Add custom post process before TAA injection point

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/4x_PostProcessing/4060_CustomPostProcess.unity

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@@ -573,6 +683,7 @@ MeshRenderer:
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TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/4x_PostProcessing/4060_CustomPostProcess/DepthTAA.cs

@@ -0,0 +1,44 @@
+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Experimental.Rendering;
+using UnityEngine.Rendering.HighDefinition;
+using System;
+
+[Serializable, VolumeComponentMenu("Post-processing/Custom/DepthTAA")]
+public sealed class DepthTAA : CustomPostProcessVolumeComponent, IPostProcessComponent
+{
+    [Tooltip("Controls the intensity of the effect.")]
+    public ClampedFloatParameter intensity = new ClampedFloatParameter(0f, 0f, 1f);
+
+    Material m_Material;
+
+    public bool IsActive() => m_Material != null && intensity.value > 0f;
+
+    // Do not forget to add this post process in the Custom Post Process Orders list (Project Settings > HDRP Default Settings).
+    public override CustomPostProcessInjectionPoint injectionPoint => CustomPostProcessInjectionPoint.BeforeTAA;
+
+    const string kShaderName = "Hidden/Shader/DepthTAA";
+
+    public override void Setup()
+    {
+        if (Shader.Find(kShaderName) != null)
+            m_Material = new Material(Shader.Find(kShaderName));
+        else
+            Debug.LogError($"Unable to find shader '{kShaderName}'. Post Process Volume DepthTAA is unable to load.");
+    }
+
+    public override void Render(CommandBuffer cmd, HDCamera camera, RTHandle source, RTHandle destination)
+    {
+        if (m_Material == null)
+            return;
+
+        m_Material.SetFloat("_Intensity", intensity.value);
+        m_Material.SetTexture("_InputTexture", source);
+        HDUtils.DrawFullScreen(cmd, m_Material, destination);
+    }
+
+    public override void Cleanup()
+    {
+        CoreUtils.Destroy(m_Material);
+    }
+}

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/4x_PostProcessing/4060_CustomPostProcess/DepthTAA.shader

@@ -0,0 +1,77 @@
+Shader "Hidden/Shader/DepthTAA"
+{
+    HLSLINCLUDE
+
+    #pragma target 4.5
+    #pragma only_renderers d3d11 playstation xboxone vulkan metal switch
+
+    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
+    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
+    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
+    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/FXAA.hlsl"
+    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/PostProcessing/Shaders/RTUpscale.hlsl"
+
+    struct Attributes
+    {
+        uint vertexID : SV_VertexID;
+        UNITY_VERTEX_INPUT_INSTANCE_ID
+    };
+
+    struct Varyings
+    {
+        float4 positionCS : SV_POSITION;
+        float2 texcoord   : TEXCOORD0;
+        UNITY_VERTEX_OUTPUT_STEREO
+    };
+
+    Varyings Vert(Attributes input)
+    {
+        Varyings output;
+        UNITY_SETUP_INSTANCE_ID(input);
+        UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
+        output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID);
+        output.texcoord = GetFullScreenTriangleTexCoord(input.vertexID);
+        return output;
+    }
+
+    // List of properties to control your post process effect
+    float _Intensity;
+    TEXTURE2D_X(_InputTexture);
+
+    float4 CustomPostProcess(Varyings input) : SV_Target
+    {
+        UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
+        float depth = LoadCameraDepth(input.positionCS);
+
+        uint2 positionSS = input.texcoord * _ScreenSize.xy;
+        float3 outColor = LOAD_TEXTURE2D_X(_InputTexture, positionSS).xyz;
+
+        float l = LinearEyeDepth(depth, _ZBufferParams);
+
+        if (input.positionCS.x > 300)
+            return float4(l < 0.2 ? 1 : 0, 0, 0, 1);
+        else
+            return float4(outColor, 1);
+    }
+
+    ENDHLSL
+
+    SubShader
+    {
+        Pass
+        {
+            Name "DepthTAA"
+
+            ZWrite Off
+            ZTest Always
+            Blend Off
+            Cull Off
+
+            HLSLPROGRAM
+                #pragma fragment CustomPostProcess
+                #pragma vertex Vert
+            ENDHLSL
+        }
+    }
+    Fallback Off
+}

TestProjects/HDRP_Tests/Assets/GraphicTests/Scenes/4x_PostProcessing/4060_CustomPostProcess/Post Processing Profile.asset

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+  m_Script: {fileID: 11500000, guid: 2dca036544424d246aa08ce4963ad377, type: 3}
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