Google Git
Sign in
dawn / dawn / 1b3b29437f3f5f1bd371e8236853a72169a7c773
commit1b3b29437f3f5f1bd371e8236853a72169a7c773[log] [tgz]
authorAntonio Maiorano <amaiorano@google.com>Mon Oct 27 07:24:59 2025 -0700
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Mon Oct 27 07:24:59 2025 -0700
treeda3068de5bbb35a2716bba9115c2969497944307
parent0368e499eb97e4f6ac070749761e9949981259f5 [diff]
tint/hlsl: add ArrayOffsetFromUniform transform

ArrayOffsetFromUniform is a transform that adds an offset to storage
buffer loads and stores provided via a uniform buffer.

This will be used by the D3D12 backend to optimize root signature slot
usage. Instead of binding dynamic storage buffers to root descriptors at
the input dynamic offsets, these buffers will be bound in the root
descriptor table, and the input dynamic offset stored in root constants.
These offsets need to now be applied in the HLSL shader instead using
this transform in a way very similar to ArrayLengthFromUniform.

After this lands, I'll land the Dawn D3D12 backend changes that use this
transform.

Bug: 449703736
Change-Id: I19fb261070fecdccaa47323594ac2cec943fde63
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/268496
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
11 files changed
tree: da3068de5bbb35a2716bba9115c2969497944307
  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-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. unsafe_buffers_paths.txt
  48. WATCHLISTS
  49. 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.