移行アイコン作成

transitional_icon.sh

#!/bin/sh

new_icon=$1
old_icon=$2
composite_icon_name=$3
percentage=35

size=`identify $new_icon | cut -d' ' -f3 | cut -d'x' -f1`
resize_size=$(($size * $percentage / 100))
geometry=$(($size - $resize_size))

convert $old_icon -resize ${resize_size}x${resize_size} png:- | composite -geometry +${geometry}+${geometry} png:- $new_icon $composite_icon_name