[HarfBuzz] 'mark' feature in myanmar
behdad at behdad.org
Thu Jul 18 11:21:40 PDT 2013
On 13-07-18 02:19 PM, Jonathan Kew wrote:
> Hey Behdad,
> In hb-ot-shape-complex-myanmar.cc, we have the code fragment
> * Note:
> * Spec says 'mark' is used, and the mmrtext.ttf font from
> * Windows 8 has lookups for it. But testing suggests that
> * Windows 8 Uniscribe is NOT applying it. It *is* applying
> * 'mkmk' however.
> if (hb_options ().uniscribe_bug_compatible)
> plan->map.add_feature (HB_TAG('m','a','r','k'), 0, F_GLOBAL);
> which disables the 'mark' feature in Uniscribe-compatible mode.
> However, AFAICT from my current testing, it looks like Uniscribe on Win8 *is*
> applying the 'mark' feature, and so this is resulting in tons of unwanted
> discrepancies when I try to compare stuff. (This is when testing with the
> mmrtext.ttf font from Windows 8.)
Interesting. IIRC we were getting 100% parity in February with that same
> Could you re-test and see whether you agree that 'mark' is now being applied
> by Uniscribe? (I wonder if there's been a fix in a Win8 update of some kind
> since we originally worked on this?) If so, we should remove this hack.
I will. I haven't opened my Windows laptop since the February hackfest. Will
see if an update changes it. Got a sample sequence with expected / current
Also, feel like asking MS people on the OpenType list?
More information about the HarfBuzz