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dawn/dawn/f9028eb3b676595fcf645aed3f4aae5a911fcff7
commit
f9028eb3b676595fcf645aed3f4aae5a911fcff7
[log]
author
shaoboyan <shaoboyan@microsoft.com>
Wed Aug 12 03:34:35 2026 -0700
committer
dawn-scoped@luci-project-accounts.iam.gserviceaccount.com <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Wed Aug 12 03:34:35 2026 -0700
tree
80941c463c32a975dc9e7d02bd4ebd655a5e646b
parent
99d780bd46783826d6a29ddb02f92a221c308974 [diff]
Store Dynamic Storage Buffer Lengths and Offsets in D3D12 Immediates

Pass dynamic storage buffer lengths and offsets to shaders through the
immediate block instead of dedicated uniform buffers, so they no longer
consume uniform register space and match how other D3D12 pipeline
immediates are handled.

The lengths and offsets are stored as array<u32> in the immediate block,
so their compacted members only require 4-byte alignment and no longer
need reserved padding slots to reach a 16-byte boundary.

Bug: 366291600
Change-Id: Ic1589152a419b736749a840ce5e56ae8d184bad1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/321575
Commit-Queue: Shaobo Yan <shaoboyan@microsoft.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
10 files changed
tree: 80941c463c32a975dc9e7d02bd4ebd655a5e646b
  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. .vpython3
  31. AUTHORS
  32. BUILD.bazel
  33. BUILD.gn
  34. CMakeLists.txt
  35. CMakeSettings.json
  36. CODE_OF_CONDUCT.md
  37. codereview.settings
  38. CONTRIBUTING.md
  39. CPPLINT.cfg
  40. DEPS
  41. DIR_METADATA
  42. go.mod
  43. go.sum
  44. go_presubmit_support.py
  45. LICENSE
  46. MODULE.bazel
  47. MODULE.bazel.lock
  48. OWNERS
  49. PRESUBMIT.py
  50. PRESUBMIT_test.py
  51. README.chromium
  52. README.md
  53. unsafe_buffers_paths.txt
  54. WATCHLISTS
  55. 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.