1 files changed, 136 insertions, 0 deletions
diff --git a/thirdparty/amd-fsr2/shaders/ffx_fsr2_reproject.h b/thirdparty/amd-fsr2/shaders/ffx_fsr2_reproject.h
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+++ b/thirdparty/amd-fsr2/shaders/ffx_fsr2_reproject.h
@@ -0,0 +1,136 @@
+// 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.
+
+#ifndef FFX_FSR2_REPROJECT_H
+#define FFX_FSR2_REPROJECT_H
+
+#ifndef FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE
+#define FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE 0 // Reference
+#endif
+
+FfxFloat32x4 WrapHistory(FfxInt32x2 iPxSample)
+{
+    return LoadHistory(iPxSample);
+}
+
+#if FFX_HALF
+FFX_MIN16_F4 WrapHistory(FFX_MIN16_I2 iPxSample)
+{
+    return FFX_MIN16_F4(LoadHistory(iPxSample));
+}
+#endif
+
+
+#if FFX_FSR2_OPTION_REPROJECT_SAMPLERS_USE_DATA_HALF && FFX_HALF
+DeclareCustomFetchBicubicSamplesMin16(FetchHistorySamples, WrapHistory)
+DeclareCustomTextureSampleMin16(HistorySample, FFX_FSR2_GET_LANCZOS_SAMPLER1D(FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE), FetchHistorySamples)
+#else
+DeclareCustomFetchBicubicSamples(FetchHistorySamples, WrapHistory)
+DeclareCustomTextureSample(HistorySample, FFX_FSR2_GET_LANCZOS_SAMPLER1D(FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE), FetchHistorySamples)
+#endif
+
+FfxFloat32x4 WrapLockStatus(FfxInt32x2 iPxSample)
+{
+    FfxFloat32x4 fSample = FfxFloat32x4(LoadLockStatus(iPxSample), 0.0f, 0.0f);
+    return fSample;
+}
+
+#if FFX_HALF
+FFX_MIN16_F4 WrapLockStatus(FFX_MIN16_I2 iPxSample)
+{
+    FFX_MIN16_F4 fSample = FFX_MIN16_F4(LoadLockStatus(iPxSample), 0.0, 0.0);
+
+    return fSample;
+}
+#endif
+
+#if 1
+#if FFX_FSR2_OPTION_REPROJECT_SAMPLERS_USE_DATA_HALF && FFX_HALF
+DeclareCustomFetchBilinearSamplesMin16(FetchLockStatusSamples, WrapLockStatus)
+DeclareCustomTextureSampleMin16(LockStatusSample, Bilinear, FetchLockStatusSamples)
+#else
+DeclareCustomFetchBilinearSamples(FetchLockStatusSamples, WrapLockStatus)
+DeclareCustomTextureSample(LockStatusSample, Bilinear, FetchLockStatusSamples)
+#endif
+#else
+#if FFX_FSR2_OPTION_REPROJECT_SAMPLERS_USE_DATA_HALF && FFX_HALF
+DeclareCustomFetchBicubicSamplesMin16(FetchLockStatusSamples, WrapLockStatus)
+DeclareCustomTextureSampleMin16(LockStatusSample, FFX_FSR2_GET_LANCZOS_SAMPLER1D(FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE), FetchLockStatusSamples)
+#else
+DeclareCustomFetchBicubicSamples(FetchLockStatusSamples, WrapLockStatus)
+DeclareCustomTextureSample(LockStatusSample, FFX_FSR2_GET_LANCZOS_SAMPLER1D(FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE), FetchLockStatusSamples)
+#endif
+#endif
+
+FfxFloat32x2 GetMotionVector(FfxInt32x2 iPxHrPos, FfxFloat32x2 fHrUv)
+{
+#if FFX_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS
+    FfxFloat32x2 fDilatedMotionVector = LoadDilatedMotionVector(FFX_MIN16_I2(fHrUv * RenderSize()));
+#else
+    FfxFloat32x2 fDilatedMotionVector = LoadInputMotionVector(iPxHrPos);
+#endif
+
+    return fDilatedMotionVector;
+}
+
+FfxBoolean IsUvInside(FfxFloat32x2 fUv)
+{
+    return (fUv.x >= 0.0f && fUv.x <= 1.0f) && (fUv.y >= 0.0f && fUv.y <= 1.0f);
+}
+
+void ComputeReprojectedUVs(const AccumulationPassCommonParams params, FFX_PARAMETER_OUT FfxFloat32x2 fReprojectedHrUv, FFX_PARAMETER_OUT FfxBoolean bIsExistingSample)
+{
+    fReprojectedHrUv = params.fHrUv + params.fMotionVector;
+
+    bIsExistingSample = IsUvInside(fReprojectedHrUv);
+}
+
+void ReprojectHistoryColor(const AccumulationPassCommonParams params, FFX_PARAMETER_OUT FfxFloat32x3 fHistoryColor, FFX_PARAMETER_OUT FfxFloat32 fTemporalReactiveFactor, FFX_PARAMETER_OUT FfxBoolean bInMotionLastFrame)
+{
+    FfxFloat32x4 fHistory = HistorySample(params.fReprojectedHrUv, DisplaySize());
+
+    fHistoryColor = PrepareRgb(fHistory.rgb, Exposure(), PreviousFramePreExposure());
+
+    fHistoryColor = RGBToYCoCg(fHistoryColor);
+
+    //Compute temporal reactivity info
+    fTemporalReactiveFactor = ffxSaturate(abs(fHistory.w));
+    bInMotionLastFrame = (fHistory.w < 0.0f);
+}
+
+LockState ReprojectHistoryLockStatus(const AccumulationPassCommonParams params, FFX_PARAMETER_OUT FfxFloat32x2 fReprojectedLockStatus)
+{
+    LockState state = { FFX_FALSE, FFX_FALSE };
+    const FfxFloat32 fNewLockIntensity = LoadRwNewLocks(params.iPxHrPos);
+    state.NewLock = fNewLockIntensity > (127.0f / 255.0f);
+
+    FfxFloat32 fInPlaceLockLifetime = state.NewLock ? fNewLockIntensity : 0;
+
+    fReprojectedLockStatus = SampleLockStatus(params.fReprojectedHrUv);
+
+    if (fReprojectedLockStatus[LOCK_LIFETIME_REMAINING] != FfxFloat32(0.0f)) {
+        state.WasLockedPrevFrame = true;
+    }
+
+    return state;
+}
+
+#endif //!defined( FFX_FSR2_REPROJECT_H )