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dawn / dawn / 952a7dacbf6e40aa0b06a5d73cbf250d38b152f7
commit952a7dacbf6e40aa0b06a5d73cbf250d38b152f7[log] [tgz]
authorBrandon Jones <bajones@chromium.org>Thu Nov 13 13:14:20 2025 -0800
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Nov 13 13:14:20 2025 -0800
treeafcc03d16ff2b8f46393d4c18b1793e7bf253581
parent5420f29ea7eccaa5342e46228958904f5424ee67 [diff]
Optimize Dawn Wire WriteTexture

Reduces the number of memcpys that are done when uploading texture data
via WriteTexture using the wire client. Does so by directly managing the
allocation of shared memory and writing to that rather than copying the
data to the wire command buffer first, which may involve chunking and
additional copies.

In tests so far this performs up to 2X better than the previous
WriteTexture implementation, depending on data size. (Larger uploads
typically see a bigger improvement.)

Very similar to recent WriteBuffer optimizations proposed by Loko:
https://dawn-review.googlesource.com/c/dawn/+/271535

Bug: 441900745
Change-Id: Ie85e2d38e4db9ad85465640a4f0d65f07c69fa78
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/273396
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Loko Kung <lokokung@google.com>
3 files changed
tree: afcc03d16ff2b8f46393d4c18b1793e7bf253581
  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.