/**
 * @author Mat Groves http://matgroves.com/
 */
var PIXI = PIXI || {};
	
PIXI.shaderFragmentSrc = [	"precision mediump float;",
					  		"varying vec2 vTextureCoord;",
					  		"varying float vColor;",
					  		"uniform sampler2D uSampler;",
					  		"void main(void) {",
					  		"gl_FragColor = texture2D(uSampler, vec2(vTextureCoord.x, vTextureCoord.y));",
					  		"gl_FragColor = gl_FragColor * vColor;",
					  		"}"];

PIXI.shaderVertexSrc = [	"attribute vec2 aVertexPosition;",
	    					"attribute vec2 aTextureCoord;",
	    					"attribute float aColor;",
	  						"uniform mat4 uMVMatrix;",
							"varying vec2 vTextureCoord;",
							"varying float vColor;",
							"void main(void) {",
							"gl_Position = uMVMatrix * vec4(aVertexPosition, 1.0, 1.0);",
							"vTextureCoord = aTextureCoord;",
							"vColor = aColor;",
	   					 	"}"]

PIXI.CompileVertexShader = function(gl, shaderSrc)
{
	var src = "";
	
	for (var i=0; i < shaderSrc.length; i++) {
	  src += shaderSrc[i];
	};
	
	var shader;
    shader = gl.createShader(gl.VERTEX_SHADER);
       
    gl.shaderSource(shader, src);
    gl.compileShader(shader);

    if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
        alert(gl.getShaderInfoLog(shader));
        return null;
    }
    
    return shader;
}

PIXI.CompileFragmentShader = function(gl, shaderSrc)
{
	var src = "";
	
	for (var i=0; i < shaderSrc.length; i++) {
	  src += shaderSrc[i];
	};
	
	var shader;
    shader = gl.createShader(gl.FRAGMENT_SHADER);
        
    gl.shaderSource(shader, src);
    gl.compileShader(shader);
	
    if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
        alert(gl.getShaderInfoLog(shader));
        return null;
    }
    
    return shader;
}