Shader "Hidden/VolumetricFog2/Blur"
{
Properties
{
        [HideInInspector] _BlendSrc("Blend Src", Int) = 1
        [HideInInspector] _BlendDest("Blend Dest", Int) = 1
}
SubShader
{
    ZWrite Off ZTest Always Blend Off Cull Off

    HLSLINCLUDE
    #pragma target 3.0
    #pragma prefer_hlslcc gles
    #pragma exclude_renderers d3d11_9x
    
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Filtering.hlsl"
    #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
    #include "Packages/com.unity.render-pipelines.universal/Shaders/PostProcessing/Common.hlsl"
    ENDHLSL

  Pass { // 0 Blur horizontally
      HLSLPROGRAM
      #pragma vertex VertBlur
      #pragma fragment FragBlur
      #define EDGE_PRESERVE 0
      #define BLUR_HORIZ
      #include "Blur.hlsl"
      ENDHLSL
  }    
      
  Pass { // 1 Blur vertically
	  HLSLPROGRAM
      #pragma vertex VertBlur
      #pragma fragment FragBlur
      #define EDGE_PRESERVE 0
      #define BLUR_VERT
      #include "Blur.hlsl"
      ENDHLSL
  }
      
  Pass { // 2 Blend
      Blend One OneMinusSrcAlpha
	  HLSLPROGRAM
      #pragma vertex VertBlur
      #pragma fragment FragBlur
      #pragma multi_compile_local _ EDGE_PRESERVE
      #define BLUR_VERT
      #define FINAL_BLEND
      //#define DITHER // commented for future uses
      #include "Blur.hlsl"
      ENDHLSL
  }    
      
  Pass { // 3 Separated Blend
      Blend One OneMinusSrcAlpha
	  HLSLPROGRAM
      #pragma vertex VertSimple
      #pragma fragment FragSeparatedBlend
      #include "Blur.hlsl"
      ENDHLSL
  }
      
  Pass { // 4 Downscale depth
	  HLSLPROGRAM
      #pragma vertex VertSimple
      #pragma fragment FragOnlyDepth
      #include "Blur.hlsl"
      ENDHLSL
  }

  Pass { // 5 Blur vertically final (used with downscaling)
	  HLSLPROGRAM
      #pragma vertex VertBlur
      #pragma fragment FragBlur
      #pragma multi_compile_local _ EDGE_PRESERVE
      #define BLUR_VERT
      #define FINAL_BLEND
      #include "Blur.hlsl"
      ENDHLSL
  }
    
}
}