43 lines
816 B
Plaintext
43 lines
816 B
Plaintext
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Shader "MY/Grayscale"
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{
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Properties
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{
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_MainTex("Base (RGB)", 2D) = "white" {}
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_RampTex("Base (RGB)", 2D) = "grayscaleRamp" {}
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}
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SubShader
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{
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Tags{"Queue" = "Geometry" "IgnoreProjector" = "True"}
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Pass
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{
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ZTest Always Cull Off ZWrite Off
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Fog { Mode 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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#pragma fragmentoption ARB_precision_hint_fastest
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#include "UnityCG.cginc"
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uniform sampler2D _MainTex;
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uniform sampler2D _RampTex;
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uniform half _RampOffset;
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fixed4 frag(v2f_img i) : COLOR
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{
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fixed4 original = tex2D(_MainTex, i.uv);
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fixed grayscale = Luminance(original.rgb);
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half2 remap = half2 (grayscale + _RampOffset, .5);
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fixed4 output = tex2D(_RampTex, remap);
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output.a = original.a;
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return output;
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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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