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chromium / angle / angle / refs/heads/chromium/3012
commitb1eeba1f20199497a4951e9e791dbcc862399ca4[log] [tgz]
authorJamie Madill <jmadill@chromium.org>Mon Feb 13 21:36:40 2017
committerCommit Bot <commit-bot@chromium.org>Mon Feb 13 23:12:23 2017
tree1314d44096dcc2c6ce18971aca5b96647fcac723
parentc47e3407f7c14bb33c0b6436275bca8baaf9e544 [diff]
Use a C API for the ANGLE platform.

The main purpose of this change is to fix a fuzzer bug where we would
trigger undefined behaviour calling between Chrome and ANGLE. It's
not specced how virtual function calls work if the shared objects are
not directly linked together, and ANGLE and Chrome are not linked.
Replace the old class-style API with a C dispatch table.

Follow-up work will make the Platform owned by the Display instead of
using global variables, but fixing this is a bit tricky.

BUG=angleproject:1892
BUG=chromium:678870

Change-Id: Iad188bc2e50f2b5e4a03ce0de233d686f569c705
Reviewed-on: https://chromium-review.googlesource.com/441273
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
10 files changed
tree: 1314d44096dcc2c6ce18971aca5b96647fcac723
  1. doc/
  2. extensions/
  3. gni/
  4. gyp/
  5. include/
  6. infra/
  7. samples/
  8. scripts/
  9. src/
  10. third_party/
  11. util/
  12. .clang-format
  13. .gitattributes
  14. .gitignore
  15. AUTHORS
  16. BUILD.gn
  17. codereview.settings
  18. CONTRIBUTORS
  19. DEPS
  20. DEPS.chromium
  21. LICENSE
  22. README.chromium
  23. 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
Linuxcompleteplanned
Mac OS Xin progress
Chrome OScompleteplanned
Androidcompleteplanned

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. For generating a Windows Store version of ANGLE view the Windows Store instructions

Contributing