dither stuff

1 files changed, 1767 insertions, 0 deletions

diff --git a/canvasquery.js b/canvasquery.js
new file mode 100644
index 0000000..a5b36f3
--- /dev/null
+++ b/canvasquery.js
@@ -0,0 +1,1767 @@
+/*     
+  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);