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From Andreas Lehmkühler (JIRA) <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-1001) TextPosition.getHeight() returns erroneous value for some PDFs
Date Mon, 04 Jul 2011 06:49:22 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-1001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13059335#comment-13059335
] 

Andreas Lehmkühler commented on PDFBOX-1001:
--------------------------------------------

Sorry, I missed the comment about the privacy of the pdf in question.

I guess the main problem is, that in most cases the vertical displacement is not the same
as the font height. These values are just mixed up. We have to add a separate value for the
height, which should take the font height (from the font itself) and the different scaling
factors into account.


> TextPosition.getHeight() returns erroneous value for some PDFs
> --------------------------------------------------------------
>
>                 Key: PDFBOX-1001
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-1001
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Text extraction
>    Affects Versions: 1.4.0, 1.5.0
>         Environment: Solaris, WinXP
>            Reporter: Emil Wacker
>
> For a PDF that worked fine under 1.2.1 the height value returned is negative and the
wrong value (i.e. using Math.abs()  won't fix it).  Other PDFs work fine.
> PDF Debug shows "Creator:Crystal Reports"  and "Producer:PDF-XChange (XCPRO30.DLL v3.30.0064)
(Windows 2k)"
> And when examining the 'Stream' items, the text is not what displays.
> Any suggestions on what to look for so that I can do differential analysis against other
PDFs to see what they do/not have in common with this one?
> (It's client data so I can't post the PDF. )
> It's stopping us from moving off 1.2.1  (and later versions fix another issue we have
of seeing question marks instead of the actual characters).

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