NAME

       DMXGetScreenCount - determine number of back-end screens

SYNOPSIS

       #include <X11/extensions/dmxext.h>

       Bool DMXGetScreenCount(Display *dpy,
                              int *screen_count);

DESCRIPTION

       DMXGetScreenCount() returns the number of back-end screens that a Xdmx(1) server controls.
       Since a DMX screen usually fills all of the available area on a back-end server, there  is
       usually  a one-to-one correspondence between DMX screens and backend servers.  However, it
       is also possible for a DMX screen to cover only part of the available area on  a  back-end
       server, and for more than one DMX screens to occupy different parts of the visible area on
       the same back-end server.

       A DMX screen may be managed as a regular X screen in the Xdmx(1) server or may  be  joined
       with other DMX screens using Xinerama.

RETURN VALUE

       DMXGetScreenCount() sets screen_count and returns True unless there is a protocol error.

NOTES

       If Xinerama is active, only one logical screen will be available to clients of the Xdmx(1)
       server.  However, this call will accurately  reflect  the  number  of  composite  back-end
       screens that the Xdmx(1) server is using.

SEE ALSO

       DMXGetScreenAttributes(3), DMXChangeScreensAttributes(3), DMX(3), Xdmx(1)