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https://issues.apache.org/jira/browse/PDFBOX-6154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18055422#comment-18055422
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Tilman Hausherr commented on PDFBOX-6154:
-----------------------------------------
shiftAndFill() has a bug, it divides negative numbers by 256 twice instead of
once. And it isn't needed at all, the ">>" of java does the job that ">> A"
does according to the specification
{quote}If V1 and V2 are two integers, then V1 >> A V2 is the value obtained by
shifting the value of V1 rightward by V2 bits, filling the leftmost V2 bits of
the new value with 0 if V1 is non-negative and 1 if V1 is negative.
{quote}
> HENABLESKIP isn't supported
> ---------------------------
>
> Key: PDFBOX-6154
> URL: https://issues.apache.org/jira/browse/PDFBOX-6154
> Project: PDFBox
> Issue Type: Sub-task
> Components: JBIG2
> Affects Versions: 3.0.4 JBIG2
> Reporter: Tilman Hausherr
> Priority: Minor
> Attachments: 1769433802492.png
>
>
> This is described in "6.6.5.1 Computing HSKIP". I managed to implement the
> bitmap but not yet to do anything with it. Until this is fully implemented we
> should throw an IOException instead of letting an IOOB happen.
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