metal: Specify storage binding usage for IOSurface textures explicitly

Add a allowStorageBinding flag on SharedTextureMemoryIOSurfaceDescriptor
which specifies whether TextureUsage::StorageBinding is allowed and if
MTLTextureUsageShaderWrite is set on the IOSurface wrapping MTLTexture.
The flag defaults to true to match current behavior, but we will change
it to false once Chromium migrates to using the flag. Chromium will set
the flag based on whether SHARED_IMAGE_USAGE_WEBGPU_STORAGE_TEXTURE
usage is set on the IOSurfaceImageBacking.

Bug: 388872587
Change-Id: I8cd78711cf8600b77a3d14b58eaa6d026afe83d1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/223216
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Sunny Sachanandani <sunnyps@chromium.org>
5 files changed
tree: 4d31f51caadee2828a056009b7f315e76aedb24e
  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. .bazelrc
  15. .clang-format
  16. .clang-tidy
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. AUTHORS
  23. BUILD.bazel
  24. BUILD.gn
  25. CMakeLists.txt
  26. CMakeSettings.json
  27. CODE_OF_CONDUCT.md
  28. codereview.settings
  29. CONTRIBUTING.md
  30. CPPLINT.cfg
  31. DEPS
  32. DIR_METADATA
  33. go.mod
  34. go.sum
  35. go_presubmit_support.py
  36. LICENSE
  37. OWNERS
  38. PRESUBMIT.py
  39. README.chromium
  40. README.md
  41. WATCHLISTS
  42. 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.