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dawn / dawn / 663a16e2fe4129ffe305e22d6fb62f6106ee2924
commit663a16e2fe4129ffe305e22d6fb62f6106ee2924[log] [tgz]
authorMichael Tang <tangm@microsoft.com>Thu Aug 19 17:17:26 2021 +0000
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Aug 19 17:17:26 2021 +0000
treeaf18643019efb56a4f282073c6044812ac0b15aa
parent05b770ae86177f40c7119fe9e7b6034e04dae8df [diff]
D3D12: use the WGSL binding number as shader register

Currently, the bind group layout tightly packs the shader registers for
each of the sampler and non-sampler descriptors sets. This reduces the
max shader register used and helps targeting shader model 5.0, which has
a relatively low max slot count per resource. It is safe in D3D, since a
shader register collision can be valid if the descriptor types differ.

To support Mesa's SPIR-V to DXIL compiler, we need to avoid possible
collisions between resources' shader registers because it uses SPIR-V as
an intermediate representation (which does not namespace bindings by
type). This change re-works BindGroupLayoutD3D12 to not assume the
resulting shader registers will be tightly packed and group per
descriptor type.

Change-Id: I0bb51106c4683bfe02ce15ecad71716734b7a91f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/60764
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Michael Tang <tangm@microsoft.com>
6 files changed
tree: af18643019efb56a4f282073c6044812ac0b15aa
  1. .vscode/
  2. build_overrides/
  3. docs/
  4. examples/
  5. generator/
  6. infra/
  7. scripts/
  8. src/
  9. third_party/
  10. tools/
  11. .clang-format
  12. .gitattributes
  13. .gitignore
  14. .gn
  15. AUTHORS
  16. BUILD.gn
  17. CMakeLists.txt
  18. codereview.settings
  19. dawn.json
  20. dawn_wire.json
  21. DEPS
  22. DIR_METADATA
  23. LICENSE
  24. OWNERS
  25. PRESUBMIT.py
  26. README.chromium
  27. README.md
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.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.