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Re: Mirroring Unicode symbols in Arabian

From: Khaled Hosny <khaledhosny@eglug.org>
Date: Wed, 20 Feb 2013 21:48:43 +0200
To: Paul Topping <pault@dessci.com>
Cc: Murray Sargent <murrays@exchange.microsoft.com>, Neil Soiffer <neils@dessci.com>, Kent Karlsson <kent.karlsson14@telia.com>, David Carlisle <davidc@nag.co.uk>, Daniel Marques <dani@wiris.com>, "www-math@w3.org" <www-math@w3.org>
Message-ID: <20130220194843.GA17876@khaled-laptop>
Almost all browsers these days do support OpenType and even allow user
control over features (using CSS).

Regards,
Khaled

On Wed, Feb 20, 2013 at 07:07:20PM +0000, Paul Topping wrote:
> If access to these characters requires use of this OpenType feature,
> does it imply that such characters will not be accessible from
> applications that simply process Unicode text strings (eg, web
> browsers and most other apps)?
> 
> Paul
> 
> > -----Original Message-----
> > From: Khaled Ghetas [mailto:dr.khaled.hosny@gmail.com] On Behalf Of
> > Khaled Hosny
> > Sent: Wednesday, February 20, 2013 9:34 AM
> > To: Murray Sargent
> > Cc: Neil Soiffer; Kent Karlsson; David Carlisle; Daniel Marques; www-
> > math@w3.org
> > Subject: Re: Mirroring Unicode symbols in Arabian
> > 
> > Right, that is is more or less the what is OpenType specification is
> > saying, and indeed XITS Math should be fixed to follow the
> > specification
> > (it was done that way to simplify testing since the system I was using
> > wasn't applying the Bidi algorithm).
> > http://www.microsoft.com/typography/otspec/TTOCHAP1.htm#ltrrtl
> > 
> > On Wed, Feb 20, 2013 at 04:35:54PM +0000, Murray Sargent wrote:
> > > I think that mirrored characters than don't have a mirrored character
> > > counterpart should be accessed by the 'rtlm' OpenType feature. But
> > > those that do have a mirrored character counterpart should not use
> > the
> > > 'rtlm' feature since else they'll get remirrored when shaped. This is
> > > the approach I used in my RTL math zone prototype for MathML 3. I
> > have
> > > a special copy of Cambria Math with 'rtlm' features for various
> > > operators such as integrals and summations. The approach works well.
> > > The font isn't complete enough though for more than just prototyping.
> > >
> > > Murray
> > >
> > > Khaled Ghetas noted:
> > >
> > > XITS Math fonts has mirrored math characters, but they are accessible
> > > only with 'rtlm' OpenType feature (but it is possible to build a
> > > special version of it with the RTL glyphs as the default).
> > > https://github.com/khaledhosny/xits-math
> 
Received on Wednesday, 20 February 2013 19:49:30 GMT

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