W3C home > Mailing lists > Public > www-style@w3.org > November 2006

Re: Rendering of Svg Font

From: Mike Bremford <mike-css@bfo.co.uk>
Date: Tue, 7 Nov 2006 09:05:00 +0000
Message-Id: <6E75B9FA-1E3D-40B4-BBDF-2025E0485681@bfo.co.uk>
To: www-style@w3.org

I know zip about SVG, but we've just been implementing Indic support  
and there's a lot more to it than just defining ligatures. Full  
support requires some fairly considerable pre-processing even before  
you start applying the rules in the GSUB and GPOS tables (I'm  
assuming Opentype fonts here).

> That would violate one of the accessibility principles of SVG, namely
> that simple text should be simple text.  Being in an Indic language
> doesn't make it non-simple in this context.

The shaping rules are well defined [2] and shouldn't require any  
additional info in the SVG to implement, just as they don't for HTML.  
However the text (in logical order) must be reordered and converted  
to glyphs by the SVG viewer using a shaping engine that handles Indic  
- Uniscribe on Windows, Pango on Linux. It sounds like that's not  
happening in this case.

Jose, I'm afraid either way you're on the wrong list, as this has  
nothing to do with CSS. It sounds like a bug in your SVG viewer/ 
plugin to me - I'd suggest contacting them.

[1] http://www.w3.org/TR/SVG/text.html#AlternateGlyphs
[2] http://www.microsoft.com/typography/OpenType%20Dev/indic/intro.mspx

Cheers... Mike
Received on Tuesday, 7 November 2006 09:05:24 UTC

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