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dawn / dawn.git / 6aa8aae9c2564d8bb73cb4da9fec0da86ccc8714
commit6aa8aae9c2564d8bb73cb4da9fec0da86ccc8714[log] [tgz]
authorGregg Tavares <gman@chromium.org>Thu Jan 22 08:22:26 2026 -0800
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Jan 22 08:22:26 2026 -0800
treebbeb7526f833bcb791301b4cc63f2eec17e7f9d1
parentb6a3a7e82c4e91c5ac9aeae3e754edf513b5e491 [diff]
Capture: Handle unmap by dirty flag.

We can't capture on Unmap if the buffer is new
(mappedOnCreation) because calling CaptureUnmappedBuffer
will end up calling AddResource which will try to capture
the buffer's contents. We can't capture the buffer's
contents because it's currently mapped.

Instead, mark the buffer as "needs capture" and
capture it again later if it's used.

Bug: 477349135
Change-Id: I6a6a696466378f70100cdb8973761f00d974f5e3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/285935
Reviewed-by: Shrek Shao <shrekshao@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Gregg Tavares <gman@chromium.org>
7 files changed
tree: bbeb7526f833bcb791301b4cc63f2eec17e7f9d1
  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. test_spec_presubmit_support.py
  48. unsafe_buffers_paths.txt
  49. WATCHLISTS
  50. 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.