lib/scripts/convertDefault.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 # file convertDefault.py
   5 # This file is part of LyX, the document processor.
   6 # Licence details can be found in the file COPYING.
   7
   8 # \author Herbert Voß
   9 # \author Bo Peng
  10
  11 # Full author contact details are available in file CREDITS.
  12
  13 # The default converter if no other has been defined by the user from the
  14 # Conversion->Converter tab of the Preferences dialog.
  15
  16 # The user can also redefine this default converter, placing their
  17 # replacement in ~/.lyx/scripts
  18
  19 # converts an image from $1 to $2 format
  20 import os, re, sys
  21
  22 # We may need some extra options only supported by recent convert versions
  23 re_version = re.compile(r'^Version:.*ImageMagick\s*(\d*)\.(\d*)\.(\d*).*$')
  24 fout = os.popen('convert -version 2>&1')
  25 output = fout.readline()
  26 fout.close()
  27 version = re_version.match(output)
  28
  29 # Imagemagick by default
  30 gm = 0
  31
  32 if version != None:
  33     major = int(version.group(1))
  34     minor = int(version.group(2))
  35     patch = int(version.group(3))
  36     version = hex(major * 65536 + minor * 256 + patch)
  37 else:
  38     # Try GraphicsMagick
  39     re_version = re.compile(r'^GraphicsMagick.*http:..www.GraphicsMagick.org.*$')
  40     version = re_version.match(output)
  41     if version != None:
  42         gm = 1
  43
  44 opts = "-depth 8"
  45
  46 # If supported, add the -define option for pdf source formats
  47 if sys.argv[1][:4] == 'pdf:' and (version >= 0x060206 or gm):
  48     opts = '-define pdf:use-cropbox=true ' + opts
  49
  50 # If supported, add the -flatten option for ppm target formats (see bug 4749)
  51 if sys.argv[2][:4] == 'ppm:' and (version >= 0x060305 or gm):
  52     opts = opts + ' -flatten'
  53
  54 if os.system(r'convert %s "%s" "%s"' % (opts, sys.argv[1], sys.argv[2])) != 0:
  55     print >> sys.stderr, sys.argv[0], 'ERROR'
  56     print >> sys.stderr, 'Execution of "convert" failed.'
  57     sys.exit(1)