#!/bin/sh
#
# Print out preferred root background image dimensions.
#	- Cameron Simpson <cs@zip.com.au>
#

cmd=$0
usage="Usage: $cmd [-v]
	-v	Emit shell variable assignments to \$dx and \$dy."

dovar=
[ "x$1" = x-v ] && { dovar=1; shift; }

[ $# = 0 ] || { echo "$usage" >&2; exit 2; }

dx=${X11_BGX:-"$X11_X"}
dy=${X11_BGY:-"$X11_Y"}
[ -n "$dx" ] \
|| { eval `xinfo`
     dx=$xinfo_screen0_x
     dy=$xinfo_screen0_y
  }

if [ $dovar ]
then echo "dx=$dx"
     echo "dy=$dy"
else echo $dx $dy
fi