ひとつのファイルからiOSアプリのアイコンを全部作るRubyスクリプト tiny script for making ios app icons in all sizes #USAGE ruby iosicon.rb ICON_NAME

iosicon.rb

# coding:utf-8

require "rubygems"
require "RMagick"

if !ARGV[0]
  STDERR.puts "missing argument"
  exit
end

if ARGV.length > 1
  STDERR.puts "too many arguments : " + ARGV.length.to_s
  exit
end

sizes = {
  "Icon-72" => 72,
  "Icon-72@2x" => 144,
  "Icon-Small-50" => 50,
  "Icon-Small-50@2x" => 100,
  "Icon-Small" => 29,
  "Icon-Small@2x" => 58,
  "Icon" => 57,
  "Icon@2x" => 114,
  "iTunesArtwork" => 512,
  "iTunesArtwork@2x" => 1024
}

begin
  image_list = Magick::ImageList.new ARGV[0]
rescue => e
  STDERR.puts e
  exit
end

if image_list.format != "PNG"
  STDERR.puts "file is not png"
  exit
end

if image_list.columns != image_list.rows
   STDERR.puts "image is not square"
   exit
end

sizes.each_key{|key|
  s = sizes[key]
  image_list.resize(s,s).write(key+".png")
}