diff options
Diffstat (limited to 'src/pikepdf/jbig2.py')
| -rw-r--r-- | src/pikepdf/jbig2.py | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/src/pikepdf/jbig2.py b/src/pikepdf/jbig2.py index 026b2ab..87f8550 100644 --- a/src/pikepdf/jbig2.py +++ b/src/pikepdf/jbig2.py @@ -25,7 +25,14 @@ def extract_jbig2( global_path = Path(tmpdir) / "global" output_path = Path(tmpdir) / "outfile" - args = ["jbig2dec", "-e", "-o", os.fspath(output_path)] + args = [ + "jbig2dec", + "--embedded", + "--format", + "png", + "--output", + os.fspath(output_path), + ] # Get the raw stream, because we can't decode im_obj - that is why we are here # (Strictly speaking we should remove any non-JBIG2 filters if double encoded) @@ -45,6 +52,35 @@ def extract_jbig2( return im +def extract_jbig2_bytes(jbig2: bytes, jbig2_globals: bytes) -> bytes: + with TemporaryDirectory(prefix='pikepdf', suffix='.jbig2') as tmpdir: + image_path = Path(tmpdir) / "image" + global_path = Path(tmpdir) / "global" + output_path = Path(tmpdir) / "outfile" + + args = [ + "jbig2dec", + "--embedded", + "--format", + "png", + "--output", + os.fspath(output_path), + ] + + # Get the raw stream, because we can't decode im_obj - that is why we are here + # (Strictly speaking we should remove any non-JBIG2 filters if double encoded) + image_path.write_bytes(jbig2) + + if len(jbig2_globals) > 0: + global_path.write_bytes(jbig2_globals) + args.append(os.fspath(global_path)) + + args.append(os.fspath(image_path)) + + run(args, stdout=DEVNULL, check=True) + return output_path.read_bytes() + + def jbig2dec_available() -> bool: try: proc = run(['jbig2dec', '--version'], stdout=PIPE, check=True, encoding='ascii') |