[XeTeX] Charis SIL glyph variants

[Jonathan Kew]

On 18 Nov 2008, at 12:20, Will Robertson wrote:

> On 18/11/2008, at 10:24 PM, Jonathan Kew wrote:
>
>> Yes - the interface is a lot like that for AAT features, with the  
>> font
>> providing human-friendly names. They also have underlying numeric  
>> IDs,
>> but there's no general "registry" of these, like there is for (some)
>> AAT features. I presume the feature IDs are consistent across the
>> various extended-Latin fonts from SIL, for instance, but beyond  
>> that I
>> don't think you can assume anything. It's up to authors to specify  
>> the
>> names that their fonts support.
>
> That's what I feared. There shouldn't be a technical problem with
> supporting this, of course, but the lack of any sort of organisation
> scares me a little bit :)
>
> (I think the AAT method is best, where a back-end can query and set
> known features, but where the user interface at the font level is
> readable and extensible.)
>
> I should know this already...but is there an equivalent of OpenType-
> info.tex for Graphite fonts? Anything you've got lying around would
> make things easier for me... :)

Because the feature/setting interface looks the same, you can just run  
AAT-info, I believe (with the /GR option on the font name).

Charis SIL is a good font to try, as it supports Graphite as well as  
OpenType and AAT, but you'll see that the exact collection of features  
varies depending which rendering technology you use.

JK