Yeah I'm kinda surprised by this. You would think there would be some industry support for emulating graphics/gpgpu pipelines to make cloud CI cheaper and simpler, but maybe it's just a much harder problem than I imagine -- to the point where mocking opengl or using dedicated hardware makes more sense.
Ah, that's too bad! I've been hunting for ways to get better integration tests on CI for Revery.
Would like to have image-based verification for certain classes of tests, and we use Azure CI pipelines - seems their VMs don't have hardware support at all for OpenGL (on any platform).
[1]: https://mesamatrix.net/#Version_OpenGL3.3-GLSL3.30