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dawn/dawn/4b1531a61b638faf8b856f4135a07e29151c2d2b
commit
4b1531a61b638faf8b856f4135a07e29151c2d2b
[log]
author
shaoboyan <shaoboyan@microsoft.com>
Mon Jun 29 23:09:15 2026 -0700
committer
dawn-scoped@luci-project-accounts.iam.gserviceaccount.com <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Mon Jun 29 23:09:15 2026 -0700
tree
79a5f0226591c06d06166c7f0ca72f900aeafe4d
parent
48579713adbafda699f5c96eb844383aeae05eb0 [diff]
[Dawn] Dynamically Allocate Internal Immediates for D3D12 Pipelines

D3D12 pre-allocated root constants for possible internal immediates in
pipeline layouts which waste root signature slots in some cases.

This CL manages all internal immediates with Pipeline ImmediateMask and
delay the root signature creation after internal immediates are determined.
This allows more efficient usage of root signature slots.

Bug:366291600
Change-Id: I95b464fe249f10f87fdfe3d8c136ceb728386042
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/319015
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Shaobo Yan <shaoboyan@microsoft.com>
19 files changed
tree: 79a5f0226591c06d06166c7f0ca72f900aeafe4d
  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. .bazelrc
  19. .bazelversion
  20. .clang-format
  21. .clang-format-ignore
  22. .clang-tidy
  23. .git-blame-ignore-revs
  24. .gitattributes
  25. .gitignore
  26. .gitmodules
  27. .gn
  28. .style.yapf
  29. .vpython3
  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. WATCHLISTS
  54. 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.