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chromium / angle / angle.git / a1665d2fc335ef1481c76d4066cb2e22bab83ba7
commita1665d2fc335ef1481c76d4066cb2e22bab83ba7[log] [tgz]
authorShahbaz Youssefi <syoussefi@chromium.org>Fri May 10 04:15:31 2024
committerAngle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue May 14 03:59:10 2024
tree47d614a76bfd09b316f0570bf9fa5e7508bc4979
parentdf2e7bd7c99e27868947f887355ad11979f6d492 [diff]
Reland "Document thread-unsafe iterator access to resource maps"

This is a reland of commit d1bb6ed8399dd12e79484f30f9e9ded95c25625a

The crash was due to another issue (disabling EGL validation in
Chrome)

Original change's description:
> Document thread-unsafe iterator access to resource maps
>
> By using a proxy type, everywhere resource maps are iterated are clearly
> marked as not being thread safe.  In most cases, only destruction and
> capture/replay iterate over these maps, which means thread safety is not
> an issue (or is externally enforced).
>
> The only case where iterators are used in the presence of other contexts
> is with ANGLE_request_extension, which is changed to explicitly require
> the application to ensure thread safety.  In practice, the user is
> Chrome which already guarantees this.
>
> Bug: angleproject:8667
> Change-Id: I7af13c6433b6955d9c36f9088b3aa4c065e1cfc1
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5526428
> Reviewed-by: Charlie Lao <cclao@google.com>
> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
> Reviewed-by: Geoff Lang <geofflang@chromium.org>

Bug: angleproject:8667
Change-Id: Id539cabac01df5f242150f6684222577003eef3f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5531278
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
8 files changed
tree: 47d614a76bfd09b316f0570bf9fa5e7508bc4979
  1. android/
  2. build_overrides/
  3. doc/
  4. extensions/
  5. gni/
  6. include/
  7. infra/
  8. samples/
  9. scripts/
  10. src/
  11. third_party/
  12. tools/
  13. util/
  14. build
  15. buildtools
  16. testing
  17. .clang-format
  18. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. .style.yapf
  23. .vpython
  24. .vpython3
  25. .yapfignore
  26. additional_readme_paths.json
  27. Android.mk
  28. AUTHORS
  29. BUILD.gn
  30. codereview.settings
  31. CONTRIBUTORS
  32. DEPS
  33. DIR_METADATA
  34. dotfile_settings.gni
  35. LICENSE
  36. OWNERS
  37. PRESUBMIT.py
  38. README.chromium
  39. README.md
  40. WATCHLISTS
README.md

ANGLE - Almost Native Graphics Layer Engine

The goal of ANGLE is to allow users of multiple operating systems to seamlessly run WebGL and other OpenGL ES content by translating OpenGL ES API calls to one of the hardware-supported APIs available for that platform. ANGLE currently provides translation from OpenGL ES 2.0, 3.0 and 3.1 to Vulkan, desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Future plans include ES 3.2, translation to Metal and MacOS, Chrome OS, and Fuchsia support.

Level of OpenGL ES support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
OpenGL ES 2.0completecompletecompletecompletecompletecomplete
OpenGL ES 3.0completecompletecompletecompletecomplete
OpenGL ES 3.1incompletecompletecompletecomplete
OpenGL ES 3.2in progressin progresscomplete

Additionally, OpenGL ES 1.1 is implemented in the front-end using OpenGL ES 3.0 features. This version of the specification is thus supported on all platforms specified above that support OpenGL ES 3.0 with known issues.

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
Windowscompletecompletecompletecompletecomplete
Linuxcompletecomplete
Mac OS Xcompletecomplete [1]
iOScomplete [2]
Chrome OScompleteplanned
Androidcompletecomplete
GGP (Stadia)complete
Fuchsiacomplete

[1] Metal is supported on macOS 10.14+

[2] Metal is supported on iOS 12+

ANGLE v1.0.772 was certified compliant by passing the OpenGL ES 2.0.3 conformance tests in October 2011.

ANGLE has received the following certifications with the Vulkan backend:

  • OpenGL ES 2.0: ANGLE 2.1.0.d46e2fb1e341 (Nov, 2019)
  • OpenGL ES 3.0: ANGLE 2.1.0.f18ff947360d (Feb, 2020)
  • OpenGL ES 3.1: ANGLE 2.1.0.f5dace0f1e57 (Jul, 2020)
  • OpenGL ES 3.2: ANGLE 2.1.2.21688.59f158c1695f (Sept, 2023)

ANGLE also provides an implementation of the EGL 1.5 specification.

ANGLE is used as the default WebGL backend for both Google Chrome and Mozilla Firefox on Windows platforms. Chrome uses ANGLE for all graphics rendering on Windows, including the accelerated Canvas2D implementation and the Native Client sandbox environment.

Portions of the ANGLE shader compiler are used as a shader validator and translator by WebGL implementations across multiple platforms. It is used on Mac OS X, Linux, and in mobile variants of the browsers. Having one shader validator helps to ensure that a consistent set of GLSL ES shaders are accepted across browsers and platforms. The shader translator can be used to translate shaders to other shading languages, and to optionally apply shader modifications to work around bugs or quirks in the native graphics drivers. The translator targets Desktop GLSL, Vulkan GLSL, Direct3D HLSL, and even ESSL for native GLES2 platforms.

Sources

ANGLE repository is hosted by Chromium project and can be browsed online or cloned with

git clone https://chromium.googlesource.com/angle/angle

Building

View the Dev setup instructions.

Contributing