#

API Documentation for: 1.0.0
Show: Inherited Protected Private Deprecated

# File:ColorMatrixFilter.js

    /*
    * ColorMatrixFilter
    * 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";

    // constructor:
    	/**
    	 * Allows you to carry out complex color operations such as modifying saturation, brightness, or inverting. See the
    	 * {{#crossLink "ColorMatrix"}}{{/crossLink}} for more information on changing colors. For an easier color transform,
    	 * consider the {{#crossLink "ColorFilter"}}{{/crossLink}}.
    	 *
    	 * <h4>Example</h4>
    	 * This example creates a red circle, inverts its hue, and then saturates it to brighten it up.
    	 *
    	 *      var shape = new createjs.Shape().set({x:100,y:100});
    	 *      shape.graphics.beginFill("#ff0000").drawCircle(0,0,50);
    	 *
    	 *      var matrix = new createjs.ColorMatrix().adjustHue(180).adjustSaturation(100);
    	 *      shape.filters = [
    	 *          new createjs.ColorMatrixFilter(matrix)
    	 *      ];
    	 *
    	 *      shape.cache(-50, -50, 100, 100);
    	 *
    	 * See {{#crossLink "Filter"}}{{/crossLink}} for an more information on applying filters.
    	 * @class ColorMatrixFilter
    	 * @constructor
    	 * @extends Filter
    	 * @param {Array | ColorMatrix} matrix A 4x5 matrix describing the color operation to perform. See also the {{#crossLink "ColorMatrix"}}{{/crossLink}}
    	 * class.
    	 **/
    	function ColorMatrixFilter(matrix) {
    		this.Filter_constructor();

    	// public properties:
    		/**
    		 * A 4x5 matrix describing the color operation to perform. See also the {{#crossLink "ColorMatrix"}}{{/crossLink}}
    		 * @property matrix
    		 * @type Array | ColorMatrix
    		 **/
    		this.matrix = matrix;

    		this.FRAG_SHADER_BODY = (
    			"uniform mat4 uColorMatrix;" +
    			"uniform vec4 uColorMatrixOffset;" +

    			"void main(void) {" +
    				"vec4 color = texture2D(uSampler, vRenderCoord);" +

    				"mat4 m = uColorMatrix;" +
    				"vec4 newColor = vec4(0,0,0,0);" +
    				"newColor.r = color.r*m[0][0] + color.g*m[0][1] + color.b*m[0][2] + color.a*m[0][3];" +
    				"newColor.g = color.r*m[1][0] + color.g*m[1][1] + color.b*m[1][2] + color.a*m[1][3];" +
    				"newColor.b = color.r*m[2][0] + color.g*m[2][1] + color.b*m[2][2] + color.a*m[2][3];" +
    				"newColor.a = color.r*m[3][0] + color.g*m[3][1] + color.b*m[3][2] + color.a*m[3][3];" +

    				"gl_FragColor = newColor + uColorMatrixOffset;" +
    			"}"
    		);
    	}
    	var p = createjs.extend(ColorMatrixFilter, createjs.Filter);

    	// TODO: deprecated
    	// p.initialize = function() {}; // searchable for devs wondering where it is. REMOVED. See docs for details.

    	/** docced in super class **/
    	p.shaderParamSetup = function(gl, stage, shaderProgram) {
    		var mat = this.matrix;
    		var colorMatrix = new Float32Array([
    			mat[0],mat[1],mat[2],mat[3],
    			mat[5],mat[6],mat[7],mat[8],
    			mat[10],mat[11],mat[12],mat[13],
    			mat[15],mat[16],mat[17],mat[18]
    		]);

    		gl.uniformMatrix4fv(
    			gl.getUniformLocation(shaderProgram, "uColorMatrix"),
    			false, colorMatrix
    		);
    		gl.uniform4f(
    			gl.getUniformLocation(shaderProgram, "uColorMatrixOffset"),
    			mat[4]/255, mat[9]/255, mat[14]/255, mat[19]/255
    		);
    	};

    // public methods:
    	/** docced in super class **/
    	p.toString = function() {
    		return "[ColorMatrixFilter]";
    	};

    	/** docced in super class **/
    	p.clone = function() {
    		return new ColorMatrixFilter(this.matrix);
    	};

    // private methods:
    	/** docced in super class **/
    	p._applyFilter = function(imageData) {
    		var data = imageData.data;
    		var l = data.length;
    		var r,g,b,a;
    		var mtx = this.matrix;
    		var m0 =  mtx[0],  m1 =  mtx[1],  m2 =  mtx[2],  m3 =  mtx[3],  m4 =  mtx[4];
    		var m5 =  mtx[5],  m6 =  mtx[6],  m7 =  mtx[7],  m8 =  mtx[8],  m9 =  mtx[9];
    		var m10 = mtx[10], m11 = mtx[11], m12 = mtx[12], m13 = mtx[13], m14 = mtx[14];
    		var m15 = mtx[15], m16 = mtx[16], m17 = mtx[17], m18 = mtx[18], m19 = mtx[19];

    		for (var i=0; i<l; i+=4) {
    			r = data[i];
    			g = data[i+1];
    			b = data[i+2];
    			a = data[i+3];
    			data[i] = r*m0+g*m1+b*m2+a*m3+m4; // red
    			data[i+1] = r*m5+g*m6+b*m7+a*m8+m9; // green
    			data[i+2] = r*m10+g*m11+b*m12+a*m13+m14; // blue
    			data[i+3] = r*m15+g*m16+b*m17+a*m18+m19; // alpha
    		}
    		return true;
    	};

    	createjs.ColorMatrixFilter = createjs.promote(ColorMatrixFilter, "Filter");
    }());