eads@18: // Copyright 2006 Google Inc.
eads@18: //
eads@18: // Licensed under the Apache License, Version 2.0 (the "License");
eads@18: // you may not use this file except in compliance with the License.
eads@18: // You may obtain a copy of the License at
eads@18: //
eads@18: // http://www.apache.org/licenses/LICENSE-2.0
eads@18: //
eads@18: // Unless required by applicable law or agreed to in writing, software
eads@18: // distributed under the License is distributed on an "AS IS" BASIS,
eads@18: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
eads@18: // See the License for the specific language governing permissions and
eads@18: // limitations under the License.
eads@18:
eads@18:
eads@18: // Known Issues:
eads@18: //
eads@18: // * Patterns are not implemented.
eads@18: // * Radial gradient are not implemented. The VML version of these look very
eads@18: // different from the canvas one.
eads@18: // * Clipping paths are not implemented.
eads@18: // * Coordsize. The width and height attribute have higher priority than the
eads@18: // width and height style values which isn't correct.
eads@18: // * Painting mode isn't implemented.
eads@18: // * Canvas width/height should is using content-box by default. IE in
eads@18: // Quirks mode will draw the canvas using border-box. Either change your
eads@18: // doctype to HTML5
eads@18: // (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
eads@18: // or use Box Sizing Behavior from WebFX
eads@18: // (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
eads@18: // * Optimize. There is always room for speed improvements.
eads@18:
eads@18: // only add this code if we do not already have a canvas implementation
eads@18: if (!window.CanvasRenderingContext2D) {
eads@18:
eads@18: (function () {
eads@18:
eads@18: // alias some functions to make (compiled) code shorter
eads@18: var m = Math;
eads@18: var mr = m.round;
eads@18: var ms = m.sin;
eads@18: var mc = m.cos;
eads@18:
eads@18: // this is used for sub pixel precision
eads@18: var Z = 10;
eads@18: var Z2 = Z / 2;
eads@18:
eads@18: var G_vmlCanvasManager_ = {
eads@18: init: function (opt_doc) {
eads@18: var doc = opt_doc || document;
eads@18: if (/MSIE/.test(navigator.userAgent) && !window.opera) {
eads@18: var self = this;
eads@18: doc.attachEvent("onreadystatechange", function () {
eads@18: self.init_(doc);
eads@18: });
eads@18: }
eads@18: },
eads@18:
eads@18: init_: function (doc) {
eads@18: if (doc.readyState == "complete") {
eads@18: // create xmlns
eads@18: if (!doc.namespaces["g_vml_"]) {
eads@18: doc.namespaces.add("g_vml_", "urn:schemas-microsoft-com:vml");
eads@18: }
eads@18:
eads@18: // setup default css
eads@18: var ss = doc.createStyleSheet();
eads@18: ss.cssText = "canvas{display:inline-block;overflow:hidden;" +
eads@18: // default size is 300x150 in Gecko and Opera
eads@18: "text-align:left;width:300px;height:150px}" +
eads@18: "g_vml_\\:*{behavior:url(#default#VML)}";
eads@18:
eads@18: // find all canvas elements
eads@18: var els = doc.getElementsByTagName("canvas");
eads@18: for (var i = 0; i < els.length; i++) {
eads@18: if (!els[i].getContext) {
eads@18: this.initElement(els[i]);
eads@18: }
eads@18: }
eads@18: }
eads@18: },
eads@18:
eads@18: fixElement_: function (el) {
eads@18: // in IE before version 5.5 we would need to add HTML: to the tag name
eads@18: // but we do not care about IE before version 6
eads@18: var outerHTML = el.outerHTML;
eads@18:
eads@18: var newEl = el.ownerDocument.createElement(outerHTML);
eads@18: // if the tag is still open IE has created the children as siblings and
eads@18: // it has also created a tag with the name "/FOO"
eads@18: if (outerHTML.slice(-2) != "/>") {
eads@18: var tagName = "/" + el.tagName;
eads@18: var ns;
eads@18: // remove content
eads@18: while ((ns = el.nextSibling) && ns.tagName != tagName) {
eads@18: ns.removeNode();
eads@18: }
eads@18: // remove the incorrect closing tag
eads@18: if (ns) {
eads@18: ns.removeNode();
eads@18: }
eads@18: }
eads@18: el.parentNode.replaceChild(newEl, el);
eads@18: return newEl;
eads@18: },
eads@18:
eads@18: /**
eads@18: * Public initializes a canvas element so that it can be used as canvas
eads@18: * element from now on. This is called automatically before the page is
eads@18: * loaded but if you are creating elements using createElement you need to
eads@18: * make sure this is called on the element.
eads@18: * @param {HTMLElement} el The canvas element to initialize.
eads@18: * @return {HTMLElement} the element that was created.
eads@18: */
eads@18: initElement: function (el) {
eads@18: el = this.fixElement_(el);
eads@18: el.getContext = function () {
eads@18: if (this.context_) {
eads@18: return this.context_;
eads@18: }
eads@18: return this.context_ = new CanvasRenderingContext2D_(this);
eads@18: };
eads@18:
eads@18: // do not use inline function because that will leak memory
eads@18: el.attachEvent('onpropertychange', onPropertyChange);
eads@18: el.attachEvent('onresize', onResize);
eads@18:
eads@18: var attrs = el.attributes;
eads@18: if (attrs.width && attrs.width.specified) {
eads@18: // TODO: use runtimeStyle and coordsize
eads@18: // el.getContext().setWidth_(attrs.width.nodeValue);
eads@18: el.style.width = attrs.width.nodeValue + "px";
eads@18: } else {
eads@18: el.width = el.clientWidth;
eads@18: }
eads@18: if (attrs.height && attrs.height.specified) {
eads@18: // TODO: use runtimeStyle and coordsize
eads@18: // el.getContext().setHeight_(attrs.height.nodeValue);
eads@18: el.style.height = attrs.height.nodeValue + "px";
eads@18: } else {
eads@18: el.height = el.clientHeight;
eads@18: }
eads@18: //el.getContext().setCoordsize_()
eads@18: return el;
eads@18: }
eads@18: };
eads@18:
eads@18: function onPropertyChange(e) {
eads@18: var el = e.srcElement;
eads@18:
eads@18: switch (e.propertyName) {
eads@18: case 'width':
eads@18: el.style.width = el.attributes.width.nodeValue + "px";
eads@18: el.getContext().clearRect();
eads@18: break;
eads@18: case 'height':
eads@18: el.style.height = el.attributes.height.nodeValue + "px";
eads@18: el.getContext().clearRect();
eads@18: break;
eads@18: }
eads@18: }
eads@18:
eads@18: function onResize(e) {
eads@18: var el = e.srcElement;
eads@18: if (el.firstChild) {
eads@18: el.firstChild.style.width = el.clientWidth + 'px';
eads@18: el.firstChild.style.height = el.clientHeight + 'px';
eads@18: }
eads@18: }
eads@18:
eads@18: G_vmlCanvasManager_.init();
eads@18:
eads@18: // precompute "00" to "FF"
eads@18: var dec2hex = [];
eads@18: for (var i = 0; i < 16; i++) {
eads@18: for (var j = 0; j < 16; j++) {
eads@18: dec2hex[i * 16 + j] = i.toString(16) + j.toString(16);
eads@18: }
eads@18: }
eads@18:
eads@18: function createMatrixIdentity() {
eads@18: return [
eads@18: [1, 0, 0],
eads@18: [0, 1, 0],
eads@18: [0, 0, 1]
eads@18: ];
eads@18: }
eads@18:
eads@18: function matrixMultiply(m1, m2) {
eads@18: var result = createMatrixIdentity();
eads@18:
eads@18: for (var x = 0; x < 3; x++) {
eads@18: for (var y = 0; y < 3; y++) {
eads@18: var sum = 0;
eads@18:
eads@18: for (var z = 0; z < 3; z++) {
eads@18: sum += m1[x][z] * m2[z][y];
eads@18: }
eads@18:
eads@18: result[x][y] = sum;
eads@18: }
eads@18: }
eads@18: return result;
eads@18: }
eads@18:
eads@18: function copyState(o1, o2) {
eads@18: o2.fillStyle = o1.fillStyle;
eads@18: o2.lineCap = o1.lineCap;
eads@18: o2.lineJoin = o1.lineJoin;
eads@18: o2.lineWidth = o1.lineWidth;
eads@18: o2.miterLimit = o1.miterLimit;
eads@18: o2.shadowBlur = o1.shadowBlur;
eads@18: o2.shadowColor = o1.shadowColor;
eads@18: o2.shadowOffsetX = o1.shadowOffsetX;
eads@18: o2.shadowOffsetY = o1.shadowOffsetY;
eads@18: o2.strokeStyle = o1.strokeStyle;
eads@18: o2.arcScaleX_ = o1.arcScaleX_;
eads@18: o2.arcScaleY_ = o1.arcScaleY_;
eads@18: }
eads@18:
eads@18: function processStyle(styleString) {
eads@18: var str, alpha = 1;
eads@18:
eads@18: styleString = String(styleString);
eads@18: if (styleString.substring(0, 3) == "rgb") {
eads@18: var start = styleString.indexOf("(", 3);
eads@18: var end = styleString.indexOf(")", start + 1);
eads@18: var guts = styleString.substring(start + 1, end).split(",");
eads@18:
eads@18: str = "#";
eads@18: for (var i = 0; i < 3; i++) {
eads@18: str += dec2hex[Number(guts[i])];
eads@18: }
eads@18:
eads@18: if ((guts.length == 4) && (styleString.substr(3, 1) == "a")) {
eads@18: alpha = guts[3];
eads@18: }
eads@18: } else {
eads@18: str = styleString;
eads@18: }
eads@18:
eads@18: return [str, alpha];
eads@18: }
eads@18:
eads@18: function processLineCap(lineCap) {
eads@18: switch (lineCap) {
eads@18: case "butt":
eads@18: return "flat";
eads@18: case "round":
eads@18: return "round";
eads@18: case "square":
eads@18: default:
eads@18: return "square";
eads@18: }
eads@18: }
eads@18:
eads@18: /**
eads@18: * This class implements CanvasRenderingContext2D interface as described by
eads@18: * the WHATWG.
eads@18: * @param {HTMLElement} surfaceElement The element that the 2D context should
eads@18: * be associated with
eads@18: */
eads@18: function CanvasRenderingContext2D_(surfaceElement) {
eads@18: this.m_ = createMatrixIdentity();
eads@18:
eads@18: this.mStack_ = [];
eads@18: this.aStack_ = [];
eads@18: this.currentPath_ = [];
eads@18:
eads@18: // Canvas context properties
eads@18: this.strokeStyle = "#000";
eads@18: this.fillStyle = "#000";
eads@18:
eads@18: this.lineWidth = 1;
eads@18: this.lineJoin = "miter";
eads@18: this.lineCap = "butt";
eads@18: this.miterLimit = Z * 1;
eads@18: this.globalAlpha = 1;
eads@18: this.canvas = surfaceElement;
eads@18:
eads@18: var el = surfaceElement.ownerDocument.createElement('div');
eads@18: el.style.width = surfaceElement.clientWidth + 'px';
eads@18: el.style.height = surfaceElement.clientHeight + 'px';
eads@18: el.style.overflow = 'hidden';
eads@18: el.style.position = 'absolute';
eads@18: surfaceElement.appendChild(el);
eads@18:
eads@18: this.element_ = el;
eads@18: this.arcScaleX_ = 1;
eads@18: this.arcScaleY_ = 1;
eads@18: };
eads@18:
eads@18: var contextPrototype = CanvasRenderingContext2D_.prototype;
eads@18: contextPrototype.clearRect = function() {
eads@18: this.element_.innerHTML = "";
eads@18: this.currentPath_ = [];
eads@18: };
eads@18:
eads@18: contextPrototype.beginPath = function() {
eads@18: // TODO: Branch current matrix so that save/restore has no effect
eads@18: // as per safari docs.
eads@18:
eads@18: this.currentPath_ = [];
eads@18: };
eads@18:
eads@18: contextPrototype.moveTo = function(aX, aY) {
eads@18: this.currentPath_.push({type: "moveTo", x: aX, y: aY});
eads@18: this.currentX_ = aX;
eads@18: this.currentY_ = aY;
eads@18: };
eads@18:
eads@18: contextPrototype.lineTo = function(aX, aY) {
eads@18: this.currentPath_.push({type: "lineTo", x: aX, y: aY});
eads@18: this.currentX_ = aX;
eads@18: this.currentY_ = aY;
eads@18: };
eads@18:
eads@18: contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
eads@18: aCP2x, aCP2y,
eads@18: aX, aY) {
eads@18: this.currentPath_.push({type: "bezierCurveTo",
eads@18: cp1x: aCP1x,
eads@18: cp1y: aCP1y,
eads@18: cp2x: aCP2x,
eads@18: cp2y: aCP2y,
eads@18: x: aX,
eads@18: y: aY});
eads@18: this.currentX_ = aX;
eads@18: this.currentY_ = aY;
eads@18: };
eads@18:
eads@18: contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
eads@18: // the following is lifted almost directly from
eads@18: // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
eads@18: var cp1x = this.currentX_ + 2.0 / 3.0 * (aCPx - this.currentX_);
eads@18: var cp1y = this.currentY_ + 2.0 / 3.0 * (aCPy - this.currentY_);
eads@18: var cp2x = cp1x + (aX - this.currentX_) / 3.0;
eads@18: var cp2y = cp1y + (aY - this.currentY_) / 3.0;
eads@18: this.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, aX, aY);
eads@18: };
eads@18:
eads@18: contextPrototype.arc = function(aX, aY, aRadius,
eads@18: aStartAngle, aEndAngle, aClockwise) {
eads@18: aRadius *= Z;
eads@18: var arcType = aClockwise ? "at" : "wa";
eads@18:
eads@18: var xStart = aX + (mc(aStartAngle) * aRadius) - Z2;
eads@18: var yStart = aY + (ms(aStartAngle) * aRadius) - Z2;
eads@18:
eads@18: var xEnd = aX + (mc(aEndAngle) * aRadius) - Z2;
eads@18: var yEnd = aY + (ms(aEndAngle) * aRadius) - Z2;
eads@18:
eads@18: // IE won't render arches drawn counter clockwise if xStart == xEnd.
eads@18: if (xStart == xEnd && !aClockwise) {
eads@18: xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
eads@18: // that can be represented in binary
eads@18: }
eads@18:
eads@18: this.currentPath_.push({type: arcType,
eads@18: x: aX,
eads@18: y: aY,
eads@18: radius: aRadius,
eads@18: xStart: xStart,
eads@18: yStart: yStart,
eads@18: xEnd: xEnd,
eads@18: yEnd: yEnd});
eads@18:
eads@18: };
eads@18:
eads@18: contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
eads@18: this.moveTo(aX, aY);
eads@18: this.lineTo(aX + aWidth, aY);
eads@18: this.lineTo(aX + aWidth, aY + aHeight);
eads@18: this.lineTo(aX, aY + aHeight);
eads@18: this.closePath();
eads@18: };
eads@18:
eads@18: contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
eads@18: // Will destroy any existing path (same as FF behaviour)
eads@18: this.beginPath();
eads@18: this.moveTo(aX, aY);
eads@18: this.lineTo(aX + aWidth, aY);
eads@18: this.lineTo(aX + aWidth, aY + aHeight);
eads@18: this.lineTo(aX, aY + aHeight);
eads@18: this.closePath();
eads@18: this.stroke();
eads@18: };
eads@18:
eads@18: contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
eads@18: // Will destroy any existing path (same as FF behaviour)
eads@18: this.beginPath();
eads@18: this.moveTo(aX, aY);
eads@18: this.lineTo(aX + aWidth, aY);
eads@18: this.lineTo(aX + aWidth, aY + aHeight);
eads@18: this.lineTo(aX, aY + aHeight);
eads@18: this.closePath();
eads@18: this.fill();
eads@18: };
eads@18:
eads@18: contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
eads@18: var gradient = new CanvasGradient_("gradient");
eads@18: return gradient;
eads@18: };
eads@18:
eads@18: contextPrototype.createRadialGradient = function(aX0, aY0,
eads@18: aR0, aX1,
eads@18: aY1, aR1) {
eads@18: var gradient = new CanvasGradient_("gradientradial");
eads@18: gradient.radius1_ = aR0;
eads@18: gradient.radius2_ = aR1;
eads@18: gradient.focus_.x = aX0;
eads@18: gradient.focus_.y = aY0;
eads@18: return gradient;
eads@18: };
eads@18:
eads@18: contextPrototype.drawImage = function (image, var_args) {
eads@18: var dx, dy, dw, dh, sx, sy, sw, sh;
eads@18:
eads@18: // to find the original width we overide the width and height
eads@18: var oldRuntimeWidth = image.runtimeStyle.width;
eads@18: var oldRuntimeHeight = image.runtimeStyle.height;
eads@18: image.runtimeStyle.width = 'auto';
eads@18: image.runtimeStyle.height = 'auto';
eads@18:
eads@18: // get the original size
eads@18: var w = image.width;
eads@18: var h = image.height;
eads@18:
eads@18: // and remove overides
eads@18: image.runtimeStyle.width = oldRuntimeWidth;
eads@18: image.runtimeStyle.height = oldRuntimeHeight;
eads@18:
eads@18: if (arguments.length == 3) {
eads@18: dx = arguments[1];
eads@18: dy = arguments[2];
eads@18: sx = sy = 0;
eads@18: sw = dw = w;
eads@18: sh = dh = h;
eads@18: } else if (arguments.length == 5) {
eads@18: dx = arguments[1];
eads@18: dy = arguments[2];
eads@18: dw = arguments[3];
eads@18: dh = arguments[4];
eads@18: sx = sy = 0;
eads@18: sw = w;
eads@18: sh = h;
eads@18: } else if (arguments.length == 9) {
eads@18: sx = arguments[1];
eads@18: sy = arguments[2];
eads@18: sw = arguments[3];
eads@18: sh = arguments[4];
eads@18: dx = arguments[5];
eads@18: dy = arguments[6];
eads@18: dw = arguments[7];
eads@18: dh = arguments[8];
eads@18: } else {
eads@18: throw "Invalid number of arguments";
eads@18: }
eads@18:
eads@18: var d = this.getCoords_(dx, dy);
eads@18:
eads@18: var w2 = sw / 2;
eads@18: var h2 = sh / 2;
eads@18:
eads@18: var vmlStr = [];
eads@18:
eads@18: var W = 10;
eads@18: var H = 10;
eads@18:
eads@18: // For some reason that I've now forgotten, using divs didn't work
eads@18: vmlStr.push(' ' ,
eads@18: '',
eads@18: '');
eads@18:
eads@18: this.element_.insertAdjacentHTML("BeforeEnd",
eads@18: vmlStr.join(""));
eads@18: };
eads@18:
eads@18: contextPrototype.stroke = function(aFill) {
eads@18: var lineStr = [];
eads@18: var lineOpen = false;
eads@18: var a = processStyle(aFill ? this.fillStyle : this.strokeStyle);
eads@18: var color = a[0];
eads@18: var opacity = a[1] * this.globalAlpha;
eads@18:
eads@18: var W = 10;
eads@18: var H = 10;
eads@18:
eads@18: lineStr.push(' max.x) {
eads@18: max.x = c.x;
eads@18: }
eads@18: if (min.y == null || c.y < min.y) {
eads@18: min.y = c.y;
eads@18: }
eads@18: if (max.y == null || c.y > max.y) {
eads@18: max.y = c.y;
eads@18: }
eads@18: }
eads@18: }
eads@18: lineStr.push(' ">');
eads@18:
eads@18: if (typeof this.fillStyle == "object") {
eads@18: var focus = {x: "50%", y: "50%"};
eads@18: var width = (max.x - min.x);
eads@18: var height = (max.y - min.y);
eads@18: var dimension = (width > height) ? width : height;
eads@18:
eads@18: focus.x = mr((this.fillStyle.focus_.x / width) * 100 + 50) + "%";
eads@18: focus.y = mr((this.fillStyle.focus_.y / height) * 100 + 50) + "%";
eads@18:
eads@18: var colors = [];
eads@18:
eads@18: // inside radius (%)
eads@18: if (this.fillStyle.type_ == "gradientradial") {
eads@18: var inside = (this.fillStyle.radius1_ / dimension * 100);
eads@18:
eads@18: // percentage that outside radius exceeds inside radius
eads@18: var expansion = (this.fillStyle.radius2_ / dimension * 100) - inside;
eads@18: } else {
eads@18: var inside = 0;
eads@18: var expansion = 100;
eads@18: }
eads@18:
eads@18: var insidecolor = {offset: null, color: null};
eads@18: var outsidecolor = {offset: null, color: null};
eads@18:
eads@18: // We need to sort 'colors' by percentage, from 0 > 100 otherwise ie
eads@18: // won't interpret it correctly
eads@18: this.fillStyle.colors_.sort(function (cs1, cs2) {
eads@18: return cs1.offset - cs2.offset;
eads@18: });
eads@18:
eads@18: for (var i = 0; i < this.fillStyle.colors_.length; i++) {
eads@18: var fs = this.fillStyle.colors_[i];
eads@18:
eads@18: colors.push( (fs.offset * expansion) + inside, "% ", fs.color, ",");
eads@18:
eads@18: if (fs.offset > insidecolor.offset || insidecolor.offset == null) {
eads@18: insidecolor.offset = fs.offset;
eads@18: insidecolor.color = fs.color;
eads@18: }
eads@18:
eads@18: if (fs.offset < outsidecolor.offset || outsidecolor.offset == null) {
eads@18: outsidecolor.offset = fs.offset;
eads@18: outsidecolor.color = fs.color;
eads@18: }
eads@18: }
eads@18: colors.pop();
eads@18:
eads@18: lineStr.push('');
eads@18: } else if (aFill) {
eads@18: lineStr.push('');
eads@18: } else {
eads@18: lineStr.push(
eads@18: ''
eads@18: );
eads@18: }
eads@18:
eads@18: lineStr.push("");
eads@18:
eads@18: this.element_.insertAdjacentHTML("beforeEnd", lineStr.join(""));
eads@18:
eads@18: this.currentPath_ = [];
eads@18: };
eads@18:
eads@18: contextPrototype.fill = function() {
eads@18: this.stroke(true);
eads@18: }
eads@18:
eads@18: contextPrototype.closePath = function() {
eads@18: this.currentPath_.push({type: "close"});
eads@18: };
eads@18:
eads@18: /**
eads@18: * @private
eads@18: */
eads@18: contextPrototype.getCoords_ = function(aX, aY) {
eads@18: return {
eads@18: x: Z * (aX * this.m_[0][0] + aY * this.m_[1][0] + this.m_[2][0]) - Z2,
eads@18: y: Z * (aX * this.m_[0][1] + aY * this.m_[1][1] + this.m_[2][1]) - Z2
eads@18: }
eads@18: };
eads@18:
eads@18: contextPrototype.save = function() {
eads@18: var o = {};
eads@18: copyState(this, o);
eads@18: this.aStack_.push(o);
eads@18: this.mStack_.push(this.m_);
eads@18: this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
eads@18: };
eads@18:
eads@18: contextPrototype.restore = function() {
eads@18: copyState(this.aStack_.pop(), this);
eads@18: this.m_ = this.mStack_.pop();
eads@18: };
eads@18:
eads@18: contextPrototype.translate = function(aX, aY) {
eads@18: var m1 = [
eads@18: [1, 0, 0],
eads@18: [0, 1, 0],
eads@18: [aX, aY, 1]
eads@18: ];
eads@18:
eads@18: this.m_ = matrixMultiply(m1, this.m_);
eads@18: };
eads@18:
eads@18: contextPrototype.rotate = function(aRot) {
eads@18: var c = mc(aRot);
eads@18: var s = ms(aRot);
eads@18:
eads@18: var m1 = [
eads@18: [c, s, 0],
eads@18: [-s, c, 0],
eads@18: [0, 0, 1]
eads@18: ];
eads@18:
eads@18: this.m_ = matrixMultiply(m1, this.m_);
eads@18: };
eads@18:
eads@18: contextPrototype.scale = function(aX, aY) {
eads@18: this.arcScaleX_ *= aX;
eads@18: this.arcScaleY_ *= aY;
eads@18: var m1 = [
eads@18: [aX, 0, 0],
eads@18: [0, aY, 0],
eads@18: [0, 0, 1]
eads@18: ];
eads@18:
eads@18: this.m_ = matrixMultiply(m1, this.m_);
eads@18: };
eads@18:
eads@18: /******** STUBS ********/
eads@18: contextPrototype.clip = function() {
eads@18: // TODO: Implement
eads@18: };
eads@18:
eads@18: contextPrototype.arcTo = function() {
eads@18: // TODO: Implement
eads@18: };
eads@18:
eads@18: contextPrototype.createPattern = function() {
eads@18: return new CanvasPattern_;
eads@18: };
eads@18:
eads@18: // Gradient / Pattern Stubs
eads@18: function CanvasGradient_(aType) {
eads@18: this.type_ = aType;
eads@18: this.radius1_ = 0;
eads@18: this.radius2_ = 0;
eads@18: this.colors_ = [];
eads@18: this.focus_ = {x: 0, y: 0};
eads@18: }
eads@18:
eads@18: CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
eads@18: aColor = processStyle(aColor);
eads@18: this.colors_.push({offset: 1-aOffset, color: aColor});
eads@18: };
eads@18:
eads@18: function CanvasPattern_() {}
eads@18:
eads@18: // set up externs
eads@18: G_vmlCanvasManager = G_vmlCanvasManager_;
eads@18: CanvasRenderingContext2D = CanvasRenderingContext2D_;
eads@18: CanvasGradient = CanvasGradient_;
eads@18: CanvasPattern = CanvasPattern_;
eads@18:
eads@18: })();
eads@18:
eads@18: } // if