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