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/**
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 * @author alteredq / http://alteredqualia.com/
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 */
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THREE.FilmPass = function ( noiseIntensity, scanlinesIntensity, scanlinesCount, grayscale ) {
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	var shader = THREE.ShaderExtras[ "film" ];
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	this.uniforms = THREE.UniformsUtils.clone( shader.uniforms );
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	this.material = new THREE.ShaderMaterial( {
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		uniforms: this.uniforms,
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		vertexShader: shader.vertexShader,
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		fragmentShader: shader.fragmentShader
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	} );
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	if ( grayscale !== undefined )	this.uniforms.grayscale.value = grayscale;
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	if ( noiseIntensity !== undefined ) this.uniforms.nIntensity.value = noiseIntensity;
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	if ( scanlinesIntensity !== undefined ) this.uniforms.sIntensity.value = scanlinesIntensity;
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	if ( scanlinesCount !== undefined ) this.uniforms.sCount.value = scanlinesCount;
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	this.enabled = true;
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	this.renderToScreen = false;
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	this.needsSwap = true;
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};
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THREE.FilmPass.prototype = {
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	render: function ( renderer, writeBuffer, readBuffer, delta ) {
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		this.uniforms[ "tDiffuse" ].texture = readBuffer;
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		this.uniforms[ "time" ].value += delta;
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		THREE.EffectComposer.quad.material = this.material;
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		if ( this.renderToScreen ) {
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			renderer.render( THREE.EffectComposer.scene, THREE.EffectComposer.camera );
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		} else {
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			renderer.render( THREE.EffectComposer.scene, THREE.EffectComposer.camera, writeBuffer, false );
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		}
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	}
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};
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