRGB')\n              check.commandParameter(dstAlpha, blendFuncs, param + '.dstAlpha')\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 scope.def(BLEND_FUNCS, '[', func, ']')\n              }\n\n              var SRC_RGB = read('src', 'RGB')\n              var SRC_ALPHA = read('src', 'Alpha')\n              var DST_RGB = read('dst', 'RGB')\n              var DST_ALPHA = 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)\n                return [\n                  blendEquations[value],\n                  blendEquations[value]\n                ]\n              } else if (typeof value === 'object') {\n                check.commandParameter(\n                  value.rgb, blendEquations, prop + '.rgb')\n                check.commandParameter(\n                  value.alpha, blendEquations, prop + '.alpha')\n                return [\n                  blendEquations[value.rgb],\n                  blendEquations[value.alpha]\n                ]\n              } else {\n                check.commandRaise('invalid blend.equation')\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')\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)\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)\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')\n              check.commandType(ref, 'number', prop + '.ref')\n              check.commandType(mask, 'number', prop + '.mask')\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)\n              var fail = value.fail || 'keep'\n              var zfail = value.zfail || 'keep'\n              var pass = value.pass || 'keep'\n              check.commandParameter(fail, stencilOps, prop + '.fail')\n              check.commandParameter(zfail, stencilOps, prop + '.zfail')\n              check.commandParameter(pass, stencilOps, prop + '.pass')\n              return [\n                prop === S_STENCIL_OPBACK ? GL_BACK : GL_FRONT,\n                stencilOps[fail],\n                stencilOps[zfail],\n                stencilOps[pass]\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('pass')\n              ]\n            })\n\n        case S_POLYGON_OFFSET_OFFSET:\n          return parseParam(\n            function (value) {\n              check.commandType(value, 'object', param)\n              var factor = value.factor | 0\n              var units = value.units | 0\n              check.commandType(factor, 'number', param + '.factor')\n              check.commandType(units, 'number', param + '.units')\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)\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])\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)\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')\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)\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')\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 parseOptions (options) {\n    var staticOptions = options.static\n    var dynamicOptions = options.dynamic\n\n    check.optional(function () {\n      var command = check.guessCommand()\n\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            command)\n        })\n      }\n\n      checkKeys(staticOptions)\n      checkKeys(dynamicOptions)\n    })\n\n    var framebuffer = parseFramebuffer(options)\n    var viewportAndScissor = parseViewportScissor(options, framebuffer)\n    var draw = parseDraw(options)\n    var state = parseGLState(options)\n    var shader = parseProgram(options)\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    return {\n      framebuffer: framebuffer,\n      draw: draw,\n      shader: shader,\n      state: state,\n      dirty: dirty\n    }\n  }\n\n  function parseUniforms (uniforms) {\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(value.color.length > 0,\n            'missing color attachment for framebuffer sent to uniform \"' + name + '\"')\n          result = createStaticDecl(function (env) {\n            return env.link(value.color[0])\n          })\n        } else {\n          check.raise('invalid data for uniform \"' + name + '\"')\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)\n              return value[i]\n            }), ']')\n          return ITEM\n        })\n      } else {\n        check.commandRaise('invalid or missing data for uniform \"' + name + '\"')\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) {\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))\n        record.type = record.buffer.dtype\n      } else {\n        var buffer = bufferState.getBuffer(value)\n        if (buffer) {\n          record.state = ATTRIB_STATE_POINTER\n          record.buffer = buffer\n          record.type = buffer.dtype\n        } else {\n          check.command(typeof value === 'object' && value,\n            'invalid data for attribute ' + attribute)\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)\n              CUTE_COMPONENTS.forEach(function (c, i) {\n                if (i < constant.length) {\n                  record[c] = constant[i]\n                }\n              })\n            }\n          } else {\n            buffer = bufferState.getBuffer(value.buffer)\n            check.command(!!buffer, 'missing buffer for attribute \"' + attribute + '\"')\n\n            var offset = value.offset | 0\n            check.command(offset >= 0,\n              'invalid offset for attribute \"' + attribute + '\"')\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]')\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')\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)\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')\n              check.command(divisor >= 0,\n                'invalid divisor for attribute \"' + attribute + '\"')\n            }\n\n            check.optional(function () {\n              var command = check.guessCommand()\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        }\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            '(\"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          BUFFER, '=', BUFFER_STATE, '.getBuffer(', VALUE, '.buffer);',\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) {\n    var result = parseOptions(options)\n\n    result.profile = parseProfile(options)\n    result.uniforms = parseUniforms(uniforms)\n    result.attributes = parseAttributes(attributes)\n    result.context = parseContext(context)\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 && !env.instancing) {\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 + '\"')\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)\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)\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)\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)\n                infix = '1f'\n                break\n              case GL_FLOAT_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name)\n                infix = '2f'\n                break\n              case GL_FLOAT_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name)\n                infix = '3f'\n                break\n              case GL_FLOAT_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name)\n                infix = '4f'\n                break\n              case GL_BOOL:\n                check.commandType(value, 'boolean', 'uniform ' + name)\n                infix = '1i'\n                break\n              case GL_INT:\n                check.commandType(value, 'number', 'uniform ' + name)\n                infix = '1i'\n                break\n              case GL_BOOL_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name)\n                infix = '2i'\n                break\n              case GL_INT_VEC2:\n                check.command(\n                  isArrayLike(value) && value.length === 2,\n                  'uniform ' + name)\n                infix = '2i'\n                break\n              case GL_BOOL_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name)\n                infix = '3i'\n                break\n              case GL_INT_VEC3:\n                check.command(\n                  isArrayLike(value) && value.length === 3,\n                  'uniform ' + name)\n                infix = '3i'\n                break\n              case GL_BOOL_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name)\n                infix = '4i'\n                break\n              case GL_INT_VEC4:\n                check.command(\n                  isArrayLike(value) && value.length === 4,\n                  'uniform ' + name)\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 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)\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')\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)\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)._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) {\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  }\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  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  })\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 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\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  return {\n    create: createRenderbuffer,\n    clear: function () {\n      values(renderbufferSet).forEach(destroy)\n    }\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  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    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')\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    '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    'mipmap': 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  // 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  var infoPool = []\n\n  function allocInfo () {\n    var result = infoPool.pop() || new TexInfo()\n    TexInfo.call(result)\n    return result\n  }\n\n  function freeInfo (info) {\n    infoPool.push(info)\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    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 = allocInfo()\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      freeInfo(texInfo)\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\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 = allocInfo()\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      freeInfo(texInfo)\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  return {\n    create2D: createTexture2D,\n    createCube: createTextureCube,\n    clear: destroyTextures,\n    getTexture: function (wrapper) {\n      return null\n    }\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  }\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    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\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 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    // TODO\n  }\n\n  function handleContextRestored (event) {\n    // TODO\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    config.onDestroy()\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      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 (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 = (clock() - START_TIME) / 1000.0\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  refresh()\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)\n    },\n    elements: elementState.create,\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\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    // regl Statistics Information\n    stats: stats\n  })\n\n  config.onDone(null, regl)\n\n  return regl\n}\n"]} | |
const regl = require('regl')({ | |
extensions: 'OES_texture_float' | |
}) | |
const N = 256 | |
const initialPosition = Array(N).fill().map((_, i) => | |
Array(N).fill().map((_, j) => [ | |
i, | |
j, | |
i, | |
j | |
])) | |
const squareState = Array(2).fill().map(() => | |
regl.framebuffer({ | |
color: regl.texture({ | |
data: initialPosition, | |
type: 'float', | |
wrap: 'mirror' | |
}), | |
depthStencil: false | |
})) | |
const updateSquare = regl({ | |
frag: ` | |
precision highp float; | |
uniform sampler2D state; | |
uniform vec2 delta; | |
varying vec2 uv; | |
void main () { | |
vec4 s = texture2D(state, uv); | |
vec2 sr = texture2D(state, uv + vec2(delta.x, 0)).xy; | |
vec2 sl = texture2D(state, uv - vec2(delta.x, 0)).xy; | |
vec2 su = texture2D(state, uv + vec2(0, delta.y)).xy; | |
vec2 sd = texture2D(state, uv - vec2(0, delta.y)).xy; | |
vec2 p1 = s.xy; | |
vec2 p0 = s.zw; | |
vec2 d = 0.25 * (sr + sl + su + sd) - p1; | |
float l = length(d); | |
float f = l - 1.0; | |
vec2 n = 2.0 * p1 - p0 + 0.1 * d / l * f; | |
gl_FragColor = vec4(n, p1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 position; | |
varying vec2 uv; | |
void main () { | |
uv = 0.5 * vec2(position.x + 1.0, 1.0 - position.y); | |
gl_Position = vec4(position, 0, 1); | |
} | |
`, | |
attributes: { | |
position: [ | |
-4, 0, | |
4, 4, | |
4, -4 | |
] | |
}, | |
uniforms: { | |
state: ({tick}) => squareState[(tick + 1) % 2], | |
delta: [1.0 / N, 1.0 / N] | |
}, | |
framebuffer: ({tick}) => squareState[tick % 2], | |
count: 3 | |
}) | |
const drawSquare = regl({ | |
frag: ` | |
precision highp float; | |
varying vec2 fuv; | |
void main () { | |
gl_FragColor = vec4(fuv, 1, 1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 uv; | |
uniform sampler2D state; | |
varying vec2 fuv; | |
void main () { | |
fuv = uv; | |
gl_PointSize = 4.0; | |
vec2 p = texture2D(state, uv).xy / float(${N}); | |
gl_Position = vec4(2.0 * (p - floor(p)) - 1.0, 0, 1); | |
} | |
`, | |
attributes: { | |
uv: (() => { | |
const uv = [] | |
for (let i = 0; i < N; ++i) { | |
for (let j = 0; j < N; ++j) { | |
uv.push([i / N, j / N]) | |
} | |
} | |
return uv | |
})() | |
}, | |
uniforms: { | |
state: ({tick}) => squareState[tick % 2] | |
}, | |
count: N * N, | |
primitive: 'points' | |
}) | |
const feedbackTex = regl.texture({ | |
copy: true | |
}) | |
const drawFeedback = regl({ | |
frag: ` | |
precision highp float; | |
uniform sampler2D screen; | |
uniform vec2 delta; | |
varying vec2 uv; | |
void main () { | |
vec4 s = texture2D(screen, uv - 0.01 * (uv - 0.5)); | |
gl_FragColor = vec4(0.99 * s.rgb, 1); | |
} | |
`, | |
vert: ` | |
precision highp float; | |
attribute vec2 position; | |
varying vec2 uv; | |
void main () { | |
uv = 0.5 * vec2(position.x + 1.0, 1.0 - position.y); | |
gl_Position = vec4(position, 0, 1); | |
} | |
`, | |
attributes: { | |
position: [ | |
-4, 0, | |
4, 4, | |
4, -4 | |
] | |
}, | |
uniforms: { | |
screen: feedbackTex, | |
delta: ({viewportWidth, viewportHeight}) => | |
[1 / viewportWidth, 1 / viewportHeight] | |
}, | |
depth: { | |
enable: false, | |
mask: false | |
}, | |
count: 3 | |
}) | |
console.log('load'); | |
regl.frame(() => { | |
regl.clear({ | |
depth: 1 | |
}) | |
console.log('frame'); | |
updateSquare() | |
drawFeedback() | |
drawSquare() | |
feedbackTex({copy: true}) | |
}) | |
;}, 0) |
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{ | |
"name": "requirebin-sketch", | |
"version": "1.0.0", | |
"depdencies": { | |
"regl": "^0.11.0" | |
}, | |
"dependencies": { | |
"regl": "0.11.0" | |
} | |
} |
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<!-- contents of this file will be placed inside the <body> --> |
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<!-- contents of this file will be placed inside the <head> --> |
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