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FidelityFX FSR v2.2.1
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‎README.md‎

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# FidelityFX Super Resolution 2.2 (FSR 2.2)
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# FidelityFX Super Resolution 2.2 (FSR 2.2.1)
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Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
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@@ -805,6 +805,7 @@ FSR2 requires a GPU with typed UAV load and R16G16B16A16_UNORM support.
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| Version | Date |
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| ---------------|-------------------|
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| **2.2.1** | 2023-05-12 |
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| **2.2.0** | 2023-02-16 |
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| **2.1.2** | 2022-10-19 |
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| **2.1.1** | 2022-09-15 |

‎changelog.md‎

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2023-02-23 | FidelityFX Super Resolution 2.2a
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2023-05-12 | FidelityFX Super Resolution 2.2.1
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-------
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- Fixed comments in API header for incorrect cameraFar use.
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- Fixed DRS issue where resource was not correctly cleared on first use.
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- Fixed issue where luma instability logic could introduce output artefacts with strobing lights.
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- Fixed incorrect luma resource size.
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2023-02-23 | FidelityFX Super Resolution 2.2.0a
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-------
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- Minor updates to the documentation
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- Removal of a handful of files from the prior release that are no longer part of FSR 2.2.
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2023-02-16 | FidelityFX Super Resolution 2.2
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2023-02-16 | FidelityFX Super Resolution 2.2.0
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-------
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- Introduction of API debug checker.
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- Changes to improve "High Velocity Ghosting" situations.

‎release_notes.txt‎

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FidelityFX Super Resolution 2.2
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FidelityFX Super Resolution 2.2.1
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=================================
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4-
Features
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--------
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- API debug Checker
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- Changes to improve "High Velocity Ghosting" situations.
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Changes
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-------
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- Changes to Luminance computation with pre-exposure application.
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- Small motion vectors ignored in previous depth estimation.
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- Changes to depth logic to improve disocclusion detection and avoid self-disocclusions.
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- Dilated reactive mask logic updated to use temporal motion vector divergence to kill locks.
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- New lock luminance resource.
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- Accumulation overhauled to use temporal reactivity.
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- Changed how intermediate signals are stored and tonemapped.
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- Luminance instability logic improved.
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- Tonemapping no longer applied during RCAS to retain more dynamic range.
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- Fixes for multiple user reported issues on GitHub and elsewhere. Thank you for your feedback!
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- Fixed comments in API header for incorrect cameraFar use.
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- Fixed DRS issue where resource was not correctly cleared on first use.
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- Fixed issue where luma instability logic could introduce output artefacts with strobing lights.
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- Fixed incorrect luma resource size.
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Limitations
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-----------

‎src/ffx-fsr2-api/ffx_fsr2.cpp‎

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@@ -516,7 +516,7 @@ static FfxErrorCode fsr2Create(FfxFsr2Context_Private* context, const FfxFsr2Con
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FFX_SURFACE_FORMAT_R16G16_FLOAT, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_NONE },
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{ FFX_FSR2_RESOURCE_IDENTIFIER_LOCK_INPUT_LUMA, L"FSR2_LockInputLuma", (FfxResourceUsage)(FFX_RESOURCE_USAGE_UAV),
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FFX_SURFACE_FORMAT_R16_FLOAT, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },
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FFX_SURFACE_FORMAT_R16_FLOAT, contextDescription->maxRenderSize.width, contextDescription->maxRenderSize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },
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{ FFX_FSR2_RESOURCE_IDENTIFIER_NEW_LOCKS, L"FSR2_NewLocks", (FfxResourceUsage)(FFX_RESOURCE_USAGE_UAV),
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FFX_SURFACE_FORMAT_R8_UNORM, contextDescription->displaySize.width, contextDescription->displaySize.height, 1, FFX_RESOURCE_FLAGS_ALIASABLE },
@@ -788,6 +788,8 @@ static FfxErrorCode fsr2Dispatch(FfxFsr2Context_Private* context, const FfxFsr2D
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context->contextDescription.callbacks.fpScheduleGpuJob(&context->contextDescription.callbacks, &clearJob);
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clearJob.clearJobDescriptor.target = context->srvResources[FFX_FSR2_RESOURCE_IDENTIFIER_LOCK_STATUS_2];
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context->contextDescription.callbacks.fpScheduleGpuJob(&context->contextDescription.callbacks, &clearJob);
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clearJob.clearJobDescriptor.target = context->srvResources[FFX_FSR2_RESOURCE_IDENTIFIER_PREPARED_INPUT_COLOR];
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context->contextDescription.callbacks.fpScheduleGpuJob(&context->contextDescription.callbacks, &clearJob);
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}
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// Prepare per frame descriptor tables

‎src/ffx-fsr2-api/ffx_fsr2.h‎

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/// FidelityFX Super Resolution 2 patch version.
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///
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/// @ingroup FSR2
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#define FFX_FSR2_VERSION_PATCH (0)
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#define FFX_FSR2_VERSION_PATCH (1)
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/// The size of the context specified in 32bit values.
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///
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float preExposure; ///< The pre exposure value (must be > 0.0f)
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bool reset; ///< A boolean value which when set to true, indicates the camera has moved discontinuously.
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float cameraNear; ///< The distance to the near plane of the camera.
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float cameraFar; ///< The distance to the far plane of the camera. This is used only used in case of non infinite depth.
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float cameraFar; ///< The distance to the far plane of the camera.
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float cameraFovAngleVertical; ///< The camera angle field of view in the vertical direction (expressed in radians).
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float viewSpaceToMetersFactor; ///< The scale factor to convert view space units to meters
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‎src/ffx-fsr2-api/shaders/ffx_fsr2_accumulate.h‎

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@@ -135,6 +135,7 @@ FfxFloat32x3 ComputeBaseAccumulationWeight(const AccumulationPassCommonParams pa
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FfxFloat32 ComputeLumaInstabilityFactor(const AccumulationPassCommonParams params, RectificationBox clippingBox, FfxFloat32 fThisFrameReactiveFactor, FfxFloat32 fLuminanceDiff)
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{
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const FfxFloat32 fUnormThreshold = 1.0f / 255.0f;
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const FfxInt32 N_MINUS_1 = 0;
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const FfxInt32 N_MINUS_2 = 1;
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const FfxInt32 N_MINUS_3 = 2;
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FfxFloat32 fMin = abs(fDiffs0);
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if (fMin >= (1.0f / 255.0f)) {
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if (fMin >= fUnormThreshold)
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{
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for (int i = N_MINUS_2; i <= N_MINUS_4; i++) {
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FfxFloat32 fDiffs1 = (fCurrentFrameLuma - fCurrentFrameLumaHistory[i]);
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@@ -168,10 +170,13 @@ FfxFloat32 ComputeLumaInstabilityFactor(const AccumulationPassCommonParams param
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}
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}
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fLumaInstability = FfxFloat32(fMin != abs(fDiffs0));
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const FfxFloat32 fBoxSize = clippingBox.boxVec.x;
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const FfxFloat32 fBoxSizeFactor = ffxPow(ffxSaturate(fBoxSize / 0.1f), 6.0f);
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fLumaInstability *= 1.0f - ffxMax(params.fAccumulationMask, ffxPow(fThisFrameReactiveFactor, 1.0f / 3.0f));
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fLumaInstability *= ffxLerp(1.0f, 0.0f, ffxSaturate(params.fHrVelocity / 20.0f));
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fLumaInstability = FfxFloat32(fMin != abs(fDiffs0)) * fBoxSizeFactor;
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fLumaInstability = FfxFloat32(fLumaInstability > fUnormThreshold);
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179+
fLumaInstability *= 1.0f - ffxMax(params.fAccumulationMask, ffxPow(fThisFrameReactiveFactor, 1.0f / 6.0f));
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}
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//shift history

‎src/ffx-fsr2-api/shaders/ffx_fsr2_depth_clip.h‎

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@@ -216,14 +216,15 @@ FfxFloat32x3 ComputePreparedInputColor(FfxInt32x2 iPxLrPos)
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return fPreparedYCoCg;
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}
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float EvaluateSurface(FfxInt32x2 iPxPos, FfxFloat32x2 fMotionVector)
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FfxFloat32 EvaluateSurface(FfxInt32x2 iPxPos, FfxFloat32x2 fMotionVector)
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{
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FfxFloat32 d0 = GetViewSpaceDepth(LoadReconstructedPrevDepth(iPxPos + FfxInt32x2(0, -1)));
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FfxFloat32 d1 = GetViewSpaceDepth(LoadReconstructedPrevDepth(iPxPos + FfxInt32x2(0, 0)));
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FfxFloat32 d2 = GetViewSpaceDepth(LoadReconstructedPrevDepth(iPxPos + FfxInt32x2(0, 1)));
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return 1.0f - FfxFloat32(((d0 - d1) > (d1 * 0.01f)) && ((d1 - d2) > (d2 * 0.01f)));
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}
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void DepthClip(FfxInt32x2 iPxPos)
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{
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FfxFloat32x2 fDepthUv = (iPxPos + 0.5f) / RenderSize();

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