1# ANGLE - Almost Native Graphics Layer Engine 2 3The goal of ANGLE is to allow users of multiple operating systems to seamlessly run WebGL and other 4OpenGL ES content by translating OpenGL ES API calls to one of the hardware-supported APIs available 5for that platform. ANGLE currently provides translation from OpenGL ES 2.0 and 3.0 to desktop 6OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Support for translation from OpenGL ES to Vulkan is 7underway, and future plans include compute shader support (ES 3.1) and MacOS support. 8 9### Level of OpenGL ES support via backing renderers 10 11| | Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | 12|----------------|:-------------:|:----------------:|:--------------:|:-------------:|:-------------:| 13| OpenGL ES 2.0 | complete | complete | complete | complete | complete | 14| OpenGL ES 3.0 | | complete | complete | complete | in progress | 15| OpenGL ES 3.1 | | in progress | complete | complete | not started | 16| OpenGL ES 3.2 | | | planned | planned | planned | 17 18### Platform support via backing renderers 19 20| | Direct3D 9 | Direct3D 11 | Desktop GL | GL ES | Vulkan | 21|------------:|:--------------:|:--------------:|:-------------:|:-----------:|:-----------:| 22| Windows | complete | complete | complete | complete | complete | 23| Linux | | | complete | | complete | 24| Mac OS X | | | complete | | | 25| Chrome OS | | | | complete | planned | 26| Android | | | | complete | complete | 27| Fuchsia | | | | | in progress | 28 29ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. 30ANGLE also provides an implementation of the EGL 1.4 specification. 31 32ANGLE is used as the default WebGL backend for both Google Chrome and Mozilla Firefox on Windows 33platforms. Chrome uses ANGLE for all graphics rendering on Windows, including the accelerated 34Canvas2D implementation and the Native Client sandbox environment. 35 36Portions of the ANGLE shader compiler are used as a shader validator and translator by WebGL 37implementations across multiple platforms. It is used on Mac OS X, Linux, and in mobile variants of 38the browsers. Having one shader validator helps to ensure that a consistent set of GLSL ES shaders 39are accepted across browsers and platforms. The shader translator can be used to translate shaders 40to other shading languages, and to optionally apply shader modifications to work around bugs or 41quirks in the native graphics drivers. The translator targets Desktop GLSL, Direct3D HLSL, and even 42ESSL for native GLES2 platforms. 43 44## Sources 45 46ANGLE repository is hosted by Chromium project and can be 47[browsed online](https://chromium.googlesource.com/angle/angle) or cloned with 48 49 git clone https://chromium.googlesource.com/angle/angle 50 51 52## Building 53 54View the [Dev setup instructions](doc/DevSetup.md). 55 56## Contributing 57 58* Join our [Google group](https://groups.google.com/group/angleproject) to keep up to date. 59* Join us on IRC in the #ANGLEproject channel on FreeNode. 60* Join us on [Slack](https://chromium.slack.com) in the #angle channel. 61* [File bugs](http://anglebug.com/new) in the [issue tracker](https://bugs.chromium.org/p/angleproject/issues/list) (preferably with an isolated test-case). 62* [Choose an ANGLE branch](doc/ChoosingANGLEBranch.md) to track in your own project. 63 64 65* Read ANGLE development [documentation](doc). 66* Look at [pending](https://chromium-review.googlesource.com/q/project:angle/angle+status:open) 67 and [merged](https://chromium-review.googlesource.com/q/project:angle/angle+status:merged) changes. 68* Become a [code contributor](doc/ContributingCode.md). 69* Use ANGLE's [coding standard](doc/CodingStandard.md). 70* Learn how to [build ANGLE for Chromium development](doc/BuildingAngleForChromiumDevelopment.md). 71* Get help on [debugging ANGLE](doc/DebuggingTips.md). 72* Go through [ANGLE's orientation](doc/Orientation.md) and sift through [starter projects](doc/Starter-Projects.md). 73 74 75* Read about WebGL on the [Khronos WebGL Wiki](http://khronos.org/webgl/wiki/Main_Page). 76* Learn about implementation details in the [OpenGL Insights chapter on ANGLE](http://www.seas.upenn.edu/~pcozzi/OpenGLInsights/OpenGLInsights-ANGLE.pdf) and this [ANGLE presentation](https://drive.google.com/file/d/0Bw29oYeC09QbbHoxNE5EUFh0RGs/view?usp=sharing). 77* Learn about the past, present, and future of the ANGLE implementation in [this presentation](https://docs.google.com/presentation/d/1CucIsdGVDmdTWRUbg68IxLE5jXwCb2y1E9YVhQo0thg/pub?start=false&loop=false). 78* Watch a [short presentation](https://youtu.be/QrIKdjmpmaA) on the Vulkan back-end. 79* Track the [dEQP test conformance](doc/dEQP-Charts.md) 80* If you use ANGLE in your own project, we'd love to hear about it! 81