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dawn / dawn / refs/heads/main
commit8ea3310e380e4ca95eb160853490ceda2805794f[log] [tgz]
authorKyle Charbonneau <kylechar@google.com>Thu Jan 23 20:04:35 2025 -0800
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Jan 23 20:04:35 2025 -0800
treeb6fa45bbf59cc7ccd308e8368e3eb03d37dac2fe
parent363b4f1a08225b73f347e0330ba6d872139af201 [diff]
Implement Vulkan compatibility mode

Adds support for compatibility mode in the Vulkan backend. Not all
Vulkan 1.1 devices support the minimum core limits that WebGPU requires,
eg. Mali-G71 GPUs have maxColorAttachments=4 and core requires
8. Ganesh/Vulkan runs on some devices today. We need to be able to run
   Graphite/Dawn/Vulkan on them as well.

If a FeatureLevel::Compatibility adapter was requested then don't
require depthBiasClamp, imageCubeArray and independentBlend features and
use lower compatibility limits.

Note that if a PhysicalDevice fails to support core feature level a
warning is recorded describing why. This can't use the existing warning
logging since that is tied to PhysicalDevice initialization failure
which doesn't happen if the device supports compat.

Bug: 389016529
Change-Id: I2f6e713f13494ec2e8effad33b3448b531673485
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/222117
Commit-Queue: Kyle Charbonneau <kylechar@google.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
21 files changed
tree: b6fa45bbf59cc7ccd308e8368e3eb03d37dac2fe
  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. .git-blame-ignore-revs
  21. .gitattributes
  22. .gitignore
  23. .gitmodules
  24. .gn
  25. AUTHORS
  26. BUILD.bazel
  27. BUILD.gn
  28. CMakeLists.txt
  29. CMakeSettings.json
  30. CODE_OF_CONDUCT.md
  31. codereview.settings
  32. CONTRIBUTING.md
  33. CPPLINT.cfg
  34. DEPS
  35. DIR_METADATA
  36. go.mod
  37. go.sum
  38. go_presubmit_support.py
  39. LICENSE
  40. OWNERS
  41. PRESUBMIT.py
  42. README.chromium
  43. README.md
  44. WATCHLISTS
  45. 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.