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

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: hongyi.zhao <at> gmail.com
To: emacs-pretest-bug <at> gnu.org
Subject: The Emacs 23 cann't display the cjk extb characters again.
Date: Mon, 6 Oct 2008 10:25:47 +0800

[Message part 1 (text/plain, inline)]

Dear all,

Now, I updated the Emacs 23 to 23.0.60.1 (i386-mingw-nt5.1.2600) of 2008-10-03 on LENNART-69DE564, then I find that I cann't see the correct cjk extb characters displayed by this version.  For example, the Chinese character uni20021, a character of cjk extb, which can be displayed correctly by using the previous versions by LENNART, cann't be displayed correctly now.  In addition, I can display that character on my box with emeditor, denoting that I've the corresponding fonts installed correctly.  Finally, I've use the following settings in my _emacas file which is suggested by Kenichi Handa:

--------------
(if (display-graphic-p)
(set-fontset-font
 (frame-parameter nil 'font)
 '(#x20000 . #x2fa1d)
 '("*-Sun-ExtB" . "unicode-sip")))
--------------

Please find the snapshot of this issue in the attachments. 

Regards,
-- 
Hongyi Zhao <hongyi.zhao <at> gmail.com> 
Xinjiang Technical Institute of Physics and Chemistry
Chinese Academy of Sciences 
GnuPG DSA: 0xD108493
2008-10-5

[uni20021.txt (text/plain, attachment)]

[display_by_emeditor.png (image/png, attachment)]

[display_by_emacs.png (image/png, attachment)]

Message #10 received at 1096 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Kenichi Handa  <handa <at> m17n.org>
Cc: 1096 <at> debbugs.gnu.org
Subject: Re: The Emacs 23 cann't display the cjk extb characters again.
Date: Tue, 09 Dec 2008 19:12:43 -0500

Hi Handa-san,

Could you take a look at this bug report?  Thanks.

hongyi.zhao <at> gmail.com wrote:

> I cnn't see the correct cjk extb characters displayed by this version.
> For example, the Chinese character uni20021, a character of cjk extb,
> which can be displayed correctly by using the previous versions,
> cann't be displayed correctly now.  In addition, I can display that
> character on my box with emeditor, denoting that I've the
> corresponding fonts installed correctly.  Finally, I've use the
> following settings in my _emacas file which is suggested by Kenichi
> Handa:
>
> (if (display-graphic-p)
> (set-fontset-font
>  (frame-parameter nil 'font)
>  '(#x20000 . #x2fa1d)
>  '("*-Sun-ExtB" . "unicode-sip")))

Message #15 received at 1096 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Kenichi Handa <handa <at> m17n.org>
To: Chong Yidong <cyd <at> stupidchicken.com>
Cc: 1096 <at> debbugs.gnu.org, hongyi.zhao <at> gmail.com
Subject: Re: The Emacs 23 cann't display the cjk extb characters again.
Date: Wed, 10 Dec 2008 15:11:09 +0900

In article <87abb428hw.fsf <at> cyd.mit.edu>, Chong Yidong <cyd <at> stupidchicken.com> writes:

> Hi Handa-san,
> Could you take a look at this bug report?  Thanks.

> hongyi.zhao <at> gmail.com wrote:

> > I cnn't see the correct cjk extb characters displayed by this version.
> > For example, the Chinese character uni20021, a character of cjk extb,
> > which can be displayed correctly by using the previous versions,
> > cann't be displayed correctly now.  In addition, I can display that
> > character on my box with emeditor, denoting that I've the
> > corresponding fonts installed correctly.  Finally, I've use the
> > following settings in my _emacas file which is suggested by Kenichi
> > Handa:
> >
> > (if (display-graphic-p)
> > (set-fontset-font
> >  (frame-parameter nil 'font)
> >  '(#x20000 . #x2fa1d)
> >  '("*-Sun-ExtB" . "unicode-sip")))

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.

---
Kenichi Handa
handa <at> m17n.org

Message #20 received at 1096 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: jasonr <at> f2s.com
To: Kenichi Handa <handa <at> m17n.org>, 1096 <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: Wed, 10 Dec 2008 06:43:32 +0000

Quoting Kenichi Handa <handa <at> m17n.org>:

> > hongyi.zhao <at> gmail.com wrote:

> > > (if (display-graphic-p)
> > > (set-fontset-font
> > >  (frame-parameter nil 'font)
> > >  '(#x20000 . #x2fa1d)
> > >  '("*-Sun-ExtB" . "unicode-sip")))
>
> 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.

At least part of the problem here is that the font name contains a -, which is
not compatible with the use of xlfd as the internal representation of fonts.

Message #25 received at 1096 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Kenichi Handa <handa <at> m17n.org>
To: jasonr <at> f2s.com
Cc: 1096 <at> debbugs.gnu.org, 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: Wed, 10 Dec 2008 16:44:28 +0900

In article <1228891412.493f651496a3e <at> webmail.freedom2surf.net>, jasonr <at> f2s.com writes:

> Quoting Kenichi Handa <handa <at> m17n.org>:
> > > hongyi.zhao <at> gmail.com wrote:

> > > > (if (display-graphic-p)
> > > > (set-fontset-font
> > > >  (frame-parameter nil 'font)
> > > >  '(#x20000 . #x2fa1d)
> > > >  '("*-Sun-ExtB" . "unicode-sip")))
> >
> > 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.

> At least part of the problem here is that the font name contains a -, which is
> not compatible with the use of xlfd as the internal representation of fonts.

That is why I suggested as above; i.e. prepend "*-" to the
family name so that the parser knows that foundry is nil and
the remaining part is a family name.

By the way, the above notation is kept for backward
compatibility (and also for handy way).   The cleaner code
is:

(set-fontset-font
 (frame-parameter nil 'font)
 '(#x20000 . #x2fa1d)
 (font-spec :family "*-Sun-ExtB" :registry "unicode-sip"))

because we are now using font-{spec|entity|object} as the
internal representation of fonts.

---
Kenichi Handa
handa <at> m17n.org

Message #30 received at 1096-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Kenichi Handa <handa <at> m17n.org>
Cc: 1096-done <at> debbugs.gnu.org, hongyi.zhao <at> gmail.com
Subject: Re: The Emacs 23 cann't display the cjk extb characters again.
Date: Wed, 10 Dec 2008 08:59:03 -0500

Kenichi Handa <handa <at> m17n.org> writes:

> 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.

Thank you.

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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