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https://issues.apache.org/jira/browse/PDFBOX-3745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15957378#comment-15957378
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Tilman Hausherr commented on PDFBOX-3745:
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The font has a /Width array that is too short. Lastchar is 119, but the "ä" is
higher. According to the PDF specification, in that case the value of
/MissingWidth is to be used. That one doesn't exist. Its default value is 0,
which coincidentally, is what works for this file (I tested that in debugging).
So I'll test what happens with our many test files if I change the code...
> Wrong character width
> ---------------------
>
> Key: PDFBOX-3745
> URL: https://issues.apache.org/jira/browse/PDFBOX-3745
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.5
> Environment: Windows 10
> Reporter: Ch. Schlatter
> Attachments: p421.jpg, p42.pdf, PDFBOX-3745-reduced.pdf
>
>
> I tried to convert a PDF file to an image. But there is a error with the
> character width computation. As you can see inside the blue box, there are
> gaps after every umlaut mark (ä ,ö ,ü). Some characters in the font doesn't
> contain any width information. The distance between the character is handled
> by position adjustment. For example:
> [1., -278, ), -844, H, -722, ä, -556, u, -611, sliche P, -667, f, -333, lege]
> TJ
> I guess there is an error in the font.getWidth() implementation. If I call
> font.getWidth("ä") it returns 556. (Instead of 0, what would fit)
> I attached the PDF and the converted image.
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