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dawn/dawn/9d41fdf36977cca92361c6ae2769129bbaaafd9b
commit
9d41fdf36977cca92361c6ae2769129bbaaafd9b
[log]
author
Shrek Shao <shrekshao@google.com>
Tue Mar 24 12:51:39 2026 -0700
committer
Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Tue Mar 24 12:51:39 2026 -0700
tree
189ab9b1d53f11edfdf5f92787617afb4560d1af
parent
30d78a5d37c3963a4668d163e4e97c8d03cf8f5b [diff]
WebGPU Backend: Implement SharedTextureMemory, SharedFence (Metal)

Adds starting implementation of SharedTextureMemory, SharedFence
in the webgpu backend (when inner backend is Metal). This CL should
setup framework and indicates future implementation route for other
inner backends.

Notes:
- Pending Shared Access:
Only call wgpu.sharedTextureMemoryAccess in Texture::SynchronizeTextureBeforeUse if there is GPU Access.
- Added webgpu::Texture::SynchronizeTextureBeforeUse and PrepareResourcesForSyncScope in webgpu::CommandBuffer to correctly track and sync texture states in frontend.
- In metal a GetCommandsScheduledFuture is needed to get a future to wait when EndAccess is called. Since the public WGPUQueue API does not currently expose a way to retrieve a "commands scheduled" future, we do instanceWait on future returned by the inner queue onSubmittedWorkDone to block till the end of access. This is a CPU only wait.

Bug: 483147423
Change-Id: I0d248d61c770e6a9fdbaec7ec72e9243d7bd363b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/292155
Reviewed-by: Loko Kung <lokokung@google.com>
Commit-Queue: Shrek Shao <shrekshao@google.com>
21 files changed
tree: 189ab9b1d53f11edfdf5f92787617afb4560d1af
  1. .github/
  2. .vscode/
  3. build_overrides/
  4. docs/
  5. generator/
  6. include/
  7. infra/
  8. scripts/
  9. src/
  10. test/
  11. third_party/
  12. tools/
  13. webgpu-cts/
  14. build
  15. buildtools
  16. testing
  17. .bazelrc
  18. .clang-format
  19. .clang-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. unsafe_buffers_paths.txt
  48. WATCHLISTS
  49. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the WebGPU standard. More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL. Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.

Dawn provides several WebGPU building blocks:

  • WebGPU C/C++ headers that applications and other building blocks use.
    • The webgpu.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • A “native” implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
  • A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
  • Tint is a compiler for the WebGPU Shader Language (WGSL) that can be used in standalone to convert shaders from and to WGSL.

Helpful links:

Documentation table of content

Developer documentation:

User documentation: (TODO, figure out what overlaps with the webgpu.h docs)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.