FW: [mpeg-OTspec] RE: font media types

suzuki toshiya mpsuzuki at hiroshima-u.ac.jp
Wed Apr 6 00:05:38 CEST 2011

Dear Vladimir,

In addition, it is possible to make a TrueType-like font
which includes both layout control tables for TrueType GX
tables (morx etc) and OpenType tables (GSUB etc). This is
very popular. I think most Dynalab fonts for CJK scripts
are such.

I heard that Apple implementation uses OpenType tables and
GX tables are ignored when such font is given (described
in FontForge document). Is it useful for the document package
producer to declare which layout tables are used during the
document production?


suzuki toshiya wrote:
> Dear Vladimir,
> I'm sorry for lated participation of this discussion.
> The distinction for TTF-only implementation is still significant,
> SC34 will think.
> In OOXML (ISO/IEC 29500, Microsoft Office XML), there is a boolean
> flag which had ever been used to distinguish TrueType font and
> various bitmap fonts. It is still excluding CFF OpenType from TrueType.
> Current OOXML spec does not clarify it, but future Corrigendum
> will clarify it.
> In addition, current Microsoft Office (2010) can embed TrueType
> into the document package, and cannot embed CFF OpenType. This
> situation is same in XPS, another ECMA standard. If I try to embed
> CFF OpenType into XPS, it is converted to bitmap picture.
> Also, the conformance level definition of OFF distinguishes CFF
> OpenType and glyf OpenType, it is consistent attitude for SC29/WG11
> to request different media types for them, I think.
> Regards,
> mpsuzuki
> Levantovsky, Vladimir wrote:
>> Forwarding to the AHG list on behalf of Chris Lilley
>> -----Original Message-----
>> From: Chris Lilley [mailto:chris at w3.org] 
>> Sent: Tuesday, April 05, 2011 5:01 PM
>> To: Thomas Phinney
>> Cc: Levantovsky, Vladimir; John Hudson; David Lemon; OTspec; Tab Atkins; Karsten Luecke
>> Subject: Re: [mpeg-OTspec] RE: font media types
>> On Tuesday, April 5, 2011, 10:12:44 PM, Thomas wrote:
>> TP> If you dropped explicit mention of having both outlines at once,
>> TP> you could just sy that OFF was a generic type that could have
>> TP> either kind of outlines. I think that is fine (and potentially
>> TP> useful under some circumstances). 
>> This is 
>> a) true
>> b) likley to result in the feedback that you need only one intertnet media type,application/font-off as this covders all the others
>> b) may not be desirable.
>> What is the current state of "supports TrueType but does not support OpenType, either because of the Type 1 glyph shapes or because of the extended language support options" implementations? Are they still significant?
>> If yes, then at minimum we need an internet media type that identifies TTF. If no, then we need to decide which of application/font-otf and application/font-off is more likely to succeed, as they mean the same thing.

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