- From: John Daggett <jdaggett@mozilla.com>
- Date: Tue, 24 Aug 2010 20:04:49 -0700 (PDT)
- To: Vladimir Levantovsky <Vladimir.Levantovsky@MonotypeImaging.com>
- Cc: John Hudson <tiro@tiro.com>, WOFF Working Group <public-webfonts-wg@w3.org>
> Just to clarify - the OFF conformance levels (defined by ISO/IEC > 14496-4 / AMD26) are designed in the way that allow different > implementations pick and choose the desirable functionality. There are > five levels that (simplified for brevity) define the following sets of > features: > > level 1 - supported for unhinted TTF outlines; > level 2 - support for hinted TTF outlines; > level 3 - support for CFF outlines; > level 4 - support for embedded bitmaps; > level 5 - support for advanced text layout features. > > Implementations can claim conformance to a set of different levels > (e.g. implementation that offer full support for TTF with advanced > features would claim conformance with levels 2,4 and 5). Hmmm, interesting. So the "level" isn't really a level but a subset of the full OFF feature set? For WOFF, I think the natural target would seem to be levels 1 and 3. CSS3 Fonts would require level 5 in addition. I don't think requiring bitmap font support makes sense and hinted TTF outlines aren't supported on OSX (depending I guess on the exact definition of conformance). Regards, John Daggett
Received on Wednesday, 25 August 2010 03:05:23 UTC