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dawn/dawn/ee97f6ef913806678d8cae0bdb090ce09ab60b07
commit
ee97f6ef913806678d8cae0bdb090ce09ab60b07
[log]
author
Kim Brandwijk <kim.brandwijk@gmail.com>
Wed Mar 25 15:33:29 2026 -0700
committer
Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Wed Mar 25 15:33:29 2026 -0700
tree
f5d8a61260bbf506fbe05b8259761f89b7aab6de
parent
91ade3aaeaa44b7e3ae6d12dca014856536142bc [diff]
metal: Map iOS depth/disparity IOSurface formats in SharedTextureMemory

Add CVPixelFormatType mappings for DepthFloat16, DepthFloat32,
DisparityFloat16, and DisparityFloat32 to R16Float/R32Float in
GetFormatEquivalentToIOSurfaceFormat().

These formats are produced by AVCaptureDepthDataOutput on iOS devices
with LiDAR (iPhone 12 Pro and later). The IOSurface memory layout is
identical to the already-mapped OneComponent16Half and
OneComponent32Float formats — only the FourCC pixel format tag differs.

This enables zero-copy GPU access to LiDAR depth/disparity data via
SharedTextureMemory IOSurface import without CPU readback.

Bug: 493339350
Change-Id: I44babe5b2d62a9baeb4a5314d0654c0d096863bc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/297995
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Reviewed-by: Shrek Shao <shrekshao@google.com>
3 files changed
tree: f5d8a61260bbf506fbe05b8259761f89b7aab6de
  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-format-ignore
  20. .clang-tidy
  21. .git-blame-ignore-revs
  22. .gitattributes
  23. .gitignore
  24. .gitmodules
  25. .gn
  26. .style.yapf
  27. .vpython3
  28. AUTHORS
  29. BUILD.bazel
  30. BUILD.gn
  31. CMakeLists.txt
  32. CMakeSettings.json
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. CONTRIBUTING.md
  36. CPPLINT.cfg
  37. DEPS
  38. DIR_METADATA
  39. go.mod
  40. go.sum
  41. go_presubmit_support.py
  42. LICENSE
  43. OWNERS
  44. PRESUBMIT.py
  45. README.chromium
  46. README.md
  47. unsafe_buffers_paths.txt
  48. WATCHLISTS
  49. 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.