/**
 * @author Mat Groves http://matgroves.com/ @Doormat23
 */



PIXI.SmartBlurFilter = function()
{
	PIXI.AbstractFilter.call( this );
	
	this.passes = [this];
	
	// set the uniforms
	this.uniforms = {
		blur: {type: 'f', value: 1/512},
	};
	
	this.fragmentSrc = [
	  "precision mediump float;",
 	  "varying vec2 vTextureCoord;",
  	  "uniform sampler2D uSampler;",
    //  "uniform vec2 delta;",
      "const vec2 delta = vec2(1.0/10.0, 0.0);",
     // "uniform float darkness;",
	  
	  "float random(vec3 scale, float seed) {",
	        "return fract(sin(dot(gl_FragCoord.xyz + seed, scale)) * 43758.5453 + seed);",
	   "}",
	   
	   
	  "void main(void) {",
	 
	  "vec4 color = vec4(0.0);",
	  "float total = 0.0;",
	  
	  "float offset = random(vec3(12.9898, 78.233, 151.7182), 0.0);",
	            
	  "for (float t = -30.0; t <= 30.0; t++) {",
	           "float percent = (t + offset - 0.5) / 30.0;",
	                "float weight = 1.0 - abs(percent);",
	                "vec4 sample = texture2D(uSampler, vTextureCoord + delta * percent);",
	                "sample.rgb *= sample.a;",
	                "color += sample * weight;",
	                "total += weight;",
	            "}",
	            
	            "gl_FragColor = color / total;",
	            "gl_FragColor.rgb /= gl_FragColor.a + 0.00001;",
	          //  "gl_FragColor.rgb *= darkness;",
	  "}"
	];
}

PIXI.SmartBlurFilter.prototype = Object.create( PIXI.AbstractFilter.prototype );
PIXI.SmartBlurFilter.prototype.constructor = PIXI.SmartBlurFilter;

Object.defineProperty(PIXI.SmartBlurFilter.prototype, 'blur', {
    get: function() {
        return this.uniforms.blur.value;
    },
    set: function(value) {
    	this.uniforms.blur.value = value;
    }
});