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777654e6b9
Previously the conversion lost precision because of the repeated float additions and rounding of float to uint. It is reworked to operate using only integers, giving a better precision (3e-5 instead of 2e-3) for all periods between 1ns and 2^16ns (which all GPUs seem to fall in to). The QueryHelper test is reworked to test multiple periods to provide better certainty that the maths in the conversion is correct. Bug: dawn:1250 Change-Id: I43703bb3a40c4e362d78126e3bf0d830690bc1d7 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/77780 Reviewed-by: Loko Kung <lokokung@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 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:
- Dawn overview
- Building Dawn
- Contributing to Dawn
- Testing Dawn
- Debugging Dawn
- Dawn's infrastructure
- Dawn errors
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.