RE: Item for discussion : referencing OFF conformance level

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).

Regards,
Vlad


> -----Original Message-----
> From: public-webfonts-wg-request@w3.org [mailto:public-webfonts-wg-
> request@w3.org] On Behalf Of John Hudson
> Sent: Tuesday, August 24, 2010 2:18 PM
> To: WOFF Working Group
> Subject: Item for discussion : referencing OFF conformance level
> 
> During the CSS3 Font Module session in LA last Wednesday, Tom Phinney
> (Extensis) and Adam Twardoch (Bitstream) suggested that it be a
> conformance requirement for WOFF user agents to be able to handle both
> TTF and CFF OpenType fonts. Vlad mentioned that the OFF spec includes
> multiple conformance levels in this regard, which gave me the idea that
> we might be able to reference one of these in the WOFF spec.
> 
> JH