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android / platform / external / angle / 776c60150b
commit776c60150bdeb6be980137a30be6da4824a28701[log] [tgz]
authorShahbaz Youssefi <syoussefi@chromium.org>Fri Feb 26 00:00:57 2021 -0500
committerCommit Bot <commit-bot@chromium.org>Thu Mar 25 19:53:52 2021 +0000
tree334684a64836d587e7cd9f54daf9ec1c53cc5210
parenteac2397bcf94e97fd22f9cfb9f695de94729c97b [diff]
Vulkan: Call glslang at compile time

With this change, the ANGLE translator immediately compiles the
generated GLSL into SPIR-V with glslang and discards the source.  This
is in preparation for generating SPIR-V directly, by making the frontend
and backend already able to digest it.

This change also allows the expensive glslang calls to be parallelized,
improving the following perf test by about 20%:

    LinkProgramBenchmark.Run/vulkan_compile_and_link_multi_thread

Previously, the test was run as such in the Vulkan backend:

    Main           Thread 1          Thread 2
    Compile1 --->
    Compile2 --------------------->
                  Translator        Translator
             <---
             <---------------------
    Link

    glslang
     for
      shader1

    glslang
     for
      shader2

    Done

With this change, it is run as such:

    Main           Thread 1          Thread 2
    Compile1 --->
    Compile2 --------------------->
                  Translator        Translator
                   glslang           glslang
             <---
             <---------------------
    Link
    Done

glslang_wrapper_utils no longer interacts with glslang! A rename will
follow.

Bug: angleproject:4889
Change-Id: If4303e8ba0ba43b1a2f47f8c0a9133d0bee1a19a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2721195
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
40 files changed
tree: 334684a64836d587e7cd9f54daf9ec1c53cc5210
  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. .vpython
  20. .vpython3
  21. .yapfignore
  22. additional_readme_paths.json
  23. AUTHORS
  24. BUILD.gn
  25. codereview.settings
  26. CONTRIBUTORS
  27. DEPS
  28. DIR_METADATA
  29. dotfile_settings.gni
  30. LICENSE
  31. OWNERS
  32. PRESUBMIT.py
  33. README.chromium
  34. README.md
  35. 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, 3.0 and 3.1 to Vulkan, desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Future plans include ES 3.2, translation to Metal and MacOS, Chrome OS, and Fuchsia support.

Level of OpenGL ES support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
OpenGL ES 2.0completecompletecompletecompletecompletecomplete
OpenGL ES 3.0completecompletecompletecompletein progress
OpenGL ES 3.1incompletecompletecompletecomplete
OpenGL ES 3.2in progressin progressin progress

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
Windowscompletecompletecompletecompletecomplete
Linuxcompletecomplete
Mac OS Xcompletein progress
iOSplanned
Chrome OScompleteplanned
Androidcompletecomplete
GGP (Stadia)complete
Fuchsiacomplete

ANGLE v1.0.772 was certified compliant by passing the OpenGL ES 2.0.3 conformance tests in October 2011.

ANGLE has received the following certifications with the Vulkan backend:

  • OpenGL ES 2.0: ANGLE 2.1.0.d46e2fb1e341 (Nov, 2019)
  • OpenGL ES 3.0: ANGLE 2.1.0.f18ff947360d (Feb, 2020)
  • OpenGL ES 3.1: ANGLE 2.1.0.f5dace0f1e57 (Jul, 2020)

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, Vulkan 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