Re: Industry Thai Cell-Clustering Rules

[Owen Taylor <otaylor redhat com>]

Robert Brady <robert suse co uk> writes:

> On Fri, 3 Nov 2000, Chookij Vanatham wrote:
> 
> > ] Can't those be detected somehow ? (it would be interesting to have the
> > ] list of combinations and the codepoints assigned to the precombined glyphs)
> > 
> > Not quite sure about the question, give me more detail.
> 
> Pango shapers can "probe" fonts to see if they have certain glyphs.
> 
> They can also do y adjustments on glyphs.  It would be quite easy I guess
> to make a Thai renderer that could do nicely positioned vowels without
> needed extra glyphs for vowel-at-different-heights.

It's actually very difficult to do this (with X fonts) because you
don't know how much to adjust the y positions.

With a real font technology, this would be possible, but I think the
extra glyphs are probably a better way to handle things when
using X fonts.

Regards,
                                        Owen