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Convert a LaTeX equation into EPS and PNG with Python
import os
import os.path as op
from pathlib import Path
import shutil
import subprocess
import tempfile
from IPython.lib.latextools import genelatex
def latex_to_image(latex, eps_path):
eps_path = op.realpath(eps_path)
with tempfile.TemporaryDirectory() as tmpdir:
tmpfile = os.path.join(tmpdir, "tmp.tex")
dvifile = os.path.join(tmpdir, "tmp.dvi")
psfile = os.path.join(tmpdir, "tmp.ps")
pdffile = os.path.join(tmpdir, "tmp.pdf")
epsfile = os.path.join(tmpdir, "tmp.eps")
pngfile = os.path.join(tmpdir, "tmp.png")
contents = list(genelatex(latex, False))
with open(tmpfile, "w") as f:
f.writelines(contents)
with open(os.devnull, 'w') as devnull:
try:
subprocess.check_call(
["latex", "-halt-on-error", tmpfile], cwd=tmpdir,
stdout=devnull, stderr=devnull)
except Exception as e:
print("************")
print(len(contents))
print('\n'.join(contents))
raise(e)
subprocess.check_call(
["dvips", dvifile, "-o", psfile], cwd=tmpdir,
stdout=devnull, stderr=devnull)
subprocess.check_call(
["gs",
"-o",
pdffile,
"-dNoOutputFonts",
"-sDEVICE=pdfwrite",
"-dEPSCrop",
psfile,
], cwd=tmpdir,
stdout=devnull, stderr=devnull)
subprocess.check_call(
["pdf2ps", pdffile], cwd=tmpdir,
stdout=devnull, stderr=devnull)
subprocess.check_call(
["ps2eps", psfile], cwd=tmpdir,
stdout=devnull, stderr=devnull)
subprocess.check_call(
["dvipng", "-T", "tight", "-x", "6000", "-z", "9",
"-bg", "transparent", "-o", pngfile, dvifile], cwd=tmpdir,
stdout=devnull, stderr=devnull)
shutil.copy(epsfile, eps_path)
shutil.copy(pngfile, Path(eps_path).with_suffix('.png'))
if __name__ == '__main__':
latex_to_image(r'$$\sum_{n=1}^{+\infty} \frac{1}{n^2} = \frac{\pi^2}{6}$$',
'zeta2.eps')
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