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dawn / dawn / 563fe25db020e87742d09b0a11db3ec423fa5285
commit563fe25db020e87742d09b0a11db3ec423fa5285[log] [tgz]
authorAustin Eng <enga@chromium.org>Sat Apr 27 16:46:49 2024 +0000
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Sat Apr 27 16:46:49 2024 +0000
tree74cc73d332ba7d14f09233f53b4c7888d2194b77
parent544321a458b5cbd1d803e7df76d8262e23068f5d [diff]
cpp: allow casting C++ struct reference types to C types

This is safe because the C++ layout is static_assert'ed to be the
same as the C layout. It removes bad-looking reinterpret_cast
from application code.

Mutable reference casts are not allowed. This is because:
 - Some C++ structs have RAII objects in them. Casting to C and
   then changing the members could cause unexpected lifetime
   changes
 - Structs with "free members" functions only get const conversion
   operators. This is because output structs like this have RAII data
   which should not be mutated. The C structs do not have
   const-qualified members, so conversion to a mutable C struct would
   be unsafe.

Bug: chromium:40195122
Change-Id: I18cd06b04da2ea34803f517e2b640ceaaba408af
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/185966
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
1 file changed
tree: 74cc73d332ba7d14f09233f53b4c7888d2194b77
  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-tidy
  20. .gitattributes
  21. .gitignore
  22. .gitmodules
  23. .gn
  24. AUTHORS
  25. BUILD.bazel
  26. BUILD.gn
  27. CMakeLists.txt
  28. CMakeSettings.json
  29. CODE_OF_CONDUCT.md
  30. codereview.settings
  31. CONTRIBUTING.md
  32. CPPLINT.cfg
  33. DEPS
  34. DIR_METADATA
  35. go.mod
  36. go.sum
  37. go_presubmit_support.py
  38. LICENSE
  39. OWNERS
  40. PRESUBMIT.py
  41. README.chromium
  42. README.md
  43. 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.