What is the best way to work around the current USE CV+C limitation in Tai Tham?
Richard Wordingham via Unicode
unicode at unicode.org
Wed May 22 02:49:34 CDT 2019
On Wed, 22 May 2019 00:14:57 -0400
Ed Trager <ed.trager at gmail.com> wrote:
> I'm hoping one or both of you can provide me some guidance on this,
> thank you! Unfortunately, my OpenType skills are not at the "ninja"
> level required to get around all of the limitations in USE ...
If blind copying of Lamphun or Da Lekh, which I allow and encourage in
this respect, is not possible, then one can reduce the skill level in
one ways. One is to indiscriminately eliminate dotted circles that
follow marks; that would simplify the conditions in those fonts. (I
know that eliminating dotted circles present in the original string is
wrong - it's collateral damage in opposing oppression.)
Unfortunately, it's not as simple as that. If the USE is still
misclassifying the InSC medial consonants as USE-medial consonants,
then they can still leave one with the need to do Indic reordering in
the font, e.g. with the reflexes of <consonant>/ria/, to be encoded
<consonant, MEDIAL RA, SAKOT, LOW YA, SIGN E>, as the dotted circles
prevent SIGN E reordering to the start of the cluster.
The second way is to attack individual cases. For example, one
probably get away with a special substitutions to repair the HarfBuzz
and Windows corruptions of ᨯᩪᩕᩣ. I don't know if CoreText has yet
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