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This is required to make importing images work on some systems. The ideal version would be detecting whether dedicated allocations are needed as Vulkan provides reflection for that. However this reflection doesn't work on Nvidia, so instead Dawn requires a NeedsDedicatedAllocation enum on import that's Yes/No/Detect so the application can force use of a specific code path. Support for this enum and toggling dedicated allocations on/off is added for all external memory service implementations. Vulkan image wrapping tests are modified to add test parameters so that the Yes/No/Detect code paths are covered by tests. This is technically post-V1 work, but gl_tests in Chromium fail on Nvidia workstations without this fix, which makes it hard to debug other issues. Bug: dawn:1552, dawn:206, dawn:1260 Change-Id: Iee4f7bb9dbec520432ec623551221ef9e4d3d984 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/103560 Reviewed-by: Austin Eng <enga@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Dawn, a WebGPU implementation
Dawn is an open-source and cross-platform implementation of the work-in-progress 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.hversion that Dawn implements. - A C++ wrapper for the
webgpu.h.
- The
- 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:
- Dawn bug tracker if you find issues with Dawn.
- Tint bug tracker if you find issues with Tint.
- Dawn's mailing list for other discussions related to Dawn.
- Dawn's source code
- Dawn's Matrix chatroom for live discussion around contributing or using Dawn.
- WebGPU's Matrix chatroom
- Tint mirror for standalone usage.
Documentation table of content
Developer documentation:
- Dawn overview
- Building
- Contributing
- Code of Conduct
- Testing Dawn
- Debugging Dawn
- Dawn's infrastructure
- Dawn errors
- Tint experimental extensions
User documentation: (TODO, figure out what overlaps with the webgpu.h docs)
Status
(TODO)
License
Apache 2.0 Public License, please see LICENSE.
Disclaimer
This is not an officially supported Google product.