http://itstarcom.net/main/js/canvg.js

1/*
2 * canvg.js - Javascript SVG parser and renderer on Canvas
3 * MIT Licensed 
4 * Gabe Lerner ([email protected])
5 * http://code.google.com/p/canvg/
6 *
7 * Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
8 */
9(function(){
10	// canvg(target, s)
11	// empty parameters: replace all 'svg' elements on page with 'canvas' elements
12	// target: canvas element or the id of a canvas element
13	// s: svg string, url to svg file, or xml document
14	// opts: optional hash of options
15	//		 ignoreMouse: true => ignore mouse events
16	//		 ignoreAnimation: true => ignore animations
17	//		 ignoreDimensions: true => does not try to resize canvas
18	//		 ignoreClear: true => does not clear canvas
19	//		 offsetX: int => draws at a x offset
20	//		 offsetY: int => draws at a y offset
21	//		 scaleWidth: int => scales horizontally to width
22	//		 scaleHeight: int => scales vertically to height
23	//		 renderCallback: function => will call the function after the first render is completed
24	//		 forceRedraw: function => will call the function on every frame, if it returns true, will redraw
25	this.canvg = function (target, s, opts) {
26		// no parameters
27		if (target == null && s == null && opts == null) {
28			var svgTags = document.getElementsByTagName('svg');
29			for (var i=0; i<svgTags.length; i++) {
30				var svgTag = svgTags[i];
31				var c = document.createElement('canvas');
32				c.width = svgTag.clientWidth;
33				c.height = svgTag.clientHeight;
34				svgTag.parentNode.insertBefore(c, svgTag);
35				svgTag.parentNode.removeChild(svgTag);
36				var div = document.createElement('div');
37				div.appendChild(svgTag);
38				canvg(c, div.innerHTML);
39			}
40			return;
41		}	
42		opts = opts || {};
43	
44		if (typeof target == 'string') {
45			target = document.getElementById(target);
46		}
47		
48		// store class on canvas
49		if (target.svg != null) target.svg.stop();
50		var svg = build();
51		// on i.e. 8 for flash canvas, we can't assign the property so check for it
52		if (!(target.childNodes.length == 1 && target.childNodes[0].nodeName == 'OBJECT')) target.svg = svg;
53		svg.opts = opts;
54		
55		var ctx = target.getContext('2d');
56		if (typeof(s.documentElement) != 'undefined') {
57			// load from xml doc
58			svg.loadXmlDoc(ctx, s);
59		}
60		else if (s.substr(0,1) == '<') {
61			// load from xml string
62			svg.loadXml(ctx, s);
63		}
64		else {
65			// load from url
66			svg.load(ctx, s);
67		}
68	}
69
70	function build() {
71		var svg = { };
72		
73		svg.FRAMERATE = 30;
74		svg.MAX_VIRTUAL_PIXELS = 30000;
75		
76		// globals
77		svg.init = function(ctx) {
78			var uniqueId = 0;
79			svg.UniqueId = function () { uniqueId++; return 'canvg' + uniqueId;	};
80			svg.Definitions = {};
81			svg.Styles = {};
82			svg.Animations = [];
83			svg.Images = [];
84			svg.ctx = ctx;
85			svg.ViewPort = new (function () {
86				this.viewPorts = [];
87				this.Clear = function() { this.viewPorts = []; }
88				this.SetCurrent = function(width, height) { this.viewPorts.push({ width: width, height: height }); }
89				this.RemoveCurrent = function() { this.viewPorts.pop(); }
90				this.Current = function() { return this.viewPorts[this.viewPorts.length - 1]; }
91				this.width = function() { return this.Current().width; }
92				this.height = function() { return this.Current().height; }
93				this.ComputeSize = function(d) {
94					if (d != null && typeof(d) == 'number') return d;
95					if (d == 'x') return this.width();
96					if (d == 'y') return this.height();
97					return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);			
98				}
99			});
100		}
101		svg.init();
102		
103		// images loaded
104		svg.ImagesLoaded = function() { 
105			for (var i=0; i<svg.Images.length; i++) {
106				if (!svg.Images[i].loaded) return false;
107			}
108			return true;
109		}
110
111		// trim
112		svg.trim = function(s) { return s.replace(/^\s+|\s+$/g, ''); }
113		
114		// compress spaces
115		svg.compressSpaces = function(s) { return s.replace(/[\s\r\t\n]+/gm,' '); }
116		
117		// ajax
118		svg.ajax = function(url) {
119			var AJAX;
120			if(window.XMLHttpRequest){AJAX=new XMLHttpRequest();}
121			else{AJAX=new ActiveXObject('Microsoft.XMLHTTP');}

122			if(AJAX){
123			   AJAX.open('GET',url,false);
124			   AJAX.send(null);
125			   return AJAX.responseText;
126			}
127			return null;
128		} 
129		
130		// parse xml
131		svg.parseXml = function(xml) {
132			if (window.DOMParser)
133			{
134				var parser = new DOMParser();
135				return parser.parseFromString(xml, 'text/xml');
136			}
137			else 
138			{
139				xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
140				var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
141				xmlDoc.async = 'false';
142				xmlDoc.loadXML(xml); 
143				return xmlDoc;
144			}		
145		}
146		
147		svg.Property = function(name, value) {
148			this.name = name;
149			this.value = value;
150		}	
151			svg.Property.prototype.getValue = function() {
152				return this.value;
153			}
154		
155			svg.Property.prototype.hasValue = function() {
156				return (this.value != null && this.value !== '');
157			}
158							
159			// return the numerical value of the property
160			svg.Property.prototype.numValue = function() {
161				if (!this.hasValue()) return 0;
162				
163				var n = parseFloat(this.value);
164				if ((this.value + '').match(/%$/)) {
165					n = n / 100.0;
166				}
167				return n;
168			}
169			
170			svg.Property.prototype.valueOrDefault = function(def) {
171				if (this.hasValue()) return this.value;
172				return def;
173			}
174			
175			svg.Property.prototype.numValueOrDefault = function(def) {
176				if (this.hasValue()) return this.numValue();
177				return def;
178			}
179			
180			// color extensions
181				// augment the current color value with the opacity
182				svg.Property.prototype.addOpacity = function(opacity) {
183					var newValue = this.value;
184					if (opacity != null && opacity != '' && typeof(this.value)=='string') { // can only add opacity to colors, not patterns
185						var color = new RGBColor(this.value);
186						if (color.ok) {
187							newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacity + ')';
188						}
189					}
190					return new svg.Property(this.name, newValue);
191				}
192			
193			// definition extensions
194				// get the definition from the definitions table
195				svg.Property.prototype.getDefinition = function() {
196					var name = this.value.match(/#([^\)'"]+)/);
197					if (name) { name = name[1]; }
198					if (!name) { name = this.value; }
199					return svg.Definitions[name];
200				}
201				
202				svg.Property.prototype.isUrlDefinition = function() {

203					return this.value.indexOf('url(') == 0
204				}
205				
206				svg.Property.prototype.getFillStyleDefinition = function(e, opacityProp) {
207					var def = this.getDefinition();
208					
209					// gradient
210					if (def != null && def.createGradient) {
211						return def.createGradient(svg.ctx, e, opacityProp);
212					}
213					
214					// pattern
215					if (def != null && def.createPattern) {
216						if (def.getHrefAttribute().hasValue()) {
217							var pt = def.attribute('patternTransform');
218							def = def.getHrefAttribute().getDefinition();
219							if (pt.hasValue()) { def.attribute('patternTransform', true).value = pt.value; }
220						}
221						return def.createPattern(svg.ctx, e);
222					}
223					
224					return null;
225				}
226			
227			// length extensions
228				svg.Property.prototype.getDPI = function(viewPort) {
229					return 96.0; // TODO: compute?
230				}
231				
232				svg.Property.prototype.getEM = function(viewPort) {
233					var em = 12;
234					
235					var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
236					if (fontSize.hasValue()) em = fontSize.toPixels(viewPort);
237					
238					return em;
239				}
240				
241				svg.Property.prototype.getUnits = function() {
242					var s = this.value+'';
243					return s.replace(/[0-9\.\-]/g,'');
244				}
245			
246				// get the length as pixels
247				svg.Property.prototype.toPixels = function(viewPort, processPercent) {
248					if (!this.hasValue()) return 0;
249					var s = this.value+'';
250					if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort);
251					if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0;
252					if (s.match(/px$/)) return this.numValue();
253					if (s.match(/pt$/)) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0);
254					if (s.match(/pc$/)) return this.numValue() * 15;
255					if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54;
256					if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4;
257					if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort);
258					if (s.match(/%$/)) return this.numValue() * svg.ViewPort.ComputeSize(viewPort);
259					var n = this.numValue();
260					if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort);
261					return n;
262				}
263
264			// time extensions
265				// get the time as milliseconds
266				svg.Property.prototype.toMilliseconds = function() {
267					if (!this.hasValue()) return 0;
268					var s = this.value+'';
269					if (s.match(/s$/)) return this.numValue() * 1000;
270					if (s.match(/ms$/)) return this.numValue();
271					return this.numValue();
272				}
273			
274			// angle extensions
275				// get the angle as radians
276				svg.Property.prototype.toRadians = function() {
277					if (!this.hasValue()) return 0;
278					var s = this.value+'';
279					if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0);
280					if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0);
281					if (s.match(/rad$/)) return this.numValue();
282					return this.numValue() * (Math.PI / 180.0);
283				}
284		
285		// fonts
286		svg.Font = new (function() {
287			this.Styles = 'normal|italic|oblique|inherit';
288			this.Variants = 'normal|small-caps|inherit';
289			this.Weights = 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit';
290			
291			this.CreateFont = function(fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) { 
292				var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
293				return { 
294					fontFamily: fontFamily || f.fontFamily, 
295					fontSize: fontSize || f.fontSize, 
296					fontStyle: fontStyle || f.fontStyle, 
297					fontWeight: fontWeight || f.fontWeight, 
298					fontVariant: fontVariant || f.fontVariant,
299					toString: function () { return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ') } 
300				} 
301			}
302			
303			var that = this;
304			this.Parse = function(s) {
305				var f = {};
306				var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
307				var set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false }
308				var ff = '';
309				for (var i=0; i<d.length; i++) {
310					if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontStyle = d[i]; set.fontStyle = true; }
311					else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontVariant = d[i]; set.fontStyle = set.fontVariant = true;	}
312					else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) {	if (d[i] != 'inherit') f.fontWeight = d[i]; set.fontStyle = set.fontVariant = set.fontWeight = true; }
313					else if (!set.fontSize) { if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0]; set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true; }
314					else { if (d[i] != 'inherit') ff += d[i]; }
315				} if (ff != '') f.fontFamily = ff;
316				return f;
317			}
318		});
319		
320		// points and paths
321		svg.ToNumberArray = function(s) {
322			var a = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' ');
323			for (var i=0; i<a.length; i++) {
324				a[i] = parseFloat(a[i]);
325			}
326			return a;
327		}		
328		svg.Point = function(x, y) {
329			this.x = x;
330			this.y = y;
331		}	
332			svg.Point.prototype.angleTo = function(p) {
333				return Math.atan2(p.y - this.y, p.x - this.x);
334			}
335			
336			svg.Point.prototype.applyTransform = function(v) {
337				var xp = this.x * v[0] + this.y * v[2] + v[4];
338				var yp = this.x * v[1] + this.y * v[3] + v[5];
339				this.x = xp;
340				this.y = yp;
341			}
342
343		svg.CreatePoint = function(s) {
344			var a = svg.ToNumberArray(s);

345			return new svg.Point(a[0], a[1]);
346		}
347		svg.CreatePath = function(s) {
348			var a = svg.ToNumberArray(s);
349			var path = [];
350			for (var i=0; i<a.length; i+=2) {
351				path.push(new svg.Point(a[i], a[i+1]));
352			}
353			return path;
354		}
355		
356		// bounding box
357		svg.BoundingBox = function(x1, y1, x2, y2) { // pass in initial points if you want
358			this.x1 = Number.NaN;
359			this.y1 = Number.NaN;
360			this.x2 = Number.NaN;
361			this.y2 = Number.NaN;
362			
363			this.x = function() { return this.x1; }
364			this.y = function() { return this.y1; }
365			this.width = function() { return this.x2 - this.x1; }
366			this.height = function() { return this.y2 - this.y1; }
367			
368			this.addPoint = function(x, y) {	
369				if (x != null) {
370					if (isNaN(this.x1) || isNaN(this.x2)) {
371						this.x1 = x;
372						this.x2 = x;
373					}
374					if (x < this.x1) this.x1 = x;
375					if (x > this.x2) this.x2 = x;
376				}
377			
378				if (y != null) {
379					if (isNaN(this.y1) || isNaN(this.y2)) {
380						this.y1 = y;
381						this.y2 = y;
382					}
383					if (y < this.y1) this.y1 = y;
384					if (y > this.y2) this.y2 = y;
385				}
386			}			
387			this.addX = function(x) { this.addPoint(x, null); }
388			this.addY = function(y) { this.addPoint(null, y); }
389			
390			this.addBoundingBox = function(bb) {
391				this.addPoint(bb.x1, bb.y1);
392				this.addPoint(bb.x2, bb.y2);
393			}
394			
395			this.addQuadraticCurve = function(p0x, p0y, p1x, p1y, p2x, p2y) {
396				var cp1x = p0x + 2/3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
397				var cp1y = p0y + 2/3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
398				var cp2x = cp1x + 1/3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
399				var cp2y = cp1y + 1/3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
400				this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y,	cp2y, p2x, p2y);
401			}
402			
403			this.addBezierCurve = function(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
404				// from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
405				var p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y];
406				this.addPoint(p0[0], p0[1]);
407				this.addPoint(p3[0], p3[1]);
408				
409				for (i=0; i<=1; i++) {
410					var f = function(t) { 
411						return Math.pow(1-t, 3) * p0[i]
412						+ 3 * Math.pow(1-t, 2) * t * p1[i]
413						+ 3 * (1-t) * Math.pow(t, 2) * p2[i]
414						+ Math.pow(t, 3) * p3[i];
415					}
416					
417					var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
418					var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
419					var c = 3 * p1[i] - 3 * p0[i];
420					
421					if (a == 0) {
422						if (b == 0) continue;
423						var t = -c / b;
424						if (0 < t && t < 1) {
425							if (i == 0) this.addX(f(t));
426							if (i == 1) this.addY(f(t));
427						}
428						continue;
429					}
430					
431					var b2ac = Math.pow(b, 2) - 4 * c * a;
432					if (b2ac < 0) continue;
433					var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
434					if (0 < t1 && t1 < 1) {
435						if (i == 0) this.addX(f(t1));
436						if (i == 1) this.addY(f(t1));
437					}
438					var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
439					if (0 < t2 && t2 < 1) {
440						if (i == 0) this.addX(f(t2));
441						if (i == 1) this.addY(f(t2));
442					}
443				}
444			}
445			
446			this.isPointInBox = function(x, y) {
447				return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2);
448			}
449			
450			this.addPoint(x1, y1);
451			this.addPoint(x2, y2);
452		}
453		
454		// transforms
455		svg.Transform = function(v) {	
456			var that = this;
457			this.Type = {}
458		
459			// translate
460			this.Type.translate = function(s) {
461				this.p = svg.CreatePoint(s);			
462				this.apply = function(ctx) {
463					ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
464				}
465				this.unapply = function(ctx) {
466					ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0);
467				}
468				this.applyToPoint = function(p) {
469					p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
470				}
471			}
472			
473			// rotate
474			this.Type.rotate = function(s) {
475				var a = svg.ToNumberArray(s);
476				this.angle = new svg.Property('angle', a[0]);
477				this.cx = a[1] || 0;
478				this.cy = a[2] || 0;
479				this.apply = function(ctx) {
480					ctx.translate(this.cx, this.cy);
481					ctx.rotate(this.angle.toRadians());
482					ctx.translate(-this.cx, -this.cy);
483				}
484				this.unapply = function(ctx) {
485					ctx.translate(this.cx, this.cy);
486					ctx.rotate(-1.0 * this.angle.toRadians());
487					ctx.translate(-this.cx, -this.cy);
488				}
489				this.applyToPoint = function(p) {
490					var a = this.angle.toRadians();
491					p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
492					p.applyTransform([Math.cos(a), Math.sin(a), -Math.sin(a), Math.cos(a), 0, 0]);
493					p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]);
494				}			
495			}
496			
497			this.Type.scale = function(s) {
498				this.p = svg.CreatePoint(s);
499				this.apply = function(ctx) {
500					ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
501				}
502				this.unapply = function(ctx) {
503					ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0);
504				}
505				this.applyToPoint = function(p) {
506					p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]);
507				}				
508			}
509			
510			this.Type.matrix = function(s) {
511				this.m = svg.ToNumberArray(s);

512				this.apply = function(ctx) {
513					ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
514				}
515				this.applyToPoint = function(p) {
516					p.applyTransform(this.m);
517				}					
518			}
519			
520			this.Type.SkewBase = function(s) {
521				this.base = that.Type.matrix;
522				this.base(s);
523				this.angle = new svg.Property('angle', s);
524			}
525			this.Type.SkewBase.prototype = new this.Type.matrix;
526			
527			this.Type.skewX = function(s) {
528				this.base = that.Type.SkewBase;
529				this.base(s);
530				this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0];
531			}
532			this.Type.skewX.prototype = new this.Type.SkewBase;
533			
534			this.Type.skewY = function(s) {
535				this.base = that.Type.SkewBase;
536				this.base(s);
537				this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0];
538			}
539			this.Type.skewY.prototype = new this.Type.SkewBase;
540		
541			this.transforms = [];
542			
543			this.apply = function(ctx) {
544				for (var i=0; i<this.transforms.length; i++) {
545					this.transforms[i].apply(ctx);
546				}
547			}
548			
549			this.unapply = function(ctx) {
550				for (var i=this.transforms.length-1; i>=0; i--) {
551					this.transforms[i].unapply(ctx);
552				}
553			}
554			
555			this.applyToPoint = function(p) {
556				for (var i=0; i<this.transforms.length; i++) {
557					this.transforms[i].applyToPoint(p);
558				}
559			}
560			
561			var data = svg.trim(svg.compressSpaces(v)).replace(/\)(\s?,\s?)/g,') ').split(/\s(?=[a-z])/);
562			for (var i=0; i<data.length; i++) {
563				var type = svg.trim(data[i].split('(')[0]);
564				var s = data[i].split('(')[1].replace(')','');
565				var transform = new this.Type[type](s);
566				transform.type = type;
567				this.transforms.push(transform);
568			}
569		}
570		
571		// aspect ratio
572		svg.AspectRatio = function(ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
573			// aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
574			aspectRatio = svg.compressSpaces(aspectRatio);
575			aspectRatio = aspectRatio.replace(/^defer\s/,''); // ignore defer
576			var align = aspectRatio.split(' ')[0] || 'xMidYMid';
577			var meetOrSlice = aspectRatio.split(' ')[1] || 'meet';					
578	
579			// calculate scale
580			var scaleX = width / desiredWidth;
581			var scaleY = height / desiredHeight;
582			var scaleMin = Math.min(scaleX, scaleY);
583			var scaleMax = Math.max(scaleX, scaleY);
584			if (meetOrSlice == 'meet') { desiredWidth *= scaleMin; desiredHeight *= scaleMin; }
585			if (meetOrSlice == 'slice') { desiredWidth *= scaleMax; desiredHeight *= scaleMax; }	
586			
587			refX = new svg.Property('refX', refX);
588			refY = new svg.Property('refY', refY);
589			if (refX.hasValue() && refY.hasValue()) {				
590				ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y'));
591			} 
592			else {					
593				// align
594				if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0); 
595				if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0); 
596				if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width - desiredWidth, 0); 
597				if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height - desiredHeight); 
598			}
599			
600			// scale
601			if (align == 'none') ctx.scale(scaleX, scaleY);
602			else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin); 
603			else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax); 	
604			
605			// translate
606			ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);			
607		}
608		
609		// elements
610		svg.Element = {}
611		
612		svg.EmptyProperty = new svg.Property('EMPTY', '');
613		
614		svg.Element.ElementBase = function(node) {	
615			this.attributes = {};
616			this.styles = {};
617			this.children = [];
618			
619			// get or create attribute
620			this.attribute = function(name, createIfNotExists) {
621				var a = this.attributes[name];
622				if (a != null) return a;
623							
624				if (createIfNotExists == true) { a = new svg.Property(name, ''); this.attributes[name] = a; }
625				return a || svg.EmptyProperty;
626			}
627			
628			this.getHrefAttribute = function() {
629				for (var a in this.attributes) { 
630					if (a.match(/:href$/)) { 
631						return this.attributes[a]; 
632					} 
633				}
634				return svg.EmptyProperty;
635			}
636			
637			// get or create style, crawls up node tree
638			this.style = function(name, createIfNotExists) {
639				var s = this.styles[name];
640				if (s != null) return s;
641				
642				var a = this.attribute(name);
643				if (a != null && a.hasValue()) {
644					this.styles[name] = a; // move up to me to cache
645					return a;
646				}
647				
648				var p = this.parent;
649				if (p != null) {
650					var ps = p.style(name);
651					if (ps != null && ps.hasValue()) {
652						return ps;
653					}
654				}
655					
656				if (createIfNotExists == true) { s = new svg.Property(name, ''); this.styles[name] = s; }
657				return s || svg.EmptyProperty;
658			}
659			
660			// base render
661			this.render = function(ctx) {
662				// don't render display=none
663				if (this.style('display').value == 'none') return;
664				
665				// don't render visibility=hidden
666				if (this.attribute('visibility').value == 'hidden') return;
667			
668				ctx.save();
669				if (this.attribute('mask').hasValue()) { // mask
670					var mask = this.attribute('mask').getDefinition();
671					if (mask != null) mask.apply(ctx, this);
672				}
673				else if (this.style('filter').hasValue()) { // filter
674					var filter = this.style('filter').getDefinition();
675					if (filter != null) filter.apply(ctx, this);
676				}
677				else {	
678					this.setContext(ctx);
679					this.renderChildren(ctx);	
680					this.clearContext(ctx);							
681				}

682				ctx.restore();
683			}
684			
685			// base set context
686			this.setContext = function(ctx) {
687				// OVERRIDE ME!
688			}
689			
690			// base clear context
691			this.clearContext = function(ctx) {
692				// OVERRIDE ME!
693			}			
694			
695			// base render children
696			this.renderChildren = function(ctx) {
697				for (var i=0; i<this.children.length; i++) {
698					this.children[i].render(ctx);
699				}
700			}
701			
702			this.addChild = function(childNode, create) {
703				var child = childNode;
704				if (create) child = svg.CreateElement(childNode);
705				child.parent = this;
706				this.children.push(child);			
707			}
708				
709			if (node != null && node.nodeType == 1) { //ELEMENT_NODE
710				// add children
711				for (var i=0; i<node.childNodes.length; i++) {
712					var childNode = node.childNodes[i];
713					if (childNode.nodeType == 1) this.addChild(childNode, true); //ELEMENT_NODE
714					if (this.captureTextNodes && childNode.nodeType == 3) {
715						var text = childNode.nodeValue || childNode.text || '';
716						if (svg.trim(svg.compressSpaces(text)) != '') {
717							this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE
718						}
719					}
720				}
721				
722				// add attributes
723				for (var i=0; i<node.attributes.length; i++) {
724					var attribute = node.attributes[i];
725					//this.attributes[attribute.nodeName] = new svg.Property(attribute.nodeName, attribute.nodeValue);
726                    this.attributes[attribute.nodeName] = new svg.Property(attribute.nodeName, attribute.value); //***
727				}
728										
729				// add tag styles
730				var styles = svg.Styles[node.nodeName];
731				if (styles != null) {
732					for (var name in styles) {
733						this.styles[name] = styles[name];
734					}
735				}					
736				
737				// add class styles
738				if (this.attribute('class').hasValue()) {
739					var classes = svg.compressSpaces(this.attribute('class').value).split(' ');
740					for (var j=0; j<classes.length; j++) {
741						styles = svg.Styles['.'+classes[j]];
742						if (styles != null) {
743							for (var name in styles) {
744								this.styles[name] = styles[name];
745							}
746						}
747						styles = svg.Styles[node.nodeName+'.'+classes[j]];
748						if (styles != null) {
749							for (var name in styles) {
750								this.styles[name] = styles[name];
751							}
752						}
753					}
754				}
755				
756				// add id styles
757				if (this.attribute('id').hasValue()) {
758					var styles = svg.Styles['#' + this.attribute('id').value];
759					if (styles != null) {
760						for (var name in styles) {
761							this.styles[name] = styles[name];
762						}
763					}
764				}
765				
766				// add inline styles
767				if (this.attribute('style').hasValue()) {
768					var styles = this.attribute('style').value.split(';');
769					for (var i=0; i<styles.length; i++) {
770						if (svg.trim(styles[i]) != '') {
771							var style = styles[i].split(':');
772							var name = svg.trim(style[0]);
773							var value = svg.trim(style[1]);
774							this.styles[name] = new svg.Property(name, value);
775						}
776					}
777				}	
778
779				// add id
780				if (this.attribute('id').hasValue()) {
781					if (svg.Definitions[this.attribute('id').value] == null) {
782						svg.Definitions[this.attribute('id').value] = this;
783					}
784				}
785			}
786		}
787		
788		svg.Element.RenderedElementBase = function(node) {
789			this.base = svg.Element.ElementBase;
790			this.base(node);
791			
792			this.setContext = function(ctx) {
793				// fill
794				if (this.style('fill').isUrlDefinition()) {
795					var fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity'));
796					if (fs != null) ctx.fillStyle = fs;
797				}
798				else if (this.style('fill').hasValue()) {
799					var fillStyle = this.style('fill');
800					if (fillStyle.value == 'currentColor') fillStyle.value = this.style('color').value;
801					ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
802				}
803				if (this.style('fill-opacity').hasValue()) {
804					var fillStyle = new svg.Property('fill', ctx.fillStyle);
805					fillStyle = fillStyle.addOpacity(this.style('fill-opacity').value);
806					ctx.fillStyle = fillStyle.value;
807				}
808									
809				// stroke
810				if (this.style('stroke').isUrlDefinition()) {
811					var fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity'));
812					if (fs != null) ctx.strokeStyle = fs;
813				}
814				else if (this.style('stroke').hasValue()) {
815					var strokeStyle = this.style('stroke');
816					if (strokeStyle.value == 'currentColor') strokeStyle.value = this.style('color').value;
817					ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
818				}
819				if (this.style('stroke-opacity').hasValue()) {
820					var strokeStyle = new svg.Property('stroke', ctx.strokeStyle);
821					strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity').value);
822					ctx.strokeStyle = strokeStyle.value;
823				}
824				if (this.style('stroke-width').hasValue()) {
825					var newLineWidth = this.style('stroke-width').toPixels();
826					ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth; // browsers don't respect 0
827			    }
828				if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value;
829				if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value;
830				if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value;
831				if (this.style('stroke-dasharray').hasValue()) {
832					var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value);
833					if (typeof(ctx.setLineDash) != 'undefined') { ctx.setLineDash(gaps); }
834					else if (typeof(ctx.webkitLineDash) != 'undefined') { ctx.webkitLineDash = gaps; }
835					else if (typeof(ctx.mozDash ) != 'undefined') { ctx.mozDash  = gaps; }
836					
837					var offset = this.style('stroke-dashoffset').numValueOrDefault(1);

838					if (typeof(ctx.lineDashOffset) != 'undefined') { ctx.lineDashOffset = offset; }
839					else if (typeof(ctx.webkitLineDashOffset) != 'undefined') { ctx.webkitLineDashOffset = offset; }
840					else if (typeof(ctx.mozDashOffset) != 'undefined') { ctx.mozDashOffset = offset; }
841				}
842
843				// font
844				if (typeof(ctx.font) != 'undefined') {
845					ctx.font = svg.Font.CreateFont( 
846						this.style('font-style').value, 
847						this.style('font-variant').value, 
848						this.style('font-weight').value, 
849						this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '', 
850						this.style('font-family').value).toString();
851				}
852				
853				// transform
854				if (this.attribute('transform').hasValue()) { 
855					var transform = new svg.Transform(this.attribute('transform').value);
856					transform.apply(ctx);
857				}
858				
859				// clip
860				if (this.style('clip-path').hasValue()) {
861					var clip = this.style('clip-path').getDefinition();
862					if (clip != null) clip.apply(ctx);
863				}
864				
865				// opacity
866				if (this.style('opacity').hasValue()) {
867					ctx.globalAlpha = this.style('opacity').numValue();
868				}
869			}		
870		}
871		svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase;
872		
873		svg.Element.PathElementBase = function(node) {
874			this.base = svg.Element.RenderedElementBase;
875			this.base(node);
876			
877			this.path = function(ctx) {
878				if (ctx != null) ctx.beginPath();
879				return new svg.BoundingBox();
880			}
881			
882			this.renderChildren = function(ctx) {
883				this.path(ctx);
884				svg.Mouse.checkPath(this, ctx);
885				if (ctx.fillStyle != '') {
886					if (this.attribute('fill-rule').hasValue()) { ctx.fill(this.attribute('fill-rule').value); }
887					else { ctx.fill(); }
888				}
889				if (ctx.strokeStyle != '') ctx.stroke();
890				
891				var markers = this.getMarkers();
892				if (markers != null) {
893					if (this.style('marker-start').isUrlDefinition()) {
894						var marker = this.style('marker-start').getDefinition();
895						marker.render(ctx, markers[0][0], markers[0][1]);
896					}
897					if (this.style('marker-mid').isUrlDefinition()) {
898						var marker = this.style('marker-mid').getDefinition();
899						for (var i=1;i<markers.length-1;i++) {
900							marker.render(ctx, markers[i][0], markers[i][1]);
901						}
902					}
903					if (this.style('marker-end').isUrlDefinition()) {
904						var marker = this.style('marker-end').getDefinition();
905						marker.render(ctx, markers[markers.length-1][0], markers[markers.length-1][1]);
906					}
907				}					
908			}
909			
910			this.getBoundingBox = function() {
911				return this.path();
912			}
913			
914			this.getMarkers = function() {
915				return null;
916			}
917		}
918		svg.Element.PathElementBase.prototype = new svg.Element.RenderedElementBase;
919		
920		// svg element
921		svg.Element.svg = function(node) {
922			this.base = svg.Element.RenderedElementBase;
923			this.base(node);
924			
925			this.baseClearContext = this.clearContext;
926			this.clearContext = function(ctx) {
927				this.baseClearContext(ctx);
928				svg.ViewPort.RemoveCurrent();
929			}
930			
931			this.baseSetContext = this.setContext;
932			this.setContext = function(ctx) {
933				// initial values
934				ctx.strokeStyle = 'rgba(0,0,0,0)';
935				ctx.lineCap = 'butt';
936				ctx.lineJoin = 'miter';
937				ctx.miterLimit = 4;			
938			
939				this.baseSetContext(ctx);
940				
941				// create new view port
942				if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0;
943				if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0;
944				ctx.translate(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y'));
945				
946				var width = svg.ViewPort.width();
947				var height = svg.ViewPort.height();
948				
949				if (!this.attribute('width').hasValue()) this.attribute('width', true).value = '100%';
950				if (!this.attribute('height').hasValue()) this.attribute('height', true).value = '100%';
951				if (typeof(this.root) == 'undefined') {
952					width = this.attribute('width').toPixels('x');
953					height = this.attribute('height').toPixels('y');
954					
955					var x = 0;
956					var y = 0;
957					if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
958						x = -this.attribute('refX').toPixels('x');
959						y = -this.attribute('refY').toPixels('y');
960					}
961					
962					ctx.beginPath();
963					ctx.moveTo(x, y);
964					ctx.lineTo(width, y);
965					ctx.lineTo(width, height);
966					ctx.lineTo(x, height);
967					ctx.closePath();
968					ctx.clip();
969				}
970				svg.ViewPort.SetCurrent(width, height);	
971						
972				// viewbox
973				if (this.attribute('viewBox').hasValue()) {				
974					var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
975					var minX = viewBox[0];
976					var minY = viewBox[1];
977					width = viewBox[2];
978					height = viewBox[3];
979					
980					svg.AspectRatio(ctx,
981									this.attribute('preserveAspectRatio').value, 
982									svg.ViewPort.width(), 
983									width,
984									svg.ViewPort.height(),
985									height,
986									minX,
987									minY,
988									this.attribute('refX').value,
989									this.attribute('refY').value);
990										
991					svg.ViewPort.RemoveCurrent();	
992					svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);						
993				}				
994			}
995		}
996		svg.Element.svg.prototype = new svg.Element.RenderedElementBase;
997
998		// rect element
999		svg.Element.rect = function(node) {
1000			this.base = svg.Element.PathElementBase;
1001			this.base(node);
1002			
1003			this.path = function(ctx) {
1004				var x = this.attribute('x').toPixels('x');
1005				var y = this.attribute('y').toPixels('y');
1006				var width = this.attribute('width').toPixels('x');
1007				var height = this.attribute('height').toPixels('y');
1008				var rx = this.attribute('rx').toPixels('x');
1009				var ry = this.attribute('ry').toPixels('y');
1010				if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
1011				if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
1012				rx = Math.min(rx, width / 2.0);
1013				ry = Math.min(ry, height / 2.0);
1014				if (ctx != null) {
1015					ctx.beginPath();
1016					ctx.moveTo(x + rx, y);
1017					ctx.lineTo(x + width - rx, y);
1018					ctx.quadraticCurveTo(x + width, y, x + width, y + ry)
1019					ctx.lineTo(x + width, y + height - ry);
1020					ctx.quadraticCurveTo(x + width, y + height, x + width - rx, y + height)
1021					ctx.lineTo(x + rx, y + height);
1022					ctx.quadraticCurveTo(x, y + height, x, y + height - ry)
1023					ctx.lineTo(x, y + ry);
1024					ctx.quadraticCurveTo(x, y, x + rx, y)
1025					ctx.closePath();
1026				}
1027				
1028				return new svg.BoundingBox(x, y, x + width, y + height);
1029			}
1030		}
1031		svg.Element.rect.prototype = new svg.Element.PathElementBase;
1032		
1033		// circle element
1034		svg.Element.circle = function(node) {
1035			this.base = svg.Element.PathElementBase;
1036			this.base(node);
1037			
1038			this.path = function(ctx) {
1039				var cx = this.attribute('cx').toPixels('x');
1040				var cy = this.attribute('cy').toPixels('y');
1041				var r = this.attribute('r').toPixels();
1042			
1043				if (ctx != null) {
1044					ctx.beginPath();
1045					ctx.arc(cx, cy, r, 0, Math.PI * 2, true); 
1046					ctx.closePath();
1047				}
1048				
1049				return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r);
1050			}
1051		}
1052		svg.Element.circle.prototype = new svg.Element.PathElementBase;	
1053
1054		// ellipse element
1055		svg.Element.ellipse = function(node) {
1056			this.base = svg.Element.PathElementBase;
1057			this.base(node);
1058			
1059			this.path = function(ctx) {
1060				var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
1061				var rx = this.attribute('rx').toPixels('x');
1062				var ry = this.attribute('ry').toPixels('y');
1063				var cx = this.attribute('cx').toPixels('x');
1064				var cy = this.attribute('cy').toPixels('y');
1065				
1066				if (ctx != null) {
1067					ctx.beginPath();
1068					ctx.moveTo(cx, cy - ry);
1069					ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry,  cx + rx, cy - (KAPPA * ry), cx + rx, cy);
1070					ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry);
1071					ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy);
1072					ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
1073					ctx.closePath();
1074				}
1075				
1076				return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry);
1077			}
1078		}
1079		svg.Element.ellipse.prototype = new svg.Element.PathElementBase;			
1080		
1081		// line element
1082		svg.Element.line = function(node) {
1083			this.base = svg.Element.PathElementBase;
1084			this.base(node);
1085			
1086			this.getPoints = function() {
1087				return [
1088					new svg.Point(this.attribute('x1').toPixels('x'), this.attribute('y1').toPixels('y')),
1089					new svg.Point(this.attribute('x2').toPixels('x'), this.attribute('y2').toPixels('y'))];
1090			}
1091								
1092			this.path = function(ctx) {
1093				var points = this.getPoints();

1094				
1095				if (ctx != null) {
1096					ctx.beginPath();
1097					ctx.moveTo(points[0].x, points[0].y);
1098					ctx.lineTo(points[1].x, points[1].y);
1099				}
1100				
1101				return new svg.BoundingBox(points[0].x, points[0].y, points[1].x, points[1].y);
1102			}
1103			
1104			this.getMarkers = function() {
1105				var points = this.getPoints();	
1106				var a = points[0].angleTo(points[1]);
1107				return [[points[0], a], [points[1], a]];
1108			}
1109		}
1110		svg.Element.line.prototype = new svg.Element.PathElementBase;		
1111				
1112		// polyline element
1113		svg.Element.polyline = function(node) {
1114			this.base = svg.Element.PathElementBase;
1115			this.base(node);
1116			
1117			this.points = svg.CreatePath(this.attribute('points').value);
1118			this.path = function(ctx) {
1119				var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y);
1120				if (ctx != null) {
1121					ctx.beginPath();
1122					ctx.moveTo(this.points[0].x, this.points[0].y);
1123				}
1124				for (var i=1; i<this.points.length; i++) {
1125					bb.addPoint(this.points[i].x, this.points[i].y);
1126					if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y);
1127				}
1128				return bb;
1129			}
1130			
1131			this.getMarkers = function() {
1132				var markers = [];
1133				for (var i=0; i<this.points.length - 1; i++) {
1134					markers.push([this.points[i], this.points[i].angleTo(this.points[i+1])]);
1135				}
1136				markers.push([this.points[this.points.length-1], markers[markers.length-1][1]]);
1137				return markers;
1138			}			
1139		}
1140		svg.Element.polyline.prototype = new svg.Element.PathElementBase;				
1141				
1142		// polygon element
1143		svg.Element.polygon = function(node) {
1144			this.base = svg.Element.polyline;
1145			this.base(node);
1146			
1147			this.basePath = this.path;
1148			this.path = function(ctx) {
1149				var bb = this.basePath(ctx);
1150				if (ctx != null) {
1151					ctx.lineTo(this.points[0].x, this.points[0].y);
1152					ctx.closePath();
1153				}
1154				return bb;
1155			}
1156		}
1157		svg.Element.polygon.prototype = new svg.Element.polyline;
1158
1159		// path element
1160		svg.Element.path = function(node) {
1161			this.base = svg.Element.PathElementBase;
1162			this.base(node);
1163					
1164			var d = this.attribute('d').value;
1165			// TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
1166			d = d.replace(/,/gm,' '); // get rid of all commas
1167			d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm,'$1 $2'); // separate commands from commands
1168			d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm,'$1 $2'); // separate commands from commands
1169			d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm,'$1 $2'); // separate commands from points
1170			d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm,'$1 $2'); // separate commands from points
1171			d = d.replace(/([0-9])([+\-])/gm,'$1 $2'); // separate digits when no comma
1172			d = d.replace(/(\.[0-9]*)(\.)/gm,'$1 $2'); // separate digits when no comma
1173			d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm,'$1 $3 $4 '); // shorthand elliptical arc path syntax
1174			d = svg.compressSpaces(d); // compress multiple spaces
1175			d = svg.trim(d);
1176			this.PathParser = new (function(d) {
1177				this.tokens = d.split(' ');
1178				
1179				this.reset = function() {
1180					this.i = -1;
1181					this.command = '';
1182					this.previousCommand = '';
1183					this.start = new svg.Point(0, 0);
1184					this.control = new svg.Point(0, 0);
1185					this.current = new svg.Point(0, 0);
1186					this.points = [];
1187					this.angles = [];
1188				}
1189								
1190				this.isEnd = function() {
1191					return this.i >= this.tokens.length - 1;
1192				}
1193				
1194				this.isCommandOrEnd = function() {
1195					if (this.isEnd()) return true;
1196					return this.tokens[this.i + 1].match(/^[A-Za-z]$/) != null;
1197				}
1198				
1199				this.isRelativeCommand = function() {
1200					switch(this.command)
1201					{
1202						case 'm':
1203						case 'l':
1204						case 'h':
1205						case 'v':
1206						case 'c':
1207						case 's':
1208						case 'q':
1209						case 't':
1210						case 'a':
1211						case 'z':
1212							return true;
1213							break;
1214					}
1215					return false;
1216				}
1217							
1218				this.getToken = function() {
1219					this.i++;
1220					return this.tokens[this.i];
1221				}
1222				

1223				this.getScalar = function() {
1224					return parseFloat(this.getToken());
1225				}
1226				
1227				this.nextCommand = function() {
1228					this.previousCommand = this.command;
1229					this.command = this.getToken();
1230				}				
1231				
1232				this.getPoint = function() {
1233					var p = new svg.Point(this.getScalar(), this.getScalar());
1234					return this.makeAbsolute(p);
1235				}
1236				
1237				this.getAsControlPoint = function() {
1238					var p = this.getPoint();
1239					this.control = p;
1240					return p;
1241				}
1242				
1243				this.getAsCurrentPoint = function() {
1244					var p = this.getPoint();
1245					this.current = p;
1246					return p;	
1247				}
1248				
1249				this.getReflectedControlPoint = function() {
1250					if (this.previousCommand.toLowerCase() != 'c' && 
1251					    this.previousCommand.toLowerCase() != 's' &&
1252						this.previousCommand.toLowerCase() != 'q' && 
1253						this.previousCommand.toLowerCase() != 't' ){
1254						return this.current;
1255					}
1256					
1257					// reflect point
1258					var p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y);					
1259					return p;
1260				}
1261				
1262				this.makeAbsolute = function(p) {
1263					if (this.isRelativeCommand()) {
1264						p.x += this.current.x;
1265						p.y += this.current.y;
1266					}
1267					return p;
1268				}
1269				
1270				this.addMarker = function(p, from, priorTo) {
1271					// if the last angle isn't filled in because we didn't have this point yet ...
1272					if (priorTo != null && this.angles.length > 0 && this.angles[this.angles.length-1] == null) {
1273						this.angles[this.angles.length-1] = this.points[this.points.length-1].angleTo(priorTo);
1274					}
1275					this.addMarkerAngle(p, from == null ? null : from.angleTo(p));
1276				}
1277				
1278				this.addMarkerAngle = function(p, a) {
1279					this.points.push(p);
1280					this.angles.push(a);
1281				}				
1282				
1283				this.getMarkerPoints = function() { return this.points; }
1284				this.getMarkerAngles = function() {
1285					for (var i=0; i<this.angles.length; i++) {
1286						if (this.angles[i] == null) {
1287							for (var j=i+1; j<this.angles.length; j++) {
1288								if (this.angles[j] != null) {
1289									this.angles[i] = this.angles[j];
1290									break;
1291								}
1292							}
1293						}
1294					}
1295					return this.angles;
1296				}
1297			})(d);
1298
1299			this.path = function(ctx) {
1300				var pp = this.PathParser;
1301				pp.reset();
1302
1303				var bb = new svg.BoundingBox();
1304				if (ctx != null) ctx.beginPath();
1305				while (!pp.isEnd()) {
1306					pp.nextCommand();
1307					switch (pp.command) {
1308					case 'M':
1309					case 'm':
1310						var p = pp.getAsCurrentPoint();
1311						pp.addMarker(p);
1312						bb.addPoint(p.x, p.y);
1313						if (ctx != null) ctx.moveTo(p.x, p.y);
1314						pp.start = pp.current;
1315						while (!pp.isCommandOrEnd()) {
1316							var p = pp.getAsCurrentPoint();
1317							pp.addMarker(p, pp.start);
1318							bb.addPoint(p.x, p.y);
1319							if (ctx != null) ctx.lineTo(p.x, p.y);
1320						}
1321						break;
1322					case 'L':
1323					case 'l':
1324						while (!pp.isCommandOrEnd()) {
1325							var c = pp.current;
1326							var p = pp.getAsCurrentPoint();
1327							pp.addMarker(p, c);
1328							bb.addPoint(p.x, p.y);
1329							if (ctx != null) ctx.lineTo(p.x, p.y);
1330						}
1331						break;
1332					case 'H':
1333					case 'h':
1334						while (!pp.isCommandOrEnd()) {
1335							var newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(), pp.current.y);
1336							pp.addMarker(newP, pp.current);
1337							pp.current = newP;
1338							bb.addPoint(pp.current.x, pp.current.y);
1339							if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
1340						}
1341						break;
1342					case 'V':
1343					case 'v':
1344						while (!pp.isCommandOrEnd()) {
1345							var newP = new svg.Point(pp.current.x, (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar());
1346							pp.addMarker(newP, pp.current);
1347							pp.current = newP;
1348							bb.addPoint(pp.current.x, pp.current.y);
1349							if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
1350						}
1351						break;
1352					case 'C':
1353					case 'c':
1354						while (!pp.isCommandOrEnd()) {
1355							var curr = pp.current;
1356							var p1 = pp.getPoint();
1357							var cntrl = pp.getAsControlPoint();
1358							var cp = pp.getAsCurrentPoint();
1359							pp.addMarker(cp, cntrl, p1);
1360							bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
1361							if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
1362						}
1363						break;
1364					case 'S':
1365					case 's':
1366						while (!pp.isCommandOrEnd()) {
1367							var curr = pp.current;
1368							var p1 = pp.getReflectedControlPoint();
1369							var cntrl = pp.getAsControlPoint();
1370							var cp = pp.getAsCurrentPoint();
1371							pp.addMarker(cp, cntrl, p1);
1372							bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
1373							if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
1374						}
1375						break;
1376					case 'Q':
1377					case 'q':
1378						while (!pp.isCommandOrEnd()) {
1379							var curr = pp.current;
1380							var cntrl = pp.getAsControlPoint();
1381							var cp = pp.getAsCurrentPoint();
1382							pp.addMarker(cp, cntrl, cntrl);
1383							bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
1384							if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
1385						}
1386						break;
1387					case 'T':
1388					case 't':
1389						while (!pp.isCommandOrEnd()) {
1390							var curr = pp.current;
1391							var cntrl = pp.getReflectedControlPoint();
1392							pp.control = cntrl;
1393							var cp = pp.getAsCurrentPoint();
1394							pp.addMarker(cp, cntrl, cntrl);
1395							bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
1396							if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
1397						}
1398						break;
1399					case 'A':
1400					case 'a':
1401						while (!pp.isCommandOrEnd()) {
1402						    var curr = pp.current;
1403							var rx = pp.getScalar();
1404							var ry = pp.getScalar();
1405							var xAxisRotation = pp.getScalar() * (Math.PI / 180.0);
1406							var largeArcFlag = pp.getScalar();
1407							var sweepFlag = pp.getScalar();
1408							var cp = pp.getAsCurrentPoint();
1409
1410							// Conversion from endpoint to center parameterization
1411							// http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
1412							// x1', y1'
1413							var currp = new svg.Point(
1414								Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0,
1415								-Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.

1415cos(xAxisRotation) * (curr.y - cp.y) / 2.0
1416							);
1417							// adjust radii
1418							var l = Math.pow(currp.x,2)/Math.pow(rx,2)+Math.pow(currp.y,2)/Math.pow(ry,2);
1419							if (l > 1) {
1420								rx *= Math.sqrt(l);
1421								ry *= Math.sqrt(l);
1422							}
1423							// cx', cy'
1424							var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
1425								((Math.pow(rx,2)*Math.pow(ry,2))-(Math.pow(rx,2)*Math.pow(currp.y,2))-(Math.pow(ry,2)*Math.pow(currp.x,2))) /
1426								(Math.pow(rx,2)*Math.pow(currp.y,2)+Math.pow(ry,2)*Math.pow(currp.x,2))
1427							);
1428							if (isNaN(s)) s = 0;
1429							var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
1430							// cx, cy
1431							var centp = new svg.Point(
1432								(curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
1433								(curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
1434							);
1435							// vector magnitude
1436							var m = function(v) { return Math.sqrt(Math.pow(v[0],2) + Math.pow(v[1],2)); }
1437							// ratio between two vectors
1438							var r = function(u, v) { return (u[0]*v[0]+u[1]*v[1]) / (m(u)*m(v)) }
1439							// angle between two vectors
1440							var a = function(u, v) { return (u[0]*v[1] < u[1]*v[0] ? -1 : 1) * Math.acos(r(u,v)); }
1441							// initial angle
1442							var a1 = a([1,0], [(currp.x-cpp.x)/rx,(currp.y-cpp.y)/ry]);
1443							// angle delta
1444							var u = [(currp.x-cpp.x)/rx,(currp.y-cpp.y)/ry];
1445							var v = [(-currp.x-cpp.x)/rx,(-currp.y-cpp.y)/ry];
1446							var ad = a(u, v);
1447							if (r(u,v) <= -1) ad = Math.PI;
1448							if (r(u,v) >= 1) ad = 0;
1449
1450							// for markers
1451							var dir = 1 - sweepFlag ? 1.0 : -1.0;
1452							var ah = a1 + dir * (ad / 2.0);
1453							var halfWay = new svg.Point(
1454								centp.x + rx * Math.cos(ah),
1455								centp.y + ry * Math.sin(ah)
1456							);
1457							pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2);
1458							pp.addMarkerAngle(cp, ah - dir * Math.PI);
1459
1460							bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
1461							if (ctx != null) {
1462								var r = rx > ry ? rx : ry;
1463								var sx = rx > ry ? 1 : rx / ry;
1464								var sy = rx > ry ? ry / rx : 1;
1465
1466								ctx.translate(centp.x, centp.y);
1467								ctx.rotate(xAxisRotation);
1468								ctx.scale(sx, sy);
1469								ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag);
1470								ctx.scale(1/sx, 1/sy);
1471								ctx.rotate(-xAxisRotation);
1472								ctx.translate(-centp.x, -centp.y);
1473							}
1474						}
1475						break;
1476					case 'Z':
1477					case 'z':
1478						if (ctx != null) ctx.closePath();
1479						pp.current = pp.start;
1480					}
1481				}
1482
1483				return bb;
1484			}
1485
1486			this.getMarkers = function() {
1487				var points = this.PathParser.getMarkerPoints();
1488				var angles = this.PathParser.getMarkerAngles();
1489				
1490				var markers = [];
1491				for (var i=0; i<points.length; i++) {
1492					markers.push([points[i], angles[i]]);
1493				}
1494				return markers;
1495			}
1496		}
1497		svg.Element.path.prototype = new svg.Element.PathElementBase;
1498		
1499		// pattern element
1500		svg.Element.pattern = function(node) {
1501			this.base = svg.Element.ElementBase;
1502			this.base(node);
1503			
1504			this.createPattern = function(ctx, element) {
1505				var width = this.attribute('width').toPixels('x', true);
1506				var height = this.attribute('height').toPixels('y', true);
1507			
1508				// render me using a temporary svg element
1509				var tempSvg = new svg.Element.svg();
1510				tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
1511				tempSvg.attributes['width'] = new svg.Property('width', width + 'px');
1512				tempSvg.attributes['height'] = new svg.Property('height', height + 'px');
1513				tempSvg.attributes['transform'] = new svg.Property('transform', this.attribute('patternTransform').value);
1514				tempSvg.children = this.children;
1515				
1516				var c = document.createElement('canvas');
1517				c.width = width;
1518				c.height = height;
1519				var cctx = c.getContext('2d');
1520				if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
1521					cctx.translate(this.attribute('x').toPixels('x', true), this.attribute('y').toPixels('y', true));
1522				}
1523				// render 3x3 grid so when we transform there's no white space on edges
1524				for (var x=-1; x<=1; x++) {
1525					for (var y=-1; y<=1; y++) {
1526						cctx.save();
1527						cctx.translate(x * c.width, y * c.height);
1528						tempSvg.render(cctx);

1529						cctx.restore();
1530					}
1531				}
1532				var pattern = ctx.createPattern(c, 'repeat');
1533				return pattern;
1534			}
1535		}
1536		svg.Element.pattern.prototype = new svg.Element.ElementBase;
1537		
1538		// marker element
1539		svg.Element.marker = function(node) {
1540			this.base = svg.Element.ElementBase;
1541			this.base(node);
1542			
1543			this.baseRender = this.render;
1544			this.render = function(ctx, point, angle) {
1545				ctx.translate(point.x, point.y);
1546				if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(angle);
1547				if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth);
1548				ctx.save();
1549							
1550				// render me using a temporary svg element
1551				var tempSvg = new svg.Element.svg();
1552				tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
1553				tempSvg.attributes['refX'] = new svg.Property('refX', this.attribute('refX').value);
1554				tempSvg.attributes['refY'] = new svg.Property('refY', this.attribute('refY').value);
1555				tempSvg.attributes['width'] = new svg.Property('width', this.attribute('markerWidth').value);
1556				tempSvg.attributes['height'] = new svg.Property('height', this.attribute('markerHeight').value);
1557				tempSvg.attributes['fill'] = new svg.Property('fill', this.attribute('fill').valueOrDefault('black'));
1558				tempSvg.attributes['stroke'] = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none'));
1559				tempSvg.children = this.children;
1560				tempSvg.render(ctx);
1561				
1562				ctx.restore();
1563				if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(1/ctx.lineWidth, 1/ctx.lineWidth);
1564				if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(-angle);
1565				ctx.translate(-point.x, -point.y);
1566			}
1567		}
1568		svg.Element.marker.prototype = new svg.Element.ElementBase;
1569		
1570		// definitions element
1571		svg.Element.defs = function(node) {
1572			this.base = svg.Element.ElementBase;
1573			this.base(node);	
1574			
1575			this.render = function(ctx) {
1576				// NOOP
1577			}
1578		}
1579		svg.Element.defs.prototype = new svg.Element.ElementBase;
1580		
1581		// base for gradients
1582		svg.Element.GradientBase = function(node) {
1583			this.base = svg.Element.ElementBase;
1584			this.base(node);
1585			
1586			this.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
1587			
1588			this.stops = [];			
1589			for (var i=0; i<this.children.length; i++) {
1590				var child = this.children[i];
1591				if (child.type == 'stop') this.stops.push(child);
1592			}	
1593			
1594			this.getGradient = function() {
1595				// OVERRIDE ME!
1596			}			
1597
1598			this.createGradient = function(ctx, element, parentOpacityProp) {
1599				var stopsContainer = this;
1600				if (this.getHrefAttribute().hasValue()) {
1601					stopsContainer = this.getHrefAttribute().getDefinition();
1602				}
1603				
1604				var addParentOpacity = function (color) {
1605					if (parentOpacityProp.hasValue()) {
1606						var p = new svg.Property('color', color);
1607						return p.addOpacity(parentOpacityProp.value).value;
1608					}
1609					return color;
1610				};
1611			
1612				var g = this.getGradient(ctx, element);
1613				if (g == null) return addParentOpacity(stopsContainer.stops[stopsContainer.stops.length - 1].color);
1614				for (var i=0; i<stopsContainer.stops.length; i++) {
1615					g.addColorStop(stopsContainer.stops[i].offset, addParentOpacity(stopsContainer.stops[i].color));
1616				}
1617				
1618				if (this.attribute('gradientTransform').hasValue()) {
1619					// render as transformed pattern on temporary canvas
1620					var rootView = svg.ViewPort.viewPorts[0];
1621					
1622					var rect = new svg.Element.rect();
1623					rect.attributes['x'] = new svg.Property('x', -svg.MAX_VIRTUAL_PIXELS/3.0);
1624					rect.attributes['y'] = new svg.Property('y', -svg.MAX_VIRTUAL_PIXELS/3.0);
1625					rect.attributes['width'] = new svg.Property('width', svg.MAX_VIRTUAL_PIXELS);
1626					rect.attributes['height'] = new svg.Property('height', svg.MAX_VIRTUAL_PIXELS);
1627					
1628					var group = new svg.Element.g();
1629					group.attributes['transform'] = new svg.Property('transform', this.attribute('gradientTransform').value);
1630					group.children = [ rect ];
1631					
1632					var tempSvg = new svg.Element.svg();
1633					tempSvg.attributes['x'] = new svg.Property('x', 0);
1634					tempSvg.attributes['y'] = new svg.Property('y', 0);
1635					tempSvg.attributes['width'] = new svg.Property('width', rootView.width);
1636					tempSvg.attributes['height'] = new svg.Property('height', root

1636View.height);
1637					tempSvg.children = [ group ];
1638					
1639					var c = document.createElement('canvas');
1640					c.width = rootView.width;
1641					c.height = rootView.height;
1642					var tempCtx = c.getContext('2d');
1643					tempCtx.fillStyle = g;
1644					tempSvg.render(tempCtx);		
1645					return tempCtx.createPattern(c, 'no-repeat');
1646				}
1647				
1648				return g;				
1649			}
1650		}
1651		svg.Element.GradientBase.prototype = new svg.Element.ElementBase;
1652		
1653		// linear gradient element
1654		svg.Element.linearGradient = function(node) {
1655			this.base = svg.Element.GradientBase;
1656			this.base(node);
1657			
1658			this.getGradient = function(ctx, element) {
1659				var bb = element.getBoundingBox();
1660				
1661				if (!this.attribute('x1').hasValue()
1662				 && !this.attribute('y1').hasValue()
1663				 && !this.attribute('x2').hasValue()
1664				 && !this.attribute('y2').hasValue()) {
1665					this.attribute('x1', true).value = 0;
1666					this.attribute('y1', true).value = 0;
1667					this.attribute('x2', true).value = 1;
1668					this.attribute('y2', true).value = 0;
1669				 }
1670				
1671				var x1 = (this.gradientUnits == 'objectBoundingBox' 
1672					? bb.x() + bb.width() * this.attribute('x1').numValue() 
1673					: this.attribute('x1').toPixels('x'));
1674				var y1 = (this.gradientUnits == 'objectBoundingBox' 
1675					? bb.y() + bb.height() * this.attribute('y1').numValue()
1676					: this.attribute('y1').toPixels('y'));
1677				var x2 = (this.gradientUnits == 'objectBoundingBox' 
1678					? bb.x() + bb.width() * this.attribute('x2').numValue()
1679					: this.attribute('x2').toPixels('x'));
1680				var y2 = (this.gradientUnits == 'objectBoundingBox' 
1681					? bb.y() + bb.height() * this.attribute('y2').numValue()
1682					: this.attribute('y2').toPixels('y'));
1683
1684				if (x1 == x2 && y1 == y2) return null;
1685				return ctx.createLinearGradient(x1, y1, x2, y2);
1686			}
1687		}
1688		svg.Element.linearGradient.prototype = new svg.Element.GradientBase;
1689		
1690		// radial gradient element
1691		svg.Element.radialGradient = function(node) {
1692			this.base = svg.Element.GradientBase;
1693			this.base(node);
1694			
1695			this.getGradient = function(ctx, element) {
1696				var bb = element.getBoundingBox();
1697				
1698				if (!this.attribute('cx').hasValue()) this.attribute('cx', true).value = '50%';
1699				if (!this.attribute('cy').hasValue()) this.attribute('cy', true).value = '50%';
1700				if (!this.attribute('r').hasValue()) this.attribute('r', true).value = '50%';
1701				
1702				var cx = (this.gradientUnits == 'objectBoundingBox' 
1703					? bb.x() + bb.width() * this.attribute('cx').numValue() 
1704					: this.attribute('cx').toPixels('x'));
1705				var cy = (this.gradientUnits == 'objectBoundingBox' 
1706					? bb.y() + bb.height() * this.attribute('cy').numValue() 
1707					: this.attribute('cy').toPixels('y'));
1708				
1709				var fx = cx;
1710				var fy = cy;
1711				if (this.attribute('fx').hasValue()) {
1712					fx = (this.gradientUnits == 'objectBoundingBox' 
1713					? bb.x() + bb.width() * this.attribute('fx').numValue() 
1714					: this.attribute('fx').toPixels('x'));
1715				}
1716				if (this.attribute('fy').hasValue()) {
1717					fy = (this.gradientUnits == 'objectBoundingBox' 
1718					? bb.y() + bb.height() * this.attribute('fy').numValue() 
1719					: this.attribute('fy').toPixels('y'));
1720				}
1721				
1722				var r = (this.gradientUnits == 'objectBoundingBox' 
1723					? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
1724					: this.attribute('r').toPixels());
1725				
1726				return ctx.createRadialGradient(fx, fy, 0, cx, cy, r);
1727			}
1728		}
1729		svg.Element.radialGradient.prototype = new svg.Element.GradientBase;
1730		
1731		// gradient stop element
1732		svg.Element.stop = function(node) {
1733			this.base = svg.Element.ElementBase;
1734			this.base(node);
1735			
1736			this.offset = this.attribute('offset').numValue();
1737			if (this.offset < 0) this.offset = 0;
1738			if (this.offset > 1) this.offset = 1;
1739			
1740			var stopColor = this.style('stop-color');
1741			if (this.style('stop-opacity').hasValue()) stopColor = stopColor.addOpacity(this.style('stop-opacity').value);
1742			this.color = stopColor.value;
1743		}
1744		svg.Element.stop.prototype = new svg.Element.ElementBase;
1745		
1746		// animation base element
1747		svg.Element.AnimateBase = function(node) {
1748			this.base = svg.Element.ElementBase;
1749			this.base(node);
1750			
1751			svg.Animations.push(this);
1752			
1753			this.duration = 0.0;
1754			this.begin = this.attribute('begin').toMilliseconds();
1755			this.maxDuration = this.begin + this.attribute('dur').toMilliseconds();
1756			
1757			this.getProperty = function() {
1758				var attributeType = this.attribute('attributeType').value;
1759				var attributeName = this.attribute('attributeName').value;
1760				
1761				if (attributeType == 'CSS') {
1762					return this.parent.style(attributeName, true);
1763				}
1764				return this.parent.attribute(attributeName, true);			
1765			};
1766			
1767			this.initialValue = null;
1768			this.initialUnits = '';
1769			this.removed = false;			
1770
1771			this.calcValue = function() {
1772				// OVERRIDE ME!
1773				return '';
1774			}
1775					
1776			this.update = function(delta) {	
1777				// set initial value
1778				if (this.initialValue == null) {
1779					this.initialValue = this.getProperty().value;
1780					this.initialUnits = this.getProperty().getUnits();

1781				}
1782			
1783				// if we're past the end time
1784				if (this.duration > this.maxDuration) {
1785					// loop for indefinitely repeating animations
1786					if (this.attribute('repeatCount').value == 'indefinite'
1787					 || this.attribute('repeatDur').value == 'indefinite') {
1788						this.duration = 0.0
1789					}
1790					else if (this.attribute('fill').valueOrDefault('remove') == 'remove' && !this.removed) {
1791						this.removed = true;
1792						this.getProperty().value = this.initialValue;
1793						return true;
1794					}
1795					else {
1796						return false; // no updates made
1797					}
1798				}			
1799				this.duration = this.duration + delta;
1800			
1801				// if we're past the begin time
1802				var updated = false;
1803				if (this.begin < this.duration) {
1804					var newValue = this.calcValue(); // tween
1805					
1806					if (this.attribute('type').hasValue()) {
1807						// for transform, etc.
1808						var type = this.attribute('type').value;
1809						newValue = type + '(' + newValue + ')';
1810					}
1811					
1812					this.getProperty().value = newValue;
1813					updated = true;
1814				}
1815				
1816				return updated;
1817			}
1818			
1819			this.from = this.attribute('from');
1820			this.to = this.attribute('to');
1821			this.values = this.attribute('values');
1822			if (this.values.hasValue()) this.values.value = this.values.value.split(';');
1823			
1824			// fraction of duration we've covered
1825			this.progress = function() {
1826				var ret = { progress: (this.duration - this.begin) / (this.maxDuration - this.begin) };
1827				if (this.values.hasValue()) {
1828					var p = ret.progress * (this.values.value.length - 1);
1829					var lb = Math.floor(p), ub = Math.ceil(p);
1830					ret.from = new svg.Property('from', parseFloat(this.values.value[lb]));
1831					ret.to = new svg.Property('to', parseFloat(this.values.value[ub]));
1832					ret.progress = (p - lb) / (ub - lb);
1833				}
1834				else {
1835					ret.from = this.from;
1836					ret.to = this.to;
1837				}
1838				return ret;
1839			}			
1840		}
1841		svg.Element.AnimateBase.prototype = new svg.Element.ElementBase;
1842		
1843		// animate element
1844		svg.Element.animate = function(node) {
1845			this.base = svg.Element.AnimateBase;
1846			this.base(node);
1847			
1848			this.calcValue = function() {
1849				var p = this.progress();
1850				
1851				// tween value linearly
1852				var newValue = p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress; 
1853				return newValue + this.initialUnits;
1854			};
1855		}
1856		svg.Element.animate.prototype = new svg.Element.AnimateBase;
1857			
1858		// animate color element
1859		svg.Element.animateColor = function(node) {
1860			this.base = svg.Element.AnimateBase;
1861			this.base(node);
1862
1863			this.calcValue = function() {
1864				var p = this.progress();
1865				var from = new RGBColor(p.from.value);
1866				var to = new RGBColor(p.to.value);
1867				
1868				if (from.ok && to.ok) {
1869					// tween color linearly
1870					var r = from.r + (to.r - from.r) * p.progress;
1871					var g = from.g + (to.g - from.g) * p.progress;
1872					var b = from.b + (to.b - from.b) * p.progress;
1873					return 'rgb('+parseInt(r,10)+','+parseInt(g,10)+','+parseInt(b,10)+')';
1874				}
1875				return this.attribute('from').value;
1876			};
1877		}
1878		svg.Element.animateColor.prototype = new svg.Element.AnimateBase;
1879		
1880		// animate transform element
1881		svg.Element.animateTransform = function(node) {
1882			this.base = svg.Element.AnimateBase;
1883			this.base(node);
1884			
1885			this.calcValue = function() {
1886				var p = this.progress();
1887				
1888				// tween value linearly
1889				var from = svg.ToNumberArray(p.from.value);
1890				var to = svg.ToNumberArray(p.to.value);
1891				var newValue = '';
1892				for (var i=0; i<from.length; i++) {
1893					newValue += from[i] + (to[i] - from[i]) * p.progress + ' ';
1894				}
1895				return newValue;
1896			};
1897		}
1898		svg.Element.animateTransform.prototype = new svg.Element.animate;
1899		
1900		// font element
1901		svg.Element.font = function(node) {
1902			this.base = svg.Element.ElementBase;
1903			this.base(node);
1904
1905			this.horizAdvX = this.attribute('horiz-adv-x').numValue();			
1906			
1907			this.isRTL = false;
1908			this.isArabic = false;
1909			this.fontFace = null;
1910			this.missingGlyph = null;
1911			this.glyphs = [];			
1912			for (var i=0; i<this.children.length; i++) {
1913				var child = this.children[i];
1914				if (child.type == 'font-face') {
1915					this.fontFace = child;
1916					if (child.style('font-family').hasValue()) {
1917						svg.Definitions[child.style('font-family').value] = this;
1918					}
1919				}
1920				else if (child.type == 'missing-glyph') this.missingGlyph = child;
1921				else if (child.type == 'glyph') {
1922					if (child.arabicForm != '') {
1923						this.isRTL = true;
1924						this.isArabic = true;
1925						if (typeof(this.glyphs[child.unicode]) == 'undefined') this.glyphs[child.unicode] = [];
1926						this.glyphs[child.unicode][child.arabicForm] = child;
1927					}
1928					else {
1929						this.glyphs[child.unicode] = child;
1930					}
1931				}
1932			}	
1933		}
1934		svg.Element.font.prototype = new svg.Element.ElementBase;
1935		
1936		// font-face element
1937		svg.Element.fontface = function(node) {
1938			this.base = svg.Element.ElementBase;
1939			this.base(node);	
1940			
1941			this.ascent = this.attribute('ascent').value;
1942			this.descent = this.attribute('descent').value;
1943			this.unitsPerEm = this.attribute('units-per-em').numValue();				
1944		}
1945		svg.Element.fontface.prototype = new svg.Element.ElementBase;
1946		
1947		// missing-glyph element
1948		svg.Element.missingglyph = function(node) {
1949			this.base = svg.Element.path;
1950			this.base(node);	
1951			
1952			this.horizAdvX = 0;
1953		}
1954		svg.Element.missingglyph.prototype = new svg.Element.path;
1955		
1956		// glyph element
1957		svg.Element.glyph = function(node) {
1958			this.base = svg.Element.path;
1959			this.base(node);	
1960			
1961			this.horizAdvX = this.attribute('horiz-adv-x').numValue();
1962			this.unicode = this.attribute('unicode').value;
1963			this.arabicForm = this.attribute('arabic-form').value;
1964		}
1965		svg.Element.glyph.prototype = new svg.Element.path;
1966		
1967		// text element
1968		svg.Element.text = function(node) {
1969			this.captureTextNodes = true;
1970			this.base = svg.Element.RenderedElementBase;
1971			this.base(node);
1972			
1973			this.baseSetContext = this.setContext;
1974			this.setContext = function(ctx) {
1975				this.baseSetContext(ctx);
1976				if (this.style('dominant-baseline').hasValue()) ctx.textBaseline = this.style('dominant-baseline').value;
1977				if (this.style('alignment-baseline').hasValue()) ctx.textBaseline = this.style('alignment-baseline').value;
1978			}
1979			
1980			this.getBoundingBox = function () {
1981				// TODO: implement
1982				return new svg.BoundingBox(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y'), 0, 0);
1983			}
1984			
1985			this.renderChildren = function(ctx) {
1986				this.x = this.attribute('x').toPixels('x');
1987				this.y = this.attribute('y').toPixels('y');
1988				this.x += this.getAnchorDelta(ctx, this, 0);
1989				for (var i=0; i<this.children.length; i++) {
1990					this.renderChild(ctx, this, i);
1991				}
1992			}
1993			
1994			this.getAnchorDelta = function (ctx, parent, startI) {
1995				var textAnchor = this.style('text-anchor').valueOrDefault('start');
1996				if (textAnchor != 'start') {
1997					var width = 0;
1998					for (var i=startI; i<parent.children.length; i++) {
1999						var child = parent.children[i];
2000						if (i > startI && child.attribute('x').hasValue()) break; // new group
2001						width += child.measureTextRecursive(ctx);
2002					}
2003					return -1 * (textAnchor == 'end' ? width : width / 2.0);
2004				}
2005				return 0;
2006			}
2007			
2008			this.renderChild = function(ctx, parent, i) {
2009				var child = parent.children[i];
2010				if (child.attribute('x').hasValue()) {
2011					child.x = child.attribute('x').toPixels('x') + this.getAnchorDelta(ctx, parent, i);
2012				}
2013				else {
2014					if (this.attribute('dx').hasValue()) this.x += this.attribute('dx').toPixels('x');
2015					if (child.attribute('dx').hasValue()) this.x += child.attribute('dx').toPixels('x');
2016					child.x = this.x;
2017				}
2018				this.x = child.x + child.measureText(ctx);
2019				
2020				if (child.attribute('y').hasValue()) {
2021					child.y = child.attribute('y').toPixels('y');
2022				}
2023				else {
2024					if (this.attribute('dy').hasValue()) this.y += this.attribute('dy').toPixels('y');
2025					if (child.attribute('dy').hasValue()) this.y += child.attribute('dy').toPixels('y');
2026					child.y = this.y;
2027				}
2028				this.y = child.y;
2029				
2030				child.render(ctx);
2031				
2032				for (var i=0; i<child.children.length; i++) {
2033					this.renderChild(ctx, child, i);
2034				}
2035			}
2036		}
2037		svg.Element.text.prototype = new svg.Element.RenderedElementBase;
2038		
2039		// text base
2040		svg.Element.TextElementBase = function(node) {
2041			this.base = svg.Element.RenderedElementBase;
2042			this.base(node);
2043			
2044			this.getGlyph = function(font, text, i) {
2045				var c = text[i];
2046				var glyph = null;
2047				if (font.isArabic) {
2048					var arabicForm = 'isolated';
2049					if ((i==0 || text[i-1]==' ') && i<text.length-2 && text[i+1]!=' ') arabicForm = 'terminal'; 
2050					if (i>0 && text[i-1]!=' ' && i<text.length-2 && text[i+1]!=' ') arabicForm = 'medial';
2051					if (i>0 && text[i-1]!=' ' && (i == text.length-1 || text[i+1]==' ')) arabicForm = 'initial';
2052					if (typeof(font.glyphs[c]) != 'undefined') {
2053						glyph = font.glyphs[c][arabicForm];
2054						if (glyph == null && font.glyphs[c].type == 'glyph') glyph = font.glyphs[c];
2055					}
2056				}
2057				else {
2058					glyph = font.glyphs[c];
2059				}
2060				if (glyph == null) glyph = font.missingGlyph;
2061				return glyph;
2062			}
2063			
2064			this.renderChildren = function(ctx) {
2065				var customFont = this.parent.style('font-family').getDefinition();
2066				if (customFont != null) {
2067					var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
2068					var fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle);
2069					var text = this.getText();

2070					if (customFont.isRTL) text = text.split("").reverse().join("");
2071					
2072					var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
2073					for (var i=0; i<text.length; i++) {
2074						var glyph = this.getGlyph(customFont, text, i);
2075						var scale = fontSize / customFont.fontFace.unitsPerEm;
2076						ctx.translate(this.x, this.y);
2077						ctx.scale(scale, -scale);
2078						var lw = ctx.lineWidth;
2079						ctx.lineWidth = ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize;
2080						if (fontStyle == 'italic') ctx.transform(1, 0, .4, 1, 0, 0);
2081						glyph.render(ctx);
2082						if (fontStyle == 'italic') ctx.transform(1, 0, -.4, 1, 0, 0);
2083						ctx.lineWidth = lw;
2084						ctx.scale(1/scale, -1/scale);
2085						ctx.translate(-this.x, -this.y);	
2086						
2087						this.x += fontSize * (glyph.horizAdvX || customFont.horizAdvX) / customFont.fontFace.unitsPerEm;
2088						if (typeof(dx[i]) != 'undefined' && !isNaN(dx[i])) {
2089							this.x += dx[i];
2090						}
2091					}
2092					return;
2093				}
2094			
2095				if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
2096				if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
2097			}
2098			
2099			this.getText = function() {
2100				// OVERRIDE ME
2101			}
2102			
2103			this.measureTextRecursive = function(ctx) {
2104				var width = this.measureText(ctx);
2105				for (var i=0; i<this.children.length; i++) {
2106					width += this.children[i].measureTextRecursive(ctx);
2107				}
2108				return width;
2109			}
2110			
2111			this.measureText = function(ctx) {
2112				var customFont = this.parent.style('font-family').getDefinition();
2113				if (customFont != null) {
2114					var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
2115					var measure = 0;
2116					var text = this.getText();
2117					if (customFont.isRTL) text = text.split("").reverse().join("");
2118					var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
2119					for (var i=0; i<text.length; i++) {
2120						var glyph = this.getGlyph(customFont, text, i);
2121						measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm;
2122						if (typeof(dx[i]) != 'undefined' && !isNaN(dx[i])) {
2123							measure += dx[i];
2124						}
2125					}
2126					return measure;
2127				}
2128			
2129				var textToMeasure = svg.compressSpaces(this.getText());
2130				if (!ctx.measureText) return textToMeasure.length * 10;
2131				
2132				ctx.save();
2133				this.setContext(ctx);
2134				var width = ctx.measureText(textToMeasure).width;
2135				ctx.restore();
2136				return width;
2137			}
2138		}
2139		svg.Element.TextElementBase.prototype = new svg.Element.RenderedElementBase;
2140		
2141		// tspan 
2142		svg.Element.tspan = function(node) {
2143			this.captureTextNodes = true;
2144			this.base = svg.Element.TextElementBase;
2145			this.base(node);
2146			
2147			this.text = node.nodeValue || node.text || '';
2148			this.getText = function() {
2149				return this.text;
2150			}
2151		}
2152		svg.Element.tspan.prototype = new svg.Element.TextElementBase;
2153		
2154		// tref
2155		svg.Element.tref = function(node) {
2156			this.base = svg.Element.TextElementBase;
2157			this.base(node);
2158			
2159			this.getText = function() {
2160				var element = this.getHrefAttribute().getDefinition();
2161				if (element != null) return element.children[0].getText();
2162			}
2163		}
2164		svg.Element.tref.prototype = new svg.Element.TextElementBase;		
2165		
2166		// a element
2167		svg.Element.a = function(node) {
2168			this.base = svg.Element.TextElementBase;
2169			this.base(node);
2170			
2171			this.hasText = true;
2172			for (var i=0; i<node.childNodes.length; i++) {
2173				if (node.childNodes[i].nodeType != 3) this.hasText = false;
2174			}
2175			
2176			// this might contain text
2177			this.text = this.hasText ? node.childNodes[0].nodeValue : '';
2178			this.getText = function() {
2179				return this.text;
2180			}		
2181
2182			this.baseRenderChildren = this.renderChildren;
2183			this.renderChildren = function(ctx) {
2184				if (this.hasText) {
2185					// render as text element
2186					this.baseRenderChildren(ctx);
2187					var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
2188					svg.Mouse.checkBoundingBox(this, new svg.BoundingBox(this.x, this.y - fontSize.toPixels('y'), this.x + this.measureText(ctx), this.y));					
2189				}
2190				else {
2191					// render as temporary group
2192					var g = new svg.Element.g();
2193					g.children = this.children;
2194					g.parent = this;
2195					g.render(ctx);
2196				}
2197			}
2198			
2199			this.onclick = function() {
2200				window.open(this.getHrefAttribute().value);
2201			}
2202			
2203			this.onmousemove = function() {
2204				svg.ctx.canvas.style.cursor = 'pointer';
2205			}
2206		}
2207		svg.Element.a.prototype = new svg.Element.TextElementBase;		
2208		
2209		// image element
2210		svg.Element.image = function(node) {
2211			this.base = svg.Element.RenderedElementBase;
2212			this.base(node);
2213			
2214			var href = this.getHrefAttribute().value;
2215			var isSvg = href.match(/\.svg$/)
2216			
2217			svg.Images.push(this);
2218			this.loaded = false;
2219			if (!isSvg) {
2220				this.img = document.createElement('img');
2221				var self = this;
2222				this.img.onload = function() { self.loaded = true; }
2223				this.img.onerror = function() { if (typeof(console) != 'undefined') { console.log('ERROR: image "' + href + '" not found'); self.loaded = true; } }
2224				this.img.src = href;
2225			}
2226			else {
2227				this.img = svg.ajax(href);
2228				this.loaded = true;
2229			}
2230			
2231			this.renderChildren = function(ctx) {
2232				var x = this.attribute('x').toPixels('x');
2233				var y = this.attribute('y').toPixels('y');
2234				
2235				var width = this.attribute('width').toPixels('x');
2236				var height = this.attribute('height').toPixels('y');			
2237				if (width == 0 || height == 0) return;
2238			
2239				ctx.save();
2240				if (isSvg) {
2241					ctx.drawSvg(this.img, x, y, width, height);
2242				}
2243				else {
2244					ctx.translate(x, y);
2245					svg.AspectRatio(ctx,
2246									this.attribute('preserveAspectRatio').value,
2247									width,
2248									this.img.width,
2249									height,
2250									this.img.height,
2251									0,
2252									0);	
2253					ctx.drawImage(this.img, 0, 0);		
2254				}

2255				ctx.restore();
2256			}
2257			
2258			this.getBoundingBox = function() {
2259				var x = this.attribute('x').toPixels('x');
2260				var y = this.attribute('y').toPixels('y');
2261				var width = this.attribute('width').toPixels('x');
2262				var height = this.attribute('height').toPixels('y');
2263				return new svg.BoundingBox(x, y, x + width, y + height);
2264			}
2265		}
2266		svg.Element.image.prototype = new svg.Element.RenderedElementBase;
2267		
2268		// group element
2269		svg.Element.g = function(node) {
2270			this.base = svg.Element.RenderedElementBase;
2271			this.base(node);
2272			
2273			this.getBoundingBox = function() {
2274				var bb = new svg.BoundingBox();
2275				for (var i=0; i<this.children.length; i++) {
2276					bb.addBoundingBox(this.children[i].getBoundingBox());
2277				}
2278				return bb;
2279			};
2280		}
2281		svg.Element.g.prototype = new svg.Element.RenderedElementBase;
2282
2283		// symbol element
2284		svg.Element.symbol = function(node) {
2285			this.base = svg.Element.RenderedElementBase;
2286			this.base(node);
2287			
2288			this.baseSetContext = this.setContext;
2289			this.setContext = function(ctx) {		
2290				this.baseSetContext(ctx);
2291				
2292				// viewbox
2293				if (this.attribute('viewBox').hasValue()) {				
2294					var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
2295					var minX = viewBox[0];
2296					var minY = viewBox[1];
2297					width = viewBox[2];
2298					height = viewBox[3];
2299					
2300					svg.AspectRatio(ctx,
2301									this.attribute('preserveAspectRatio').value, 
2302									this.attribute('width').toPixels('x'),
2303									width,
2304									this.attribute('height').toPixels('y'),
2305									height,
2306									minX,
2307									minY);
2308
2309					svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);						
2310				}
2311			}			
2312		}
2313		svg.Element.symbol.prototype = new svg.Element.RenderedElementBase;		
2314			
2315		// style element
2316		svg.Element.style = function(node) { 
2317			this.base = svg.Element.ElementBase;
2318			this.base(node);
2319			
2320			// text, or spaces then CDATA
2321			var css = ''
2322			for (var i=0; i<node.childNodes.length; i++) {
2323			  css += node.childNodes[i].nodeValue;
2324			}
2325			css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(^[\s]*\/\/.*)/gm, ''); // remove comments
2326			css = svg.compressSpaces(css); // replace whitespace
2327			var cssDefs = css.split('}');
2328			for (var i=0; i<cssDefs.length; i++) {
2329				if (svg.trim(cssDefs[i]) != '') {
2330					var cssDef = cssDefs[i].split('{');

2331					var cssClasses = cssDef[0].split(',');
2332					var cssProps = cssDef[1].split(';');
2333					for (var j=0; j<cssClasses.length; j++) {
2334						var cssClass = svg.trim(cssClasses[j]);
2335						if (cssClass != '') {
2336							var props = {};
2337							for (var k=0; k<cssProps.length; k++) {
2338								var prop = cssProps[k].indexOf(':');
2339								var name = cssProps[k].substr(0, prop);
2340								var value = cssProps[k].substr(prop + 1, cssProps[k].length - prop);
2341								if (name != null && value != null) {
2342									props[svg.trim(name)] = new svg.Property(svg.trim(name), svg.trim(value));
2343								}
2344							}
2345							svg.Styles[cssClass] = props;
2346							if (cssClass == '@font-face') {
2347								var fontFamily = props['font-family'].value.replace(/"/g,'');
2348								var srcs = props['src'].value.split(',');
2349								for (var s=0; s<srcs.length; s++) {
2350									if (srcs[s].indexOf('format("svg")') > 0) {
2351										var urlStart = srcs[s].indexOf('url');
2352										var urlEnd = srcs[s].indexOf(')', urlStart);
2353										var url = srcs[s].substr(urlStart + 5, urlEnd - urlStart - 6);
2354										var doc = svg.parseXml(svg.ajax(url));
2355										var fonts = doc.getElementsByTagName('font');
2356										for (var f=0; f<fonts.length; f++) {
2357											var font = svg.CreateElement(fonts[f]);
2358											svg.Definitions[fontFamily] = font;
2359										}
2360									}
2361								}
2362							}
2363						}
2364					}
2365				}
2366			}
2367		}
2368		svg.Element.style.prototype = new svg.Element.ElementBase;
2369		
2370		// use element 
2371		svg.Element.use = function(node) {
2372			this.base = svg.Element.RenderedElementBase;
2373			this.base(node);
2374			
2375			this.baseSetContext = this.setContext;
2376			this.setContext = function(ctx) {
2377				this.baseSetContext(ctx);
2378				if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').toPixels('x'), 0);
2379				if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').toPixels('y'));
2380			}
2381			
2382			this.getDefinition = function() {
2383				var element = this.getHrefAttribute().getDefinition();
2384				if (this.attribute('width').hasValue()) element.attribute('width', true).value = this.attribute('width').value;
2385				if (this.attribute('height').hasValue()) element.attribute('height', true).value = this.attribute('height').value;
2386				return element;
2387			}
2388			
2389			this.path = function(ctx) {
2390				var element = this.getDefinition();
2391				if (element != null) element.path(ctx);
2392			}
2393			
2394			this.getBoundingBox = function() {
2395				var element = this.getDefinition();
2396				if (element != null) return element.getBoundingBox();
2397			}
2398			
2399			this.renderChildren = function(ctx) {
2400				var element = this.getDefinition();
2401				if (element != null) {
2402					// temporarily detach from parent and render
2403					var oldParent = element.parent;
2404					element.parent = null;
2405					element.render(ctx);
2406					element.parent = oldParent;
2407				}
2408			}
2409		}
2410		svg.Element.use.prototype = new svg.Element.RenderedElementBase;
2411		
2412		// mask element
2413		svg.Element.mask = function(node) {
2414			this.base = svg.Element.ElementBase;
2415			this.base(node);
2416						
2417			this.apply = function(ctx, element) {
2418				// render as temp svg	
2419				var x = this.attribute('x').toPixels('x');
2420				var y = this.attribute('y').toPixels('y');
2421				var width = this.attribute('width').toPixels('x');
2422				var height = this.attribute('height').toPixels('y');
2423				
2424				if (width == 0 && height == 0) {
2425					var bb = new svg.BoundingBox();
2426					for (var i=0; i<this.children.length; i++) {
2427						bb.addBoundingBox(this.children[i].getBoundingBox());
2428					}
2429					var x = Math.floor(bb.x1);
2430					var y = Math.floor(bb.y1);
2431					var width = Math.floor(bb.width());
2432					var	height = Math.floor(bb.height());
2433				}
2434				
2435				// temporarily remove mask to avoid recursion
2436				var mask = element.attribute('mask').value;
2437				element.attribute('mask').value = '';
2438				
2439					var cMask = document.createElement('canvas');
2440					cMask.width = x + width;
2441					cMask.height = y + height;
2442					var maskCtx = cMask.getContext('2d');
2443					this.renderChildren(maskCtx);
2444				
2445					var c = document.createElement('canvas');
2446					c.width = x + width;
2447					c.height = y + height;
2448					var tempCtx = c.getContext('2d');
2449					element.render(tempCtx);
2450					tempCtx.globalCompositeOperation = 'destination-in';
2451					tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat');
2452					tempCtx.fillRect(0, 0, x + width, y + height);
2453					
2454					ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat');
2455					ctx.fillRect(0, 0, x + width, y + height);
2456					
2457				// reassign mask
2458				element.attribute('mask').value = mask;	
2459			}
2460			
2461			this.render = function(ctx) {
2462				// NO RENDER
2463			}
2464		}
2465		svg.Element.mask.prototype = new svg.Element.ElementBase;
2466		
2467		// clip element
2468		svg.Element.clipPath = function(node) {
2469			this.base = svg.Element.ElementBase;
2470			this.base(node);
2471			
2472			this.apply = function(ctx) {
2473				for (var i=0; i<this.children.length; i++) {
2474					var child = this.children[i];
2475					if (typeof(child.path) != 'undefined') {
2476						var transform = null;
2477						if (child.attribute('transform').hasValue()) { 
2478							transform = new svg.Transform(child.attribute('transform').value);
2479							transform.apply(ctx);
2480						}
2481						child.path(ctx);
2482						ctx.clip();
2483						if (transform) { transform.unapply(ctx); }
2484					}
2485				}
2486			}
2487			
2488			this.render = function(ctx) {
2489				// NO RENDER
2490			}
2491		}
2492		svg.Element.clipPath.prototype = new svg.Element.ElementBase;
2493

2494		// filters
2495		svg.Element.filter = function(node) {
2496			this.base = svg.Element.ElementBase;
2497			this.base(node);
2498						
2499			this.apply = function(ctx, element) {
2500				// render as temp svg	
2501				var bb = element.getBoundingBox();
2502				var x = Math.floor(bb.x1);
2503				var y = Math.floor(bb.y1);
2504				var width = Math.floor(bb.width());
2505				var	height = Math.floor(bb.height());
2506
2507				// temporarily remove filter to avoid recursion
2508				var filter = element.style('filter').value;
2509				element.style('filter').value = '';
2510				
2511				var px = 0, py = 0;
2512				for (var i=0; i<this.children.length; i++) {
2513					var efd = this.children[i].extraFilterDistance || 0;
2514					px = Math.max(px, efd);
2515					py = Math.max(py, efd);
2516				}
2517				
2518				var c = document.createElement('canvas');
2519				c.width = width + 2*px;
2520				c.height = height + 2*py;
2521				var tempCtx = c.getContext('2d');
2522				tempCtx.translate(-x + px, -y + py);
2523				element.render(tempCtx);
2524			
2525				// apply filters
2526				for (var i=0; i<this.children.length; i++) {
2527					this.children[i].apply(tempCtx, 0, 0, width + 2*px, height + 2*py);
2528				}
2529				
2530				// render on me
2531				ctx.drawImage(c, 0, 0, width + 2*px, height + 2*py, x - px, y - py, width + 2*px, height + 2*py);
2532				
2533				// reassign filter
2534				element.style('filter', true).value = filter;	
2535			}
2536			
2537			this.render = function(ctx) {
2538				// NO RENDER
2539			}		
2540		}
2541		svg.Element.filter.prototype = new svg.Element.ElementBase;
2542		
2543		svg.Element.feMorphology = function(node) {
2544			this.base = svg.Element.ElementBase;
2545			this.base(node);
2546			
2547			this.apply = function(ctx, x, y, width, height) {
2548				// TODO: implement
2549			}
2550		}
2551		svg.Element.feMorphology.prototype = new svg.Element.ElementBase;
2552		
2553		svg.Element.feColorMatrix = function(node) {
2554			this.base = svg.Element.ElementBase;
2555			this.base(node);
2556			
2557			function imGet(img, x, y, width, height, rgba) {
2558				return img[y*width*4 + x*4 + rgba];
2559			}
2560			
2561			function imSet(img, x, y, width, height, rgba, val) {
2562				img[y*width*4 + x*4 + rgba] = val;
2563			}
2564			
2565			this.apply = function(ctx, x, y, width, height) {
2566				// only supporting grayscale for now per Issue 195, need to extend to all matrix
2567				// assuming x==0 && y==0 for now
2568				var srcData = ctx.getImageData(0, 0, width, height);
2569				for (var y = 0; y < height; y++) {
2570					for (var x = 0; x < width; x++) {
2571						var r = imGet(srcData.data, x, y, width, height, 0);
2572						var g = imGet(srcData.data, x, y, width, height, 1);
2573						var b = imGet(srcData.data, x, y, width, height, 2);
2574						var gray = (r + g + b) / 3;
2575						imSet(srcData.data, x, y, width, height, 0, gray);
2576						imSet(srcData.data, x, y, width, height, 1, gray);
2577						imSet(srcData.data, x, y, width, height, 2, gray);
2578					}
2579				}
2580				ctx.clearRect(0, 0, width, height);
2581				ctx.putImageData(srcData, 0, 0);
2582			}
2583		}
2584		svg.Element.feColorMatrix.prototype = new svg.Element.ElementBase;
2585		
2586		svg.Element.feGaussianBlur = function(node) {
2587			this.base = svg.Element.ElementBase;
2588			this.base(node);
2589
2590			this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue());
2591			this.extraFilterDistance = this.blurRadius;
2592			
2593			this.apply = function(ctx, x, y, width, height) {
2594				if (typeof(stackBlurCanvasRGBA) == 'undefined') {
2595					if (typeof(console) != 'undefined') { console.log('ERROR: StackBlur.js must be included for blur to work'); }
2596					return;
2597				}
2598				
2599				// StackBlur requires canvas be on document
2600				ctx.canvas.id = svg.UniqueId();
2601				ctx.canvas.style.display = 'none';
2602				document.body.appendChild(ctx.canvas);
2603				stackBlurCanvasRGBA(ctx.canvas.id, x, y, width, height, this.blurRadius);
2604				document.body.removeChild(ctx.canvas);
2605			}
2606		}
2607		svg.Element.feGaussianBlur.prototype = new svg.Element.ElementBase;
2608		
2609		// title element, do nothing
2610		svg.Element.title = function(node) {
2611		}
2612		svg.Element.title.prototype = new svg.Element.ElementBase;
2613
2614		// desc element, do nothing
2615		svg.Element.desc = function(node) {
2616		}
2617		svg.Element.desc.prototype = new svg.Element.ElementBase;		
2618		
2619		svg.Element.MISSING = function(node) {
2620			if (typeof(console) != 'undefined') { console.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.'); }
2621		}
2622		svg.Element.MISSING.prototype = new svg.Element.ElementBase;
2623		
2624		// element factory
2625		svg.CreateElement = function(node) {	

2626			var className = node.nodeName.replace(/^[^:]+:/,''); // remove namespace
2627			className = className.replace(/\-/g,''); // remove dashes
2628			var e = null;
2629			if (typeof(svg.Element[className]) != 'undefined') {
2630				e = new svg.Element[className](node);
2631			}
2632			else {
2633				e = new svg.Element.MISSING(node);
2634			}
2635
2636			e.type = node.nodeName;
2637			return e;
2638		}
2639				
2640		// load from url
2641		svg.load = function(ctx, url) {
2642			svg.loadXml(ctx, svg.ajax(url));
2643		}
2644		
2645		// load from xml
2646		svg.loadXml = function(ctx, xml) {
2647			svg.loadXmlDoc(ctx, svg.parseXml(xml));
2648		}
2649		
2650		svg.loadXmlDoc = function(ctx, dom) {
2651			svg.init(ctx);
2652			
2653			var mapXY = function(p) {
2654				var e = ctx.canvas;
2655				while (e) {
2656					p.x -= e.offsetLeft;
2657					p.y -= e.offsetTop;
2658					e = e.offsetParent;
2659				}
2660				if (window.scrollX) p.x += window.scrollX;
2661				if (window.scrollY) p.y += window.scrollY;
2662				return p;
2663			}
2664			
2665			// bind mouse
2666			if (svg.opts['ignoreMouse'] != true) {
2667				ctx.canvas.onclick = function(e) {
2668					var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
2669					svg.Mouse.onclick(p.x, p.y);
2670				};
2671				ctx.canvas.onmousemove = function(e) {
2672					var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
2673					svg.Mouse.onmousemove(p.x, p.y);
2674				};
2675			}
2676		
2677			var e = svg.CreateElement(dom.documentElement);
2678			e.root = true;
2679					
2680			// render loop
2681			var isFirstRender = true;
2682			var draw = function() {
2683				svg.ViewPort.Clear();
2684				if (ctx.canvas.parentNode) svg.ViewPort.SetCurrent(ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight);
2685			
2686				if (svg.opts['ignoreDimensions'] != true) {
2687					// set canvas size
2688					if (e.style('width').hasValue()) {
2689						ctx.canvas.width = e.style('width').toPixels('x');
2690						ctx.canvas.style.width = ctx.canvas.width + 'px';
2691					}
2692					if (e.style('height').hasValue()) {
2693						ctx.canvas.height = e.style('height').toPixels('y');
2694						ctx.canvas.style.height = ctx.canvas.height + 'px';
2695					}
2696				}
2697				var cWidth = ctx.canvas.clientWidth || ctx.canvas.width;
2698				var cHeight = ctx.canvas.clientHeight || ctx.canvas.height;
2699				if (svg.opts['ignoreDimensions'] == true && e.style('width').hasValue() && e.style('height').hasValue()) {
2700					cWidth = e.style('width').toPixels('x');
2701					cHeight = e.style('height').toPixels('y');
2702				}
2703				svg.ViewPort.SetCurrent(cWidth, cHeight);		
2704				
2705				if (svg.opts['offsetX'] != null) e.attribute('x', true).value = svg.opts['offsetX'];
2706				if (svg.opts['offsetY'] != null) e.attribute('y', true).value = svg.opts['offsetY'];
2707				if (svg.opts['scaleWidth'] != null && svg.opts['scaleHeight'] != null) {
2708					var xRatio = 1, yRatio = 1, viewBox = svg.ToNumberArray(e.attribute('viewBox').value);
2709					if (e.attribute('width').hasValue()) xRatio = e.attribute('width').toPixels('x') / svg.opts['scaleWidth'];
2710					else if (!isNaN(viewBox[2])) xRatio = viewBox[2] / svg.opts['scaleWidth'];
2711					if (e.attribute('height').hasValue()) yRatio = e.attribute('height').toPixels('y') / svg.opts['scaleHeight'];
2712					else if (!isNaN(viewBox[3])) yRatio = viewBox[3] / svg.opts['scaleHeight'];
2713					
2714					e.attribute('width', true).value = svg.opts['scaleWidth'];
2715					e.attribute('height', true).value = svg.opts['scaleHeight'];			
2716					e.attribute('viewBox', true).value = '0 0 ' + (cWidth * xRatio) + ' ' + (cHeight * yRatio);
2717					e.attribute('preserveAspectRatio', true).value = 'none';
2718				}
2719			
2720				// clear and render
2721				if (svg.opts['ignoreClear'] != true) {
2722					ctx.clearRect(0, 0, cWidth, cHeight);
2723				}
2724				e.render(ctx);
2725				if (isFirstRender) {
2726					isFirstRender = false;
2727					if (typeof(svg.opts['renderCallback']) == 'function') svg.opts['renderCallback'](dom);
2728				}			
2729			}
2730			
2731			var waitingForImages = true;
2732			if (svg.ImagesLoaded()) {
2733				waitingForImages = false;
2734				draw();
2735			}
2736			svg.intervalID = setInterval(function() { 
2737				var needUpdate = false;
2738				
2739				if (waitingForImages && svg.ImagesLoaded()) {
2740					waitingForImages = false;
2741					needUpdate = true;
2742				}
2743			
2744				// need update from mouse events?
2745				if (svg.opts['ignoreMouse'] != true) {
2746					needUpdate = needUpdate | svg.Mouse.hasEvents();
2747				}
2748			
2749				// need update from animations?
2750				if (svg.opts['ignoreAnimation'] != true) {
2751					for (var i=0; i<svg.Animations.length; i++) {
2752						needUpdate = needUpdate | svg.Animations[i].update(1000 / svg.FRAMERATE);
2753					}
2754				}
2755				
2756				// need update from redraw?
2757				if (typeof(svg.opts['forceRedraw']) == 'function') {
2758					if (svg.opts['forceRedraw']() == true) needUpdate = true;
2759				}
2760				
2761				// render if needed
2762				if (needUpdate) {
2763					draw();				
2764					svg.Mouse.runEvents(); // run and clear our events
2765				}
2766			}, 1000 / svg.FRAMERATE);
2767		}
2768		
2769		svg.stop = function() {
2770			if (svg.intervalID) {
2771				clearInterval(svg.intervalID);
2772			}
2773		}
2774		
2775		svg.Mouse = new (function() {
2776			this.events = [];
2777			this.hasEvents = function() { return this.events.length != 0; }
2778		
2779			this.onclick = function(x, y) {
2780				this.events.push({ type: 'onclick', x: x, y: y, 
2781					run: function(e) { if (e.onclick) e.onclick(); }
2782				});
2783			}
2784			
2785			this.onmousemove = function(x, y) {
2786				this.events.push({ type: 'onmousemove', x: x, y: y,
2787					run: function(e) { if (e.onmousemove) e.onmousemove(); }
2788				});
2789			}			
2790			
2791			this.eventElements = [];
2792			
2793			this.checkPath = function(element, ctx) {
2794				for (var i=0; i<this.events.length; i++) {
2795					var e = this.events[i];
2796					if (ctx.isPointInPath && ctx.isPointInPath(e.x, e.y)) this.eventElements[i] = element;
2797				}
2798			}
2799			
2800			this.checkBoundingBox = function(element, bb) {
2801				for (var i=0; i<this.events.length; i++) {
2802					var e = this.events[i];
2803					if (bb.isPointInBox(e.x, e.y)) this.eventElements[i] = element;
2804				}			
2805			}
2806			
2807			this.runEvents = function() {
2808				svg.ctx.canvas.style.cursor = '';
2809				
2810				for (var i=0; i<this.events.length; i++) {
2811					var e = this.events[i];
2812					var element = this.eventElements[i];
2813					while (element) {
2814						e.run(element);
2815						element = element.parent;
2816					}
2817				}		
2818			
2819				// done running, clear
2820				this.events = []; 
2821				this.eventElements = [];
2822			}
2823		});
2824		
2825		return svg;
2826	}
2827})();
2828
2829if (typeof(CanvasRenderingContext2D) != 'undefined') {
2830	CanvasRenderingContext2D.prototype.drawSvg = function(s, dx, dy, dw, dh) {
2831		canvg(this.canvas, s, { 
2832			ignoreMouse: true, 
2833			ignoreAnimation: true, 
2834			ignoreDimensions: true, 
2835			ignoreClear: true, 
2836			offsetX: dx, 
2837			offsetY: dy, 
2838			scaleWidth: dw, 
2839			scaleHeight: dh
2840		});
2841	}
2842}