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98 行
2.3 KiB
98 行
2.3 KiB
Shader "Hidden/SRP_Core/TextureCombiner"
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{
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Properties
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{
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// Chanels are : r=0, g=1, b=2, a=3, greyscale from rgb = 4
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// If the chanel value is negative, we invert the value
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[Linear][NoScaleOffset] _RSource ("R Source", 2D) = "white" {}
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_RChannel ("R Channel", float) = 0
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_RRemap ("R Remap", Vector) = (0, 1, 0, 0)
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[Linear][NoScaleOffset] _GSource ("G Source", 2D) = "white" {}
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_GChannel ("G Channel", float) = 1
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_GRemap ("G Remap", Vector) = (0, 1, 0, 0)
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[Linear][NoScaleOffset] _BSource ("B Source", 2D) = "white" {}
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_BChannel ("B Channel", float) = 2
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_BRemap ("B Remap", Vector) = (0, 1, 0, 0)
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[Linear][NoScaleOffset] _ASource ("A Source", 2D) = "white" {}
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_AChannel ("A Channel", float) = 3
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_ARemap ("A Remap", Vector) = (0, 1, 0, 0)
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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LOD 100
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _RSource, _GSource, _BSource, _ASource;
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float _RChannel, _GChannel, _BChannel, _AChannel;
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float4 _RRemap, _GRemap, _BRemap, _ARemap;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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return o;
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}
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float PlotSourcetoChanel(float4 source, float param, float2 remap)
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{
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if (param < 0 )
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{
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param = -param;
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source = float4(1,1,1,1) - source;
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}
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float o;
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if (param >= 4)
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o = source.r * 0.3 + source.g * 0.59 + source.b * 0.11; // Photoshop desaturation : G*.59+R*.3+B*.11
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else
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o = source[param];
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return o * ( remap.y - remap.x) + remap.x ;
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}
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float PlotSourcetoChanel(float4 source, float param)
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{
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return PlotSourcetoChanel(source, param, float2(0,1) );
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}
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float4 frag (v2f i) : SV_Target
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{
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float4 col = float4(0,0,0,0);
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col.r = PlotSourcetoChanel( tex2D(_RSource, i.uv), _RChannel, _RRemap );
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col.g = PlotSourcetoChanel( tex2D(_GSource, i.uv), _GChannel, _GRemap );
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col.b = PlotSourcetoChanel( tex2D(_BSource, i.uv), _BChannel, _BRemap );
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col.a = PlotSourcetoChanel( tex2D(_ASource, i.uv), _AChannel, _ARemap );
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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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