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cannot create image from jpeg file without specify type


From: ARISAWA Akihiro
Subject: cannot create image from jpeg file without specify type
Date: Thu, 07 Mar 2002 00:40:03 +0900
User-agent: Wanderlust/2.9.7 (Unchained Melody) SEMI/1.14.3 (Ushinoya) FLIM/1.14.3 (Unebigoryƍmae) APEL/10.3 Emacs/21.1 (i686-pc-linux-gnu) MULE/5.0 (SAKAKI)

This bug report will be sent to the Free Software Foundation,
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Please write in English, because the Emacs maintainers do not have
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Your bug report will be posted to the address@hidden mailing list,
and to the gnu.emacs.bug news group.

In GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2001-10-24 on puyo.nijino.com
configured using `configure  --with-xpm --with-jpeg --with-tiff --with-gif 
--with-png --without-xim'
Important settings:
  value of $LC_ALL: ja_JP.eucJP
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ja_JP.eucJP
  locale-coding-system: japanese-iso-8bit
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

When `create-image' is called with jpeg file without specify type,
it returns nil. Because `image-type-from-file-header' returns nil.

The following patch fixes this problem.

2002-03-06  ARISAWA Akihiro  <address@hidden>

        * image.el (image-type-from-file-header): Make temporary buffer
        unibyte.

--- lisp/image.el.orig  Tue Aug 21 17:11:52 2001
+++ lisp/image.el       Thu Mar  7 00:36:32 2002
@@ -97,6 +97,7 @@ (defun image-type-from-file-header (file
     (setq file (expand-file-name file data-directory)))
   (setq file (expand-file-name file))
   (let ((header (with-temp-buffer
+                 (set-buffer-multibyte nil)
                  (insert-file-contents-literally file nil 0 256)
                  (buffer-string))))
     (image-type-from-data header)))
Recent input:
<help-echo> <down-mouse-2> <mouse-2> C-j <escape> x 
r e p o r t - <tab> <return>

Recent messages:
Loading /usr/local/libexec/emacs/21.1/i686-pc-linux-gnu/fns-21.1.1.el 
(source)...done
(emacs -q)
Loading disp-table...done
Loading tool-bar...done
Loading image...done
Loading tooltip...done
Loading advice...done
For information about the GNU Project and its goals, type C-h C-p.
Mark set
Loading emacsbug...done

-- 
ARISAWA Akihiro

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