Fixes for accumulate pass

Assets/Shaders/FSR3/ffx_fsr3upscaler_accumulate_pass.compute

@@ -1,4 +1,4 @@
-// Copyright (c) 2023 Nico de Poel
+// Copyright (c) 2024 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

Assets/Shaders/FSR3/ffx_fsr3upscaler_unity_common.cginc

@@ -21,6 +21,7 @@
 // Suppress a few warnings produced by FFX's HLSL code
 #pragma warning(disable: 3078)      // Loop control variable conflicts
 #pragma warning(disable: 3203)      // Signed/unsigned mismatch
+#pragma warning(disable: 3556)      // Integer divides might be much slower, try using uints if possible
 
 #define FFX_GPU         // Compiling for GPU
 #define FFX_HLSL        // Compile for plain HLSL

Assets/Shaders/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_accumulate.h

@@ -114,7 +114,7 @@ void InitPassData(FfxInt32x2 iPxHrPos, FFX_PARAMETER_INOUT AccumulationPassCommo
     params.fMotionVector                = GetMotionVector(iPxHrPos, fHrUv);
     params.f4KVelocity                  = Get4KVelocity(params.fMotionVector);
 
-    ComputeReprojectedUVs(params);
+    ComputeReprojectedUVs(params, params.fReprojectedHrUv, params.bIsExistingSample);
 
     const FfxFloat32x2 fLumaInstabilityUv_HW  = ClampUv(fHrUv, RenderSize(), MaxRenderSize());
     params.fLumaInstabilityFactor       = SampleLumaInstability(fLumaInstabilityUv_HW);
@@ -131,6 +131,7 @@ void InitPassData(FfxInt32x2 iPxHrPos, FFX_PARAMETER_INOUT AccumulationPassCommo
     params.fAccumulation *= FfxFloat32(round(params.fAccumulation * 100.0f) > 1.0f);
 
     // Init variable data
+    data = (AccumulationPassData)0;
     data.fUpsampledColor                = FfxFloat32x3(0.0f, 0.0f, 0.0f);
     data.fHistoryColor                  = FfxFloat32x3(0.0f, 0.0f, 0.0f);
     data.fHistoryWeight                 = 1.0f;

Assets/Shaders/FSR3/shaders/fsr3upscaler/ffx_fsr3upscaler_reproject.h

@@ -43,11 +43,11 @@ FfxFloat32x2 GetMotionVector(FfxInt32x2 iPxHrPos, FfxFloat32x2 fHrUv)
     return fDilatedMotionVector;
 }
 
-void ComputeReprojectedUVs(FFX_PARAMETER_INOUT AccumulationPassCommonParams params)
+void ComputeReprojectedUVs(const AccumulationPassCommonParams params, FFX_PARAMETER_OUT FfxFloat32x2 fReprojectedHrUv, FFX_PARAMETER_OUT FfxBoolean bIsExistingSample)
 {
-    params.fReprojectedHrUv = params.fHrUv + params.fMotionVector;
+    fReprojectedHrUv = params.fHrUv + params.fMotionVector;
 
-    params.bIsExistingSample = IsUvInside(params.fReprojectedHrUv);
+    bIsExistingSample = IsUvInside(fReprojectedHrUv);
 }
 
 void ReprojectHistoryColor(const AccumulationPassCommonParams params, FFX_PARAMETER_INOUT AccumulationPassData data)