On 15-7-2010 9:24, Khaled Hosny wrote:
In XITS I have stylistic sets (ss01-07) for accessing additional alphabets not bresent in Unicode, or variants of exising ones.
For example, ss01 maps the script alphabets to an alternate calligraphic one, so I did:
\starttext \setupbodyfont[xits] \ctxlua{fonts.otf.features.register_base_substitution('ss01')} \definefontfeature[ss01][mode=base,script=math,ss01=yes] $\addff{ss01}\cal ABCDEFG$ \stoptext
(I was not expecting \addff to work in math, but anyway).
This works, however, but I don't want to set the feature globally:
\starttext \ctxlua{fonts.otf.features.register_base_substitution('ss01')} \definefontfeature[math-text][mode=base,script=math,ss01=yes] \setupbodyfont[xits] $\cal ABCDEF$ \stoptext
math currently operates in base mode; what i can do is map it onto some private range; as the number of math fonts is small it's no big deal to keep either a list of features that provide this; we'd best cook up such a list in small committee also, context does math different than e.g. latex so having the glyphs in some well defined spot helps macro packages actually, since there are probably more symbols not in unicode, i think that we need to define some extensions ourselves in the private use area. so, to start with you need some 7 alphabets of 26 chars ? do you think that there will be more? for instance we can reserve 0xFE700-0xFE8FF 0xFE700 ss01 0xFE720 ss02 0xFE740 ss03 0xFE760 ss04 0xFE780 ss05 0xFE7A0 ss06 0xFE7C0 ss07 or we could even move to a much lower range (taco might know a good one); it does not matter much as we can define an offset @aditya & mojca: didn't we have some pending symbols as well? I do use some slots for some lm left-overs but there might be more. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------