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