CMake-only fork of https://dawn.googlesource.com/dawn with cleaned, vendored dependencies
e4f947637a
This patch replaces D3D12_BLEND_DEST_ALPHA with D3D12_BLEND_ONE when the color target formats have no alpha-channel. Using D3D12_BLEND_ONE is an optimization over D3D12_BLEND_DEST_ALPHA as it means the GPU hardware doesn't need to get destination pixel at all. As D3D SPED requires the default value for missing components in an element format is "0" for any component except A, which gets "1", using D3D12_BLEND_DEST_ALPHA takes same effect with D3D12_BLEND_ONE when the color target formats have no alpha channel. In addition, replacing D3D12_BLEND_DEST_ALPHA with D3D12_BLEND_ONE also serves as a workaround against an Intel driver issue about alpha blending. Bug: dawn:1579 Change-Id: If79e4c8007b68dd35e142ba9cf8a4921e611890a Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/120120 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com> Reviewed-by: Austin Eng <enga@chromium.org> |
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README.md
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.