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102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
# file fig2pdf.py
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# This file is part of LyX, the document processor.
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# Licence details can be found in the file COPYING.
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#
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# \author Angus Leeming
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# \author Bo Peng
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#
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# Full author contact details are available in file CREDITS
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# This script converts an XFIG image to something that pdflatex can process
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# into high quality PDF.
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# Usage:
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# python fig2pdftex.py ${base}.fig ${base}.pdft
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# This command generates
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# ${base}.pdf the converted pdf file
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# ${base}.pdft a tex file that can be included in your latex document
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# using '\input{${base}.pdft}'
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#
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# Note:
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# Do not use this command as
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# python fig2pdftex.py file.fig file.pdf
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# the real pdf file will be overwritten by a tex file named file.pdf.
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#
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import os, sys, re
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def runCommand(cmd):
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''' Utility function:
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run a command, quit if fails
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'''
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if os.system(cmd) != 0:
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print("Command '%s' fails." % cmd)
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sys.exit(1)
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# We expect two args, the names of the input and output files.
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if len(sys.argv) != 3:
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sys.exit(1)
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input, output = sys.argv[1:]
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# Fail silently if the file doesn't exist
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if not os.path.isfile(input):
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sys.exit(0)
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# Strip the extension from ${output}
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outbase = os.path.splitext(output)[0]
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# Ascertain whether fig2dev is "modern enough".
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# If it is, then the help info will mention "pdftex_t" as one of the
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# available outputs.
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fout = os.popen('fig2dev -h')
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help_msg = fout.read()
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fout.close()
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if 'pdftex_t' in help_msg:
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# Modern versions of xfig can output the image without "special" text as
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# a PDF file ${base}.pdf and place the text in a LaTeX file
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# ${base}.pdftex_t for typesetting by pdflatex itself.
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runCommand(f'fig2dev -Lpdftex -p1 {input} {outbase}.pdf')
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runCommand(f'fig2dev -Lpdftex_t -p{outbase} {input} {output}')
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else:
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# Older versions of xfig cannot do this, so we emulate the behaviour using
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# pstex and pstex_t output.
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runCommand(f'fig2dev -Lpstex {input} {outbase}.pstex')
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runCommand(f'fig2dev -Lpstex_t -p {outbase} {input} {output}')
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# manipulates the Bounding Box info to enable gs to produce
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# the appropriate PDF file from an EPS one.
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# The generated PostScript commands are extracted from epstopdf, distributed
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# with tetex.
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epsfile = outbase + '.pstex'
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tmp = mkstemp()
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boundingboxline = re.compile(br'%%BoundingBox:\s+(\d*)\s+(\d*)\s+(\d*)\s+(\d*)')
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for line in open(epsfile, 'rb'):
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if line[:13] == b'%%BoundingBox':
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(llx, lly, urx, ury) = list(map(int, boundingboxline.search(line).groups()))
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width = urx - llx
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height = ury - lly
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xoffset = - llx
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yoffset = - lly
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tmp.write(b'''%%%%BoundingBox: 0 0 %d %d
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<< /PageSize [%d %d] >> setpagedevice
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gsave %d %d translate
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''' % (width, height, width, height, xoffset, yoffset))
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else:
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tmp.write(line)
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tmp.close()
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# direct move(rename) may fail under windows
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os.unlink(epsfile)
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os.rename(epsfile + '.??', epsfile)
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# Convert the ${pstex} EPS file (free of "special" text) to PDF format
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# using gs
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runCommand('gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite -sOutputFile=%s.pdf %s.pstex'\
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% (outbase, outbase))
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os.unlink(epsfile)
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