Shader "DynamicShadowProjector/Blit/Downsample" {
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Properties {
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_MainTex ("Base (RGB)", 2D) = "white" {}
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}
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CGINCLUDE
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#include "Downsample.cginc"
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ENDCG
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SubShader {
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ZTest Always Cull Off ZWrite Off
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Fog { Mode Off }
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// pass 0: downsample
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Pass {
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CGPROGRAM
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#pragma vertex vert_downsample
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#pragma fragment frag_downsample
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ENDCG
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}
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// pass 1: downsample with shadow color
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Pass {
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CGPROGRAM
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#pragma vertex vert_downsample
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#pragma fragment frag_downsample_withShadowColor
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ENDCG
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}
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// pass 2: blit
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Pass {
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CGPROGRAM
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#pragma vertex vert_blit
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#pragma fragment frag_blit
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ENDCG
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}
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// pass 3: blit with shadow color
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Pass {
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CGPROGRAM
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#pragma vertex vert_blit
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#pragma fragment frag_blit_withShadowColor
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ENDCG
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}
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// pass 4: downsample with blur
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Pass {
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CGPROGRAM
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#pragma vertex vert_blit
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#pragma fragment frag_downsample_with_blur
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ENDCG
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}
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// pass 5: downsample with blur for mipmap
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Pass {
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CGPROGRAM
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#pragma vertex vert_blit
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#pragma fragment frag_downsample_with_blur_lod
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#pragma target 3.0
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fixed4 frag_downsample_with_blur_lod(v2f_blit i) : COLOR
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{
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fixed4 uv;
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uv.xy = i.uv0 + _Offset0.xy;
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uv.zw = 0;
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fixed4 c0 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset1.xy;
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fixed4 c1 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset2.xy;
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fixed4 c2 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset3.xy;
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fixed4 c3 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset0.xw;
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fixed4 color = _Weight.x * c0;
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c0 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset1.xw;
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color += _Weight.y * c1;
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c1 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset2.xw;
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color += _Weight.z * c2;
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c2 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset3.xw;
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color += _Weight.w * c3;
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c3 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset0.zy;
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color += _Weight.x * c0;
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c0 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset1.zy;
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color += _Weight.y * c1;
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c1 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset2.zy;
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color += _Weight.z * c2;
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c2 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset3.zy;
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color += _Weight.w * c3;
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c3 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset0.zw;
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color += _Weight.x * c0;
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c0 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset1.zw;
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color += _Weight.y * c1;
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c1 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset2.zw;
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color += _Weight.z * c2;
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c2 = tex2Dlod(_MainTex, uv);
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uv.xy = i.uv0 + _Offset3.zw;
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color += _Weight.w * c3;
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c3 = tex2Dlod(_MainTex, uv);
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color += _Weight.x * c0;
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color += _Weight.y * c1;
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color += _Weight.z * c2;
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color += _Weight.w * c3;
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return color;
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}
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ENDCG
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}
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}
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Fallback "Hidden/DynamicShadowProjector/Blit/DownsampleFallback"
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}
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