Re: [Freetype] font catalog

[Brian Stell]

Antoine Leca wrote:
> ...
> 
> Brian, is it possible to redo your test, but instead of discarding only
> the space characters, you should discard private use characters and
> the other undefined characters (like D800-DFFF or FFFE), 

Another strategy would be to not check the private user chars but use
what ever is there. That way a user could build their own font and
the browser would display it.

>  - unlike the other Unicode characters, private use characters do not
>   have assigned meaning, so the glyph from a different font is not
>   generally substitutable.

Probably should modify the glyph fill-in code to not fill in 
characters in this range.

> ... if you try to render say Chinese with this 
> font, you might well end with blank glyphs. What happen is that 
> this font has a OS/2 map, and this map indicates "Japanese, but 
> not Chinese". As a result, when displaying Chinese, IE unselects 
> this font and instead, select a replacement font with all the 
> needed characters.

This strategy only works when there is a good selection of fonts.
Definitely not true in the average X system. IE can guarantee a
good set of fonts because it has automatic font download available.

-- 
Brian Stell
mailto:address@hidden