Implemented depth clip pass. Solved the problem of UAV/SRV name mismatch by monkey-patching the relevant shaders. Added default reactive mask.

Assets/Resources/FSR2/ffx_fsr2_depth_clip_pass.compute

@@ -11,4 +11,8 @@
 #define FFX_GPU         // Compiling for GPU
 #define FFX_HLSL        // Compile for plain HLSL
 
+// Monkey patch SRV names to match the UAV names from the shaders that output them
+#define r_reconstructed_previous_nearest_depth      rw_reconstructed_previous_nearest_depth
+#define r_dilatedDepth                              rw_dilatedDepth
+
 #include "shaders/ffx_fsr2_depth_clip_pass.hlsl"

Assets/Scripts/Fsr2Context.cs

@@ -121,6 +121,7 @@ namespace FidelityFX
         {
             _computeLuminancePyramidPipeline = new Fsr2ComputeLuminancePyramidPipeline(_contextDescription, _fsr2ConstantsBuffer, _spdConstantsBuffer, _autoExposureResource);
             _reconstructPreviousDepthPipeline = new Fsr2ReconstructPreviousDepthPipeline(_contextDescription, _fsr2ConstantsBuffer, _dilatedMotionVectorResources);
+            _depthClipPipeline = new Fsr2DepthClipPipeline(_contextDescription, _fsr2ConstantsBuffer, _dilatedMotionVectorResources);
             _accumulatePipeline = new Fsr2AccumulatePipeline(_contextDescription, _fsr2ConstantsBuffer);
             _accumulateSharpenPipeline = new Fsr2AccumulateSharpenPipeline(_contextDescription, _fsr2ConstantsBuffer);
             _rcasPipeline = new Fsr2RcasPipeline(_contextDescription, _fsr2ConstantsBuffer, _rcasConstantsBuffer);
@@ -205,7 +206,7 @@ namespace FidelityFX
             _reconstructPreviousDepthPipeline.ScheduleDispatch(_commandBuffer, dispatchParams, frameIndex, dispatchSrcX, dispatchSrcY);
 
             // Depth clip
-            // _commandBuffer.DispatchCompute(_depthClipShader, _depthClipKernel, dispatchSrcX, dispatchSrcY, 1);
+            _depthClipPipeline.ScheduleDispatch(_commandBuffer, dispatchParams, frameIndex, dispatchSrcX, dispatchSrcY);
 
             // Create locks
             // _commandBuffer.DispatchCompute(_lockShader, _lockKernel, dispatchSrcX, dispatchSrcY, 1);

Assets/Scripts/Fsr2Controller.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq;
 using FidelityFX;
 using UnityEngine;
+using UnityEngine.Experimental.Rendering;
 using UnityEngine.Rendering;
 
 /// <summary>
@@ -38,7 +39,7 @@ public class Fsr2Controller : MonoBehaviour
 
     private RenderTexture _colorRT, _depthRT, _motionVectorsRT;
     private RenderTexture _outputRT;
-    private Texture2D _exposure;
+    private Texture2D _defaultExposure, _defaultReactive;
 
     private Material _copyDepthMat;
     private Material CopyDepthMaterial
@@ -92,17 +93,22 @@ public class Fsr2Controller : MonoBehaviour
         _outputRT = new RenderTexture(DisplaySize.x, DisplaySize.y, 24, RenderTextureFormat.ARGBHalf) { enableRandomWrite = true };
         _outputRT.Create();
 
-        _exposure = new Texture2D(1, 1) { name = "FSR2 Exposure" };
-        _exposure.SetPixel(0, 0, Color.white);
-        _exposure.Apply();
+        // TODO: move these defaults to Fsr2Context, provide nulls in dispatch
+        _defaultExposure = new Texture2D(1, 1, GraphicsFormat.R32G32_SFloat, TextureCreationFlags.None) { name = "FSR2 Default Exposure" };
+        _defaultExposure.SetPixel(0, 0, Color.black);
+        _defaultExposure.Apply();
+
+        _defaultReactive = new Texture2D(1, 1, GraphicsFormat.R8_UNorm, TextureCreationFlags.None) { name = "FSR2 Default Reactive Mask" };
+        _defaultReactive.SetPixel(0, 0, Color.black);
+        _defaultReactive.Apply();
     }
 
     private void OnDisable()
     {
-        if (_exposure != null)
+        if (_defaultExposure != null)
         {
-            Destroy(_exposure);
-            _exposure = null;
+            Destroy(_defaultExposure);
+            _defaultExposure = null;
         }
 
         if (_outputRT != null)
@@ -150,7 +156,8 @@ public class Fsr2Controller : MonoBehaviour
         _dispatchDescription.Depth = _depthRT;
         _dispatchDescription.MotionVectors = _motionVectorsRT;
         _dispatchDescription.Output = _outputRT;
-        _dispatchDescription.Exposure = _exposure;
+        _dispatchDescription.Exposure = _defaultExposure;
+        _dispatchDescription.Reactive = _defaultReactive;
         _dispatchDescription.PreExposure = 1.0f;
         _dispatchDescription.EnableSharpening = performSharpenPass;
         _dispatchDescription.Sharpness = sharpness;

Assets/Scripts/Fsr2Pipeline.cs

@@ -22,6 +22,11 @@ namespace FidelityFX
         protected static readonly int SrvInputMotionVectors = Shader.PropertyToID("r_input_motion_vectors");
         protected static readonly int SrvInputDepth = Shader.PropertyToID("r_input_depth");
         protected static readonly int SrvInputExposure = Shader.PropertyToID("r_input_exposure");
+        protected static readonly int SrvDilatedMotionVectors = Shader.PropertyToID("r_dilated_motion_vectors");
+        protected static readonly int SrvDilatedDepth = Shader.PropertyToID("r_dilatedDepth");
+        protected static readonly int SrvReactiveMask = Shader.PropertyToID("r_reactive_mask");
+        protected static readonly int SrvTransparencyAndCompositionMask = Shader.PropertyToID("r_transparency_and_composition_mask");
+        protected static readonly int SrvPrevDilatedMotionVectors = Shader.PropertyToID("r_previous_dilated_motion_vectors");
         protected static readonly int SrvRcasInput = Shader.PropertyToID("r_rcas_input");
 
         // Unordered access views, i.e. random read/write bindings
@@ -34,6 +39,8 @@ namespace FidelityFX
         protected static readonly int UavDilatedMotionVectors = Shader.PropertyToID("rw_dilated_motion_vectors");
         protected static readonly int UavDilatedDepth = Shader.PropertyToID("rw_dilatedDepth");
         protected static readonly int UavLockInputLuma = Shader.PropertyToID("rw_lock_input_luma");
+        protected static readonly int UavDilatedReactiveMasks = Shader.PropertyToID("rw_dilated_reactive_masks");
+        protected static readonly int UavPreparedInputColor = Shader.PropertyToID("rw_prepared_input_color");
 
         // Constant buffer bindings
         protected static readonly int CbFsr2 = Shader.PropertyToID("cbFSR2");
@@ -77,7 +84,14 @@ namespace FidelityFX
             commandBuffer.GetTemporaryRT(UavDilatedDepth, maxRenderSize.x, maxRenderSize.y, 0, FilterMode.Point, GraphicsFormat.R32_SFloat, 1, true);
 
             // FSR2_LockInputLuma: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R16_FLOAT, FFX_RESOURCE_FLAGS_ALIASABLE
+            // TODO: should be at render resolution according to the docs (at least when output from Reconstruct & Dilate)
             commandBuffer.GetTemporaryRT(UavLockInputLuma, displaySize.x, displaySize.y, 0, FilterMode.Point, GraphicsFormat.R16_SFloat, 1, true);
+            
+            // FSR2_DilatedReactiveMasks: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R8G8_UNORM, FFX_RESOURCE_FLAGS_ALIASABLE
+            commandBuffer.GetTemporaryRT(UavDilatedReactiveMasks, maxRenderSize.x, maxRenderSize.y, 0, FilterMode.Point, GraphicsFormat.R8G8_UNorm, 1, true);
+            
+            // FSR2_PreparedInputColor: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R16G16B16A16_FLOAT, FFX_RESOURCE_FLAGS_ALIASABLE
+            commandBuffer.GetTemporaryRT(UavPreparedInputColor, maxRenderSize.x, maxRenderSize.y, 0, FilterMode.Point, GraphicsFormat.R16G16B16A16_SFloat, 1, true);
         }
 
         public static void UnregisterResources(CommandBuffer commandBuffer)
@@ -187,6 +201,35 @@ namespace FidelityFX
         }
     }
     
+    internal class Fsr2DepthClipPipeline : Fsr2Pipeline
+    {
+        private readonly RenderTexture[] _dilatedMotionVectors;
+        
+        public Fsr2DepthClipPipeline(Fsr2.ContextDescription contextDescription, ComputeBuffer constants, RenderTexture[] dilatedMotionVectors)
+            : base(contextDescription, constants)
+        {
+            _dilatedMotionVectors = dilatedMotionVectors;
+            
+            LoadComputeShader("FSR2/ffx_fsr2_depth_clip_pass");
+        }
+
+        public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
+        {
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvDilatedMotionVectors, _dilatedMotionVectors[frameIndex]);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvReactiveMask, dispatchParams.Reactive);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvTransparencyAndCompositionMask, dispatchParams.Reactive);   // Default reactive mask, as we don't support TCR (yet)
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvPrevDilatedMotionVectors, _dilatedMotionVectors[frameIndex ^ 1]);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvInputMotionVectors, dispatchParams.MotionVectors);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvInputColor, dispatchParams.Color);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvInputDepth, dispatchParams.Depth);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, SrvInputExposure, dispatchParams.Exposure);
+
+            commandBuffer.SetComputeConstantBufferParam(ComputeShader, CbFsr2, Constants, 0, Marshal.SizeOf<Fsr2.Fsr2Constants>());
+            
+            commandBuffer.DispatchCompute(ComputeShader, KernelIndex, dispatchX, dispatchY, 1);
+        }
+    }
+
     internal class Fsr2AccumulatePipeline : Fsr2Pipeline
     {
         public Fsr2AccumulatePipeline(Fsr2.ContextDescription contextDescription, ComputeBuffer constants)