FlateDecode+DCTDecode compressed images are essentially deflated JPEGs,
typically created by OCRmyPDF's optimizer. This change ensures pdfinfo
correctly identifies them and should_visible_page_image_use_jpg treats
them as JPEG-origin images, allowing JPEG output when appropriate.
Split the 1288-line info.py into smaller, single-responsibility modules:
- _types.py: Enums, type aliases, lookup dictionaries
- _contentstream.py: PDF content stream parsing, DPI calculation
- _image.py: ImageInfo class and image finding functions
- _worker.py: Concurrency/worker process handling
- info.py: PageInfo, PdfInfo classes (reduced to ~530 lines)
Public API unchanged - all existing imports continue to work.
Full message
eportlab/lib/rl_safe_eval.py:11: DeprecationWarning: ast.NameConstant is deprecated and will be removed in Python 3.14; use ast.Constant instead
haveNameConstant = hasattr(ast,'NameConstant')
Warning triggered by reportlab-4.0.7 and Python 3.12
Our method of getting data from pdfminer would silently consume a StopIteration
if pdfminer returned no processed pages, leading to odd error message.
We improve an error from pdfminer properly, and returning a more
descriptive error of our own.
It would be possible for ocrmypdf to repair the file before sending it to
pdfminer, but this seems to be rare enough that we won't do that yet.
While faster than Python based methods, we've outgrown the limited
amount of information Ghostscript provides with this feature, and it
repeats an analysis we have to do anyway to learn what images are
present.
James R. Barlow
James Barlow
James R. Barlow