contrib/compface.el

   1 ;;; compface.el --- functions for converting X-Face headers
   2 ;; Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   5 ;;      TAKAI Kousuke <tak@kmc.gr.jp>
   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, or (at your option)
  13 ;; 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 (defgroup compface nil
  28   "X-Face image conversion."
  29   :group 'extensions)
  30
  31 (defcustom uncompface-use-external (and (not noninteractive)
  32                                         (executable-find "uncompface")
  33                                         (executable-find "icontopbm")
  34                                         'undecided)
  35   "*Specify which of the internal or the external decoder should be used.
  36 nil means to use the internal ELisp-based uncompface program.  t means
  37 to use the external decoder.  In the later case, you need to have the
  38 external `uncompface' and `icontopbm' programs installed.  The default
  39 value is nil if those external programs aren't available, otherwise
  40 `undecided' which means to determine it by checking whether the host
  41 machine is slow.  See also `uncompface-use-external-threshold'.  You
  42 can skip that check by setting this value as nil or t explicitly."
  43   :type '(choice (const :tag "Use the internal decoder" nil)
  44                  (const :tag "Use the external decoder" t)
  45                  (const :tag "Autodetection" undecided))
  46   :group 'compface)
  47
  48 (defcustom uncompface-use-external-threshold 0.1
  49   "*Number of seconds to check whether the host machine is slow.
  50 If the host takes time larger than this value for decoding an X-Face
  51 using the internal ELisp-based uncompface program, it will be changed
  52 to using the external `uncompface' and `icontopbm' programs if they
  53 are available.  Note that the measurement may never be exact."
  54   :type 'number
  55   :group 'compface)
  56
  57 (eval-when-compile
  58   (defmacro uncompface-float-time (&optional specified-time)
  59     (if (fboundp 'float-time)
  60         `(float-time ,specified-time)
  61       `(let ((time (or ,specified-time (current-time))))
  62          (+ (* (car time) 65536.0)
  63             (cadr time)
  64             (cond ((consp (setq time (cddr time)))
  65                    (/ (car time) 1000000.0))
  66                   (time
  67                    (/ time 1000000.0))
  68                   (t
  69                    0)))))))
  70
  71 (defun uncompface (face)
  72   "Convert FACE to pbm.
  73 If `uncompface-use-external' is t, it requires the external programs
  74 `uncompface', and `icontopbm'.  On a GNU/Linux system these might be
  75 in packages with names like `compface' or `faces-xface' and `netpbm'
  76 or `libgr-progs', for instance."
  77   (cond ((eq uncompface-use-external nil)
  78          (uncompface-internal face))
  79         ((eq uncompface-use-external t)
  80          (with-temp-buffer
  81            (unless (featurep 'xemacs) (set-buffer-multibyte nil))
  82            (insert face)
  83            (let ((coding-system-for-read 'raw-text)
  84                  ;; At least "icontopbm" doesn't work with Windows because
  85                  ;; the line-break code is converted into CRLF by default.
  86                  (coding-system-for-write 'binary))
  87              (and (eq 0 (apply 'call-process-region (point-min) (point-max)
  88                                "uncompface"
  89                                'delete '(t nil) nil))
  90                   (progn
  91                     (goto-char (point-min))
  92                     (insert "/* Format_version=1, Width=48, Height=48,\
  93  Depth=1, Valid_bits_per_item=16 */\n")
  94                     ;; I just can't get "icontopbm" to work correctly on its
  95                     ;; own in XEmacs.  And Emacs doesn't understand un-raw pbm
  96                     ;; files.
  97                     (if (not (featurep 'xemacs))
  98                         (eq 0 (call-process-region (point-min) (point-max)
  99                                                    "icontopbm"
 100                                                    'delete '(t nil)))
 101                       (shell-command-on-region (point-min) (point-max)
 102                                                "icontopbm | pnmnoraw"
 103                                                (current-buffer) t)
 104                       t))
 105                   (buffer-string)))))
 106         (t
 107          (let* ((gc-cons-threshold (eval '(lsh -1 -1)))
 108                 (start (current-time)))
 109            (prog1
 110                (uncompface-internal face)
 111              (setq uncompface-use-external
 112                    (and (> (- (uncompface-float-time (current-time))
 113                               (uncompface-float-time start))
 114                            uncompface-use-external-threshold)
 115                         (executable-find "uncompface")
 116                         (executable-find "icontopbm")
 117                         t))
 118              (message "Setting `uncompface-use-external' to `%s'"
 119                       uncompface-use-external))))))
 120
 121 ;; The following section is a bug-for-bug compatible version of
 122 ;; `uncompface' program entirely implemented in Emacs-Lisp.
 123
 124 (eval-when-compile
 125   ;; The size of 48x48 is actually hard-coded into the code itself,
 126   ;; so you cannot simply change those values.  So we hard-code
 127   ;; them into the compiled code.
 128   (defconst uncompface-width 48
 129     "Width of X-Face bitmap image.")
 130   (defconst uncompface-height 48
 131     "Height of X-Face bitmap image.")
 132
 133   ;; Again, this is also hard-coded into the compiled code.
 134   (defconst uncompface-guesses
 135     (mapcar (lambda (x)
 136               (mapcar (lambda (x)
 137                         (let ((vector (make-vector (length x) nil))
 138                               (i 0))
 139                           (while x
 140                             (or (zerop (car x))
 141                                 (aset vector i t))
 142                             (setq x (cdr x)
 143                                   i (1+ i)))
 144                           vector))
 145                       x))
 146             '((;; g_00
 147                (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 148                 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
 149                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 150                 1 1 1 0 0 0 1 1 1 1 0 1 1 1 1 1
 151                 0 0 0 0 0 1 0 1 0 0 0 1 0 1 1 1
 152                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 153                 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1
 154                 0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 1
 155                 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
 156                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 157                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 158                 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 1
 159                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 160                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 161                 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1
 162                 0 1 0 0 0 1 0 1 0 0 1 0 1 1 1 1
 163                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 164                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1
 165                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
 166                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 167                 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
 168                 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
 169                 0 0 0 0 0 0 0 1 0 0 1 1 1 1 1 1
 170                 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 171                 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1
 172                 1 0 0 0 0 0 0 0 1 1 0 0 1 0 0 1
 173                 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
 174                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 175                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 176                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 177                 0 0 0 1 1 0 1 1 0 0 0 1 1 1 1 1
 178                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 179                 0 1 0 0 1 1 1 1 0 1 0 1 0 1 0 0
 180                 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 1
 181                 0 1 0 1 0 1 1 1 0 1 0 0 0 1 1 1
 182                 1 1 0 1 0 1 1 1 0 0 1 1 1 1 0 1
 183                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 184                 0 1 0 1 1 1 1 1 0 0 0 1 1 1 1 1
 185                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 186                 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
 187                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 188                 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1
 189                 0 0 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 190                 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1
 191                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 192                 0 1 0 1 1 1 1 1 0 0 0 1 1 1 0 1
 193                 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 194                 0 0 0 0 1 1 1 1 0 0 0 1 1 1 1 1
 195                 0 0 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 196                 0 0 0 0 0 0 1 1 0 0 0 1 1 1 1 1
 197                 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 198                 1 1 1 1 0 1 1 1 0 1 1 1 1 1 1 1
 199                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 200                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 201                 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
 202                 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1
 203                 0 0 0 0 1 1 1 1 0 1 0 0 1 1 1 1
 204                 1 1 0 1 0 1 1 1 0 0 1 1 1 1 1 1
 205                 0 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 206                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 207                 0 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1
 208                 0 1 0 1 0 1 1 0 0 0 1 0 0 1 0 1
 209                 0 0 0 1 1 1 1 1 0 1 1 1 1 1 1 1
 210                 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 211                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 212                 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
 213                 0 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1
 214                 0 0 0 0 0 0 0 1 1 1 0 1 1 1 1 1
 215                 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0
 216                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 217                 0 0 0 0 0 1 1 1 1 0 1 0 0 0 1 0
 218                 0 0 0 0 1 0 0 1 0 0 0 0 1 1 1 1
 219                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 220                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 221                 0 0 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 222                 0 0 0 1 1 0 0 0 1 1 0 1 0 1 1 1
 223                 1 0 0 1 0 1 0 0 0 1 1 1 0 0 0 1
 224                 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
 225                 0 0 0 1 1 1 1 1 1 0 1 1 0 1 1 1
 226                 0 0 0 0 1 1 0 0 0 0 0 0 0 1 1 1
 227                 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
 228                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 229                 0 0 0 0 1 1 1 1 0 0 0 1 1 1 1 1
 230                 1 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1
 231                 0 0 0 0 0 1 0 1 0 0 0 1 0 1 0 1
 232                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 233                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 234                 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1
 235                 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1
 236                 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
 237                 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
 238                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
 239                 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0
 240                 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1
 241                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 242                 1 0 0 1 1 1 1 1 1 0 0 0 1 1 1 1
 243                 0 1 0 0 1 0 1 0 0 1 0 0 0 0 0 0
 244                 0 1 0 1 1 1 1 1 0 1 0 1 1 1 1 1
 245                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
 246                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 247                 0 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1
 248                 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
 249                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 250                 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
 251                 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 1
 252                 1 1 0 1 0 1 1 1 0 1 0 1 1 1 1 1
 253                 0 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 254                 0 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
 255                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 256                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 257                 1 1 1 1 1 1 1 1 0 1 1 1 0 1 1 1
 258                 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1
 259                 0 1 0 0 1 1 1 1 1 1 1 0 1 1 1 1
 260                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 261                 0 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1
 262                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 263                 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1
 264                 0 0 0 0 1 1 1 1 0 1 0 0 1 1 1 1
 265                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 266                 1 0 0 1 1 1 0 1 1 1 1 1 1 1 1 1
 267                 0 0 0 0 1 1 1 1 1 1 1 0 1 1 1 1
 268                 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
 269                 0 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1
 270                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 271                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 272                 1 1 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 273                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 274                 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
 275                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 276                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1
 277                 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0
 278                 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1 1
 279                 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
 280                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0
 281                 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0
 282                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 283                 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1
 284                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 285                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 286                 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0
 287                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 288                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 289                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 290                 0 0 0 0 1 1 0 0 0 0 0 0 1 1 1 1
 291                 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
 292                 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 293                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 294                 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 295                 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0
 296                 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1
 297                 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 1
 298                 1 0 1 0 1 1 1 1 0 0 0 0 1 1 1 1
 299                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 300                 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
 301                 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
 302                 0 1 0 0 0 1 1 0 0 0 0 0 1 1 0 0
 303                 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
 304                 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
 305                 0 0 0 0 1 1 1 1 0 0 0 1 0 1 0 1
 306                 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
 307                 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
 308                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 309                 0 1 1 1 1 1 1 1 0 1 0 1 1 1 1 1
 310                 1 1 0 1 1 0 1 1 1 1 1 1 1 1 1 1
 311                 0 1 0 0 1 1 1 1 0 0 1 1 1 1 1 0
 312                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 313                 0 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1
 314                 1 0 0 1 0 1 0 1 0 1 0 0 1 1 1 1
 315                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 316                 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1
 317                 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 318                 1 0 0 1 1 1 1 1 1 1 0 1 1 1 1 1
 319                 0 0 1 0 0 1 0 1 0 0 0 0 1 1 1 0
 320                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 0 1
 321                 0 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 322                 1 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
 323                 0 0 0 0 1 1 1 1 1 1 1 1 1 0 1 0
 324                 0 0 0 0 0 1 0 0 0 1 0 0 1 1 1 1
 325                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 326                 1 1 1 1 0 1 1 1 0 1 1 1 0 1 1 1
 327                 0 1 0 0 0 1 1 1 1 1 1 0 1 1 0 1
 328                 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
 329                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 330                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 331                 0 1 0 0 1 1 1 1 0 1 1 0 1 1 1 1
 332                 1 1 0 1 1 0 0 0 0 1 0 1 1 1 1 1
 333                 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 334                 1 1 0 1 1 1 1 1 0 1 0 1 1 1 1 1
 335                 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1
 336                 1 0 0 1 0 1 0 0 0 0 0 0 1 1 0 1
 337                 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 338                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 339                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
 340                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
 341                 0 1 0 0 0 1 1 0 0 1 0 1 0 1 1 1
 342                 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 1
 343                 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0
 344                 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1
 345                 0 1 0 0 0 1 1 1 0 1 1 0 1 1 0 0
 346                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 347                 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
 348                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 349                 0 0 0 0 1 0 1 1 0 1 0 0 1 1 1 1
 350                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
 351                 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0
 352                 1 0 0 1 0 1 0 1 0 0 0 0 0 0 0 1
 353                 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 354                 0 0 0 0 1 1 0 0 0 0 0 0 1 1 1 1
 355                 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0
 356                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 357                 0 0 0 0 1 1 1 1 0 1 0 0 0 0 0 1
 358                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 359                 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0
 360                 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
 361                 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 362                 1 1 0 0 1 1 1 1 1 1 0 1 1 1 1 1
 363                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 364                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 365                 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0
 366                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 367                 0 0 0 0 0 1 1 0 0 0 1 0 0 1 1 0
 368                 1 1 0 0 1 1 1 1 0 0 0 0 0 1 0 1
 369                 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
 370                 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1
 371                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 372                 0 0 0 1 0 1 1 1 0 1 0 1 1 1 1 1
 373                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1
 374                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 375                 0 1 0 0 0 1 1 0 0 0 0 0 1 0 0 1
 376                 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 377                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1
 378                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 379                 0 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0
 380                 1 0 1 0 0 1 1 1 0 1 1 1 1 1 1 1
 381                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 382                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 383                 0 0 0 0 1 1 1 1 0 0 0 0 0 1 0 0
 384                 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1
 385                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 386                 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 387                 0 0 0 0 1 1 1 0 1 1 1 0 0 1 1 0
 388                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 389                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 390                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 391                 0 0 0 0 1 1 1 1 1 1 1 0 1 1 0 0
 392                 1 0 0 0 1 1 1 1 0 1 0 0 1 1 1 1
 393                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 394                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 395                 0 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1
 396                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 397                 0 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1
 398                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 399                 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0
 400                 1 0 0 1 1 1 0 1 0 0 0 0 1 1 1 1
 401                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 402                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
 403                ;; g_10
 404                (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 405                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 406                 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0
 407                 1 1 1 1 0 0 1 1 0 1 0 1 1 1 1 1
 408                 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0
 409                 0 0 0 1 0 1 1 1 1 0 0 1 1 1 1 1
 410                 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1
 411                 0 0 0 0 0 1 0 1 1 1 1 1 1 1 1 1
 412                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 413                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
 414                 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1
 415                 0 0 1 1 0 0 1 1 1 1 0 1 0 1 1 1
 416                 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1
 417                 0 1 0 1 1 1 1 1 0 0 1 1 1 1 1 1
 418                 0 0 0 1 0 1 1 1 0 0 1 1 0 0 1 1
 419                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 420                 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
 421                 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0
 422                 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0
 423                 0 0 0 1 0 0 0 1 0 1 0 1 0 1 1 1
 424                 0 0 0 0 0 1 0 1 0 0 1 0 0 1 0 1
 425                 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 1
 426                 0 0 1 1 0 1 0 1 1 0 1 1 1 1 1 1
 427                 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 428                 0 0 0 0 0 1 1 1 0 1 1 0 1 1 1 1
 429                 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0
 430                 0 0 0 1 0 1 1 1 0 0 0 0 0 1 1 0
 431                 1 1 1 1 1 0 1 0 1 1 1 0 1 0 0 0
 432                 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1
 433                 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1
 434                 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 435                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
 436                ;; g_20
 437                (0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
 438                 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
 439                 0 1 0 0 0 0 1 1 0 0 1 0 1 1 1 0
 440                 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1)
 441                ;; g_40
 442                (0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 443                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1
 444                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1
 445                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1
 446                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 447                 0 0 0 0 0 0 0 0 0 1 0 0 1 1 1 0
 448                 1 1 1 0 0 1 0 0 0 0 0 0 1 1 0 1
 449                 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1
 450                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 451                 0 1 0 0 0 1 0 0 0 1 0 0 1 1 1 1
 452                 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0
 453                 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
 454                 1 0 1 0 1 1 1 0 1 0 1 0 1 1 1 1
 455                 0 1 0 0 0 1 0 1 0 1 1 1 1 1 1 1
 456                 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1
 457                 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 458                 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1
 459                 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1
 460                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 461                 0 0 0 1 1 1 0 0 1 1 0 1 1 1 0 1
 462                 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1
 463                 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
 464                 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
 465                 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1
 466                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
 467                 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
 468                 0 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1
 469                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 470                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 471                 0 0 0 1 1 1 0 0 1 1 1 1 1 1 1 1
 472                 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 473                 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 474                 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1
 475                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 476                 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1
 477                 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 1
 478                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
 479                 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1 1
 480                 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1
 481                 0 0 0 0 0 1 0 1 0 1 1 1 1 1 1 1
 482                 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1
 483                 0 1 0 0 0 0 0 1 0 1 0 1 0 1 1 1
 484                 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
 485                 0 0 0 0 0 1 0 1 0 1 1 1 0 1 1 1
 486                 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 1
 487                 0 1 0 0 1 1 0 1 1 1 1 1 1 1 1 1
 488                 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 489                 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 490                 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 491                 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1
 492                 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1
 493                 0 0 0 0 0 1 0 1 0 1 1 1 1 1 0 1
 494                 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1
 495                 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1
 496                 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0
 497                 0 0 0 0 1 1 0 1 1 1 1 1 1 1 0 1
 498                 0 0 0 0 0 1 0 0 0 0 0 0 1 1 1 1
 499                 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 1
 500                 0 0 0 0 0 1 1 1 0 1 1 1 1 1 1 1
 501                 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1 1
 502                 0 0 0 0 1 1 0 1 0 1 1 1 1 1 1 1
 503                 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
 504                 0 1 0 0 1 1 0 1 0 1 1 1 1 1 0 1
 505                 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1))
 506               (;; g_01
 507                (0 0 1 1 0 1 1 1 0 1 1 1 0 0 1 1
 508                 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1
 509                 0 1 0 1 0 1 1 1 0 1 1 1 1 1 1 1
 510                 1 1 1 1 0 1 0 1 1 1 1 1 1 0 1 1
 511                 0 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1
 512                 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0 1
 513                 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
 514                 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
 515                ;; g_11
 516                (0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1
 517                 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 1)
 518                ;; g_21
 519                (0 0 0 1 0 1 1 1)
 520                ;; g_41
 521                (0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
 522                 0 0 0 0 0 0 0 1 0 0 0 1 1 1 1 1
 523                 0 0 0 0 0 0 1 1 0 0 0 1 1 1 1 1
 524                 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1))
 525               (;; g_02
 526                (0 1 0 1)
 527                ;; g_12
 528                (0 1)
 529                ;; g_22
 530                (0)
 531                ;; g_42
 532                (0 0 0 1))))
 533     "Static prediction table for X-Face image compression algorithm.")
 534
 535   ;; Macros for inlining critical values.
 536   (defmacro uncompface-width () (list 'quote uncompface-width))
 537   (defmacro uncompface-height () (list 'quote uncompface-height))
 538   (defmacro uncompface-guesses () (list 'quote uncompface-guesses))
 539
 540   (defmacro uncompface-loop (&rest body)
 541     "Eval BODY and repeat if last expression of BODY yields non-nil."
 542     (list 'while (cons 'progn body))))
 543
 544 ;; (defun uncompface-print-bignum (bignum &optional prefix)
 545 ;;   (princ (format (concat prefix "<%s>\n")
 546 ;;               (mapconcat (lambda (x) (format "%02x" x))
 547 ;;                          (reverse bignum) " "))))
 548
 549 ;; Shut up the byte-compiler.
 550 ;; These variables are once bound in `uncompface' and all subfunctions
 551 ;; accesses them directly rather than creating their own bindings.
 552 (eval-when-compile
 553   (defvar bignum)
 554   (defvar face))
 555
 556 ;; Big-number facilities.
 557 ;; These functions were used to be implemented with `lsh' and `logand',
 558 ;; but rewritten to use `/' and `%'.  The last two are mapped into
 559 ;; byte-code directly, but the formers are normal functions even in
 560 ;; compiled code which involve expensive `funcall' operations.
 561 (eval-when-compile
 562   (defsubst uncompface-big-mul-add (multiplier adder)
 563     "Multiply BIGNUM by MULTIPLIER and add ADDER and put result in `bignum'."
 564     (setq bignum (if (= multiplier 0)
 565                      (cons 0 bignum)
 566                    (prog1 bignum
 567                      (while (progn
 568                               (setcar bignum (% (setq adder (+ (* (car bignum)
 569                                                                   multiplier)
 570                                                                adder))
 571                                                 256))
 572                               (setq adder (/ adder 256))
 573                               (cdr bignum))
 574                        (setq bignum (cdr bignum)))
 575                      (or (= adder 0)
 576                          (setcdr bignum (list adder))))))))
 577
 578 ;; This trick is for XEmacs 21.4 which doesn't allow inlining a function
 579 ;; using `defsubst' into another function also defined with `defsubst'.
 580 (eval-when-compile
 581   (when (featurep 'xemacs)
 582     (defvar uncompface-big-mul-add (symbol-function 'uncompface-big-mul-add))
 583     (defmacro uncompface-big-mul-add (multiplier adder)
 584       `(,uncompface-big-mul-add ,multiplier ,adder))))
 585
 586 ;; Separate `eval-when-compile' for the byte compiler
 587 ;; to properly define `uncompface-big-mul-add' before `uncompface-big-pop'.
 588 (eval-when-compile
 589   (defsubst uncompface-big-pop (prob)
 590     (let ((n (car bignum)) (i 0))
 591       (if (cdr bignum)
 592           (setq bignum (cdr bignum))
 593         (setcar bignum 0))
 594       (while (or (< n (cdr (car prob)))
 595                  (>= n (+ (cdr (car prob)) (car (car prob)))))
 596         (setq prob (cdr prob)
 597               i (1+ i)))
 598       (uncompface-big-mul-add (car (car prob)) (- n (cdr (car prob))))
 599       i)))
 600
 601 ;; This function cannot be inlined due to recursive calls.
 602 (defun uncompface-pop-grays (offset size)
 603   (if (<= size 3)
 604       (let ((bits (uncompface-big-pop
 605                    ;; This is freqs[16] in compface_private.h.
 606                    '(( 0 .   0) (38 .   0) (38 .  38) (13 . 152)
 607                      (38 .  76) (13 . 165) (13 . 178) ( 6 . 230)
 608                      (38 . 114) (13 . 191) (13 . 204) ( 6 . 236)
 609                      (13 . 217) ( 6 . 242) ( 5 . 248) ( 3 . 253)))))
 610 ;;      (if (/= (logand bits 1) 0)
 611 ;;          (aset face offset t))
 612 ;;      (if (/= (logand bits 2) 0)
 613 ;;          (aset face (1+ offset) t))
 614 ;;      (if (/= (logand bits 4) 0)
 615 ;;          (aset face (+ offset (uncompface-width)) t))
 616 ;;      (if (/= (logand bits 8) 0)
 617 ;;          (aset face (+ offset (uncompface-width) 1) t))
 618         (when (>= bits 8)
 619           (aset face (+ offset (uncompface-width) 1) t)
 620           (setq bits (- bits 8)))
 621         (when (>= bits 4)
 622           (aset face (+ offset (uncompface-width)) t)
 623           (setq bits (- bits 4)))
 624         (or (eq (if (< bits 2)
 625                     bits
 626                   (aset face (1+ offset) t)
 627                   (- bits 2))
 628                 0)
 629             (aset face offset t))
 630         )
 631     (setq size (/ size 2))
 632     (uncompface-pop-grays offset size)
 633     (uncompface-pop-grays (+ offset size) size)
 634     (uncompface-pop-grays (+ offset (* (uncompface-width) size)) size)
 635     (uncompface-pop-grays (+ offset (* (uncompface-width) size) size) size)))
 636
 637 ;; Again, this function call itself recursively.
 638 (defun uncompface-uncompress (offset size level)
 639   ;; This used to be (funcall (aref [(lambda ...) ...] (u-big-pop ...)))
 640   ;; but this was slow due to function call.
 641   (let ((i (uncompface-big-pop (car level))))
 642     (cond ((eq i 0)                     ; black
 643            (uncompface-pop-grays offset size))
 644           ((eq i 1)                     ; gray
 645            (setq size (/ size 2)
 646                  level (cdr level))
 647            (uncompface-uncompress offset size level)
 648            (uncompface-uncompress (+ offset size) size level)
 649            (uncompface-uncompress (+ offset (* size (uncompface-width)))
 650                                   size level)
 651            (uncompface-uncompress (+ offset (* size (uncompface-width)) size)
 652                                   size level))
 653           ;; ((eq i 2) nil)
 654           ;; (t (error "Cannot happen"))
 655           )))
 656
 657 (eval-when-compile
 658   (defmacro uncompface-shift-in (k dy dx)
 659     `(+ k k (if (aref face (+ i (* ,dy (uncompface-width)) ,dx)) 1 0))))
 660
 661 (defun uncompface-internal (string &optional raw)
 662   "Decode X-Face data STRING and return an image in the pbm format.
 663 If the optional RAW is non-nil, return a raw bitmap as a vector."
 664   (let (;; `bignum' and `face' are semi-global variables.
 665         ;; Do not use '(0) below, because BIGNUM is modified in-place.
 666         (bignum (list 0))
 667         (face (make-vector (* (uncompface-width) (uncompface-height)) nil))
 668         ;;(uncompface-big-shift -16)
 669         ;;(uncompface-big-mask 65535)
 670         (y 0) x)
 671     (mapc (lambda (c)
 672             (and (>= c ?!) (<= c ?~)
 673                  (uncompface-big-mul-add (1+ (- ?~ ?!)) (- c ?!))))
 674           string)
 675     ;;(uncompface-print-bignum bignum)
 676     ;;(setq y 0)
 677     (uncompface-loop
 678       (setq x 0)
 679       (uncompface-loop
 680         (uncompface-uncompress (+ (* (uncompface-width) y) x) 16
 681                                ;; This is levels[4][3] in compface_private.h.
 682                                '(;; Top of tree almost always grey
 683                                  ((  1 . 255) (251 .   0) (  4 . 251))
 684                                  ((  1 . 255) (200 .   0) ( 55 . 200))
 685                                  (( 33 . 223) (159 .   0) ( 64 . 159))
 686                                  ;; Grey disallowed at bottom
 687                                  ((131 .   0) (  0 .   0) (125 . 131))))
 688         (< (setq x (+ x 16)) (uncompface-width)))
 689       (< (setq y (+ y 16)) (uncompface-height)))
 690     (setq y 0)
 691     (let ((i 0) guesses k)
 692       (uncompface-loop
 693         (setq guesses (cond ((= y 1) (nth 2 (uncompface-guesses)))
 694                             ((= y 2) (nth 1 (uncompface-guesses)))
 695                             (t       (nth 0 (uncompface-guesses))))
 696               x 0)
 697         (uncompface-loop
 698           (setq k 0)
 699           (when (>= x 1)
 700             (when (>= x 2)
 701               (when (>= x 3)
 702                 (when (>= y 1)
 703                   (when (>= y 2)
 704                     (when (>= y 3)
 705                       (setq k (uncompface-shift-in k -2 -2)))
 706                     (setq k (uncompface-shift-in k -1 -2)))
 707                   (setq k (uncompface-shift-in k 0 -2))))
 708               (when (>= y 1)
 709                 (when (>= y 2)
 710                   (when (>= y 3)
 711                     (setq k (uncompface-shift-in k -2 -1)))
 712                   (setq k (uncompface-shift-in k -1 -1)))
 713                 (setq k (uncompface-shift-in k 0 -1))))
 714             (when (>= y 2)
 715               (when (>= y 3)
 716                 (setq k (uncompface-shift-in k -2 0)))
 717               (setq k (uncompface-shift-in k -1 0)))
 718             (when (>= y 2)
 719               (when (>= y 3)
 720                 (setq k (uncompface-shift-in k -2 1)))
 721               (setq k (uncompface-shift-in k -1 1)))
 722             (when (<= x (- (uncompface-width) 2))
 723               (when (>= y 2)
 724                 (when (>= y 3)
 725                   (setq k (uncompface-shift-in k -2 2)))
 726                 (setq k (uncompface-shift-in k -1 2)))))
 727           (if (aref (car (cond ((= x 1)
 728                                 (cdr (cdr guesses)))
 729                                ((= x 2)
 730                                 (cdr guesses))
 731                                ((= x (1- (uncompface-width)))
 732                                 (cdr (cdr (cdr guesses))))
 733                                (t
 734                                 guesses))) k)
 735               (aset face i (not (aref face i))))
 736           (setq i (1+ i))
 737           (< (setq x (1+ x)) (uncompface-width)))
 738         (< (setq y (1+ y)) (uncompface-height))))
 739     (if raw
 740         face
 741       (concat (eval-when-compile
 742                 (format "P1\n%d %d\n" uncompface-width uncompface-height))
 743               (mapconcat (lambda (bit) (if bit "1" "0")) face " ")
 744               "\n"))))
 745
 746 (provide 'compface)
 747
 748 ;; Local variables:
 749 ;; eval: (put 'uncompface-loop 'lisp-indent-hook 0)
 750 ;; End:
 751
 752 ;;; compface.el ends here