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android/platform/external/angle/5f857839b9
commit
5f857839b9ece789d3e3881395f898b4a5625b54
[log]
author
Ian Elliott <ianelliott@google.com>
Wed Dec 04 15:30:50 2019 -0700
committer
Commit Bot <commit-bot@chromium.org>
Thu Dec 05 01:44:32 2019 +0000
tree
7287faa267b12d7f1dc9582a88fdbf8d1c8370de
parent
2719fa446b8f880245c7e608fe802ed4f6cba516 [diff]
Improve current multisampled renderbuffer/texture support

This is split off from a change to implement multisampled textures for
the Vulkan back-end, and will come before that change.  The changes
include:

- Make a common utility rx::GetSamplePosition() function.  D3D11 and
  Vulkan use the same standard sample positions/locations for 1, 2, 4,
  8, and 16 samples.  The D3D11 back-end has a utility function for
  this, which is being moved to a common location--for use by both the
  D3D11 and Vulkan back-ends.

- Texture::setStorageMultisample() handles converting the "requested number of
  samples" to the actual number of samples used (e.g. converting 3 to 4),
  supported by the underlying back-end).  The actual number used is stored in
  gl::TextureState::mImageDescs, for use by other GLES commands.

- Change some end2end tests to not make assumptions about the supported number
  of samples, but to properly query what is supported.

Bug: angleproject:3565
Bug: angleproject:4196
Change-Id: I1dc12fedd0f8fb4975f90d87486e443b069b7141
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1948535
Commit-Queue: Ian Elliott <ianelliott@google.com>
Reviewed-by: Ian Elliott <ianelliott@google.com>
9 files changed
tree: 7287faa267b12d7f1dc9582a88fdbf8d1c8370de
  1. android/
  2. build_overrides/
  3. doc/
  4. extensions/
  5. gni/
  6. include/
  7. infra/
  8. samples/
  9. scripts/
  10. src/
  11. third_party/
  12. tools/
  13. util/
  14. .clang-format
  15. .gitattributes
  16. .gitignore
  17. .gn
  18. .style.yapf
  19. .yapfignore
  20. additional_readme_paths.json
  21. AUTHORS
  22. BUILD.gn
  23. codereview.settings
  24. CONTRIBUTORS
  25. DEPS
  26. dotfile_settings.gni
  27. LICENSE
  28. OWNERS
  29. PRESUBMIT.py
  30. README.chromium
  31. README.md
  32. WATCHLISTS
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 ESVulkanMetal
OpenGL ES 2.0completecompletecompletecompletecompletein progress
OpenGL ES 3.0completecompletecompletein progress
OpenGL ES 3.1in progresscompletecompletein progress
OpenGL ES 3.2plannedplannedplanned

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
Windowscompletecompletecompletecompletecomplete
Linuxcompletecomplete
Mac OS Xcompletein progress
iOSplanned
Chrome OScompleteplanned
Androidcompletecomplete
Fuchsiain 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