[HarfBuzz] Issue regarding chaining contextual substitution

[Behdad Esfahbod]

Hi Dohyun,,

On 03/17/11 08:32, Dohyun Kim wrote:
> Yes, I know that harfbuzz-ng does not provide Hangul Jamo shaping
> (ljmo, vjmo, tjmo) yet.
> However, this font has "calt" feature which is equivalent to ljmo + vjmo + tjmo.
> It seems that harfbuzz has invoked this calt feature for rendering;
> and the result was good to a large extent.

I can confirm your observation.  Given that Pango renders your sample
correctly, I'm guessing that adding compose/decompose logic to HarfBuzz will
fix this.  That said, I'd add a Hangul jamo shaper too.

Thanks,
behdad