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dawn / dawn / af5d1865b7219e27672c2cd2ee21f73911aa7214
commitaf5d1865b7219e27672c2cd2ee21f73911aa7214[log] [tgz]
authorCorentin Wallez <cwallez@chromium.org>Wed Feb 27 10:09:46 2019 +0000
committerCommit Bot service account <commit-bot@chromium.org>Wed Feb 27 10:09:46 2019 +0000
tree61424f2fc1e4011982971babd9545a4d1270b472
parent9c061c3437d0be2d94ce4430497edf36dfb8b74c [diff]
DawnTest: Use last adapter on Metal

This is a temporary workaround to make sure we test the correct adapter
on the macOS builders: on multi-GPU systems the integrated is always
listed first so we would previously only test on Intel.

However we can't change the logic for D3D12 becaue the correct adapter
is the first one.

The proper fix for this is to pass the requested PCI device and vendor
ID to dawn_end2end_tests so it can select the correct adapter, but this
requires PCI IDs to be correct with Metal, which requires rolling the
macOS 10.13 SDK in Chromium.

BUG=dawn:109

Change-Id: Ice33367b0b8850306785b10a2dafc2f68d8b84d7
Reviewed-on: https://dawn-review.googlesource.com/c/5041
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
1 file changed
tree: 61424f2fc1e4011982971babd9545a4d1270b472
  1. build_overrides/
  2. docs/
  3. examples/
  4. generator/
  5. infra/
  6. scripts/
  7. src/
  8. third_party/
  9. .clang-format
  10. .gitignore
  11. .gn
  12. AUTHORS
  13. BUILD.gn
  14. codereview.settings
  15. CONTRIBUTING.md
  16. dawn.json
  17. dawn_wire.json
  18. DEPS
  19. LICENSE
  20. OWNERS
  21. PRESUBMIT.py
  22. README.chromium
  23. 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.

On Linux you need to have the pkg-config command:

# Install pkg-config on Ubuntu
sudo apt-get install pkg-config

Then get the source as follows:

# Clone the repo as "dawn"
git clone https://dawn.googlesource.com/dawn 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.

If you find issues with Dawn, please feel free to report them on the bug tracker. For other discussions, please post to Dawn's mailing list.

License

Please see LICENSE.

Disclaimer

This is not an officially supported Google product.