[HarfBuzz] Intro to HarfBuzz

[Tom Hacohen]

<snip>
> so unless you'll pad with
> zero-width-space/zero-width-joiner/zero-width-non-joiner or something to
> keep the previous byte positions I won't be able to use the previous
> calculated BiDi data and will have to recalc.
Actually meant left to right and right to left marks and not the
joiners.
But I'm no Unicode expert anyway, that was just to explain my point.

--
Tom.