ios-icon-tool

#!/bin/sh

: ' 
  Requirements:
  $ brew install imagemagick

  Usage: 
  $ ./icon-tool iconPath destination

  Where:
    * iconpath: the path of the icon you will use as source, it has be 1024 x 1024. Defaults to: ../skin/res/ios/icon.png
    * destination: the folder where you want to output the icon. Defaults to: ../skin/res/ios/icons  

  - Android ouput:
    Not available yet, it will be generated by Android studio for now.

  - iOS output:
        <icon src="res/ios/icons/[email protected]" width="20" height="20" />
        <icon src="res/ios/icons/[email protected]" width="40" height="40" />
        <icon src="res/ios/icons/[email protected]" width="60" height="60" />
        <icon src="res/ios/icons/[email protected]" width="29" height="29" />
        <icon src="res/ios/icons/[email protected]" width="58" height="58" />
        <icon src="res/ios/icons/[email protected]" width="87" height="87" />
        <icon src="res/ios/icons/[email protected]" width="40" height="40" />
        <icon src="res/ios/icons/[email protected]" width="80" height="80" />
        <icon src="res/ios/icons/[email protected]" width="120" height="120" />
        <icon src="res/ios/icons/[email protected]" width="57" height="57" />
        <icon src="res/ios/icons/[email protected]" width="114" height="114" />
        <icon src="res/ios/icons/[email protected]" width="60" height="60" />
        <icon src="res/ios/icons/[email protected]" width="120" height="120" />
        <icon src="res/ios/icons/[email protected]" width="180" height="180" />
        <icon src="res/ios/icons/[email protected]" width="72" height="72" />
        <icon src="res/ios/icons/[email protected]" width="144" height="144" />
        <icon src="res/ios/icons/[email protected]" width="76" height="76" />
        <icon src="res/ios/icons/[email protected]" width="152" height="152" />
        <icon src="res/ios/icons/[email protected]" width="228" height="228" />
        <icon src="res/ios/icons/[email protected]" width="167" height="167" />
        <icon src="res/ios/icons/[email protected]" width="50" height="50" />
        <icon src="res/ios/icons/[email protected]" width="100" height="100" />
        <icon src="res/ios/icons/[email protected]" width="48" height="48" />
        <icon src="res/ios/icons/[email protected]" width="55" height="55" />
        <icon src="res/ios/icons/[email protected]" width="88" height="88" />
        <icon src="res/ios/icons/[email protected]" width="172" height="172" />
        <icon src="res/ios/icons/[email protected]" width="196" height="196" />
        <icon src="res/ios/icons/[email protected]" width="1024" height="1024" />
'

sizes="20x1 20x2 20x3 24x2 27.5x2 29x1 29x2 29x3 40x1 40x2 40x3 44x2 50x1 50x2 57x1 57x2 60x1 60x2 60x3 72x1 72x2 76x1 76x2 76x3 83.5x2 86x2 98x2 1024x1"

source=${1:-"../skin/res/ios/icon.png"}
dst=${2:-"../skin/res/ios/icons"}

for s in $sizes;do
  size=${s%x*}
  scale=${s##*x}
  resize=$(bc <<< ${size}*${scale} )
  generatedIcon=$dst/"Icon-App-${size}x${size}@${scale}x.png"
  convert "$source" -resize ${resize}x${resize} $generatedIcon
  if [ -f $generatedIcon ];
  then
    echo "Created: $generatedIcon"
  else
    echo "Could not create $generatedIcon"
  fi
done