Reland "Support depth32float sampling on D3D12"

This is a reland of 071fe56ffe734ac04ebdfe168b27a59917f20490

It creates textures as TYPELESS if they may need reinterpretation
of the bit layout. Right now only sampled Depth32Float needs this
so it is special-cased.

Original change's description:
> Support depth32float sampling on D3D12
> Bug: dawn:367
> Change-Id: I026e718130cbd92427c6292045fd041c878d4f77
> Reviewed-on:
> Commit-Queue: Austin Eng <>
> Reviewed-by: Stephen White <>

Bug: dawn:367
Change-Id: I8b0ad465915c4476099fc1097e0cd02b23bd21b6
Reviewed-by: Corentin Wallez <>
Reviewed-by: Rafael Cintron <>
Reviewed-by: Austin Eng <>
Commit-Queue: Austin Eng <>
3 files changed
tree: 8f5abd80ad2cc3c8786a6f3aab0c9c3d6efcbefe
  1. .clang-format
  2. .gitattributes
  3. .gitignore
  4. .gn
  7. CMakeLists.txt
  9. DEPS
  11. OWNERS
  13. README.chromium
  15. build_overrides/
  16. codereview.settings
  17. dawn.json
  18. dawn_wire.json
  19. docs/
  20. examples/
  21. generator/
  22. infra/
  23. scripts/
  24. src/
  25. third_party/
  26. tools/

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 webgpu.h docs)




Apache 2.0 Public License, please see LICENSE.


This is not an officially supported Google product.