James R. Barlow
46a279a49a
The executor system was built around passing only a single argument to workers, which was always PageContext. For other tasks, all actual arguments were packed in a tuple, which meant we needed intermediate functions to unpack the tuple. The situation is now rationlized and resembles how Python handles argument passing to familiar multiprocessing tools.
52 lines
1.2 KiB
Python
52 lines
1.2 KiB
Python
# SPDX-FileCopyrightText: 2022 James R. Barlow
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# SPDX-License-Identifier: MPL-2.0
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"""Interface to jbig2 executable."""
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from __future__ import annotations
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from subprocess import PIPE
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from packaging.version import Version
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from ocrmypdf.exceptions import MissingDependencyError
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from ocrmypdf.subprocess import get_version, run
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def version() -> Version:
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return Version(get_version('jbig2', regex=r'jbig2enc (\d+(\.\d+)*).*'))
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def available():
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try:
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version()
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except MissingDependencyError:
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return False
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return True
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def convert_group(cwd, infiles, out_prefix, threshold):
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args = [
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'jbig2',
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'-b',
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out_prefix,
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'--symbol-mode', # symbol mode (lossy)
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'-t',
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str(threshold), # threshold
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# '-r', # refinement mode (lossless symbol mode, currently disabled in
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# jbig2)
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'--pdf',
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]
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args.extend(infiles)
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proc = run(args, cwd=cwd, stdout=PIPE, stderr=PIPE)
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proc.check_returncode()
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return proc
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def convert_single(cwd, infile, outfile, threshold):
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args = ['jbig2', '--pdf', '-t', str(threshold), infile]
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with open(outfile, 'wb') as fstdout:
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proc = run(args, cwd=cwd, stdout=fstdout, stderr=PIPE)
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proc.check_returncode()
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return proc
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