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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (Jira)" <ji...@apache.org> on 2023/01/26 18:57:00 UTC
[jira] [Comment Edited] (PDFBOX-5561) qpdf shows warnings trying to linearize file modified by PDFBOX
[ https://issues.apache.org/jira/browse/PDFBOX-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17681084#comment-17681084 ]
Tilman Hausherr edited comment on PDFBOX-5561 at 1/26/23 6:56 PM:
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From looking at the source code of qpdf, "reported number of objects" is /Size . The other one is the highest object number, which includes deleted objects.
https://github.com/qpdf/qpdf/blob/main/libqpdf/QPDF.cc
{noformat}
<<
/Length 39596
/ID [<3332E8C840564462886D36D08BED58A0> <8E1FABB3067A4553A2E4CE0BB4292802>]
/Info 7 0 R
/Root 1 0 R
/Type /XRef
/Size 12991
/Index [0 12990]
/W [1 3 0]
/Filter /FlateDecode
>>
{noformat}
was (Author: tilman):
From looking at the source code of qpdf, "reported number of objects" is /Size . The other one is indeed the highest object number, which includes deleted objects.
https://github.com/qpdf/qpdf/blob/main/libqpdf/QPDF.cc
{noformat}
<<
/Length 39596
/ID [<3332E8C840564462886D36D08BED58A0> <8E1FABB3067A4553A2E4CE0BB4292802>]
/Info 7 0 R
/Root 1 0 R
/Type /XRef
/Size 12991
/Index [0 12990]
/W [1 3 0]
/Filter /FlateDecode
>>
{noformat}
> qpdf shows warnings trying to linearize file modified by PDFBOX
> ---------------------------------------------------------------
>
> Key: PDFBOX-5561
> URL: https://issues.apache.org/jira/browse/PDFBOX-5561
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.27
> Reporter: menteith85
> Priority: Minor
>
> I have a PDF file* that is generated by a software other than PDFBox. When the PDF is modified by code given below using PDFBOX, *qpdf* shows the following warning:
> {code:java}
> WARNING: modified.pdf: reported number of objects (12991) is not one plus the highest object number (12989)
> qpdf: operation succeeded with warnings; resulting file may have some problems{code}
> Note the warning is not shown when *qpdf* analyses original pdf file (ie. pdf not modified by PDFBox).
> Here's the code to modify PDF in question:
>
> {code:java}
> for (final PDPage page: document.getPages()) {
> page.getAnnotations().forEach(annotation - > {
> if (annotation instanceof PDAnnotationLink link) {
> final PDPageXYZDestination destination = new PDPageXYZDestination();
> destination.setPage(document.getPage(1));
> final PDActionGoTo action = new PDActionGoTo();
> action.setDestination(destination);
> link.setAction(action);
> }
> });
> } {code}
>
> I forgot to mention that the result file generated by PDFBox is almost as twice as big as the original one.
> *I've sent the file to Tilman Hausherr.
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