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In timestamp compute shader, we will create an internal buffer for resolving QuerySet and use it as input buffer in compute shader, the user-provided resolve buffer is used as output buffer. This will cause the buffer zero initialization to be called twice, one is the internal buffer is zero initialized in ResolveQuerySet, antoher is the user-provided buffer is tracked as pass resource and need to be initialized. But for ResolveQuerySet(), we expect there is only once. We have no special requirements to have an internal buffer. It is possible to directly use the user-provided buffer for read and write becuase it will get STORAGE_INTERNAL usage. Bug: dawn:434 Change-Id: Ia8c8ac6e9ba23fea31468a6d9b4580eece189be2 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/36201 Commit-Queue: Hao Li <hao.x.li@intel.com> Reviewed-by: 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 on Windows 10
- Metal on macOS and iOS
- Vulkan on Windows, Linux, ChromeOS, Android and Fuchsia
- OpenGL as best effort where available
- A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
Helpful links:
- Dawn's bug tracker if you find issues with Dawn.
- 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
Documentation table of content
Developer documentation:
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.