Re: Fonts and Canonical Equivalence

2019-08-10 Thread Richard Wordingham via Unicode
On Sat, 10 Aug 2019 16:37:48 +0100 Andrew West via Unicode wrote: > On Sat, 10 Aug 2019 at 15:46, Richard Wordingham via Unicode > wrote: > > Does vowel above before vowel below yield a dotted circle? > > Yes. Attached are screenshots for two real world examples, one which > is logically spe

Re: Fonts and Canonical Equivalence

2019-08-10 Thread Andrew West via Unicode
On Sat, 10 Aug 2019 at 15:46, Richard Wordingham via Unicode wrote: > > > Just retested on Windows 10 with > > a Tibetan font that supports both sequences of vowels, and both > > sequences display correctly under Harfbuzz (as expected), but only > > vowel-below followed by vowel-above displays cor

Re: Fonts and Canonical Equivalence

2019-08-10 Thread Richard Wordingham via Unicode
On Sat, 10 Aug 2019 11:22:01 +0100 Andrew West via Unicode wrote: > On Sat, 10 Aug 2019 at 08:29, Richard Wordingham via Unicode > wrote: > > > > There are similar issues with Tibetan; some fonts do not work > > properly if a vowel below (ccc=132) is separated from the base of > > the consonant

Re: Fonts and Canonical Equivalence

2019-08-10 Thread Andrew West via Unicode
On Sat, 10 Aug 2019 at 08:29, Richard Wordingham via Unicode wrote: > > There are similar issues with Tibetan; some fonts do not work properly > if a vowel below (ccc=132) is separated from the base of the > consonant stack by a vowel above (ccc=130). It's not that the fonts don't work, it's that

Fonts and Canonical Equivalence

2019-08-10 Thread Richard Wordingham via Unicode
I've spun this question off from the issue of what the USE is to do when confronted with the NFC canonical equivalent of a string it will accept when this equivalent does not match its regular expressions when they are applied to strings of characters rather than canonical equivalence classes of st