[Date Prev][Date Next][Thread Prev][Thread Next][Thread Index]
RE: [XaraXtreme-dev] Font metrics and kerning update
- From: "Charles Moir" <CharlesM@xxxxxxxx>
- Date: Wed, 19 Apr 2006 18:01:41 +0100
- Subject: RE: [XaraXtreme-dev] Font metrics and kerning update
But without any caching does that mean we'd have to call Freetype during
display? That sounds a recipe for really slow text rendering.
Perhaps we do need a better, more smart cache that caches the kerning
pairs used (and it not limited to just 3 fonts). I wonder whether any
of our existing caches could be used for this. Although to be honest I
presume it should not be too difficult to create a basic kerning pair
> -----Original Message-----
> From: owner-dev@xxxxxxxxxxxxxxxx
> [mailto:owner-dev@xxxxxxxxxxxxxxxx] On Behalf Of Martin Wuerthner
> Sent: 19 April 2006 17:56
> To: dev@xxxxxxxxxxxxxx
> Subject: RE: [XaraXtreme-dev] Font metrics and kerning update
> In message
> "Charles Moir" <CharlesM@xxxxxxxx> wrote:
> > Does the 'uncached' comment suggest that kerning data is usually
> > cached in Camelot?
> Yes. The Windows code simply reads the complete kerning table
> from the font and stores it in a cache. The cache size is
> configured to be 3, so only 3 fonts can be cached at the same
> time, i.e., when the 4th is needed one previous entry is discarded.
> With FreeType, it is not possible to read the complete
> kerning table, and it might not be a good idea for a huge
> Unicode font anyway. It would still be possible to cache the
> kerning pairs (and it would probably be a good idea).