GNU bug report logs - #1096
The Emacs 23 cann't display the cjk extb characters again.

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Message #39 received at 1096-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Jason Rumney <jasonr <at> f2s.com>
To: Kenichi Handa <handa <at> m17n.org>, 1096-done <at> debbugs.gnu.org
Cc: Chong Yidong <cyd <at> stupidchicken.com>, hongyi.zhao <at> gmail.com
Subject: Re: bug#1096: The Emacs 23 cann't display the cjk extb characters
 again.
Date: Thu, 11 Dec 2008 21:14:00 +0800

Kenichi Handa wrote:
> I've just installed a fix.  At least with Xft font backend,
> Emacs should be able to find a proper font for the Unicode
> SIP area (#x20000..#x2FFFF) now.
>   

In addition to that change, which should help with displaying those 
characters by default, it turns out there is a bug in the Windows 
function that we use to encode characters into glyph points when passed 
a surrogate pair. I've worked around it by using an oversized glyph buffer.

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