Hi, I'm struggling with the problem of shaping mixed text. Say I have Thai and English text that I would like to shape. If I put all of it in a buffer, HarfBuzz chooses a shaper based on the first identifiable character, and then uses that shaper for the whole text. So "<thai><english>" gets shaped fine with the Thai shaper, but "<english><thai>" gets messed up because it is shaped with the default shaper.
I was trying to figure out how Pango does this, but found nothing yet. Is it possible to ask HarfBuzz to identify text runs inside a buffer (or some other way) that can be shaped with different shapers? If there was a call that would identify the script (and maybe writing direction) of each character in the input, then I could split the buffer at positions where these a different script is used. Thanks. -- Lóránt Pintér Developer at Prezi (http://prezi.com)
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