Add Chromium's StackVector base class and ityp::stack_vec

In order to lift Dawn's restriction on the number of bindings
per bind group, static sized arays need to be converted to
dynamically sized vectors. This CL adds Chromium's StackVector
class which behaves like std::vector but provides a stack allocator
to allocate small vectors on the stack. Dawn can use this to avoid
making separate heap allocations for a smaller, realistic binding

The CL also adds an ityp::stack_vec class to support using
a StackVector with TypedInteger indices.

Bug: dawn:442, dawn:443
Change-Id: I7604c02b3ea52cd63990a2e8b45ed238a5d52232
Reviewed-by: Corentin Wallez <>
Reviewed-by: Bryan Bernhart <>
Reviewed-by: Austin Eng <>
Commit-Queue: Austin Eng <>
7 files changed
tree: 0b1cba7bc728035331fa542ebfefb7d6c8123c24
  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.