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;;; compface.el --- functions for converting X-Face headers
;; Copyright (C) 2002-2017 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
;; GNU Emacs 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 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs 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 Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
;;;###
(defun uncompface (face)
"Convert FACE to pbm.
Requires the external programs `uncompface', and `icontopbm'. On a
GNU/Linux system these might be in packages with names like `compface'
or `faces-xface' and `netpbm' or `libgr-progs', for instance."
(with-temp-buffer
(set-buffer-multibyte nil)
(insert face)
(let ((coding-system-for-read 'raw-text)
;; At least "icontopbm" doesn't work with Windows because
;; the line-break code is converted into CRLF by default.
(coding-system-for-write 'binary))
(and (eq 0 (apply 'call-process-region (point-min) (point-max)
"uncompface"
'delete '(t nil) nil))
(progn
(goto-char (point-min))
(insert "/* Format_version=1, Width=48, Height=48, Depth=1,\
Valid_bits_per_item=16 */\n")
;; Emacs doesn't understand un-raw pbm files.
(eq 0 (call-process-region (point-min) (point-max)
"icontopbm"
'delete '(t nil))))
(buffer-string)))))
(provide 'compface)
;;; compface.el ends here
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