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https://issues.apache.org/jira/browse/PDFBOX-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15356869#comment-15356869
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Christopher Clark commented on PDFBOX-3405:
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Sadly, even this approach is difficult. PDFTextStreamEngine uses private fields
when it builds TextPosition objects, so I can't just copy paste that code.
Further, I can't override "showGlyph" myself and then go back and then call
"super.showGlyph" since PDFTextStreamEngine is the grand parent of my class
(which extends PDFTextStripper), so I cannot invoke its methods.
As far as I can tell, the only recourse left is to copy paste the entire
PDFTextStripper class and then work from there.
> 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 {{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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