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dawn / dawn / fe9e9d8c69c02df82bd75f376b8350c337dfa989
commitfe9e9d8c69c02df82bd75f376b8350c337dfa989[log] [tgz]
authorJiawei Shao <jiawei.shao@intel.com>Wed Oct 11 07:57:48 2023 +0000
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Oct 11 07:57:48 2023 +0000
tree9076d00b9f6b7f78aee7f1b3b0c730f1a1169fc3
parent25d4e220a1b2679c6017fccd08e34741dc6be0f0 [diff]
Support larger maxInterStageShader limits on D3D and Vulkan

This patch implements larger maxInterStageShaderVariables and
maxInterStageShaderComponents on D3D11, D3D12 and Vulkan.

On D3D backends the maximum number of maxInterStageShaderVectors
can be (D3D12_PS_INPUT_REGISTER_COUNT - 2 = 30) and the maximum
number of maxInterStageShaderComponents is
(D3D12_PS_INPUT_REGISTER_COUNT - 2) * D3D12_PS_INPUT_REGISTER_COMPONENTS
= 120:
- reserve one register for SV_Position
- reserve one register for SV_SampleIndex OR SV_IsFrontFace

On Vulkan backends we should reserve 4 components for the SPIR-V
builtin position when computing maxInterStageShaderComponents, and
maxInterStageShaderVariables is (maxInterStageShaderComponents / 4).

See the below investigations for more details:
https://github.com/gpuweb/gpuweb/issues/1962

Bug: dawn:685, dawn:1448
Test: dawn_end2end_tests
Change-Id: I91f8461aa6b38ef830e9088eca7ada1c1578f280
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/155343
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
21 files changed
tree: 9076d00b9f6b7f78aee7f1b3b0c730f1a1169fc3
  1. .vscode/
  2. build_overrides/
  3. docs/
  4. generator/
  5. include/
  6. infra/
  7. scripts/
  8. src/
  9. test/
  10. third_party/
  11. tools/
  12. webgpu-cts/
  13. build
  14. buildtools
  15. testing
  16. .bazelrc
  17. .clang-format
  18. .clang-tidy
  19. .gitattributes
  20. .gitignore
  21. .gitmodules
  22. .gn
  23. AUTHORS
  24. BUILD.bazel
  25. BUILD.gn
  26. CMakeLists.txt
  27. CMakeSettings.json
  28. CODE_OF_CONDUCT.md
  29. codereview.settings
  30. CONTRIBUTING.md
  31. CPPLINT.cfg
  32. dawn.json
  33. dawn_wire.json
  34. DEPS
  35. DIR_METADATA
  36. Doxyfile
  37. go.mod
  38. go.sum
  39. go_presubmit_support.py
  40. LICENSE
  41. OWNERS
  42. PRESUBMIT.py
  43. README.chromium
  44. README.md
  45. WORKSPACE.bazel
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, 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:

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.