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chromium / angle / angle / refs/heads/chromium/4270
commitde335c16855f11d1f0a6f0b37bee30c8a09a6c1d[log] [tgz]
authorMohan Maiya <m.maiya@samsung.com>Mon Sep 14 19:04:20 2020
committerCommit Bot <commit-bot@chromium.org>Sun Sep 20 18:05:10 2020
tree48e5b2b9137ef285389ba1044e614d496d8a5388
parent76e90947a8e421308dff9d00c4955717c6667f12 [diff]
Vulkan: Implement a SharedResourceUse pool

When adding a Resource to the ResourceUseList of ContextVk
we constructed a new SharedResourceUse object for tracking
and update of the Resource's Serial. We would then delete
it after releasing the resource. This incurs repeated
memory operation costs.

Instead we now allocate a pool of SharedResourceUse objects
and acquire and release from this pool as needed.

VTune profile of the Manhattan 30 offscreen benchmark
shows the CPU occupancy of bufferRead decrease from an
average of 0.9% -> 0.6% and imageRead decreases from
an average of 0.4% -> 0.3%. The bottleneck for both
these methods is the retain() method that leverages
the new SharedResourceUse pool.

Bug: angleproject:4950
Change-Id: Ib4f67c6f101d4b2de118014546e6cc14ad108703
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2396597
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
16 files changed
tree: 48e5b2b9137ef285389ba1044e614d496d8a5388
  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. dotfile_settings.gni
  29. LICENSE
  30. OWNERS
  31. PRESUBMIT.py
  32. README.chromium
  33. README.md
  34. 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 2.0completecompletecompletecompletecompletein progress
OpenGL ES 3.0completecompletecompletecomplete
OpenGL ES 3.1in progresscompletecompletecomplete
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
Fuchsiain progress

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