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iChris4andClaude Opus 5.5
cc653272c8
- Eyes render under a VK_EXT_fragment_density_map: full rate around each eye's forward direction, 2x2 then 4x4 pixel blocks towards the edges ([vr] foveation = off|low|medium|high, default off). XR_FB_foveation cannot help here: the runtime's maps only shape passes drawing into its swapchain, and the eyes reach it through a copy. - aurora-main/patches/dawn/aurora_fdm.inc: Dawn enables the extension only on request and for dynamic rendering, flags every render pipeline, and chains an immutable RG8 map into any pass whose first color attachment is a view bound to one (ABI: include/aurora/dawn_fdm_abi.h). - android/Build-QuestDawn.ps1 builds the pinned Dawn revision with those patches for arm64 (dawn-build CI flags, protobuf off) into a cached package; Build-Quest.ps1 links it (-StockDawn opts out) and AuroraDawnProvider.cmake enables the ABI from its manifest. - lib/gfx/foveation.hpp generates the maps (32 px per texel, densities 255/127/63); an eye is foveated only when single_pass_eyes draws it in one render pass. Menus never are. - Live level from the headset panel's VR tab and the launcher; the launch decides whether the device has maps. debug.wiicompiled.foveation and debug.wiicompiled.fdm for A/B. - Tests: Foveation cases in gx_fifo_tests, mkw_vr_config_tests. Docs: OPENXR.md, quest-port.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
28 lines
1.1 KiB
C++
28 lines
1.1 KiB
C++
#pragma once
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#include <cstdint>
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#include <webgpu/webgpu_cpp.h>
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// Fragment density maps for foveated eye rendering, through the ABI of a Dawn built with Aurora's
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// patches (include/aurora/dawn_fdm_abi.h, the Quest build). Against any other Dawn the maps are
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// simply unavailable.
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namespace aurora::webgpu::fdm {
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// Before the device is requested: whether to ask Dawn for VK_EXT_fragment_density_map.
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void request(bool wanted) noexcept;
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// Once the device exists: reads what Dawn enabled, and logs it.
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void device_created() noexcept;
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bool available() noexcept;
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// Framebuffer pixels per density map texel, in each direction.
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uint32_t texel_size() noexcept;
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// An immutable RG8 map of `width` by `height` texels, or 0. Usable once map_ready.
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uint64_t create_map(uint32_t width, uint32_t height, const uint8_t* rg8) noexcept;
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bool map_ready(uint64_t map) noexcept;
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void release_map(uint64_t map) noexcept;
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// Render passes whose first color attachment is `view` get `map` while it is ready; 0 unbinds.
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bool bind(const wgpu::TextureView& view, uint64_t map) noexcept;
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} // namespace aurora::webgpu::fdm
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