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Re: [css3-writing-modes] real vs. synthetic width glyphs

From: Koji Ishii <kojiishi@gluesoft.co.jp>
Date: Wed, 3 Jul 2013 00:07:20 -0400
To: John Daggett <jdaggett@mozilla.com>, www-style list <www-style@w3.org>
Message-ID: <CDF9CE0D.C841%kojiishi@gluesoft.co.jp>
I agree with fantasia's proposal she sent an hour before, it'd be great if
you could give us your opinion on it. To answer to your questions:

>Eh, what?!?  You told me yourself when you, Elika and I sat down
>and discussed this at the Mozilla Japan office last month that your
>implementation was using the hwid/twid/qwid features and scaling the
>result if necessary.  Using outline interpolation (Adobe MM, Apple
>Variation Axes) is total overkill here,

Sorry my words seem to be too terse. Yes, that's the current
implementation, but I'd like to keep possibility to improve rendering when
new technology appear or when I want to spend more time on this.

>I should also point out that implementating the Writing Modes spec
>already requires the use of OpenType features to get proper vertical
>alternates, so I don't see that requiring width variants is any
>additional burden on implementations.

Right, the vertical flow part of the spec requires the use of vertical
alternate glyphs, but it does not require specific font system. We ended
up adding OpenType 'vert' feature as an example because there were
confusions between 'vert' and 'vrt2', both of them are vertical alternate
glyphs, but use of 'vrt2' will break interoperability of glyph visual

As fantasia said, I'm good to add your algorithm as an example of a good
one. Is this reasonable?

>So I fail to see how you can assert that they *won't* be used in
>vertical text runs.  I think part of the problem is that you're
>talking to a select audience of publishers rather than the more
>general audience of web authors that will use this feature once the
>functionality of this spec is more widely implemented.

Yeah, you're right, I'm not asserting, guessing, and I'm not interviewing
much with web authors. I still guess there's not much needs, given
Word/Ichitaro/InDesign doesn't do this, and we don't hear any such
feedback against our public WD. If you have any good idea to assert it
more firmly to either way, that'd be great.

Received on Wednesday, 3 July 2013 04:07:53 UTC

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