phaneron/Kelsidavis-WoWee
1
0
Fork 0
mirror of https://github.com/Kelsidavis/WoWee.git synced 2026-03-22 23:30:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3
Kelsidavis-WoWee/docs/AMD_FSR2_INTEGRATION.md

3 KiB
Raw Blame History

AMD FSR2 Integration Notes

WoWee supports two FSR2 backends at runtime:

  • AMD FidelityFX SDK backend (preferred when available).
  • Internal fallback backend (used when AMD SDK prerequisites are not met).

SDK Location

AMD SDK checkout path:

extern/FidelityFX-FSR2

FidelityFX SDK checkout path (framegen extern):

extern/FidelityFX-SDK (pinned to v1.1.4 in build scripts and CI)

Detection expects:

  • extern/FidelityFX-FSR2/src/ffx-fsr2-api/ffx_fsr2.h
  • extern/FidelityFX-FSR2/src/ffx-fsr2-api/vk/shaders/ffx_fsr2_accumulate_pass_permutations.h
  • If permutation headers are missing in the SDK checkout, WoWee CMake copies a vendored snapshot from:
    • third_party/fsr2_vk_permutations

Build Flags

  • WOWEE_ENABLE_AMD_FSR2=ON (default): attempt AMD backend integration.
  • WOWEE_ENABLE_AMD_FSR3_FRAMEGEN=ON (default): build AMD FSR3 framegen interface probe when FidelityFX-SDK headers are present.
  • WOWEE_HAS_AMD_FSR2 compile define:
    • 1 when AMD SDK prerequisites are present.
    • 0 when missing, in which case internal fallback remains active.
  • WOWEE_HAS_AMD_FSR3_FRAMEGEN compile define:
    • 1 when FidelityFX-SDK FI/OF/FSR3+VK headers are detected.
    • 0 when headers are missing (probe target disabled).

Runtime note:

  • Renderer/UI now expose a persisted experimental framegen toggle.
  • Current runtime status is staged (no FI/OF dispatch yet) until FidelityFX-SDK runtime implementation/shader blob linking is completed.

Current Status

  • AMD FSR2 Vulkan dispatch path is integrated and used when available.
  • UI displays active backend in settings (AMD FidelityFX SDK or Internal fallback).
  • Runtime settings include persisted FSR2 jitter tuning.
  • FidelityFX-SDK v1.1.4 extern is fetched across platforms and validated in Linux CI for Vulkan framegen source presence.
  • Startup safety behavior remains enabled:
    • persisted FSR2 is deferred until IN_WORLD
    • startup falls back unless WOWEE_ALLOW_STARTUP_FSR2=1

FSR Defaults

  • Quality default: Native (100%)
  • UI quality order: Native, Ultra Quality, Quality, Balanced
  • Default sharpness: 1.6
  • Default FSR2 jitter sign: 0.38
  • Performance preset is intentionally removed.

CI Notes

  • build-linux-amd-fsr2 clones AMD's repository and configures with WOWEE_ENABLE_AMD_FSR2=ON.
  • All build jobs clone:
    • GPUOpen-Effects/FidelityFX-FSR2 (master)
    • GPUOpen-LibrariesAndSDKs/FidelityFX-SDK (v1.1.4)
  • Linux CI additionally checks FidelityFX-SDK Vulkan framegen files:
    • ffx_frameinterpolation_callbacks_glsl.h
    • ffx_opticalflow_callbacks_glsl.h
    • CMakeShadersFrameinterpolation.txt
    • CMakeShadersOpticalflow.txt
  • All CI platform jobs build:
    • wowee_fsr3_framegen_amd_vk_probe
  • Some upstream SDK checkouts do not include generated Vulkan permutation headers.
  • WoWee bootstraps those headers from the vendored snapshot so AMD backend builds remain cross-platform and deterministic.
  • If SDK headers are missing entirely, WoWee still falls back to the internal backend.