PNGCompress

#!/bin/bash
if [ -z "$1" ]; then
	echo usage: compressimg [directory or file]
	exit
fi

# apply the compressimg script to every image file within the given directory
# if the input is a single file, execute the script on it
OLDSIZE=`du -sk $1 | awk '{ print $1}'`
# echo 'OLDSIZE'
# echo $OLDSIZE
INPUTTYPE="Directory"

# execute compression
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
if [ -d $1 ]; then
	find $1 -type f \( -name "*.png" \) -exec $DIR/pngquantWrapper '{}' \;
else
	INPUTTYPE="File"
	$DIR/pngquantWrapper $1
fi

NEWSIZE=`du -sk $1 | awk '{ print $1}'`
let RESULT=100-$NEWSIZE*100/$OLDSIZE
echo ''
echo $1 Finished.
echo 'NEWSIZE/OLDSIZE' $NEWSIZE'/'$OLDSIZE 
echo 'TOTAL:'$RESULT'% COMPRESSED.'
echo ''