[Wayland-bugs] [Bug 763350] GtkRevealer: reveal-child should avoid changing child allocation during animation

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763350

--- Comment #12 from Christian Hergert <christian at hergert.me> ---
After digging into this a bit more, I'm starting to wonder if the issue is in
the frame clock synchronization.

In gdkwindow-wayland.c we are expecting timing information from Weston. The
timing from weston seems to be about the time of the vblank.

The timing information we get back from mutter is the time in
ClutterStage::after-page, which as far as I can tell, it not any sort of
predictable epoch to base our timings on. It just tells us when the frame was
finished drawning, not when it has been presented, or even when the vblank
occurs.

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