lisp/gnus/compface.el

   1 ;;; compface.el --- functions for converting X-Face headers
   2
   3 ;; Copyright (C) 2002-2015 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Keywords: news
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 ;;;###
  28 (defun uncompface (face)
  29   "Convert FACE to pbm.
  30 Requires the external programs `uncompface', and `icontopbm'.  On a
  31 GNU/Linux system these might be in packages with names like `compface'
  32 or `faces-xface' and `netpbm' or `libgr-progs', for instance."
  33   (with-temp-buffer
  34     (unless (featurep 'xemacs) (set-buffer-multibyte nil))
  35     (insert face)
  36     (let ((coding-system-for-read 'raw-text)
  37           ;; At least "icontopbm" doesn't work with Windows because
  38           ;; the line-break code is converted into CRLF by default.
  39           (coding-system-for-write 'binary))
  40       (and (eq 0 (apply 'call-process-region (point-min) (point-max)
  41                         "uncompface"
  42                         'delete '(t nil) nil))
  43            (progn
  44              (goto-char (point-min))
  45              (insert "/* Format_version=1, Width=48, Height=48, Depth=1,\
  46  Valid_bits_per_item=16 */\n")
  47              ;; I just can't get "icontopbm" to work correctly on its
  48              ;; own in XEmacs.  And Emacs doesn't understand un-raw pbm
  49              ;; files.
  50              (if (not (featurep 'xemacs))
  51                  (eq 0 (call-process-region (point-min) (point-max)
  52                                             "icontopbm"
  53                                             'delete '(t nil)))
  54                (shell-command-on-region (point-min) (point-max)
  55                                         "icontopbm | pnmnoraw"
  56                                         (current-buffer) t)
  57                t))
  58            (buffer-string)))))
  59
  60 (provide 'compface)
  61
  62 ;;; compface.el ends here