Introduce a fast path for PDF/A conversion that uses pikepdf to add
PDF/A structures directly (sRGB ICC profile and XMP metadata), then
validates with verapdf. If validation passes, skip Ghostscript entirely.
If validation fails or verapdf is unavailable, fall back to the existing
Ghostscript conversion path.
New files:
- src/ocrmypdf/_exec/verapdf.py: CLI wrapper for verapdf validator
- tests/test_verapdf.py: Test suite for new functionality
Modified:
- pdfa.py: Add speculative_pdfa_conversion() and helpers
- _pipeline.py: Add try_speculative_pdfa() function
- _pipelines/_common.py: Integrate speculative path into postprocess()
* Update URL for PDFMARK documentation
For reference, here is a link to the old PDF:
https://web.archive.org/web/20190806035303/https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/pdfmark_reference.pdf
It appears Adobe converted the PDF into a webpage-based document, the
wording seems to almost identical b/w the PDF and the website.
* Fix cross-references to JBIG2 page
* Fix links for Fedora + Arch + HEAD revision install
Fedora 39 has been released, and the package tracker no longer includes
a release overview for Fedora 37 hence why it was removed here.
Previously we included the
filename, which required Postscript to run with file access enabled. For
security, Ghostscript 9.28 enables ``-dSAFER`` and as such, no longer
permits access to any file by default. This fix is necessary for
compatibility with Ghostscript 9.28.
We use ASCII85 for a slightly more compact representation.
We no longer use Ghostscript to manage PDF metadata, instead
omitting the DOCINFO segment from the pdfmark file we generate.
Instead all of the relevant metadata code has been migrated to pikepdf,
and we use that API. This should be more consistent and fixes the
Ghostscript version-depedent quirks.
Also removes our python-xmp-toolkit dependency, except for
testing.
* Fix unreachable code
This fixes an issue reported by LGTM.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
* Remove unused imports
This fixes several recommendations from LGTM.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Ghostscript no longer supports UTF-16-BE-hex strings as a way of
supplying Unicode data in pdfmark so we have lost this functionality too:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=e997c6836d243ab37fe3a5f0d57974af95eb5eac
For users this means setting --title, --author, etc. will not work if gs
9.24 is installed, but if the file has existing metadata it might work.
For now we enforce police-state-strict ASCII, until there's time to
implement proper metadata editing. Relevant tests set to xfail.
Related to previous validation issue. If the /CreationDate had no
timezone, Ghostscript also creates invalid metadata. Work around this.
Also fix up PDF date decoding, and transcode dates to standardize them.
James R. Barlow
5HT2
Daniel LovegroveandGitHub
Kian-Meng AngandGitHub
fedeliallalineaandGitHub
James R. Barlow
Stefan Weilandjbarlow83