246ae00ba3
Some clients (typically Java, but maybe others) rely on ConfigureNotify or RRScreenChangeNotify events to tell that the XRandR request is successful. When emulated XRandR is used in Xwayland, compute the emulated root size and send the expected ConfigureNotify and RRScreenChangeNotify events with the emulated size of the root window to the asking X11 client. Note that the root window size does not actually change, as XRandR emulation is achieved by scaling the client window using viewports in Wayland, so this event is sort of misleading. Also, because Xwayland is using viewports, emulating XRandR does not reconfigure the outputs location, meaning that the actual size of the root window which encompasses all the outputs together may not change in a multi-monitor setup. To work around this limitation, when using an emulated mode, we report the size of that emulated mode alone as the root size for the configure notify event. Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
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.
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