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https://issues.apache.org/jira/browse/FOP-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17737163#comment-17737163
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Rafael Witak commented on FOP-3136:
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Hi [~daveroxburgh],
thanks for your speedy work!
If the softmask.pdf were to be included in future versions of the library I'd
have to check with my superior if that is okay from a legal perspective...
> FOP PDF Images - Some PDFs produce Error in Acrobat Reader
> ----------------------------------------------------------
>
> Key: FOP-3136
> URL: https://issues.apache.org/jira/browse/FOP-3136
> Project: FOP
> Issue Type: Bug
> Reporter: Rafael Witak
> Priority: Major
> Attachments: p4.patch, resultA.pdf, resultB.pdf, resultC.pdf,
> softmask.pdf, sourceA.pdf, sourceB.pdf, sourceC.pdf
>
>
> Including some PDFs as external-document results in a PDF that produces an
> error in Acrobat Reader (but not in Chrome!). The error message reads
> "{*}There was an error processing a page. There was a problem reading this
> document{*} {*}(18).{*}" and after Ctrl-click on OK "{*}Expected a name
> object{*}{*}.{*}" is added. No page is visible.
> The issue can be traced back to FOP PDF Images and exists in all its versions
> >=2.6. Versions 2.5 and lower produce results that work.
> While the original PDFs do have some issues when checked with a tool like
> [pdfcpu|https://github.com/pdfcpu/pdfcpu/releases/tag/v0.4.0], others with
> similar issues don't produce the same error. The originals _can_ be opened by
> Adobe Reader without a problem.
> No ERROR or WARNING is logged. Searching on Google / Jira / the mailing list
> did not produce comparable problems.
> Due to the fact that I get the copyrighted PDFs as-is by the customer, I
> don't have much freedom in either changing them to work around the problems,
> or provide too many examples.
> Windows 10.0.19045 Build 19045
> Java 17
> FOP 2.8
> PDFBox 2.0.28
> PDF Images 2.8
> (Included are three example documents with their respective results.)
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