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https://issues.apache.org/jira/browse/PDFBOX-5561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17681084#comment-17681084
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Tilman Hausherr edited comment on PDFBOX-5561 at 1/26/23 7:00 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 % The number one greater than the highest object number used in
this section
/Index [0 12990] % An array containing a pair of integers for each subsection
in this section. The first integer shall be the first object number in the
subsection; the second integer shall be the number of entries in the subsection
/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 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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