/*     
  Canvas Query 0.8.4
  http://canvasquery.org
  (c) 2012-2013 http://rezoner.net
  Canvas Query may be freely distributed under the MIT license.
*/

(function(window, undefined) {

  var MOBILE = /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent);


  window.requestAnimationFrame = (function() {
    return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) {
      window.setTimeout(callback, 1000 / 60);
    };
  })();


  var $ = function(selector) {
    if (arguments.length === 0) {
      var canvas = $.createCanvas(window.innerWidth, window.innerHeight);
      window.addEventListener("resize", function() {
        // canvas.width = window.innerWidth;
        // canvas.height = window.innerHeight;
      });
    } else if (typeof selector === "string") {
      var canvas = document.querySelector(selector);
    } else if (typeof selector === "number") {
      var canvas = $.createCanvas(arguments[0], arguments[1]);
    } else if (selector instanceof Image || selector instanceof HTMLImageElement) {
      var canvas = $.createCanvas(selector);
    } else if (selector instanceof $.Wrapper) {
      return selector;
    } else {
      var canvas = selector;
    }

    return new $.Wrapper(canvas);
  }

  $.extend = function() {
    for (var i = 1; i < arguments.length; i++) {
      for (var j in arguments[i]) {
        arguments[0][j] = arguments[i][j];
      }
    }

    return arguments[0];
  };

  $.augment = function() {
    for (var i = 1; i < arguments.length; i++) {
      _.extend(arguments[0], arguments[i]);
      arguments[i](arguments[0]);
    }
  };

  $.distance = function(x1, y1, x2, y2) {
    if (arguments.length > 2) {
      var dx = x1 - x2;
      var dy = y1 - y2;

      return Math.sqrt(dx * dx + dy * dy);
    } else {
      return Math.abs(x1 - y1);
    }
  };

  $.extend($, {

    keycodes: {
      37: "left",
      38: "up",
      39: "right",
      40: "down",
      45: "insert",
      46: "delete",
      8: "backspace",
      9: "tab",
      13: "enter",
      16: "shift",
      17: "ctrl",
      18: "alt",
      19: "pause",
      20: "capslock",
      27: "escape",
      32: "space",
      33: "pageup",
      34: "pagedown",
      35: "end",
      112: "f1",
      113: "f2",
      114: "f3",
      115: "f4",
      116: "f5",
      117: "f6",
      118: "f7",
      119: "f8",
      120: "f9",
      121: "f10",
      122: "f11",
      123: "f12",
      144: "numlock",
      145: "scrolllock",
      186: "semicolon",
      187: "equal",
      188: "comma",
      189: "dash",
      190: "period",
      191: "slash",
      192: "graveaccent",
      219: "openbracket",
      220: "backslash",
      221: "closebraket",
      222: "singlequote"
    },

    cleanArray: function(array, property) {

      var lastArgument = arguments[arguments.length - 1];
      var isLastArgumentFunction = typeof lastArgument === "function";

      for (var i = 0, len = array.length; i < len; i++) {
        if (array[i] === null || (property && array[i][property])) {
          if (isLastArgumentFunction) {
            lastArgument(array[i]);
          }
          array.splice(i--, 1);
          len--;
        }
      }
    },

    specialBlendFunctions: ["color", "value", "hue", "saturation"],

    blendFunctions: {
      normal: function(a, b) {
        return b;
      },

      overlay: function(a, b) {
        a /= 255;
        b /= 255;
        var result = 0;

        if (a < 0.5) result = 2 * a * b;
        else result = 1 - 2 * (1 - a) * (1 - b);

        return Math.min(255, Math.max(0, result * 255 | 0));
      },

      hardLight: function(a, b) {
        return $.blendFunctions.overlay(b, a);
      },

      softLight: function(a, b) {
        a /= 255;
        b /= 255;

        var v = (1 - 2 * b) * (a * a) + 2 * b * a;
        return $.limitValue(v * 255, 0, 255);
      },

      dodge: function(a, b) {
        return Math.min(256 * a / (255 - b + 1), 255);
      },

      burn: function(a, b) {
        return 255 - Math.min(256 * (255 - a) / (b + 1), 255);
      },

      multiply: function(a, b) {
        return b * a / 255;
      },

      divide: function(a, b) {
        return Math.min(256 * a / (b + 1), 255);
      },

      screen: function(a, b) {
        return 255 - (255 - b) * (255 - a) / 255;
      },

      grainExtract: function(a, b) {
        return $.limitValue(a - b + 128, 0, 255);
      },

      grainMerge: function(a, b) {
        return $.limitValue(a + b - 128, 0, 255);
      },

      difference: function(a, b) {
        return Math.abs(a - b);
      },

      addition: function(a, b) {
        return Math.min(a + b, 255);
      },

      substract: function(a, b) {
        return Math.max(a - b, 0);
      },

      darkenOnly: function(a, b) {
        return Math.min(a, b);
      },

      lightenOnly: function(a, b) {
        return Math.max(a, b);
      },

      color: function(a, b) {
        var aHSL = $.rgbToHsl(a);
        var bHSL = $.rgbToHsl(b);

        return $.hslToRgb(bHSL[0], bHSL[1], aHSL[2]);
      },

      hue: function(a, b) {
        var aHSV = $.rgbToHsv(a);
        var bHSV = $.rgbToHsv(b);

        if (!bHSV[1]) return $.hsvToRgb(aHSV[0], aHSV[1], aHSV[2]);
        else return $.hsvToRgb(bHSV[0], aHSV[1], aHSV[2]);
      },

      value: function(a, b) {
        var aHSV = $.rgbToHsv(a);
        var bHSV = $.rgbToHsv(b);

        return $.hsvToRgb(aHSV[0], aHSV[1], bHSV[2]);
      },

      saturation: function(a, b) {
        var aHSV = $.rgbToHsv(a);
        var bHSV = $.rgbToHsv(b);

        return $.hsvToRgb(aHSV[0], bHSV[1], aHSV[2]);
      }
    },

    blend: function(below, above, mode, mix) {
      if (typeof mix === "undefined") mix = 1;

      var below = $(below);
      var above = $(above);

      var belowCtx = below.context;
      var aboveCtx = above.context;

      var belowData = belowCtx.getImageData(0, 0, below.canvas.width, below.canvas.height);
      var aboveData = aboveCtx.getImageData(0, 0, above.canvas.width, above.canvas.height);

      var belowPixels = belowData.data;
      var abovePixels = aboveData.data;

      var imageData = this.createImageData(below.canvas.width, below.canvas.height);
      var pixels = imageData.data;

      var blendingFunction = $.blendFunctions[mode];

      if ($.specialBlendFunctions.indexOf(mode) !== -1) {
        for (var i = 0, len = belowPixels.length; i < len; i += 4) {
          var rgb = blendingFunction([belowPixels[i + 0], belowPixels[i + 1], belowPixels[i + 2]], [abovePixels[i + 0], abovePixels[i + 1], abovePixels[i + 2]]);

          pixels[i + 0] = belowPixels[i + 0] + (rgb[0] - belowPixels[i + 0]) * mix;
          pixels[i + 1] = belowPixels[i + 1] + (rgb[1] - belowPixels[i + 1]) * mix;
          pixels[i + 2] = belowPixels[i + 2] + (rgb[2] - belowPixels[i + 2]) * mix;

          pixels[i + 3] = belowPixels[i + 3];
        }
      } else {

        for (var i = 0, len = belowPixels.length; i < len; i += 4) {
          var r = blendingFunction(belowPixels[i + 0], abovePixels[i + 0]);
          var g = blendingFunction(belowPixels[i + 1], abovePixels[i + 1]);
          var b = blendingFunction(belowPixels[i + 2], abovePixels[i + 2]);

          pixels[i + 0] = belowPixels[i + 0] + (r - belowPixels[i + 0]) * mix;
          pixels[i + 1] = belowPixels[i + 1] + (g - belowPixels[i + 1]) * mix;
          pixels[i + 2] = belowPixels[i + 2] + (b - belowPixels[i + 2]) * mix;

          pixels[i + 3] = belowPixels[i + 3];
        }
      }

      below.context.putImageData(imageData, 0, 0);

      return below;
    },

    wrapValue: function(value, min, max) {
      var d = Math.abs(max - min);
      return min + (value - min) % d;
    },

    limitValue: function(value, min, max) {
      return value < min ? min : value > max ? max : value;
    },

    mix: function(a, b, ammount) {
      return a + (b - a) * ammount;
    },

    hexToRgb: function(hex) {
      if (hex.length === 7) return ['0x' + hex[1] + hex[2] | 0, '0x' + hex[3] + hex[4] | 0, '0x' + hex[5] + hex[6] | 0];
      else return ['0x' + hex[1] | 0, '0x' + hex[2], '0x' + hex[3] | 0];
    },

    rgbToHex: function(r, g, b) {
      return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1, 7);
    },

    /* author: http://mjijackson.com/ */

    rgbToHsl: function(r, g, b) {

      if (r instanceof Array) {
        b = r[2];
        g = r[1];
        r = r[0];
      }

      r /= 255, g /= 255, b /= 255;
      var max = Math.max(r, g, b),
        min = Math.min(r, g, b);
      var h, s, l = (max + min) / 2;

      if (max == min) {
        h = s = 0; // achromatic
      } else {
        var d = max - min;
        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
        switch (max) {
          case r:
            h = (g - b) / d + (g < b ? 6 : 0);
            break;
          case g:
            h = (b - r) / d + 2;
            break;
          case b:
            h = (r - g) / d + 4;
            break;
        }
        h /= 6;
      }

      return [h, s, l];
    },

    /* author: http://mjijackson.com/ */

    hslToRgb: function(h, s, l) {
      var r, g, b;

      if (s == 0) {
        r = g = b = l; // achromatic
      } else {
        function hue2rgb(p, q, t) {
          if (t < 0) t += 1;
          if (t > 1) t -= 1;
          if (t < 1 / 6) return p + (q - p) * 6 * t;
          if (t < 1 / 2) return q;
          if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
          return p;
        }

        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
        var p = 2 * l - q;
        r = hue2rgb(p, q, h + 1 / 3);
        g = hue2rgb(p, q, h);
        b = hue2rgb(p, q, h - 1 / 3);
      }

      return [r * 255 | 0, g * 255 | 0, b * 255 | 0];
    },

    rgbToHsv: function(r, g, b) {
      if (r instanceof Array) {
        b = r[2];
        g = r[1];
        r = r[0];
      }

      r = r / 255, g = g / 255, b = b / 255;
      var max = Math.max(r, g, b),
        min = Math.min(r, g, b);
      var h, s, v = max;

      var d = max - min;
      s = max == 0 ? 0 : d / max;

      if (max == min) {
        h = 0; // achromatic
      } else {
        switch (max) {
          case r:
            h = (g - b) / d + (g < b ? 6 : 0);
            break;
          case g:
            h = (b - r) / d + 2;
            break;
          case b:
            h = (r - g) / d + 4;
            break;
        }
        h /= 6;
      }

      return [h, s, v];
    },

    hsvToRgb: function(h, s, v) {
      var r, g, b;

      var i = Math.floor(h * 6);
      var f = h * 6 - i;
      var p = v * (1 - s);
      var q = v * (1 - f * s);
      var t = v * (1 - (1 - f) * s);

      switch (i % 6) {
        case 0:
          r = v, g = t, b = p;
          break;
        case 1:
          r = q, g = v, b = p;
          break;
        case 2:
          r = p, g = v, b = t;
          break;
        case 3:
          r = p, g = q, b = v;
          break;
        case 4:
          r = t, g = p, b = v;
          break;
        case 5:
          r = v, g = p, b = q;
          break;
      }

      return [r * 255 | 0, g * 255 | 0, b * 255 | 0];
    },

    color: function() {
      var result = new $.Color();
      result.parse(arguments[0], arguments[1]);
      return result;
    },

    createCanvas: function(width, height) {
      var result = document.createElement("canvas");

      if (arguments[0] instanceof Image || arguments[0] instanceof HTMLImageElement) {
        var image = arguments[0];
        result.width = image.width;
        result.height = image.height;
        result.getContext("2d").drawImage(image, 0, 0);
      } else {
        result.width = width;
        result.height = height;
      }

      return result;
    },

    createImageData: function(width, height) {
      return document.createElement("Canvas").getContext("2d").createImageData(width, height);
    },


    /* https://gist.github.com/3781251 */

    mousePosition: function(event) {
      var totalOffsetX = 0,
        totalOffsetY = 0,
        coordX = 0,
        coordY = 0,
        currentElement = event.target || event.srcElement,
        mouseX = 0,
        mouseY = 0;

      // Traversing the parents to get the total offset
      do {
        totalOffsetX += currentElement.offsetLeft;
        totalOffsetY += currentElement.offsetTop;
      }
      while ((currentElement = currentElement.offsetParent));
      // Set the event to first touch if using touch-input
      if (event.changedTouches && event.changedTouches[0] !== undefined) {
        event = event.changedTouches[0];
      }
      // Use pageX to get the mouse coordinates
      if (event.pageX || event.pageY) {
        mouseX = event.pageX;
        mouseY = event.pageY;
      }
      // IE8 and below doesn't support event.pageX
      else if (event.clientX || event.clientY) {
        mouseX = event.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
        mouseY = event.clientY + document.body.scrollTop + document.documentElement.scrollTop;
      }
      // Subtract the offset from the mouse coordinates
      coordX = mouseX - totalOffsetX;
      coordY = mouseY - totalOffsetY;

      return {
        x: coordX,
        y: coordY
      };
    }
  });

  $.Wrapper = function(canvas) {
    this.context = canvas.getContext("2d");
    this.canvas = canvas;
  }

  $.Wrapper.prototype = {
    appendTo: function(selector) {
      if (typeof selector === "object") {
        var element = selector;
      } else {
        var element = document.querySelector(selector);
      }

      element.appendChild(this.canvas);

      return this;
    },

    blendOn: function(what, mode, mix) {
      $.blend(what, this, mode, mix);

      return this;
    },

    blend: function(what, mode, mix) {
      if (typeof what === "string") {
        var color = what;
        what = $($.createCanvas(this.canvas.width, this.canvas.height));
        what.fillStyle(color).fillRect(0, 0, this.canvas.width, this.canvas.height);
      }

      $.blend(this, what, mode, mix);

      return this;
    },

    circle: function(x, y, r) {
      this.context.arc(x, y, r, 0, Math.PI * 2);
      return this;
    },

    crop: function(x, y, w, h) {

      var canvas = $.createCanvas(w, h);
      var context = canvas.getContext("2d");

      context.drawImage(this.canvas, x, y, w, h, 0, 0, w, h);
      this.canvas.width = w;
      this.canvas.height = h;
      this.clear();
      this.context.drawImage(canvas, 0, 0);

      return this;
    },

    set: function(properties) {
      $.extend(this.context, properties);
    },

    resize: function(width, height) {
      var w = width,
        h = height;

      if (arguments.length === 1) {
        w = arguments[0] * this.canvas.width | 0;
        h = arguments[0] * this.canvas.height | 0;
      } else {

        if (height === null) {
          if (this.canvas.width > width) {
            h = this.canvas.height * (width / this.canvas.width) | 0;
            w = width;
          } else {
            w = this.canvas.width;
            h = this.canvas.height;
          }
        } else if (width === null) {
          if (this.canvas.width > width) {
            w = this.canvas.width * (height / this.canvas.height) | 0;
            h = height;
          } else {
            w = this.canvas.width;
            h = this.canvas.height;
          }
        }
      }

      var $resized = $(w, h).drawImage(this.canvas, 0, 0, this.canvas.width, this.canvas.height, 0, 0, w, h);
      this.canvas = $resized.canvas;
      this.context = $resized.context;

      return this;
    },


    trim: function(color, changes) {
      var transparent;

      if (color) {
        color = $.color(color).toArray();
        transparent = !color[3];
      } else transparent = true;

      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var bound = [this.canvas.width, this.canvas.height, 0, 0];

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        if (transparent) {
          if (!sourcePixels[i + 3]) continue;
        } else if (sourcePixels[i + 0] === color[0] && sourcePixels[i + 1] === color[1] && sourcePixels[i + 2] === color[2]) continue;
        var x = (i / 4 | 0) % this.canvas.width | 0;
        var y = (i / 4 | 0) / this.canvas.width | 0;

        if (x < bound[0]) bound[0] = x;
        if (x > bound[2]) bound[2] = x;

        if (y < bound[1]) bound[1] = y;
        if (y > bound[3]) bound[3] = y;
      }

      if (bound[2] === 0 || bound[3] === 0) {

      } else {
        if (changes) {
          changes.left = bound[0];
          changes.top = bound[1];
          changes.width = bound[2] - bound[0];
          changes.height = bound[3] - bound[1];
        }

        this.crop(bound[0], bound[1], bound[2] - bound[0] + 1, bound[3] - bound[1] + 1);
      }

      return this;
    },

    resizePixel: function(pixelSize) {

      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;
      var canvas = document.createElement("canvas");
      var context = canvas.context = canvas.getContext("2d");

      canvas.width = this.canvas.width * pixelSize | 0;
      canvas.height = this.canvas.height * pixelSize | 0;

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        if (!sourcePixels[i + 3]) continue;
        context.fillStyle = $.rgbToHex(sourcePixels[i + 0], sourcePixels[i + 1], sourcePixels[i + 2]);

        var x = (i / 4) % this.canvas.width;
        var y = (i / 4) / this.canvas.width | 0;

        context.fillRect(x * pixelSize, y * pixelSize, pixelSize, pixelSize);
      }

      this.canvas.width = canvas.width;
      this.canvas.height = canvas.height;
      this.clear().drawImage(canvas, 0, 0);

      return this;

      /* this very clever method is working only under Chrome */

      var x = 0,
        y = 0;

      var canvas = document.createElement("canvas");
      var context = canvas.context = canvas.getContext("2d");

      canvas.width = this.canvas.width * pixelSize | 0;
      canvas.height = this.canvas.height * pixelSize | 0;

      while (x < this.canvas.width) {
        y = 0;
        while (y < this.canvas.height) {
          context.drawImage(this.canvas, x, y, 1, 1, x * pixelSize, y * pixelSize, pixelSize, pixelSize);
          y++;
        }
        x++;
      }

      this.canvas = canvas;
      this.context = context;

      return this;
    },


    matchPalette: function(palette) {
      var imgData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);

      var rgbPalette = [];
      for (var i = 0; i < palette.length; i++) {
        rgbPalette.push($.color(palette[i]));
      }


      for (var i = 0; i < imgData.data.length; i += 4) {
        var difList = [];
        for (var j = 0; j < rgbPalette.length; j++) {
          var rgbVal = rgbPalette[j];
          var rDif = Math.abs(imgData.data[i] - rgbVal[0]),
            gDif = Math.abs(imgData.data[i + 1] - rgbVal[1]),
            bDif = Math.abs(imgData.data[i + 2] - rgbVal[2]);
          difList.push(rDif + gDif + bDif);
        }

        var closestMatch = 0;
        for (var j = 0; j < palette.length; j++) {
          if (difList[j] < difList[closestMatch]) {
            closestMatch = j;
          }
        }

        var paletteRgb = cq.hexToRgb(palette[closestMatch]);
        imgData.data[i] = paletteRgb[0];
        imgData.data[i + 1] = paletteRgb[1];
        imgData.data[i + 2] = paletteRgb[2];
      }

      this.context.putImageData(imgData, 0, 0);

      return this;
    },

    getPalette: function() {
      var palette = [];
      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        if (sourcePixels[i + 3]) {
          var hex = $.rgbToHex(sourcePixels[i + 0], sourcePixels[i + 1], sourcePixels[i + 2]);
          if (palette.indexOf(hex) === -1) palette.push(hex);
        }
      }

      return palette;
    },

    pixelize: function(size) {
      if (!size) return this;
      size = size || 4;

      var mozImageSmoothingEnabled = this.context.mozImageSmoothingEnabled;
      var webkitImageSmoothingEnabled = this.context.webkitImageSmoothingEnabled;

      this.context.mozImageSmoothingEnabled = false;
      this.context.webkitImageSmoothingEnabled = false;

      var scale = (this.canvas.width / size) / this.canvas.width;

      var temp = cq(this.canvas.width, this.canvas.height);

      temp.drawImage(this.canvas, 0, 0, this.canvas.width, this.canvas.height, 0, 0, this.canvas.width * scale | 0, this.canvas.height * scale | 0);
      this.clear().drawImage(temp.canvas, 0, 0, this.canvas.width * scale | 0, this.canvas.height * scale | 0, 0, 0, this.canvas.width, this.canvas.height);

      this.context.mozImageSmoothingEnabled = mozImageSmoothingEnabled;
      this.context.webkitImageSmoothingEnabled = webkitImageSmoothingEnabled;

      return this;
    },

    colorToMask: function(color, inverted) {
      color = $.color(color).toArray();
      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var mask = [];

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        if (sourcePixels[i + 0] == color[0] && sourcePixels[i + 1] == color[1] && sourcePixels[i + 2] == color[2]) mask.push(inverted || false);
        else mask.push(!inverted);
      }

      return mask;
    },

    grayscaleToMask: function(color) {
      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var mask = [];

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        mask.push((sourcePixels[i + 0] + sourcePixels[i + 1] + sourcePixels[i + 2]) / 3 | 0);
      }

      return mask;
    },

    grayscaleToAlpha: function() {
      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var mask = [];

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        sourcePixels[i + 3] = (sourcePixels[i + 0] + sourcePixels[i + 1] + sourcePixels[i + 2]) / 3 | 0;

        sourcePixels[i + 0] = sourcePixels[i + 1] = sourcePixels[i + 2] = 255;
      }

      this.context.putImageData(sourceData, 0, 0);

      return this;
    },

    applyMask: function(mask) {
      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var mode = typeof mask[0] === "boolean" ? "bool" : "byte";

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        var value = mask[i / 4];

        if (mode === "bool") sourcePixels[i + 3] = 255 * value | 0;
        else {
          sourcePixels[i + 3] = value | 0;
        }
      }


      this.context.putImageData(sourceData, 0, 0);
      return this;
    },

    fillMask: function(mask) {

      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var sourcePixels = sourceData.data;

      var maskType = typeof mask[0] === "boolean" ? "bool" : "byte";
      var colorMode = arguments.length === 2 ? "normal" : "gradient";

      var color = $.color(arguments[1]);
      if (colorMode === "gradient") colorB = $.color(arguments[2]);

      for (var i = 0, len = sourcePixels.length; i < len; i += 4) {
        var value = mask[i / 4];

        if (maskType === "byte") value /= 255;

        if (colorMode === "normal") {
          if (value) {
            sourcePixels[i + 0] = color[0] | 0;
            sourcePixels[i + 1] = color[1] | 0;
            sourcePixels[i + 2] = color[2] | 0;
            sourcePixels[i + 3] = value * 255 | 0;
          }
        } else {
          sourcePixels[i + 0] = color[0] + (colorB[0] - color[0]) * value | 0;
          sourcePixels[i + 1] = color[1] + (colorB[1] - color[1]) * value | 0;
          sourcePixels[i + 2] = color[2] + (colorB[2] - color[2]) * value | 0;
          sourcePixels[i + 3] = 255;
        }
      }

      this.context.putImageData(sourceData, 0, 0);
      return this;
    },

    clear: function(color) {
      if (color) {
        this.context.fillStyle = color;
        this.context.fillRect(0, 0, this.canvas.width, this.canvas.height);
      } else {
        this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
      }

      return this;
    },

    clone: function() {
      var result = $.createCanvas(this.canvas.width, this.canvas.height);
      result.getContext("2d").drawImage(this.canvas, 0, 0);
      return $(result);
    },

    fillStyle: function(fillStyle) {
      this.context.fillStyle = fillStyle;
      return this;
    },

    strokeStyle: function(strokeStyle) {
      this.context.strokeStyle = strokeStyle;
      return this;
    },

    gradientText: function(text, x, y, maxWidth, gradient) {

      var words = text.split(" ");

      var h = this.font().match(/\d+/g)[0] * 2;

      var ox = 0;
      var oy = 0;

      if (maxWidth) {
        var line = 0;
        var lines = [""];

        for (var i = 0; i < words.length; i++) {
          var word = words[i] + " ";
          var wordWidth = this.context.measureText(word).width;

          if (ox + wordWidth > maxWidth) {
            lines[++line] = "";
            ox = 0;
          }

          lines[line] += word;

          ox += wordWidth;
        }
      } else var lines = [text];

      for (var i = 0; i < lines.length; i++) {
        var oy = y + i * h * 0.6 | 0;
        var lingrad = this.context.createLinearGradient(0, oy, 0, oy + h * 0.6 | 0);

        for (var j = 0; j < gradient.length; j += 2) {
          lingrad.addColorStop(gradient[j], gradient[j + 1]);
        }

        var text = lines[i];

        this.fillStyle(lingrad).fillText(text, x, oy);
      }

      return this;
    },

    setHsl: function() {

      if (arguments.length === 1) {
        var args = arguments[0];
      } else {
        var args = arguments;
      }

      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b, a, h, s, l, hsl = [],
        newPixel = [];

      for (var i = 0, len = pixels.length; i < len; i += 4) {
        hsl = $.rgbToHsl(pixels[i + 0], pixels[i + 1], pixels[i + 2]);

        h = args[0] === null ? hsl[0] : $.limitValue(args[0], 0, 1);
        s = args[1] === null ? hsl[1] : $.limitValue(args[1], 0, 1);
        l = args[2] === null ? hsl[2] : $.limitValue(args[2], 0, 1);

        newPixel = $.hslToRgb(h, s, l);

        pixels[i + 0] = newPixel[0];
        pixels[i + 1] = newPixel[1];
        pixels[i + 2] = newPixel[2];
      }

      this.context.putImageData(data, 0, 0);

      return this;
    },

    shiftHsl: function() {

      if (arguments.length === 1) {
        var args = arguments[0];
      } else {
        var args = arguments;
      }

      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b, a, h, s, l, hsl = [],
        newPixel = [];

      for (var i = 0, len = pixels.length; i < len; i += 4) {
        hsl = $.rgbToHsl(pixels[i + 0], pixels[i + 1], pixels[i + 2]);

        h = args[0] === null ? hsl[0] : $.wrapValue(hsl[0] + args[0], 0, 1);
        s = args[1] === null ? hsl[1] : $.limitValue(hsl[1] + args[1], 0, 1);
        l = args[2] === null ? hsl[2] : $.limitValue(hsl[2] + args[2], 0, 1);

        newPixel = $.hslToRgb(h, s, l);

        pixels[i + 0] = newPixel[0];
        pixels[i + 1] = newPixel[1];
        pixels[i + 2] = newPixel[2];
      }


      this.context.putImageData(data, 0, 0);

      return this;
    },

    replaceHue: function(src, dst) {

      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b, a, h, s, l, hsl = [],
        newPixel = [];

      for (var i = 0, len = pixels.length; i < len; i += 4) {
        hsl = $.rgbToHsl(pixels[i + 0], pixels[i + 1], pixels[i + 2]);

        if (Math.abs(hsl[0] - src) < 0.05) h = $.wrapValue(dst, 0, 1);
        else h = hsl[0];

        newPixel = $.hslToRgb(h, hsl[1], hsl[2]);

        pixels[i + 0] = newPixel[0];
        pixels[i + 1] = newPixel[1];
        pixels[i + 2] = newPixel[2];
      }

      this.context.putImageData(data, 0, 0);

      return this;
    },

    invert: function(src, dst) {

      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b, a, h, s, l, hsl = [],
        newPixel = [];

      for (var i = 0, len = pixels.length; i < len; i += 4) {
        pixels[i + 0] = 255 - pixels[i + 0];
        pixels[i + 1] = 255 - pixels[i + 1];
        pixels[i + 2] = 255 - pixels[i + 2];
      }

      this.context.putImageData(data, 0, 0);

      return this;
    },

    roundRect: function(x, y, width, height, radius) {

      this.beginPath();
      this.moveTo(x + radius, y);
      this.lineTo(x + width - radius, y);
      this.quadraticCurveTo(x + width, y, x + width, y + radius);
      this.lineTo(x + width, y + height - radius);
      this.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
      this.lineTo(x + radius, y + height);
      this.quadraticCurveTo(x, y + height, x, y + height - radius);
      this.lineTo(x, y + radius);
      this.quadraticCurveTo(x, y, x + radius, y);
      this.closePath();

      return this;
    },

    wrappedText: function(text, x, y, maxWidth, newlineCallback) {

			var lines = text instanceof Array ? text : this.flowText(text, maxWidth);
      var h = this.font().match(/\d+/g)[0] * 2;

      var ox = 0;
      var oy = 0;

      if (maxWidth) {
        var line = 0;
        var lines = [""];

        for (var i = 0; i < words.length; i++) {
          var word = words[i] + " ";
          var wordWidth = this.context.measureText(word).width;

          if (ox + wordWidth > maxWidth) {
            lines[++line] = "";
            ox = 0;
          }

          lines[line] += word;

          ox += wordWidth;
        }
      } else {
        var lines = [text];
      }

      for (var i = 0; i < lines.length; i++) {
        var oy = y + i * h * 0.6 | 0;

        var text = lines[i];

        if (newlineCallback) newlineCallback.call(this, x, y + oy);

        this.fillText(text, x, oy);
      }

      return this;

		},

		flowText: function(text, maxWidth) {
      var words = text.split(/(\s)/);

      var ox = 0;
      var oy = 0;

      if (maxWidth) {
        var line = 0;
        var lines = [""];

        var spaceWidth = this.context.measureText(" ").width;

        for(var i = 0; i < words.length; i++) {

          var word = words[i];

					if (word == "\n") {
            lines[line] = lines[line].replace(/\s+$/,"");
            lines[++line] = "";
						ox = 0;
						continue;
					}

					else if (word == " ") {
						ox += spaceWidth;
						if (ox > maxWidth) {
            	lines[line] = lines[line].replace(/\s+$/,"");
              lines[++line] = "";
						  ox = 0;
						}
						else {
							lines[line] += " ";
						}
					}

					else {
            var wordWidth = this.context.measureText(word).width;

            ox += wordWidth;

            if(ox > maxWidth && lines[line].length) {
            	lines[line] = lines[line].replace(/\s+$/,"");
              lines[++line] = "";
              ox = wordWidth;
            }

            lines[line] += word;
          }
        }
      } else {
        var lines = [text];
      }

			return lines;

    },

    textBoundaries: function(text, maxWidth) {

			var lines = this.flowText(text, maxWidth || Infinity);

      var h = this.font().match(/\d+/g)[0] * 2;

			var w = 0;
			for (var i = 0; i < lines.length; i++) {
       	w = Math.max( w, this.measureText(lines[i]).width );
			}

      return {
        height: lines.length * h * 0.6 | 0,
        width: w,
				lines: lines
      }
    },

    paperBag: function(x, y, width, height, blowX, blowY) {
      var lx, ly;
      this.beginPath();
      this.moveTo(x, y);
      this.quadraticCurveTo(x + width / 2 | 0, y + height * blowY | 0, x + width, y);
      this.quadraticCurveTo(x + width - width * blowX | 0, y + height / 2 | 0, x + width, y + height);
      this.quadraticCurveTo(x + width / 2 | 0, y + height - height * blowY | 0, x, y + height);
      this.quadraticCurveTo(x + width * blowX | 0, y + height / 2 | 0, x, y);
    },

    borderImage: function(image, x, y, w, h, t, r, b, l, fill) {

      /* top */
      this.drawImage(image, l, 0, image.width - l - r, t, x + l, y, w - l - r, t);

      /* bottom */
      this.drawImage(image, l, image.height - b, image.width - l - r, b, x + l, y + h - b, w - l - r, b);

      /* left */
      this.drawImage(image, 0, t, l, image.height - b - t, x, y + t, l, h - b - t);

      /* right */
      this.drawImage(image, image.width - r, t, r, image.height - b - t, x + w - r, y + t, r, h - b - t);

      /* top-left */
      this.drawImage(image, 0, 0, l, t, x, y, l, t);

      /* top-right */
      this.drawImage(image, image.width - r, 0, r, t, x + w - r, y, r, t);

      /* bottom-right */
      this.drawImage(image, image.width - r, image.height - b, r, b, x + w - r, y + h - b, r, b);

      /* bottom-left */
      this.drawImage(image, 0, image.height - b, l, b, x, y + h - b, l, b);

      if (fill) {
        if (typeof fill === "string") {
          this.fillStyle(fill).fillRect(x + l, y + t, w - l - r, h - t - b);
        } else {
          this.drawImage(image, l, t, image.width - r - l, image.height - b - t, x + l, y + t, w - l - r, h - t - b);
        }
      }
    },

    /* www.html5rocks.com/en/tutorials/canvas/imagefilters/ */

    convolve: function(matrix, mix, divide) {

      if (typeof divide === "undefined") divide = 1;
      if (typeof mix === "undefined") mix = 1;

      var sourceData = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var matrixSize = Math.sqrt(matrix.length) + 0.5 | 0;
      var halfMatrixSize = matrixSize / 2 | 0;
      var src = sourceData.data;
      var sw = sourceData.width;
      var sh = sourceData.height;
      var w = sw;
      var h = sh;
      var output = $.createImageData(this.canvas.width, this.canvas.height);
      var dst = output.data;

      for (var y = 1; y < h - 1; y++) {
        for (var x = 1; x < w - 1; x++) {

          var dstOff = (y * w + x) * 4;
          var r = 0,
            g = 0,
            b = 0,
            a = 0;

          for (var cy = 0; cy < matrixSize; cy++) {
            for (var cx = 0; cx < matrixSize; cx++) {
              var scy = y + cy - halfMatrixSize;
              var scx = x + cx - halfMatrixSize;
              if (scy >= 0 && scy < sh && scx >= 0 && scx < sw) {
                var srcOff = (scy * sw + scx) * 4;

                var wt = matrix[cy * matrixSize + cx] / divide;

                r += src[srcOff + 0] * wt;
                g += src[srcOff + 1] * wt;
                b += src[srcOff + 2] * wt;
                a += src[srcOff + 3] * wt;
              }
            }
          }

          dst[dstOff + 0] = $.mix(src[dstOff + 0], r, mix);
          dst[dstOff + 1] = $.mix(src[dstOff + 1], g, mix);
          dst[dstOff + 2] = $.mix(src[dstOff + 2], b, mix);
          dst[dstOff + 3] = a;
          // src[dstOff + 3];
        }
      }
    },

    blur: function(mix) {
      return this.convolve([1, 1, 1, 1, 1, 1, 1, 1, 1], mix, 9);
    },

    gaussianBlur: function(mix) {
      return this.convolve([0.00000067, 0.00002292, 0.00019117, 0.00038771, 0.00019117, 0.00002292, 0.00000067, 0.00002292, 0.00078633, 0.00655965, 0.01330373, 0.00655965, 0.00078633, 0.00002292, 0.00019117, 0.00655965, 0.05472157, 0.11098164, 0.05472157, 0.00655965, 0.00019117, 0.00038771, 0.01330373, 0.11098164, 0.22508352, 0.11098164, 0.01330373, 0.00038771, 0.00019117, 0.00655965, 0.05472157, 0.11098164, 0.05472157, 0.00655965, 0.00019117, 0.00002292, 0.00078633, 0.00655965, 0.01330373, 0.00655965, 0.00078633, 0.00002292, 0.00000067, 0.00002292, 0.00019117, 0.00038771, 0.00019117, 0.00002292, 0.00000067], mix, 1);
    },

    sharpen: function(mix) {
      return this.convolve([0, -1, 0, -1, 5, -1, 0, -1, 0], mix);
    },

    threshold: function(threshold) {
      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b;

      for (var i = 0; i < pixels.length; i += 4) {
        var r = pixels[i];
        var g = pixels[i + 1];
        var b = pixels[i + 2];
        var v = (0.2126 * r + 0.7152 * g + 0.0722 * b >= threshold) ? 255 : 0;
        pixels[i] = pixels[i + 1] = pixels[i + 2] = v
      }

      this.context.putImageData(data, 0, 0);

      return this;
    },

    sepia: function() {
      var data = this.context.getImageData(0, 0, this.canvas.width, this.canvas.height);
      var pixels = data.data;
      var r, g, b;

      for (var i = 0; i < pixels.length; i += 4) {
        pixels[i + 0] = $.limitValue((pixels[i + 0] * .393) + (pixels[i + 1] * .769) + (pixels[i + 2] * .189), 0, 255);
        pixels[i + 1] = $.limitValue((pixels[i + 0] * .349) + (pixels[i + 1] * .686) + (pixels[i + 2] * .168), 0, 255);
        pixels[i + 2] = $.limitValue((pixels[i + 0] * .272) + (pixels[i + 1] * .534) + (pixels[i + 2] * .131), 0, 255);
      }

      this.context.putImageData(data, 0, 0);

      return this;
    },

    measureText: function() {
      return this.context.measureText.apply(this.context, arguments);
    },

    createRadialGradient: function() {
      return this.context.createRadialGradient.apply(this.context, arguments);
    },

    createLinearGradient: function() {
      return this.context.createLinearGradient.apply(this.context, arguments);
    },

    getImageData: function() {
      return this.context.getImageData.apply(this.context, arguments);
    },

    /* framework */

    framework: function(args, context) {
      if (context) {
        this.tempContext = context === true ? args : context;
      }

      for (var name in args) {
        if (this[name]) this[name](args[name], undefined, undefined);
      }

      this.tempContext = null;

      return this;
    },

    onStep: function(callback, interval) {
      var self = this.tempContext || this;
      var lastTick = Date.now();
      interval = interval || 25;

      this.timer = setInterval(function() {
        var delta = Date.now() - lastTick;
        lastTick = Date.now();
        callback.call(self, delta, lastTick);
      }, interval);

      return this;
    },

    onRender: function(callback) {
      var self = this.tempContext || this;

      var lastTick = Date.now();

      function step() {
        var delta = Date.now() - lastTick;
        lastTick = Date.now();
        requestAnimationFrame(step)
        callback.call(self, delta, lastTick);
      };

      requestAnimationFrame(step);

      return this;
    },

    onMouseMove: function(callback) {
      var self = this.tempContext || this;

      if (!MOBILE) this.canvas.addEventListener("mousemove", function(e) {
        var pos = $.mousePosition(e);
        callback.call(self, pos.x, pos.y);
      });

      else this.canvas.addEventListener("touchmove", function(e) {
        e.preventDefault();
        var pos = $.mousePosition(e);
        callback.call(self, pos.x, pos.y);
      });

      return this;
    },

    onMouseDown: function(callback) {
      var self = this.tempContext || this;

      if (!MOBILE) {
        this.canvas.addEventListener("mousedown", function(e) {
          var pos = $.mousePosition(e);
          callback.call(self, pos.x, pos.y, e.button);
        });
      } else {
        this.canvas.addEventListener("touchstart", function(e) {
          var pos = $.mousePosition(e);
          callback.call(self, pos.x, pos.y, e.button);
        });
      }

      return this;
    },

    onMouseUp: function(callback) {
      var self = this.tempContext || this;

      if (!MOBILE) {
        this.canvas.addEventListener("mouseup", function(e) {
          var pos = $.mousePosition(e);
          callback.call(self, pos.x, pos.y, e.button);
        });
      } else {
        this.canvas.addEventListener("touchend", function(e) {
          var pos = $.mousePosition(e);
          callback.call(self, pos.x, pos.y, e.button);
        });
      }

      return this;
    },


    onSwipe: function(callback, threshold, timeout) {
      var self = this.tempContext || this;

      var swipeThr = threshold || 35;
      var swipeTim = timeout || 350;

      var swipeSP = 0;
      var swipeST = 0;
      var swipeEP = 0;
      var swipeET = 0;

      function swipeStart(e) {
        e.preventDefault();
        swipeSP = $.mousePosition(e);
        swipeST = Date.now();
      }

      function swipeUpdate(e) {
        e.preventDefault();
        swipeEP = $.mousePosition(e);
        swipeET = Date.now();
      }

      function swipeEnd(e) {
        e.preventDefault();

        var xDif = (swipeSP.x - swipeEP.x);
        var yDif = (swipeSP.y - swipeEP.y);
        var x = (xDif * xDif);
        var y = (yDif * yDif);
        var swipeDist = Math.sqrt(x + y);
        var swipeTime = (swipeET - swipeST);
        var swipeDir = undefined;

        if (swipeDist > swipeThr && swipeTime < swipeTim) {
          if (Math.abs(xDif) > Math.abs(yDif)) {
            if (xDif > 0) {
              swipeDir = "left";
            } else {
              swipeDir = "right";
            }
          } else {
            if (yDif > 0) {
              swipeDir = "up";
            } else {
              swipeDir = "down";
            }
          }
          callback.call(self, swipeDir);
        }
      }

      this.canvas.addEventListener("touchstart", function(e) {
        swipeStart(e);
      });
      this.canvas.addEventListener("touchmove", function(e) {
        swipeUpdate(e);
      });
      this.canvas.addEventListener("touchend", function(e) {
        swipeEnd(e);
      });
      this.canvas.addEventListener("mousedown", function(e) {
        swipeStart(e);
      });
      this.canvas.addEventListener("mousemove", function(e) {
        swipeUpdate(e);
      });
      this.canvas.addEventListener("mouseup", function(e) {
        swipeEnd(e);
      });

      return this;
    },

    onKeyDown: function(callback) {
      var self = this.tempContext || this;

      document.addEventListener("keydown", function(e) {
        if (e.which >= 48 && e.which <= 90) var keyName = String.fromCharCode(e.which).toLowerCase();
        else var keyName = $.keycodes[e.which];
        callback.call(self, keyName);
      });
      return this;
    },

    onKeyUp: function(callback) {
      var self = this.tempContext || this;

      document.addEventListener("keyup", function(e) {
        if (e.which >= 48 && e.which <= 90) var keyName = String.fromCharCode(e.which).toLowerCase();
        else var keyName = $.keycodes[e.which];
        callback.call(self, keyName);
      });
      return this;
    },


    onResize: function(callback) {
      var self = this.tempContext || this;

      window.addEventListener("resize", function() {
        callback.call(self, window.innerWidth, window.innerHeight);
      });

      callback.call(self, window.innerWidth, window.innerHeight);

      return this;
    },

    onDropImage: function(callback) {
      var self = this.tempContext || this;

      document.addEventListener('drop', function(e) {
        e.stopPropagation();
        e.preventDefault();

        var file = e.dataTransfer.files[0];

        if (!(/image/i).test(file.type)) return false;
        var reader = new FileReader();

        reader.onload = function(e) {
          var image = new Image;

          image.onload = function() {
            callback.call(self, this);
          };

          image.src = e.target.result;
        };

        reader.readAsDataURL(file);

      });

      document.addEventListener("dragover", function(e) {
        e.preventDefault();
      });

      return this;
    }

  };

  /* extend wrapper with drawing context methods */

  var methods = ["arc", "arcTo", "beginPath", "bezierCurveTo", "clearRect", "clip", "closePath", "createImageData", "createLinearGradient", "createRadialGradient", "createPattern", "drawFocusRing", "drawImage", "fill", "fillRect", "fillText", "getImageData", "isPointInPath", "lineTo", "measureText", "moveTo", "putImageData", "quadraticCurveTo", "rect", "restore", "rotate", "save", "scale", "setTransform", "stroke", "strokeRect", "strokeText", "transform", "translate"];
  for (var i = 0; i < methods.length; i++) {
    var name = methods[i];
    if (!$.Wrapper.prototype[name]) $.Wrapper.prototype[name] = Function("this.context." + name + ".apply(this.context, arguments); return this;");
  };

  /* create setters and getters */

  var properties = ["canvas", "fillStyle", "font", "globalAlpha", "globalCompositeOperation", "lineCap", "lineJoin", "lineWidth", "miterLimit", "shadowOffsetX", "shadowOffsetY", "shadowBlur", "shadowColor", "strokeStyle", "textAlign", "textBaseline"];
  for (var i = 0; i < properties.length; i++) {
    var name = properties[i];
    if (!$.Wrapper.prototype[name]) $.Wrapper.prototype[name] = Function("if(arguments.length) { this.context." + name + " = arguments[0]; return this; } else { return this.context." + name + "; }");
  };

  /* color */

  $.Color = function(data, type) {
    if (arguments.length) this.parse(data);
  }

  $.Color.prototype = {
    parse: function(args, type) {
      if (args[0] instanceof $.Color) {
        this[0] = args[0][0];
        this[1] = args[0][1];
        this[2] = args[0][2];
        this[3] = args[0][3];
        return;
      }

      if (typeof args === "string") {
        var match = null;

        if (args[0] === "#") {
          var rgb = $.hexToRgb(args);
          this[0] = rgb[0];
          this[1] = rgb[1];
          this[2] = rgb[2];
          this[3] = 1.0;
        } else if (match = args.match(/rgb\((.*),(.*),(.*)\)/)) {
          this[0] = match[1] | 0;
          this[1] = match[2] | 0;
          this[2] = match[3] | 0;
          this[3] = 1.0;
        } else if (match = args.match(/rgba\((.*),(.*),(.*)\)/)) {
          this[0] = match[1] | 0;
          this[1] = match[2] | 0;
          this[2] = match[3] | 0;
          this[3] = match[4] | 0;
        } else if (match = args.match(/hsl\((.*),(.*),(.*)\)/)) {
          this.fromHsl(match[1], match[2], match[3]);
        } else if (match = args.match(/hsv\((.*),(.*),(.*)\)/)) {
          this.fromHsv(match[1], match[2], match[3]);
        }
      } else {
        switch (type) {
          case "hsl":
          case "hsla":

            this.fromHsl(args[0], args[1], args[2], args[3]);
            break;

          case "hsv":
          case "hsva":

            this.fromHsv(args[0], args[1], args[2], args[3]);
            break;

          default:
            this[0] = args[0];
            this[1] = args[1];
            this[2] = args[2];
            this[3] = typeof args[3] === "undefined" ? 1.0 : args[3];
            break;
        }
      }
    },

    fromHsl: function() {
      var components = arguments[0] instanceof Array ? arguments[0] : arguments;
      var color = $.hslToRgb(components[0], components[1], components[2]);

      this[0] = color[0];
      this[1] = color[1];
      this[2] = color[2];
      this[3] = typeof arguments[3] === "undefined" ? 1.0 : arguments[3];
    },

    fromHsv: function() {
      var components = arguments[0] instanceof Array ? arguments[0] : arguments;
      var color = $.hsvToRgb(components[0], components[1], components[2]);

      this[0] = color[0];
      this[1] = color[1];
      this[2] = color[2];
      this[3] = typeof arguments[3] === "undefined" ? 1.0 : arguments[3];
    },

    toArray: function() {
      return [this[0], this[1], this[2], this[3]];
    },

    toRgb: function() {
      return "rgb(" + this[0] + ", " + this[1] + ", " + this[2] + ")";
    },

    toRgba: function() {
      return "rgba(" + this[0] + ", " + this[1] + ", " + this[2] + ", " + this[3] + ")";
    },

    toHex: function() {
      return $.rgbToHex(this[0], this[1], this[2]);
    },

    toHsl: function() {
      var c = $.rgbToHsl(this[0], this[1], this[2]);
      c[3] = this[3];
      return c;
    },

    toHsv: function() {
      var c = $.rgbToHsv(this[0], this[1], this[2]);
      c[3] = this[3];
      return c;
    },

    gradient: function(target, steps) {
      var targetColor = $.color(target);
    },

    shiftHsl: function() {
      var hsl = this.toHsl();

      var h = arguments[0] === null ? hsl[0] : $.wrapValue(hsl[0] + arguments[0], 0, 1);
      var s = arguments[1] === null ? hsl[1] : $.limitValue(hsl[1] + arguments[1], 0, 1);
      var l = arguments[2] === null ? hsl[2] : $.limitValue(hsl[2] + arguments[2], 0, 1);

      this.fromHsl(h, s, l);

      return this;
    },

    setHsl: function() {
      var hsl = this.toHsl();

      var h = arguments[0] === null ? hsl[0] : $.limitValue(arguments[0], 0, 1);
      var s = arguments[1] === null ? hsl[1] : $.limitValue(arguments[1], 0, 1);
      var l = arguments[2] === null ? hsl[2] : $.limitValue(arguments[2], 0, 1);

      this.fromHsl(h, s, l);

      return this;
    }

  };

  window["cq"] = window["CanvasQuery"] = $;

  if (typeof define === "function" && define.amd) {
    define([], function() {
      return $;
    });
  }

})(window);