[HarfBuzz] Quick show of hands needed

[Butrus Damaskus]

> I believe what Behdad means is:
>
> for decomposition: if HB is faced with the task of rendering U+0958 but the
> font doesn't provide that glyph, then should HB try to decompose it to
> U+0915 and U+093C and render the sequence?

definitelly YES.

> for composition: (I'm not too sure about *this* one but) if HB has to render
> a decomposed sequence which has an equivalent precomposed character, should
> HB try to lookup the glyph for that precomposed character (as it may give
> proper placement of diacritic etc)?

a) if the font doesn't provide the accent (or any other char of the
decomposed sequence), I'd say YES
b) if not, I would say NO.

> I vote YES on both accounts. The former would be useful to present a
> meaningful rendering to the user and the latter would be useful for
> typographical finesse.
>