DMXGetScreenCount man page on aLinux

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DMXGetScreenCount(3)					  DMXGetScreenCount(3)

       DMXGetScreenCount - determine number of back-end screens

       #include <X11/extensions/dmxext.h>

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

       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.

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

       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.

       DMXGetScreenAttribtues(3),    DMXChangeScreenAttributes(3),     DMX(3),

X Version 11			 libdmx 1.0.2		  DMXGetScreenCount(3)

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