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dawn/dawn/1eb6edadce6773ee4f7e34e258246de467a38f5f
commit
1eb6edadce6773ee4f7e34e258246de467a38f5f
[log]
author
Lokbondo Kung <lokokung@google.com>
Fri Sep 18 13:54:30 2026 -0700
committer
dawn-scoped@luci-project-accounts.iam.gserviceaccount.com <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Fri Sep 18 13:54:30 2026 -0700
tree
a094ae9498f87702af5f2c2744248f67d6b289de
parent
e77ccad6c749657703dfec543080200421a6b8f8 [diff]
[utils] Implements RawSpan and ityp::raw_span.

- These span variants are backed with a raw_ptr<T> instead of
  a T*. These variants are intended to be used as member variables
  so that backuprefptr reference tracking isn't skipped when
  using spans.
- This change also updates ReinterpretSpan and SpanAs[Writable]Bytes
  to support usage with the raw span variants.
- To support using raw_ptr whose move operators null out the src,
  we also had to update the relevant constructors to match
  std::span semantics.
- The unit tests are updated to now test both the raw and non-raw
  variants via typed test. Most of the changes are just converting
  from using Span and ityp::span to using macros SPAN and
  ITYP_SPAN. Added new raw_span_tests.cc that verify that the
  raw_ptr tracking is working and that dangling spans crash
  appropriately when the testing environment permits.

Bug: 526537224
Change-Id: I9d6a364e3789f2917b9985c22f15af5153e3f198
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/339076
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Loko Kung <lokokung@google.com>
5 files changed
tree: a094ae9498f87702af5f2c2744248f67d6b289de
  1. .github/
  2. .vscode/
  3. agents/
  4. build_overrides/
  5. docs/
  6. generator/
  7. include/
  8. infra/
  9. scripts/
  10. src/
  11. test/
  12. third_party/
  13. tools/
  14. webgpu-cts/
  15. build
  16. buildtools
  17. testing
  18. .bazelignore
  19. .bazelrc
  20. .bazelversion
  21. .clang-format
  22. .clang-format-ignore
  23. .clang-tidy
  24. .git-blame-ignore-revs
  25. .gitattributes
  26. .gitignore
  27. .gitmodules
  28. .gn
  29. .style.yapf
  30. AUTHORS
  31. BUILD.bazel
  32. BUILD.gn
  33. CMakeLists.txt
  34. CMakeSettings.json
  35. CODE_OF_CONDUCT.md
  36. codereview.settings
  37. CONTRIBUTING.md
  38. CPPLINT.cfg
  39. DEPS
  40. DIR_METADATA
  41. go.mod
  42. go.sum
  43. go_presubmit_support.py
  44. LICENSE
  45. MODULE.bazel
  46. MODULE.bazel.lock
  47. OWNERS
  48. PRESUBMIT.py
  49. PRESUBMIT_test.py
  50. README.chromium
  51. README.md
  52. unsafe_buffers_paths.txt
  53. vpython.toml
  54. vpython.toml.uv.lock
  55. WATCHLISTS
  56. 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.