Feature Request: Add Google ANGLE backend

[Ali-RS]

Adding Google ANGLE backend to JME will be a great enhancement.

JME can make OpenGL ES 3 calls to ANGLE and it will convert the call to the target-specific graphics API. (OpenGL, OpenGL ES, DirectX, Metal, Vulkan) and should work the same on all platforms including Android and iOS.

This will remove the need of having a separate backend for OpenGL, Vulkan, and Metal and will move all the hassles of dealing will target specific rendering issues to Google.

[tlf30]

Interesting.
I guess the main disadvantage would be the loss of the platform specific optimizations that are gained from Vulkan and Metal.