Google Git
Sign in
android / platform / external / angle / a1442ecdf5
commita1442ecdf5142b40cab85caf9f472b6bece9bf5f[log] [tgz]
authorShahbaz Youssefi <syoussefi@chromium.org>Mon Nov 26 12:48:10 2018 -0500
committerCommit Bot <commit-bot@chromium.org>Thu Nov 29 11:46:17 2018 +0000
tree91e70f86cc72590751702063cd4e5d0bc18ac120
parent5f01324fb627a502823d9e359d243c3430920258 [diff]
Vulkan: Uber-shader support

For each internal shader, there is now possibly a companion .json file
that defines shader variations.  The variations consist of a set of
flags and a set of enums.  Each enum defines a variation that takes one
of a few values.  Flags are shorthands for 2-value enums.

In the shader code, #if can be used to change the shader based on
variations derived from flags and enums.  On the C++ side, those
variations are combined into an index and the appropriate shader is
retrieved from a table.

Bug: angleproject:2958
Change-Id: Ic4fc7061adb20c047c26624305285e3005092aab
Reviewed-on: https://chromium-review.googlesource.com/c/1351117
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
13 files changed
tree: 91e70f86cc72590751702063cd4e5d0bc18ac120
  1. build_overrides/
  2. doc/
  3. extensions/
  4. gni/
  5. include/
  6. infra/
  7. samples/
  8. scripts/
  9. src/
  10. third_party/
  11. tools/
  12. util/
  13. .clang-format
  14. .gitattributes
  15. .gitignore
  16. .gn
  17. additional_readme_paths.json
  18. AndroidManifest.xml
  19. AUTHORS
  20. BUILD.gn
  21. codereview.settings
  22. CONTRIBUTORS
  23. DEPS
  24. dotfile_settings.gni
  25. LICENSE
  26. OWNERS
  27. README.chromium
  28. README.md
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 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 9Direct3D 11Desktop GLGL ESVulkan
OpenGL ES 2.0completecompletecompletecompletein progress
OpenGL ES 3.0completecompletein progressnot started
OpenGL ES 3.1not startedin progressin progressnot started

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkan
Windowscompletecompletecompletecompletein progress
Linuxcompletein progress
Mac OS Xin progress
Chrome OScompleteplanned
Androidcompletein progress

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

Building

View the Dev setup instructions.

Contributing