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[Python]파이썬을 이용하여 앱 아이콘을 리사이즈 하기

12 September 2015

앱 개발하면서 앱 아이콘의 디자인이 바뀔 때마다 툴을 이용해서 리사이즈를 하곤 했습니다. 하지만 자주 있는 일이 아니다 보니 툴을 다시 찾아 사용하곤 했는데 상당히 귀찮았습니다.

Python을 이용하여 앱 아이콘을 리사이즈를 하고, Contents.json 파일을 생성하여 모든 파일을 덮어씌우면 교체되도록 작업해보았습니다.

파이썬 언어를 배우면서 만들었기 때문에 최적화나 언어를 잘못 사용할 수 있으므로 참고하시길 바랍니다.

사용 방법

  • Python3을 기본 사용을 전제합니다.
  • Pillow 라이브러리를 사용하였습니다.

pip를 통해 Pillow를 설치합니다.

pip install pillow

다음 명령을 통해 실행합니다.

python3 resize.py [이미지 파일 이름]

python3 resize.py a.png b.png c.png

코드

다음은 리사이즈를 수행하는 코드입니다.

#!/usr/bin/env python3
# vim:set sw=4 et smarttab:

from PIL import Image
import os, sys, json

iPhoneIconList = [ 
{'size':(40,40), 'name':'Icon-40', 'scale':1, 'idiom':['ipad']}
,{'size':(80,80), 'name':'Icon-40@2x', 'scale':2, 'idiom':['iphone', 'ipad']}
,{'size':(120,120), 'name':'Icon-40@3x', 'scale':3, 'idiom':['iphone']}
,{'size':(120,120), 'name':'Icon-60@2x', 'scale':2, 'idiom':['iphone']}
,{'size':(180,180), 'name':'Icon-60@3x', 'scale':3, 'idiom':['iphone']}
,{'size':(76,76), 'name':'Icon-76', 'scale':1, 'idiom':['ipad']}
,{'size':(152,152), 'name':'Icon-76@2x', 'scale':2, 'idiom':['ipad']}
,{'size':(72,72), 'name':'Icon-72', 'scale':1, 'idiom':['ipad']}
,{'size':(144,144), 'name':'Icon-72@2x', 'scale':2, 'idiom':['ipad']}
,{'size':(50,50), 'name':'Icon-Small-50', 'scale':1, 'idiom':['ipad']}
,{'size':(100,100), 'name':'Icon-Small-50@2x', 'scale':2, 'idiom':['ipad']}
,{'size':(29,29), 'name':'Icon-Small', 'scale':1, 'idiom':['iphone', 'ipad']}
,{'size':(58,58), 'name':'Icon-Small@2x', 'scale':2, 'idiom':['iphone', 'ipad']}
,{'size':(57,57), 'name':'Icon', 'scale':1, 'idiom':['iphone']}
,{'size':(114,114), 'name':'Icon@2x', 'scale':2, 'idiom':['iphone']}
# {'size':(512,512), 'name':'iTunesArtwork', 'scale':1},
# {'size':(1024,1024), 'name':'iTunesArtwork@2x', 'scale':2}
]

watchIconList = [
{'size':(48,48), 'name':'Icon-24@2x', 'scale':2, 'idiom':['watch'], 'role':'notificationCenter', 'subtype':'38mm'}
,{'size':(55,55), 'name':'Icon-27.5@2x', 'scale':2, 'idiom':['watch'], 'role':'notificationCenter', 'subtype':'42mm'}
,{'size':(58,58), 'name':'Icon-29@2x', 'scale':2, 'idiom':['watch'], 'role':'companionSettings'}
,{'size':(87,87), 'name':'Icon-29@3x', 'scale':3, 'idiom':['watch'], 'role':'companionSettings'}
,{'size':(80,80), 'name':'Icon-40@2x', 'scale':2, 'idiom':['watch'], 'role':'appLauncher', 'subtype':'38mm'}
,{'size':(88,88), 'name':'Icon-44@2x', 'scale':2, 'idiom':['watch'], 'role':'longLook', 'subtype':'42mm'}
,{'size':(172,172), 'name':'Icon-86@2x', 'scale':2, 'idiom':['watch'], 'role':'quickLook', 'subtype':'38mm'}
,{'size':(196,196), 'name':'Icon-98@2x', 'scale':2, 'idiom':['watch'], 'role':'quickLook', 'subtype':'42mm'}
]

def saveImage(newImage, size, newPath):
	newImage.thumbnail(size, Image.ANTIALIAS)
	newImage.save(newPath, 'PNG')

def saveContentsJson(jsonData, newPath):
	with open(newPath, 'w') as outfile:
	    json.dump(jsonData, outfile)

def makeIphoneIconContentJson(contentsJson, item):
	if not "images" in contentsJson:
		contentsJson["images"] = []
	if not "info" in contentsJson:
		contentsJson["info"] = {"version":1, "author":"xcode"}
	width = str(int(item['size'][0]/item['scale']))
	imageData = {}
	imageData["size"] = width + 'x' + width
	imageData["filename"] = item['name'] + ".png"
	imageData["scale"] = str(item['scale']) + 'x'
	for idiom in item["idiom"]:
		imageData["idiom"] = idiom
		contentsJson["images"].append(imageData.copy())
	return contentsJson

def makeAppleWatchIconContentJson(contentsJson, item):
	if not "images" in contentsJson:
		contentsJson["images"] = []
	if not "info" in contentsJson:
		contentsJson["info"] = {"version":1, "author":"xcode"}

	imageData = {}
	size = item['size'][0] / item['scale']
	if size % int(size) == 0:
		imageData["size"] = str(int(size)) + 'x' + str(int(size))
	else:
		imageData["size"] = str(size) + 'x' + str(size)
	imageData["filename"] = item['name'] + ".png"
	imageData["scale"] = str(item['scale']) + 'x'
	imageData["role"] = item["role"]
	if "subtype" in item:
		imageData["subtype"] = item["subtype"]
	for idiom in item["idiom"]:
		imageData["idiom"] = idiom
		contentsJson["images"].append(imageData.copy())
	return contentsJson

def resizeImageiPhone(dir, im, contentsJson):
	for item in iPhoneIconList:
		#import ipdb;ipdb.set_trace()
		saveImage(im.copy(), item['size'], os.path.join(dir, item['name'] + ".png"))
		makeIphoneIconContentJson(contentsJson, item)
	# saveContentsJson(contentsJson, os.path.join(dir, 'Contents.json'))

def resizeImageAppleWatch(dir, im, contentsJson):
	for item in watchIconList:
		saveImage(im.copy(), item['size'], os.path.join(dir, item['name'] + ".png"))
		makeAppleWatchIconContentJson(contentsJson, item)
	# saveContentsJson(contentsJson, os.path.join(dir, 'Contents.json'))

def makefolder(fName):
	filename = os.path.splitext(fName)
	scriptDir = os.path.dirname(__file__)
	newDir = os.path.join(scriptDir, filename[0])
	iphoneDir = os.path.join(newDir, 'iphone')
	watchDir = os.path.join(newDir, 'watch')
	if not os.path.exists(newDir):
		os.makedirs(newDir)
	if not os.path.exists(iphoneDir):
		os.makedirs(iphoneDir)
	if not os.path.exists(watchDir):
		os.makedirs(watchDir)
	return (iphoneDir, watchDir)

def main(argv):
	for fileName in argv:
		try:
			contentsJson = {}
			im = Image.open(fileName)
			dir = makefolder(fileName)
			resizeImageiPhone(dir[0], im, contentsJson)
			resizeImageAppleWatch(dir[1], im, contentsJson)
			saveContentsJson(contentsJson, os.path.join(dir[0], 'Contents.json'))
		except IOError:
			print ("This file is not exist")

if __name__ == '__main__':
	if len (sys.argv) == 1:
		print ("You don`t input filename")
		sys.exit()
	main(sys.argv[1:])