drawable-xhdpiディレクトリにある画像ファイルを元に、（縦横二倍して）drawable-xxxhdpiを生成する

create_xxxhdpi_images_from_xhdpi.py

#!/usr/bin/env python2.7
#coding=utf-8
"""
指定ディレクトリ下のdrawable-xhdpiディレクトリにある画像ファイルを元に、（縦横二倍して）drawable-xxxhdpiディレクトリ下に画像ファイルを生成します。
主にAndroid用。

Usage
    $ create_xxxhdpi_images_from_xhdpi.py -r <RESOURCE_DIR>

before
- <RESOURCE_DIR>
  - drawable-xhdpi
    - xxx.png
    - yyy.png

after
- <RESOURCE_DIR>
  - drawable-xhdpi
    - xxx.png
    - yyy.png
  - drawable-xxxhdpi
    - xxx.png
    - yyy.png

This script required install PIL(Python Image Library)
$ sudo easy_install PIL
"""
__author__ = "Koji Hasegawa"
__copyright__ = "Copyright 2014, Koji Hasegawa"
__credits__ = ["Koji Hasegawa"]
__version__ = "1.0"

import shutil
import os
import re
import argparse
import sys
import Image

SOURCE_DIR      = 'drawable-xhdpi'
DESTINATION_DIR = 'drawable-xxxhdpi'


if __name__ == '__main__':
    # check arguments
    argParser = argparse.ArgumentParser(description='Create xxxhdpi size image file script')
    argParser.add_argument('-r', '--res', metavar='RESOURCE_DIR', required=True, help='Android resource directory')
    args = argParser.parse_args()
    
    # check source directory
    src_dir = os.path.join(args.res, SOURCE_DIR);
    if not os.path.exists(src_dir):
        sys.exit("Not exists resource directory")

    # create destination directory
    dst_dir = os.path.join(args.res, DESTINATION_DIR);
    if not os.path.exists(dst_dir):
        try:
            os.mkdir(dst_dir)
        except OSError as err:
            sys.exit("Can not create directory {0}. reason:{1}".format(dst_dir, err))

    # copy and resize
    for filename in os.listdir(src_dir):
        if filename!='.DS_Store':
            src_image = os.path.join(src_dir, filename)
            dst_image = os.path.join(dst_dir, filename)
            
            # check distination file
            if os.path.exists(dst_image):
                is_exist = True
            else:
                is_exist = False

            # copy and resize image
            try:
                img = Image.open(src_image)
                dst_image_size = (img.size[0]*2, img.size[1]*2)
                img.resize(dst_image_size, Image.ANTIALIAS).save(dst_image)
                del img

            except OSError as err:
                sys.exit("Can not resize {0}. reason:{1}".format(filename, err))

            # report
            if is_exist:
                print "\033[32m- overwrite: {0}\033[m".format(filename)
            else:
                print "\033[32m- create:    {0}\033[m".format(filename)