Re: [Freetype] Font & Glyph caching

[David Turner]

Eric Poulsen wrote:
> I'm developing an application that only (currently) needs to do metrics
> on fonts for layout purposes.  The app will not be rendering any text
> directly.
>
> I've written a class to cache fonts (load on demand), then I use 
> FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT ) to load a glyph, and
> measure it.
>
> My question: Do I need to glyph caching if I'm not rendering the
> glyphs?  
Well, you'll need to cache the metrics :-)

Either implement your own cache, or simply use the glyph cache even if
you only use the metrics..

Also, what kind of metrics do you need (expressed in font units, scaled,
hinted, etc...)

It's not possible to get the hinted metrics without loading the whole
glyph. But you could store it in other places for frequent re-use..

Regards,

- David Turner
- The FreeType Project  (www.freetype.org)