00530769f7
The composite overlay window (COW) can be queried from any X11 client,
not just the X11 compositing manager.
If a client tries to get the composite overlay window, the Xserver will
map the window and block all pointer events (the window being mapped and
on top of the stack).
To avoid that issue, unset the "mapped" state of the composite overlay
window once realized when Xwayland is running rootless.
Note: All Xservers are actually affected by this issue, but with most
regular X servers, the compositing manager will take care of dealing
with the composite overlay window, and an X11 client using
GetOverlayWindow() won't break pointer events for all X11 clients.
Wayland compositors however usually run Xwayland rootless and have no
use for the COW.
v2: Avoid registering damage for the COW (Michel)
v3: Remove the "mapped" test to avoid calling register_damage() if the
COW is not mapped (Michel)
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1314
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
(cherry picked from commit
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| meson.build | ||
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| xserver.ent.in | ||
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: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: