[XeTeX] rendering of U+0903

Zdenek Wagner zdenek.wagner at gmail.com
Tue Apr 14 15:33:00 CEST 2015

2015-04-14 15:17 GMT+02:00 Arthur Reutenauer <
arthur.reutenauer at normalesup.org>:

> > The problem is that AFAIK the Indic scripts are not yet implemented in
> > luatex.
>   Actually it is, at least for Devanagari.  This is fairly recent (2-3
> years).

I did not know about it, I asked Hans Hagen when preparing this book:

> >         The dotted ring is not a part of the glyph. the Unicode shaper
> > (HarfBuzz in XeTeX) knows that visarga is a dependent vowel (matra) and
> > since a consonant is missing, it takes the dotted ring from the font (it
> > should exist as a glyph per Microsoft's recommendation).
>   That's interesting, thanks for the explanation.  But Manfred doesn't
> want LuaTeX to produce the same output as XeTeX, he wants it the other
> way round.  What you're saying implies that it's not really possible
> with a conformant font.
> > I have quite a lot of texts in Hindi, if you develop such a shaper in
> lua,
> > I can offer testing.

I think it is rather a matter of a shaper. The dotted ring should be
present in the font and the shaper should place it instead of the missing
consonant. I understand the display of a single matra without anything
added is important in textbooks.

>   You should get in touch with Hans and others on the ConTeXt list.
>         Arthur

Zdeněk Wagner

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