[jira] [Resolved] (PDFBOX-3558) NPE in JBig2Filter if BitsPerComponent is missing

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-3558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr resolved PDFBOX-3558.
-------------------------------------
    Resolution: Fixed

> NPE in JBig2Filter if BitsPerComponent is missing
> -------------------------------------------------
>
>                 Key: PDFBOX-3558
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3558
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering, Utilities
>    Affects Versions: 1.8.12, 2.0.3
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>             Fix For: 1.8.13, 2.0.4, 2.1.0
>
>         Attachments: PDFBOX-3558.pdf
>
>
> From Erik Zeiske in the mailing list:
> {quote}
> I have an issue with PDFBox and the handling of a MRC Compressed PDF.
> The issue is related to the JBIG2 Compression used in the PDF. If I 
> try to extract the different Images used in the PDF attached, the 
> library throws an NullPointerException cause the Bits are not defined 
> in the JBIG2-Filter. I think this is because in the PDF there is no 
> "Bits per Component" defined in the JBIG2-Image. If I try to define 
> the Bits in the JAVA-Code the program runs without an error, but it 
> doesn't apply the JBIG2 mask properly to the foreground-colour-image 
> of the PDF. To fix this issue I tried to extract the mask into a file, 
> but it seems like the mask-image is the same as the foreground-image.
> I couldn't find the reason for this and I don't think it is related to 
> the PDF itself.
> {quote}
> I haven't understood all of this (maybe it is moot after the upcoming bugfix), but one thing is sure: an NPE is thrown if BitsPerComponent does not exist.
> Our code can only process bpc=1, so we can use that one as default.
> Edit: I've now understood the 2nd problem, it will be handled in PDFBOX-3559.



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