Support *-srgb format as dst formats in CopyTextureForBrowser

Dawn allows texture-to-texture copy happens between the textures that
formats only have diff on srgb-ness.

CopyTextureForBrowser could align on this rule to achieve copying to
*-srgb dst texture and keep the bytes the same as copying to non-srgb

This CL add support for *-srgb textures as dst textures and using an
extra gamma decoding step for this.

Bug: dawn:1195
Change-Id: I665dbca473aa84b9d87b7a35c4f90ce1897ade7b
Reviewed-by: Corentin Wallez <>
Reviewed-by: Kai Ninomiya <>
Commit-Queue: Shaobo Yan <>
2 files changed
tree: f38968cea06505a075aa4c6702590a7817624e19
  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's logo: a sun rising behind a stylized mountain inspired by the WebGPU logo. The text Dawn is written below it.

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.