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chromium / angle / angle / refs/heads/chromium/4669
commitea5804842bfea89a53ae2c2a84719f4cb78db408[log] [tgz]
authorCharlie Lao <cclao@google.com>Tue Oct 05 20:40:01 2021
committerAngle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Oct 13 19:43:36 2021
tree611761d6bb3527a70340ce575485c60810f6d802
parent9a48ad4ed0ecfe861b71ed7875164d0e0cf3fbac [diff]
Vulkan: Add feature flag to prefer CPU copy instead of staged update

For ARM GPU, use GPU to do buffer to buffer copy has performance penalty
due to potential bubble in the vertex pipeline. This CL adds a feature
flag preferCPUForBufferDataSubData so that we can enable this behavior
for ARM GPUs.

This CL also tracks if GPU has referenced this BufferVk's storage since
it got new storage. Due to sub-allocation, we may get a new sub-range of
the same BufferHelper object when allocating new storage. But we
currently do not have a way to track GPU progress of the sub-range of a
buffer. So we will end up using BufferHelper's queueSerial to decide if
it is still GPU busy or not. This CL adds mHasBeenReferencedByGPU
boolean variable that will set to false when we got a new allocation and
set to true as soon as buffer is been referenced by any GPU command. We
use this to avoid checking queueSerial if it never been referenced by
GPU. This is a temporary workaround for the bug, the full fix is tracked
by https://issuetracker.google.com/201826021

Bug: b/200067929
Change-Id: I231fb0a678b0165a2ce1775d0aa4dbe7512fb4a8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3183398
Commit-Queue: Charlie Lao <cclao@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
4 files changed
tree: 611761d6bb3527a70340ce575485c60810f6d802
  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. Android.mk
  24. AUTHORS
  25. BUILD.gn
  26. codereview.settings
  27. CONTRIBUTORS
  28. DEPS
  29. DIR_METADATA
  30. dotfile_settings.gni
  31. LICENSE
  32. OWNERS
  33. PRESUBMIT.py
  34. README.chromium
  35. README.md
  36. 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