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Re: [css3-writing-modes] Examples of normal, unscaled glyphs work better than width-variant glyphs for text-combine-horizontal

From: John Daggett <jdaggett@mozilla.com>
Date: Mon, 23 Sep 2013 19:54:56 -0700 (PDT)
To: fantasai <fantasai.lists@inkedblade.net>
Cc: www-style@w3.org
Message-ID: <1827457655.208597.1379991296931.JavaMail.zimbra@mozilla.com>

fantasai wrote:

> John, as you review the text, please keep in mind that the UA
> is not required to use width variants if the TCY fits within
> 1em without their use. Your wording here:
>    > This example is inconsistent with the requirement to use
>    > width variants when they are available
> makes me think you are ignoring this fact.

As noted in my other post on this thread, in the vast majority of TCY
cases, the default glyphs do *not* fit within 1em.  When it does it's
often simply because the default glyphs *are* half-width glyphs, so
applying 'hwid' doesn't affect the result.  The cases where "measure
default glyphs, *then* apply width variations" gives different results
are generally restricted to the use of 'all' with specific content
such as 'ii'.

The example is problematic because it implies that variations may
often occur across implementations when, in fact, variations will only
occur it certain uncommon situations.


John Daggett
Received on Tuesday, 24 September 2013 02:55:24 UTC

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