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chromium / angle / angle / refs/heads/chromium/4017
commit81ee4d29192dcd0bdef05d39829d7c37e231b0e2[log] [tgz]
authorshrekshao <shrekshao@google.com>Thu Dec 05 01:05:11 2019
committerCommit Bot <commit-bot@chromium.org>Fri Jan 03 17:56:58 2020
tree3458b44934abfbc6d53aeb4da092493dc3e0f31f
parentde97fb4ac4c620af943fc0ecaddb3dd50621689b [diff]
Workaround EXT_texture_norm16 for OpenGL ES drivers

Implement a workaround for widespread bugs calling glReadPixels with
RGBA/UNSIGNED_SHORT against R16/RG16 color attachments. Read back the
data using the GL_IMPLEMENTATION_COLOR_READ_FORMAT, and then rearrange
the read back pixels to fit the RGBA layout.

Also skip RGB16/RGB16_SNORM texture sample test on Nexus 5X/Nexus 6P
due to a another driver bug.

Bug: chromium:1000354, angleproject:4214, angleproject:4215, angleproject:4245
Change-Id: Iedea6f4136878cac5ad0dec3757c77b73502e1cd
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1952166
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
8 files changed
tree: 3458b44934abfbc6d53aeb4da092493dc3e0f31f
  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