Added support for auto-reactive mask generation, using a temp RT for storing the opaque-only image.

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/SuperResolution.cs

@@ -22,8 +22,7 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using UnityEngine.Rendering;
-using UnityEngine.Rendering.PostProcessing;
+using UnityEngine.Experimental.Rendering;
 using FidelityFX;
 
 namespace UnityEngine.Rendering.PostProcessing
@@ -64,9 +63,13 @@ namespace UnityEngine.Rendering.PostProcessing
         [Serializable]
         public class GenerateReactiveParameters
         {
+            [Tooltip("A value to scale the output")]
             [Range(0, 2)] public float scale = 0.5f;
+            [Tooltip("A threshold value to generate a binary reactive mask")]
             [Range(0, 1)] public float cutoffThreshold = 0.2f;
+            [Tooltip("A value to set for the binary reactive mask")]
             [Range(0, 1)] public float binaryValue = 0.9f;
+            [Tooltip("Flags to determine how to generate the reactive mask")]
             public Fsr2.GenerateReactiveFlags flags = Fsr2.GenerateReactiveFlags.ApplyTonemap | Fsr2.GenerateReactiveFlags.ApplyThreshold | Fsr2.GenerateReactiveFlags.UseComponentsMax;
         }
 
@@ -133,7 +136,7 @@ namespace UnityEngine.Rendering.PostProcessing
             context.camera.rect = _originalRect;
         }
 
-        public void Render(PostProcessRenderContext context)
+        public void Render(PostProcessRenderContext context, RenderTargetIdentifier opaqueOnly)
         {
             var cmd = context.command;
             cmd.BeginSample("FSR2");
@@ -156,7 +159,11 @@ namespace UnityEngine.Rendering.PostProcessing
 
             if (autoGenerateReactiveMask)
             {
-                // TODO: auto-generate reactive mask
+                SetupAutoReactiveDescription(context, opaqueOnly);
+                
+                cmd.GetTemporaryRT(Fsr2ShaderIDs.UavAutoReactive, _renderSize.x, _renderSize.y, 0, default, GraphicsFormat.R8_UNorm, 1, true);
+                _fsrContext.GenerateReactiveMask(_genReactiveDescription, cmd);
+                _dispatchDescription.Reactive = Fsr2ShaderIDs.UavAutoReactive;
             }
             
             cmd.GetTemporaryRT(Fsr2ShaderIDs.UavUpscaledOutput, _displaySize.x, _displaySize.y, 0, default, context.sourceFormat, default, 1, true);
@@ -264,6 +271,18 @@ namespace UnityEngine.Rendering.PostProcessing
             }
         }
 
+        private void SetupAutoReactiveDescription(PostProcessRenderContext context, RenderTargetIdentifier opaqueOnly)
+        {
+            _genReactiveDescription.ColorOpaqueOnly = opaqueOnly;
+            _genReactiveDescription.ColorPreUpscale = null;
+            _genReactiveDescription.OutReactive = null;
+            _genReactiveDescription.RenderSize = _renderSize;
+            _genReactiveDescription.Scale = generateReactiveParameters.scale;
+            _genReactiveDescription.CutoffThreshold = generateReactiveParameters.cutoffThreshold;
+            _genReactiveDescription.BinaryValue = generateReactiveParameters.binaryValue;
+            _genReactiveDescription.Flags = generateReactiveParameters.flags;
+        }
+
         private class Callbacks : Fsr2CallbacksBase
         {
             private readonly PostProcessResources _resources;

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/PostProcessLayer.cs

@@ -214,6 +214,7 @@ namespace UnityEngine.Rendering.PostProcessing
         PostProcessRenderContext m_CurrentContext;
         LogHistogram m_LogHistogram;
 
+        RenderTexture m_opaqueOnly;
         RenderTexture m_upscaledOutput;
 
         bool m_SettingsUpdateNeeded = true;
@@ -283,6 +284,12 @@ namespace UnityEngine.Rendering.PostProcessing
         [ImageEffectUsesCommandBuffer]
         void OnRenderImage(RenderTexture src, RenderTexture dst)
         {
+            if (m_opaqueOnly != null)
+            {
+                m_opaqueOnly.Release();
+                m_opaqueOnly = null;
+            }
+            
             if (!finalBlitToCameraTarget && m_CurrentContext.IsSuperResolutionActive())
             {
                 // Blit the upscaled image to the backbuffer
@@ -634,10 +641,12 @@ namespace UnityEngine.Rendering.PostProcessing
                 aoRenderer.Get().RenderAfterOpaque(context);
             }
 
+            bool fsrRequiresOpaque = context.IsSuperResolutionActive() && superResolution.autoGenerateReactiveMask; // TODO or auto-TCR
+
             bool isFogActive = fog.IsEnabledAndSupported(context);
             bool hasCustomOpaqueOnlyEffects = HasOpaqueOnlyEffects(context);
             int opaqueOnlyEffects = 0;
-            // TODO: if FSR2 is active & using auto-reactive/TCR, add opaque-only copy step
+            opaqueOnlyEffects += fsrRequiresOpaque ? 1 : 0;
             opaqueOnlyEffects += isScreenSpaceReflectionsActive ? 1 : 0;
             opaqueOnlyEffects += isFogActive ? 1 : 0;
             opaqueOnlyEffects += hasCustomOpaqueOnlyEffects ? 1 : 0;
@@ -662,7 +671,12 @@ namespace UnityEngine.Rendering.PostProcessing
                     UpdateSrcDstForOpaqueOnly(ref srcTarget, ref dstTarget, context, cameraTarget, opaqueOnlyEffects);
                 }
                 
-                // TODO: create opaque-only texture copy for FSR2 auto-reactive/TCR
+                if (fsrRequiresOpaque)
+                {
+                    m_opaqueOnly = context.GetScreenSpaceTemporaryRT();
+                    cmd.BuiltinBlit(context.source, m_opaqueOnly);
+                    opaqueOnlyEffects--;
+                }
 
                 if (isScreenSpaceReflectionsActive)
                 {
@@ -1141,7 +1155,7 @@ namespace UnityEngine.Rendering.PostProcessing
                     var finalDestination = context.destination;
                     context.GetScreenSpaceTemporaryRT(cmd, fsrTarget, 0, context.sourceFormat);
                     context.destination = fsrTarget;
-                    superResolution.Render(context);
+                    superResolution.Render(context, m_opaqueOnly);
                     context.source = fsrTarget;
                     context.destination = finalDestination;