#! /bin/bash

PATH=$PATH:/usr/bin

cutVMpng(){
echo "processing $i..."

xoff=10
yoff=53
fwidth=`file $1 |cut -f 2 -d"," | cut -f2 -d" "`
fheight=`file $1 |cut -f 2 -d"," | cut -f4 -d" "`

width=$(echo $fwidth - 18 |bc -l)
height=$(echo $fheight - 79 |bc -l)
pngtopnm $i | pnmcut $xoff $yoff $width $height | pnmtopng >${i%.???}-nf.png
}

for i in $*; do
    case $i in
	*-s.png|*-nf.png) ;;
	*.png) cutVMpng $i ;;
	*) ;;
    esac
done

exit 0