On Sat, Jun 25, 2016 at 12:00:55PM -0400, Kelvin Ma wrote: > On Sat, Jun 25, 2016 at 8:57 AM, Khaled Hosny <[email protected]> wrote: > > > On Fri, Jun 24, 2016 at 10:06:07PM -0400, Kelvin Ma wrote: > > > How do you set the initial cluster value? So that harfbuzz will start > > > counting from some number like 25 instead of 0. > > > > Use hb_buffer_add(), or just do 25 + cluster in your code. > > > > > Also what’s the point of > > > *item_offset* and *item_length* in the buffer_add functions? > > > > It is explained in the documentation: > > > > http://behdad.github.io/harfbuzz/harfbuzz-Buffers.html#hb-buffer-add-codepoints > > > > > So you have to add the text to the buffer one letter at a time? That could > get very slow with python loops and function calls
Use the other method then. > > > 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. > 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? Regards, Khaled _______________________________________________ HarfBuzz mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/harfbuzz
