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

["Christopher Clark (JIRA)" <ji...@apache.org>]

Christopher Clark created PDFBOX-3405:
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             Summary: Display font size
                 Key: PDFBOX-3405
                 URL: https://issues.apache.org/jira/browse/PDFBOX-3405
             Project: PDFBox
          Issue Type: Improvement
            Reporter: Christopher Clark
         Attachments: 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 getFontSizePt or getFontSize return seemingly very inaccurate results. For example, in the attached pdf the getFontSizePt 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 getFontSizePt 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) getFontSizePt includes the affect of using current transformation matrix
2) A new method like "getDisplayFontSize" is added that returns the font sizes 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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