Hi,

I'm new to the webkit source code, and am looking for more specific information 
on exactly how fonts embedded with the @font-face attribute are positioned. I 
was unable to find anything useful in the archives.

Specifically:
- what font metrics from the actual font (ascent, descent, typo ascent, typo 
descent, etc..) are used, and how?
- where is the relevant code? I've found several references to libraries that I 
believe are related to font rendering (pango, skia, qt), and wanted to know 
where else I should look. I see some relevant code in RootInlineBox.cpp, for 
example.

I'm basically trying to come up with an exact formula for mapping the font's 
baseline or bounding box to the browsers screen. I'd really appreciate any 
advice that could get me started.

Thanks,
Bill
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