[XeTeX] Incorrect rendering of Vedic Sanskrit accents

Zdenek Wagner zdenek.wagner at gmail.com
Fri May 22 17:18:34 CEST 2015

Hi David,

as far as I understand rendering Devanagari fonts, this is handled by
the GPOS tables. I would therefore suspect a bug in the font that
should be reported to the font desogner. I do not know Snaskrit, I am
not able to judge whether the positions of Vedic accents are correct
or not. Could you try the same sample with other Devanagari fonts and
see what happends?
Zdeněk Wagner

2015-05-22 16:14 GMT+02:00 David M. Jones <dmj at dmj.ams.org>:
> I posted this to the XeTeX sourceforge tracker a couple of weeks ago,
> and it was suggested that I also mention it here.  The sourceforge
> ticket is
>     https://sourceforge.net/p/xetex/bugs/111/
> and the zip file is
>     https://sourceforge.net/p/xetex/bugs/111/attachment/xetex-indic-bug.zip
> Cheers,
> David.
> P.S. There's actually a third class of bug that is clearly visible in
> the table at the top of my document, but which I didn't mention
> explicitly: XeTeX won't typeset one of the Devanagari combining
> characters in isolation without adding a prothetic dotted circle
> (U+25CC).
> ===========================================================================
> On a lark, I've been experimenting with typesetting Vedic Sanskrit,
> specifically verses from the Ṛg-Veda, using the Murty Hindi font from
> Tiro Typeworks.  So far, XeTeX works beautifully, with two exceptions
> involving the Vedic udatta and anudatta accent marks:
> a) They don't attach properly to the Devanagari digits 1 and 3, and
> b) They don't combine properly with the candrabindu, anusvara, and
>    visarga signs.
> luaTeX does render these correctly, so it doesn't appear to be a
> problem with the font itself.
> I've included a zip file with a test file and sample output from
> luaTeX and XeTeX.
> Is this a bug, or am I missing something obvious?
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