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gerrit-public.fairphone.software / platform / external / angle / e794cd86d4e6d0a87f941c1f793ff038b7c3334c
commite794cd86d4e6d0a87f941c1f793ff038b7c3334c[log] [tgz]
authorJamie Madill <jmadill@chromium.org>Fri Jan 13 17:29:51 2017 -0500
committerCommit Bot <commit-bot@chromium.org>Mon Jan 30 18:53:01 2017 +0000
treec3c96d6c2371c56364a314978b1d8f5920b5b134
parent61bd9fe145af97dff38bca07c2f51fd6be0d21d6 [diff]
Vulkan: Implement new GLSL translator back-end.

The Vulkan GLSL translator back-end will handle validating and
translating our WebGL/ESSL shaders into Vulkan-specific GLSL.

glslang (the Vulkan one) accepts both GLSL and GLSL ES shaders
as inputs, and both the desktop and ESSL back-ends give
incompleteness warnings when used. For now, use the desktop GL
450 as a target for Vulkan GLSL.

The Vulkan-specific changes are currently only to add locations
to every vertex input and fragment output.

BUG=angleproject:1575

Change-Id: I7c3f32f522e9d18e5f8618eb7927336bf4fbdcf2
Reviewed-on: https://chromium-review.googlesource.com/412266
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
9 files changed
tree: c3c96d6c2371c56364a314978b1d8f5920b5b134
  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