ShowEasy/EuroTran/WebApp/Ueditor/third-party/highcharts/modules/canvas-tools.src.js

/**
 * @license A class to parse color values
 * @author Stoyan Stefanov <sstoo@gmail.com>
 * @link   http://www.phpied.com/rgb-color-parser-in-javascript/
 * Use it if you like it
 *
 */
function RGBColor(color_string) {
    this.ok = false;

    // strip any leading #
    if (color_string.charAt(0) == '#') { // remove # if any
        color_string = color_string.substr(1, 6);
    }

    color_string = color_string.replace(/ /g, '');
    color_string = color_string.toLowerCase();

    // before getting into regexps, try simple matches
    // and overwrite the input
    var simple_colors = {
        aliceblue: 'f0f8ff',
        antiquewhite: 'faebd7',
        aqua: '00ffff',
        aquamarine: '7fffd4',
        azure: 'f0ffff',
        beige: 'f5f5dc',
        bisque: 'ffe4c4',
        black: '000000',
        blanchedalmond: 'ffebcd',
        blue: '0000ff',
        blueviolet: '8a2be2',
        brown: 'a52a2a',
        burlywood: 'deb887',
        cadetblue: '5f9ea0',
        chartreuse: '7fff00',
        chocolate: 'd2691e',
        coral: 'ff7f50',
        cornflowerblue: '6495ed',
        cornsilk: 'fff8dc',
        crimson: 'dc143c',
        cyan: '00ffff',
        darkblue: '00008b',
        darkcyan: '008b8b',
        darkgoldenrod: 'b8860b',
        darkgray: 'a9a9a9',
        darkgreen: '006400',
        darkkhaki: 'bdb76b',
        darkmagenta: '8b008b',
        darkolivegreen: '556b2f',
        darkorange: 'ff8c00',
        darkorchid: '9932cc',
        darkred: '8b0000',
        darksalmon: 'e9967a',
        darkseagreen: '8fbc8f',
        darkslateblue: '483d8b',
        darkslategray: '2f4f4f',
        darkturquoise: '00ced1',
        darkviolet: '9400d3',
        deeppink: 'ff1493',
        deepskyblue: '00bfff',
        dimgray: '696969',
        dodgerblue: '1e90ff',
        feldspar: 'd19275',
        firebrick: 'b22222',
        floralwhite: 'fffaf0',
        forestgreen: '228b22',
        fuchsia: 'ff00ff',
        gainsboro: 'dcdcdc',
        ghostwhite: 'f8f8ff',
        gold: 'ffd700',
        goldenrod: 'daa520',
        gray: '808080',
        green: '008000',
        greenyellow: 'adff2f',
        honeydew: 'f0fff0',
        hotpink: 'ff69b4',
        indianred: 'cd5c5c',
        indigo: '4b0082',
        ivory: 'fffff0',
        khaki: 'f0e68c',
        lavender: 'e6e6fa',
        lavenderblush: 'fff0f5',
        lawngreen: '7cfc00',
        lemonchiffon: 'fffacd',
        lightblue: 'add8e6',
        lightcoral: 'f08080',
        lightcyan: 'e0ffff',
        lightgoldenrodyellow: 'fafad2',
        lightgrey: 'd3d3d3',
        lightgreen: '90ee90',
        lightpink: 'ffb6c1',
        lightsalmon: 'ffa07a',
        lightseagreen: '20b2aa',
        lightskyblue: '87cefa',
        lightslateblue: '8470ff',
        lightslategray: '778899',
        lightsteelblue: 'b0c4de',
        lightyellow: 'ffffe0',
        lime: '00ff00',
        limegreen: '32cd32',
        linen: 'faf0e6',
        magenta: 'ff00ff',
        maroon: '800000',
        mediumaquamarine: '66cdaa',
        mediumblue: '0000cd',
        mediumorchid: 'ba55d3',
        mediumpurple: '9370d8',
        mediumseagreen: '3cb371',
        mediumslateblue: '7b68ee',
        mediumspringgreen: '00fa9a',
        mediumturquoise: '48d1cc',
        mediumvioletred: 'c71585',
        midnightblue: '191970',
        mintcream: 'f5fffa',
        mistyrose: 'ffe4e1',
        moccasin: 'ffe4b5',
        navajowhite: 'ffdead',
        navy: '000080',
        oldlace: 'fdf5e6',
        olive: '808000',
        olivedrab: '6b8e23',
        orange: 'ffa500',
        orangered: 'ff4500',
        orchid: 'da70d6',
        palegoldenrod: 'eee8aa',
        palegreen: '98fb98',
        paleturquoise: 'afeeee',
        palevioletred: 'd87093',
        papayawhip: 'ffefd5',
        peachpuff: 'ffdab9',
        peru: 'cd853f',
        pink: 'ffc0cb',
        plum: 'dda0dd',
        powderblue: 'b0e0e6',
        purple: '800080',
        red: 'ff0000',
        rosybrown: 'bc8f8f',
        royalblue: '4169e1',
        saddlebrown: '8b4513',
        salmon: 'fa8072',
        sandybrown: 'f4a460',
        seagreen: '2e8b57',
        seashell: 'fff5ee',
        sienna: 'a0522d',
        silver: 'c0c0c0',
        skyblue: '87ceeb',
        slateblue: '6a5acd',
        slategray: '708090',
        snow: 'fffafa',
        springgreen: '00ff7f',
        steelblue: '4682b4',
        tan: 'd2b48c',
        teal: '008080',
        thistle: 'd8bfd8',
        tomato: 'ff6347',
        turquoise: '40e0d0',
        violet: 'ee82ee',
        violetred: 'd02090',
        wheat: 'f5deb3',
        white: 'ffffff',
        whitesmoke: 'f5f5f5',
        yellow: 'ffff00',
        yellowgreen: '9acd32'
    };
    for (var key in simple_colors) {
        if (color_string == key) {
            color_string = simple_colors[key];
        }
    }
    // emd of simple type-in colors

    // array of color definition objects
    var color_defs = [
        {
            re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
            example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
            process: function (bits) {
                return [
                    parseInt(bits[1]),
                    parseInt(bits[2]),
                    parseInt(bits[3])
                ];
            }
        },
        {
            re: /^(\w{2})(\w{2})(\w{2})$/,
            example: ['#00ff00', '336699'],
            process: function (bits) {
                return [
                    parseInt(bits[1], 16),
                    parseInt(bits[2], 16),
                    parseInt(bits[3], 16)
                ];
            }
        },
        {
            re: /^(\w{1})(\w{1})(\w{1})$/,
            example: ['#fb0', 'f0f'],
            process: function (bits) {
                return [
                    parseInt(bits[1] + bits[1], 16),
                    parseInt(bits[2] + bits[2], 16),
                    parseInt(bits[3] + bits[3], 16)
                ];
            }
        }
    ];

    // search through the definitions to find a match
    for (var i = 0; i < color_defs.length; i++) {
        var re = color_defs[i].re;
        var processor = color_defs[i].process;
        var bits = re.exec(color_string);
        if (bits) {
            channels = processor(bits);
            this.r = channels[0];
            this.g = channels[1];
            this.b = channels[2];
            this.ok = true;
        }
    }

    // validate/cleanup values
    this.r = (this.r < 0 || isNaN(this.r)) ? 0 : ((this.r > 255) ? 255 : this.r);
    this.g = (this.g < 0 || isNaN(this.g)) ? 0 : ((this.g > 255) ? 255 : this.g);
    this.b = (this.b < 0 || isNaN(this.b)) ? 0 : ((this.b > 255) ? 255 : this.b);

    // some getters
    this.toRGB = function () {
        return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
    }
    this.toHex = function () {
        var r = this.r.toString(16);
        var g = this.g.toString(16);
        var b = this.b.toString(16);
        if (r.length == 1) r = '0' + r;
        if (g.length == 1) g = '0' + g;
        if (b.length == 1) b = '0' + b;
        return '#' + r + g + b;
    }

    // help
    this.getHelpXML = function () {
        var examples = new Array();
        // add regexps
        for (var i = 0; i < color_defs.length; i++) {
            var example = color_defs[i].example;
            for (var j = 0; j < example.length; j++) {
                examples[examples.length] = example[j];
            }
        }
        // add type-in colors
        for (var sc in simple_colors) {
            examples[examples.length] = sc;
        }

        var xml = document.createElement('ul');
        xml.setAttribute('id', 'rgbcolor-examples');
        for (var i = 0; i < examples.length; i++) {
            try {
                var list_item = document.createElement('li');
                var list_color = new RGBColor(examples[i]);
                var example_div = document.createElement('div');
                example_div.style.cssText =
                    'margin: 3px; '
                    + 'border: 1px solid black; '
                    + 'background:' + list_color.toHex() + '; '
                    + 'color:' + list_color.toHex()
                    ;
                example_div.appendChild(document.createTextNode('test'));
                var list_item_value = document.createTextNode(
                    ' ' + examples[i] + ' -> ' + list_color.toRGB() + ' -> ' + list_color.toHex()
                );
                list_item.appendChild(example_div);
                list_item.appendChild(list_item_value);
                xml.appendChild(list_item);
            } catch (e) { }
        }
        return xml;
    }
}

/**
 * @license 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/
 *
 */
if (!window.console) {
    window.console = {};
    window.console.log = function (str) { };
    window.console.dir = function (str) { };
}

if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (obj) {
        for (var i = 0; i < this.length; i++) {
            if (this[i] == obj) {
                return i;
            }
        }
        return -1;
    }
}

(function () {
    // 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
    this.canvg = function (target, s, opts) {
        // no parameters
        if (target == null && s == null && opts == null) {
            var svgTags = document.getElementsByTagName('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;
        }
        opts = opts || {};

        if (typeof target == 'string') {
            target = document.getElementById(target);
        }

        // reuse class per canvas
        var svg;
        if (target.svg == null) {
            svg = build();
            target.svg = svg;
        }
        else {
            svg = target.svg;
            svg.stop();
        }
        svg.opts = opts;

        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);
        }
    }

    function build() {
        var svg = {};

        svg.FRAMERATE = 30;
        svg.MAX_VIRTUAL_PIXELS = 30000;

        // globals
        svg.init = function (ctx) {
            svg.Definitions = {};
            svg.Styles = {};
            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 (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;

            this.hasValue = function () {
                return (this.value != null && this.value !== '');
            }

            // return the numerical value of the property
            this.numValue = function () {
                if (!this.hasValue()) return 0;

                var n = parseFloat(this.value);
                if ((this.value + '').match(/%$/)) {
                    n = n / 100.0;
                }
                return n;
            }

            this.valueOrDefault = function (def) {
                if (this.hasValue()) return this.value;
                return def;
            }

            this.numValueOrDefault = function (def) {
                if (this.hasValue()) return this.numValue();
                return def;
            }

            /* EXTENSIONS */
            var that = this;

            // color extensions
            this.Color = {
                // augment the current color value with the opacity
                addOpacity: function (opacity) {
                    var newValue = that.value;
                    if (opacity != null && opacity != '') {
                        var color = new RGBColor(that.value);
                        if (color.ok) {
                            newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacity + ')';
                        }
                    }
                    return new svg.Property(that.name, newValue);
                }
            }

            // definition extensions
            this.Definition = {
                // get the definition from the definitions table
                getDefinition: function () {
                    var name = that.value.replace(/^(url\()?#([^\)]+)\)?$/, '$2');
                    return svg.Definitions[name];
                },

                isUrl: function () {
                    return that.value.indexOf('url(') == 0
                },

                getFillStyle: function (e) {
                    var def = this.getDefinition();

                    // gradient
                    if (def != null && def.createGradient) {
                        return def.createGradient(svg.ctx, e);
                    }

                    // pattern
                    if (def != null && def.createPattern) {
                        return def.createPattern(svg.ctx, e);
                    }

                    return null;
                }
            }

            // length extensions
            this.Length = {
                DPI: function (viewPort) {
                    return 96.0; // TODO: compute?
                },

                EM: function (viewPort) {
                    var em = 12;

                    var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
                    if (fontSize.hasValue()) em = fontSize.Length.toPixels(viewPort);

                    return em;
                },

                // get the length as pixels
                toPixels: function (viewPort) {
                    if (!that.hasValue()) return 0;
                    var s = that.value + '';
                    if (s.match(/em$/)) return that.numValue() * this.EM(viewPort);
                    if (s.match(/ex$/)) return that.numValue() * this.EM(viewPort) / 2.0;
                    if (s.match(/px$/)) return that.numValue();
                    if (s.match(/pt$/)) return that.numValue() * 1.25;
                    if (s.match(/pc$/)) return that.numValue() * 15;
                    if (s.match(/cm$/)) return that.numValue() * this.DPI(viewPort) / 2.54;
                    if (s.match(/mm$/)) return that.numValue() * this.DPI(viewPort) / 25.4;
                    if (s.match(/in$/)) return that.numValue() * this.DPI(viewPort);
                    if (s.match(/%$/)) return that.numValue() * svg.ViewPort.ComputeSize(viewPort);
                    return that.numValue();
                }
            }

            // time extensions
            this.Time = {
                // get the time as milliseconds
                toMilliseconds: function () {
                    if (!that.hasValue()) return 0;
                    var s = that.value + '';
                    if (s.match(/s$/)) return that.numValue() * 1000;
                    if (s.match(/ms$/)) return that.numValue();
                    return that.numValue();
                }
            }

            // angle extensions
            this.Angle = {
                // get the angle as radians
                toRadians: function () {
                    if (!that.hasValue()) return 0;
                    var s = that.value + '';
                    if (s.match(/deg$/)) return that.numValue() * (Math.PI / 180.0);
                    if (s.match(/grad$/)) return that.numValue() * (Math.PI / 200.0);
                    if (s.match(/rad$/)) return that.numValue();
                    return that.numValue() * (Math.PI / 180.0);
                }
            }
        }

        // 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;

            this.angleTo = function (p) {
                return Math.atan2(p.y - this.y, p.x - this.x);
            }

            this.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.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.Angle.toRadians());
                    ctx.translate(-this.cx, -this.cy);
                }
                this.applyToPoint = function (p) {
                    var a = this.angle.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.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.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.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.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.applyToPoint = function (p) {
                for (var i = 0; i < this.transforms.length; i++) {
                    this.transforms[i].applyToPoint(p);
                }
            }

            var data = svg.trim(svg.compressSpaces(v)).split(/\s(?=[a-z])/);
            for (var i = 0; i < data.length; i++) {
                var type = data[i].split('(')[0];
                var s = data[i].split('(')[1].replace(')', '');
                var transform = new this.Type[type](s);
                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.Length.toPixels('x'), -scaleMin * refY.Length.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.Element.ElementBase = function (node) {
            this.attributes = {};
            this.styles = {};
            this.children = [];

            // get or create attribute
            this.attribute = function (name, createIfNotExists) {
                var a = this.attributes[name];
                if (a != null) return a;

                a = new svg.Property(name, '');
                if (createIfNotExists == true) this.attributes[name] = a;
                return a;
            }

            // get or create style, crawls up node tree
            this.style = function (name, createIfNotExists) {
                var s = this.styles[name];
                if (s != null) return s;

                var a = this.attribute(name);
                if (a != null && a.hasValue()) {
                    return a;
                }

                var p = this.parent;
                if (p != null) {
                    var ps = p.style(name);
                    if (ps != null && ps.hasValue()) {
                        return ps;
                    }
                }

                s = new svg.Property(name, '');
                if (createIfNotExists == true) this.styles[name] = s;
                return s;
            }

            // 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.attribute('visibility').value == 'hidden') return;

                ctx.save();
                this.setContext(ctx);
                // mask
                if (this.attribute('mask').hasValue()) {
                    var mask = this.attribute('mask').Definition.getDefinition();
                    if (mask != null) mask.apply(ctx, this);
                }
                else if (this.style('filter').hasValue()) {
                    var filter = this.style('filter').Definition.getDefinition();
                    if (filter != null) filter.apply(ctx, this);
                }
                else 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;
                this.children.push(child);
            }

            if (node != null && node.nodeType == 1) { //ELEMENT_NODE
                // 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
                }

                // 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.nodeValue);
                }

                // add tag styles
                var styles = svg.Styles[node.nodeName];
                if (styles != null) {
                    for (var name in styles) {
                        this.styles[name] = styles[name];
                    }
                }

                // add class styles
                if (this.attribute('class').hasValue()) {
                    var classes = svg.compressSpaces(this.attribute('class').value).split(' ');
                    for (var j = 0; j < classes.length; j++) {
                        styles = svg.Styles['.' + classes[j]];
                        if (styles != null) {
                            for (var name in styles) {
                                this.styles[name] = styles[name];
                            }
                        }
                        styles = svg.Styles[node.nodeName + '.' + classes[j]];
                        if (styles != null) {
                            for (var name in styles) {
                                this.styles[name] = styles[name];
                            }
                        }
                    }
                }

                // 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;
                    }
                }
            }
        }

        svg.Element.RenderedElementBase = function (node) {
            this.base = svg.Element.ElementBase;
            this.base(node);

            this.setContext = function (ctx) {
                // fill
                if (this.style('fill').Definition.isUrl()) {
                    var fs = this.style('fill').Definition.getFillStyle(this);
                    if (fs != null) ctx.fillStyle = fs;
                }
                else if (this.style('fill').hasValue()) {
                    var fillStyle = this.style('fill');
                    if (this.style('fill-opacity').hasValue()) fillStyle = fillStyle.Color.addOpacity(this.style('fill-opacity').value);
                    ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
                }

                // stroke
                if (this.style('stroke').Definition.isUrl()) {
                    var fs = this.style('stroke').Definition.getFillStyle(this);
                    if (fs != null) ctx.strokeStyle = fs;
                }
                else if (this.style('stroke').hasValue()) {
                    var strokeStyle = this.style('stroke');
                    if (this.style('stroke-opacity').hasValue()) strokeStyle = strokeStyle.Color.addOpacity(this.style('stroke-opacity').value);
                    ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
                }
                if (this.style('stroke-width').hasValue()) ctx.lineWidth = this.style('stroke-width').Length.toPixels();
                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;

                // 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').Length.toPixels() + 'px' : '',
                        this.style('font-family').value).toString();
                }

                // transform
                if (this.attribute('transform').hasValue()) {
                    var transform = new svg.Transform(this.attribute('transform').value);
                    transform.apply(ctx);
                }

                // clip
                if (this.attribute('clip-path').hasValue()) {
                    var clip = this.attribute('clip-path').Definition.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 != '') ctx.fill();
                if (ctx.strokeStyle != '') ctx.stroke();

                var markers = this.getMarkers();
                if (markers != null) {
                    if (this.style('marker-start').Definition.isUrl()) {
                        var marker = this.style('marker-start').Definition.getDefinition();
                        marker.render(ctx, markers[0][0], markers[0][1]);
                    }
                    if (this.style('marker-mid').Definition.isUrl()) {
                        var marker = this.style('marker-mid').Definition.getDefinition();
                        for (var i = 1; i < markers.length - 1; i++) {
                            marker.render(ctx, markers[i][0], markers[i][1]);
                        }
                    }
                    if (this.style('marker-end').Definition.isUrl()) {
                        var marker = this.style('marker-end').Definition.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
                ctx.strokeStyle = 'rgba(0,0,0,0)';
                ctx.lineCap = 'butt';
                ctx.lineJoin = 'miter';
                ctx.miterLimit = 4;

                this.baseSetContext(ctx);

                // create new view port
                if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
                    ctx.translate(this.attribute('x').Length.toPixels('x'), this.attribute('y').Length.toPixels('y'));
                }

                var width = svg.ViewPort.width();
                var height = svg.ViewPort.height();
                if (typeof (this.root) == 'undefined' && this.attribute('width').hasValue() && this.attribute('height').hasValue()) {
                    width = this.attribute('width').Length.toPixels('x');
                    height = this.attribute('height').Length.toPixels('y');

                    var x = 0;
                    var y = 0;
                    if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
                        x = -this.attribute('refX').Length.toPixels('x');
                        y = -this.attribute('refY').Length.toPixels('y');
                    }

                    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').Length.toPixels('x');
                var y = this.attribute('y').Length.toPixels('y');
                var width = this.attribute('width').Length.toPixels('x');
                var height = this.attribute('height').Length.toPixels('y');
                var rx = this.attribute('rx').Length.toPixels('x');
                var ry = this.attribute('ry').Length.toPixels('y');
                if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
                if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;

                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').Length.toPixels('x');
                var cy = this.attribute('cy').Length.toPixels('y');
                var r = this.attribute('r').Length.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').Length.toPixels('x');
                var ry = this.attribute('ry').Length.toPixels('y');
                var cx = this.attribute('cx').Length.toPixels('x');
                var cy = this.attribute('cy').Length.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').Length.toPixels('x'), this.attribute('y1').Length.toPixels('y')),
                    new svg.Point(this.attribute('x2').Length.toPixels('x'), this.attribute('y2').Length.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
            d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // separate commands from commands
            d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // separate commands from commands
            d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm, '$1 $2'); // separate commands from points
            d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // separate commands from points
            d = d.replace(/([0-9])([+\-])/gm, '$1 $2'); // separate digits when no comma
            d = d.replace(/(\.[0-9]*)(\.)/gm, '$1 $2'); // separate digits when no 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 () {
                    return this.command == this.command.toLowerCase();
                }

                this.getToken = function () {
                    this.i = this.i + 1;
                    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') {
                        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.x;
                        p.y = this.current.y + p.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.toUpperCase()) {
                        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':
                            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':
                            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':
                            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':
                            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':
                            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':
                            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':
                            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':
                            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;

                                if (sweepFlag == 0 && ad > 0) ad = ad - 2 * Math.PI;
                                if (sweepFlag == 1 && ad < 0) ad = ad + 2 * Math.PI;

                                // for markers
                                var halfWay = new svg.Point(
                                    centp.x - rx * Math.cos((a1 + ad) / 2),
                                    centp.y - ry * Math.sin((a1 + ad) / 2)
                                );
                                pp.addMarkerAngle(halfWay, (a1 + ad) / 2 + (sweepFlag == 0 ? 1 : -1) * Math.PI / 2);
                                pp.addMarkerAngle(cp, ad + (sweepFlag == 0 ? 1 : -1) * Math.PI / 2);

                                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':
                            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) {
                // 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['x'] = new svg.Property('x', this.attribute('x').value);
                tempSvg.attributes['y'] = new svg.Property('y', this.attribute('y').value);
                tempSvg.attributes['width'] = new svg.Property('width', this.attribute('width').value);
                tempSvg.attributes['height'] = new svg.Property('height', this.attribute('height').value);
                tempSvg.children = this.children;

                var c = document.createElement('canvas');
                c.width = this.attribute('width').Length.toPixels('x');
                c.height = this.attribute('height').Length.toPixels('y');
                tempSvg.render(c.getContext('2d'));
                return ctx.createPattern(c, 'repeat');
            }
        }
        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.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');

            this.stops = [];
            for (var i = 0; i < this.children.length; i++) {
                var child = this.children[i];
                this.stops.push(child);
            }

            this.getGradient = function () {
                // OVERRIDE ME!
            }

            this.createGradient = function (ctx, element) {
                var stopsContainer = this;
                if (this.attribute('xlink:href').hasValue()) {
                    stopsContainer = this.attribute('xlink:href').Definition.getDefinition();
                }

                var g = this.getGradient(ctx, element);
                for (var i = 0; i < stopsContainer.stops.length; i++) {
                    g.addColorStop(stopsContainer.stops[i].offset, 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.getGradient = function (ctx, element) {
                var bb = element.getBoundingBox();

                var x1 = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.x() + bb.width() * this.attribute('x1').numValue()
                    : this.attribute('x1').Length.toPixels('x'));
                var y1 = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.y() + bb.height() * this.attribute('y1').numValue()
                    : this.attribute('y1').Length.toPixels('y'));
                var x2 = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.x() + bb.width() * this.attribute('x2').numValue()
                    : this.attribute('x2').Length.toPixels('x'));
                var y2 = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.y() + bb.height() * this.attribute('y2').numValue()
                    : this.attribute('y2').Length.toPixels('y'));

                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.getGradient = function (ctx, element) {
                var bb = element.getBoundingBox();

                var cx = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.x() + bb.width() * this.attribute('cx').numValue()
                    : this.attribute('cx').Length.toPixels('x'));
                var cy = (this.gradientUnits == 'objectBoundingBox'
                    ? bb.y() + bb.height() * this.attribute('cy').numValue()
                    : this.attribute('cy').Length.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').Length.toPixels('x'));
                }
                if (this.attribute('fy').hasValue()) {
                    fy = (this.gradientUnits == 'objectBoundingBox'
                        ? bb.y() + bb.height() * this.attribute('fy').numValue()
                        : this.attribute('fy').Length.toPixels('y'));
                }

                var r = (this.gradientUnits == 'objectBoundingBox'
                    ? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
                    : this.attribute('r').Length.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();

            var stopColor = this.style('stop-color');
            if (this.style('stop-opacity').hasValue()) stopColor = stopColor.Color.addOpacity(this.style('stop-opacity').value);
            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').Time.toMilliseconds();
            this.maxDuration = this.begin + this.attribute('dur').Time.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.removed = false;

            this.calcValue = function () {
                // OVERRIDE ME!
                return '';
            }

            this.update = function (delta) {
                // set initial value
                if (this.initialValue == null) {
                    this.initialValue = this.getProperty().value;
                }

                // if we're past the end time
                if (this.duration > this.maxDuration) {
                    // loop for indefinitely repeating animations
                    if (this.attribute('repeatCount').value == 'indefinite') {
                        this.duration = 0.0
                    }
                    else if (this.attribute('fill').valueOrDefault('remove') == 'remove' && !this.removed) {
                        this.removed = true;
                        this.getProperty().value = this.initialValue;
                        return true;
                    }
                    else {
                        return false; // no updates made
                    }
                }
                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;
            }

            // fraction of duration we've covered
            this.progress = function () {
                return ((this.duration - this.begin) / (this.maxDuration - this.begin));
            }
        }
        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 from = this.attribute('from').numValue();
                var to = this.attribute('to').numValue();

                // tween value linearly
                return from + (to - from) * this.progress();
            };
        }
        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 from = new RGBColor(this.attribute('from').value);
                var to = new RGBColor(this.attribute('to').value);

                if (from.ok && to.ok) {
                    // tween color linearly
                    var r = from.r + (to.r - from.r) * this.progress();
                    var g = from.g + (to.g - from.g) * this.progress();
                    var b = from.b + (to.b - from.b) * this.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.animate;
            this.base(node);
        }
        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.base = svg.Element.RenderedElementBase;
            this.base(node);

            if (node != null) {
                // add children
                this.children = [];
                for (var i = 0; i < node.childNodes.length; i++) {
                    var childNode = node.childNodes[i];
                    if (childNode.nodeType == 1) { // capture tspan and tref nodes
                        this.addChild(childNode, true);
                    }
                    else if (childNode.nodeType == 3) { // capture text
                        this.addChild(new svg.Element.tspan(childNode), false);
                    }
                }
            }

            this.baseSetContext = this.setContext;
            this.setContext = function (ctx) {
                this.baseSetContext(ctx);
                if (this.style('dominant-baseline').hasValue()) ctx.textBaseline = this.style('dominant-baseline').value;
                if (this.style('alignment-baseline').hasValue()) ctx.textBaseline = this.style('alignment-baseline').value;
            }

            this.renderChildren = function (ctx) {
                var textAnchor = this.style('text-anchor').valueOrDefault('start');
                var x = this.attribute('x').Length.toPixels('x');
                var y = this.attribute('y').Length.toPixels('y');
                for (var i = 0; i < this.children.length; i++) {
                    var child = this.children[i];

                    if (child.attribute('x').hasValue()) {
                        child.x = child.attribute('x').Length.toPixels('x');
                    }
                    else {
                        if (child.attribute('dx').hasValue()) x += child.attribute('dx').Length.toPixels('x');
                        child.x = x;
                    }

                    var childLength = child.measureText(ctx);
                    if (textAnchor != 'start' && (i == 0 || child.attribute('x').hasValue())) { // new group?
                        // loop through rest of children
                        var groupLength = childLength;
                        for (var j = i + 1; j < this.children.length; j++) {
                            var childInGroup = this.children[j];
                            if (childInGroup.attribute('x').hasValue()) break; // new group
                            groupLength += childInGroup.measureText(ctx);
                        }
                        child.x -= (textAnchor == 'end' ? groupLength : groupLength / 2.0);
                    }
                    x = child.x + childLength;

                    if (child.attribute('y').hasValue()) {
                        child.y = child.attribute('y').Length.toPixels('y');
                    }
                    else {
                        if (child.attribute('dy').hasValue()) y += child.attribute('dy').Length.toPixels('y');
                        child.y = y;
                    }
                    y = child.y;

                    child.render(ctx);
                }
            }
        }
        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').Definition.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.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
                if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
            }

            this.getText = function () {
                // OVERRIDE ME
            }

            this.measureText = function (ctx) {
                var customFont = this.parent.style('font-family').Definition.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.base = svg.Element.TextElementBase;
            this.base(node);

            this.text = node.nodeType == 3 ? node.nodeValue : // text
                node.childNodes.length > 0 ? node.childNodes[0].nodeValue : // element
                    node.text;
            this.getText = function () {
                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.attribute('xlink:href').Definition.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 = true;
            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].nodeValue : '';
            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.Length.toPixels('y'), this.x + this.measureText(ctx), this.y));
                }
                else {
                    // 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.attribute('xlink:href').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);

            svg.Images.push(this);
            this.img = document.createElement('img');
            this.loaded = false;
            var that = this;
            this.img.onload = function () { that.loaded = true; }
            this.img.src = this.attribute('xlink:href').value;

            this.renderChildren = function (ctx) {
                var x = this.attribute('x').Length.toPixels('x');
                var y = this.attribute('y').Length.toPixels('y');

                var width = this.attribute('width').Length.toPixels('x');
                var height = this.attribute('height').Length.toPixels('y');
                if (width == 0 || height == 0) return;

                ctx.save();
                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();
            }
        }
        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.baseSetContext = this.setContext;
            this.setContext = function (ctx) {
                this.baseSetContext(ctx);

                // 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,
                        this.attribute('width').Length.toPixels('x'),
                        width,
                        this.attribute('height').Length.toPixels('y'),
                        height,
                        minX,
                        minY);

                    svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);
                }
            }
        }
        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 = node.childNodes[0].nodeValue + (node.childNodes.length > 1 ? node.childNodes[1].nodeValue : '');
            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 = {};
                            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;
                            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').Length.toPixels('x'), 0);
                if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').Length.toPixels('y'));
            }

            this.getDefinition = function () {
                var element = this.attribute('xlink:href').Definition.getDefinition();
                if (this.attribute('width').hasValue()) element.attribute('width', true).value = this.attribute('width').value;
                if (this.attribute('height').hasValue()) element.attribute('height', true).value = this.attribute('height').value;
                return element;
            }

            this.path = function (ctx) {
                var element = this.getDefinition();
                if (element != null) element.path(ctx);
            }

            this.renderChildren = function (ctx) {
                var element = this.getDefinition();
                if (element != null) element.render(ctx);
            }
        }
        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').Length.toPixels('x');
                var y = this.attribute('y').Length.toPixels('y');
                var width = this.attribute('width').Length.toPixels('x');
                var height = this.attribute('height').Length.toPixels('y');

                // 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) {
                for (var i = 0; i < this.children.length; i++) {
                    if (this.children[i].path) {
                        this.children[i].path(ctx);
                        ctx.clip();
                    }
                }
            }

            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 = this.attribute('x').Length.toPixels('x');
                var y = this.attribute('y').Length.toPixels('y');
                if (x == 0 || y == 0) {
                    x = bb.x1;
                    y = bb.y1;
                }
                var width = this.attribute('width').Length.toPixels('x');
                var height = this.attribute('height').Length.toPixels('y');
                if (width == 0 || height == 0) {
                    width = bb.width();
                    height = bb.height();
                }

                // temporarily remove filter to avoid recursion
                var filter = element.style('filter').value;
                element.style('filter').value = '';

                // max filter distance
                var extraPercent = .20;
                var px = extraPercent * width;
                var py = extraPercent * height;

                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++) {
                    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.feGaussianBlur = function (node) {
            this.base = svg.Element.ElementBase;
            this.base(node);

            function make_fgauss(sigma) {
                sigma = Math.max(sigma, 0.01);
                var len = Math.ceil(sigma * 4.0) + 1;
                mask = [];
                for (var i = 0; i < len; i++) {
                    mask[i] = Math.exp(-0.5 * (i / sigma) * (i / sigma));
                }
                return mask;
            }

            function normalize(mask) {
                var sum = 0;
                for (var i = 1; i < mask.length; i++) {
                    sum += Math.abs(mask[i]);
                }
                sum = 2 * sum + Math.abs(mask[0]);
                for (var i = 0; i < mask.length; i++) {
                    mask[i] /= sum;
                }
                return mask;
            }

            function convolve_even(src, dst, mask, width, height) {
                for (var y = 0; y < height; y++) {
                    for (var x = 0; x < width; x++) {
                        var a = imGet(src, x, y, width, height, 3) / 255;
                        for (var rgba = 0; rgba < 4; rgba++) {
                            var sum = mask[0] * (a == 0 ? 255 : imGet(src, x, y, width, height, rgba)) * (a == 0 || rgba == 3 ? 1 : a);
                            for (var i = 1; i < mask.length; i++) {
                                var a1 = imGet(src, Math.max(x - i, 0), y, width, height, 3) / 255;
                                var a2 = imGet(src, Math.min(x + i, width - 1), y, width, height, 3) / 255;
                                sum += mask[i] *
                                    ((a1 == 0 ? 255 : imGet(src, Math.max(x - i, 0), y, width, height, rgba)) * (a1 == 0 || rgba == 3 ? 1 : a1) +
                                        (a2 == 0 ? 255 : imGet(src, Math.min(x + i, width - 1), y, width, height, rgba)) * (a2 == 0 || rgba == 3 ? 1 : a2));
                            }
                            imSet(dst, y, x, height, width, rgba, sum);
                        }
                    }
                }
            }

            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 blur(ctx, width, height, sigma) {
                var srcData = ctx.getImageData(0, 0, width, height);
                var mask = make_fgauss(sigma);
                mask = normalize(mask);
                tmp = [];
                convolve_even(srcData.data, tmp, mask, width, height);
                convolve_even(tmp, srcData.data, mask, height, width);
                ctx.clearRect(0, 0, width, height);
                ctx.putImageData(srcData, 0, 0);
            }

            this.apply = function (ctx, x, y, width, height) {
                // assuming x==0 && y==0 for now
                blur(ctx, width, height, this.attribute('stdDeviation').numValue());
            }
        }
        svg.Element.filter.prototype = new svg.Element.feGaussianBlur;

        // 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) {
            console.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;

            // 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').Length.toPixels('x');
                        ctx.canvas.style.width = ctx.canvas.width + 'px';
                    }
                    if (e.style('height').hasValue()) {
                        ctx.canvas.height = e.style('height').Length.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;
                svg.ViewPort.SetCurrent(cWidth, cHeight);

                if (svg.opts != null && svg.opts['offsetX'] != null) e.attribute('x', true).value = svg.opts['offsetX'];
                if (svg.opts != null && svg.opts['offsetY'] != null) e.attribute('y', true).value = svg.opts['offsetY'];
                if (svg.opts != null && svg.opts['scaleWidth'] != null && svg.opts['scaleHeight'] != null) {
                    var xRatio = 1, yRatio = 1;
                    if (e.attribute('width').hasValue()) xRatio = e.attribute('width').Length.toPixels('x') / svg.opts['scaleWidth'];
                    if (e.attribute('height').hasValue()) yRatio = e.attribute('height').Length.toPixels('y') / svg.opts['scaleHeight'];

                    e.attribute('width', true).value = svg.opts['scaleWidth'];
                    e.attribute('height', true).value = svg.opts['scaleHeight'];
                    e.attribute('viewBox', true).value = '0 0 ' + (cWidth * xRatio) + ' ' + (cHeight * yRatio);
                    e.attribute('preserveAspectRatio', true).value = 'none';
                }

                // clear and render
                if (svg.opts['ignoreClear'] != true) {
                    ctx.clearRect(0, 0, cWidth, cHeight);
                }
                e.render(ctx);
                if (isFirstRender) {
                    isFirstRender = false;
                    if (svg.opts != null && typeof (svg.opts['renderCallback']) == 'function') svg.opts['renderCallback']();
                }
            }

            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 (svg.opts != null && 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 (CanvasRenderingContext2D) {
    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
        });
    }
}/**
 * @license Highcharts JS v3.0.6 (2013-10-04)
 * CanVGRenderer Extension module
 *
 * (c) 2011-2012 Torstein Hønsi, Erik Olsson
 *
 * License: www.highcharts.com/license
 */

// JSLint options:
/*global Highcharts */

(function (Highcharts) { // encapsulate
    var UNDEFINED,
        DIV = 'div',
        ABSOLUTE = 'absolute',
        RELATIVE = 'relative',
        HIDDEN = 'hidden',
        VISIBLE = 'visible',
        PX = 'px',
        css = Highcharts.css,
        CanVGRenderer = Highcharts.CanVGRenderer,
        SVGRenderer = Highcharts.SVGRenderer,
        extend = Highcharts.extend,
        merge = Highcharts.merge,
        addEvent = Highcharts.addEvent,
        createElement = Highcharts.createElement,
        discardElement = Highcharts.discardElement;

    // Extend CanVG renderer on demand, inherit from SVGRenderer
    extend(CanVGRenderer.prototype, SVGRenderer.prototype);

    // Add additional functionality:
    extend(CanVGRenderer.prototype, {
        create: function (chart, container, chartWidth, chartHeight) {
            this.setContainer(container, chartWidth, chartHeight);
            this.configure(chart);
        },
        setContainer: function (container, chartWidth, chartHeight) {
            var containerStyle = container.style,
                containerParent = container.parentNode,
                containerLeft = containerStyle.left,
                containerTop = containerStyle.top,
                containerOffsetWidth = container.offsetWidth,
                containerOffsetHeight = container.offsetHeight,
                canvas,
                initialHiddenStyle = { visibility: HIDDEN, position: ABSOLUTE };

            this.init.apply(this, [container, chartWidth, chartHeight]);

            // add the canvas above it
            canvas = createElement('canvas', {
                width: containerOffsetWidth,
                height: containerOffsetHeight
            }, {
                    position: RELATIVE,
                    left: containerLeft,
                    top: containerTop
                }, container);
            this.canvas = canvas;

            // Create the tooltip line and div, they are placed as siblings to
            // the container (and as direct childs to the div specified in the html page)
            this.ttLine = createElement(DIV, null, initialHiddenStyle, containerParent);
            this.ttDiv = createElement(DIV, null, initialHiddenStyle, containerParent);
            this.ttTimer = UNDEFINED;

            // Move away the svg node to a new div inside the container's parent so we can hide it.
            var hiddenSvg = createElement(DIV, {
                width: containerOffsetWidth,
                height: containerOffsetHeight
            }, {
                    visibility: HIDDEN,
                    left: containerLeft,
                    top: containerTop
                }, containerParent);
            this.hiddenSvg = hiddenSvg;
            hiddenSvg.appendChild(this.box);
        },

		/**
		 * Configures the renderer with the chart. Attach a listener to the event tooltipRefresh.
		 **/
        configure: function (chart) {
            var renderer = this,
                options = chart.options.tooltip,
                borderWidth = options.borderWidth,
                tooltipDiv = renderer.ttDiv,
                tooltipDivStyle = options.style,
                tooltipLine = renderer.ttLine,
                padding = parseInt(tooltipDivStyle.padding, 10);

            // Add border styling from options to the style
            tooltipDivStyle = merge(tooltipDivStyle, {
                padding: padding + PX,
                'background-color': options.backgroundColor,
                'border-style': 'solid',
                'border-width': borderWidth + PX,
                'border-radius': options.borderRadius + PX
            });

            // Optionally add shadow
            if (options.shadow) {
                tooltipDivStyle = merge(tooltipDivStyle, {
                    'box-shadow': '1px 1px 3px gray', // w3c
                    '-webkit-box-shadow': '1px 1px 3px gray' // webkit
                });
            }
            css(tooltipDiv, tooltipDivStyle);

            // Set simple style on the line
            css(tooltipLine, {
                'border-left': '1px solid darkgray'
            });

            // This event is triggered when a new tooltip should be shown
            addEvent(chart, 'tooltipRefresh', function (args) {
                var chartContainer = chart.container,
                    offsetLeft = chartContainer.offsetLeft,
                    offsetTop = chartContainer.offsetTop,
                    position;

                // Set the content of the tooltip
                tooltipDiv.innerHTML = args.text;

                // Compute the best position for the tooltip based on the divs size and container size.
                position = chart.tooltip.getPosition(tooltipDiv.offsetWidth, tooltipDiv.offsetHeight, { plotX: args.x, plotY: args.y });

                css(tooltipDiv, {
                    visibility: VISIBLE,
                    left: position.x + PX,
                    top: position.y + PX,
                    'border-color': args.borderColor
                });

                // Position the tooltip line
                css(tooltipLine, {
                    visibility: VISIBLE,
                    left: offsetLeft + args.x + PX,
                    top: offsetTop + chart.plotTop + PX,
                    height: chart.plotHeight + PX
                });

                // This timeout hides the tooltip after 3 seconds
                // First clear any existing timer
                if (renderer.ttTimer !== UNDEFINED) {
                    clearTimeout(renderer.ttTimer);
                }

                // Start a new timer that hides tooltip and line
                renderer.ttTimer = setTimeout(function () {
                    css(tooltipDiv, { visibility: HIDDEN });
                    css(tooltipLine, { visibility: HIDDEN });
                }, 3000);
            });
        },

		/**
		 * Extend SVGRenderer.destroy to also destroy the elements added by CanVGRenderer.
		 */
        destroy: function () {
            var renderer = this;

            // Remove the canvas
            discardElement(renderer.canvas);

            // Kill the timer
            if (renderer.ttTimer !== UNDEFINED) {
                clearTimeout(renderer.ttTimer);
            }

            // Remove the divs for tooltip and line
            discardElement(renderer.ttLine);
            discardElement(renderer.ttDiv);
            discardElement(renderer.hiddenSvg);

            // Continue with base class
            return SVGRenderer.prototype.destroy.apply(renderer);
        },

		/**
		 * Take a color and return it if it's a string, do not make it a gradient even if it is a
		 * gradient. Currently canvg cannot render gradients (turns out black),
		 * see: http://code.google.com/p/canvg/issues/detail?id=104
		 *
		 * @param {Object} color The color or config object
		 */
        color: function (color, elem, prop) {
            if (color && color.linearGradient) {
                // Pick the end color and forward to base implementation
                color = color.stops[color.stops.length - 1][1];
            }
            return SVGRenderer.prototype.color.call(this, color, elem, prop);
        },

		/**
		 * Draws the SVG on the canvas or adds a draw invokation to the deferred list.
		 */
        draw: function () {
            var renderer = this;
            window.canvg(renderer.canvas, renderer.hiddenSvg.innerHTML);
        }
    });
}(Highcharts));