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35 lines
520 B
35 lines
520 B
// Outputs luminance (grayscale) of the input image _MainTex |
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Shader "Hidden/Contrast Stretch Luminance" { |
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Properties { |
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_MainTex ("Base (RGB)", 2D) = "white" {} |
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} |
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Category { |
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SubShader { |
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Pass { |
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ZTest Always Cull Off ZWrite Off |
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CGPROGRAM |
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#pragma vertex vert_img |
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#pragma fragment frag |
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#include "UnityCG.cginc" |
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uniform sampler2D _MainTex; |
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float4 frag (v2f_img i) : SV_Target |
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{ |
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float4 col = tex2D(_MainTex, i.uv); |
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col.rgb = Luminance(col.rgb) * (1+col.a*2); |
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return col; |
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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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Fallback off |
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}
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