author Aki Sasaki <>
Thu, 15 Feb 2018 18:14:26 -0800
changeset 405423 42a3b4c113542cee47b388879e27163091eed356
parent 313120 53735145cfbeede7164416318becd8e33dca53c9
permissions -rw-r--r--
bug 1438735 - balrog scriptworker push and schedule support. r=bhearsum - add balrog submit-toplevel - this replaces the final portion of the updates builder. - rename balrog transform to balrog_submit, because it's for balrog locale submission - make this default to the 'promote' phase. balrog and beetmover currently take the current phase, which isn't always the wanted behavior. - rename balrog publish to balrog schedule - add balrog secondary push and secondary scheduling, for RCs - remove the release_updates transforms - make the balrog transforms smarter - get rid of the release_balrog_publishing transforms; ad a generic worker_type transform - add BALROG_ACTIONS to - add get_balrog_action_scope() - remove the unused balrog channel scopes MozReview-Commit-ID: 369ACiOAd5F

# 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 and 3.0 to desktop
OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Support for translation from OpenGL ES to Vulkan is
underway, and future plans include compute shader support (ES 3.1) and MacOS support.

### Level of OpenGL ES support via backing renderers

|                |  Direct3D 9   |  Direct3D 11     |   Desktop GL   |    GL ES      |    Vulkan     |
| OpenGL ES 2.0  |    complete   |    complete      |    complete    |   complete    |  in progress  |
| OpenGL ES 3.0  |               |    complete      |    complete    |  in progress  |  not started  |
| OpenGL ES 3.1  |               |   not started    |   in progress  |  in progress  |  not started  |

### Platform support via backing renderers

|             |    Direct3D 9  |   Direct3D 11  |   Desktop GL  |    GL ES    |   Vulkan    |
| Windows     |    complete    |    complete    |   complete    |   complete  | in progress |
| Linux       |                |                |   complete    |             |   planned   |
| Mac OS X    |                |                |   in progress |             |             |
| Chrome OS   |                |                |               |   complete  |   planned   |
| Android     |                |                |               |   complete  |   planned   |

ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011.
ANGLE also provides an implementation of the EGL 1.4 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, 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

## Building

View the [Dev setup instructions](doc/ For generating a Windows Store version of ANGLE view the [Windows Store instructions](doc/

## Contributing

* Join our [Google group]( to keep up to date.
* Join us on IRC in the #ANGLEproject channel on FreeNode.
* File bugs in the [issue tracker]( (preferably with an isolated test-case).
* [Choose an ANGLE branch](doc/ to track in your own project.

* Read ANGLE development [documentation](doc).
* Look at [pending](
  and [merged]( changes.
* Become a [code contributor](doc/
* Use ANGLE's [coding standard](doc/
* Learn how to [build ANGLE for Chromium development](doc/
* Get help on [debugging ANGLE](doc/

* Read about WebGL on the [Khronos WebGL Wiki](
* Learn about implementation details in the [OpenGL Insights chapter on ANGLE]( and this [ANGLE presentation](
* Learn about the past, present, and future of the ANGLE implementation in [this recent presentation](
* If you use ANGLE in your own project, we'd love to hear about it!