1 ;;; tm-image.el --- tm-view filter to display images in XEmacs or MULE buffers
3 ;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko
4 ;; Copyright (C) 1996 Dan Rich
6 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
7 ;; Dan Rich <drich@morpheus.corp.sgi.com>
8 ;; Maintainer: MORIOKA Tomohiko <morioka@jaist.ac.jp>
10 ;; Version: $Id: tm-image.el,v 7.29 1997/03/10 13:12:15 morioka Exp $
12 ;; Keywords: image, picture, X-Face, MIME, multimedia, mail, news
14 ;; This file is part of XEmacs.
16 ;; This program is free software; you can redistribute it and/or
17 ;; modify it under the terms of the GNU General Public License as
18 ;; published by the Free Software Foundation; either version 2, or (at
19 ;; your option) any later version.
21 ;; This program is distributed in the hope that it will be useful, but
22 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 ;; General Public License for more details.
26 ;; You should have received a copy of the GNU General Public License
27 ;; along with GNU XEmacs; see the file COPYING. If not, write to the
28 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
29 ;; Boston, MA 02111-1307, USA.
32 ;; If you use this program with MULE, please install
33 ;; etl8x16-bitmap.bdf font included in tl package.
42 (defun-maybe image-inline-p (format)
43 (or (memq format image-native-formats)
46 (image-converter-chain format native)
51 (image-register-netpbm-utilities)
52 (image-register-converter 'pic 'ppm "pictoppm")
53 (image-register-converter 'mag 'ppm "magtoppm")
55 (defun bitmap-insert-xbm-file (file)
56 (let ((gl (make-glyph (list (cons 'x file))))
57 (e (make-extent (point) (point)))
59 (set-extent-end-glyph e gl)
65 (autoload 'highlight-headers "highlight-headers")
67 (defun mime-preview/x-face-function-use-highlight-headers ()
68 (highlight-headers (point-min) (re-search-forward "^$" nil t) t)
71 (add-hook 'mime-viewer/content-header-filter-hook
72 'mime-preview/x-face-function-use-highlight-headers)
76 ;; for MULE 2.* or mule merged EMACS
77 (require 'x-face-mule)
79 (defvar image-native-formats '(xbm))
81 (defun-maybe image-inline-p (format)
82 (memq format image-native-formats)
85 (defun-maybe image-normalize (format data)
87 (vector 'xbm ':data data)
93 (if (exec-installed-p uncompface-program)
94 (add-hook 'mime-viewer/content-header-filter-hook
95 'x-face-decode-message-header)
99 (or (fboundp 'image-invalid-glyph-p)
100 (defsubst image-invalid-glyph-p (glyph)
101 (or (null (aref glyph 0))
102 (null (aref glyph 2))
103 (equal (aref glyph 2) "")
107 (defvar mime-viewer/image-converter-alist nil)
111 (let ((ctype (car rule))
114 (if (image-inline-p format)
116 (set-alist 'mime-viewer/content-filter-alist
118 (function mime-preview/filter-for-image))
119 (set-alist 'mime-viewer/image-converter-alist
122 'mime-viewer/default-showing-Content-Type-list
126 '(("image/jpeg" . jpeg)
128 ("image/tiff" . tiff)
129 ("image/x-tiff" . tiff)
131 ("image/x-xbm" . xbm)
132 ("image/x-xpixmap" . xpm)
133 ("image/x-pic" . pic)
134 ("image/x-mag" . mag)
137 (defvar mime-viewer/ps-to-gif-command "pstogif")
140 ;;; @ content filter for images
142 ;; (for XEmacs 19.12 or later)
144 (defun mime-preview/filter-for-image (ctype params encoding)
145 (let* ((mode mime::preview/original-major-mode)
146 (m (assq mode mime-viewer/code-converter-alist))
147 (charset (assoc "charset" params))
148 (beg (point-min)) (end (point-max))
150 (remove-text-properties beg end '(face nil))
151 (message "Decoding image...")
152 (mime-decode-region beg end encoding)
153 (let* ((minor (assoc-value ctype mime-viewer/image-converter-alist))
154 (gl (image-normalize minor (buffer-string)))
156 (delete-region (point-min)(point-max))
157 (cond ((image-invalid-glyph-p gl)
159 (message "Invalid glyph!")
161 ((eq (aref gl 0) 'xbm)
163 (make-temp-name (expand-file-name "tm" mime/tmp-dir))))
165 (write-region (point-min)(point-max) xbm-file)
166 (message "Decoding image...")
167 (delete-region (point-min)(point-max))
168 (bitmap-insert-xbm-file xbm-file)
169 (delete-file xbm-file)
171 (message "Decoding image... done")
174 (setq gl (make-glyph gl))
175 (setq e (make-extent (point) (point)))
176 (set-extent-end-glyph e gl)
177 (message "Decoding image... done")
184 ;;; @ content filter for Postscript
186 ;; (for XEmacs 19.14 or later)
188 (defun mime-preview/filter-for-application/postscript (ctype params encoding)
189 (let* ((mode mime::preview/original-major-mode)
190 (m (assq mode mime-viewer/code-converter-alist))
191 (beg (point-min)) (end (point-max))
192 (file-base (make-temp-name (expand-file-name "tm" mime/tmp-dir)))
193 (ps-file (concat file-base ".ps"))
194 (gif-file (concat file-base ".gif"))
196 (remove-text-properties beg end '(face nil))
197 (message "Decoding Postscript...")
198 (mime-decode-region beg end encoding)
199 (write-region (point-min)(point-max) ps-file)
200 (message "Decoding Postscript...")
201 (delete-region (point-min)(point-max))
202 (call-process mime-viewer/ps-to-gif-command nil nil nil ps-file)
203 (set-extent-end-glyph (make-extent (point) (point))
204 (make-glyph (vector 'gif :file gif-file)))
205 (message "Decoding Postscript... done")
206 (delete-file ps-file)
207 (delete-file gif-file)
210 (set-alist 'mime-viewer/content-filter-alist
211 "application/postscript"
212 (function mime-preview/filter-for-application/postscript))
215 (add-to-list 'mime-viewer/default-showing-Content-Type-list
216 "application/postscript")
225 ;;; tm-image.el ends here