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https://issues.apache.org/jira/browse/PDFBOX-5766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17825175#comment-17825175
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Andreas Lehmkühler commented on PDFBOX-5766:
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How about simply ignoring hintmask and cntrmask as we don't support hinting at
all? The current implementation adds a hsbw command in some cases and it
re-adds some/all of the number values.
But I won't try that without a sample font/pdf
> CharStringCommand-mapping does not work for HintMask-cmd
> --------------------------------------------------------
>
> Key: PDFBOX-5766
> URL: https://issues.apache.org/jira/browse/PDFBOX-5766
> Project: PDFBox
> Issue Type: Bug
> Reporter: Dieter von Holten
> Priority: Minor
>
> i have a (proprietary) document with a licensed font. Opening it in PdfDebug
> shows some 'Unknown-command' messages.
> I could track it down (in glyph-handling) to some HintMask-command(19), which
> is followed by a mask-byte. The attempt to map this to a CharStringCommand
> fails, because it tries to lookup a 2-byte command. There doesn't seem to be
> a way to create a CharStringCommand with additional data.
>
> AddOn: the 'unknown command' log-message should be enhanced to actually show
> the 'unknown command'
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