Fonts and Canonical Equivalence

[Andrew West via Unicode]

On Sat, 10 Aug 2019 at 15:46, Richard Wordingham via Unicode
<unicode at unicode.org> 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 correctly when using
> > built-in Windows rendering.
>
> Does vowel above before vowel below yield a dotted circle?

Yes. Attached are screenshots for two real world examples, one which
is logically spelled as i + u, and one as u + i:

1. ཉིུ <0F49 0F72 0F74> [nyiu] as a contraction for ཉི་ཤུ [nyi shu] "twenty"

2. བཅིུག <0F56 0F45 0F74 0F72 0F42> [bcuig] as a contraction for
བཅུ་གཅིག [bcu gcig] "eleven"

Andrew
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