Implement 3D Texture copy for partial depth slices on D3D12

Note that a slice somehow means a subresource on D3D12. There
are mip slice, array slice, and plane/aspect slice in D3D12.
We reuse the term "slice" for multiple depth of a 3D texture,
although one single depth slice of multiple depth slices is
not a separate subresource of a 3D texture (all these depth
slices for one mip are a separte subresource in 3D texture).

For the reason above, this change also renames "slice" to
"layer" in some functions if "slice" is a layer in that
function. Because a layer is definitely a subresource but a
slice may not be (like a single depth slice of a 3D texture).

Bug: dawn:547
Change-Id: I88b8120ef7f73bfc261fc225f4242924da221654
Reviewed-by: Corentin Wallez <>
Reviewed-by: Austin Eng <>
Commit-Queue: Yunchao He <>
4 files changed
tree: 979ea2ba950b3498f154aa17fce020f8124b548f
  1. .vscode/
  2. build_overrides/
  3. docs/
  4. examples/
  5. generator/
  6. infra/
  7. scripts/
  8. src/
  9. third_party/
  10. tools/
  11. .clang-format
  12. .gitattributes
  13. .gitignore
  14. .gn
  17. CMakeLists.txt
  18. codereview.settings
  19. dawn.json
  20. dawn_wire.json
  21. DEPS
  24. OWNERS
  26. README.chromium

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 the webgpu.h docs)




Apache 2.0 Public License, please see LICENSE.


This is not an officially supported Google product.