Added support for the experimental automatic Transparency, Compostion & Reactive masks generation pass.

Assets/Resources/FSR2/ffx_fsr2_tcr_autogen_pass.compute

@@ -0,0 +1,33 @@
+// Copyright (c) 2023 Nico de Poel
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#pragma kernel CS
+
+#pragma multi_compile_local __ FFX_HALF
+#pragma multi_compile_local __ FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE
+#pragma multi_compile_local __ FFX_FSR2_OPTION_HDR_COLOR_INPUT
+#pragma multi_compile_local __ FFX_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+#pragma multi_compile_local __ FFX_FSR2_OPTION_JITTERED_MOTION_VECTORS
+#pragma multi_compile_local __ FFX_FSR2_OPTION_INVERTED_DEPTH
+#pragma multi_compile_local __ FFX_FSR2_OPTION_APPLY_SHARPENING
+
+#include "ffx_fsr2_unity_common.cginc"
+
+#include "shaders/ffx_fsr2_tcr_autogen_pass.hlsl"

Assets/Resources/FSR2/ffx_fsr2_tcr_autogen_pass.compute.meta

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+  assetBundleName: 
+  assetBundleVariant: 

Assets/Resources/FSR2/shaders/ffx_fsr2_tcr_autogen.h

@@ -0,0 +1,250 @@
+// This file is part of the FidelityFX SDK.
+//
+// Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#define USE_YCOCG 1
+
+#define fAutogenEpsilon 0.01f
+
+// EXPERIMENTAL
+
+FFX_MIN16_F ComputeAutoTC_01(FFX_MIN16_I2 uDispatchThreadId, FFX_MIN16_I2 iPrevIdx)
+{
+    FfxFloat32x3 colorPreAlpha = LoadOpaqueOnly(uDispatchThreadId);
+    FfxFloat32x3 colorPostAlpha = LoadInputColor(uDispatchThreadId);
+    FfxFloat32x3 colorPrevPreAlpha = LoadPrevPreAlpha(iPrevIdx);
+    FfxFloat32x3 colorPrevPostAlpha = LoadPrevPostAlpha(iPrevIdx);
+
+#if USE_YCOCG    
+    colorPreAlpha = RGBToYCoCg(colorPreAlpha);
+    colorPostAlpha = RGBToYCoCg(colorPostAlpha);
+    colorPrevPreAlpha = RGBToYCoCg(colorPrevPreAlpha);
+    colorPrevPostAlpha = RGBToYCoCg(colorPrevPostAlpha);
+#endif
+
+    FfxFloat32x3 colorDeltaCurr = colorPostAlpha - colorPreAlpha;
+    FfxFloat32x3 colorDeltaPrev = colorPrevPostAlpha - colorPrevPreAlpha;
+    bool hasAlpha = any(FFX_GREATER_THAN(abs(colorDeltaCurr), FfxFloat32x3(fAutogenEpsilon, fAutogenEpsilon, fAutogenEpsilon)));
+    bool hadAlpha = any(FFX_GREATER_THAN(abs(colorDeltaPrev), FfxFloat32x3(fAutogenEpsilon, fAutogenEpsilon, fAutogenEpsilon)));
+
+    FfxFloat32x3 X = colorPreAlpha;
+    FfxFloat32x3 Y = colorPostAlpha;
+    FfxFloat32x3 Z = colorPrevPreAlpha;
+    FfxFloat32x3 W = colorPrevPostAlpha;
+
+    FFX_MIN16_F retVal = FFX_MIN16_F(ffxSaturate(dot(abs(abs(Y - X) - abs(W - Z)), FfxFloat32x3(1, 1, 1))));
+
+    // cleanup very small values
+    retVal = (retVal < getTcThreshold()) ? FFX_MIN16_F(0.0f) : FFX_MIN16_F(1.f);
+
+    return retVal;
+}
+
+// works ok: thin edges
+FFX_MIN16_F ComputeAutoTC_02(FFX_MIN16_I2 uDispatchThreadId, FFX_MIN16_I2 iPrevIdx)
+{
+    FfxFloat32x3 colorPreAlpha = LoadOpaqueOnly(uDispatchThreadId);
+    FfxFloat32x3 colorPostAlpha = LoadInputColor(uDispatchThreadId);
+    FfxFloat32x3 colorPrevPreAlpha = LoadPrevPreAlpha(iPrevIdx);
+    FfxFloat32x3 colorPrevPostAlpha = LoadPrevPostAlpha(iPrevIdx);
+
+#if USE_YCOCG    
+    colorPreAlpha = RGBToYCoCg(colorPreAlpha);
+    colorPostAlpha = RGBToYCoCg(colorPostAlpha);
+    colorPrevPreAlpha = RGBToYCoCg(colorPrevPreAlpha);
+    colorPrevPostAlpha = RGBToYCoCg(colorPrevPostAlpha);
+#endif
+
+    FfxFloat32x3 colorDelta = colorPostAlpha - colorPreAlpha;
+    FfxFloat32x3 colorPrevDelta = colorPrevPostAlpha - colorPrevPreAlpha;
+    bool hasAlpha = any(FFX_GREATER_THAN(abs(colorDelta), FfxFloat32x3(fAutogenEpsilon, fAutogenEpsilon, fAutogenEpsilon)));
+    bool hadAlpha = any(FFX_GREATER_THAN(abs(colorPrevDelta), FfxFloat32x3(fAutogenEpsilon, fAutogenEpsilon, fAutogenEpsilon)));
+
+    FfxFloat32x3 delta = colorPostAlpha - colorPreAlpha;              //prev+1*d = post   => d = color, alpha =
+    FfxFloat32x3 deltaPrev = colorPrevPostAlpha - colorPrevPreAlpha;
+
+    FfxFloat32x3 X = colorPrevPreAlpha;
+    FfxFloat32x3 N = colorPreAlpha - colorPrevPreAlpha;
+    FfxFloat32x3 YAminusXA = colorPrevPostAlpha - colorPrevPreAlpha;
+    FfxFloat32x3 NminusNA = colorPostAlpha - colorPrevPostAlpha;
+
+    FfxFloat32x3 A = (hasAlpha || hadAlpha) ? NminusNA / max(FfxFloat32x3(fAutogenEpsilon, fAutogenEpsilon, fAutogenEpsilon), N) : FfxFloat32x3(0, 0, 0);
+
+    FFX_MIN16_F retVal = FFX_MIN16_F( max(max(A.x, A.y), A.z) );
+
+    // only pixels that have significantly changed in color shuold be considered
+    retVal = ffxSaturate(retVal * FFX_MIN16_F(length(colorPostAlpha - colorPrevPostAlpha)) );
+
+    return retVal;
+}
+
+// This function computes the TransparencyAndComposition mask:
+// This mask indicates pixels that should discard locks and apply color clamping.
+// 
+// Typically this is the case for translucent pixels (that don't write depth values) or pixels where the correctness of 
+// the MVs can not be guaranteed (e.g. procedutal movement or vegetation that does not have MVs to reduce the cost during rasterization)
+// Also, large changes in color due to changed lighting should be marked to remove locks on pixels with "old" lighting.
+//
+// This function takes a opaque only and a final texture and uses internal copies of those textures from the last frame.
+// The function tries to determine where the color changes between opaque only and final image to determine the pixels that use transparency.
+// Also it uses the previous frames and detects where the use of transparency changed to mark those pixels.
+// Additionally it marks pixels where the color changed significantly in the opaque only image, e.g. due to lighting or texture animation.
+// 
+// In the final step it stores the current textures in internal textures for the next frame
+
+FFX_MIN16_F ComputeTransparencyAndComposition(FFX_MIN16_I2 uDispatchThreadId, FFX_MIN16_I2 iPrevIdx)
+{
+    FFX_MIN16_F retVal = ComputeAutoTC_02(uDispatchThreadId, iPrevIdx);
+
+    // [branch]
+    if (retVal > FFX_MIN16_F(0.01f))
+    {
+        retVal = ComputeAutoTC_01(uDispatchThreadId, iPrevIdx);
+    }
+    return retVal;
+}
+
+float computeSolidEdge(FFX_MIN16_I2 curPos, FFX_MIN16_I2 prevPos)
+{
+    float lum[9];
+    int i = 0;
+    for (int y = -1; y < 2; ++y)
+    {
+        for (int x = -1; x < 2; ++x)
+        {
+            FfxFloat32x3 curCol  = LoadOpaqueOnly(curPos + FFX_MIN16_I2(x, y)).rgb;
+            FfxFloat32x3 prevCol = LoadPrevPreAlpha(prevPos + FFX_MIN16_I2(x, y)).rgb;
+            lum[i++] = length(curCol - prevCol);
+        }
+    }
+
+    //float gradX = abs(lum[3] - lum[4]) + abs(lum[5] - lum[4]);
+    //float gradY = abs(lum[1] - lum[4]) + abs(lum[7] - lum[4]);
+
+    //return sqrt(gradX * gradX + gradY * gradY);
+
+    float gradX = abs(lum[3] - lum[4]) * abs(lum[5] - lum[4]);
+    float gradY = abs(lum[1] - lum[4]) * abs(lum[7] - lum[4]);
+
+    return sqrt(sqrt(gradX * gradY));
+}
+
+float computeAlphaEdge(FFX_MIN16_I2 curPos, FFX_MIN16_I2 prevPos)
+{
+    float lum[9];
+    int i = 0;
+    for (int y = -1; y < 2; ++y)
+    {
+        for (int x = -1; x < 2; ++x)
+        {
+            FfxFloat32x3 curCol  = abs(LoadInputColor(curPos + FFX_MIN16_I2(x, y)).rgb - LoadOpaqueOnly(curPos + FFX_MIN16_I2(x, y)).rgb);
+            FfxFloat32x3 prevCol = abs(LoadPrevPostAlpha(prevPos + FFX_MIN16_I2(x, y)).rgb - LoadPrevPreAlpha(prevPos + FFX_MIN16_I2(x, y)).rgb);
+            lum[i++] = length(curCol - prevCol);
+        }
+    }
+
+    //float gradX = abs(lum[3] - lum[4]) + abs(lum[5] - lum[4]);
+    //float gradY = abs(lum[1] - lum[4]) + abs(lum[7] - lum[4]);
+
+    //return sqrt(gradX * gradX + gradY * gradY);
+
+    float gradX = abs(lum[3] - lum[4]) * abs(lum[5] - lum[4]);
+    float gradY = abs(lum[1] - lum[4]) * abs(lum[7] - lum[4]);
+
+    return sqrt(sqrt(gradX * gradY));
+}
+
+FFX_MIN16_F ComputeAabbOverlap(FFX_MIN16_I2 uDispatchThreadId, FFX_MIN16_I2 iPrevIdx)
+{
+    FFX_MIN16_F retVal = FFX_MIN16_F(0.f);
+
+    FfxFloat32x2 fMotionVector = LoadInputMotionVector(uDispatchThreadId);
+    FfxFloat32x3 colorPreAlpha = LoadOpaqueOnly(uDispatchThreadId);
+    FfxFloat32x3 colorPostAlpha = LoadInputColor(uDispatchThreadId);
+    FfxFloat32x3 colorPrevPreAlpha = LoadPrevPreAlpha(iPrevIdx);
+    FfxFloat32x3 colorPrevPostAlpha = LoadPrevPostAlpha(iPrevIdx);
+
+#if USE_YCOCG    
+    colorPreAlpha = RGBToYCoCg(colorPreAlpha);
+    colorPostAlpha = RGBToYCoCg(colorPostAlpha);
+    colorPrevPreAlpha = RGBToYCoCg(colorPrevPreAlpha);
+    colorPrevPostAlpha = RGBToYCoCg(colorPrevPostAlpha);
+#endif
+    FfxFloat32x3 minPrev = FFX_MIN16_F3(+1000.f, +1000.f, +1000.f);
+    FfxFloat32x3 maxPrev = FFX_MIN16_F3(-1000.f, -1000.f, -1000.f);
+    for (int y = -1; y < 2; ++y)
+    {
+        for (int x = -1; x < 2; ++x)
+        {
+            FfxFloat32x3 W = LoadPrevPostAlpha(iPrevIdx + FFX_MIN16_I2(x, y));
+
+#if USE_YCOCG
+            W = RGBToYCoCg(W);
+#endif
+            minPrev = min(minPrev, W);
+            maxPrev = max(maxPrev, W);
+        }
+    }
+    // instead of computing the overlap: simply count how many samples are outside
+    // set reactive based on that
+    FFX_MIN16_F count = FFX_MIN16_F(0.f);
+    for (int y = -1; y < 2; ++y)
+    {
+        for (int x = -1; x < 2; ++x)
+        {
+            FfxFloat32x3 Y = LoadInputColor(uDispatchThreadId + FFX_MIN16_I2(x, y));
+
+#if USE_YCOCG
+            Y = RGBToYCoCg(Y);
+#endif
+            count += ((Y.x < minPrev.x) || (Y.x > maxPrev.x)) ? FFX_MIN16_F(1.f) : FFX_MIN16_F(0.f);
+            count += ((Y.y < minPrev.y) || (Y.y > maxPrev.y)) ? FFX_MIN16_F(1.f) : FFX_MIN16_F(0.f);
+            count += ((Y.z < minPrev.z) || (Y.z > maxPrev.z)) ? FFX_MIN16_F(1.f) : FFX_MIN16_F(0.f);
+        }
+    }
+    retVal = count / FFX_MIN16_F(27.f);
+
+    return retVal;
+}
+
+
+// This function computes the Reactive mask:
+// We want pixels marked where the alpha portion of the frame changes a lot between neighbours
+// Those pixels are expected to change quickly between frames, too. (e.g. small particles, reflections on curved surfaces...)
+// As a result history would not be trustworthy.
+// On the other hand we don't want pixels marked where pre-alpha has a large differnce, since those would profit from accumulation
+// For mirrors we may assume the pre-alpha is pretty uniform color.
+// 
+// This works well generally, but also marks edge pixels
+FFX_MIN16_F ComputeReactive(FFX_MIN16_I2 uDispatchThreadId, FFX_MIN16_I2 iPrevIdx)
+{
+    // we only get here if alpha has a significant contribution and has changed since last frame.
+    FFX_MIN16_F retVal = FFX_MIN16_F(0.f);
+
+    // mark pixels with huge variance in alpha as reactive
+    FFX_MIN16_F alphaEdge = FFX_MIN16_F(computeAlphaEdge(uDispatchThreadId, iPrevIdx));
+    FFX_MIN16_F opaqueEdge = FFX_MIN16_F(computeSolidEdge(uDispatchThreadId, iPrevIdx));
+    retVal = ffxSaturate(alphaEdge - opaqueEdge);
+
+    // the above also marks edge pixels due to jitter, so we need to cancel those out
+
+
+    return retVal;
+}

Assets/Resources/FSR2/shaders/ffx_fsr2_tcr_autogen.h.meta

@@ -0,0 +1,27 @@
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+  validateReferences: 1
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+      Editor: Editor
+    second:
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+      settings:
+        DefaultValueInitialized: true
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+  assetBundleName: 
+  assetBundleVariant: 

Assets/Resources/FSR2/shaders/ffx_fsr2_tcr_autogen_pass.hlsl

@@ -0,0 +1,114 @@
+// This file is part of the FidelityFX SDK.
+//
+// Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#define FSR2_BIND_SRV_INPUT_OPAQUE_ONLY                     0
+#define FSR2_BIND_SRV_INPUT_COLOR                           1
+#define FSR2_BIND_SRV_INPUT_MOTION_VECTORS                  2
+#define FSR2_BIND_SRV_PREV_PRE_ALPHA_COLOR                  3
+#define FSR2_BIND_SRV_PREV_POST_ALPHA_COLOR                 4
+#define FSR2_BIND_SRV_REACTIVE_MASK                         4
+#define FSR2_BIND_SRV_TRANSPARENCY_AND_COMPOSITION_MASK     5
+
+#define FSR2_BIND_UAV_AUTOREACTIVE                          0
+#define FSR2_BIND_UAV_AUTOCOMPOSITION                       1
+#define FSR2_BIND_UAV_PREV_PRE_ALPHA_COLOR                  2
+#define FSR2_BIND_UAV_PREV_POST_ALPHA_COLOR                 3
+
+#define FSR2_BIND_CB_FSR2                                   0
+#define FSR2_BIND_CB_AUTOREACTIVE                           1
+
+#include "ffx_fsr2_callbacks_hlsl.h"
+#include "ffx_fsr2_common.h"
+
+#if defined(FSR2_BIND_CB_AUTOREACTIVE)
+    cbuffer cbGenerateReactive : FFX_FSR2_DECLARE_CB(FSR2_BIND_CB_AUTOREACTIVE)
+    {
+        float   fTcThreshold; // 0.1 is a good starting value, lower will result in more TC pixels
+        float   fTcScale;     
+        float   fReactiveScale;
+        float   fReactiveMax;
+    };
+    float getTcThreshold()
+    {
+        return fTcThreshold;
+    }
+#else
+    #define fTcThreshold    0.05f
+    #define fTcScale        1.00f
+    #define fReactiveScale  10.0f
+    #define fReactiveMax    0.90f
+    float getTcThreshold()
+    {
+        return fTcThreshold;
+    }
+#endif
+
+#include "ffx_fsr2_tcr_autogen.h"
+
+#ifndef FFX_FSR2_THREAD_GROUP_WIDTH
+#define FFX_FSR2_THREAD_GROUP_WIDTH 8
+#endif // #ifndef FFX_FSR2_THREAD_GROUP_WIDTH
+#ifndef FFX_FSR2_THREAD_GROUP_HEIGHT
+#define FFX_FSR2_THREAD_GROUP_HEIGHT 8
+#endif // FFX_FSR2_THREAD_GROUP_HEIGHT
+#ifndef FFX_FSR2_THREAD_GROUP_DEPTH
+#define FFX_FSR2_THREAD_GROUP_DEPTH 1
+#endif // #ifndef FFX_FSR2_THREAD_GROUP_DEPTH
+#ifndef FFX_FSR2_NUM_THREADS
+#define FFX_FSR2_NUM_THREADS [numthreads(FFX_FSR2_THREAD_GROUP_WIDTH, FFX_FSR2_THREAD_GROUP_HEIGHT, FFX_FSR2_THREAD_GROUP_DEPTH)]
+#endif // #ifndef FFX_FSR2_NUM_THREADS
+
+FFX_FSR2_NUM_THREADS
+FFX_FSR2_EMBED_ROOTSIG_CONTENT
+void CS(uint2 uGroupId : SV_GroupID, uint2 uGroupThreadId : SV_GroupThreadID)
+{
+    FFX_MIN16_I2 uDispatchThreadId = FFX_MIN16_I2(uGroupId * uint2(FFX_FSR2_THREAD_GROUP_WIDTH, FFX_FSR2_THREAD_GROUP_HEIGHT) + uGroupThreadId);
+
+    // ToDo: take into account jitter (i.e. add delta of previous jitter and current jitter to previous UV
+    // fetch pre- and post-alpha color values
+    FFX_MIN16_F2 fUv = ( FFX_MIN16_F2(uDispatchThreadId) + FFX_MIN16_F2(0.5f, 0.5f) ) / FFX_MIN16_F2( RenderSize() );
+    FFX_MIN16_F2 fPrevUV = fUv + FFX_MIN16_F2( LoadInputMotionVector(uDispatchThreadId) );
+    FFX_MIN16_I2 iPrevIdx = FFX_MIN16_I2(fPrevUV * FFX_MIN16_F2(RenderSize()) - 0.5f);
+
+    FFX_MIN16_F3 colorPreAlpha  = FFX_MIN16_F3( LoadOpaqueOnly(  uDispatchThreadId ) );
+    FFX_MIN16_F3 colorPostAlpha = FFX_MIN16_F3( LoadInputColor( uDispatchThreadId ) );
+
+    FFX_MIN16_F2 outReactiveMask = 0;
+    
+    outReactiveMask.y = ComputeTransparencyAndComposition(uDispatchThreadId, iPrevIdx);
+
+    if (outReactiveMask.y > 0.5f)
+    {
+        outReactiveMask.x = ComputeReactive(uDispatchThreadId, iPrevIdx);
+        outReactiveMask.x *= FFX_MIN16_F(fReactiveScale);
+        outReactiveMask.x = outReactiveMask.x < fReactiveMax ? outReactiveMask.x : FFX_MIN16_F( fReactiveMax );
+    }
+
+    outReactiveMask.y *= FFX_MIN16_F(fTcScale  );
+
+    outReactiveMask.x = max( outReactiveMask.x, FFX_MIN16_F( LoadReactiveMask(uDispatchThreadId) ) );
+    outReactiveMask.y = max( outReactiveMask.y, FFX_MIN16_F( LoadTransparencyAndCompositionMask(uDispatchThreadId) ) );
+
+    StoreAutoReactive(uDispatchThreadId, outReactiveMask);
+
+    StorePrevPreAlpha(uDispatchThreadId, colorPreAlpha);
+    StorePrevPostAlpha(uDispatchThreadId, colorPostAlpha);
+}

Assets/Resources/FSR2/shaders/ffx_fsr2_tcr_autogen_pass.hlsl.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 9feb1fa4d6cff5a4799298dc69b12a8e
+ShaderIncludeImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scenes/SampleScene.unity

@@ -329,6 +329,12 @@ MonoBehaviour:
     cutoffThreshold: 0.2
     binaryValue: 0.9
     flags: 13
+  autoGenerateTransparencyAndComposition: 0
+  generateTransparencyAndCompositionParameters:
+    autoTcThreshold: 0.05
+    autoTcScale: 1
+    autoReactiveScale: 5
+    autoReactiveMax: 0.9
   outputMotionVectors: {fileID: 0}
 --- !u!1001 &1313173313
 PrefabInstance:

Assets/Scripts/Core/Fsr2.cs

@@ -182,6 +182,14 @@ namespace FidelityFX
             public float CameraFar;
             public float CameraFovAngleVertical;
             public float ViewSpaceToMetersFactor;
+            
+            // EXPERIMENTAL reactive mask generation parameters
+            public bool EnableAutoReactive;
+            public RenderTargetIdentifier? ColorOpaqueOnly;
+            public float AutoTcThreshold = 0.05f;
+            public float AutoTcScale = 1.0f;
+            public float AutoReactiveScale = 5.0f;
+            public float AutoReactiveMax = 0.9f;
         }
 
         /// <summary>
@@ -253,6 +261,15 @@ namespace FidelityFX
             public uint flags;
         }
 
+        [Serializable, StructLayout(LayoutKind.Sequential)]
+        internal struct GenerateReactiveConstants2
+        {
+            public float autoTcThreshold;
+            public float autoTcScale;
+            public float autoReactiveScale;
+            public float autoReactiveMax;
+        }
+        
         [Serializable, StructLayout(LayoutKind.Sequential)]
         internal struct RcasConstants
         {

Assets/Scripts/Core/Fsr2Context.cs

@@ -47,6 +47,7 @@ namespace FidelityFX
         private Fsr2Pipeline _rcasPipeline;
         private Fsr2Pipeline _computeLuminancePyramidPipeline;
         private Fsr2Pipeline _generateReactivePipeline;
+        private Fsr2Pipeline _tcrAutogeneratePipeline;
 
         private readonly Fsr2Resources _resources = new Fsr2Resources();
 
@@ -66,6 +67,10 @@ namespace FidelityFX
         private readonly Fsr2.GenerateReactiveConstants[] _generateReactiveConstantsArray = { new Fsr2.GenerateReactiveConstants() };
         private ref Fsr2.GenerateReactiveConstants GenReactiveConsts => ref _generateReactiveConstantsArray[0];
 
+        private ComputeBuffer _tcrAutogenerateConstantsBuffer;
+        private readonly Fsr2.GenerateReactiveConstants2[] _tcrAutogenerateConstantsArray = { new Fsr2.GenerateReactiveConstants2() };
+        private ref Fsr2.GenerateReactiveConstants2 TcrAutoGenConsts => ref _tcrAutogenerateConstantsArray[0];
+
         private bool _firstExecution;
         private Vector2 _previousJitterOffset;
         private int _resourceFrameIndex;
@@ -79,6 +84,7 @@ namespace FidelityFX
             _spdConstantsBuffer = CreateConstantBuffer<Fsr2.SpdConstants>();
             _rcasConstantsBuffer = CreateConstantBuffer<Fsr2.RcasConstants>();
             _generateReactiveConstantsBuffer = CreateConstantBuffer<Fsr2.GenerateReactiveConstants>();
+            _tcrAutogenerateConstantsBuffer = CreateConstantBuffer<Fsr2.GenerateReactiveConstants2>();
 
             // Set defaults
             _firstExecution = true;
@@ -100,10 +106,12 @@ namespace FidelityFX
             _accumulateSharpenPipeline = new Fsr2AccumulateSharpenPipeline(_contextDescription, _resources, _fsr2ConstantsBuffer);
             _rcasPipeline = new Fsr2RcasPipeline(_contextDescription, _resources, _fsr2ConstantsBuffer, _rcasConstantsBuffer);
             _generateReactivePipeline = new Fsr2GenerateReactivePipeline(_contextDescription, _resources, _generateReactiveConstantsBuffer);
+            _tcrAutogeneratePipeline = new Fsr2TcrAutogeneratePipeline(_contextDescription, _resources, _fsr2ConstantsBuffer, _tcrAutogenerateConstantsBuffer);
         }
         
         public void Destroy()
         {
+            DestroyPipeline(ref _tcrAutogeneratePipeline);
             DestroyPipeline(ref _generateReactivePipeline);
             DestroyPipeline(ref _computeLuminancePyramidPipeline);
             DestroyPipeline(ref _rcasPipeline);
@@ -115,6 +123,7 @@ namespace FidelityFX
             
             _resources.Destroy();
             
+            DestroyConstantBuffer(ref _tcrAutogenerateConstantsBuffer);
             DestroyConstantBuffer(ref _generateReactiveConstantsBuffer);
             DestroyConstantBuffer(ref _rcasConstantsBuffer);
             DestroyConstantBuffer(ref _spdConstantsBuffer);
@@ -156,6 +165,21 @@ namespace FidelityFX
             else if (dispatchParams.Exposure == null) 
                 dispatchParams.Exposure = _resources.DefaultExposure;
 
+            if (dispatchParams.EnableAutoReactive)
+            {
+                // Create the auto-TCR resources only when we need them
+                if (_resources.AutoReactive == null)
+                    _resources.CreateTcrAutogenResources(_contextDescription);
+                
+                if (resetAccumulation)
+                    commandBuffer.Blit(_resources.PrevPreAlpha[frameIndex ^ 1], dispatchParams.ColorOpaqueOnly ?? Fsr2ShaderIDs.SrvOpaqueOnly);
+            }
+            else if (_resources.AutoReactive != null)
+            {
+                // Destroy the auto-TCR resources if we don't use the feature 
+                _resources.DestroyTcrAutogenResources();
+            }
+            
             if (dispatchParams.Reactive == null) dispatchParams.Reactive = _resources.DefaultReactive;
             if (dispatchParams.TransparencyAndComposition == null) dispatchParams.TransparencyAndComposition = _resources.DefaultReactive;
             Fsr2Pipeline.RegisterResources(commandBuffer, _contextDescription, dispatchParams);
@@ -193,6 +217,14 @@ namespace FidelityFX
             _fsr2ConstantsBuffer.SetData(_fsr2ConstantsArray);
             _spdConstantsBuffer.SetData(_spdConstantsArray);
 
+            // Auto reactive
+            if (dispatchParams.EnableAutoReactive)
+            {
+                GenerateTransparencyCompositionReactive(dispatchParams, commandBuffer, frameIndex);
+                dispatchParams.Reactive = _resources.AutoReactive;
+                dispatchParams.TransparencyAndComposition = _resources.AutoComposition;
+            }
+            
             // Compute luminance pyramid
             _computeLuminancePyramidPipeline.ScheduleDispatch(commandBuffer, dispatchParams, frameIndex, dispatchThreadGroupCount.x, dispatchThreadGroupCount.y);
 
@@ -251,6 +283,21 @@ namespace FidelityFX
             ((Fsr2GenerateReactivePipeline)_generateReactivePipeline).ScheduleDispatch(commandBuffer, dispatchParams, dispatchSrcX, dispatchSrcY);
         }
 
+        private void GenerateTransparencyCompositionReactive(Fsr2.DispatchDescription dispatchParams, CommandBuffer commandBuffer, int frameIndex)
+        {
+            const int threadGroupWorkRegionDim = 8;
+            int dispatchSrcX = (dispatchParams.RenderSize.x + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
+            int dispatchSrcY = (dispatchParams.RenderSize.y + (threadGroupWorkRegionDim - 1)) / threadGroupWorkRegionDim;
+
+            TcrAutoGenConsts.autoTcThreshold = dispatchParams.AutoTcThreshold;
+            TcrAutoGenConsts.autoTcScale = dispatchParams.AutoTcScale;
+            TcrAutoGenConsts.autoReactiveScale = dispatchParams.AutoReactiveScale;
+            TcrAutoGenConsts.autoReactiveMax = dispatchParams.AutoReactiveMax;
+            _tcrAutogenerateConstantsBuffer.SetData(_tcrAutogenerateConstantsArray);
+            
+            _tcrAutogeneratePipeline.ScheduleDispatch(commandBuffer, dispatchParams, frameIndex, dispatchSrcX, dispatchSrcY);
+        }
+
         private void SetupConstants(Fsr2.DispatchDescription dispatchParams, bool resetAccumulation)
         {
             ref Fsr2.Fsr2Constants constants = ref Constants;

Assets/Scripts/Core/Fsr2Pipeline.cs

@@ -404,4 +404,48 @@ namespace FidelityFX
             commandBuffer.DispatchCompute(ComputeShader, KernelIndex, dispatchX, dispatchY, 1);
         }
     }
+
+    internal class Fsr2TcrAutogeneratePipeline : Fsr2Pipeline
+    {
+        private readonly ComputeBuffer _tcrAutogenerateConstants;
+
+        public Fsr2TcrAutogeneratePipeline(Fsr2.ContextDescription contextDescription, Fsr2Resources resources, ComputeBuffer constants, ComputeBuffer tcrAutogenerateConstants)
+            : base(contextDescription, resources, constants)
+        {
+            _tcrAutogenerateConstants = tcrAutogenerateConstants;
+            
+            LoadComputeShader("FSR2/ffx_fsr2_tcr_autogen_pass");
+        }
+
+        public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
+        {
+            if (dispatchParams.ColorOpaqueOnly.HasValue)
+                commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvOpaqueOnly, dispatchParams.ColorOpaqueOnly.Value, 0, RenderTextureSubElement.Color);
+            
+            if (dispatchParams.Color.HasValue)
+                commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvInputColor, dispatchParams.Color.Value, 0, RenderTextureSubElement.Color);
+            
+            if (dispatchParams.MotionVectors.HasValue)
+                commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvInputMotionVectors, dispatchParams.MotionVectors.Value);
+            
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvPrevColorPreAlpha, Resources.PrevPreAlpha[frameIndex ^ 1]);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvPrevColorPostAlpha, Resources.PrevPostAlpha[frameIndex ^ 1]);
+
+            if (dispatchParams.Reactive.HasValue)
+                commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvReactiveMask, dispatchParams.Reactive.Value);
+
+            if (dispatchParams.TransparencyAndComposition.HasValue)
+                commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.SrvTransparencyAndCompositionMask, dispatchParams.TransparencyAndComposition.Value);
+
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.UavAutoReactive, Resources.AutoReactive);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.UavAutoComposition, Resources.AutoComposition);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.UavPrevColorPreAlpha, Resources.PrevPreAlpha[frameIndex]);
+            commandBuffer.SetComputeTextureParam(ComputeShader, KernelIndex, Fsr2ShaderIDs.UavPrevColorPostAlpha, Resources.PrevPostAlpha[frameIndex]);
+            
+            commandBuffer.SetComputeConstantBufferParam(ComputeShader, Fsr2ShaderIDs.CbFsr2, Constants, 0, Marshal.SizeOf<Fsr2.Fsr2Constants>());
+            commandBuffer.SetComputeConstantBufferParam(ComputeShader, Fsr2ShaderIDs.CbGenReactive, _tcrAutogenerateConstants, 0, Marshal.SizeOf<Fsr2.GenerateReactiveConstants2>());
+            
+            commandBuffer.DispatchCompute(ComputeShader, KernelIndex, dispatchX, dispatchY, 1);
+        }
+    }
 }

Assets/Scripts/Core/Fsr2Resources.cs

@@ -36,10 +36,14 @@ namespace FidelityFX
         public Texture2D MaximumBiasLut;
         public RenderTexture AutoExposure;
         public RenderTexture SceneLuminance;
+        public RenderTexture AutoReactive;
+        public RenderTexture AutoComposition;
         public readonly RenderTexture[] DilatedMotionVectors = new RenderTexture[2];
         public readonly RenderTexture[] LockStatus = new RenderTexture[2];
         public readonly RenderTexture[] InternalUpscaled = new RenderTexture[2];
         public readonly RenderTexture[] LumaHistory = new RenderTexture[2];
+        public readonly RenderTexture[] PrevPreAlpha = new RenderTexture[2];
+        public readonly RenderTexture[] PrevPostAlpha = new RenderTexture[2];
 
         public void Create(Fsr2.ContextDescription contextDescription)
         {
@@ -104,6 +108,23 @@ namespace FidelityFX
             CreateDoubleBufferedResource(LumaHistory, "FSR2_LumaHistory", contextDescription.DisplaySize, GraphicsFormat.R8G8B8A8_UNorm);
         }
 
+        public void CreateTcrAutogenResources(Fsr2.ContextDescription contextDescription)
+        {
+            // Resource FSR2_AutoReactive: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R8_UNORM, FFX_RESOURCE_FLAGS_NONE
+            AutoReactive = new RenderTexture(contextDescription.MaxRenderSize.x, contextDescription.MaxRenderSize.y, 0, GraphicsFormat.R8_UNorm) { name = "FSR2_AutoReactive", enableRandomWrite = true };
+            AutoReactive.Create();
+
+            // Resource FSR2_AutoComposition: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R8_UNORM, FFX_RESOURCE_FLAGS_NONE
+            AutoComposition = new RenderTexture(contextDescription.MaxRenderSize.x, contextDescription.MaxRenderSize.y, 0, GraphicsFormat.R8_UNorm) { name = "FSR2_AutoComposition", enableRandomWrite = true };
+            AutoComposition.Create();
+
+            // Resources FSR2_PrevPreAlpha0/1: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R11G11B10_FLOAT, FFX_RESOURCE_FLAGS_NONE
+            CreateDoubleBufferedResource(PrevPreAlpha, "FSR2_PrevPreAlpha", contextDescription.MaxRenderSize, GraphicsFormat.B10G11R11_UFloatPack32);
+
+            // Resources FSR2_PrevPostAlpha0/1: FFX_RESOURCE_USAGE_UAV, FFX_SURFACE_FORMAT_R11G11B10_FLOAT, FFX_RESOURCE_FLAGS_NONE
+            CreateDoubleBufferedResource(PrevPostAlpha, "FSR2_PrevPostAlpha", contextDescription.MaxRenderSize, GraphicsFormat.B10G11R11_UFloatPack32);
+        }
+
         private static void CreateDoubleBufferedResource(RenderTexture[] resource, string name, Vector2Int size, GraphicsFormat format)
         {
             for (int i = 0; i < 2; ++i)
@@ -115,6 +136,8 @@ namespace FidelityFX
 
         public void Destroy()
         {
+            DestroyTcrAutogenResources();
+            
             DestroyResource(LumaHistory);
             DestroyResource(InternalUpscaled);
             DestroyResource(LockStatus);
@@ -127,6 +150,14 @@ namespace FidelityFX
             DestroyResource(ref LanczosLut);
         }
 
+        public void DestroyTcrAutogenResources()
+        {
+            DestroyResource(PrevPostAlpha);
+            DestroyResource(PrevPreAlpha);
+            DestroyResource(ref AutoComposition);
+            DestroyResource(ref AutoReactive);
+        }
+        
         private static void DestroyResource(ref Texture2D resource)
         {
             if (resource == null)

Assets/Scripts/Core/Fsr2ShaderIDs.cs

@@ -47,6 +47,8 @@ namespace FidelityFX
         internal static readonly int SrvSceneLuminanceMips = Shader.PropertyToID("r_imgMips");
         internal static readonly int SrvUpscaleMaximumBiasLut = Shader.PropertyToID("r_upsample_maximum_bias_lut");
         internal static readonly int SrvDilatedReactiveMasks = Shader.PropertyToID("r_dilated_reactive_masks");
+        internal static readonly int SrvPrevColorPreAlpha = Shader.PropertyToID("r_input_prev_color_pre_alpha");
+        internal static readonly int SrvPrevColorPostAlpha = Shader.PropertyToID("r_input_prev_color_post_alpha");
 
         // Unordered access views, i.e. random read/write bindings
         internal static readonly int UavReconstructedPrevNearestDepth = Shader.PropertyToID("rw_reconstructed_previous_nearest_depth");
@@ -65,6 +67,9 @@ namespace FidelityFX
         internal static readonly int UavAutoExposure = Shader.PropertyToID("rw_auto_exposure");
         internal static readonly int UavSpdAtomicCount = Shader.PropertyToID("rw_spd_global_atomic");
         internal static readonly int UavAutoReactive = Shader.PropertyToID("rw_output_autoreactive");
+        internal static readonly int UavAutoComposition = Shader.PropertyToID("rw_output_autocomposition");
+        internal static readonly int UavPrevColorPreAlpha = Shader.PropertyToID("rw_output_prev_color_pre_alpha");
+        internal static readonly int UavPrevColorPostAlpha = Shader.PropertyToID("rw_output_prev_color_post_alpha");
 
         // Constant buffer bindings
         internal static readonly int CbFsr2 = Shader.PropertyToID("cbFSR2");

Assets/Scripts/Fsr2ImageEffect.cs

@@ -75,6 +75,25 @@ namespace FidelityFX
             public Fsr2.GenerateReactiveFlags flags = Fsr2.GenerateReactiveFlags.ApplyTonemap | Fsr2.GenerateReactiveFlags.ApplyThreshold | Fsr2.GenerateReactiveFlags.UseComponentsMax;
         }
 
+        [Tooltip("(Experimental) Automatically generate and use Reactive mask and Transparency & composition mask internally.")]
+        public bool autoGenerateTransparencyAndComposition = false;
+        [Tooltip("Parameters to control the process of auto-generating transparency and composition masks.")]
+        [SerializeField] private GenerateTcrParameters generateTransparencyAndCompositionParameters = new GenerateTcrParameters();
+        public GenerateTcrParameters GenerateTcrParams => generateTransparencyAndCompositionParameters;
+        
+        [Serializable]
+        public class GenerateTcrParameters
+        {
+            [Tooltip("Setting this value too small will cause visual instability. Larger values can cause ghosting.")]
+            [Range(0, 1)] public float autoTcThreshold = 0.05f;
+            [Tooltip("Smaller values will increase stability at hard edges of translucent objects.")]
+            [Range(0, 2)] public float autoTcScale = 1.0f;
+            [Tooltip("Larger values result in more reactive pixels.")]
+            [Range(0, 10)] public float autoReactiveScale = 5.0f;
+            [Tooltip("Maximum value reactivity can reach.")]
+            [Range(0, 1)] public float autoReactiveMax = 0.9f;
+        }
+
         [Header("Output resources")]
         [Tooltip("Optional render texture to copy motion vector data to, for additional post-processing after upscaling.")]
         public RenderTexture outputMotionVectors;
@@ -97,6 +116,7 @@ namespace FidelityFX
         private Fsr2.QualityMode _prevQualityMode;
         private Vector2Int _prevDisplaySize;
         private bool _prevGenReactiveMask;
+        private bool _prevGenTcrMasks;
 
         private CommandBuffer _dispatchCommandBuffer;
         private CommandBuffer _opaqueInputCommandBuffer;
@@ -155,7 +175,7 @@ namespace FidelityFX
             _opaqueInputCommandBuffer.GetTemporaryRT(Fsr2ShaderIDs.SrvOpaqueOnly, _renderSize.x, _renderSize.y, 0, default, GetDefaultFormat());
             _opaqueInputCommandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, Fsr2ShaderIDs.SrvOpaqueOnly);
 
-            if (autoGenerateReactiveMask)
+            if (autoGenerateReactiveMask || autoGenerateTransparencyAndComposition)
             {
                 _renderCamera.AddCommandBuffer(CameraEvent.BeforeForwardAlpha, _opaqueInputCommandBuffer);
             }
@@ -165,6 +185,7 @@ namespace FidelityFX
             _prevDisplaySize = _displaySize;
             _prevQualityMode = qualityMode;
             _prevGenReactiveMask = autoGenerateReactiveMask;
+            _prevGenTcrMasks = autoGenerateTransparencyAndComposition;
         }
 
         private void OnDisable()
@@ -216,14 +237,15 @@ namespace FidelityFX
                 OnEnable();
             }
 
-            if (autoGenerateReactiveMask != _prevGenReactiveMask)
+            if ((autoGenerateReactiveMask || autoGenerateTransparencyAndComposition) != (_prevGenReactiveMask || _prevGenTcrMasks))
             {
-                if (autoGenerateReactiveMask)
+                if (autoGenerateReactiveMask || autoGenerateTransparencyAndComposition)
                     _renderCamera.AddCommandBuffer(CameraEvent.BeforeForwardAlpha, _opaqueInputCommandBuffer);
                 else
                     _renderCamera.RemoveCommandBuffer(CameraEvent.BeforeForwardAlpha, _opaqueInputCommandBuffer);
                 
                 _prevGenReactiveMask = autoGenerateReactiveMask;
+                _prevGenTcrMasks = autoGenerateTransparencyAndComposition;
             }
         }
 
@@ -288,6 +310,15 @@ namespace FidelityFX
             _dispatchDescription.Reset = _reset;
             _reset = false;
 
+            _dispatchDescription.EnableAutoReactive = autoGenerateTransparencyAndComposition;
+            if (autoGenerateTransparencyAndComposition)
+            {
+                _dispatchDescription.AutoTcThreshold = generateTransparencyAndCompositionParameters.autoTcThreshold;
+                _dispatchDescription.AutoTcScale = generateTransparencyAndCompositionParameters.autoTcScale;
+                _dispatchDescription.AutoReactiveScale = generateTransparencyAndCompositionParameters.autoReactiveScale;
+                _dispatchDescription.AutoReactiveMax = generateTransparencyAndCompositionParameters.autoReactiveMax;
+            }
+
             if (SystemInfo.usesReversedZBuffer)
             {
                 // Swap the near and far clip plane distances as FSR2 expects this when using inverted depth
@@ -359,6 +390,11 @@ namespace FidelityFX
                 _dispatchCommandBuffer.ReleaseTemporaryRT(Fsr2ShaderIDs.UavAutoReactive);
             }
 
+            if (autoGenerateTransparencyAndComposition)
+            {
+                _dispatchCommandBuffer.ReleaseTemporaryRT(Fsr2ShaderIDs.SrvOpaqueOnly);
+            }
+
             Graphics.ExecuteCommandBuffer(_dispatchCommandBuffer);
 
             // Shut up the Unity warning about not writing to the destination texture