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colorfilter/data/filters/contrast

 

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!!ARBfp1.0

 

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TEMP output;

 

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TEMP input;

 

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TEMP bright;

 

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TEMP dark;

 

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TEX input, fragment.texcoord[0], texture[0], RECT;

 

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# Subtract color by 0.51 => everything with more then 0.51 will have at least 0 ;

 

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SUB output.rgb, input, 0.51;

 

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# Create a dark color..;

 

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SUB dark.rgb, input, 0.3;

 

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# ..and a bright color ;

 

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ADD bright.rgb, input, 0.3;

 

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# All colors which are < 0 (original color - 0.51 < 0) get a dark color and everything else a bright color ;

 

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CMP output.rgb, output, dark, bright;

 

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MOV result.color, output;

 

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END

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