#!/bin/bash
#
#   chxbg - Set X background from command line or random (my files)
#

#  Where to get the selection of images:
#bgdir="/usr/local/Propaganda/"
bgdir="/usr/local/GimpFoolery/"
#  Where to store the image in xpm format for rxvt:
rxvtFile="$HOME/bin/rxvt.xpm"
tmpfile="/tmp/$(basename ${0}).$$.txt"

if [ ! ${DISPLAY} ]
then
	echo "This program requires X, which doesn't appear to be running."
	exit 1
fi

if [ -f "${1}" ]
then
	bgName="${1}"
else
	find ${bgdir} -name "*.jpg" -print | grep -v \.xvpics >  ${tmpfile}
	find ${bgdir} -name "*.png" -print | grep -v \.xvpics >> ${tmpfile}
	numbgs="$(cat $tmpfile | wc -l)"
	randbg="$(echo -e "scale=0 \n${numbgs}*${RANDOM}/32767 \nquit" | bc)"
	bgName="$(echo "$(cat ${tmpfile} | awk 'NR=='${randbg}' {print $0}')")"
	rm ${tmpfile}
fi

#if which Esetroot 2> /dev/null >/dev/null
#then
	#   Same effect as display, but makes Eterm work much better:
	#Esetroot ${bgName}
#else
	#display -window root ${bgName}
	#xv -root ${bgName} & sleep 1 && killall xv
	#wmsetbg --tile ${bgName}
	fbsetbg -t ${bgName}
#fi
#  Make an xpm of the image with reduced brightness and saturation for 
#  rxvt (requires ImageMagick):
#convert -modulate 60,70 ${bgName} ${rxvtFile}
convert -colorize 75,75,75 ${bgName} ${rxvtFile}