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Assets/ResRaw/Shader/DualKawaseBlur.shader

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+Shader "Hidden/URP/DualKawaseBlur"
+{
+    SubShader
+    {
+        Tags { "RenderPipeline"="UniversalPipeline" }
+        ZWrite Off ZTest Always Cull Off
+
+        HLSLINCLUDE
+        #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+        // RenderGraph AddBlitPass 默认绑定的属性：
+        TEXTURE2D_X(_BlitTexture);
+        SAMPLER(sampler_LinearClamp);
+        float4 _BlitTexture_TexelSize;
+        float4 _BlitScaleBias;  // xy scale, zw bias
+        float _Offset;
+
+        struct Attributes { float4 positionOS:POSITION; float2 uv:TEXCOORD0; };
+        struct Varyings   { float4 positionHCS:SV_POSITION; float2 uv:TEXCOORD0; };
+
+        Varyings vert(Attributes v)
+        {
+            Varyings o;
+            o.positionHCS = TransformObjectToHClip(v.positionOS.xyz);
+            o.uv = v.uv;
+            return o;
+        }
+
+        float2 BlitUV(float2 uv) { return uv * _BlitScaleBias.xy + _BlitScaleBias.zw; }
+
+        half4 DownsampleFrag(Varyings i) : SV_Target
+        {
+            float2 uv = BlitUV(i.uv);
+            float2 d = _BlitTexture_TexelSize.xy * _Offset;
+
+            half4 c = 0;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv) * 0.5;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2( d.x,  d.y)) * 0.125;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2(-d.x,  d.y)) * 0.125;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2( d.x, -d.y)) * 0.125;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2(-d.x, -d.y)) * 0.125;
+            return c;
+        }
+
+        half4 UpsampleFrag(Varyings i) : SV_Target
+        {
+            float2 uv = BlitUV(i.uv);
+            float2 d = _BlitTexture_TexelSize.xy * _Offset;
+
+            half4 c = 0;
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2( d.x,  d.y));
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2(-d.x,  d.y));
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2( d.x, -d.y));
+            c += SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_LinearClamp, uv + float2(-d.x, -d.y));
+            return c * 0.25;
+        }
+        ENDHLSL
+
+        Pass
+        {
+            Name "Downsample"
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment DownsampleFrag
+            ENDHLSLPROGRAM
+        }
+
+        Pass
+        {
+            Name "Upsample"
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment UpsampleFrag
+            ENDHLSLPROGRAM
+        }
+    }
+}

Assets/ResRaw/Shader/DualKawaseBlur.shader.meta

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+fileFormatVersion: 2
+guid: 049554a5919b4543b166b26c451603ec
+timeCreated: 1770108188