DMXGetScreenCount(3)

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)

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