Re: artifacts in GNU CVS branch emacs-unicode-2

[Katsumi Yamaoka <yamaoka@xxxxxxx>]

>>>>> In [emacs-w3m : No.09139] Trent Buck wrote:
> On Mon, Jan 29, 2007 at 06:04:24AM +1100, trentbuck@xxxxxxxxx wrote:
>> I start Emacs with a proportional font:
>>
>>     emacs --enable-font-backend --font 'DejaVu Sans-8' --eval '(w3m-browse-url "http://en.wikipedia.org/")'
>>
>> I scroll up and down (C-v, M-v). I see 2 pixel underline to the right
>> of some lines.  The underlines should not be there; they are rendering
>> artifacts.

> Screenshot attached.

I guess the cause of this is that Emacs doesn't support the
Telugu language or the Telugu font is missing.  I got a similar
result[ScreenShot1] in the Fedora Core 6 system by running the
most recent Emacs 23 and setting the language environment to
English.  When I set the language environment to Japanese, those
garbage lines don't appear but an improper font is chosen for
the Telugu text[ScreenShot2].  Even if you don't have emacs-w3m
installed, you will see it by:

1. Start Emacs 23 using the options:
	-Q --enable-font-backend --font 'DejaVu Sans-8'
2. Set the language environment to English.
3. Eval the following form:

--8<---------------cut here---------------start------------->8---
(let* ((default-enable-multibyte-characters t)
       (buffer (get-buffer-create "*Telugu*"))
       (text (decode-coding-string "\
Suomi\302\267\340\260\244\340\261\206\340\260\262\340\261\201\
\340\260\227\340\261\201\302\267T\303\274rk\303\247e\302\267\
\320\243\320\272\321\200\320\260\321\227\320\275\321\201\321\
\214\320\272\320\260\n" 'utf-8)))
  (switch-to-buffer buffer)
  (erase-buffer)
  (dotimes (i (* 3 (window-height)))
    (insert text))
  (goto-char (point-min)))
--8<---------------cut here---------------end--------------->8---

Regards,