[Fontconfig] text string bounding box - top and bottom limits?

[mathog]

On 10-Oct-2012 15:42, mathog wrote:
> There are two cases too: boundary fits one particular string (box
> fits specific glyphs exactly) and the limit bounding box for the 
> whole
> font (bounding box height fits any characters in text).
>
> Where does one obtain these values?  I see FT_Glyph_Get_CBox() and
> assume it corresponds to one of these cases, but I'm not sure which
> one.

Tried it - FT_Glyph_Get_CBox() corresponds to the exact fit on the 
glyph.  So how does one find the
yMax,yMin limits for the font as a whole?  If it was just English one 
could feed in
an "M" and a "y", or something like that, but for a completely 
arbitrary language, where
the identity of the limiting y extent characters is not known ahead of 
time (by the programmer, if not
the end user)?

Thank you,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech