60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
# © 2018 James R. Barlow: github.com/jbarlow83
|
|
#
|
|
# This file is part of OCRmyPDF.
|
|
#
|
|
# OCRmyPDF is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# OCRmyPDF is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with OCRmyPDF. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from functools import lru_cache
|
|
from subprocess import PIPE, run
|
|
|
|
from . import get_version
|
|
from ..exceptions import MissingDependencyError
|
|
|
|
|
|
@lru_cache(maxsize=1)
|
|
def version():
|
|
return get_version('jbig2', regex=r'jbig2enc (\d+(\.\d+)*).*')
|
|
|
|
|
|
def available():
|
|
try:
|
|
version()
|
|
except MissingDependencyError:
|
|
return False
|
|
return True
|
|
|
|
|
|
def convert_group(*, cwd, infiles, out_prefix):
|
|
args = [
|
|
'jbig2',
|
|
'-b',
|
|
out_prefix,
|
|
'-s', # symbol mode (lossy)
|
|
# '-r', # refinement mode (lossless symbol mode, currently disabled in
|
|
# jbig2)
|
|
'-p',
|
|
]
|
|
args.extend(infiles)
|
|
proc = run(args, cwd=cwd, stdout=PIPE, stderr=PIPE)
|
|
proc.check_returncode()
|
|
return proc
|
|
|
|
|
|
def convert_single(*, cwd, infile, outfile):
|
|
args = ['jbig2', '-p', infile]
|
|
with open(outfile, 'wb') as fstdout:
|
|
proc = run(args, cwd=cwd, stdout=fstdout, stderr=PIPE)
|
|
proc.check_returncode()
|
|
return proc
|