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Topic: Acrobat 7 AcroForm: Richtext Lineheights
Conf: (P-PDF) Developers, Msg: 138162
From: cyborg
Date: 8/18/2005 09:53 PM

Does anybody know, how AcroForm 7 computes Lineheights?

It is 1.2 * FontSize between two lines with same FontSizes, but it differs if the next line has different font size or font type

For most Fonts it is about:
FontSize(lastLine) = A
FontSize(thisLine) = B

(B-A) * 0.8 + 1.2 * A

but 0.8 is not exact, it differs from font to font, it has something to do with FontDescent, but I cant figure out how to calculate it properly.


Also, some fonts seem to be broken in Acrobat 7...


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