Skip to content

Instantly share code, notes, and snippets.

@ademar111190
Forked from kmansoft/drawable_convert.py
Last active August 29, 2015 13:56
Show Gist options
  • Save ademar111190/9261668 to your computer and use it in GitHub Desktop.
Save ademar111190/9261668 to your computer and use it in GitHub Desktop.
#!/usr/bin/python
import sys
import argparse
import os
import re
'''
A simple script to create lower-resolution Android drawables from higher-resolution ones.
For example, given a batch of -xhdpi images, you can generate -hdpi and -mdpi images.
This makes it possible to only export highest-resolution artwork from image authoring tools, and
automate the rest.
Usage:
drawable_convert.py -d res/drawable-mdpi -d res/drawable-hdpi -d res/drawable-xhdpi res/drawable-xxhdpi/select*.png
... will take select*.png from xhdpi and place versions into mdpi and hdpi folders.
Correct resize ratios are computed based on resource directory names.
Actual scaling is done by ImageMagick's convert command.
'''
class Converter:
def __init__(self, dstList):
print u'Dst list: {0}'.format(dstList)
self.mDstList = dstList
def convert(self, src):
for dstpath in self.mDstList:
(srcpath, srcname) = os.path.split(src)
dst = os.path.join(dstpath, srcname)
self.convertOne(src, dst)
def convertOne(self, src, dst):
print u'\n*****\n{0} to {1}\n*****\n'.format(src, dst)
'''
Determine relative density
'''
srcDpi = self.getDpi(src)
dstDpi = self.getDpi(dst)
if srcDpi < dstDpi:
print u'NOT converting from {0}dpi to {1}dpi'.format(srcDpi, dstDpi)
else:
factor = dstDpi*100/srcDpi
print u'Converting from {0}dpi to {1}dpi, {2}%'.format(srcDpi, dstDpi, factor)
cmd = u'convert -verbose "{0}" -resize "{2}%x{2}%" "{1}"'.format(src, dst, factor)
os.system(cmd)
def getDpi(self, f):
p = os.path.dirname(f)
if re.match('.*drawable.*\\-mdpi.*', p):
return 160
elif re.match('.*drawable.*\\-hdpi.*', p):
return 240
elif re.match('.*drawable.*\\-xhdpi.*', p):
return 320
elif re.match('.*drawable.*\\-xxhdpi.*', p):
return 480
else:
raise ValueError(u'Cannot determine densitiy for {0}'.format(p))
if __name__ == "__main__":
'''
Parse command line arguments
'''
parser = argparse.ArgumentParser(description='Converts drawable resources in Android applications')
parser.add_argument('-d', dest='DST', action='append', required=True, help='destination directory')
parser.add_argument('src', nargs='+', help='files to convert (one or more)')
args = parser.parse_args()
cv = Converter(args.DST)
for src in args.src:
cv.convert(src)
'''
if [ $# -lt 1 ] ; then
echo "Usage: $0 file_list"
exit 1
fi
for f in $*
do
echo "File: ${f}"
convert -verbose "${f}" -resize "75%x75%" "../drawable-hdpi/${f}"
convert -verbose "${f}" -resize "50%x50%" "../drawable-mdpi/${f}"
done
'''
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment