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4bf13f473788e059fd53b35ee0c0e98a08e29dd9
Commit Graph
67 Commits
Author SHA1 Message Date
James R. Barlow 4bf13f4737 optimize: be less chatty 2018-04-17 23:25:41 -07:00
James R. Barlow 9e89b75186 Merge v6.1.5 2018-04-17 22:51:13 -07:00
James R. Barlow 0b10db91be Fix regression: Disable Ghostscript JPEG passthrough entirely 2018-04-17 17:00:24 -07:00
James R. Barlow 1a516b2af9 Fix regression: time stamp test suite failures 2018-04-17 16:59:21 -07:00
James R. Barlow 076363d78e Disable JPEG passthrough for Ghostscript 9.23 
Seems to corrupt JPEGs involved in image masks?
 2018-04-17 16:31:03 -07:00
James R. Barlow a620724d6a Fix PDF/A validation failure due to timezone being omitted from /ModDate 2018-04-17 15:16:48 -07:00
James R. Barlow 640b953ec7 Fix PDF/A validation failure due to timezone being omitted from /ModDate 2018-04-17 14:55:32 -07:00
James R. Barlow a009ca7597 Disable JPEG passthrough for Ghostscript 9.23 
Seems to corrupt JPEGs involved in image masks?
 2018-04-17 13:54:34 -07:00
James R. Barlow c974aec934 Search for image masks too 2018-04-17 02:06:08 -07:00
James R. Barlow 3033f03f64 Iterate images with pikepdf / fix mono PNG corruption 
To work around PNG corruption problem in PyMuPDF for monochrome images,
extract and save monochrome CCITT with synthetic TIFF header.

Works better but currently skips /ImageMask due to qpdf
implementation, which affects many files.
 2018-04-17 01:50:37 -07:00
James R. Barlow 72723e0bb5 optimize: be quieter 2018-04-16 18:06:02 -07:00
James R. Barlow 2fb6ab3939 Trap writePNG error 2018-04-16 17:29:10 -07:00
James R. Barlow 25c1c160b8 Move optimize to new file 2018-04-16 17:22:06 -07:00
James R. Barlow 7e92895471 Parallelize pngquant 2018-04-16 12:37:51 -07:00
James R. Barlow d291d48991 PNG palette: parse PDF string from leptonica instead 
Seems better to accept whatever leptonica rather than make detailed
assumptions about how it encodes the palette.

Experimented with setting FlateDecode on the palette but it seems to
expand it.
 2018-04-16 12:16:13 -07:00
James R. Barlow 0e6b8042b0 Implement PNG palettization 2018-04-16 11:18:52 -07:00
James R. Barlow 2482296e2b hocr: avoid division by zero 
Issue #253 - PDF that produces the error is not available, but if font_width
is zero, chances are the text is nonprinting characters, so suppress it.
 2018-04-14 17:24:21 -07:00
James R. Barlow f755fb76ee Try pngquant 2018-04-14 01:37:14 -07:00
James R. Barlow c61b5dcb62 Fix PDF/A validation error from setting /Predictor 0 2018-04-14 01:36:46 -07:00
James R. Barlow fae893b9d9 Reinstate transcoding of PNG 2018-04-14 00:19:24 -07:00
James R. Barlow e75b6280fd Try reading compressed data directly to see if Leptonica will add predictor 
Turns out it does not transcode at all in this case, so probably going
to revert to transcoding PNG -> PNG. However if pngquant or similar is
done, this API will still be useful.
 2018-04-13 23:55:23 -07:00
James R. Barlow 8c4023165a Release L_COMP_DATA properly 2018-04-13 23:53:41 -07:00
James R. Barlow b7d403f106 Deprecate Pix.read() behaving as an open function 2018-04-13 23:52:46 -07:00
James R. Barlow b069de0caa Use Leptonica to rewrite all PNGs with predictor 
Leptonica does a better job of encoding them than Ghostscript, about -15%.
For a test file 450k worth of
PNGs was reduced to 388k with no loss of quality.
 2018-04-13 16:35:50 -07:00
James R. Barlow 136da74bfa Update branch with v6.1.4 2018-04-13 12:57:21 -07:00
James R. Barlow 7fc897e6dc Fix NameError 'ghostscript' 2018-04-12 21:24:05 -07:00
James R. Barlow 9b731d63b8 Set Ghostscript -sColorConversionStrategy the way old/new versions expect 2018-04-12 16:28:48 -07:00
James R. Barlow 10aa59f674 v6.1.4 fix test suite regression with Ghostscript 9.23 2018-04-12 15:16:54 -07:00
James R. Barlow c95db246d4 v6.1.4 merge 2018-04-11 15:58:00 -07:00
James R. Barlow f6399eb90f optimize: use Leptonica to compact JPEGs 
Pillow could do it too, but Leptonica is somewhat more PDF aware.
 2018-04-10 17:45:05 -07:00
James R. Barlow 77f2448e59 Leptonica: add L_COMP_DATA compressed data manager 2018-04-10 17:44:03 -07:00
James R. Barlow 4b6153ad18 Use defusedxml for XML parsing when reading XMP 2018-04-10 14:25:13 -07:00
James R. Barlow 11b6f77df0 unpaper: close images on error paths 2018-04-09 13:05:12 -07:00
James R. Barlow db8b0319dd get_version: repeat system error messages if the process exists with a signal 2018-04-09 13:04:51 -07:00
James R. Barlow c9dd330766 JBIG2: refactor, don't recompress existing JBIG2 2018-04-09 13:04:10 -07:00
James R. Barlow e40228102c JBIG2: Streams created in this manner are already indirect objects 2018-04-06 17:11:17 -07:00
James R. Barlow 7889c6fb4c Parallelize JBIG2 execution with thread pools 2018-04-06 17:00:23 -07:00
James R. Barlow 6eb1773110 Fix JBIG2Globals included multiple times in output 2018-04-06 17:00:03 -07:00
James R. Barlow 1d25823746 Implement functional, single threaded optimize 
Passes verapdf
 2018-04-06 15:49:16 -07:00
James R. Barlow 709c01c7a1 Regroup three merge steps into a single step 
All take the same inputs and deliver similar outputs, so it makes sense.
 2018-04-06 01:07:02 -07:00
James R. Barlow 4a341c9034 Merge branch 'master' into feature/jbig2-2018 2018-04-05 21:29:39 -07:00
James R. Barlow be41ff6d54 Update flowchart 
[ci skip]
 2018-04-05 21:26:37 -07:00
James R. Barlow 753e6274ab Tell unpaper to use --layout none so it won't blank out multi column text 2018-04-05 02:14:33 -07:00
James R. Barlow d8ac6e28ab Convert monochrome images to JBIG2 
Awkwardly using fitz and pikepdf, transcode monochrome to CCITT.
This requires _OCRMYPDF_NO_FITZ=1.

00000x.opt.pdf can be checked for JBIG2 to confirm, but this file is
not passed to the output since it's not all wired up yet.
 2018-04-03 00:00:53 -07:00
James R. Barlow a95ffcdc46 Experimental add jbig2 
It appears that fitz forces conversion of jbig2 to ccitt no matter what,
so pikepdf will be needed to patch jbig2 images.
 2018-04-03 00:00:53 -07:00
James R. Barlow 1b01d45dd2 Warn about Python 3.5 page count issue 2018-04-02 19:29:17 -07:00
James R. Barlow 7a1cd39b21 Fix creation date metadata lost from input 
Closes #247
 2018-04-02 17:53:39 -07:00
James R. Barlow 90644a3017 pipeline: refactoring, use with block for images 2018-03-31 13:26:40 -07:00
James R. Barlow ace439910e Remove PyMuPDF 1.12.4 shim 2018-03-30 12:33:27 -07:00
James R. Barlow 7f038568de Add envvar to ease testing without PyMuPDF 2018-03-30 12:32:48 -07:00