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72328e5eb9
present_unflip may be called several times from present_check_flip_window
during the same unflip. We can only copy to the screen pixmap the first
time, otherwise we may scribble over other windows. The flip pixmap
contents don't get updated after the first time anyway.
Fixes at least the following problems, which were introduced by commit
806470b9 ("present: Copy unflip contents back to the Screen Pixmap"):
On xfwm4 without compositing, run glxgears and put its window into
fullscreen mode to start flipping. While in fullscreen, open the xfwm4
window menu by pressing Alt-Space. The window menu was invisible most
of the time because it was getting scribbled over by a repeated unflip
copy.
When switching a flipping window out of fullscreen, a repeated unflip
copy could leave artifacts of the flip pixmap on the desktop.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94325
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage