> > > > Don’t you > > > need > > > > context to be ignored if the boundaries of the text you want to shape > > > fall > > > > inside a cluster? Like in the string 'af[fluency s]tate' where only > the > > > > 'fluency s' is supposed to be shaped? > > > > > > Depends on why you are shaping “fluency s” alone, if it is because of, > > > say, font change, then you need HarfBuzz to know the context otherwise > > > you get broken Arabic shaping. > > > > Well font change would produce a separate run that wouldn’t know about > the > > other runs so context can only be within a same-direction, same-font run. > > This is wrong, font change shouldn’t break Arabic shaping, so you have > to pass the context even in this case. >
If the text consists of text strings separated by formating objects, each text string doesn’t know about what’s around it. Because that’s at a much higher level in the code and harfbuzz can only handle a single font in a single run at a time. To artificially jam in the neighboring runs for each shaping attempt would involve an inordinate amount of string concatenation and searching on the fly. > > > But would adding the context & using the start and finish indexes cause > > latin ligatures like fi to get shaped when they shouldn’t be is what I’m > > asking? > > No, they won’t, but why you would want to do that? > just asking to make sure > > Regards, > Khaled >
_______________________________________________ HarfBuzz mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/harfbuzz
