Use locl OpenType feature?

[frankrolf]

I am testing OT features in DrawBot, and I’m noticing that the locl feature does not seem to be supported. For a given font with locl feature included, it is not listed in listOpenTypeFeatures(my_font), also language tagging does not seem to affect the text in that regard.

Would it be possible to access the locl feature somehow?

[frederik]

use language('nl') to switch between languages, as DrawBot is typesetting environment...

font('/Users/frederik/Downloads/source-code-pro-2.030R-ro-1.050R-it/OTF/SourceCodePro-Regular.otf')

char = "б"

fontSize(200)
text(char, (10, 100))

language("sr")
text(char, (150, 100))