This MR attempts to improve the GL renderer on Windows by:
- Ensuring that we use the GL renderer by default, since now the shaders are working with GLES+ 3.0 contexts.
- Make sure that we create EGL contexts that have OpenGL/ES versions and GL API set support that match the ones that we support with the EGL contexts that we attempt to share with them. The
glareademos now work under OpenGL/ES on Windows via libANGLE.
- Clean up EGL/WGL context creation on Windows a bit, where we record the GL context type in a clearer and more robust way, and for WGL, we just create a WGL context that matches the version that is returned by
epoxy_gl_version(), so that we have the maximum WGL version supported by the driver when we create the (W)GL context.
With blessings, thank you!