On Thu, 8 Aug 2019 00:33:47 +0000 Andrew Glass via Unicode <unicode@unicode.org> wrote:
> I agree and understand that accurate representation is important in > this case. It would be good to understand how widespread the issue is > in order to begin to justify the work to retrofit shaping with > normalization. The number of problematic strings may be small but the > risk of regression in this case might be quite large. Well, you could always reverse engineer HarfBuzz! Just a reminder though. You would be using a permutation of the canonical combining classes - for Tai Tham, U+1A60 should be treated as ccc=254, not ccc=0, and for Tibetan you would need to ensure that the vowels below (ccc=132) came before the vowels above (ccc=130). Richard.
