simple but fancy screen locker? now even faster image creation!

lock.sh

#!/bin/sh

# the lock-icon I use can be found at http://koehr.in/img/lock-icon.png and is derived from
# http://icons.iconarchive.com/icons/visualpharm/icons8-metro-style/512/Very-Basic-Lock-icon.png

TMP=/tmp
XWD=$TMP/lock-${USER}.xwd
IMG=$TMP/lock-${USER}.png
LOCK=$HOME/images/lock-icon.png

#import -window root $IMG &&
xwd -root -out $XWD
convert $XWD -sigmoidal-contrast 5x1 -blur 6x3 $IMG &&
composite -gravity center -compose exclusion $LOCK $IMG $IMG &&
i3lock -i $IMG