CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
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Corentin Wallez 777654e6b9 QueryHelper: improve the precision of the tick->ns conversion.
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>
2022-02-01 12:05:22 +00:00
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README.md

Dawn's logo: a sun rising behind a stylized mountain inspired by the WebGPU logo. The text "Dawn" is written below it.

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.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • 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:

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.