git.maemo.org Git - gonvert/blob - support/scale.py

   1 #!/usr/bin/env python
   2
   3 from __future__ import with_statement
   4 from __future__ import division
   5
   6 import os
   7 import logging
   8
   9 from PIL import Image
  10
  11
  12 _moduleLogger = logging.getLogger(__name__)
  13
  14
  15 def main(args):
  16         import optparse
  17         parser = optparse.OptionParser()
  18         parser.add_option(
  19                 "--input", dest="input",
  20                 help="Input image to scale", metavar="INPUT"
  21         )
  22         parser.add_option(
  23                 "--output", dest="output",
  24                 help="Scaled image", metavar="OUTPUT"
  25         )
  26         parser.add_option(
  27                 "--size", dest="size",
  28                 help="Icon size", metavar="SIZE"
  29         )
  30         options, positional  = parser.parse_args(args)
  31         if positional:
  32                 parser.error("No positional arguments supported")
  33         if None in [options.input, options.output, options.size]:
  34                 parser.error("Missing argument")
  35         if options.size == "guess":
  36                 parts = reversed(os.path.split(options.output))
  37                 for part in parts:
  38                         try:
  39                                 options.size = int(part)
  40                                 _moduleLogger.info("Assuming image size of %r" % options.size)
  41                                 break
  42                         except ValueError:
  43                                 pass
  44
  45         icon = Image.open(options.input)
  46         icon.thumbnail((int(options.size), int(options.size)), Image.ANTIALIAS)
  47         icon.save(options.output)
  48
  49
  50 if __name__ == "__main__":
  51         import sys
  52         retcode = main(sys.argv[1:])
  53         sys.exit(retcode)