Requires ANGLE to be built locally. See https://chromium.googlesource.com/angle/angle

This is based off the UWP template in the old MS fork of ANGLE, and ported to C++/WinRT. The template is still viewable at https://github.com/microsoft/angle/tree/2017-lkg/templates/10/Windows/Universal/CoreWindowUniversal.

To get the template code to compile, had to make similar changes to those in https://github.com/CartoDB/mobile-sdk/commit/e7c325f44c91350d0c2f68252f12d2b001ac733e (found after the fact searching for EGL_ANGLE_DISPLAY_ALLOW_RENDER_TO_BACK_BUFFER).

To build ANGLE, clone the repo as described in the ANGLE link above. Run gn gen out/DebugUwp and then gn args out/DebugUwp, and set the build args to:

target_os = "winuwp"
is_clang = false

Then build with autoninja -C out/DebugUwp.

(TODO: Build fails if is_clang is not set. However appears to force MSVC to build targeting UWP, and tries to use "CL.exe" with the wrong defaults. Figure this out and either log a bug or fix it.)

This repo then has two projects. The one in the .\WRL directory can be built from the command line with MSVC or Clang, and only uses the WRL libraries, not C++/WinRT or C++/CX. This would work in most other environments the easiest. To use, just CD into the WRL directory and run build or build clang followed by build pack. This last step will also register the built AppX on your machine to run.

The project in the root of the repo is a C++/WinRT Visual Studio 2019 project. After building, copy the below 3 files to the x64\Debug\CoreAppAngle\AppX directory before deploying.

• libEGL.dll
• libGLESv2.dll
• zlib.dll

(TODO: Figure out how to copy these at build time)

If your ANGLE project is at a different location than C:\src\angle, then update the paths in the .vcxproj file accordingly.