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.TH DMXGetScreenCount __libmansuffix__ __vendorversion__

.SH NAME

DMXGetScreenCount \- determine number of back-end screens

.SH SYNOPSIS

.B #include <X11/extensions/dmxext.h>

.sp

.nf

.BI "Bool DMXGetScreenCount(Display " *dpy ,

.BI "                       int " *screen_count );

.fi

.SH DESCRIPTION

.B DMXGetScreenCount()

returns the number of back-end screens that a

.BR 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.

.PP

A DMX screen may be managed as a regular X screen in the

.BR Xdmx (1)

server or may be joined with other DMX screens using Xinerama.

.SH "RETURN VALUE"

.B DMXGetScreenCount()

sets

.I screen_count

and returns

.B True

unless there is a protocol error.

.SH NOTES

If Xinerama is active, only one logical screen will be available to

clients of the

.BR Xdmx (1)

server.  However, this call will accurately reflect the number of

composite back-end screens that the

.BR Xdmx (1)

server is using.

.SH "SEE ALSO"

.BR DMXGetScreenAttributes "(__libmansuffix__), "

.BR DMXChangeScreensAttributes "(__libmansuffix__), "

.BR DMX "(__libmansuffix__), " Xdmx (1)