> From: Kenichi Handa <ha...@m17n.org>
> Cc: jas...@gnu.org, emacs-bidi@gnu.org, emacs-de...@gnu.org
> Date: Wed, 01 Sep 2010 11:17:03 +0900
>
> I read the function uniscribe_shape roughly. It has this
> code:
>
> for (i = 0; i < nitems; i++)
> {
> int nglyphs, nchars_in_run, rtl = items[i].a.fRTL ? -1 : 1;
> [...]
> if (SUCCEEDED (result))
> {
> int j, nclusters, from, to;
>
> from = rtl > 0 ? 0 : nchars_in_run - 1;
>
> Doesn't it mean uniscribe_shape reorders glyphs?
This reorders a single LGSTRING, according to my reading. Isn't an
LGSTRING a single grapheme cluster, rather than several distinct
characters?
Btw, where's the documentation of LGSTRING? The commentary to
uniscribe_shape says to look in font-make-gstring, but I cannot find
that, neither as function nor as variable. In general, everything
about compositions and lgstrings needs a lot more of documentation.
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