text: /** @preserve
   * canvg.js - Javascript SVG parser and renderer on Canvas
   * MIT Licensed
   * Gabe Lerner (gabelerner@gmail.com)
   * http://code.google.com/p/canvg/
   *
   * Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
   */
  (function (global, factory) {
  
      'use strict';
  
      // export as AMD...
      if (typeof define !== 'undefined' && define.amd) {
          define('canvgModule', ['rgbcolor', 'stackblur'], factory);
      }
  
      // ...or as browserify
      else if (typeof module !== 'undefined' && module.exports) {
          module.exports = factory(require('rgbcolor'), require('stackblur'));
      }
  
      global.canvg = factory(global.RGBColor, global.stackBlur);
  
  }(typeof window !== 'undefined' ? window : this, function (RGBColor, stackBlur) {
  
      // canvg(target, s)
      // empty parameters: replace all 'svg' elements on page with 'canvas' elements
      // target: canvas element or the id of a canvas element
      // s: svg string, url to svg file, or xml document
      // opts: optional hash of options
      //		 ignoreMouse: true => ignore mouse events
      //		 ignoreAnimation: true => ignore animations
      //		 ignoreDimensions: true => does not try to resize canvas
      //		 ignoreClear: true => does not clear canvas
      //		 offsetX: int => draws at a x offset
      //		 offsetY: int => draws at a y offset
      //		 scaleWidth: int => scales horizontally to width
      //		 scaleHeight: int => scales vertically to height
      //		 renderCallback: function => will call the function after the first render is completed
      //		 forceRedraw: function => will call the function on every frame, if it returns true, will redraw
      var canvg = function (target, s, opts) {
          // no parameters
          if (target == null && s == null && opts == null) {
              var svgTags = document.querySelectorAll('svg');
              for (var i = 0; i < svgTags.length; i++) {
                  var svgTag = svgTags[i];
                  var c = document.createElement('canvas');
                  c.width = svgTag.clientWidth;
                  c.height = svgTag.clientHeight;
                  svgTag.parentNode.insertBefore(c, svgTag);
                  svgTag.parentNode.removeChild(svgTag);
                  var div = document.createElement('div');
                  div.appendChild(svgTag);
                  canvg(c, div.innerHTML);
              }
              return;
          }
  
          if (typeof target == 'string') {
              target = document.getElementById(target);
          }
  
          // store class on canvas
          if (target.svg != null) target.svg.stop();
          var svg = build(opts || {});
          // on i.e. 8 for flash canvas, we can't assign the property so check for it
          if (!(target.childNodes.length == 1 && target.childNodes[0].nodeName == 'OBJECT')) target.svg = svg;
  
          var ctx = target.getContext('2d');
          if (typeof (s.documentElement) != 'undefined') {
              // load from xml doc
              svg.loadXmlDoc(ctx, s);
          } else if (s.substr(0, 1) == '<') {
              // load from xml string
              svg.loadXml(ctx, s);
          } else {
              // load from url
              svg.load(ctx, s);
          }
      }
  
      // see https://developer.mozilla.org/en-US/docs/Web/API/Element.matches
      var matchesSelector;
      if (typeof (Element.prototype.matches) != 'undefined') {
          matchesSelector = function (node, selector) {
              return node.matches(selector);
          };
      } else if (typeof (Element.prototype.webkitMatchesSelector) != 'undefined') {
          matchesSelector = function (node, selector) {
              return node.webkitMatchesSelector(selector);
          };
      } else if (typeof (Element.prototype.mozMatchesSelector) != 'undefined') {
          matchesSelector = function (node, selector) {
              return node.mozMatchesSelector(selector);
          };
      } else if (typeof (Element.prototype.msMatchesSelector) != 'undefined') {
          matchesSelector = function (node, selector) {
              return node.msMatchesSelector(selector);
          };
      } else if (typeof (Element.prototype.oMatchesSelector) != 'undefined') {
          matchesSelector = function (node, selector) {
              return node.oMatchesSelector(selector);
          };
      } else {
          // requires Sizzle: https://github.com/jquery/sizzle/wiki/Sizzle-Documentation
          // or jQuery: http://jquery.com/download/
          // or Zepto: http://zeptojs.com/#
          // without it, this is a ReferenceError
  
          if (typeof jQuery === 'function' || typeof Zepto === 'function') {
              matchesSelector = function (node, selector) {
                  return $(node).is(selector);
              };
          }
  
          if (typeof matchesSelector === 'undefined') {
              matchesSelector = Sizzle.matchesSelector;
          }
      }
  
      // slightly modified version of https://github.com/keeganstreet/specificity/blob/master/specificity.js
      var attributeRegex = /(\[[^\]]+\])/g;
      var idRegex = /(#[^\s\+>~\.\[:]+)/g;
      var classRegex = /(\.[^\s\+>~\.\[:]+)/g;
      var pseudoElementRegex = /(::[^\s\+>~\.\[:]+|:first-line|:first-letter|:before|:after)/gi;
      var pseudoClassWithBracketsRegex = /(:[\w-]+\([^\)]*\))/gi;
      var pseudoClassRegex = /(:[^\s\+>~\.\[:]+)/g;
      var elementRegex = /([^\s\+>~\.\[:]+)/g;
  
      function getSelectorSpecificity(selector) {
          var typeCount = [0, 0, 0];
          var findMatch = function (regex, type) {
              var matches = selector.match(regex);
              if (matches == null) {
                  return;
              }
              typeCount[type] += matches.length;
              selector = selector.replace(regex, ' ');
          };
  
          selector = selector.replace(/:not\(([^\)]*)\)/g, '     $1 ');
          selector = selector.replace(/{[^]*/gm, ' ');
          findMatch(attributeRegex, 1);
          findMatch(idRegex, 0);
          findMatch(classRegex, 1);
          findMatch(pseudoElementRegex, 2);
          findMatch(pseudoClassWithBracketsRegex, 1);
          findMatch(pseudoClassRegex, 1);
          selector = selector.replace(/[\*\s\+>~]/g, ' ');
          selector = selector.replace(/[#\.]/g, ' ');
          findMatch(elementRegex, 2);
          return typeCount.join('');
      }
  
      function build(opts) {
          var svg = {opts: opts};
  
          svg.FRAMERATE = 30;
          svg.MAX_VIRTUAL_PIXELS = 30000;
  
          svg.log = function (msg) {
          };
          if (svg.opts['log'] == true && typeof (console) != 'undefined') {
              svg.log = function (msg) {
                  console.log(msg);
              };
          }
  
          // globals
          svg.init = function (ctx) {
              var uniqueId = 0;
              svg.UniqueId = function () {
                  uniqueId++;
                  return 'canvg' + uniqueId;
              };
              svg.Definitions = {};
              svg.Styles = {};
              svg.StylesSpecificity = {};
              svg.Animations = [];
              svg.Images = [];
              svg.ctx = ctx;
              svg.ViewPort = new (function () {
                  this.viewPorts = [];
                  this.Clear = function () {
                      this.viewPorts = [];
                  }
                  this.SetCurrent = function (width, height) {
                      this.viewPorts.push({width: width, height: height});
                  }
                  this.RemoveCurrent = function () {
                      this.viewPorts.pop();
                  }
                  this.Current = function () {
                      return this.viewPorts[this.viewPorts.length - 1];
                  }
                  this.width = function () {
                      return this.Current().width;
                  }
                  this.height = function () {
                      return this.Current().height;
                  }
                  this.ComputeSize = function (d) {
                      if (d != null && typeof (d) == 'number') return d;
                      if (d == 'x') return this.width();
                      if (d == 'y') return this.height();
                      return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);
                  }
              });
          }
          svg.init();
  
          // images loaded
          svg.ImagesLoaded = function () {
              for (var i = 0; i < svg.Images.length; i++) {
                  if (!svg.Images[i].loaded) return false;
              }
              return true;
          }
  
          // trim
          svg.trim = function (s) {
              return s.replace(/^\s+|\s+$/g, '');
          }
  
          // compress spaces
          svg.compressSpaces = function (s) {
              return s.replace(/[\s\r\t\n]+/gm, ' ');
          }
  
          // ajax
          svg.ajax = function (url) {
              var AJAX;
              if (window.XMLHttpRequest) {
                  AJAX = new XMLHttpRequest();
              } else {
                  AJAX = new ActiveXObject('Microsoft.XMLHTTP');
              }
              if (AJAX) {
                  AJAX.open('GET', url, false);
                  AJAX.send(null);
                  return AJAX.responseText;
              }
              return null;
          }
  
          // parse xml
          svg.parseXml = function (xml) {
              if (typeof (Windows) != 'undefined' && typeof (Windows.Data) != 'undefined' && typeof (Windows.Data.Xml) != 'undefined') {
                  var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument();
                  var settings = new Windows.Data.Xml.Dom.XmlLoadSettings();
                  settings.prohibitDtd = false;
                  xmlDoc.loadXml(xml, settings);
                  return xmlDoc;
              } else if (window.DOMParser) {
                  var parser = new DOMParser();
                  return parser.parseFromString(xml, 'text/xml');
              } else {
                  xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
                  var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
                  xmlDoc.async = 'false';
                  xmlDoc.loadXML(xml);
                  return xmlDoc;
              }
          }
  
          svg.Property = function (name, value) {
              this.name = name;
              this.value = value;
          }
          svg.Property.prototype.getValue = function () {
              return this.value;
          }
  
          svg.Property.prototype.hasValue = function () {
              return (this.value != null && this.value !== '');
          }
  
          // return the numerical value of the property
          svg.Property.prototype.numValue = function () {
              if (!this.hasValue()) return 0;
  
              var n = parseFloat(this.value);
              if ((this.value + '').match(/%$/)) {
                  n = n / 100.0;
              }
              return n;
          }
  
          svg.Property.prototype.valueOrDefault = function (def) {
              if (this.hasValue()) return this.value;
              return def;
          }
  
          svg.Property.prototype.numValueOrDefault = function (def) {
              if (this.hasValue()) return this.numValue();
              return def;
          }
  
          // color extensions
          // augment the current color value with the opacity
          svg.Property.prototype.addOpacity = function (opacityProp) {
              var newValue = this.value;
              if (opacityProp.value != null && opacityProp.value != '' && typeof (this.value) == 'string') { // can only add opacity to colors, not patterns
                  var color = new RGBColor(this.value);
                  if (color.ok) {
                      newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacityProp.numValue() + ')';
                  }
              }
              return new svg.Property(this.name, newValue);
          }
  
          // definition extensions
          // get the definition from the definitions table
          svg.Property.prototype.getDefinition = function () {
              var name = this.value.match(/#([^\)'"]+)/);
              if (name) {
                  name = name[1];
              }
              if (!name) {
                  name = this.value;
              }
              return svg.Definitions[name];
          }
  
          svg.Property.prototype.isUrlDefinition = function () {
              return this.value.indexOf('url(') == 0
          }
  
          svg.Property.prototype.getFillStyleDefinition = function (e, opacityProp) {
              var def = this.getDefinition();
  
              // gradient
              if (def != null && def.createGradient) {
                  return def.createGradient(svg.ctx, e, opacityProp);
              }
  
              // pattern
              if (def != null && def.createPattern) {
                  if (def.getHrefAttribute().hasValue()) {
                      var pt = def.attribute('patternTransform');
                      def = def.getHrefAttribute().getDefinition();
                      if (pt.hasValue()) {
                          def.attribute('patternTransform', true).value = pt.value;
                      }
                  }
                  return def.createPattern(svg.ctx, e);
              }
  
              return null;
          }
  
          // length extensions
          svg.Property.prototype.getDPI = function (viewPort) {
              return 96.0; // TODO: compute?
          }
  
          svg.Property.prototype.getEM = function (viewPort) {
              var em = 12;
  
              var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
              if (fontSize.hasValue()) em = fontSize.toPixels(viewPort);
  
              return em;
          }
  
          svg.Property.prototype.getUnits = function () {
              var s = this.value + '';
              return s.replace(/[0-9\.\-]/g, '');
          }
  
          // get the length as pixels
          svg.Property.prototype.toPixels = function (viewPort, processPercent) {
              if (!this.hasValue()) return 0;
              var s = this.value + '';
              if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort);
              if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0;
              if (s.match(/px$/)) return this.numValue();
              if (s.match(/pt$/)) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0);
              if (s.match(/pc$/)) return this.numValue() * 15;
              if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54;
              if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4;
              if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort);
              if (s.match(/%$/)) return this.numValue() * svg.ViewPort.ComputeSize(viewPort);
              var n = this.numValue();
              if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort);
              return n;
          }
  
          // time extensions
          // get the time as milliseconds
          svg.Property.prototype.toMilliseconds = function () {
              if (!this.hasValue()) return 0;
              var s = this.value + '';
              if (s.match(/s$/)) return this.numValue() * 1000;
              if (s.match(/ms$/)) return this.numValue();
              return this.numValue();
          }
  
          // angle extensions
          // get the angle as radians
          svg.Property.prototype.toRadians = function () {
              if (!this.hasValue()) return 0;
              var s = this.value + '';
              if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0);
              if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0);
              if (s.match(/rad$/)) return this.numValue();
              return this.numValue() * (Math.PI / 180.0);
          }
  
          // text extensions
          // get the text baseline
          var textBaselineMapping = {
              'baseline': 'alphabetic',
              'before-edge': 'top',
              'text-before-edge': 'top',
              'middle': 'middle',
              'central': 'middle',
              'after-edge': 'bottom',
              'text-after-edge': 'bottom',
              'ideographic': 'ideographic',
              'alphabetic': 'alphabetic',
              'hanging': 'hanging',
              'mathematical': 'alphabetic'
          };
          svg.Property.prototype.toTextBaseline = function () {
              if (!this.hasValue()) return null;
              return textBaselineMapping[this.value];
          }
  
          // fonts
          svg.Font = new (function () {
              this.Styles = 'normal|italic|oblique|inherit';
              this.Variants = 'normal|small-caps|inherit';
              this.Weights = 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit';
  
              this.CreateFont = function (fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
                  var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
                  return {
                      fontFamily: fontFamily || f.fontFamily,
                      fontSize: fontSize || f.fontSize,
                      fontStyle: fontStyle || f.fontStyle,
                      fontWeight: fontWeight || f.fontWeight,
                      fontVariant: fontVariant || f.fontVariant,
                      toString: function () {
                          return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ')
                      }
                  }
              }
  
              var that = this;
              this.Parse = function (s) {
                  var f = {};
                  var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
                  var set = {fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false}
                  var ff = '';
                  for (var i = 0; i < d.length; i++) {
                      if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) {
                          if (d[i] != 'inherit') f.fontStyle = d[i];
                          set.fontStyle = true;
                      } else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) {
                          if (d[i] != 'inherit') f.fontVariant = d[i];
                          set.fontStyle = set.fontVariant = true;
                      } 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;
                      } else if (!set.fontSize) {
                          if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0];
                          set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true;
                      } else {
                          if (d[i] != 'inherit') ff += d[i];
                      }
                  }
                  if (ff != '') f.fontFamily = ff;
                  return f;
              }
          });
  
          // points and paths
          svg.ToNumberArray = function (s) {
              var a = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' ');
              for (var i = 0; i < a.length; i++) {
                  a[i] = parseFloat(a[i]);
              }
              return a;
          }
          svg.Point = function (x, y) {
              this.x = x;
              this.y = y;
          }
          svg.Point.prototype.angleTo = function (p) {
              return Math.atan2(p.y - this.y, p.x - this.x);
          }
  
          svg.Point.prototype.applyTransform = function (v) {
              var xp = this.x * v[0] + this.y * v[2] + v[4];
              var yp = this.x * v[1] + this.y * v[3] + v[5];
              this.x = xp;
              this.y = yp;
          }
  
          svg.CreatePoint = function (s) {
              var a = svg.ToNumberArray(s);
              return new svg.Point(a[0], a[1]);
          }
          svg.CreatePath = function (s) {
              var a = svg.ToNumberArray(s);
              var path = [];
              for (var i = 0; i < a.length; i += 2) {
                  path.push(new svg.Point(a[i], a[i + 1]));
              }
              return path;
          }
  
          // bounding box
          svg.BoundingBox = function (x1, y1, x2, y2) { // pass in initial points if you want
              this.x1 = Number.NaN;
              this.y1 = Number.NaN;
              this.x2 = Number.NaN;
              this.y2 = Number.NaN;
  
              this.x = function () {
                  return this.x1;
              }
              this.y = function () {
                  return this.y1;
              }
              this.width = function () {
                  return this.x2 - this.x1;
              }
              this.height = function () {
                  return this.y2 - this.y1;
              }
  
              this.addPoint = function (x, y) {
                  if (x != null) {
                      if (isNaN(this.x1) || isNaN(this.x2)) {
                          this.x1 = x;
                          this.x2 = x;
                      }
                      if (x < this.x1) this.x1 = x;
                      if (x > this.x2) this.x2 = x;
                  }
  
                  if (y != null) {
                      if (isNaN(this.y1) || isNaN(this.y2)) {
                          this.y1 = y;
                          this.y2 = y;
                      }
                      if (y < this.y1) this.y1 = y;
                      if (y > this.y2) this.y2 = y;
                  }
              }
              this.addX = function (x) {
                  this.addPoint(x, null);
              }
              this.addY = function (y) {
                  this.addPoint(null, y);
              }
  
              this.addBoundingBox = function (bb) {
                  this.addPoint(bb.x1, bb.y1);
                  this.addPoint(bb.x2, bb.y2);
              }
  
              this.addQuadraticCurve = function (p0x, p0y, p1x, p1y, p2x, p2y) {
                  var cp1x = p0x + 2 / 3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
                  var cp1y = p0y + 2 / 3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
                  var cp2x = cp1x + 1 / 3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
                  var cp2y = cp1y + 1 / 3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
                  this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y);
              }
  
              this.addBezierCurve = function (p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
                  // from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
                  var p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y];
                  this.addPoint(p0[0], p0[1]);
                  this.addPoint(p3[0], p3[1]);
  
                  for (i = 0; i <= 1; i++) {
                      var f = function (t) {
                          return Math.pow(1 - t, 3) * p0[i]
                              + 3 * Math.pow(1 - t, 2) * t * p1[i]
                              + 3 * (1 - t) * Math.pow(t, 2) * p2[i]
                              + Math.pow(t, 3) * p3[i];
                      }
  
                      var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
                      var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
                      var c = 3 * p1[i] - 3 * p0[i];
  
                      if (a == 0) {
                          if (b == 0) continue;
                          var t = -c / b;
                          if (0 < t && t < 1) {
                              if (i == 0) this.addX(f(t));
                              if (i == 1) this.addY(f(t));
                          }
                          continue;
                      }
  
                      var b2ac = Math.pow(b, 2) - 4 * c * a;
                      if (b2ac < 0) continue;
                      var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
                      if (0 < t1 && t1 < 1) {
                          if (i == 0) this.addX(f(t1));
                          if (i == 1) this.addY(f(t1));
                      }
                      var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
                      if (0 < t2 && t2 < 1) {
                          if (i == 0) this.addX(f(t2));
                          if (i == 1) this.addY(f(t2));
                      }
                  }
              }
  
              this.isPointInBox = function (x, y) {
                  return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2);
              }
  
              this.addPoint(x1, y1);
              this.addPoint(x2, y2);
          }
  
          // transforms
          svg.Transform = function (v) {
              var that = this;
              this.Type = {}
  
              // translate
              this.Type.translate = function (s) {
                  this.p = svg.CreatePoint(s);
                  this.apply = function (ctx) {
                      ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
                  }
                  this.unapply = function (ctx) {
                      ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0);
                  }
                  this.applyToPoint = function (p) {
                      p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
                  }
              }
  
              // rotate
              this.Type.rotate = function (s) {
                  var a = svg.ToNumberArray(s);
                  this.angle = new svg.Property('angle', a[0]);
                  this.cx = a[1] || 0;
                  this.cy = a[2] || 0;
                  this.apply = function (ctx) {
                      ctx.translate(this.cx, this.cy);
                      ctx.rotate(this.angle.toRadians());
                      ctx.translate(-this.cx, -this.cy);
                  }
                  this.unapply = function (ctx) {
                      ctx.translate(this.cx, this.cy);
                      ctx.rotate(-1.0 * this.angle.toRadians());
                      ctx.translate(-this.cx, -this.cy);
                  }
                  this.applyToPoint = function (p) {
                      var a = this.angle.toRadians();
                      p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
                      p.applyTransform([Math.cos(a), Math.sin(a), -Math.sin(a), Math.cos(a), 0, 0]);
                      p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]);
                  }
              }
  
              this.Type.scale = function (s) {
                  this.p = svg.CreatePoint(s);
                  this.apply = function (ctx) {
                      ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
                  }
                  this.unapply = function (ctx) {
                      ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0);
                  }
                  this.applyToPoint = function (p) {
                      p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]);
                  }
              }
  
              this.Type.matrix = function (s) {
                  this.m = svg.ToNumberArray(s);
                  this.apply = function (ctx) {
                      ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
                  }
                  this.unapply = function (ctx) {
                      var a = this.m[0];
                      var b = this.m[2];
                      var c = this.m[4];
                      var d = this.m[1];
                      var e = this.m[3];
                      var f = this.m[5];
                      var g = 0.0;
                      var h = 0.0;
                      var i = 1.0;
                      var det = 1 / (a * (e * i - f * h) - b * (d * i - f * g) + c * (d * h - e * g));
                      ctx.transform(
                          det * (e * i - f * h),
                          det * (f * g - d * i),
                          det * (c * h - b * i),
                          det * (a * i - c * g),
                          det * (b * f - c * e),
                          det * (c * d - a * f)
                      );
                  }
                  this.applyToPoint = function (p) {
                      p.applyTransform(this.m);
                  }
              }
  
              this.Type.SkewBase = function (s) {
                  this.base = that.Type.matrix;
                  this.base(s);
                  this.angle = new svg.Property('angle', s);
              }
              this.Type.SkewBase.prototype = new this.Type.matrix;
  
              this.Type.skewX = function (s) {
                  this.base = that.Type.SkewBase;
                  this.base(s);
                  this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0];
              }
              this.Type.skewX.prototype = new this.Type.SkewBase;
  
              this.Type.skewY = function (s) {
                  this.base = that.Type.SkewBase;
                  this.base(s);
                  this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0];
              }
              this.Type.skewY.prototype = new this.Type.SkewBase;
  
              this.transforms = [];
  
              this.apply = function (ctx) {
                  for (var i = 0; i < this.transforms.length; i++) {
                      this.transforms[i].apply(ctx);
                  }
              }
  
              this.unapply = function (ctx) {
                  for (var i = this.transforms.length - 1; i >= 0; i--) {
                      this.transforms[i].unapply(ctx);
                  }
              }
  
              this.applyToPoint = function (p) {
                  for (var i = 0; i < this.transforms.length; i++) {
                      this.transforms[i].applyToPoint(p);
                  }
              }
  
              var data = svg.trim(svg.compressSpaces(v)).replace(/\)([a-zA-Z])/g, ') $1').replace(/\)(\s?,\s?)/g, ') ').split(/\s(?=[a-z])/);
              for (var i = 0; i < data.length; i++) {
                  var type = svg.trim(data[i].split('(')[0]);
                  var s = data[i].split('(')[1].replace(')', '');
                  var transform = new this.Type[type](s);
                  transform.type = type;
                  this.transforms.push(transform);
              }
          }
  
          // aspect ratio
          svg.AspectRatio = function (ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
              // aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
              aspectRatio = svg.compressSpaces(aspectRatio);
              aspectRatio = aspectRatio.replace(/^defer\s/, ''); // ignore defer
              var align = aspectRatio.split(' ')[0] || 'xMidYMid';
              var meetOrSlice = aspectRatio.split(' ')[1] || 'meet';
  
              // calculate scale
              var scaleX = width / desiredWidth;
              var scaleY = height / desiredHeight;
              var scaleMin = Math.min(scaleX, scaleY);
              var scaleMax = Math.max(scaleX, scaleY);
              if (meetOrSlice == 'meet') {
                  desiredWidth *= scaleMin;
                  desiredHeight *= scaleMin;
              }
              if (meetOrSlice == 'slice') {
                  desiredWidth *= scaleMax;
                  desiredHeight *= scaleMax;
              }
  
              refX = new svg.Property('refX', refX);
              refY = new svg.Property('refY', refY);
              if (refX.hasValue() && refY.hasValue()) {
                  ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y'));
              } else {
                  // align
                  if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0);
                  if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0);
                  if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width - desiredWidth, 0);
                  if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height - desiredHeight);
              }
  
              // scale
              if (align == 'none') ctx.scale(scaleX, scaleY);
              else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin);
              else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);
  
              // translate
              ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);
          }
  
          // elements
          svg.Element = {}
  
          svg.EmptyProperty = new svg.Property('EMPTY', '');
  
          svg.Element.ElementBase = function (node) {
              this.attributes = {};
              this.styles = {};
              this.stylesSpecificity = {};
              this.children = [];
  
              // get or create attribute
              this.attribute = function (name, createIfNotExists) {
                  var a = this.attributes[name];
                  if (a != null) return a;
  
                  if (createIfNotExists == true) {
                      a = new svg.Property(name, '');
                      this.attributes[name] = a;
                  }
                  return a || svg.EmptyProperty;
              }
  
              this.getHrefAttribute = function () {
                  for (var a in this.attributes) {
                      if (a == 'href' || a.match(/:href$/)) {
                          return this.attributes[a];
                      }
                  }
                  return svg.EmptyProperty;
              }
  
              // get or create style, crawls up node tree
              this.style = function (name, createIfNotExists, skipAncestors) {
                  var s = this.styles[name];
                  if (s != null) return s;
  
                  var a = this.attribute(name);
                  if (a != null && a.hasValue()) {
                      this.styles[name] = a; // move up to me to cache
                      return a;
                  }
  
                  if (skipAncestors != true) {
                      var p = this.parent;
                      if (p != null) {
                          var ps = p.style(name);
                          if (ps != null && ps.hasValue()) {
                              return ps;
                          }
                      }
                  }
  
                  if (createIfNotExists == true) {
                      s = new svg.Property(name, '');
                      this.styles[name] = s;
                  }
                  return s || svg.EmptyProperty;
              }
  
              // base render
              this.render = function (ctx) {
                  // don't render display=none
                  if (this.style('display').value == 'none') return;
  
                  // don't render visibility=hidden
                  if (this.style('visibility').value == 'hidden') return;
  
                  ctx.save();
                  if (this.style('mask').hasValue()) { // mask
                      var mask = this.style('mask').getDefinition();
                      if (mask != null) mask.apply(ctx, this);
                  } else if (this.style('filter').hasValue()) { // filter
                      var filter = this.style('filter').getDefinition();
                      if (filter != null) filter.apply(ctx, this);
                  } else {
                      this.setContext(ctx);
                      this.renderChildren(ctx);
                      this.clearContext(ctx);
                  }
                  ctx.restore();
              }
  
              // base set context
              this.setContext = function (ctx) {
                  // OVERRIDE ME!
              }
  
              // base clear context
              this.clearContext = function (ctx) {
                  // OVERRIDE ME!
              }
  
              // base render children
              this.renderChildren = function (ctx) {
                  for (var i = 0; i < this.children.length; i++) {
                      this.children[i].render(ctx);
                  }
              }
  
              this.addChild = function (childNode, create) {
                  var child = childNode;
                  if (create) child = svg.CreateElement(childNode);
                  child.parent = this;
                  if (child.type != 'title') {
                      this.children.push(child);
                  }
              }
  
              this.addStylesFromStyleDefinition = function () {
                  // add styles
                  for (var selector in svg.Styles) {
                      if (selector[0] != '@' && matchesSelector(node, selector)) {
                          var styles = svg.Styles[selector];
                          var specificity = svg.StylesSpecificity[selector];
                          if (styles != null) {
                              for (var name in styles) {
                                  var existingSpecificity = this.stylesSpecificity[name];
                                  if (typeof (existingSpecificity) == 'undefined') {
                                      existingSpecificity = '000';
                                  }
                                  if (specificity > existingSpecificity) {
                                      this.styles[name] = styles[name];
                                      this.stylesSpecificity[name] = specificity;
                                  }
                              }
                          }
                      }
                  }
              };
  
              if (node != null && node.nodeType == 1) { //ELEMENT_NODE
                  // add attributes
                  for (var i = 0; i < node.attributes.length; i++) {
                      var attribute = node.attributes[i];
                      this.attributes[attribute.nodeName] = new svg.Property(attribute.nodeName, attribute.value);
                  }
  
                  this.addStylesFromStyleDefinition();
  
                  // add inline styles
                  if (this.attribute('style').hasValue()) {
                      var styles = this.attribute('style').value.split(';');
                      for (var i = 0; i < styles.length; i++) {
                          if (svg.trim(styles[i]) != '') {
                              var style = styles[i].split(':');
                              var name = svg.trim(style[0]);
                              var value = svg.trim(style[1]);
                              this.styles[name] = new svg.Property(name, value);
                          }
                      }
                  }
  
                  // add id
                  if (this.attribute('id').hasValue()) {
                      if (svg.Definitions[this.attribute('id').value] == null) {
                          svg.Definitions[this.attribute('id').value] = this;
                      }
                  }
  
                  // add children
                  for (var i = 0; i < node.childNodes.length; i++) {
                      var childNode = node.childNodes[i];
                      if (childNode.nodeType == 1) this.addChild(childNode, true); //ELEMENT_NODE
                      if (this.captureTextNodes && (childNode.nodeType == 3 || childNode.nodeType == 4)) {
                          var text = childNode.value || childNode.text || childNode.textContent || '';
                          if (svg.compressSpaces(text) != '') {
                              this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE
                          }
                      }
                  }
              }
          }
  
          svg.Element.RenderedElementBase = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.setContext = function (ctx) {
                  // fill
                  if (this.style('fill').isUrlDefinition()) {
                      var fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity'));
                      if (fs != null) ctx.fillStyle = fs;
                  } else if (this.style('fill').hasValue()) {
                      var fillStyle = this.style('fill');
                      if (fillStyle.value == 'currentColor') fillStyle.value = this.style('color').value;
                      if (fillStyle.value != 'inherit') ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
                  }
                  if (this.style('fill-opacity').hasValue()) {
                      var fillStyle = new svg.Property('fill', ctx.fillStyle);
                      fillStyle = fillStyle.addOpacity(this.style('fill-opacity'));
                      ctx.fillStyle = fillStyle.value;
                  }
  
                  // stroke
                  if (this.style('stroke').isUrlDefinition()) {
                      var fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity'));
                      if (fs != null) ctx.strokeStyle = fs;
                  } else if (this.style('stroke').hasValue()) {
                      var strokeStyle = this.style('stroke');
                      if (strokeStyle.value == 'currentColor') strokeStyle.value = this.style('color').value;
                      if (strokeStyle.value != 'inherit') ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
                  }
                  if (this.style('stroke-opacity').hasValue()) {
                      var strokeStyle = new svg.Property('stroke', ctx.strokeStyle);
                      strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity'));
                      ctx.strokeStyle = strokeStyle.value;
                  }
                  if (this.style('stroke-width').hasValue()) {
                      var newLineWidth = this.style('stroke-width').toPixels();
                      ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth; // browsers don't respect 0
                  }
                  if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value;
                  if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value;
                  if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value;
                  if (this.style('stroke-dasharray').hasValue() && this.style('stroke-dasharray').value != 'none') {
                      var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value);
                      if (typeof (ctx.setLineDash) != 'undefined') {
                          ctx.setLineDash(gaps);
                      } else if (typeof (ctx.webkitLineDash) != 'undefined') {
                          ctx.webkitLineDash = gaps;
                      } else if (typeof (ctx.mozDash) != 'undefined' && !(gaps.length == 1 && gaps[0] == 0)) {
                          ctx.mozDash = gaps;
                      }
  
                      var offset = this.style('stroke-dashoffset').numValueOrDefault(1);
                      if (typeof (ctx.lineDashOffset) != 'undefined') {
                          ctx.lineDashOffset = offset;
                      } else if (typeof (ctx.webkitLineDashOffset) != 'undefined') {
                          ctx.webkitLineDashOffset = offset;
                      } else if (typeof (ctx.mozDashOffset) != 'undefined') {
                          ctx.mozDashOffset = offset;
                      }
                  }
  
                  // font
                  if (typeof (ctx.font) != 'undefined') {
                      ctx.font = svg.Font.CreateFont(
                          this.style('font-style').value,
                          this.style('font-variant').value,
                          this.style('font-weight').value,
                          this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '',
                          this.style('font-family').value).toString();
                  }
  
                  // transform
                  if (this.style('transform', false, true).hasValue()) {
                      var transform = new svg.Transform(this.style('transform', false, true).value);
                      transform.apply(ctx);
                  }
  
                  // clip
                  if (this.style('clip-path', false, true).hasValue()) {
                      var clip = this.style('clip-path', false, true).getDefinition();
                      if (clip != null) clip.apply(ctx);
                  }
  
                  // opacity
                  if (this.style('opacity').hasValue()) {
                      ctx.globalAlpha = this.style('opacity').numValue();
                  }
              }
          }
          svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase;
  
          svg.Element.PathElementBase = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.path = function (ctx) {
                  if (ctx != null) ctx.beginPath();
                  return new svg.BoundingBox();
              }
  
              this.renderChildren = function (ctx) {
                  this.path(ctx);
                  svg.Mouse.checkPath(this, ctx);
                  if (ctx.fillStyle != '') {
                      if (this.style('fill-rule').valueOrDefault('inherit') != 'inherit') {
                          ctx.fill(this.style('fill-rule').value);
                      } else {
                          ctx.fill();
                      }
                  }
                  if (ctx.strokeStyle != '') ctx.stroke();
  
                  var markers = this.getMarkers();
                  if (markers != null) {
                      if (this.style('marker-start').isUrlDefinition()) {
                          var marker = this.style('marker-start').getDefinition();
                          marker.render(ctx, markers[0][0], markers[0][1]);
                      }
                      if (this.style('marker-mid').isUrlDefinition()) {
                          var marker = this.style('marker-mid').getDefinition();
                          for (var i = 1; i < markers.length - 1; i++) {
                              marker.render(ctx, markers[i][0], markers[i][1]);
                          }
                      }
                      if (this.style('marker-end').isUrlDefinition()) {
                          var marker = this.style('marker-end').getDefinition();
                          marker.render(ctx, markers[markers.length - 1][0], markers[markers.length - 1][1]);
                      }
                  }
              }
  
              this.getBoundingBox = function () {
                  return this.path();
              }
  
              this.getMarkers = function () {
                  return null;
              }
          }
          svg.Element.PathElementBase.prototype = new svg.Element.RenderedElementBase;
  
          // svg element
          svg.Element.svg = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.baseClearContext = this.clearContext;
              this.clearContext = function (ctx) {
                  this.baseClearContext(ctx);
                  svg.ViewPort.RemoveCurrent();
              }
  
              this.baseSetContext = this.setContext;
              this.setContext = function (ctx) {
                  // initial values and defaults
                  ctx.strokeStyle = 'rgba(0,0,0,0)';
                  ctx.lineCap = 'butt';
                  ctx.lineJoin = 'miter';
                  ctx.miterLimit = 4;
                  if (typeof (ctx.font) != 'undefined' && typeof (window.getComputedStyle) != 'undefined') {
                      ctx.font = window.getComputedStyle(ctx.canvas).getPropertyValue('font');
                  }
  
                  this.baseSetContext(ctx);
  
                  // create new view port
                  if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0;
                  if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0;
                  ctx.translate(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y'));
  
                  var width = svg.ViewPort.width();
                  var height = svg.ViewPort.height();
  
                  if (!this.attribute('width').hasValue()) this.attribute('width', true).value = '100%';
                  if (!this.attribute('height').hasValue()) this.attribute('height', true).value = '100%';
                  if (typeof (this.root) == 'undefined') {
                      width = this.attribute('width').toPixels('x');
                      height = this.attribute('height').toPixels('y');
  
                      var x = 0;
                      var y = 0;
                      if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
                          x = -this.attribute('refX').toPixels('x');
                          y = -this.attribute('refY').toPixels('y');
                      }
  
                      if (this.attribute('overflow').valueOrDefault('hidden') != 'visible') {
                          ctx.beginPath();
                          ctx.moveTo(x, y);
                          ctx.lineTo(width, y);
                          ctx.lineTo(width, height);
                          ctx.lineTo(x, height);
                          ctx.closePath();
                          ctx.clip();
                      }
                  }
                  svg.ViewPort.SetCurrent(width, height);
  
                  // viewbox
                  if (this.attribute('viewBox').hasValue()) {
                      var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
                      var minX = viewBox[0];
                      var minY = viewBox[1];
                      width = viewBox[2];
                      height = viewBox[3];
  
                      svg.AspectRatio(ctx,
                          this.attribute('preserveAspectRatio').value,
                          svg.ViewPort.width(),
                          width,
                          svg.ViewPort.height(),
                          height,
                          minX,
                          minY,
                          this.attribute('refX').value,
                          this.attribute('refY').value);
  
                      svg.ViewPort.RemoveCurrent();
                      svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);
                  }
              }
          }
          svg.Element.svg.prototype = new svg.Element.RenderedElementBase;
  
          // rect element
          svg.Element.rect = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              this.path = function (ctx) {
                  var x = this.attribute('x').toPixels('x');
                  var y = this.attribute('y').toPixels('y');
                  var width = this.attribute('width').toPixels('x');
                  var height = this.attribute('height').toPixels('y');
                  var rx = this.attribute('rx').toPixels('x');
                  var ry = this.attribute('ry').toPixels('y');
                  if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
                  if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
                  rx = Math.min(rx, width / 2.0);
                  ry = Math.min(ry, height / 2.0);
                  if (ctx != null) {
                      ctx.beginPath();
                      ctx.moveTo(x + rx, y);
                      ctx.lineTo(x + width - rx, y);
                      ctx.quadraticCurveTo(x + width, y, x + width, y + ry)
                      ctx.lineTo(x + width, y + height - ry);
                      ctx.quadraticCurveTo(x + width, y + height, x + width - rx, y + height)
                      ctx.lineTo(x + rx, y + height);
                      ctx.quadraticCurveTo(x, y + height, x, y + height - ry)
                      ctx.lineTo(x, y + ry);
                      ctx.quadraticCurveTo(x, y, x + rx, y)
                      ctx.closePath();
                  }
  
                  return new svg.BoundingBox(x, y, x + width, y + height);
              }
          }
          svg.Element.rect.prototype = new svg.Element.PathElementBase;
  
          // circle element
          svg.Element.circle = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              this.path = function (ctx) {
                  var cx = this.attribute('cx').toPixels('x');
                  var cy = this.attribute('cy').toPixels('y');
                  var r = this.attribute('r').toPixels();
  
                  if (ctx != null) {
                      ctx.beginPath();
                      ctx.arc(cx, cy, r, 0, Math.PI * 2, true);
                      ctx.closePath();
                  }
  
                  return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r);
              }
          }
          svg.Element.circle.prototype = new svg.Element.PathElementBase;
  
          // ellipse element
          svg.Element.ellipse = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              this.path = function (ctx) {
                  var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
                  var rx = this.attribute('rx').toPixels('x');
                  var ry = this.attribute('ry').toPixels('y');
                  var cx = this.attribute('cx').toPixels('x');
                  var cy = this.attribute('cy').toPixels('y');
  
                  if (ctx != null) {
                      ctx.beginPath();
                      ctx.moveTo(cx, cy - ry);
                      ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy);
                      ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry);
                      ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy);
                      ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
                      ctx.closePath();
                  }
  
                  return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry);
              }
          }
          svg.Element.ellipse.prototype = new svg.Element.PathElementBase;
  
          // line element
          svg.Element.line = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              this.getPoints = function () {
                  return [
                      new svg.Point(this.attribute('x1').toPixels('x'), this.attribute('y1').toPixels('y')),
                      new svg.Point(this.attribute('x2').toPixels('x'), this.attribute('y2').toPixels('y'))];
              }
  
              this.path = function (ctx) {
                  var points = this.getPoints();
  
                  if (ctx != null) {
                      ctx.beginPath();
                      ctx.moveTo(points[0].x, points[0].y);
                      ctx.lineTo(points[1].x, points[1].y);
                  }
  
                  return new svg.BoundingBox(points[0].x, points[0].y, points[1].x, points[1].y);
              }
  
              this.getMarkers = function () {
                  var points = this.getPoints();
                  var a = points[0].angleTo(points[1]);
                  return [[points[0], a], [points[1], a]];
              }
          }
          svg.Element.line.prototype = new svg.Element.PathElementBase;
  
          // polyline element
          svg.Element.polyline = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              this.points = svg.CreatePath(this.attribute('points').value);
              this.path = function (ctx) {
                  var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y);
                  if (ctx != null) {
                      ctx.beginPath();
                      ctx.moveTo(this.points[0].x, this.points[0].y);
                  }
                  for (var i = 1; i < this.points.length; i++) {
                      bb.addPoint(this.points[i].x, this.points[i].y);
                      if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y);
                  }
                  return bb;
              }
  
              this.getMarkers = function () {
                  var markers = [];
                  for (var i = 0; i < this.points.length - 1; i++) {
                      markers.push([this.points[i], this.points[i].angleTo(this.points[i + 1])]);
                  }
                  markers.push([this.points[this.points.length - 1], markers[markers.length - 1][1]]);
                  return markers;
              }
          }
          svg.Element.polyline.prototype = new svg.Element.PathElementBase;
  
          // polygon element
          svg.Element.polygon = function (node) {
              this.base = svg.Element.polyline;
              this.base(node);
  
              this.basePath = this.path;
              this.path = function (ctx) {
                  var bb = this.basePath(ctx);
                  if (ctx != null) {
                      ctx.lineTo(this.points[0].x, this.points[0].y);
                      ctx.closePath();
                  }
                  return bb;
              }
          }
          svg.Element.polygon.prototype = new svg.Element.polyline;
  
          // path element
          svg.Element.path = function (node) {
              this.base = svg.Element.PathElementBase;
              this.base(node);
  
              var d = this.attribute('d').value;
              // TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
              d = d.replace(/,/gm, ' '); // get rid of all commas
              // As the end of a match can also be the start of the next match, we need to run this replace twice.
              for (var i = 0; i < 2; i++)
                  d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm, '$1 $2'); // suffix commands with spaces
              d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // prefix commands with spaces
              d = d.replace(/([0-9])([+\-])/gm, '$1 $2'); // separate digits on +- signs
              // Again, we need to run this twice to find all occurances
              for (var i = 0; i < 2; i++)
                  d = d.replace(/(\.[0-9]*)(\.)/gm, '$1 $2'); // separate digits when they start with a comma
              d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm, '$1 $3 $4 '); // shorthand elliptical arc path syntax
              d = svg.compressSpaces(d); // compress multiple spaces
              d = svg.trim(d);
              this.PathParser = new (function (d) {
                  this.tokens = d.split(' ');
  
                  this.reset = function () {
                      this.i = -1;
                      this.command = '';
                      this.previousCommand = '';
                      this.start = new svg.Point(0, 0);
                      this.control = new svg.Point(0, 0);
                      this.current = new svg.Point(0, 0);
                      this.points = [];
                      this.angles = [];
                  }
  
                  this.isEnd = function () {
                      return this.i >= this.tokens.length - 1;
                  }
  
                  this.isCommandOrEnd = function () {
                      if (this.isEnd()) return true;
                      return this.tokens[this.i + 1].match(/^[A-Za-z]$/) != null;
                  }
  
                  this.isRelativeCommand = function () {
                      switch (this.command) {
                          case 'm':
                          case 'l':
                          case 'h':
                          case 'v':
                          case 'c':
                          case 's':
                          case 'q':
                          case 't':
                          case 'a':
                          case 'z':
                              return true;
                              break;
                      }
                      return false;
                  }
  
                  this.getToken = function () {
                      this.i++;
                      return this.tokens[this.i];
                  }
  
                  this.getScalar = function () {
                      return parseFloat(this.getToken());
                  }
  
                  this.nextCommand = function () {
                      this.previousCommand = this.command;
                      this.command = this.getToken();
                  }
  
                  this.getPoint = function () {
                      var p = new svg.Point(this.getScalar(), this.getScalar());
                      return this.makeAbsolute(p);
                  }
  
                  this.getAsControlPoint = function () {
                      var p = this.getPoint();
                      this.control = p;
                      return p;
                  }
  
                  this.getAsCurrentPoint = function () {
                      var p = this.getPoint();
                      this.current = p;
                      return p;
                  }
  
                  this.getReflectedControlPoint = function () {
                      if (this.previousCommand.toLowerCase() != 'c' &&
                          this.previousCommand.toLowerCase() != 's' &&
                          this.previousCommand.toLowerCase() != 'q' &&
                          this.previousCommand.toLowerCase() != 't') {
                          return this.current;
                      }
  
                      // reflect point
                      var p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y);
                      return p;
                  }
  
                  this.makeAbsolute = function (p) {
                      if (this.isRelativeCommand()) {
                          p.x += this.current.x;
                          p.y += this.current.y;
                      }
                      return p;
                  }
  
                  this.addMarker = function (p, from, priorTo) {
                      // if the last angle isn't filled in because we didn't have this point yet ...
                      if (priorTo != null && this.angles.length > 0 && this.angles[this.angles.length - 1] == null) {
                          this.angles[this.angles.length - 1] = this.points[this.points.length - 1].angleTo(priorTo);
                      }
                      this.addMarkerAngle(p, from == null ? null : from.angleTo(p));
                  }
  
                  this.addMarkerAngle = function (p, a) {
                      this.points.push(p);
                      this.angles.push(a);
                  }
  
                  this.getMarkerPoints = function () {
                      return this.points;
                  }
                  this.getMarkerAngles = function () {
                      for (var i = 0; i < this.angles.length; i++) {
                          if (this.angles[i] == null) {
                              for (var j = i + 1; j < this.angles.length; j++) {
                                  if (this.angles[j] != null) {
                                      this.angles[i] = this.angles[j];
                                      break;
                                  }
                              }
                          }
                      }
                      return this.angles;
                  }
              })(d);
  
              this.path = function (ctx) {
                  var pp = this.PathParser;
                  pp.reset();
  
                  var bb = new svg.BoundingBox();
                  if (ctx != null) ctx.beginPath();
                  while (!pp.isEnd()) {
                      pp.nextCommand();
                      switch (pp.command) {
                          case 'M':
                          case 'm':
                              var p = pp.getAsCurrentPoint();
                              pp.addMarker(p);
                              bb.addPoint(p.x, p.y);
                              if (ctx != null) ctx.moveTo(p.x, p.y);
                              pp.start = pp.current;
                              while (!pp.isCommandOrEnd()) {
                                  var p = pp.getAsCurrentPoint();
                                  pp.addMarker(p, pp.start);
                                  bb.addPoint(p.x, p.y);
                                  if (ctx != null) ctx.lineTo(p.x, p.y);
                              }
                              break;
                          case 'L':
                          case 'l':
                              while (!pp.isCommandOrEnd()) {
                                  var c = pp.current;
                                  var p = pp.getAsCurrentPoint();
                                  pp.addMarker(p, c);
                                  bb.addPoint(p.x, p.y);
                                  if (ctx != null) ctx.lineTo(p.x, p.y);
                              }
                              break;
                          case 'H':
                          case 'h':
                              while (!pp.isCommandOrEnd()) {
                                  var newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(), pp.current.y);
                                  pp.addMarker(newP, pp.current);
                                  pp.current = newP;
                                  bb.addPoint(pp.current.x, pp.current.y);
                                  if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
                              }
                              break;
                          case 'V':
                          case 'v':
                              while (!pp.isCommandOrEnd()) {
                                  var newP = new svg.Point(pp.current.x, (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar());
                                  pp.addMarker(newP, pp.current);
                                  pp.current = newP;
                                  bb.addPoint(pp.current.x, pp.current.y);
                                  if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
                              }
                              break;
                          case 'C':
                          case 'c':
                              while (!pp.isCommandOrEnd()) {
                                  var curr = pp.current;
                                  var p1 = pp.getPoint();
                                  var cntrl = pp.getAsControlPoint();
                                  var cp = pp.getAsCurrentPoint();
                                  pp.addMarker(cp, cntrl, p1);
                                  bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                                  if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                              }
                              break;
                          case 'S':
                          case 's':
                              while (!pp.isCommandOrEnd()) {
                                  var curr = pp.current;
                                  var p1 = pp.getReflectedControlPoint();
                                  var cntrl = pp.getAsControlPoint();
                                  var cp = pp.getAsCurrentPoint();
                                  pp.addMarker(cp, cntrl, p1);
                                  bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                                  if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
                              }
                              break;
                          case 'Q':
                          case 'q':
                              while (!pp.isCommandOrEnd()) {
                                  var curr = pp.current;
                                  var cntrl = pp.getAsControlPoint();
                                  var cp = pp.getAsCurrentPoint();
                                  pp.addMarker(cp, cntrl, cntrl);
                                  bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
                                  if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
                              }
                              break;
                          case 'T':
                          case 't':
                              while (!pp.isCommandOrEnd()) {
                                  var curr = pp.current;
                                  var cntrl = pp.getReflectedControlPoint();
                                  pp.control = cntrl;
                                  var cp = pp.getAsCurrentPoint();
                                  pp.addMarker(cp, cntrl, cntrl);
                                  bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
                                  if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
                              }
                              break;
                          case 'A':
                          case 'a':
                              while (!pp.isCommandOrEnd()) {
                                  var curr = pp.current;
                                  var rx = pp.getScalar();
                                  var ry = pp.getScalar();
                                  var xAxisRotation = pp.getScalar() * (Math.PI / 180.0);
                                  var largeArcFlag = pp.getScalar();
                                  var sweepFlag = pp.getScalar();
                                  var cp = pp.getAsCurrentPoint();
  
                                  // Conversion from endpoint to center parameterization
                                  // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
                                  // x1', y1'
                                  var currp = new svg.Point(
                                      Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0,
                                      -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
                                  );
                                  // adjust radii
                                  var l = Math.pow(currp.x, 2) / Math.pow(rx, 2) + Math.pow(currp.y, 2) / Math.pow(ry, 2);
                                  if (l > 1) {
                                      rx *= Math.sqrt(l);
                                      ry *= Math.sqrt(l);
                                  }
                                  // cx', cy'
                                  var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
                                      ((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))) /
                                      (Math.pow(rx, 2) * Math.pow(currp.y, 2) + Math.pow(ry, 2) * Math.pow(currp.x, 2))
                                  );
                                  if (isNaN(s)) s = 0;
                                  var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
                                  // cx, cy
                                  var centp = new svg.Point(
                                      (curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
                                      (curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
                                  );
                                  // vector magnitude
                                  var m = function (v) {
                                      return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2));
                                  }
                                  // ratio between two vectors
                                  var r = function (u, v) {
                                      return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v))
                                  }
                                  // angle between two vectors
                                  var a = function (u, v) {
                                      return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v));
                                  }
                                  // initial angle
                                  var a1 = a([1, 0], [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]);
                                  // angle delta
                                  var u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry];
                                  var v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry];
                                  var ad = a(u, v);
                                  if (r(u, v) <= -1) ad = Math.PI;
                                  if (r(u, v) >= 1) ad = 0;
  
                                  // for markers
                                  var dir = 1 - sweepFlag ? 1.0 : -1.0;
                                  var ah = a1 + dir * (ad / 2.0);
                                  var halfWay = new svg.Point(
                                      centp.x + rx * Math.cos(ah),
                                      centp.y + ry * Math.sin(ah)
                                  );
                                  pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2);
                                  pp.addMarkerAngle(cp, ah - dir * Math.PI);
  
                                  bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
                                  if (ctx != null) {
                                      var r = rx > ry ? rx : ry;
                                      var sx = rx > ry ? 1 : rx / ry;
                                      var sy = rx > ry ? ry / rx : 1;
  
                                      ctx.translate(centp.x, centp.y);
                                      ctx.rotate(xAxisRotation);
                                      ctx.scale(sx, sy);
                                      ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag);
                                      ctx.scale(1 / sx, 1 / sy);
                                      ctx.rotate(-xAxisRotation);
                                      ctx.translate(-centp.x, -centp.y);
                                  }
                              }
                              break;
                          case 'Z':
                          case 'z':
                              if (ctx != null) ctx.closePath();
                              pp.current = pp.start;
                      }
                  }
  
                  return bb;
              }
  
              this.getMarkers = function () {
                  var points = this.PathParser.getMarkerPoints();
                  var angles = this.PathParser.getMarkerAngles();
  
                  var markers = [];
                  for (var i = 0; i < points.length; i++) {
                      markers.push([points[i], angles[i]]);
                  }
                  return markers;
              }
          }
          svg.Element.path.prototype = new svg.Element.PathElementBase;
  
          // pattern element
          svg.Element.pattern = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.createPattern = function (ctx, element) {
                  var width = this.attribute('width').toPixels('x', true);
                  var height = this.attribute('height').toPixels('y', true);
  
                  // render me using a temporary svg element
                  var tempSvg = new svg.Element.svg();
                  tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
                  tempSvg.attributes['width'] = new svg.Property('width', width + 'px');
                  tempSvg.attributes['height'] = new svg.Property('height', height + 'px');
                  tempSvg.attributes['transform'] = new svg.Property('transform', this.attribute('patternTransform').value);
                  tempSvg.children = this.children;
  
                  var c = document.createElement('canvas');
                  c.width = width;
                  c.height = height;
                  var cctx = c.getContext('2d');
                  if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
                      cctx.translate(this.attribute('x').toPixels('x', true), this.attribute('y').toPixels('y', true));
                  }
                  // render 3x3 grid so when we transform there's no white space on edges
                  for (var x = -1; x <= 1; x++) {
                      for (var y = -1; y <= 1; y++) {
                          cctx.save();
                          tempSvg.attributes['x'] = new svg.Property('x', x * c.width);
                          tempSvg.attributes['y'] = new svg.Property('y', y * c.height);
                          tempSvg.render(cctx);
                          cctx.restore();
                      }
                  }
                  var pattern = ctx.createPattern(c, 'repeat');
                  return pattern;
              }
          }
          svg.Element.pattern.prototype = new svg.Element.ElementBase;
  
          // marker element
          svg.Element.marker = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.baseRender = this.render;
              this.render = function (ctx, point, angle) {
                  ctx.translate(point.x, point.y);
                  if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(angle);
                  if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth);
                  ctx.save();
  
                  // render me using a temporary svg element
                  var tempSvg = new svg.Element.svg();
                  tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
                  tempSvg.attributes['refX'] = new svg.Property('refX', this.attribute('refX').value);
                  tempSvg.attributes['refY'] = new svg.Property('refY', this.attribute('refY').value);
                  tempSvg.attributes['width'] = new svg.Property('width', this.attribute('markerWidth').value);
                  tempSvg.attributes['height'] = new svg.Property('height', this.attribute('markerHeight').value);
                  tempSvg.attributes['fill'] = new svg.Property('fill', this.attribute('fill').valueOrDefault('black'));
                  tempSvg.attributes['stroke'] = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none'));
                  tempSvg.children = this.children;
                  tempSvg.render(ctx);
  
                  ctx.restore();
                  if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(1 / ctx.lineWidth, 1 / ctx.lineWidth);
                  if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(-angle);
                  ctx.translate(-point.x, -point.y);
              }
          }
          svg.Element.marker.prototype = new svg.Element.ElementBase;
  
          // definitions element
          svg.Element.defs = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.render = function (ctx) {
                  // NOOP
              }
          }
          svg.Element.defs.prototype = new svg.Element.ElementBase;
  
          // base for gradients
          svg.Element.GradientBase = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.stops = [];
              for (var i = 0; i < this.children.length; i++) {
                  var child = this.children[i];
                  if (child.type == 'stop') this.stops.push(child);
              }
  
              this.getGradient = function () {
                  // OVERRIDE ME!
              }
  
              this.gradientUnits = function () {
                  return this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
              }
  
              this.attributesToInherit = ['gradientUnits'];
  
              this.inheritStopContainer = function (stopsContainer) {
                  for (var i = 0; i < this.attributesToInherit.length; i++) {
                      var attributeToInherit = this.attributesToInherit[i];
                      if (!this.attribute(attributeToInherit).hasValue() && stopsContainer.attribute(attributeToInherit).hasValue()) {
                          this.attribute(attributeToInherit, true).value = stopsContainer.attribute(attributeToInherit).value;
                      }
                  }
              }
  
              this.createGradient = function (ctx, element, parentOpacityProp) {
                  var stopsContainer = this;
                  if (this.getHrefAttribute().hasValue()) {
                      stopsContainer = this.getHrefAttribute().getDefinition();
                      this.inheritStopContainer(stopsContainer);
                  }
  
                  var addParentOpacity = function (color) {
                      if (parentOpacityProp.hasValue()) {
                          var p = new svg.Property('color', color);
                          return p.addOpacity(parentOpacityProp).value;
                      }
                      return color;
                  };
  
                  var g = this.getGradient(ctx, element);
                  if (g == null) return addParentOpacity(stopsContainer.stops[stopsContainer.stops.length - 1].color);
                  for (var i = 0; i < stopsContainer.stops.length; i++) {
                      g.addColorStop(stopsContainer.stops[i].offset, addParentOpacity(stopsContainer.stops[i].color));
                  }
  
                  if (this.attribute('gradientTransform').hasValue()) {
                      // render as transformed pattern on temporary canvas
                      var rootView = svg.ViewPort.viewPorts[0];
  
                      var rect = new svg.Element.rect();
                      rect.attributes['x'] = new svg.Property('x', -svg.MAX_VIRTUAL_PIXELS / 3.0);
                      rect.attributes['y'] = new svg.Property('y', -svg.MAX_VIRTUAL_PIXELS / 3.0);
                      rect.attributes['width'] = new svg.Property('width', svg.MAX_VIRTUAL_PIXELS);
                      rect.attributes['height'] = new svg.Property('height', svg.MAX_VIRTUAL_PIXELS);
  
                      var group = new svg.Element.g();
                      group.attributes['transform'] = new svg.Property('transform', this.attribute('gradientTransform').value);
                      group.children = [rect];
  
                      var tempSvg = new svg.Element.svg();
                      tempSvg.attributes['x'] = new svg.Property('x', 0);
                      tempSvg.attributes['y'] = new svg.Property('y', 0);
                      tempSvg.attributes['width'] = new svg.Property('width', rootView.width);
                      tempSvg.attributes['height'] = new svg.Property('height', rootView.height);
                      tempSvg.children = [group];
  
                      var c = document.createElement('canvas');
                      c.width = rootView.width;
                      c.height = rootView.height;
                      var tempCtx = c.getContext('2d');
                      tempCtx.fillStyle = g;
                      tempSvg.render(tempCtx);
                      return tempCtx.createPattern(c, 'no-repeat');
                  }
  
                  return g;
              }
          }
          svg.Element.GradientBase.prototype = new svg.Element.ElementBase;
  
          // linear gradient element
          svg.Element.linearGradient = function (node) {
              this.base = svg.Element.GradientBase;
              this.base(node);
  
              this.attributesToInherit.push('x1');
              this.attributesToInherit.push('y1');
              this.attributesToInherit.push('x2');
              this.attributesToInherit.push('y2');
  
              this.getGradient = function (ctx, element) {
                  var bb = this.gradientUnits() == 'objectBoundingBox' ? element.getBoundingBox() : null;
  
                  if (!this.attribute('x1').hasValue()
                      && !this.attribute('y1').hasValue()
                      && !this.attribute('x2').hasValue()
                      && !this.attribute('y2').hasValue()) {
                      this.attribute('x1', true).value = 0;
                      this.attribute('y1', true).value = 0;
                      this.attribute('x2', true).value = 1;
                      this.attribute('y2', true).value = 0;
                  }
  
                  var x1 = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.x() + bb.width() * this.attribute('x1').numValue()
                      : this.attribute('x1').toPixels('x'));
                  var y1 = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.y() + bb.height() * this.attribute('y1').numValue()
                      : this.attribute('y1').toPixels('y'));
                  var x2 = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.x() + bb.width() * this.attribute('x2').numValue()
                      : this.attribute('x2').toPixels('x'));
                  var y2 = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.y() + bb.height() * this.attribute('y2').numValue()
                      : this.attribute('y2').toPixels('y'));
  
                  if (x1 == x2 && y1 == y2) return null;
                  return ctx.createLinearGradient(x1, y1, x2, y2);
              }
          }
          svg.Element.linearGradient.prototype = new svg.Element.GradientBase;
  
          // radial gradient element
          svg.Element.radialGradient = function (node) {
              this.base = svg.Element.GradientBase;
              this.base(node);
  
              this.attributesToInherit.push('cx');
              this.attributesToInherit.push('cy');
              this.attributesToInherit.push('r');
              this.attributesToInherit.push('fx');
              this.attributesToInherit.push('fy');
  
              this.getGradient = function (ctx, element) {
                  var bb = element.getBoundingBox();
  
                  if (!this.attribute('cx').hasValue()) this.attribute('cx', true).value = '50%';
                  if (!this.attribute('cy').hasValue()) this.attribute('cy', true).value = '50%';
                  if (!this.attribute('r').hasValue()) this.attribute('r', true).value = '50%';
  
                  var cx = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.x() + bb.width() * this.attribute('cx').numValue()
                      : this.attribute('cx').toPixels('x'));
                  var cy = (this.gradientUnits() == 'objectBoundingBox'
                      ? bb.y() + bb.height() * this.attribute('cy').numValue()
                      : this.attribute('cy').toPixels('y'));
  
                  var fx = cx;
                  var fy = cy;
                  if (this.attribute('fx').hasValue()) {
                      fx = (this.gradientUnits() == 'objectBoundingBox'
                          ? bb.x() + bb.width() * this.attribute('fx').numValue()
                          : this.attribute('fx').toPixels('x'));
                  }
                  if (this.attribute('fy').hasValue()) {
                      fy = (this.gradientUnits() == 'objectBoundingBox'
                          ? bb.y() + bb.height() * this.attribute('fy').numValue()
                          : this.attribute('fy').toPixels('y'));
                  }
  
                  var r = (this.gradientUnits() == 'objectBoundingBox'
                      ? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
                      : this.attribute('r').toPixels());
  
                  return ctx.createRadialGradient(fx, fy, 0, cx, cy, r);
              }
          }
          svg.Element.radialGradient.prototype = new svg.Element.GradientBase;
  
          // gradient stop element
          svg.Element.stop = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.offset = this.attribute('offset').numValue();
              if (this.offset < 0) this.offset = 0;
              if (this.offset > 1) this.offset = 1;
  
              var stopColor = this.style('stop-color', true);
              if (stopColor.value === '') stopColor.value = '#000';
              if (this.style('stop-opacity').hasValue()) stopColor = stopColor.addOpacity(this.style('stop-opacity'));
              this.color = stopColor.value;
          }
          svg.Element.stop.prototype = new svg.Element.ElementBase;
  
          // animation base element
          svg.Element.AnimateBase = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              svg.Animations.push(this);
  
              this.duration = 0.0;
              this.begin = this.attribute('begin').toMilliseconds();
              this.maxDuration = this.begin + this.attribute('dur').toMilliseconds();
  
              this.getProperty = function () {
                  var attributeType = this.attribute('attributeType').value;
                  var attributeName = this.attribute('attributeName').value;
  
                  if (attributeType == 'CSS') {
                      return this.parent.style(attributeName, true);
                  }
                  return this.parent.attribute(attributeName, true);
              };
  
              this.initialValue = null;
              this.initialUnits = '';
              this.removed = false;
  
              this.calcValue = function () {
                  // OVERRIDE ME!
                  return '';
              }
  
              this.update = function (delta) {
                  // set initial value
                  if (this.initialValue == null) {
                      this.initialValue = this.getProperty().value;
                      this.initialUnits = this.getProperty().getUnits();
                  }
  
                  // if we're past the end time
                  if (this.duration > this.maxDuration) {
                      // loop for indefinitely repeating animations
                      if (this.attribute('repeatCount').value == 'indefinite'
                          || this.attribute('repeatDur').value == 'indefinite') {
                          this.duration = 0.0
                      } else if (this.attribute('fill').valueOrDefault('remove') == 'freeze' && !this.frozen) {
                          this.frozen = true;
                          this.parent.animationFrozen = true;
                          this.parent.animationFrozenValue = this.getProperty().value;
                      } else if (this.attribute('fill').valueOrDefault('remove') == 'remove' && !this.removed) {
                          this.removed = true;
                          this.getProperty().value = this.parent.animationFrozen ? this.parent.animationFrozenValue : this.initialValue;
                          return true;
                      }
                      return false;
                  }
                  this.duration = this.duration + delta;
  
                  // if we're past the begin time
                  var updated = false;
                  if (this.begin < this.duration) {
                      var newValue = this.calcValue(); // tween
  
                      if (this.attribute('type').hasValue()) {
                          // for transform, etc.
                          var type = this.attribute('type').value;
                          newValue = type + '(' + newValue + ')';
                      }
  
                      this.getProperty().value = newValue;
                      updated = true;
                  }
  
                  return updated;
              }
  
              this.from = this.attribute('from');
              this.to = this.attribute('to');
              this.values = this.attribute('values');
              if (this.values.hasValue()) this.values.value = this.values.value.split(';');
  
              // fraction of duration we've covered
              this.progress = function () {
                  var ret = {progress: (this.duration - this.begin) / (this.maxDuration - this.begin)};
                  if (this.values.hasValue()) {
                      var p = ret.progress * (this.values.value.length - 1);
                      var lb = Math.floor(p), ub = Math.ceil(p);
                      ret.from = new svg.Property('from', parseFloat(this.values.value[lb]));
                      ret.to = new svg.Property('to', parseFloat(this.values.value[ub]));
                      ret.progress = (p - lb) / (ub - lb);
                  } else {
                      ret.from = this.from;
                      ret.to = this.to;
                  }
                  return ret;
              }
          }
          svg.Element.AnimateBase.prototype = new svg.Element.ElementBase;
  
          // animate element
          svg.Element.animate = function (node) {
              this.base = svg.Element.AnimateBase;
              this.base(node);
  
              this.calcValue = function () {
                  var p = this.progress();
  
                  // tween value linearly
                  var newValue = p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress;
                  return newValue + this.initialUnits;
              };
          }
          svg.Element.animate.prototype = new svg.Element.AnimateBase;
  
          // animate color element
          svg.Element.animateColor = function (node) {
              this.base = svg.Element.AnimateBase;
              this.base(node);
  
              this.calcValue = function () {
                  var p = this.progress();
                  var from = new RGBColor(p.from.value);
                  var to = new RGBColor(p.to.value);
  
                  if (from.ok && to.ok) {
                      // tween color linearly
                      var r = from.r + (to.r - from.r) * p.progress;
                      var g = from.g + (to.g - from.g) * p.progress;
                      var b = from.b + (to.b - from.b) * p.progress;
                      return 'rgb(' + parseInt(r, 10) + ',' + parseInt(g, 10) + ',' + parseInt(b, 10) + ')';
                  }
                  return this.attribute('from').value;
              };
          }
          svg.Element.animateColor.prototype = new svg.Element.AnimateBase;
  
          // animate transform element
          svg.Element.animateTransform = function (node) {
              this.base = svg.Element.AnimateBase;
              this.base(node);
  
              this.calcValue = function () {
                  var p = this.progress();
  
                  // tween value linearly
                  var from = svg.ToNumberArray(p.from.value);
                  var to = svg.ToNumberArray(p.to.value);
                  var newValue = '';
                  for (var i = 0; i < from.length; i++) {
                      newValue += from[i] + (to[i] - from[i]) * p.progress + ' ';
                  }
                  return newValue;
              };
          }
          svg.Element.animateTransform.prototype = new svg.Element.animate;
  
          // font element
          svg.Element.font = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.horizAdvX = this.attribute('horiz-adv-x').numValue();
  
              this.isRTL = false;
              this.isArabic = false;
              this.fontFace = null;
              this.missingGlyph = null;
              this.glyphs = [];
              for (var i = 0; i < this.children.length; i++) {
                  var child = this.children[i];
                  if (child.type == 'font-face') {
                      this.fontFace = child;
                      if (child.style('font-family').hasValue()) {
                          svg.Definitions[child.style('font-family').value] = this;
                      }
                  } else if (child.type == 'missing-glyph') this.missingGlyph = child;
                  else if (child.type == 'glyph') {
                      if (child.arabicForm != '') {
                          this.isRTL = true;
                          this.isArabic = true;
                          if (typeof (this.glyphs[child.unicode]) == 'undefined') this.glyphs[child.unicode] = [];
                          this.glyphs[child.unicode][child.arabicForm] = child;
                      } else {
                          this.glyphs[child.unicode] = child;
                      }
                  }
              }
          }
          svg.Element.font.prototype = new svg.Element.ElementBase;
  
          // font-face element
          svg.Element.fontface = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.ascent = this.attribute('ascent').value;
              this.descent = this.attribute('descent').value;
              this.unitsPerEm = this.attribute('units-per-em').numValue();
          }
          svg.Element.fontface.prototype = new svg.Element.ElementBase;
  
          // missing-glyph element
          svg.Element.missingglyph = function (node) {
              this.base = svg.Element.path;
              this.base(node);
  
              this.horizAdvX = 0;
          }
          svg.Element.missingglyph.prototype = new svg.Element.path;
  
          // glyph element
          svg.Element.glyph = function (node) {
              this.base = svg.Element.path;
              this.base(node);
  
              this.horizAdvX = this.attribute('horiz-adv-x').numValue();
              this.unicode = this.attribute('unicode').value;
              this.arabicForm = this.attribute('arabic-form').value;
          }
          svg.Element.glyph.prototype = new svg.Element.path;
  
          // text element
          svg.Element.text = function (node) {
              this.captureTextNodes = true;
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.baseSetContext = this.setContext;
              this.setContext = function (ctx) {
                  this.baseSetContext(ctx);
  
                  var textBaseline = this.style('dominant-baseline').toTextBaseline();
                  if (textBaseline == null) textBaseline = this.style('alignment-baseline').toTextBaseline();
                  if (textBaseline != null) ctx.textBaseline = textBaseline;
              }
  
              this.getBoundingBox = function () {
                  var x = this.attribute('x').toPixels('x');
                  var y = this.attribute('y').toPixels('y');
                  var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
                  return new svg.BoundingBox(x, y - fontSize, x + Math.floor(fontSize * 2.0 / 3.0) * this.children[0].getText().length, y);
              }
  
              this.renderChildren = function (ctx) {
                  this.x = this.attribute('x').toPixels('x');
                  this.y = this.attribute('y').toPixels('y');
                  if (this.attribute('dx').hasValue()) this.x += this.attribute('dx').toPixels('x');
                  if (this.attribute('dy').hasValue()) this.y += this.attribute('dy').toPixels('y');
                  this.x += this.getAnchorDelta(ctx, this, 0);
                  for (var i = 0; i < this.children.length; i++) {
                      this.renderChild(ctx, this, i);
                  }
              }
  
              this.getAnchorDelta = function (ctx, parent, startI) {
                  var textAnchor = this.style('text-anchor').valueOrDefault('start');
                  if (textAnchor != 'start') {
                      var width = 0;
                      for (var i = startI; i < parent.children.length; i++) {
                          var child = parent.children[i];
                          if (i > startI && child.attribute('x').hasValue()) break; // new group
                          width += child.measureTextRecursive(ctx);
                      }
                      return -1 * (textAnchor == 'end' ? width : width / 2.0);
                  }
                  return 0;
              }
  
              this.renderChild = function (ctx, parent, i) {
                  var child = parent.children[i];
                  if (child.attribute('x').hasValue()) {
                      child.x = child.attribute('x').toPixels('x') + parent.getAnchorDelta(ctx, parent, i);
                      if (child.attribute('dx').hasValue()) child.x += child.attribute('dx').toPixels('x');
                  } else {
                      if (child.attribute('dx').hasValue()) parent.x += child.attribute('dx').toPixels('x');
                      child.x = parent.x;
                  }
                  parent.x = child.x + child.measureText(ctx);
  
                  if (child.attribute('y').hasValue()) {
                      child.y = child.attribute('y').toPixels('y');
                      if (child.attribute('dy').hasValue()) child.y += child.attribute('dy').toPixels('y');
                  } else {
                      if (child.attribute('dy').hasValue()) parent.y += child.attribute('dy').toPixels('y');
                      child.y = parent.y;
                  }
                  parent.y = child.y;
  
                  child.render(ctx);
  
                  for (var i = 0; i < child.children.length; i++) {
                      parent.renderChild(ctx, child, i);
                  }
              }
          }
          svg.Element.text.prototype = new svg.Element.RenderedElementBase;
  
          // text base
          svg.Element.TextElementBase = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.getGlyph = function (font, text, i) {
                  var c = text[i];
                  var glyph = null;
                  if (font.isArabic) {
                      var arabicForm = 'isolated';
                      if ((i == 0 || text[i - 1] == ' ') && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'terminal';
                      if (i > 0 && text[i - 1] != ' ' && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'medial';
                      if (i > 0 && text[i - 1] != ' ' && (i == text.length - 1 || text[i + 1] == ' ')) arabicForm = 'initial';
                      if (typeof (font.glyphs[c]) != 'undefined') {
                          glyph = font.glyphs[c][arabicForm];
                          if (glyph == null && font.glyphs[c].type == 'glyph') glyph = font.glyphs[c];
                      }
                  } else {
                      glyph = font.glyphs[c];
                  }
                  if (glyph == null) glyph = font.missingGlyph;
                  return glyph;
              }
  
              this.renderChildren = function (ctx) {
                  var customFont = this.parent.style('font-family').getDefinition();
                  if (customFont != null) {
                      var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
                      var fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle);
                      var text = this.getText();
                      if (customFont.isRTL) text = text.split("").reverse().join("");
  
                      var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
                      for (var i = 0; i < text.length; i++) {
                          var glyph = this.getGlyph(customFont, text, i);
                          var scale = fontSize / customFont.fontFace.unitsPerEm;
                          ctx.translate(this.x, this.y);
                          ctx.scale(scale, -scale);
                          var lw = ctx.lineWidth;
                          ctx.lineWidth = ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize;
                          if (fontStyle == 'italic') ctx.transform(1, 0, .4, 1, 0, 0);
                          glyph.render(ctx);
                          if (fontStyle == 'italic') ctx.transform(1, 0, -.4, 1, 0, 0);
                          ctx.lineWidth = lw;
                          ctx.scale(1 / scale, -1 / scale);
                          ctx.translate(-this.x, -this.y);
  
                          this.x += fontSize * (glyph.horizAdvX || customFont.horizAdvX) / customFont.fontFace.unitsPerEm;
                          if (typeof (dx[i]) != 'undefined' && !isNaN(dx[i])) {
                              this.x += dx[i];
                          }
                      }
                      return;
                  }
  
                  if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
                  if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
              }
  
              this.getText = function () {
                  // OVERRIDE ME
              }
  
              this.measureTextRecursive = function (ctx) {
                  var width = this.measureText(ctx);
                  for (var i = 0; i < this.children.length; i++) {
                      width += this.children[i].measureTextRecursive(ctx);
                  }
                  return width;
              }
  
              this.measureText = function (ctx) {
                  var customFont = this.parent.style('font-family').getDefinition();
                  if (customFont != null) {
                      var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
                      var measure = 0;
                      var text = this.getText();
                      if (customFont.isRTL) text = text.split("").reverse().join("");
                      var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
                      for (var i = 0; i < text.length; i++) {
                          var glyph = this.getGlyph(customFont, text, i);
                          measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm;
                          if (typeof (dx[i]) != 'undefined' && !isNaN(dx[i])) {
                              measure += dx[i];
                          }
                      }
                      return measure;
                  }
  
                  var textToMeasure = svg.compressSpaces(this.getText());
                  if (!ctx.measureText) return textToMeasure.length * 10;
  
                  ctx.save();
                  this.setContext(ctx);
                  var width = ctx.measureText(textToMeasure).width;
                  ctx.restore();
                  return width;
              }
          }
          svg.Element.TextElementBase.prototype = new svg.Element.RenderedElementBase;
  
          // tspan
          svg.Element.tspan = function (node) {
              this.captureTextNodes = true;
              this.base = svg.Element.TextElementBase;
              this.base(node);
  
              this.text = svg.compressSpaces(node.value || node.text || node.textContent || '');
              this.getText = function () {
                  // if this node has children, then they own the text
                  if (this.children.length > 0) {
                      return '';
                  }
                  return this.text;
              }
          }
          svg.Element.tspan.prototype = new svg.Element.TextElementBase;
  
          // tref
          svg.Element.tref = function (node) {
              this.base = svg.Element.TextElementBase;
              this.base(node);
  
              this.getText = function () {
                  var element = this.getHrefAttribute().getDefinition();
                  if (element != null) return element.children[0].getText();
              }
          }
          svg.Element.tref.prototype = new svg.Element.TextElementBase;
  
          // a element
          svg.Element.a = function (node) {
              this.base = svg.Element.TextElementBase;
              this.base(node);
  
              this.hasText = node.childNodes.length > 0;
              for (var i = 0; i < node.childNodes.length; i++) {
                  if (node.childNodes[i].nodeType != 3) this.hasText = false;
              }
  
              // this might contain text
              this.text = this.hasText ? node.childNodes[0].value : '';
              this.getText = function () {
                  return this.text;
              }
  
              this.baseRenderChildren = this.renderChildren;
              this.renderChildren = function (ctx) {
                  if (this.hasText) {
                      // render as text element
                      this.baseRenderChildren(ctx);
                      var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
                      svg.Mouse.checkBoundingBox(this, new svg.BoundingBox(this.x, this.y - fontSize.toPixels('y'), this.x + this.measureText(ctx), this.y));
                  } else if (this.children.length > 0) {
                      // render as temporary group
                      var g = new svg.Element.g();
                      g.children = this.children;
                      g.parent = this;
                      g.render(ctx);
                  }
              }
  
              this.onclick = function () {
                  window.open(this.getHrefAttribute().value);
              }
  
              this.onmousemove = function () {
                  svg.ctx.canvas.style.cursor = 'pointer';
              }
          }
          svg.Element.a.prototype = new svg.Element.TextElementBase;
  
          // image element
          svg.Element.image = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              var href = this.getHrefAttribute().value;
              if (href == '') {
                  return;
              }
              var isSvg = href.match(/\.svg$/)
  
              svg.Images.push(this);
              this.loaded = false;
              if (!isSvg) {
                  this.img = document.createElement('img');
                  if (svg.opts['useCORS'] == true) {
                      this.img.crossOrigin = 'Anonymous';
                  }
                  var self = this;
                  this.img.onload = function () {
                      self.loaded = true;
                  }
                  this.img.onerror = function () {
                      svg.log('ERROR: image "' + href + '" not found');
                      self.loaded = true;
                  }
                  this.img.src = href;
              } else {
                  this.img = svg.ajax(href);
                  this.loaded = true;
              }
  
              this.renderChildren = function (ctx) {
                  var x = this.attribute('x').toPixels('x');
                  var y = this.attribute('y').toPixels('y');
  
                  var width = this.attribute('width').toPixels('x');
                  var height = this.attribute('height').toPixels('y');
                  if (width == 0 || height == 0) return;
  
                  ctx.save();
                  if (isSvg) {
                      ctx.drawSvg(this.img, x, y, width, height);
                  } else {
                      ctx.translate(x, y);
                      svg.AspectRatio(ctx,
                          this.attribute('preserveAspectRatio').value,
                          width,
                          this.img.width,
                          height,
                          this.img.height,
                          0,
                          0);
                      ctx.drawImage(this.img, 0, 0);
                  }
                  ctx.restore();
              }
  
              this.getBoundingBox = function () {
                  var x = this.attribute('x').toPixels('x');
                  var y = this.attribute('y').toPixels('y');
                  var width = this.attribute('width').toPixels('x');
                  var height = this.attribute('height').toPixels('y');
                  return new svg.BoundingBox(x, y, x + width, y + height);
              }
          }
          svg.Element.image.prototype = new svg.Element.RenderedElementBase;
  
          // group element
          svg.Element.g = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.getBoundingBox = function () {
                  var bb = new svg.BoundingBox();
                  for (var i = 0; i < this.children.length; i++) {
                      bb.addBoundingBox(this.children[i].getBoundingBox());
                  }
                  return bb;
              };
          }
          svg.Element.g.prototype = new svg.Element.RenderedElementBase;
  
          // symbol element
          svg.Element.symbol = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.render = function (ctx) {
                  // NO RENDER
              };
          }
          svg.Element.symbol.prototype = new svg.Element.RenderedElementBase;
  
          // style element
          svg.Element.style = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              // text, or spaces then CDATA
              var css = ''
              for (var i = 0; i < node.childNodes.length; i++) {
                  css += node.childNodes[i].data;
              }
              css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(^[\s]*\/\/.*)/gm, ''); // remove comments
              css = svg.compressSpaces(css); // replace whitespace
              var cssDefs = css.split('}');
              for (var i = 0; i < cssDefs.length; i++) {
                  if (svg.trim(cssDefs[i]) != '') {
                      var cssDef = cssDefs[i].split('{');
                      var cssClasses = cssDef[0].split(',');
                      var cssProps = cssDef[1].split(';');
                      for (var j = 0; j < cssClasses.length; j++) {
                          var cssClass = svg.trim(cssClasses[j]);
                          if (cssClass != '') {
                              var props = svg.Styles[cssClass] || {};
                              for (var k = 0; k < cssProps.length; k++) {
                                  var prop = cssProps[k].indexOf(':');
                                  var name = cssProps[k].substr(0, prop);
                                  var value = cssProps[k].substr(prop + 1, cssProps[k].length - prop);
                                  if (name != null && value != null) {
                                      props[svg.trim(name)] = new svg.Property(svg.trim(name), svg.trim(value));
                                  }
                              }
                              svg.Styles[cssClass] = props;
                              svg.StylesSpecificity[cssClass] = getSelectorSpecificity(cssClass);
                              if (cssClass == '@font-face') {
                                  var fontFamily = props['font-family'].value.replace(/"/g, '');
                                  var srcs = props['src'].value.split(',');
                                  for (var s = 0; s < srcs.length; s++) {
                                      if (srcs[s].indexOf('format("svg")') > 0) {
                                          var urlStart = srcs[s].indexOf('url');
                                          var urlEnd = srcs[s].indexOf(')', urlStart);
                                          var url = srcs[s].substr(urlStart + 5, urlEnd - urlStart - 6);
                                          var doc = svg.parseXml(svg.ajax(url));
                                          var fonts = doc.getElementsByTagName('font');
                                          for (var f = 0; f < fonts.length; f++) {
                                              var font = svg.CreateElement(fonts[f]);
                                              svg.Definitions[fontFamily] = font;
                                          }
                                      }
                                  }
                              }
                          }
                      }
                  }
              }
          }
          svg.Element.style.prototype = new svg.Element.ElementBase;
  
          // use element
          svg.Element.use = function (node) {
              this.base = svg.Element.RenderedElementBase;
              this.base(node);
  
              this.baseSetContext = this.setContext;
              this.setContext = function (ctx) {
                  this.baseSetContext(ctx);
                  if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').toPixels('x'), 0);
                  if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').toPixels('y'));
              }
  
              var element = this.getHrefAttribute().getDefinition();
  
              this.path = function (ctx) {
                  if (element != null) element.path(ctx);
              }
  
              this.getBoundingBox = function () {
                  if (element != null) return element.getBoundingBox();
              }
  
              this.renderChildren = function (ctx) {
                  if (element != null) {
                      var tempSvg = element;
                      if (element.type == 'symbol') {
                          // render me using a temporary svg element in symbol cases (http://www.w3.org/TR/SVG/struct.html#UseElement)
                          tempSvg = new svg.Element.svg();
                          tempSvg.type = 'svg';
                          tempSvg.attributes['viewBox'] = new svg.Property('viewBox', element.attribute('viewBox').value);
                          tempSvg.attributes['preserveAspectRatio'] = new svg.Property('preserveAspectRatio', element.attribute('preserveAspectRatio').value);
                          tempSvg.attributes['overflow'] = new svg.Property('overflow', element.attribute('overflow').value);
                          tempSvg.children = element.children;
                      }
                      if (tempSvg.type == 'svg') {
                          // if symbol or svg, inherit width/height from me
                          if (this.attribute('width').hasValue()) tempSvg.attributes['width'] = new svg.Property('width', this.attribute('width').value);
                          if (this.attribute('height').hasValue()) tempSvg.attributes['height'] = new svg.Property('height', this.attribute('height').value);
                      }
                      var oldParent = tempSvg.parent;
                      tempSvg.parent = null;
                      tempSvg.render(ctx);
                      tempSvg.parent = oldParent;
                  }
              }
          }
          svg.Element.use.prototype = new svg.Element.RenderedElementBase;
  
          // mask element
          svg.Element.mask = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.apply = function (ctx, element) {
                  // render as temp svg
                  var x = this.attribute('x').toPixels('x');
                  var y = this.attribute('y').toPixels('y');
                  var width = this.attribute('width').toPixels('x');
                  var height = this.attribute('height').toPixels('y');
  
                  if (width == 0 && height == 0) {
                      var bb = new svg.BoundingBox();
                      for (var i = 0; i < this.children.length; i++) {
                          bb.addBoundingBox(this.children[i].getBoundingBox());
                      }
                      var x = Math.floor(bb.x1);
                      var y = Math.floor(bb.y1);
                      var width = Math.floor(bb.width());
                      var height = Math.floor(bb.height());
                  }
  
                  // temporarily remove mask to avoid recursion
                  var mask = element.attribute('mask').value;
                  element.attribute('mask').value = '';
  
                  var cMask = document.createElement('canvas');
                  cMask.width = x + width;
                  cMask.height = y + height;
                  var maskCtx = cMask.getContext('2d');
                  this.renderChildren(maskCtx);
  
                  var c = document.createElement('canvas');
                  c.width = x + width;
                  c.height = y + height;
                  var tempCtx = c.getContext('2d');
                  element.render(tempCtx);
                  tempCtx.globalCompositeOperation = 'destination-in';
                  tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat');
                  tempCtx.fillRect(0, 0, x + width, y + height);
  
                  ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat');
                  ctx.fillRect(0, 0, x + width, y + height);
  
                  // reassign mask
                  element.attribute('mask').value = mask;
              }
  
              this.render = function (ctx) {
                  // NO RENDER
              }
          }
          svg.Element.mask.prototype = new svg.Element.ElementBase;
  
          // clip element
          svg.Element.clipPath = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.apply = function (ctx) {
                  var oldBeginPath = CanvasRenderingContext2D.prototype.beginPath;
                  CanvasRenderingContext2D.prototype.beginPath = function () {
                  };
  
                  var oldClosePath = CanvasRenderingContext2D.prototype.closePath;
                  CanvasRenderingContext2D.prototype.closePath = function () {
                  };
  
                  oldBeginPath.call(ctx);
                  for (var i = 0; i < this.children.length; i++) {
                      var child = this.children[i];
                      if (typeof (child.path) != 'undefined') {
                          var transform = null;
                          if (child.style('transform', false, true).hasValue()) {
                              transform = new svg.Transform(child.style('transform', false, true).value);
                              transform.apply(ctx);
                          }
                          child.path(ctx);
                          CanvasRenderingContext2D.prototype.closePath = oldClosePath;
                          if (transform) {
                              transform.unapply(ctx);
                          }
                      }
                  }
                  oldClosePath.call(ctx);
                  ctx.clip();
  
                  CanvasRenderingContext2D.prototype.beginPath = oldBeginPath;
                  CanvasRenderingContext2D.prototype.closePath = oldClosePath;
              }
  
              this.render = function (ctx) {
                  // NO RENDER
              }
          }
          svg.Element.clipPath.prototype = new svg.Element.ElementBase;
  
          // filters
          svg.Element.filter = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.apply = function (ctx, element) {
                  // render as temp svg
                  var bb = element.getBoundingBox();
                  var x = Math.floor(bb.x1);
                  var y = Math.floor(bb.y1);
                  var width = Math.floor(bb.width());
                  var height = Math.floor(bb.height());
  
                  // temporarily remove filter to avoid recursion
                  var filter = element.style('filter').value;
                  element.style('filter').value = '';
  
                  var px = 0, py = 0;
                  for (var i = 0; i < this.children.length; i++) {
                      var efd = this.children[i].extraFilterDistance || 0;
                      px = Math.max(px, efd);
                      py = Math.max(py, efd);
                  }
  
                  var c = document.createElement('canvas');
                  c.width = width + 2 * px;
                  c.height = height + 2 * py;
                  var tempCtx = c.getContext('2d');
                  tempCtx.translate(-x + px, -y + py);
                  element.render(tempCtx);
  
                  // apply filters
                  for (var i = 0; i < this.children.length; i++) {
                      if (typeof (this.children[i].apply) === 'function') {
                          this.children[i].apply(tempCtx, 0, 0, width + 2 * px, height + 2 * py);
                      }
                  }
  
                  // render on me
                  ctx.drawImage(c, 0, 0, width + 2 * px, height + 2 * py, x - px, y - py, width + 2 * px, height + 2 * py);
  
                  // reassign filter
                  element.style('filter', true).value = filter;
              }
  
              this.render = function (ctx) {
                  // NO RENDER
              }
          }
          svg.Element.filter.prototype = new svg.Element.ElementBase;
  
          svg.Element.feMorphology = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.apply = function (ctx, x, y, width, height) {
                  // TODO: implement
              }
          }
          svg.Element.feMorphology.prototype = new svg.Element.ElementBase;
  
          svg.Element.feComposite = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.apply = function (ctx, x, y, width, height) {
                  // TODO: implement
              }
          }
          svg.Element.feComposite.prototype = new svg.Element.ElementBase;
  
          svg.Element.feColorMatrix = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              var matrix = svg.ToNumberArray(this.attribute('values').value);
              switch (this.attribute('type').valueOrDefault('matrix')) { // http://www.w3.org/TR/SVG/filters.html#feColorMatrixElement
                  case 'saturate':
                      var s = matrix[0];
                      matrix = [0.213 + 0.787 * s, 0.715 - 0.715 * s, 0.072 - 0.072 * s, 0, 0,
                          0.213 - 0.213 * s, 0.715 + 0.285 * s, 0.072 - 0.072 * s, 0, 0,
                          0.213 - 0.213 * s, 0.715 - 0.715 * s, 0.072 + 0.928 * s, 0, 0,
                          0, 0, 0, 1, 0,
                          0, 0, 0, 0, 1];
                      break;
                  case 'hueRotate':
                      var a = matrix[0] * Math.PI / 180.0;
                      var c = function (m1, m2, m3) {
                          return m1 + Math.cos(a) * m2 + Math.sin(a) * m3;
                      };
                      matrix = [c(0.213, 0.787, -0.213), c(0.715, -0.715, -0.715), c(0.072, -0.072, 0.928), 0, 0,
                          c(0.213, -0.213, 0.143), c(0.715, 0.285, 0.140), c(0.072, -0.072, -0.283), 0, 0,
                          c(0.213, -0.213, -0.787), c(0.715, -0.715, 0.715), c(0.072, 0.928, 0.072), 0, 0,
                          0, 0, 0, 1, 0,
                          0, 0, 0, 0, 1];
                      break;
                  case 'luminanceToAlpha':
                      matrix = [0, 0, 0, 0, 0,
                          0, 0, 0, 0, 0,
                          0, 0, 0, 0, 0,
                          0.2125, 0.7154, 0.0721, 0, 0,
                          0, 0, 0, 0, 1];
                      break;
              }
  
              function imGet(img, x, y, width, height, rgba) {
                  return img[y * width * 4 + x * 4 + rgba];
              }
  
              function imSet(img, x, y, width, height, rgba, val) {
                  img[y * width * 4 + x * 4 + rgba] = val;
              }
  
              function m(i, v) {
                  var mi = matrix[i];
                  return mi * (mi < 0 ? v - 255 : v);
              }
  
              this.apply = function (ctx, x, y, width, height) {
                  // assuming x==0 && y==0 for now
                  var srcData = ctx.getImageData(0, 0, width, height);
                  for (var y = 0; y < height; y++) {
                      for (var x = 0; x < width; x++) {
                          var r = imGet(srcData.data, x, y, width, height, 0);
                          var g = imGet(srcData.data, x, y, width, height, 1);
                          var b = imGet(srcData.data, x, y, width, height, 2);
                          var a = imGet(srcData.data, x, y, width, height, 3);
                          imSet(srcData.data, x, y, width, height, 0, m(0, r) + m(1, g) + m(2, b) + m(3, a) + m(4, 1));
                          imSet(srcData.data, x, y, width, height, 1, m(5, r) + m(6, g) + m(7, b) + m(8, a) + m(9, 1));
                          imSet(srcData.data, x, y, width, height, 2, m(10, r) + m(11, g) + m(12, b) + m(13, a) + m(14, 1));
                          imSet(srcData.data, x, y, width, height, 3, m(15, r) + m(16, g) + m(17, b) + m(18, a) + m(19, 1));
                      }
                  }
                  ctx.clearRect(0, 0, width, height);
                  ctx.putImageData(srcData, 0, 0);
              }
          }
          svg.Element.feColorMatrix.prototype = new svg.Element.ElementBase;
  
          svg.Element.feGaussianBlur = function (node) {
              this.base = svg.Element.ElementBase;
              this.base(node);
  
              this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue());
              this.extraFilterDistance = this.blurRadius;
  
              this.apply = function (ctx, x, y, width, height) {
                  if (typeof (stackBlur.canvasRGBA) == 'undefined') {
                      svg.log('ERROR: StackBlur.js must be included for blur to work');
                      return;
                  }
  
                  // StackBlur requires canvas be on document
                  ctx.canvas.id = svg.UniqueId();
                  ctx.canvas.style.display = 'none';
                  document.body.appendChild(ctx.canvas);
                  stackBlur.canvasRGBA(ctx.canvas.id, x, y, width, height, this.blurRadius);
                  document.body.removeChild(ctx.canvas);
              }
          }
          svg.Element.feGaussianBlur.prototype = new svg.Element.ElementBase;
  
          // title element, do nothing
          svg.Element.title = function (node) {
          }
          svg.Element.title.prototype = new svg.Element.ElementBase;
  
          // desc element, do nothing
          svg.Element.desc = function (node) {
          }
          svg.Element.desc.prototype = new svg.Element.ElementBase;
  
          svg.Element.MISSING = function (node) {
              svg.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.');
          }
          svg.Element.MISSING.prototype = new svg.Element.ElementBase;
  
          // element factory
          svg.CreateElement = function (node) {
              var className = node.nodeName.replace(/^[^:]+:/, ''); // remove namespace
              className = className.replace(/\-/g, ''); // remove dashes
              var e = null;
              if (typeof (svg.Element[className]) != 'undefined') {
                  e = new svg.Element[className](node);
              } else {
                  e = new svg.Element.MISSING(node);
              }
  
              e.type = node.nodeName;
              return e;
          }
  
          // load from url
          svg.load = function (ctx, url) {
              svg.loadXml(ctx, svg.ajax(url));
          }
  
          // load from xml
          svg.loadXml = function (ctx, xml) {
              svg.loadXmlDoc(ctx, svg.parseXml(xml));
          }
  
          svg.loadXmlDoc = function (ctx, dom) {
              svg.init(ctx);
  
              var mapXY = function (p) {
                  var e = ctx.canvas;
                  while (e) {
                      p.x -= e.offsetLeft;
                      p.y -= e.offsetTop;
                      e = e.offsetParent;
                  }
                  if (window.scrollX) p.x += window.scrollX;
                  if (window.scrollY) p.y += window.scrollY;
                  return p;
              }
  
              // bind mouse
              if (svg.opts['ignoreMouse'] != true) {
                  ctx.canvas.onclick = function (e) {
                      var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
                      svg.Mouse.onclick(p.x, p.y);
                  };
                  ctx.canvas.onmousemove = function (e) {
                      var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
                      svg.Mouse.onmousemove(p.x, p.y);
                  };
              }
  
              var e = svg.CreateElement(dom.documentElement);
              e.root = true;
              e.addStylesFromStyleDefinition();
  
              // render loop
              var isFirstRender = true;
              var draw = function () {
                  svg.ViewPort.Clear();
                  if (ctx.canvas.parentNode) svg.ViewPort.SetCurrent(ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight);
  
                  if (svg.opts['ignoreDimensions'] != true) {
                      // set canvas size
                      if (e.style('width').hasValue()) {
                          ctx.canvas.width = e.style('width').toPixels('x');
                          ctx.canvas.style.width = ctx.canvas.width + 'px';
                      }
                      if (e.style('height').hasValue()) {
                          ctx.canvas.height = e.style('height').toPixels('y');
                          ctx.canvas.style.height = ctx.canvas.height + 'px';
                      }
                  }
                  var cWidth = ctx.canvas.clientWidth || ctx.canvas.width;
                  var cHeight = ctx.canvas.clientHeight || ctx.canvas.height;
                  if (svg.opts['ignoreDimensions'] == true && e.style('width').hasValue() && e.style('height').hasValue()) {
                      cWidth = e.style('width').toPixels('x');
                      cHeight = e.style('height').toPixels('y');
                  }
                  svg.ViewPort.SetCurrent(cWidth, cHeight);
  
                  if (svg.opts['offsetX'] != null) e.attribute('x', true).value = svg.opts['offsetX'];
                  if (svg.opts['offsetY'] != null) e.attribute('y', true).value = svg.opts['offsetY'];
                  if (svg.opts['scaleWidth'] != null || svg.opts['scaleHeight'] != null) {
                      var xRatio = null, yRatio = null, viewBox = svg.ToNumberArray(e.attribute('viewBox').value);
  
                      if (svg.opts['scaleWidth'] != null) {
                          if (e.attribute('width').hasValue()) xRatio = e.attribute('width').toPixels('x') / svg.opts['scaleWidth'];
                          else if (!isNaN(viewBox[2])) xRatio = viewBox[2] / svg.opts['scaleWidth'];
                      }
  
                      if (svg.opts['scaleHeight'] != null) {
                          if (e.attribute('height').hasValue()) yRatio = e.attribute('height').toPixels('y') / svg.opts['scaleHeight'];
                          else if (!isNaN(viewBox[3])) yRatio = viewBox[3] / svg.opts['scaleHeight'];
                      }
  
                      if (xRatio == null) {
                          xRatio = yRatio;
                      }
                      if (yRatio == null) {
                          yRatio = xRatio;
                      }
  
                      e.attribute('width', true).value = svg.opts['scaleWidth'];
                      e.attribute('height', true).value = svg.opts['scaleHeight'];
                      e.style('transform', true, true).value += ' scale(' + (1.0 / xRatio) + ',' + (1.0 / yRatio) + ')';
                  }
  
                  // clear and render
                  if (svg.opts['ignoreClear'] != true) {
                      ctx.clearRect(0, 0, cWidth, cHeight);
                  }
                  e.render(ctx);
                  if (isFirstRender) {
                      isFirstRender = false;
                      if (typeof (svg.opts['renderCallback']) == 'function') svg.opts['renderCallback'](dom);
                  }
              }
  
              var waitingForImages = true;
              if (svg.ImagesLoaded()) {
                  waitingForImages = false;
                  draw();
              }
              svg.intervalID = setInterval(function () {
                  var needUpdate = false;
  
                  if (waitingForImages && svg.ImagesLoaded()) {
                      waitingForImages = false;
                      needUpdate = true;
                  }
  
                  // need update from mouse events?
                  if (svg.opts['ignoreMouse'] != true) {
                      needUpdate = needUpdate | svg.Mouse.hasEvents();
                  }
  
                  // need update from animations?
                  if (svg.opts['ignoreAnimation'] != true) {
                      for (var i = 0; i < svg.Animations.length; i++) {
                          needUpdate = needUpdate | svg.Animations[i].update(1000 / svg.FRAMERATE);
                      }
                  }
  
                  // need update from redraw?
                  if (typeof (svg.opts['forceRedraw']) == 'function') {
                      if (svg.opts['forceRedraw']() == true) needUpdate = true;
                  }
  
                  // render if needed
                  if (needUpdate) {
                      draw();
                      svg.Mouse.runEvents(); // run and clear our events
                  }
              }, 1000 / svg.FRAMERATE);
          }
  
          svg.stop = function () {
              if (svg.intervalID) {
                  clearInterval(svg.intervalID);
              }
          }
  
          svg.Mouse = new (function () {
              this.events = [];
              this.hasEvents = function () {
                  return this.events.length != 0;
              }
  
              this.onclick = function (x, y) {
                  this.events.push({
                      type: 'onclick', x: x, y: y,
                      run: function (e) {
                          if (e.onclick) e.onclick();
                      }
                  });
              }
  
              this.onmousemove = function (x, y) {
                  this.events.push({
                      type: 'onmousemove', x: x, y: y,
                      run: function (e) {
                          if (e.onmousemove) e.onmousemove();
                      }
                  });
              }
  
              this.eventElements = [];
  
              this.checkPath = function (element, ctx) {
                  for (var i = 0; i < this.events.length; i++) {
                      var e = this.events[i];
                      if (ctx.isPointInPath && ctx.isPointInPath(e.x, e.y)) this.eventElements[i] = element;
                  }
              }
  
              this.checkBoundingBox = function (element, bb) {
                  for (var i = 0; i < this.events.length; i++) {
                      var e = this.events[i];
                      if (bb.isPointInBox(e.x, e.y)) this.eventElements[i] = element;
                  }
              }
  
              this.runEvents = function () {
                  svg.ctx.canvas.style.cursor = '';
  
                  for (var i = 0; i < this.events.length; i++) {
                      var e = this.events[i];
                      var element = this.eventElements[i];
                      while (element) {
                          e.run(element);
                          element = element.parent;
                      }
                  }
  
                  // done running, clear
                  this.events = [];
                  this.eventElements = [];
              }
          });
  
          return svg;
      }
  
      if (typeof (CanvasRenderingContext2D) != 'undefined') {
          CanvasRenderingContext2D.prototype.drawSvg = function (s, dx, dy, dw, dh) {
              canvg(this.canvas, s, {
                  ignoreMouse: true,
                  ignoreAnimation: true,
                  ignoreDimensions: true,
                  ignoreClear: true,
                  offsetX: dx,
                  offsetY: dy,
                  scaleWidth: dw,
                  scaleHeight: dh
              });
          }
      }
  
      return canvg;
  
  }));
  