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https://issues.apache.org/jira/browse/PDFBOX-1778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13823591#comment-13823591
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Andreas Lehmkühler commented on PDFBOX-1778:
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IMHO the easiest solution is to change the internal representation of the float
to BigDecimal. Additionally we should save the value as string as well, so that
we don't have to do the conversion anymore.
> Rounding issue in generated PDF file
> ------------------------------------
>
> Key: PDFBOX-1778
> URL: https://issues.apache.org/jira/browse/PDFBOX-1778
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Signing
> Affects Versions: 1.8.3
> Reporter: vakhtang koroghlishvili
> Assignee: Andreas Lehmkühler
> Priority: Critical
> Fix For: 1.8.3, 2.0.0
>
> Attachments: extreme-values-red.pdf, extreme-values-red.png,
> extreme-values.pdf, extreme-values.png, original.pdf, saved.pdf
>
>
> We have PDF file which was signed by some other application.
> When we try to sign it with PDFbox, previous revision is damaged.
> We did some investigations and found such problem:
> (question on stackoverflow is here:
> http://stackoverflow.com/questions/19903884/pdf-document-is-modified-by-another-revision/19905271?noredirect=1#19905271
> )
> Some PDF tags are changed in new revisions.
> For example values of following tags:
> /WhitePoint
> /Gamma
> /Matrix
> are changed from values like this: 0.9505
> to values like this: 0.9505000114
> We think this is problem of converting float/double inside COSFloat.
> Following code just opens and saves PDF file and this operation changes
> values of mentioned text:
> public void saveTo(String sourceFile, String destFile) throws Exception{
> PDDocument doc = PDDocument.load(new FileInputStream(sourceFile));
> doc.save(new FileOutputStream(destFile));
> }
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