#!/bin/sh
diffs=0
rm -f _diff*png
for n in out*.png; do
	ref=ref${n#out}
	diff=_diff${n#out}
	if ! compare -metric AE $ref $n - >/dev/null; then
		diffs=`expr $diffs + 1`
		compare -metric AE $ref $n $diff
	fi
done
echo
[ $diffs = 0 ] && exit 0
echo "$diffs difference(s)" 1>&2
exit 1