package com.marshalchen.common.uimodule.imageprocessing.filter.blend;
import com.marshalchen.common.uimodule.imageprocessing.filter.MultiInputFilter;
/**
* Applies a saturation blend of two images
* @author Chris Batt
*/
public class ScreenBlendFilter extends MultiInputFilter {
public ScreenBlendFilter() {
super(2);
}
@Override
protected String getFragmentShader() {
return
"precision mediump float;\n"
+"uniform sampler2D "+UNIFORM_TEXTURE0+";\n"
+"uniform sampler2D "+UNIFORM_TEXTUREBASE+1+";\n"
+"varying vec2 "+VARYING_TEXCOORD+";\n"
+"void main(){\n"
+" vec4 color1 = texture2D("+UNIFORM_TEXTURE0+","+VARYING_TEXCOORD+");\n"
+" vec4 color2 = texture2D("+UNIFORM_TEXTUREBASE+1+","+VARYING_TEXCOORD+");\n"
+" vec4 whiteColor = vec4(1.0);\n"
+" gl_FragColor = whiteColor - ((whiteColor - color2) * (whiteColor - color1));\n"
+"}\n";
}
}