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)