po2pad

#!/bin/bash
function _findres_it {
	local it=2
	while [ 1 ]; do
		if [ $it -gt $itval ]; then
			itval=$it
			break
		fi
		it=$(($it*2))
	done
}

function findres {
	itval=$1
	_findres_it
	width=$itval
	itval=$2
	_findres_it
	height=$itval
}

for n in $@; do
	findres `identify -format "%w %h" $n`
	mogrify -background transparent -gravity northwest -extent ${width}x${height} $n
done