Hi Tobias,

On 03/12/2011, at 6:06, Tobias Schoel <[email protected]> wrote:

> As a teacher I can think of some more Applications. Of course, these are 
> pedagogical:
> 
> Teaching scripts to beginners (learning to write a primary school, learning 
> to write in a different script when learning another language (or even in the 
> same language: Mongol?):
> 
> You might want to color single parts of a glyph in order to highlight them. 
> So, for example in a handwritten (see 
> http://de.wikipedia.org/wiki/Schulausgangsschrift or english equivalents I 
> haven't found in the time) "a" the beginning or end-strokes might be colored.

Yes, but are these examples really requiring parts of the same whole character 
coloured differently?

Presuming that the font did allow access to individual glyphs, as if separate 
characters, then would not all meaningful aspects be equally well (if not 
better) encoded by an overlay?
That is, position a coloured version of the required glyph over the full 
character in monochrome.

In the pedagogical setting, you are presumably talking about the single stroke 
as a sub-part of the whole character, so it deserves to be placed as an entity 
in itself.
This is quite different to a colored diacritical mark modifying the meaning of 
a character.

> 
> Of course the font creator has to create sub-glyphs or other fancy stufff, 
> but XeTeX should allow (re)composition of the glyph with different colors.
> 
> bye
> 
> Toscho

Hope this helps,

       Ross


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