Re: [Render] OpenType support in Pango

[Pablo Saratxaga <pablo mandrakesoft com>]

Kaixo!

On Thu, Dec 21, 2000 at 07:24:02PM -0800, Brian Stell wrote:
 
> > This is currently only handling GSUB (contextual variants and
> > ligatures) though most of the GPOS code is there and just needs to be
> > hooked up and tested/debugged.
> 
> Do you intend to draw each (vertically) positioned character with a
> separate draw call?

Doing that for all glyphs would be quite a waste of ressources (as for most
of them there wouldn't be really visible differences); however, there is
a set of glyphs for which it would make a *big* difference to do so: the
glyphs corresponding to combining chars (cf the discussions about Thai support
some time ago; a way it is handled currently is with extra glyphs and an
algorithm to pick the right one depending on previous chars; however an OT
font could provide only one glyph and info for placement of it depending
on context)

> Should we consider an API that allows an app to pass an array of positions
> along with the data?
> 
> This would be useful for line justification as well.
> 
> Brian Stell

-- 
Ki ça vos våye bén,
Pablo Saratxaga

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