[XeTeX] how to suppress doted circle next to a glyph

[David Jones]

U+1133E GRANTHA VOWEL SIGN AA has general category Mc (Spacing Combining Mark), which means it's expected to follow a base character to which it is attached (section section 2.11 of version 13 of the Unicode Standard).   In the absence of a base character, harfbuzz introduces the dotted circle, which is one of the options ('Show Hidden') mentioned in section 5.13 of the Unicode Standard.  If there's a way to switch to a different fallback method, such as 'Simple Overlap', I'd very much like to know what it is.

As a work around, you could try attaching it to an invisible character, for example \symbol{"00A0}\symbol{"1133E}, assuming the font you're using has U+00A0 NO-BREAK SPACE.  Other possibilities are U+2000 through U+200D, depending on availability.

Cheers,
David.
________________________________________
From: XeTeX <xetex-bounces+dmj=ams.org at tug.org> on behalf of François Patte <francois.patte at mi.parisdescartes.fr>
Sent: Friday, September 25, 2020 4:28 PM
To: xetex at tug.org
Subject: [XeTeX] how to suppress doted circle next to a glyph

Bonjour,

I want to use some glyph using the command \symbol. In some case I get a
glyph with a dotted circle, how can I get the glyph without this circle?

For instance, if I type \symbol{"1133E}, I get this as a result after
compilation:   𑌾    with a dotted circle before.

Is it possible to eliminate the circle? And how?

Thank you.

--
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. +33 (0)6 7892 5822
http://www.math-info.univ-paris5.fr/~patte
FSF
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