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(' <g_vml_:group',
eads@18:                 ' coordsize="', Z * W, ',', Z * H, '"',
eads@18:                 ' coordorigin="0,0"' ,
eads@18:                 ' style="width:', W, ';height:', H, ';position:absolute;');
eads@18: 
eads@18:     // If filters are necessary (rotation exists), create them
eads@18:     // filters are bog-slow, so only create them if abbsolutely necessary
eads@18:     // The following check doesn't account for skews (which don't exist
eads@18:     // in the canvas spec (yet) anyway.
eads@18: 
eads@18:     if (this.m_[0][0] != 1 || this.m_[0][1]) {
eads@18:       var filter = [];
eads@18: 
eads@18:       // Note the 12/21 reversal
eads@18:       filter.push("M11='", this.m_[0][0], "',",
eads@18:                   "M12='", this.m_[1][0], "',",
eads@18:                   "M21='", this.m_[0][1], "',",
eads@18:                   "M22='", this.m_[1][1], "',",
eads@18:                   "Dx='", mr(d.x / Z), "',",
eads@18:                   "Dy='", mr(d.y / Z), "'");
eads@18: 
eads@18:       // Bounding box calculation (need to minimize displayed area so that
eads@18:       // filters don't waste time on unused pixels.
eads@18:       var max = d;
eads@18:       var c2 = this.getCoords_(dx + dw, dy);
eads@18:       var c3 = this.getCoords_(dx, dy + dh);
eads@18:       var c4 = this.getCoords_(dx + dw, dy + dh);
eads@18: 
eads@18:       max.x = Math.max(max.x, c2.x, c3.x, c4.x);
eads@18:       max.y = Math.max(max.y, c2.y, c3.y, c4.y);
eads@18: 
eads@18:       vmlStr.push("padding:0 ", mr(max.x / Z), "px ", mr(max.y / Z),
eads@18:                   "px 0;filter:progid:DXImageTransform.Microsoft.Matrix(",
eads@18:                   filter.join(""), ", sizingmethod='clip');")
eads@18:     } else {
eads@18:       vmlStr.push("top:", mr(d.y / Z), "px;left:", mr(d.x / Z), "px;")
eads@18:     }
eads@18: 
eads@18:     vmlStr.push(' ">' ,
eads@18:                 '<g_vml_:image src="', image.src, '"',
eads@18:                 ' style="width:', Z * dw, ';',
eads@18:                 ' height:', Z * dh, ';"',
eads@18:                 ' cropleft="', sx / w, '"',
eads@18:                 ' croptop="', sy / h, '"',
eads@18:                 ' cropright="', (w - sx - sw) / w, '"',
eads@18:                 ' cropbottom="', (h - sy - sh) / h, '"',
eads@18:                 ' />',
eads@18:                 '</g_vml_:group>');
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('<g_vml_:shape',
eads@18:                  ' fillcolor="', color, '"',
eads@18:                  ' filled="', Boolean(aFill), '"',
eads@18:                  ' style="position:absolute;width:', W, ';height:', H, ';"',
eads@18:                  ' coordorigin="0 0" coordsize="', Z * W, ' ', Z * H, '"',
eads@18:                  ' stroked="', !aFill, '"',
eads@18:                  ' strokeweight="', this.lineWidth, '"',
eads@18:                  ' strokecolor="', color, '"',
eads@18:                  ' path="');
eads@18: 
eads@18:     var newSeq = false;
eads@18:     var min = {x: null, y: null};
eads@18:     var max = {x: null, y: null};
eads@18: 
eads@18:     for (var i = 0; i < this.currentPath_.length; i++) {
eads@18:       var p = this.currentPath_[i];
eads@18: 
eads@18:       if (p.type == "moveTo") {
eads@18:         lineStr.push(" m ");
eads@18:         var c = this.getCoords_(p.x, p.y);
eads@18:         lineStr.push(mr(c.x), ",", mr(c.y));
eads@18:       } else if (p.type == "lineTo") {
eads@18:         lineStr.push(" l ");
eads@18:         var c = this.getCoords_(p.x, p.y);
eads@18:         lineStr.push(mr(c.x), ",", mr(c.y));
eads@18:       } else if (p.type == "close") {
eads@18:         lineStr.push(" x ");
eads@18:       } else if (p.type == "bezierCurveTo") {
eads@18:         lineStr.push(" c ");
eads@18:         var c = this.getCoords_(p.x, p.y);
eads@18:         var c1 = this.getCoords_(p.cp1x, p.cp1y);
eads@18:         var c2 = this.getCoords_(p.cp2x, p.cp2y);
eads@18:         lineStr.push(mr(c1.x), ",", mr(c1.y), ",",
eads@18:                      mr(c2.x), ",", mr(c2.y), ",",
eads@18:                      mr(c.x), ",", mr(c.y));
eads@18:       } else if (p.type == "at" || p.type == "wa") {
eads@18:         lineStr.push(" ", p.type, " ");
eads@18:         var c  = this.getCoords_(p.x, p.y);
eads@18:         var cStart = this.getCoords_(p.xStart, p.yStart);
eads@18:         var cEnd = this.getCoords_(p.xEnd, p.yEnd);
eads@18: 
eads@18:         lineStr.push(mr(c.x - this.arcScaleX_ * p.radius), ",",
eads@18:                      mr(c.y - this.arcScaleY_ * p.radius), " ",
eads@18:                      mr(c.x + this.arcScaleX_ * p.radius), ",",
eads@18:                      mr(c.y + this.arcScaleY_ * p.radius), " ",
eads@18:                      mr(cStart.x), ",", mr(cStart.y), " ",
eads@18:                      mr(cEnd.x), ",", mr(cEnd.y));
eads@18:       }
eads@18: 
eads@18: 
eads@18:       // TODO: Following is broken for curves due to
eads@18:       //       move to proper paths.
eads@18: 
eads@18:       // Figure out dimensions so we can do gradient fills
eads@18:       // properly
eads@18:       if(c) {
eads@18:         if (min.x == null || c.x < min.x) {
eads@18:           min.x = c.x;
eads@18:         }
eads@18:         if (max.x == null || c.x > 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('<g_vml_:fill',
eads@18:                    ' color="', outsidecolor.color, '"',
eads@18:                    ' color2="', insidecolor.color, '"',
eads@18:                    ' type="', this.fillStyle.type_, '"',
eads@18:                    ' focusposition="', focus.x, ', ', focus.y, '"',
eads@18:                    ' colors="', colors.join(""), '"',
eads@18:                    ' opacity="', opacity, '" />');
eads@18:     } else if (aFill) {
eads@18:       lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity, '" />');
eads@18:     } else {
eads@18:       lineStr.push(
eads@18:         '<g_vml_:stroke',
eads@18:         ' opacity="', opacity,'"',
eads@18:         ' joinstyle="', this.lineJoin, '"',
eads@18:         ' miterlimit="', this.miterLimit, '"',
eads@18:         ' endcap="', processLineCap(this.lineCap) ,'"',
eads@18:         ' weight="', this.lineWidth, 'px"',
eads@18:         ' color="', color,'" />'
eads@18:       );
eads@18:     }
eads@18: 
eads@18:     lineStr.push("</g_vml_:shape>");
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