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dawn / dawn / 31f1e527d6865cc02b1ceda203c77cb0da070b79
commit31f1e527d6865cc02b1ceda203c77cb0da070b79[log] [tgz]
authorCorentin Wallez <cwallez@chromium.org>Tue Feb 06 11:17:34 2024 +0000
committerDawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue Feb 06 11:17:34 2024 +0000
tree343d065fe9c4cd9201b3832a8c984defa568de72
parent2c09910818ca1ea4abca925b6a1d4b4804e97c37 [diff]
vulkan: Fix synchronization with acquire swapchain images.

The vkAcquireNextImageKHR method is a read operation in Vulkan which completes
before the semaphore/fence out parameters are signaled. This means that future uses
of the texture must performs a memory barriers that synchronizes with that
semaphore/barrier. Dawn uses the ALL_COMMANDS_BIT stage for the semaphore, however
such a semaphore doesn't synchronize with a subsequent BOTTOM_OF_PIPE or NONE
srcStage vkPipelineBarrier because there are no common stages. Instead we also use
VK_PIPELINE_STAGE_ALL_COMMANDS_BIT for srcStage for presentable images, ensuring
correct ordering.

The kPresentTextureUsage is split in two different usages "Acquire" and
"Release". When acquiring the stage mask is set to ALL_COMMANDS_BIT and
the layout to UNDEFINED (because we will initialize the texture anyway).
When release the stage mask is 0 as noted in the Vulkan spec, but the
layout set to PRESENT_KHR.

Bug: 41497359
Change-Id: I158d3071602ee598e661fca7993865c0881d4f05
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/173463
Reviewed-by: Loko Kung <lokokung@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
6 files changed
tree: 343d065fe9c4cd9201b3832a8c984defa568de72
  1. .github/
  2. .vscode/
  3. build_overrides/
  4. docs/
  5. generator/
  6. include/
  7. infra/
  8. scripts/
  9. src/
  10. test/
  11. third_party/
  12. tools/
  13. webgpu-cts/
  14. build
  15. buildtools
  16. testing
  17. .bazelrc
  18. .clang-format
  19. .clang-tidy
  20. .gitattributes
  21. .gitignore
  22. .gitmodules
  23. .gn
  24. AUTHORS
  25. BUILD.bazel
  26. BUILD.gn
  27. CMakeLists.txt
  28. CMakeSettings.json
  29. CODE_OF_CONDUCT.md
  30. codereview.settings
  31. CONTRIBUTING.md
  32. CPPLINT.cfg
  33. DEPS
  34. DIR_METADATA
  35. go.mod
  36. go.sum
  37. go_presubmit_support.py
  38. LICENSE
  39. OWNERS
  40. PRESUBMIT.py
  41. README.chromium
  42. README.md
  43. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the 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)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.