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50 lines
1.4 KiB
Markdown
50 lines
1.4 KiB
Markdown
# AMD FSR2 Integration Notes
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This project currently has two FSR2 states:
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- `AMD FidelityFX SDK` backend (preferred): enabled when SDK sources are present.
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- `Internal fallback` backend: used when SDK is missing.
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## SDK Location
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Drop AMD's official FSR2 repo at:
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`extern/FidelityFX-FSR2`
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Expected header for detection:
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`extern/FidelityFX-FSR2/src/ffx-fsr2-api/ffx_fsr2.h`
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## Build Flags
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- `WOWEE_ENABLE_AMD_FSR2=ON` (default): try to use AMD SDK if detected.
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- `WOWEE_HAS_AMD_FSR2` compile define:
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- `1` when SDK header is found.
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- `0` otherwise (fallback path).
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## Current Status
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- CMake detects the SDK and defines `WOWEE_HAS_AMD_FSR2`.
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- UI shows active FSR2 backend label in settings.
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- Runtime logs clearly indicate whether AMD SDK is available.
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## Remaining Work (to finish official AMD path)
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1. Add backend wrapper around `FfxFsr2Context` and Vulkan backend helpers.
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2. Feed required inputs each frame:
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- Color, depth, motion vectors
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- Jitter offsets
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- Delta time and render/display resolution
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- Exposure / reactive mask as needed
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3. Replace custom compute accumulation path with `ffxFsr2ContextDispatch`.
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4. Keep current fallback path behind a runtime switch for safety.
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5. Add a debug overlay:
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- Backend in use
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- Internal resolution
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- Jitter values
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- Motion vector validity stats
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6. Validate with fixed camera + movement sweeps:
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- Static shimmer
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- Moving blur/ghosting
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- Fine geometry stability
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