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Re: [css3-writing-modes] vertical font features

From: John Daggett <jdaggett@mozilla.com>
Date: Wed, 25 Apr 2012 19:09:40 -0700 (PDT)
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style@w3.org
Message-ID: <2046529977.185178.1335406180832.JavaMail.root@mozilla.com>
>From the revised version of section 5.1.1:

> For sideways characters in ‘mixed-right’ and ‘upright’ modes,
> vertical typesetting features are not used. However, if the
> font has features or alternate metrics meant to be enabled for
> sideways text that is typeset in vertical lines, those features
> and tables are used. 

This isn't quite right, especially the term "alternate metrics". 
Sideways runs are set using the horizontal metrics and the normal
set of features used for horizontal text runs. I think you may be
trying to refer to the proposal in Appendix C to add a new
feature, 'svrt', specific to sideways runs within vertical text
runs.  I would suggest either referring to it directly or
omitting it.

> In the ‘sideways’, ‘sideways-right’, and ‘sideways-left’ modes,
> text is typeset using horizontal font metrics and the normal
> set of features used for horizontal text runs. Vertical metrics
> and vertical glyph variations are not used. 

I think you could merge these two paragraphs and it would be clearer
and more succinct.

Cheers,

John Daggett
Received on Thursday, 26 April 2012 02:10:10 GMT

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