[jira] [Updated] (PDFBOX-3405) Display font size

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

     [ https://issues.apache.org/jira/browse/PDFBOX-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr updated PDFBOX-3405:
------------------------------------
    Fix Version/s: 2.1.0
                   2.0.3

> Display font size
> -----------------
>
>                 Key: PDFBOX-3405
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3405
>             Project: PDFBox
>          Issue Type: Improvement
>    Affects Versions: 2.0.2, 2.0.3, 2.1.0
>            Reporter: Christopher Clark
>             Fix For: 2.0.3, 2.1.0
>
>         Attachments: bad-font-2.pdf, bad-font-p1.pdf
>
>
> I (along with others) have found using the font size of text to be very useful when doing things like trying to recover the structure of PDFs. For example, in heuristics like 'text with large font sizes are probably titles'. However, I noticed a few cases where {{getFontSizeInPt}} or {{getFontSize}} return seemingly very inaccurate results. For example, in the attached pdf the {{getFontSizeInPt}} for the title text is over 500.
> After digging into this a little, as I understand it neither of these methods return the a font size scaled to the display space. {{getFontSize}} returns the "raw" encoded font size and {{getFontSizeInPt}} returns the font size scaled by the text matrix, but not by the current transformation matrix. 
> Basically, in order to get reliable font information, it would be helpful if either
> 1) {{getFontSizeInPt}} includes the effect of using the current transformation matrix
> 2) A new method like {{getDisplayFontSize}} is added that returns the font size scaled to the display space
> As a side note, I have seen several users (including myself), assume that {{getFontSize}} returns the font size as would be observed when one opens the PDF, and the been confused when these method occasionally do not return the results expected. I think {{getFontSize}} would benefit from a clear note that the results might not include scaling factors that were used when the text was rendered.



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