Re: Glyph Bitmap Caching in FreeType

[David Turner]

Hi,

"Feinberg, Matthew" a écrit :
> 
> Ah, okay... now I understand.  For some reason I thought FreeType 2 was
> going to render entire strings.
> 
> This makes much more sense now.
> 
> How likely is it that you'll have a glyph caching component?  I was just
> about to have someone start working on adding glyph caching to our
> software, but if it's going to be available as an option component in
> FT2, then it seems a waste of time to duplicate effort...
> 
Well, it's not a priority currently. There are many ways to implement a
glyph cache, depending on what you really want to cache (bitmaps, pixmaps,
outlines ??), and how you want to refer them (by glyph index, character
code, other encodings ??)

I think we'll try to provide a generic solution, feel free to start developing
a glyph cache for your own package that is more suited to your needs. It's
probably something that will come after the OpenType Layout code anyway..

Unless of course you're ready to contribute some code too ;-)

- David

> --Matthew
> 
> -----Original Message-----
> From: David Turner [mailto:address@hidden
> Sent: Wednesday, March 08, 2000 9:20 AM
> To: Feinberg, Matthew
> Cc: FreeType Development (E-mail)
> Subject: Re: Glyph Bitmap Caching in FreeType
> 
> Hi again,
> 
> "Feinberg, Matthew" a écrit :
> >
> > I know that FreeType 1.x doesn't do any caching of glyph bitmaps.
> >
> > However, I understand that FreeType 2 will be able to render strings
> of
> > text rather than just individual glyphs.  If this is the case, does
> > FreeType 2 have some mechanism for caching glyph bitmaps, or does it
> at
> > least provide hooks so that the application may cache bitmaps?  Or am
> I
> > completely missing something major here...?
> >
> Actually, FreeType 2 itself will not be able to render string of texts,
> as it will still be a "font service". However, we'll very much probably
> provide some optional components in order to perform the following:
> 
>   - glyph caching
>   - advanced text layout (possibly through OpenType Layout)
> 
> It will be up to the client application to use these additional services
> to render text..
> 
> Hope it's clear :-)
> 
> - David
> 
> > --
> > Matthew A. Feinberg
> > Lead Programmer
> > Catharon Productions, Inc.
> > 2119 Route 66, Ghent, NY 12075, USA
> >
> > E-Mail:  address@hidden
> > Web:  http://www.catharon.com
> >
> > Tel: (518)392-9003
> > Fax: (518)392-6444