[scribus] tone marks - first follow up (Peter Nermander)

[Andreas Vox]

> Date: Tue, 21 May 2013 14:13:24 +0200
> From: Peter Nermander <peter at nermander.se>
> To: scribus at lists.scribus.net
> Subject: [scribus]  tone marks - first follow up
> Message-ID:
> 	<CAODejytMCiZ0uA6J-
> bT9gOu73Pq9o9YBBAr3jASvsKAPev1dqw at mail.gmail.com>
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> 
> > Rolf, are you saying that there is no way, that present-generation
> > Scribus can handle combining characters properly?
> 
> >From what I understand: No.
> 
> Currently Scribus places glyphs one at a time on the canvas and Scribus
does
> not support placing one glyph on top of another to combine them.
> 
> I also think that is in line with unicode: Each glyph used should have
it's own
> code. How would otherwise things like sorting work?
> 
> /Peter

Unicode defines its own collation rules which handle composed characters.

Currently Scribus does not support all features of OpenType fonts. These
include:

* no GPOS tables other than kerning
* no GSUB tables including stylistic alternates, ligatures and combined
characters
* no glyphs without a Unicode codepoint
* no layout tables

These restrictions are quite severe and creating a specialized font as a
workaround
will not always solve the problem. The solution is to include Harfbuzz or
another 
OTF rendering library into Scribus, but that's not easy.

/Andreas