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dawn / dawn / d380fdda08d40a864667feb28b96392db26c8a11
commitd380fdda08d40a864667feb28b96392db26c8a11[log] [tgz]
authorStephen White <senorblanco@chromium.org>Thu Oct 04 16:59:05 2018 +0000
committerCommit Bot service account <commit-bot@chromium.org>Thu Oct 04 16:59:05 2018 +0000
tree77fb218915306048c2bd4eed167c2d5aad3f37d8
parentf168c576947b259cf49ca9cb6daaaab96907cb37 [diff]
Fix for D3D12 re-used bindgroup bug.

If a bindgroup was re-used in multiple command buffers in a single call
to queue.Submit(), it was skipping the creation of the corresponding
descriptor heap for that bind group in the second command buffer.

The fix is to use the command buffer's index into the submit command as
part of the key for the bind group's descriptor heap.

Change-Id: Ie66a0e772b10cc72bf040f090dac4c4a10f24266
Reviewed-on: https://dawn-review.googlesource.com/c/1740
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>
7 files changed
tree: 77fb218915306048c2bd4eed167c2d5aad3f37d8
  1. build_overrides/
  2. examples/
  3. generator/
  4. infra/
  5. scripts/
  6. src/
  7. third_party/
  8. .appveyor.yml
  9. .clang-format
  10. .gitignore
  11. .gitmodules
  12. .gn
  13. .travis.yml
  14. AUTHORS
  15. BUILD.gn
  16. CMakeLists.txt
  17. codereview.settings
  18. CONTRIBUTING.md
  19. dawn.json
  20. DEPS
  21. LICENSE
  22. OWNERS
  23. PRESUBMIT.py
  24. README.chromium
  25. README.md
README.md

Dawn, a WebGPU implementation

Dawn (formerly NXT) is an open-source and cross-platform implementation of the work-in-progress WebGPU standard. It exposes a C/C++ API that maps almost one-to-one to the WebGPU IDL and can be managed as part of a larger system such as a Web browser.

Dawn provides several WebGPU building blocks:

  • WebGPU C/C++ headers that applications and other building blocks use.
  • A “native” implementation of WebGPU using platforms' GPU APIs:
    • D3D12 on Windows 10
    • Metal on OSX (and eventually iOS)
    • Vulkan on Windows, Linux (eventually ChromeOS and Android too)
    • OpenGL as best effort where available
  • A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers

Directory structure

  • dawn.json: description of the API used to drive code generators.
  • examples: examples showing how Dawn is used.
  • generator: code generator for files produces from dawn.json
    • templates: Jinja2 templates for the generator
  • scripts: scripts to support things like continuous testing, build files, etc.
  • src:
    • common: helper code shared between core Dawn libraries and tests/samples
    • dawn_native: native implementation of WebGPU, one subfolder per backend
    • dawn_wire: client-server implementation of WebGPU
    • include: public headers for Dawn
    • tests: internal Dawn tests
      • end2end: WebGPU tests performing GPU operations
      • unittests: unittests and by extension tests not using the GPU
        • validation: WebGPU validation tests not using the GPU (frontend tests)
    • utils: helper code to use Dawn used by tests and samples
  • third_party: directory where dependencies live as well as their buildfiles.

Building Dawn

Dawn uses the Chromium build system and dependency management so you need to [install depot_tools] and add it to the PATH. Then get the source as follows:

# Clone the repo as "dawn"
git clone https://github.com/google/nxt-standalone.git dawn && cd dawn

# Bootstrap the gclient configuration
cp scripts/standalone.gclient .gclient

# Fetch external dependencies and toolchains with gclient
gclient sync

Then generate build files using gn args out/Debug or gn args out/Release. A text editor will appear asking build options, the most common option is is_debug=true/false; otherwise gn args out/Release --list shows all the possible options.

Then use ninja -C out/Release to build dawn and for example ./out/Release/dawn_end2end_tests to run the tests.

Contributing

Please read and follow CONTRIBUTING.md. Dawn doesn‘t have a formal coding style yet, except what’s defined by our clang format style. Overall try to use the same style and convention as code around your change.

License

Please see LICENSE.

Disclaimer

This is not an officially supported Google product.