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chromium / angle / angle / refs/heads/chromium/6628
commit4c883359f50837700fdcb5dd8aafb029674a507c[log] [tgz]
authorMarcin Radomski <dextero@google.com>Wed Jul 03 13:50:58 2024
committerAngle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue Jul 30 19:10:53 2024
tree87e255e94133b58a094ee6367498884718ad5e55
parent3cda352736451fcfd8927ad271212943923821d8 [diff]
Add dma_buf build support to generate_android_bp

Minimized version of go/anglecl/5729843 that limits introduced changes.

Make generate_android_bp.py emit a `angle_android_dma_buf` Soong
config variable that, when enabled, creates a "Linux-like" build
using Android toolchain.

The build does not assume the presence of regular Android graphics
stack. eglGetDisplay defaults to creating DisplayVkOffscreen. This
enables EGL rendering context setup based on an externally allocated
DMA-BUF, using EGL_EXT_image_dma_buf_import and
GL_OES_EGL_image_external extensions.

See ag/28533701 to view the generated code.

Also, revert changes from "Add build flag for a "dma_buf" Android build"
(commit 4d2b365582669a04224d1e1fa3c92447c359a4ba).

The flag added there was submitted a bit prematurely, and as
go/anglecl/5729843 was deemed too complex a different approach was
necessary.

Test: CQ
Test: Build the entire CL chain with the new Soong config flag enabled
Test: run the system, attach debugger to eglGetDisplay(), see
Test: DisplayVkOffscreen getting instantiated
Bug: b/353262025
Change-Id: I974d91cff79a0bd8b5059a145f0ae6114b2bcbe5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5746214
Reviewed-by: Roman Lavrov <romanl@google.com>
Commit-Queue: Roman Lavrov <romanl@google.com>
Auto-Submit: Marcin Radomski <dextero@google.com>
5 files changed
tree: 87e255e94133b58a094ee6367498884718ad5e55
  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. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. .style.yapf
  23. .vpython
  24. .vpython3
  25. .yapfignore
  26. additional_readme_paths.json
  27. Android.mk
  28. AUTHORS
  29. BUILD.gn
  30. codereview.settings
  31. CONTRIBUTORS
  32. DEPS
  33. DIR_METADATA
  34. dotfile_settings.gni
  35. LICENSE
  36. OWNERS
  37. PRESUBMIT.py
  38. README.chromium
  39. README.md
  40. 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