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39 lines
793 B
39 lines
793 B
Shader "Hidden/SimpleContrastNode"
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{
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Properties
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{
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_A ( "_RBG", 2D ) = "white" {}
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_B ( "_Fraction", 2D ) = "white" {}
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}
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SubShader
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{
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Pass
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{
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CGPROGRAM
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#include "UnityCG.cginc"
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#pragma vertex vert_img
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#pragma fragment frag
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uniform sampler2D _A;
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uniform sampler2D _B;
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float4 CalculateContrast ( float contrastValue, float4 colorTarget )
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{
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float t = 0.5 * ( 1.0 - contrastValue );
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return mul ( float4x4( contrastValue, 0, 0, t, 0, contrastValue, 0, t, 0, 0, contrastValue, t, 0, 0, 0, 1 ), colorTarget );
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}
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float4 frag ( v2f_img i ) : SV_Target
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{
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float4 rgba = tex2D ( _B, i.uv );
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float value = tex2D ( _A, i.uv ).r;
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float4 finalColor = CalculateContrast( value , rgba );
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return finalColor;
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}
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ENDCG
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}
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}
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}
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