DMXGetScreenCount man page on aLinux

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DMXGetScreenCount(3)					  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 cor‐
       respondence 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  dif‐
       ferent 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
       DMXGetScreenAttribtues(3),    DMXChangeScreenAttributes(3),     DMX(3),
       Xdmx(1)

X Version 11			 libdmx 1.0.2		  DMXGetScreenCount(3)
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