text: /*
  * ColorMatrix
  * Visit http://createjs.com/ for documentation, updates and examples.
  *
  * Copyright (c) 2010 gskinner.com, inc.
  *
  * Permission is hereby granted, free of charge, to any person
  * obtaining a copy of this software and associated documentation
  * files (the "Software"), to deal in the Software without
  * restriction, including without limitation the rights to use,
  * copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following
  * conditions:
  *
  * The above copyright notice and this permission notice shall be
  * included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */
  
  /**
   * @module EaselJS
   */
  
  // namespace:
  this.createjs = this.createjs||{};
  
  (function() {
  	"use strict";
  
  	/**
  	 * Provides helper functions for assembling a matrix for use with the {{#crossLink "ColorMatrixFilter"}}{{/crossLink}},
  	 * or can be used directly as the matrix for a ColorMatrixFilter. Most methods return the instance to facilitate
  	 * chained calls.
  	 *
  	 * <h4>Example</h4>
  	 *      myColorMatrix.adjustHue(20).adjustBrightness(50);
  	 *
  	 * See {{#crossLink "Filter"}}{{/crossLink}} for an example of how to apply filters, or {{#crossLink "ColorMatrixFilter"}}{{/crossLink}}
  	 * for an example of how to use ColorMatrix to change a DisplayObject's color.
  	 * @class ColorMatrix
  	 * @param {Number} brightness
  	 * @param {Number} contrast
  	 * @param {Number} saturation
  	 * @param {Number} hue
  	 * @constructor
  	 **/
  	var ColorMatrix = function(brightness, contrast, saturation, hue) {
  	  this.initialize(brightness, contrast, saturation, hue);
  	};
  	var p = ColorMatrix.prototype;
  
  	/**
  	 * Array of delta values for contrast calculations.
  	 * @property DELTA_INDEX
  	 * @type Array
  	 * @protected
  	 * @static
  	 **/
  	ColorMatrix.DELTA_INDEX = [
  		0,    0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1,  0.11,
  		0.12, 0.14, 0.15, 0.16, 0.17, 0.18, 0.20, 0.21, 0.22, 0.24,
  		0.25, 0.27, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42,
  		0.44, 0.46, 0.48, 0.5,  0.53, 0.56, 0.59, 0.62, 0.65, 0.68,
  		0.71, 0.74, 0.77, 0.80, 0.83, 0.86, 0.89, 0.92, 0.95, 0.98,
  		1.0,  1.06, 1.12, 1.18, 1.24, 1.30, 1.36, 1.42, 1.48, 1.54,
  		1.60, 1.66, 1.72, 1.78, 1.84, 1.90, 1.96, 2.0,  2.12, 2.25,
  		2.37, 2.50, 2.62, 2.75, 2.87, 3.0,  3.2,  3.4,  3.6,  3.8,
  		4.0,  4.3,  4.7,  4.9,  5.0,  5.5,  6.0,  6.5,  6.8,  7.0,
  		7.3,  7.5,  7.8,  8.0,  8.4,  8.7,  9.0,  9.4,  9.6,  9.8,
  		10.0
  	];
  
  	/**
  	 * Identity matrix values.
  	 * @property IDENTITY_MATRIX
  	 * @type Array
  	 * @protected
  	 * @static
  	 **/
  	ColorMatrix.IDENTITY_MATRIX = [
  		1,0,0,0,0,
  		0,1,0,0,0,
  		0,0,1,0,0,
  		0,0,0,1,0,
  		0,0,0,0,1
  	];
  
  	/**
  	 * The constant length of a color matrix.
  	 * @property LENGTH
  	 * @type Number
  	 * @protected
  	 * @static
  	 **/
  	ColorMatrix.LENGTH = ColorMatrix.IDENTITY_MATRIX.length;
  
  
  	/**
  	 * Initialization method.
  	 * @method initialize
  	 * @param {Number} brightness
  	 * @param {Number} contrast
  	 * @param {Number} saturation
  	 * @param {Number} hue
  	 * @protected
  	 */
  	p.initialize = function(brightness,contrast,saturation,hue) {
  		this.reset();
  		this.adjustColor(brightness,contrast,saturation,hue);
  		return this;
  	};
  
  	/**
  	 * Resets the matrix to identity values.
  	 * @method reset
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 */
  	p.reset = function() {
  		return this.copyMatrix(ColorMatrix.IDENTITY_MATRIX);
  	};
  
  	/**
  	 * Shortcut method to adjust brightness, contrast, saturation and hue.
  	 * Equivalent to calling adjustHue(hue), adjustContrast(contrast),
  	 * adjustBrightness(brightness), adjustSaturation(saturation), in that order.
  	 * @method adjustColor
  	 * @param {Number} brightness
  	 * @param {Number} contrast
  	 * @param {Number} saturation
  	 * @param {Number} hue
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.adjustColor = function(brightness,contrast,saturation,hue) {
  		this.adjustHue(hue);
  		this.adjustContrast(contrast);
  		this.adjustBrightness(brightness);
  		return this.adjustSaturation(saturation);
  	};
  
  	/**
  	 * Adjusts the brightness of pixel color by adding the specified value to the red, green and blue channels.
  	 * Positive values will make the image brighter, negative values will make it darker.
  	 * @method adjustBrightness
  	 * @param {Number} value A value between -255 & 255 that will be added to the RGB channels.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.adjustBrightness = function(value) {
  		if (value == 0 || isNaN(value)) { return this; }
  		value = this._cleanValue(value,255);
  		this._multiplyMatrix([
  			1,0,0,0,value,
  			0,1,0,0,value,
  			0,0,1,0,value,
  			0,0,0,1,0,
  			0,0,0,0,1
  		]);
  		return this;
  	};
  
  	/**
  	 * Adjusts the contrast of pixel color.
  	 * Positive values will increase contrast, negative values will decrease contrast.
  	 * @method adjustContrast
  	 * @param {Number} value A value between -100 & 100.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.adjustContrast = function(value) {
  		if (value == 0 || isNaN(value)) { return this; }
  		value = this._cleanValue(value,100);
  		var x;
  		if (value<0) {
  			x = 127+value/100*127;
  		} else {
  			x = value%1;
  			if (x == 0) {
  				x = ColorMatrix.DELTA_INDEX[value];
  			} else {
  				x = ColorMatrix.DELTA_INDEX[(value<<0)]*(1-x)+ColorMatrix.DELTA_INDEX[(value<<0)+1]*x; // use linear interpolation for more granularity.
  			}
  			x = x*127+127;
  		}
  		this._multiplyMatrix([
  			x/127,0,0,0,0.5*(127-x),
  			0,x/127,0,0,0.5*(127-x),
  			0,0,x/127,0,0.5*(127-x),
  			0,0,0,1,0,
  			0,0,0,0,1
  		]);
  		return this;
  	};
  
  	/**
  	 * Adjusts the color saturation of the pixel.
  	 * Positive values will increase saturation, negative values will decrease saturation (trend towards greyscale).
  	 * @method adjustSaturation
  	 * @param {Number} value A value between -100 & 100.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.adjustSaturation = function(value) {
  		if (value == 0 || isNaN(value)) { return this; }
  		value = this._cleanValue(value,100);
  		var x = 1+((value > 0) ? 3*value/100 : value/100);
  		var lumR = 0.3086;
  		var lumG = 0.6094;
  		var lumB = 0.0820;
  		this._multiplyMatrix([
  			lumR*(1-x)+x,lumG*(1-x),lumB*(1-x),0,0,
  			lumR*(1-x),lumG*(1-x)+x,lumB*(1-x),0,0,
  			lumR*(1-x),lumG*(1-x),lumB*(1-x)+x,0,0,
  			0,0,0,1,0,
  			0,0,0,0,1
  		]);
  		return this;
  	};
  
  
  	/**
  	 * Adjusts the hue of the pixel color.
  	 * @method adjustHue
  	 * @param {Number} value A value between -180 & 180.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.adjustHue = function(value) {
  		if (value == 0 || isNaN(value)) { return this; }
  		value = this._cleanValue(value,180)/180*Math.PI;
  		var cosVal = Math.cos(value);
  		var sinVal = Math.sin(value);
  		var lumR = 0.213;
  		var lumG = 0.715;
  		var lumB = 0.072;
  		this._multiplyMatrix([
  			lumR+cosVal*(1-lumR)+sinVal*(-lumR),lumG+cosVal*(-lumG)+sinVal*(-lumG),lumB+cosVal*(-lumB)+sinVal*(1-lumB),0,0,
  			lumR+cosVal*(-lumR)+sinVal*(0.143),lumG+cosVal*(1-lumG)+sinVal*(0.140),lumB+cosVal*(-lumB)+sinVal*(-0.283),0,0,
  			lumR+cosVal*(-lumR)+sinVal*(-(1-lumR)),lumG+cosVal*(-lumG)+sinVal*(lumG),lumB+cosVal*(1-lumB)+sinVal*(lumB),0,0,
  			0,0,0,1,0,
  			0,0,0,0,1
  		]);
  		return this;
  	};
  
  	/**
  	 * Concatenates (multiplies) the specified matrix with this one.
  	 * @method concat
  	 * @param {Array} matrix An array or ColorMatrix instance.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.concat = function(matrix) {
  		matrix = this._fixMatrix(matrix);
  		if (matrix.length != ColorMatrix.LENGTH) { return this; }
  		this._multiplyMatrix(matrix);
  		return this;
  	};
  
  	/**
  	 * Returns a clone of this ColorMatrix.
  	 * @method clone
  	 * @return {ColorMatrix} A clone of this ColorMatrix.
  	 **/
  	p.clone = function() {
  		return (new ColorMatrix()).copyMatrix(this);
  	};
  
  	/**
  	 * Return a length 25 (5x5) array instance containing this matrix's values.
  	 * @method toArray
  	 * @return {Array} An array holding this matrix's values.
  	 **/
  	p.toArray = function() {
  		var arr = [];
  		for (var i= 0, l=ColorMatrix.LENGTH; i<l; i++) {
  			arr[i] = this[i];
  		}
  		return arr;
  	};
  
  	/**
  	 * Copy the specified matrix's values to this matrix.
  	 * @method copyMatrix
  	 * @param {Array} matrix An array or ColorMatrix instance.
  	 * @return {ColorMatrix} The ColorMatrix instance the method is called on (useful for chaining calls.)
  	 **/
  	p.copyMatrix = function(matrix) {
  		var l = ColorMatrix.LENGTH;
  		for (var i=0;i<l;i++) {
  			this[i] = matrix[i];
  		}
  		return this;
  	};
  	
  	/**
  	 * Returns a string representation of this object.
  	 * @method toString
  	 * @return {String} a string representation of the instance.
  	 **/
  	p.toString = function() {
  		return "[ColorMatrix]";
  	};
  
  // private methods:
  
  	/**
  	 * @method _multiplyMatrix
  	 * @param {Array} matrix
  	 * @protected
  	 **/
  	p._multiplyMatrix = function(matrix) {
  		var col = [];
  
  		for (var i=0;i<5;i++) {
  			for (var j=0;j<5;j++) {
  				col[j] = this[j+i*5];
  			}
  			for (var j=0;j<5;j++) {
  				var val=0;
  				for (var k=0;k<5;k++) {
  					val += matrix[j+k*5]*col[k];
  				}
  				this[j+i*5] = val;
  			}
  		}
  	};
  
  	/**
  	 * Make sure values are within the specified range, hue has a limit of 180, brightness is 255, others are 100.
  	 * @method _cleanValue
  	 * @param {Number} value The raw number
  	 * @param {Number} limit The maximum that the number can be. The minimum is the limit * -1.
  	 * @protected
  	 **/
  	p._cleanValue = function(value, limit) {
  		return Math.min(limit,Math.max(-limit,value));
  	};
  
  	//
  	/**
  	 * Makes sure matrixes are 5x5 (25 long).
  	 * @method _fixMatrix
  	 * @param {Array} matrix
  	 * @protected
  	 **/
  	p._fixMatrix = function(matrix) {
  		if (matrix instanceof ColorMatrix) { matrix = matrix.toArray(); }
  		if (matrix.length < ColorMatrix.LENGTH) {
  			matrix = matrix.slice(0,matrix.length).concat(ColorMatrix.IDENTITY_MATRIX.slice(matrix.length,ColorMatrix.LENGTH));
  		} else if (matrix.length > ColorMatrix.LENGTH) {
  			matrix = matrix.slice(0,ColorMatrix.LENGTH);
  		}
  		return matrix;
  	};
  
  	createjs.ColorMatrix = ColorMatrix;
  
  }());
  