Vertical sync

[LoganDark]

Is it possible to perform vertical sync with this library? i.e. deliver a new frame to the screen every monitor refresh, but not any more frequently? It doesn't seem like the library does anything special about it, but I'm not 100% sure how this should work (is it the responsibility of the user to figure out the refresh rate and stuff?).

[i509VCB]

Wayland should be able to implement this with frame callbacks.

[ids1024]

This would probably be better implemented in winit as an event sent to the event loop (rust-windowing/winit#2412). We could make set_buffer block on the frame callback, which Mesa's eglSwapBuffers does when eglSwapInterval isn't zero. But that blocks indefinitely on an occluded window, and should at most be an option.