mkicons.sh

#!/bin/bash
#
# name:
#   mkicon.sh
#
# description:
#   Generates icon images from original file
#   The original image should be larger than 1024x1024 in pixel
#
# parameters:
#   $1:original file
#   $2:mac/ios
#
# dependencies:
#   sips
#
if [ $# -ne 2 ];then
  echo give me an original file and mac/ios
  exit 1
fi
org=$1
target=$2
if [ ! -f $org ];then
  echo file not found: $org
  exit 1
fi
OLD_IFS=$IFS
IFS='.'
set -- $org
if [ $# -ne 2 ];then
  IFS=$OLD_IFS
  echo File format error. Filename should not contain \
        multiple \'.\' : $org
  exit 1
fi
prefix=$1
suffix=$2
IFS=$OLD_IFS
case $target in
  "mac" ) sizes=(16 32 64 128 256 512 1024);;
  "ios" ) sizes=(29 58 87 76 152 60 120 180 \
                  40 80 120 72 144 50 100 57 \
                  114 512 1024);;
esac
for i in ${sizes[@]}
do
  f=${prefix}_${i}.${suffix}
  cp $org $f
  sips -Z $i $f
done