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48183b8f58
Vulkan requires that linear and opaque resources be placed in different "pages" of bufferImageGranularity size, as some hardware uses the page table to contain some compression bits or other stuff. Make Dawn honor this limit by aligning all allocations to bufferImageGranularity. This is pretty bad and should be improved later. Also does some cleanups: - Add kMappableBufferUsage to represent all mappable usages. - Remove the proxy function for resource management from vulkan::Device and call ResourceMemoryAllocator directly. - Use an enum to make the difference between mappable, linear and opaque resources. This issue was found while doing a change of the memory type selection in Vulkan, that started failing some unrelated tests on Nvidia. Without knowing the details of the HW or the driver it is really hard to write tests, except by copy-pasting a failing test. This is why there is no test added in this CL, and instead will rely on tests not failing with the follow-up CL. Bug: dawn:659 Change-Id: Ib7c1f3f1949457e04ca8e23d212dc60af7046213 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/52920 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Austin Eng <enga@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.