lib/scripts/fig2pdftex.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 # file fig2pdf.py
   5 # This file is part of LyX, the document processor.
   6 # Licence details can be found in the file COPYING.
   7 #
   8 # \author Angus Leeming
   9 # \author Bo Peng
  10 #
  11 # Full author contact details are available in file CREDITS
  12
  13
  14 # This script converts an XFIG image to something that pdflatex can process
  15 # into high quality PDF.
  16
  17 # Usage:
  18 #   python fig2pdftex.py ${base}.fig ${base}.pdft
  19 # This command generates
  20 #   ${base}.pdf  the converted pdf file
  21 #   ${base}.pdft a tex file that can be included in your latex document
  22 #       using '\input{${base}.pdft}'
  23 #
  24 # Note:
  25 #   Do not use this command as
  26 #     python fig2pdftex.py file.fig file.pdf
  27 #   the real pdf file will be overwritten by a tex file named file.pdf.
  28 #
  29
  30
  31 import os, sys, re
  32
  33
  34 def runCommand(cmd):
  35     ''' Utility function:
  36         run a command, quit if fails
  37     '''
  38     if os.system(cmd) != 0:
  39         print "Command '%s' fails." % cmd
  40         sys.exit(1)
  41
  42
  43 # We expect two args, the names of the input and output files.
  44 if len(sys.argv) != 3:
  45     sys.exit(1)
  46
  47 input, output = sys.argv[1:]
  48
  49 # Fail silently if the file doesn't exist
  50 if not os.path.isfile(input):
  51     sys.exit(0)
  52
  53 # Strip the extension from ${output}
  54 outbase = os.path.splitext(output)[0]
  55
  56 # Ascertain whether fig2dev is "modern enough".
  57 # If it is, then the help info will mention "pdftex_t" as one of the
  58 # available outputs.
  59 fout = os.popen('fig2dev -h')
  60 help_msg = fout.read()
  61 fout.close()
  62
  63
  64 if 'pdftex_t' in help_msg:
  65     # Modern versions of xfig can output the image without "special" text as
  66     # a PDF file ${base}.pdf and place the text in a LaTeX file
  67     # ${base}.pdftex_t for typesetting by pdflatex itself.
  68     runCommand('fig2dev -Lpdftex -p1 %s %s.pdf' % (input, outbase))
  69     runCommand('fig2dev -Lpdftex_t -p%s %s %s' % (outbase, input, output))
  70 else:
  71     # Older versions of xfig cannot do this, so we emulate the behaviour using
  72     # pstex and pstex_t output.
  73     runCommand('fig2dev -Lpstex %s %s.pstex' % (input, outbase))
  74     runCommand('fig2dev -Lpstex_t -p %s %s %s' % (outbase, input, output))
  75
  76     # manipulates the Bounding Box info to enable gs to produce
  77     # the appropriate PDF file from an EPS one.
  78     # The generated PostScript commands are extracted from epstopdf, distributed
  79     # with tetex.
  80     epsfile = outbase + '.pstex'
  81     tmp = mkstemp()
  82     boundingboxline = re.compile('%%BoundingBox:\s+(\d*)\s+(\d*)\s+(\d*)\s+(\d*)')
  83     for line in open(epsfile).xreadlines():
  84         if line[:13] == '%%BoundingBox':
  85             (llx, lly, urx, ury) = map(int, boundingboxline.search(line).groups())
  86             width = urx - llx
  87             height = ury - lly
  88             xoffset = - llx
  89             yoffset = - lly
  90             tmp.write('''%%%%BoundingBox: 0 0 %d %d
  91 << /PageSize  [%d %d] >> setpagedevice
  92 gsave %d %d translate
  93 ''' % (width, height, width, height, xoffset, yoffset))
  94         else:
  95             tmp.write(line)
  96     tmp.close()
  97     # direct move(rename) may fail under windows
  98     os.unlink(epsfile)
  99     os.rename(epsfile + '.??', epsfile)
 100
 101     # Convert the ${pstex} EPS file (free of "special" text) to PDF format
 102     # using gs
 103     runCommand('gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite -sOutputFile=%s.pdf %s.pstex'\
 104       % (outbase, outbase))
 105     os.unlink(epsfile)