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dawn / dawn / 10a45acffb5b08f4d5dab406bdfbf60c7518d289
commit10a45acffb5b08f4d5dab406bdfbf60c7518d289[log] [tgz]
authordan sinclair <dsinclair@chromium.org>Thu Jun 05 10:07:45 2025 -0700
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Jun 05 10:07:45 2025 -0700
tree18d5721ca6958f3d365e0be816490b79f135826d
parent44af62c9d1ae2f6277ba1f5bc84198cce16374e3 [diff]
[spirv-reader][ir] Make sure `position` is used.

In SPIR-V, it's possible to create a `position` var, set it into the
`OpEntryPoint` interface, and then never store to `position`. This will
produce undefined values into the position.

In IR, we _must_ reference the `position` in order for it to be
considered part of the interface for the vertex shader. So, if we detect
that `position` is setup in `OpEntryPoint`, but never referenced, we'll
inject a store of `(0, 0, 0, 0)` into the `position` variable to satisfy
the interface rules.

Bug: 42250952
Change-Id: Ic37a4d6e34842bfd305dca22380df7527c469bed
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/245615
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Auto-Submit: dan sinclair <dsinclair@chromium.org>
3 files changed
tree: 18d5721ca6958f3d365e0be816490b79f135826d
  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. WATCHLISTS
  48. 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.