W3C home > Mailing lists > Public > www-svg@w3.org > May 2012

Re: should we remove the kerning property in favour of font-kerning?

From: Cameron McCormack <cam@mcc.id.au>
Date: Thu, 31 May 2012 22:35:20 +1000
Message-ID: <4FC76588.80104@mcc.id.au>
To: David Dailey <ddailey@zoominternet.net>
CC: 'Erik Dahlstrom' <ed@opera.com>, 'John Daggett' <jdaggett@mozilla.com>, 'Dirk Schulze' <dschulze@adobe.com>, 'Nikolas Zimmermann' <zimmermann@kde.org>, 'SVG public list' <www-svg@w3.org>
David Dailey:
> In addition to the cases that Cameron found on the web, we also have
various instructional materials that were written relying on the spec
including books and other materials such as
http://www.w3.org/Graphics/SVG/IG/resources/svgprimer.html#text . Future
authors will be using kerning since that is what the spec said and hence
what the instructional materials say.

Luckily that primer is on a web site that should be easy to update.

> Losing the ability to do character by character kerning, which
apparently is included in the proposal to deprecate would represent a
step backward for authors abilities to mimic effects used in advertising
and logos and, accordingly, for accessibility, by forcing authors to use
bitmaps instead of fonts to convey stylistic effects such as in
http://cs.sru.edu/~ddailey/svg/GeometricAccessibility.html -- the world
is replete with such examples, I believe. Allowing CSS to dictate the
terms for SVG graphics harms accessibility, art and sensibility.

Note that you won't lose the ability to manually control the kerning of 
glyphs -- you will be able to use the letter-spacing property to specify 
any additional offset to use between glyphs, and the font-kerning 
property to turn off automatic kerning (based on information in the 
font).  Yes, you would need to wait until the font-kerning property is 
implemented, but currently the kerning property is not widely supported 
and so authors cannot current rely on it.  (Also of course you can 
manually position each individual glyph, ignoring the craziness of 
specifying positions by characters in the DOM rather than per glyph from 
the font.)
Received on Thursday, 31 May 2012 12:36:26 UTC

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