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| -rwxr-xr-x | source-builder/sb/asciidoc/filters/latex/latex2png.py | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/source-builder/sb/asciidoc/filters/latex/latex2png.py b/source-builder/sb/asciidoc/filters/latex/latex2png.py deleted file mode 100755 index 3cae7c9..0000000 --- a/source-builder/sb/asciidoc/filters/latex/latex2png.py +++ /dev/null @@ -1,232 +0,0 @@ -#!/usr/bin/env python -''' -NAME - latex2png - Converts LaTeX source to PNG file - -SYNOPSIS - latex2png [options] INFILE - -DESCRIPTION - This filter reads LaTeX source text from the input file - INFILE (or stdin if INFILE is -) and renders it to PNG image file. - Typically used to render math equations. - - Requires latex(1), dvipng(1) commands and LaTeX math packages. - -OPTIONS - -D DPI - Set the output resolution to DPI dots per inch. Use this option to - scale the output image size. - - -o OUTFILE - The file name of the output file. If not specified the output file is - named like INFILE but with a .png file name extension. - - -m - Skip if the PNG output file is newer that than the INFILE. - Compares timestamps on INFILE and OUTFILE. If - INFILE is - (stdin) then compares MD5 checksum stored in file - named like OUTFILE but with a .md5 file name extension. - The .md5 file is created if the -m option is used and the - INFILE is - (stdin). - - -v - Verbosely print processing information to stderr. - - --help, -h - Print this documentation. - - --version - Print program version number. - -SEE ALSO - latex(1), dvipng(1) - -AUTHOR - Written by Stuart Rackham, <srackham@gmail.com> - The code was inspired by Kjell Magne Fauske's code: - http://fauskes.net/nb/htmleqII/ - - See also: - http://www.amk.ca/python/code/mt-math - http://code.google.com/p/latexmath2png/ - -COPYING - Copyright (C) 2010 Stuart Rackham. Free use of this software is - granted under the terms of the MIT License. -''' - -# Suppress warning: "the md5 module is deprecated; use hashlib instead" -import warnings -warnings.simplefilter('ignore',DeprecationWarning) - -import os, sys, tempfile, md5 - -VERSION = '0.1.0' - -# Include LaTeX packages and commands here. -TEX_HEADER = r'''\documentclass{article} -\usepackage{amsmath} -\usepackage{amsthm} -\usepackage{amssymb} -\usepackage{bm} -\newcommand{\mx}[1]{\mathbf{\bm{#1}}} % Matrix command -\newcommand{\vc}[1]{\mathbf{\bm{#1}}} % Vector command -\newcommand{\T}{\text{T}} % Transpose -\pagestyle{empty} -\begin{document}''' - -TEX_FOOTER = r'''\end{document}''' - -# Globals. -verbose = False - -class EApp(Exception): pass # Application specific exception. - -def print_stderr(line): - sys.stderr.write(line + os.linesep) - -def print_verbose(line): - if verbose: - print_stderr(line) - -def write_file(filename, data, mode='w'): - f = open(filename, mode) - try: - f.write(data) - finally: - f.close() - -def read_file(filename, mode='r'): - f = open(filename, mode) - try: - return f.read() - finally: - f.close() - -def run(cmd): - global verbose - if verbose: - cmd += ' 1>&2' - else: - cmd += ' 2>%s 1>&2' % os.devnull - print_verbose('executing: %s' % cmd) - if os.system(cmd): - raise EApp, 'failed command: %s' % cmd - -def latex2png(infile, outfile, dpi, modified): - '''Convert LaTeX input file infile to PNG file named outfile.''' - outfile = os.path.abspath(outfile) - outdir = os.path.dirname(outfile) - if not os.path.isdir(outdir): - raise EApp, 'directory does not exist: %s' % outdir - texfile = tempfile.mktemp(suffix='.tex', dir=os.path.dirname(outfile)) - basefile = os.path.splitext(texfile)[0] - dvifile = basefile + '.dvi' - temps = [basefile + ext for ext in ('.tex','.dvi', '.aux', '.log')] - skip = False - if infile == '-': - tex = sys.stdin.read() - if modified: - checksum = md5.new(tex).digest() - md5_file = os.path.splitext(outfile)[0] + '.md5' - if os.path.isfile(md5_file) and os.path.isfile(outfile) and \ - checksum == read_file(md5_file,'rb'): - skip = True - else: - if not os.path.isfile(infile): - raise EApp, 'input file does not exist: %s' % infile - tex = read_file(infile) - if modified and os.path.isfile(outfile) and \ - os.path.getmtime(infile) <= os.path.getmtime(outfile): - skip = True - if skip: - print_verbose('skipped: no change: %s' % outfile) - return - tex = '%s\n%s\n%s\n' % (TEX_HEADER, tex.strip(), TEX_FOOTER) - print_verbose('tex:\n%s' % tex) - write_file(texfile, tex) - saved_pwd = os.getcwd() - os.chdir(outdir) - try: - # Compile LaTeX document to DVI file. - run('latex %s' % texfile) - # Convert DVI file to PNG. - cmd = 'dvipng' - if dpi: - cmd += ' -D %s' % dpi - cmd += ' -T tight -x 1000 -z 9 -bg Transparent --truecolor -o "%s" "%s" ' \ - % (outfile,dvifile) - run(cmd) - finally: - os.chdir(saved_pwd) - for f in temps: - if os.path.isfile(f): - print_verbose('deleting: %s' % f) - os.remove(f) - if 'md5_file' in locals(): - print_verbose('writing: %s' % md5_file) - write_file(md5_file, checksum, 'wb') - -def usage(msg=''): - if msg: - print_stderr(msg) - print_stderr('\n' - 'usage:\n' - ' latex2png [options] INFILE\n' - '\n' - 'options:\n' - ' -D DPI\n' - ' -o OUTFILE\n' - ' -m\n' - ' -v\n' - ' --help\n' - ' --version') - -def main(): - # Process command line options. - global verbose - dpi = None - outfile = None - modified = False - import getopt - opts,args = getopt.getopt(sys.argv[1:], 'D:o:mhv', ['help','version']) - for o,v in opts: - if o in ('--help','-h'): - print __doc__ - sys.exit(0) - if o =='--version': - print('latex2png version %s' % (VERSION,)) - sys.exit(0) - if o == '-D': dpi = v - if o == '-o': outfile = v - if o == '-m': modified = True - if o == '-v': verbose = True - if len(args) != 1: - usage() - sys.exit(1) - infile = args[0] - if dpi and not dpi.isdigit(): - usage('invalid DPI') - sys.exit(1) - if outfile is None: - if infile == '-': - usage('OUTFILE must be specified') - sys.exit(1) - outfile = os.path.splitext(infile)[0] + '.png' - # Do the work. - latex2png(infile, outfile, dpi, modified) - # Print something to suppress asciidoc 'no output from filter' warnings. - if infile == '-': - sys.stdout.write(' ') - -if __name__ == "__main__": - try: - main() - except SystemExit: - raise - except KeyboardInterrupt: - sys.exit(1) - except Exception, e: - print_stderr("%s: %s" % (os.path.basename(sys.argv[0]), str(e))) - sys.exit(1) |