Add SurfaceGetPreferredFormat standard method

This is a standard method from webgpu.h that has been missing forever.
AFAIK Dawn in native context only supports BGRA8Unorm, so it is natural
to implement this method to always return this value.

This makes compatibility with other WebGPU backends easier, and gets
Dawn one small step closer to standard compliance (though I guess it'll
have to be reworked once other surface formats are available in native
mode).

Bug: dawn:1362
Change-Id: I2829d0091346fd19a28c16eba965140f85082239
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/167560
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Élie Michel <elie.michel.fr@gmail.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
9 files changed
tree: 22030950bea3e55cec727d1a86951d9ebe533313
  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. .bazelrc
  15. .clang-format
  16. .clang-tidy
  17. .gitattributes
  18. .gitignore
  19. .gitmodules
  20. .gn
  21. AUTHORS
  22. BUILD.bazel
  23. BUILD.gn
  24. CMakeLists.txt
  25. CMakeSettings.json
  26. CODE_OF_CONDUCT.md
  27. codereview.settings
  28. CONTRIBUTING.md
  29. CPPLINT.cfg
  30. DEPS
  31. DIR_METADATA
  32. Doxyfile
  33. go.mod
  34. go.sum
  35. go_presubmit_support.py
  36. LICENSE
  37. OWNERS
  38. PRESUBMIT.py
  39. README.chromium
  40. README.md
  41. 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.