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chromium / angle / angle / refs/heads/chromium/7027
commit8f8b41e308e1daa823a2e433211325a1193622be[log] [tgz]
authorCharlie Lao <cclao@google.com>Sat Feb 15 01:54:51 2025
committerAngle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Feb 20 20:48:57 2025
tree008e584f6da144b9b80bdae0069cdb21ec42d2ab
parentc96844d9ec55d9537ab8bc524ebde071addfdc52 [diff]
Vulkan: Optimize for multiple TexSubImage calls in the same level

Based on app traces, some apps make glTexSubImage call for the same
level multiple times in a row. One extreme example is lumino_city, which
it creates a 2D texture with nullptr data, and then calls
glTexSubImage2D many times back to back for each row of the texture to
update the data.  Because we uses std::vector to store the per level
update struct (SubresourceUpdate), it means we copy these data
structures every time it grows 2x, until it hit the max size 1081. The
other common case we get into is app update some area of the texture
(like google map and gacha_life)  which also end up with a few
texSubImage calls back to back. The other more common case is we staged
a clear first and then glTexSubImage which end up with vector size of 2.
This CL changes to use std::deque instead of std::vector to store the
staged update for a given level, which allows it to grow without extra
penalty.

Bug: b/293297177
Change-Id: Iabbc143074ad9d6fcf47abbddee09ecf7f78d1a7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6271964
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Yuxin Hu <yuxinhu@google.com>
Commit-Queue: Charlie Lao <cclao@google.com>
2 files changed
tree: 008e584f6da144b9b80bdae0069cdb21ec42d2ab
  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
GGP (Stadia)complete
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