Hi, Ed, Behdad, On Sun, May 20, 2012 at 3:45 AM, Ed Trager <[email protected]> wrote: > On Fri, May 18, 2012 at 5:48 PM, Behdad Esfahbod <[email protected]> wrote: >> On 05/18/2012 04:02 PM, Ed Trager wrote: >>> >>> In Tai Tham, U+1A6E VOWEL SIGN E needs to be shifted all the way to >>> the left so that the final visual appearance would be: >> >> Are you sure? Without U+1A60 TAI THAM SIGN SAKOT before the subjoined >> consonant? Reading Unicode suggests that you need that sign betwee PA and >> LA. > > For most subjoined consonants, yes, that's true. But note in > particular that U+1A56 MEDIAL LA and U+1A57 MEDIAL LA TANG LAI were > encoded separately. In the case of these two "LA" signs, I believe > there are two reasons justifying the separate encoding: > > (1) These are variant forms of the same subjoined letter LA: > apparently, there is no other good way to do it other than encoding > both. > > (2) Both of these LA signs can be part of triple consonant clusters, > i.e. "KLW" appears in the common word Thai / Tai word for banana, > กล้วย, "klwy" . In Tai Tham, both the L and the W appear as > below-base stacked forms (and actually the "y" is also a subjoined > form, but it's kind of hanging off the right side of the whole stack). > > There are some other separately-encoded subjoining consonant signs: > U+1A5B, U+1A5C, U+1A5D, U+1A5E.
Please also count U+1A55 (MEDIAL RA) in the rule, although it's not a subjoined form. Regards, -Thep. -- Theppitak Karoonboonyanan http://linux.thai.net/~thep/ _______________________________________________ HarfBuzz mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/harfbuzz
