--- /dev/null
+;;; mime-image.el --- mime-view filter to display images
+
+;; Copyright (C) 1995,1996,1997 MORIOKA Tomohiko
+;; Copyright (C) 1996 Dan Rich
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Dan Rich <drich@morpheus.corp.sgi.com>
+;; Maintainer: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Created: 1995/12/15
+;; Renamed: 1997/2/21 from tm-image.el
+;; Version: $Id: mime-image.el,v 0.1 1997-02-21 06:43:51 tmorioka Exp $
+
+;; Keywords: image, picture, X-Face, MIME, multimedia, mail, news
+
+;; This file is part of XEmacs.
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 2, or (at
+;; your option) any later version.
+
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU XEmacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+;; If you use this program with MULE, please install
+;; etl8x16-bitmap.bdf font included in tl package.
+
+;;; Code:
+
+(require 'mime-view)
+
+(cond (running-xemacs
+ (require 'images)
+
+ (defun-maybe image-inline-p (format)
+ (or (memq format image-native-formats)
+ (find-if (function
+ (lambda (native)
+ (image-converter-chain format native)
+ ))
+ image-native-formats)
+ ))
+
+ (image-register-netpbm-utilities)
+ (image-register-converter 'pic 'ppm "pictoppm")
+ (image-register-converter 'mag 'ppm "magtoppm")
+
+ (defun bitmap-insert-xbm-file (file)
+ (let ((gl (make-glyph (list (cons 'x file))))
+ (e (make-extent (point) (point)))
+ )
+ (set-extent-end-glyph e gl)
+ ))
+
+ ;;
+ ;; X-Face
+ ;;
+ (autoload 'highlight-headers "highlight-headers")
+
+ (defun mime-preview/x-face-function-use-highlight-headers ()
+ (highlight-headers (point-min) (re-search-forward "^$" nil t) t)
+ )
+
+ (add-hook 'mime-view-content-header-filter-hook
+ 'mime-preview/x-face-function-use-highlight-headers)
+
+ )
+ ((featurep 'mule)
+ ;; for MULE 2.* or mule merged EMACS
+ (require 'x-face-mule)
+
+ (defvar image-native-formats '(xbm))
+
+ (defun-maybe image-inline-p (format)
+ (memq format image-native-formats)
+ )
+
+ (defun-maybe image-normalize (format data)
+ (and (eq format 'xbm)
+ (vector 'xbm ':data data)
+ ))
+
+ ;;
+ ;; X-Face
+ ;;
+ (if (file-installed-p uncompface-program exec-path)
+ (add-hook 'mime-view-content-header-filter-hook
+ 'x-face-decode-message-header)
+ )
+ ))
+
+(or (fboundp 'image-invalid-glyph-p)
+ (defsubst image-invalid-glyph-p (glyph)
+ (or (null (aref glyph 0))
+ (null (aref glyph 2))
+ (equal (aref glyph 2) "")
+ ))
+ )
+
+(defvar mime-view-image-converter-alist nil)
+
+(mapcar (function
+ (lambda (rule)
+ (let ((ctype (car rule))
+ (format (cdr rule))
+ )
+ (if (image-inline-p format)
+ (progn
+ (set-alist 'mime-view-content-filter-alist
+ ctype
+ (function mime-preview/filter-for-image))
+ (set-alist 'mime-view-image-converter-alist
+ ctype format)
+ (add-to-list
+ 'mime-view-default-showing-Content-Type-list
+ ctype)
+ )
+ ))))
+ '(("image/jpeg" . jpeg)
+ ("image/gif" . gif)
+ ("image/tiff" . tiff)
+ ("image/x-tiff" . tiff)
+ ("image/xbm" . xbm)
+ ("image/x-xbm" . xbm)
+ ("image/x-xpixmap" . xpm)
+ ("image/x-pic" . pic)
+ ("image/x-mag" . mag)
+ ))
+
+(defvar mime-view-ps-to-gif-command "pstogif")
+
+
+;;; @ content filter for images
+;;;
+;; (for XEmacs 19.12 or later)
+
+(defun mime-preview/filter-for-image (ctype params encoding)
+ (let* ((mode mime::preview/original-major-mode)
+ (m (assq mode mime-view-code-converter-alist))
+ (charset (assoc "charset" params))
+ (beg (point-min)) (end (point-max))
+ )
+ (remove-text-properties beg end '(face nil))
+ (message "Decoding image...")
+ (mime-decode-region beg end encoding)
+ (let* ((minor (assoc-value ctype mime-view-image-converter-alist))
+ (gl (image-normalize minor (buffer-string)))
+ e)
+ (delete-region (point-min)(point-max))
+ (cond ((image-invalid-glyph-p gl)
+ (setq gl nil)
+ (message "Invalid glyph!")
+ )
+ ((eq (aref gl 0) 'xbm)
+ (let ((xbm-file
+ (make-temp-name (expand-file-name "tm" mime/tmp-dir))))
+ (insert (aref gl 2))
+ (write-region (point-min)(point-max) xbm-file)
+ (message "Decoding image...")
+ (delete-region (point-min)(point-max))
+ (bitmap-insert-xbm-file xbm-file)
+ (delete-file xbm-file)
+ )
+ (message "Decoding image... done")
+ )
+ (t
+ (setq gl (make-glyph gl))
+ (setq e (make-extent (point) (point)))
+ (set-extent-end-glyph e gl)
+ (message "Decoding image... done")
+ ))
+ )
+ (insert "\n")
+ ))
+
+
+;;; @ content filter for Postscript
+;;;
+;; (for XEmacs 19.14 or later)
+
+(defun mime-preview/filter-for-application/postscript (ctype params encoding)
+ (let* ((mode mime::preview/original-major-mode)
+ (m (assq mode mime-view-code-converter-alist))
+ (beg (point-min)) (end (point-max))
+ (file-base (make-temp-name (expand-file-name "tm" mime/tmp-dir)))
+ (ps-file (concat file-base ".ps"))
+ (gif-file (concat file-base ".gif"))
+ )
+ (remove-text-properties beg end '(face nil))
+ (message "Decoding Postscript...")
+ (mime-decode-region beg end encoding)
+ (write-region (point-min)(point-max) ps-file)
+ (message "Decoding Postscript...")
+ (delete-region (point-min)(point-max))
+ (call-process mime-view-ps-to-gif-command nil nil nil ps-file)
+ (set-extent-end-glyph (make-extent (point) (point))
+ (make-glyph (vector 'gif :file gif-file)))
+ (message "Decoding Postscript... done")
+ (delete-file ps-file)
+ (delete-file gif-file)
+ ))
+
+(set-alist 'mime-view-content-filter-alist
+ "application/postscript"
+ (function mime-preview/filter-for-application/postscript))
+
+(if (featurep 'gif)
+ (add-to-list 'mime-view-default-showing-Content-Type-list
+ "application/postscript")
+ )
+
+
+;;; @ end
+;;;
+
+(provide 'mime-image)
+
+;;; mime-image.el ends here
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