[Wayland-bugs] [Bug 775093] Missing (partial) window redraw when returning to a window on a different workspace (gnome-shell)

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=775093

Daniel Stone <daniel at fooishbar.org> changed:

           What    |Removed                     |Added
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                 CC|                            |daniel at fooishbar.org

--- Comment #6 from Daniel Stone <daniel at fooishbar.org> ---
(In reply to Olivier Fourdan from comment #4)
> Reminds me of bug 782381 with Qt somehow, where multiple damage rectangles
> would be repainted while not damaged.
> 
> iirc, the outcome of the discussion on irc (#wayland) was that the buffer
> should be consistent even outside the damaged areas, thus pointing to a Qt
> issue rather than mutter.

Yes, that's very true. Any part of your window can be repainted at any time:
because it was previously occluded and is now visible, because it's on an
overlay and is being constantly repainted, needing to blend with changing
translucent windows above, etc etc.

Any client which sends buffers which, considered singularly / in their entirety
regardless of damage area, display incorrectly, are flat-out broken.

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