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android / platform / external / angle / b77f8af7fc
commitb77f8af7fc2f3ec0bb31b65787b384b7f215bd58[log] [tgz]
authorIgor Nazarov <i.nazarov@samsung.com>Wed Apr 02 19:01:48 2025 +0300
committerAngle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com>Fri Apr 04 10:43:50 2025 -0700
tree1bcae961d0b1ea52fec79f0d68d0d5fa574819b9
parent12dd42b8222c48598571511be62f6d8b37ef93b7 [diff]
Vulkan: Ignore SUBOPTIMAL on Android without pre-rotate

Android returns `VK_SUBOPTIMAL_KHR` when window orientation changes,
while ignores size changes. When "enablePreRotateSurfaces" is disabled,
each present will return `VK_SUBOPTIMAL_KHR` if `currentTransform` is
not `VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR`, causing swapchain recreate
on each swap. This behavior makes disabling "enablePreRotateSurfaces" on
Android worse than suboptimal.

New "presentSubOptimalReturnedOnTransformChange" feature is currently
enabled only on Android for the reason described above. It may be
enabled for other platforms in the future if required.

Change also improves error handling, by moving `deferAcquireNextImage()`
call right after the `queuePresent()`, before any other call that may
fail. This will avoid repeated present of the same image if something
fails after successful `queuePresent()` call.

The `checkForOutOfDateSwapchain()` and `computePresentOutOfDate()` was
combined into a single method to improve error handling and to simplify
the code.

Bug: angleproject:397848903
Bug: angleproject:42266082
Bug: angleproject:42262166
Change-Id: I7ba2389ad2ddafc0c77c3068cd85ac9b9251ccdd
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6424753
Commit-Queue: Igor Nazarov <i.nazarov@samsung.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>
7 files changed
tree: 1bcae961d0b1ea52fec79f0d68d0d5fa574819b9
  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. build
  15. buildtools
  16. testing
  17. .clang-format
  18. .git-blame-ignore-revs
  19. .gitattributes
  20. .gitignore
  21. .gitmodules
  22. .gn
  23. .style.yapf
  24. .vpython
  25. .vpython3
  26. .yapfignore
  27. additional_readme_paths.json
  28. Android.mk
  29. AUTHORS
  30. BUILD.gn
  31. codereview.settings
  32. CONTRIBUTORS
  33. DEPS
  34. DIR_METADATA
  35. dotfile_settings.gni
  36. LICENSE
  37. OWNERS
  38. PRESUBMIT.py
  39. README.chromium
  40. README.md
  41. 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 3.0completecompletecompletecompletecomplete
OpenGL ES 3.1incompletecompletecompletecomplete
OpenGL ES 3.2in progressin progresscomplete

Additionally, OpenGL ES 1.1 is implemented in the front-end using OpenGL ES 3.0 features. This version of the specification is thus supported on all platforms specified above that support OpenGL ES 3.0 with known issues.

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkanMetal
Windowscompletecompletecompletecompletecomplete
Linuxcompletecomplete
Mac OS Xcompletecomplete [1]
iOScomplete [2]
Chrome OScompleteplanned
Androidcompletecomplete
Fuchsiacomplete

[1] Metal is supported on macOS 10.14+

[2] Metal is supported on iOS 12+

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)
  • OpenGL ES 3.2: ANGLE 2.1.2.21688.59f158c1695f (Sept, 2023)

ANGLE also provides an implementation of the EGL 1.5 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.

OpenCL Implementation

In addition to OpenGL ES, ANGLE also provides an optional OpenCL runtime built into the same output GLES lib.

This work/effort is currently work-in-progress/experimental.

This work provides the same benefits as the OpenGL implementation, having OpenCL APIs be translated to other HW-supported APIs available on that platform.

Level of OpenCL support via backing renderers

VulkanOpenCL
OpenCL 1.0in progressin progress
OpenCL 1.1in progressin progress
OpenCL 1.2in progressin progress
OpenCL 3.0in progressin progress

Each supported backing renderer above ends up being an OpenCL Platform for the user to choose from.

The OpenCL backend is a “passthrough” implementation which does not perform any API translation at all, instead forwarding API calls to other OpenCL driver(s)/implementation(s).

OpenCL also has an online compiler component to it that is used to compile OpenCL C source code at runtime (similarly to GLES and GLSL). Depending on the chosen backend(s), compiler implementations may vary. Below is a list of renderers and what OpenCL C compiler implementation is used for each:

  • Vulkan : clspv
  • OpenCL : Compiler is part of the native driver

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