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minimalistic test case for an issue of EaselJS
/*
* Graphics by Grant Skinner. Dec 5, 2010
* Visit http://easeljs.com/ for documentation, updates and examples.
*
*
* Copyright (c) 2010 Grant Skinner
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* The Easel Javascript library provides a retained graphics mode for canvas
* including a full, hierarchical display list, a core interaction model, and
* helper classes to make working with Canvas much easier.
* @module EaselJS
**/
(function(window) {
// used to create the instruction lists used in Graphics:
/**
* Inner class used by the Graphics class. Used to create the instruction lists used in Graphics:
* @class Command
* @for Graphics
* @constructor
**/
function Command(f, params) {
this.f = f;
this.params = params;
}
/**
* @method exec
* @param {Object} scope
**/
Command.prototype.exec = function(scope) { this.f.apply(scope, this.params); }
/**
* The Graphics class exposes an easy to use API for generating vector drawing instructions and drawing them to a specified context.
* Note that you can use Graphics without any dependency on the Easel framework by calling draw() directly,
* or it can be used with the Shape object to draw vector graphics within the context of an Easel display list.<br/><br/>
* Note that all drawing methods in Graphics return the Graphics instance, so they can be chained together. For example, the following
* line of code would generate the instructions to draw a rectangle with a red stroke and blue fill, then render it to the specified
* context2D:<br/>
* myGraphics.beginStroke("#F00").beginFill("#00F").drawRect(20, 20, 100, 50).draw(myContext2D);
* @class Graphics
* @constructor
* @param {String} instructions Optional. This is a string that will be eval'ed in the scope of this Graphics object.
* This provides a mechanism for generating a vector shape from a serialized string. Ex.
* "beginFill('#F00');drawRect(0, 0, 10, 10);"
* @for Graphics
**/
Graphics = function(instructions) {
this.initialize(instructions);
}
var p = Graphics.prototype;
// static public methods:
/**
* Returns a CSS compatible color string based on the specified RGB numeric color values in the format
* "rgba(255,255,255,1.0)", or if alpha is null then in the format "rgb(255,255,255)". For example,
* Graphics.getRGB(50, 100, 150, 0.5) will return "rgba(50,100,150,0.5)". It also supports passing a single hex color
* value as the first param, and an optional alpha value as the second param. For example, Graphics.getRGB(0xFF00FF, 0.2)
* will return "rgba(255,0,255,0.2)".
* @method getRGB
* @static
* @param {Number} r The red component for the color, between 0 and 0xFF (255).
* @param {Number} g The green component for the color, between 0 and 0xFF (255).
* @param {Number} b The blue component for the color, between 0 and 0xFF (255).
* @param {Number} alpha Optional. The alpha component for the color where 0 is fully transparent and 1 is fully opaque.
* @return A CSS compatible color string based on the specified RGB numeric color values in the format
* "rgba(255,255,255,1.0)", or if alpha is null then in the format "rgb(255,255,255)".
**/
Graphics.getRGB = function(r, g, b, alpha) {
if (r != null && b == null) {
alpha = g;
b = r&0xFF;
g = r>>8&0xFF;
r = r>>16&0xFF;
}
if (alpha == null) {
return "rgb("+r+","+g+","+b+")";
} else {
return "rgba("+r+","+g+","+b+","+alpha+")";
}
}
/**
* Returns a CSS compatible color string based on the specified HSL numeric color values in the format "hsla(360,100,100,1.0)",
* or if alpha is null then in the format "hsl(360,100,100)". For example, Graphics.getHSL(150, 100, 70) will return
* "hsl(150,100,70)".
* @method getHSL
* @static
* @param {Number} hue The hue component for the color, between 0 and 360.
* @param {Number} saturation The saturation component for the color, between 0 and 100.
* @param {Number} lightness The lightness component for the color, between 0 and 100.
* @param {Number} alpha Optional. The alpha component for the color where 0 is fully transparent and 1 is fully opaque.
* @return a CSS compatible color string based on the specified HSL numeric color values in the format
* "hsla(360,100,100,1.0)", or if alpha is null then in the format "hsl(360,100,100)". For example,
* Graphics.getHSL(150, 100, 70) will return "hsl(150,100,70)".
**/
Graphics.getHSL = function(hue, saturation, lightness, alpha) {
if (alpha == null) {
return "hsl("+(hue%360)+","+saturation+"%,"+lightness+"%)";
} else {
return "hsla("+(hue%360)+","+saturation+"%,"+lightness+"%,"+alpha+")";
}
}
/**
* Maps numeric values for the caps parameter of setStrokeStyle to corresponding string values.
* This is primarily for use with the tiny API. The mappings are as follows: 0 to "butt",
* 1 to "round", and 2 to "square".
* For example, myGraphics.ss(16, 2) would set the line caps to "square".
* @property STROKE_CAPS_MAP
* @static
* @final
* @type Array[String]
**/
Graphics.STROKE_CAPS_MAP = ["butt", "round", "square"];
/**
* Maps numeric values for the joints parameter of setStrokeStyle to corresponding string values.
* This is primarily for use with the tiny API. The mappings are as follows: 0 to "miter",
* 1 to "round", and 2 to "bevel".
* For example, myGraphics.ss(16, 0, 2) would set the line joints to "bevel".
* @property STROKE_JOINTS_MAP
* @static
* @final
* @type Array[String]
**/
Graphics.STROKE_JOINTS_MAP = ["miter", "round", "bevel"];
/**
* @property _ctx
* @static
* @protected
* @type CanvasRenderingContext2D
**/
Graphics._ctx = document.createElement("canvas").getContext("2d");
/**
* @property beginCmd
* @static
* @protected
* @type Command
**/
Graphics.beginCmd = new Command(Graphics._ctx.beginPath, []);
/**
* @property fillCmd
* @static
* @protected
* @type Command
**/
Graphics.fillCmd = new Command(Graphics._ctx.fill, []);
/**
* @property strokeCmd
* @static
* @protected
* @type Command
**/
Graphics.strokeCmd = new Command(Graphics._ctx.stroke, []);
/**
* @property _strokeInstructions
* @protected
* @type Array[Command]
**/
p._strokeInstructions = null;
/**
* @property _strokeStyleInstructions
* @protected
* @type Array[Command]
**/
p._strokeStyleInstructions = null;
/**
* @property _fillInstructions
* @protected
* @type Array[Command]
**/
p._fillInstructions = null;
/**
* @property _instructions
* @protected
* @type Array[Command]
**/
p._instructions = null;
/**
* @property _oldInstructions
* @protected
* @type Array[Command]
**/
p._oldInstructions = null;
/**
* @property _activeInstructions
* @protected
* @type Array[Command]
**/
p._activeInstructions = null;
/**
* @property _active
* @protected
* @type Boolean
* @default false
**/
p._active = false;
/**
* @property _dirty
* @protected
* @type Boolean
* @default false
**/
p._dirty = false;
/**
* Initialization method.
* @method initialize
* @protected
* @param {String} instructions
**/
p.initialize = function(instructions) {
this.clear();
this._ctx = Graphics._ctx;
with (this) { eval(instructions); }
}
/**
* Draws the display object into the specified context ignoring it's visible, alpha, shadow, and transform.
* Returns true if the draw was handled (useful for overriding functionality).
* NOTE: This method is mainly for internal use, though it may be useful for advanced uses.
* @method draw
* @param {CanvasRenderingContext2D} ctx The canvas 2D context object to draw into.
**/
p.draw = function(ctx) {
if (this._dirty) {
this._updateInstructions();
}
var instr = this._instructions;
for (var i=0, l=instr.length; i<l; i++) {
instr[i].exec(ctx);
}
}
// public methods that map directly to context 2D calls:
/**
* Moves the drawing point to the specified position.
* @method moveTo
* @param {Number} x The x coordinate the drawing point should move to.
* @param {Number} y The y coordinate the drawing point should move to.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.moveTo = function(x, y) {
this._activeInstructions.push(new Command(this._ctx.moveTo, [x, y]));
return this;
}
/**
* Draws a line from the current drawing point to the specified position, which become the new current drawing point.
* For detailed information, read the
* <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#complex-shapes-(paths)">
* whatwg spec</a>.
* @method lineTo
* @param {Number} x The x coordinate the drawing point should draw to.
* @param {Number} y The y coordinate the drawing point should draw to.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.lineTo = function(x, y) {
this._dirty = this._active = true;
this._activeInstructions.push(new Command(this._ctx.lineTo, [x, y]));
return this;
}
/**
* Draws an arc with the specified control points and radius. For detailed information, read the
* <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-arcto">
* whatwg spec</a>.
* @method arcTo
* @param {Number} x1
* @param {Number} y1
* @param {Number} x2
* @param {Number} y2
* @param {Number} radius
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.arcTo = function(x1, y1, x2, y2, radius) {
this._dirty = this._active = true;
this._activeInstructions.push(new Command(this._ctx.arcTo, [x1, y1, x2, y2, radius]));
return this;
}
/**
* Draws an arc defined by the radius, startAngle and endAngle arguments, centered at the position (x, y). For example
* arc(100, 100, 20, 0, Math.PI*2) would draw a full circle with a radius of 20 centered at (100, 100). For detailed
* information, read the
* <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-arc">whatwg spec</a>.
* @method arc
* @param {Number} x
* @param {Number} y
* @param {Number} radius
* @param {Number} startAngle Measured in radians.
* @param {Number} endAngle Measured in radians.
* @param {Boolean} anticlockwise
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.arc = function(x, y, radius, startAngle, endAngle, anticlockwise) {
this._dirty = this._active = true;
if (anticlockwise == null) { anticlockwise = false; }
this._activeInstructions.push(new Command(this._ctx.arc, [x, y, radius, startAngle, endAngle, anticlockwise]));
return this;
}
/**
* Draws a quadratic curve from the current drawing point to (x, y) using the control point (cpx, cpy). For detailed information,
* read the <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-quadraticcurveto">
* whatwg spec</a>.
* @method quadraticCurveTo
* @param {Number} cpx
* @param {Number} cpy
* @param {Number} x
* @param {Number} y
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.quadraticCurveTo = function(cpx, cpy, x, y) {
this._dirty = this._active = true;
this._activeInstructions.push(new Command(this._ctx.quadraticCurveTo, [cpx, cpy, x, y]));
return this;
}
/**
* Draws a bezier curve from the current drawing point to (x, y) using the control points (cp1x, cp1y) and (cp2x, cp2y).
* For detailed information, read the
* <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-beziercurveto">
* whatwg spec</a>.
* method @bezierCurveTo
* @param {Number} cp1x
* @param {Number} cp1y
* @param {Number} cp2x
* @param {Number} cp2y
* @param {Number} x
* @param {Number} y
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.bezierCurveTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
this._dirty = this._active = true;
this._activeInstructions.push(new Command(this._ctx.bezierCurveTo, [cp1x, cp1y, cp2x, cp2y, x, y]));
return this;
}
/**
* Draws a rectangle at (x, y) with the specified width and height using the current fill and/or stroke.
* For detailed information, read the
* <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-rect">
* whatwg spec</a>.
* @method rect
* @param {Number} x
* @param {Number} y
* @param {Number} w Width of the rectangle
* @param {Number} h Height of the rectangle
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.rect = function(x, y, w, h) {
this._dirty = this._active = true;
this._activeInstructions.push(new Command(this._ctx.rect, [x, y, w-1, h]));
return this;
}
/**
* Closes the current path, effectively drawing a line from the current drawing point to the first drawing point specified
* since the fill or stroke was last set.
* @method closePath
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.closePath = function() {
if (this._active) {
this._dirty = true;
this._activeInstructions.push(new Command(this._ctx.closePath, []));
}
return this;
}
// public methods that roughly map to Flash graphics APIs:
/**
* Clears all drawing instructions, effectively reseting this Graphics instance.
* @method clear
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.clear = function() {
this._instructions = [];
this._oldInstructions = [];
this._activeInstructions = [];
this._strokeStyleInstructions = this._strokeInstructions = this._fillInstructions = null;
this._active = this._dirty = false;
return this;
}
/**
* Begins a fill with the specified color. This ends the current subpath.
* @method beginFill
* @param {String} color A CSS compatible color value (ex. "#FF0000" or "rgba(255,0,0,0.5)"). Setting to null will
* result in no fill.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginFill = function(color) {
if (this._active) { this._newPath(); }
this._fillInstructions = color ? [new Command(this._setProp, ["fillStyle", color])] : null;
return this;
}
/**
* Begins a linear gradient fill defined by the line (x0, y0) to (x1, y1). This ends the current subpath. For example, the
* following code defines a black to white vertical gradient ranging from 20px to 120px, and draws a square to display it:<br/>
* myGraphics.beginLinearGradientFill(["#000","#FFF"], [0, 1], 0, 20, 0, 120).drawRect(20, 20, 120, 120);
* @method beginLinearGradientFill
* @param {Array[String]} colors An array of CSS compatible color values. For example, ["#F00","#00F"] would define a gradient
* drawing from red to blue.
* @param {Array[Number]} ratios An array of gradient positions which correspond to the colors. For example, [0.1, 0.9] would draw
* the first color to 10% then interpolating to the second color at 90%.
* @param {Number} x0 The position of the first point defining the line that defines the gradient direction and size.
* @param {Number} y0 The position of the first point defining the line that defines the gradient direction and size.
* @param {Number} x1 The position of the second point defining the line that defines the gradient direction and size.
* @param {Number} y1 The position of the second point defining the line that defines the gradient direction and size.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginLinearGradientFill = function(colors, ratios, x0, y0, x1, y1) {
if (this._active) { this._newPath(); }
var o = this._ctx.createLinearGradient(x0, y0, x1, y1);
for (var i=0, l=colors.length; i<l; i++) {
o.addColorStop(ratios[i], colors[i]);
}
this._fillInstructions = [new Command(this._setProp, ["fillStyle", o])];
return this;
}
/**
* Begins a radial gradient fill. This ends the current subpath. For example, the following code defines a red to blue radial
* gradient centered at (100, 100), with a radius of 50, and draws a circle to display it:<br/>
* myGraphics.beginRadialGradientFill(["#F00","#00F"], [0, 1], 100, 100, 0, 100, 100, 50).drawCircle(100, 100, 50);
* @method beginRadialGradientFill
* @param {Array[String]} colors An array of CSS compatible color values. For example, ["#F00","#00F"] would define a gradient
* drawing from red to blue.
* @param {Array[Number]} ratios An array of gradient positions which correspond to the colors. For example, [0.1, 0.9] would
* draw the first color to 10% then interpolating to the second color at 90%.
* @param {Number} x0 Center position of the inner circle that defines the gradient.
* @param {Number} y0 Center position of the inner circle that defines the gradient.
* @param {Number} r0 Radius of the inner circle that defines the gradient.
* @param {Number} x1 Center position of the outer circle that defines the gradient.
* @param {Number} y1 Center position of the outer circle that defines the gradient.
* @param {Number} r1 Radius of the outer circle that defines the gradient.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginRadialGradientFill = function(colors, ratios, x0, y0, r0, x1, y1, r1) {
if (this._active) { this._newPath(); }
var o = this._ctx.createRadialGradient(x0, y0, r0, x1, y1, r1);
for (var i=0, l=colors.length; i<l; i++) {
o.addColorStop(ratios[i], colors[i]);
}
this._fillInstructions = [new Command(this._setProp, ["fillStyle", o])];
return this;
}
/**
* Begins a pattern fill using the specified image. This ends the current subpath.
* @method beginBitmapFill
* @param image The Image, Canvas, or Video object to use as the pattern.
* @param {String} repetition Optional. Indicates whether to repeat the image in the fill area. One of "repeat", "repeat-x",
* "repeat-y", or "no-repeat". Defaults to "repeat".
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginBitmapFill = function(image, repetition) {
if (this._active) { this._newPath(); }
repetition = repetition || "";
var o = this._ctx.createPattern(image, repetition);
this._fillInstructions = [new Command(this._setProp, ["fillStyle", o])];
return this;
}
/**
* Ends the current subpath, and begins a new one with no fill. Functionally identical to beginFill(null).
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.endFill = function() {
this.beginFill(null);
return this;
}
/**
* Sets the stroke style for the current subpath. Like all drawing methods, this can be chained, so you can define the stroke style and color in a single line of code like so:
* myGraphics.setStrokeStyle(8,"round").beginStroke("#F00");
* @param thickness The width of the stroke.
* @param caps Optional. Indicates the type of caps to use at the end of lines. One of butt, round, or square. Defaults to "butt". Also accepts the values 0 (butt), 1 (round), and 2 (square) for use with the tiny API.
* @param joints Optional. Specifies the type of joints that should be used where two lines meet. One of bevel, round, or miter. Defaults to "miter". Also accepts the values 0 (miter), 1 (round), and 2 (bevel) for use with the tiny API.
* @param miter Optional. If joints is set to "miter", then you can specify a miter limit ratio which controls at what point a mitered joint will be clipped.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.setStrokeStyle = function(thickness, caps, joints, miterLimit) {
if (this._active) { this._newPath(); }
this._strokeStyleInstructions = [
new Command(this._setProp, ["lineWidth", (thickness == null ? "1" : thickness)]),
new Command(this._setProp, ["lineCap", (caps == null ? "butt" : (isNaN(caps) ? caps : Graphics.STROKE_CAPS_MAP[caps]))]),
new Command(this._setProp, ["lineJoin", (joints == null ? "miter" : (isNaN(joints) ? joints : Graphics.STROKE_JOINTS_MAP[joints]))]),
new Command(this._setProp, ["miterLimit", (miterLimit == null ? "10" : miterLimit)])
];
return this;
}
/**
* Begins a stroke with the specified color. This ends the current subpath.
* @param color A CSS compatible color value (ex. "#FF0000" or "rgba(255,0,0,0.5)"). Setting to null will result in no stroke.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginStroke = function(color) {
if (this._active) { this._newPath(); }
this._strokeInstructions = color ? [new Command(this._setProp, ["strokeStyle", color])] : null;
return this;
}
/**
* Begins a linear gradient stroke defined by the line (x0, y0) to (x1, y1). This ends the current subpath. For example, the following code defines a black to white vertical gradient ranging from 20px to 120px, and draws a square to display it:<br/>
* myGraphics.setStrokeStyle(10).beginLinearGradientStroke(["#000","#FFF"], [0, 1], 0, 20, 0, 120).drawRect(20, 20, 120, 120);
* @param colors An array of CSS compatible color values. For example, ["#F00","#00F"] would define a gradient drawing from red to blue.
* @param ratios An array of gradient positions which correspond to the colors. For example, [0.1, 0.9] would draw the first color to 10% then interpolating to the second color at 90%.
* @param x0 The position of the first point defining the line that defines the gradient direction and size.
* @param y0 The position of the first point defining the line that defines the gradient direction and size.
* @param x1 The position of the second point defining the line that defines the gradient direction and size.
* @param y1 The position of the second point defining the line that defines the gradient direction and size.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginLinearGradientStroke = function(colors, ratios, x0, y0, x1, y1) {
if (this._active) { this._newPath(); }
var o = this._ctx.createLinearGradient(x0, y0, x1, y1);
for (var i=0, l=colors.length; i<l; i++) {
o.addColorStop(ratios[i], colors[i]);
}
this._strokeInstructions = [new Command(this._setProp, ["strokeStyle", o])];
return this;
}
/**
* Begins a radial gradient stroke. This ends the current subpath. For example, the following code defines a red to blue radial gradient centered at (100, 100), with a radius of 50, and draws a rectangle to display it:<br/>
* myGraphics.setStrokeStyle(10).beginRadialGradientStroke(["#F00","#00F"], [0, 1], 100, 100, 0, 100, 100, 50).drawRect(50, 90, 150, 110);
* @param colors An array of CSS compatible color values. For example, ["#F00","#00F"] would define a gradient drawing from red to blue.
* @param ratios An array of gradient positions which correspond to the colors. For example, [0.1, 0.9] would draw the first color to 10% then interpolating to the second color at 90%, then draw the second color to 100%.
* @param x0 Center position of the inner circle that defines the gradient.
* @param y0 Center position of the inner circle that defines the gradient.
* @param r0 Radius of the inner circle that defines the gradient.
* @param x1 Center position of the outer circle that defines the gradient.
* @param y1 Center position of the outer circle that defines the gradient.
* @param r1 Radius of the outer circle that defines the gradient.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginRadialGradientStroke = function(colors, ratios, x0, y0, r0, x1, y1, r1) {
if (this._active) { this._newPath(); }
var o = this._ctx.createRadialGradient(x0, y0, r0, x1, y1, r1);
for (var i=0, l=colors.length; i<l; i++) {
o.addColorStop(ratios[i], colors[i]);
}
this._strokeInstructions = [new Command(this._setProp, ["strokeStyle", o])];
return this;
}
/**
* Begins a pattern fill using the specified image. This ends the current subpath.
* @param {Image | HTMLCanvasElement | HTMLVideoElement} image The Image, Canvas, or Video object to use as the pattern.
* @param {String} repetition Optional. Indicates whether to repeat the image in the fill area. One of "repeat", "repeat-x",
* "repeat-y", or "no-repeat". Defaults to "repeat".
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.beginBitmapStroke = function(image, repetition) {
if (this._active) { this._newPath(); }
repetition = repetition || "";
var o = this._ctx.createPattern(image, repetition);
this._strokeInstructions = [new Command(this._setProp, ["strokeStyle", o])];
return this;
}
/**
* Ends the current subpath, and begins a new one with no stroke. Functionally identical to beginStroke(null).
* @method endStroke
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.endStroke = function() {
this.beginStroke(null);
return this;
}
/**
* Maps the familiar ActionScript curveTo() method to the functionally similar quatraticCurveTo() method.
* @property curveTo
* @type Function
**/
p.curveTo = p.quadraticCurveTo;
/**
* Maps the familiar ActionScript drawRect() method to the functionally similar rect() method.
* @property drawRect
* @type Function
**/
p.drawRect = p.rect;
/**
* Draws a rounded rectangle with all corners with the specified radius.
* @method drawRoundRect
* @param {Number} x
* @param {Number} y
* @param {Number} w
* @param {Number} h
* @param {Number} radius Corner radius.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.drawRoundRect = function(x, y, w, h, radius) {
this.drawRoundRectComplex(x, y, w, h, radius, radius, radius, radius);
return this;
}
/**
* Draws a rounded rectangle with different corner radiuses.
* @method drawRoundRectComplex
* @param {Number} x
* @param {Number} y
* @param {Number} w
* @param {Number} h
* @param {Number} radiusTL Top left corner radius.
* @param {Number} radiusTR Top right corner radius.
* @param {Number} radiusBR Bottom right corner radius.
* @param {Number} radiusBL Bottom left corner radius.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.drawRoundRectComplex = function(x, y, w, h, radiusTL, radiusTR, radiusBR, radiusBL) {
this._dirty = this._active = true;
this._activeInstructions.push(
new Command(this._ctx.moveTo, [x+radiusTL, y]),
new Command(this._ctx.lineTo, [x+w-radiusTR, y]),
new Command(this._ctx.arc, [x+w-radiusTR, y+radiusTR, radiusTR, (-Math.PI/2), 0, false]),
new Command(this._ctx.lineTo, [x+w, y+h-radiusBR]),
new Command(this._ctx.arc, [x+w-radiusBR, y+h-radiusBR, radiusBR, 0, Math.PI/2, false]),
new Command(this._ctx.lineTo, [x+radiusBL, y+h]),
new Command(this._ctx.arc, [x+radiusBL, y+h-radiusBL, radiusBL, Math.PI/2, Math.PI, false]),
new Command(this._ctx.lineTo, [x, y+radiusTL]),
new Command(this._ctx.arc, [x+radiusTL, y+radiusTL, radiusTL, Math.PI, Math.PI*3/2, false])
);
return this;
}
/**
* Draws a circle with the specified radius at (x, y).
* @method drawCircle
* @param {Number} x x coordinate center point of circle.
* @param {Number} y y coordinate center point of circle.
* @param {Number} radius Radius of circle.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.drawCircle = function(x, y, radius) {
this.arc(x, y, radius, 0, Math.PI*2);
return this;
}
/**
* Draws an ellipse (oval).
* @method drawEllipse
* @param {Number} x
* @param {Number} y
* @param {Number} w
* @param {Number} h
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.drawEllipse = function(x, y, w, h) {
this._dirty = this._active = true;
var k = 0.5522848;
var ox = (w / 2) * k;
var oy = (h / 2) * k;
var xe = x + w;
var ye = y + h;
var xm = x + w / 2;
var ym = y + h / 2;
this._activeInstructions.push(
new Command(this._ctx.moveTo, [x, ym]),
new Command(this._ctx.bezierCurveTo, [x, ym-oy, xm-ox, y, xm, y]),
new Command(this._ctx.bezierCurveTo, [xm+ox, y, xe, ym-oy, xe, ym]),
new Command(this._ctx.bezierCurveTo, [xe, ym+oy, xm+ox, ye, xm, ye]),
new Command(this._ctx.bezierCurveTo, [xm-ox, ye, x, ym+oy, x, ym])
);
return this;
}
/**
* Draws a star if pointSize is greater than 0 or a regular polygon if pointSize is 0 with the specified number of points.
* For example, the following code will draw a familiar 5 pointed star shape centered at 100, 100 and with a radius of 50:
* myGraphics.beginFill("#FF0").drawPolyStar(100, 100, 50, 5, 0.6, -90); // -90 makes the first point vertical
* @method drawPolyStar
* @param {Number} x Position of the center of the shape.
* @param {Number} y Position of the center of the shape.
* @param {Number} radius The outer radius of the shape.
* @param {Number} sides The number of points on the star or sides on the polygon.
* @param {Number} pointSize The depth or "pointy-ness" of the star points. A pointSize of 0 will draw a regular polygon (no points),
* a pointSize of 1 will draw nothing because the points are infinitely pointy.
* @param {Number} angle The angle of the first point / corner. For example a value of 0 will draw the first point directly to the
* right of the center.
* @return {Graphics} The Graphics instance the method is called on (useful for chaining calls.)
**/
p.drawPolyStar = function(x, y, radius, sides, pointSize, angle) {
this._dirty = this._active = true;
if (pointSize == null) { pointSize = 0; }
pointSize = 1-pointSize;
if (angle == null) { angle = 0; }
else { angle /= 180/Math.PI; }
var a = Math.PI/sides;
this._activeInstructions.push(new Command(this._ctx.moveTo, [x+Math.cos(angle)*radius, y+Math.sin(angle)*radius]));
for (var i=0; i<sides; i++) {
angle += a;
if (pointSize != 1) {
this._activeInstructions.push(new Command(this._ctx.lineTo, [x+Math.cos(angle)*radius*pointSize, y+Math.sin(angle)*radius*pointSize]));
}
angle += a;
this._activeInstructions.push(new Command(this._ctx.lineTo, [x+Math.cos(angle)*radius, y+Math.sin(angle)*radius]));
}
return this;
}
/**
* Returns a clone of this Graphics instance.
* @method clone
@return {Graphics} A clone of the current Graphics instance.
**/
p.clone = function() {
var o = new Graphics();
o._instructions = this._instructions.slice();
o._activeInstructions = this._activeInstructions.slice();
o._oldInstructions = this._oldInstructions.slice();
if (this._fillInstructions) { o._fillInstructions = this._fillInstructions.slice(); }
if (this._strokeInstructions) { o._strokeInstructions = this._strokeInstructions.slice(); }
if (this._strokeStyleInstructions) { o._strokeStyleInstructions = this._strokeStyleInstructions.slice(); }
o._active = this._active;
o._dirty = this._dirty;
return o;
}
/**
* Returns a string representation of this object.
* @method toString
* @return {String} a string representation of the instance.
**/
p.toString = function() {
return "[Graphics]";
}
// tiny API:
/** Shortcut to moveTo.
* @property mt
* @protected
* type Function
**/
p.mt = p.moveTo;
/** Shortcut to lineTo.
* @property lt
* @protected
* type Function
**/
p.lt = p.lineTo;
/** Shortcut to arcTo.
* @property at
* @protected
* type Function
**/
p.at = p.arcTo;
/** Shortcut to bezierCurveTo.
* @property bt
* @protected
* type Function
**/
p.bt = p.bezierCurveTo;
/** Shortcut to quadraticCurveTo / curveTo.
* @property qt
* @protected
* type Function
**/
p.qt = p.quadraticCurveTo;
/** Shortcut to arc.
* @property a
* @protected
* type Function
**/
p.a = p.arc;
/** Shortcut to rect.
* @property r
* @protected
* type Function
**/
p.r = p.rect;
/** Shortcut to closePath.
* @property cp
* @protected
* type Function
**/
p.cp = p.closePath;
/** Shortcut to clear.
* @property c
* @protected
* type Function
**/
p.c = p.clear;
/** Shortcut to beginFill.
* @property f
* @protected
* type Function
**/
p.f = p.beginFill;
/** Shortcut to beginLinearGradientFill.
* @property lf
* @protected
* type Function
**/
p.lf = p.beginLinearGradientFill;
/** Shortcut to beginRadialGradientFill.
* @property rf
* @protected
* type Function
**/
p.rf = p.beginRadialGradientFill;
/** Shortcut to beginBitmapFill.
* @property bf
* @protected
* type Function
**/
p.bf = p.beginBitmapFill;
/** Shortcut to endFill.
* @property ef
* @protected
* type Function
**/
p.ef = p.endFill;
/** Shortcut to setStrokeStyle.
* @property ss
* @protected
* type Function
**/
p.ss = p.setStrokeStyle;
/** Shortcut to beginStroke.
* @property s
* @protected
* type Function
**/
p.s = p.beginStroke;
/** Shortcut to beginLinearGradientStroke.
* @property ls
* @protected
* type Function
**/
p.ls = p.beginLinearGradientStroke;
/** Shortcut to beginRadialGradientStroke.
* @property rs
* @protected
* type Function
**/
p.rs = p.beginRadialGradientStroke;
/** Shortcut to beginBitmapStroke.
* @property bs
* @protected
* type Function
**/
p.bs = p.beginBitmapStroke;
/** Shortcut to endStroke.
* @property es
* @protected
* type Function
**/
p.es = p.endStroke;
/** Shortcut to drawRect.
* @property dr
* @protected
* type Function
**/
p.dr = p.drawRect;
/** Shortcut to drawRoundRect.
* @property rr
* @protected
* type Function
**/
p.rr = p.drawRoundRect;
/** Shortcut to drawRoundRectComplex.
* @property rc
* @protected
* type Function
**/
p.rc = p.drawRoundRectComplex;
/** Shortcut to drawCircle.
* @property dc
* @protected
* type Function
**/
p.dc = p.drawCircle;
/** Shortcut to drawEllipse.
* @property de
* @protected
* type Function
**/
p.de = p.drawEllipse;
/** Shortcut to drawPolyStar.
* @property dp
* @protected
* type Function
**/
p.dp = p.drawPolyStar;
// private methods:
/**
* @method _updateInstructions
* @protected
**/
p._updateInstructions = function() {
this._instructions = this._oldInstructions.slice()
this._instructions.push(Graphics.beginCmd);
if (this._fillInstructions) { this._instructions.push.apply(this._instructions, this._fillInstructions); }
if (this._strokeInstructions) {
this._instructions.push.apply(this._instructions, this._strokeInstructions);
if (this._strokeStyleInstructions) {
this._instructions.push.apply(this._instructions, this._strokeStyleInstructions);
}
}
this._instructions.push.apply(this._instructions, this._activeInstructions);
if (this._fillInstructions) { this._instructions.push(Graphics.fillCmd); }
if (this._strokeInstructions) { this._instructions.push(Graphics.strokeCmd); }
}
/**
* @method _newPath
* @protected
**/
p._newPath = function() {
if (this._dirty) { this._updateInstructions(); }
this._oldInstructions = this._instructions;
this._activeInstructions = [];
this._active = this._dirty = false;
}
// used to create Commands that set properties:
/**
* used to create Commands that set properties
* @method _setProp
* @param {String} name
* @param {String} value
* @protected
**/
p._setProp = function(name, value) {
this[name] = value;
}
window.Graphics = Graphics;
}(window));
<html>
<head>
<title>Test</title>
<script type="text/javascript" src="Graphics.js"></script>
</head>
<body>Test</body>
</html>
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