Re: Embedded fonts + generic font families

> But I'm willing to consider use cases for allowing it. I just can think
of a good one. If you are going to provide a font resource you can give
> it any family name, so what is the need to override a generic family name?

Say the author wishes to both specify a generic font family
(proportionalSansSerif) and include the actual font file used at authoring
(Arial).

(a) the author can specify tts:fontFamily="Arial,default" and embed Arial
(b) the author can specify tts:fontFamily="default" and embed Arial such
that it aliases to 'default'

(a) is supported today, and (b) is ambiguous today and the the proposal is
to forbid it. Did I get this right?

Best,

-- Pierre

On Thu, Jan 24, 2019 at 6:51 AM Glenn Adams <glenn@skynav.com> wrote:

> Correct. That is my assumption. But I'm willing to consider use cases for
> allowing it. I just can think of a good one. If you are going to provide a
> font resource you can give it any family name, so what is the need to
> override a generic family name?
>
> On Thu, Jan 24, 2019 at 7:31 AM Pierre-Anthony Lemieux <pal@sandflow.com>
> wrote:
>
>> Hi Glenn,
>>
>> Your conclusion is that tts:fontFamily="proportionalSerif" is always
>> implementation-dependent and cannot be overridden by the author?
>>
>> Best,
>>
>> -- Pierre
>>
>> On Thu, Jan 24, 2019 at 2:27 PM Glenn Adams <glenn@skynav.com> wrote:
>>
>>> I have (since around October) had the following note on my TODO list for
>>> filing issues against TTML2:
>>>
>>> + [SUBSTANTIVE] do not allow @family on font element to be
>>>
>>>  a <generic-family-name> (either unquoted or quoted);
>>>
>>> On Thu, Jan 24, 2019 at 2:08 AM Pierre-Anthony Lemieux <pal@sandflow.com>
>>> wrote:
>>>
>>>> Good morning/evening,
>>>>
>>>> Say the following is present in a TTML2 document:
>>>>
>>>>   <resources>
>>>>     <font family="default" range="u+20-7f,u+90-9f">
>>>>       <source src="http://example.com/fonts/default.otf"
>>>> type="font/otf"/>
>>>>     </font>
>>>>   </resources>
>>>>
>>>> In the following snippet, is a presentation processor expected to use
>>>> the embedded font, or is the font selection sill left to the implementation?
>>>>
>>>> <p tts:fontFamily="default">font above or application-selected?</p>
>>>>
>>>> Best,
>>>>
>>>> -- Pierre
>>>>
>>>