[Devel] Cache and Metrics

[Glenn Peterman]

Using the cache FTC_ImageCache_Lookup, which is set to load just the outline
of a TT font, how can I determine the Ascent and Descent of a glyph?
If I use FT_Load_Glyph, it looks like I can get the info I want from the
GlyphSlot Metrics field. (horiBearingY is ascent and horiBearingY - height =
descent if height > horiBearingY)
Rendering will give me the info I want, but the size I am eventually going
to render at will not be held in the cache for long, so I don't want to
render while trying to determine a given string's limits.

Thanks,
Glenn Peterman