Shader "Hidden/HDRP/LensFlareScreenSpace"
{
    SubShader
    {
        Tags{ "RenderPipeline" = "HDRenderPipeline" }
        
        Pass
        {
            Name "LensFlareScreenSpac Prefilter"
            Tags{ "LightMode" = "Forward"  "RenderQueue" = "Transparent" }

            ZWrite Off
            Cull Off
            ZTest Always

            HLSLPROGRAM
                #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch

                #pragma target 5.0
                #pragma vertex vert
                #pragma fragment FragmentPrefilter

                #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
                #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"

                #define HDRP_LENS_FLARE_SCREEN_SPACE

                #include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/LensFlareScreenSpaceCommon.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "LensFlareScreenSpace Downsample"
            Tags{ "LightMode" = "Forward"  "RenderQueue" = "Transparent" }

            ZWrite Off
            Cull Off
            ZTest Always

            HLSLPROGRAM
                #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch

                #pragma target 5.0
                #pragma vertex vert
                #pragma fragment FragmentDownsample

                #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
                #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"

                #define HDRP_LENS_FLARE_SCREEN_SPACE

                #include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/LensFlareScreenSpaceCommon.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "LensFlareScreenSpace Upsample"
            Tags{ "LightMode" = "Forward"  "RenderQueue" = "Transparent" }

            ZWrite Off
            Cull Off
            ZTest Always

            HLSLPROGRAM
                #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch

                #pragma target 5.0
                #pragma vertex vert
                #pragma fragment FragmentUpsample

                #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
                #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"

                #define HDRP_LENS_FLARE_SCREEN_SPACE

                #include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/LensFlareScreenSpaceCommon.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "LensFlareScreenSpace Composition"
            Tags{ "LightMode" = "Forward"  "RenderQueue" = "Transparent" }

            ZWrite Off
            Cull Off
            ZTest Always

            HLSLPROGRAM
                #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch

                #pragma target 5.0
                #pragma vertex vert
                #pragma fragment FragmentComposition

                #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
                #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"

                #define HDRP_LENS_FLARE_SCREEN_SPACE

                #include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/LensFlareScreenSpaceCommon.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "LensFlareScreenSpace Write to BloomTexture"
            Tags{ "LightMode" = "Forward"  "RenderQueue" = "Transparent" }

            Blend One One
            BlendOp Add
            ZWrite Off
            Cull Off
            ZTest Always

            HLSLPROGRAM
                #pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch

                #pragma target 5.0
                #pragma vertex vert
                #pragma fragment FragmentWrite

                #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
                #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"

                #define HDRP_LENS_FLARE_SCREEN_SPACE

                #include "Packages/com.unity.render-pipelines.core/Runtime/PostProcessing/Shaders/LensFlareScreenSpaceCommon.hlsl"
            ENDHLSL
        }
    }
}