Revert "Switch to Ubuntu 22 for builders"

This reverts commit 2657d684feba4ba1870c6d2794ee36bcaaafc424.

Reason for revert: Causing CMake bot failures as X11 isn't installed on the Ubuntu 22 bot's image.

Original change's description:
> Switch to Ubuntu 22 for builders
>
> Switches from Ubuntu 18 to Ubuntu 22 for Dawn builders since Ubuntu 18
> is ancient and infra is trying to remove all uses of it.
>
> Bug: chromium:336842914
> Change-Id: Ie75b833d3e897251864948281a706ede53578fb6
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/185882
> Reviewed-by: Austin Eng <enga@chromium.org>
> Commit-Queue: Brian Sheedy <bsheedy@google.com>
> Commit-Queue: Austin Eng <enga@chromium.org>
> Auto-Submit: Brian Sheedy <bsheedy@google.com>

TBR=enga@chromium.org,bsheedy@google.com,dawn-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: Ie5182ecc6560c992ec0a8e0f9a299fcd8ea86b71
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:336842914
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/185846
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
2 files changed
tree: 202379d8f72ee39e784380cfd59eb425946035d3
  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. go.mod
  33. go.sum
  34. go_presubmit_support.py
  35. LICENSE
  36. OWNERS
  37. PRESUBMIT.py
  38. README.chromium
  39. README.md
  40. 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.