Add support for generating UWP (Windows Store) projects again

Until late 2017, ANGLE supported  Windows Store apps on Windows 8.1,
Windows Phone 8.1, and Windows 10 (via the Universal Windows
Platform, aka UWP).

Unfortunately ANGLE deprecated support for Windows Store when it
switched from GYP to GN in 2017. Since then, users have been able
to use Microsoft\angle for their UWP apps but this isn't ideal since
it's based on a 2017 copy of Google\angle.

This PR bring back support for UWPs, so that UWP users can use
Google\angle again. Specifically it:

- Adds support for generating UWP projects via GN
- Adds helper/util functions specific to UWP (they're mostly
similar to the desktop Windows helpers)
- Fixes some existing Windows Store code that's rotted since 2017
- Disables async shader compilation for UWPs, since its
implementation calls wait on the UI thread (which is forbidden
in UWPs)
- Renames 'ANGLE_ENABLE_WINDOWS_STORE' to
'ANGLE_ENABLE_WINDOWS_UWP', since ANGLE only support UWPs now
- Fixes misc other related issues (such as dependencies on D3D9
headers in API-agnostic code)

Note that this doesn't bring back support for Windows/Phone 8.1.

BUG=angleproject:3922

Change-Id: Ia79ae05a5e0e0a0625eb633bf1928722dfd3e85f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1811871
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
27 files changed
tree: e3f9d5d0da25f76ae348db96851867de5a107e0f
  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. additional_readme_paths.json
  20. AUTHORS
  21. BUILD.gn
  22. codereview.settings
  23. CONTRIBUTORS
  24. DEPS
  25. dotfile_settings.gni
  26. LICENSE
  27. OWNERS
  28. PRESUBMIT.py
  29. README.chromium
  30. README.md
  31. 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 and 3.0 to desktop OpenGL, OpenGL ES, Direct3D 9, and Direct3D 11. Support for translation from OpenGL ES to Vulkan is underway, and future plans include compute shader support (ES 3.1) and MacOS support.

Level of OpenGL ES support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkan
OpenGL ES 2.0completecompletecompletecompletecomplete
OpenGL ES 3.0completecompletecompletein progress
OpenGL ES 3.1in progresscompletecompletein progress
OpenGL ES 3.2plannedplannedplanned

Platform support via backing renderers

Direct3D 9Direct3D 11Desktop GLGL ESVulkan
Windowscompletecompletecompletecompletecomplete
Linuxcompletecomplete
Mac OS Xcomplete
Chrome OScompleteplanned
Androidcompletecomplete
Fuchsiain progress

ANGLE v1.0.772 was certified compliant by passing the ES 2.0.3 conformance tests in October 2011. 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, 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