bug#613: 23.0.60; Unicode display problems

[Kenichi Handa <handa@m17n.org>]

In article <87myjv2tc8.fsf@stupidchicken.com>, Chong Yidong <cyd@stupidchicken.com> writes:

> Hi Handa,
> Do you have any ideas about this?  Could it be related to the fixes you
> introduced on 2008-07-09?

Perhaps.

> > The screen representations of unicode codepoints for left/right double quotes
> > (x201c, x201d), square root (x221a) and probably many other are too wide and
> > not anti-aliased like the rest of my glyphs.  According to display-char, they
> > are taken from
> >
> > xft:-unknown-Kochi Gothic-normal-normal-normal-*-17-*-*-*-*-0-iso10646-1
> >
> > In contrast to this, alpha, beta, gamma etc are taken from my main screen font
> > called
> >
> > xft:-unknown-DejaVu Sans Mono-normal-normal-normal-*-17-*-*-*-m-0-iso10646-1
> >
> > Additionally, the ellipsis (x2026) consists of three dots in x-height (instead
> > of dots on the baseline).

Emacs defines those characters (U+201C, U+201D, U+221A) as
`symbol' script and the default fontset defines this font
for `symbol':
  (font-spec :registry "iso10646-1" :script 'symbol)

So, somehow, "Kochi Gothic" font is scored higher than
"Dejavu Sans Mono".  Please try this:

(1) Start Emacs as "% emacs -Q".
(2) ESC : (setq font-log nil)
(3) ESC : (insert #x201c)
(4) M-x font-show-log RET

and show me the result.

---
Kenichi Handa
handa@ni.aist.go.jp