1 ;;; compface.el --- functions for converting X-Face headers
2 ;; Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; TAKAI Kousuke <tak@kmc.gr.jp>
8 ;; This file is part of GNU Emacs.
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 2, or (at your option)
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.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
29 (defgroup compface nil
30 "X-Face image conversion."
33 (defcustom uncompface-use-external (and (not noninteractive)
34 (executable-find "uncompface")
35 (executable-find "icontopbm")
37 "*Specify which of the internal or the external decoder should be used.
38 nil means to use the internal ELisp-based uncompface program. t means
39 to use the external decoder. In the later case, you need to have the
40 external `uncompface' and `icontopbm' programs installed. The default
41 value is nil if those external programs aren't available, otherwise
42 `undecided' which means to determine it by checking whether the host
43 machine is slow. See also `uncompface-use-external-threshold'. You
44 can skip that check by setting this value as nil or t explicitly."
45 :type '(choice (const :tag "Use the internal decoder" nil)
46 (const :tag "Use the external decoder" t)
47 (const :tag "Autodetection" undecided))
50 (defcustom uncompface-use-external-threshold 0.1
51 "*Number of seconds to check whether the host machine is slow.
52 If the host takes time larger than this value for decoding an X-Face
53 using the internal ELisp-based uncompface program, it will be changed
54 to using the external `uncompface' and `icontopbm' programs if they
55 are available. Note that the measurement may never be exact."
60 (defmacro uncompface-float-time (&optional specified-time)
61 (if (fboundp 'float-time)
62 `(float-time ,specified-time)
63 `(let ((time (or ,specified-time (current-time))))
64 (+ (* (car time) 65536.0)
66 (cond ((consp (setq time (cddr time)))
67 (/ (car time) 1000000.0))
73 (defun uncompface (face)
75 If `uncompface-use-external' is t, it requires the external programs
76 `uncompface', and `icontopbm'. On a GNU/Linux system these might be
77 in packages with names like `compface' or `faces-xface' and `netpbm'
78 or `libgr-progs', for instance."
79 (cond ((eq uncompface-use-external nil)
80 (uncompface-internal face))
81 ((eq uncompface-use-external t)
84 (and (eq 0 (apply 'call-process-region (point-min) (point-max)
86 'delete '(t nil) nil))
88 (goto-char (point-min))
89 (insert "/* Width=48, Height=48 */\n")
90 ;; I just can't get "icontopbm" to work correctly on its
91 ;; own in XEmacs. And Emacs doesn't understand un-raw pbm
93 (if (not (featurep 'xemacs))
94 (eq 0 (call-process-region (point-min) (point-max)
97 (shell-command-on-region (point-min) (point-max)
98 "icontopbm | pnmnoraw"
103 (let* ((gc-cons-threshold (eval '(lsh -1 -1)))
104 (start (current-time)))
106 (uncompface-internal face)
107 (setq uncompface-use-external
108 (and (> (- (uncompface-float-time (current-time))
109 (uncompface-float-time start))
110 uncompface-use-external-threshold)
111 (executable-find "uncompface")
112 (executable-find "icontopbm")
114 (message "Setting `uncompface-use-external' to `%s'"
115 uncompface-use-external))))))
117 ;; The following section is a bug-for-bug compatible version of
118 ;; `uncompface' program entirely implemented in Emacs-Lisp.
121 ;; The size of 48x48 is actually hard-coded into the code itself,
122 ;; so you cannot simply change those values. So we hard-code
123 ;; them into the compiled code.
124 (defconst uncompface-width 48
125 "Width of X-Face bitmap image.")
126 (defconst uncompface-height 48
127 "Height of X-Face bitmap image.")
129 ;; Again, this is also hard-coded into the compiled code.
130 (defconst uncompface-guesses
133 (let ((vector (make-vector (length x) nil))
143 (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
144 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
145 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
146 1 1 1 0 0 0 1 1 1 1 0 1 1 1 1 1
147 0 0 0 0 0 1 0 1 0 0 0 1 0 1 1 1
148 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
149 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1
150 0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 1
151 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
152 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
153 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
154 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 1
155 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
156 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
157 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1
158 0 1 0 0 0 1 0 1 0 0 1 0 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 1 1 0 1
161 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
162 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
163 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
164 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
165 0 0 0 0 0 0 0 1 0 0 1 1 1 1 1 1
166 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
167 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1
168 1 0 0 0 0 0 0 0 1 1 0 0 1 0 0 1
169 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
170 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
171 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
172 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
173 0 0 0 1 1 0 1 1 0 0 0 1 1 1 1 1
174 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
175 0 1 0 0 1 1 1 1 0 1 0 1 0 1 0 0
176 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 1
177 0 1 0 1 0 1 1 1 0 1 0 0 0 1 1 1
178 1 1 0 1 0 1 1 1 0 0 1 1 1 1 0 1
179 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
180 0 1 0 1 1 1 1 1 0 0 0 1 1 1 1 1
181 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
182 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
183 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
184 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1
185 0 0 0 0 1 1 1 1 0 1 0 1 1 1 1 1
186 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1
187 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
188 0 1 0 1 1 1 1 1 0 0 0 1 1 1 0 1
189 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
190 0 0 0 0 1 1 1 1 0 0 0 1 1 1 1 1
191 0 0 0 0 1 1 1 1 0 1 0 1 1 1 1 1
192 0 0 0 0 0 0 1 1 0 0 0 1 1 1 1 1
193 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
194 1 1 1 1 0 1 1 1 0 1 1 1 1 1 1 1
195 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
196 0 0 0 0 1 1 0 1 0 0 0 0 1 1 1 1
197 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
198 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1
199 0 0 0 0 1 1 1 1 0 1 0 0 1 1 1 1
200 1 1 0 1 0 1 1 1 0 0 1 1 1 1 1 1
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202 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
203 0 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1
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221 0 0 0 1 1 1 1 1 1 0 1 1 0 1 1 1
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224 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
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226 1 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1
227 0 0 0 0 0 1 0 1 0 0 0 1 0 1 0 1
228 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1
229 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
230 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1
231 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1
232 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
233 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
234 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
235 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0
236 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1
237 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
238 1 0 0 1 1 1 1 1 1 0 0 0 1 1 1 1
239 0 1 0 0 1 0 1 0 0 1 0 0 0 0 0 0
240 0 1 0 1 1 1 1 1 0 1 0 1 1 1 1 1
241 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
242 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
243 0 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1
244 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
245 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
246 0 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1
247 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 1
248 1 1 0 1 0 1 1 1 0 1 0 1 1 1 1 1
249 0 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
250 0 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1
251 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
252 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
253 1 1 1 1 1 1 1 1 0 1 1 1 0 1 1 1
254 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1
255 0 1 0 0 1 1 1 1 1 1 1 0 1 1 1 1
256 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
257 0 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1
258 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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310 1 0 0 1 0 1 0 1 0 1 0 0 1 1 1 1
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325 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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327 0 1 0 0 1 1 1 1 0 1 1 0 1 1 1 1
328 1 1 0 1 1 0 0 0 0 1 0 1 1 1 1 1
329 0 0 0 0 1 1 1 1 0 1 1 1 1 1 1 1
330 1 1 0 1 1 1 1 1 0 1 0 1 1 1 1 1
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334 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
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365 1 1 0 0 1 1 1 1 0 1 1 1 1 1 1 1
366 1 1 0 1 1 1 1 1 1 1 0 1 1 1 1 1
367 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
368 0 0 0 1 0 1 1 1 0 1 0 1 1 1 1 1
369 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1
370 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
371 0 1 0 0 0 1 1 0 0 0 0 0 1 0 0 1
372 0 1 0 0 1 1 1 1 0 1 0 1 1 1 1 1
373 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1
374 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
375 0 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0
376 1 0 1 0 0 1 1 1 0 1 1 1 1 1 1 1
377 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
378 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
379 0 0 0 0 1 1 1 1 0 0 0 0 0 1 0 0
380 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1
381 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
382 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
383 0 0 0 0 1 1 1 0 1 1 1 0 0 1 1 0
384 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
385 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
386 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
387 0 0 0 0 1 1 1 1 1 1 1 0 1 1 0 0
388 1 0 0 0 1 1 1 1 0 1 0 0 1 1 1 1
389 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
390 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
391 0 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1
392 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1
393 0 1 1 0 1 1 1 1 0 1 1 1 1 1 1 1
394 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
395 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0
396 1 0 0 1 1 1 0 1 0 0 0 0 1 1 1 1
397 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
398 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
400 (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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403 1 1 1 1 0 0 1 1 0 1 0 1 1 1 1 1
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429 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1
430 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
431 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
433 (0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
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436 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1)
438 (0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
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480 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1
481 0 0 0 0 0 1 0 1 0 1 1 1 0 1 1 1
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483 0 1 0 0 1 1 0 1 1 1 1 1 1 1 1 1
484 0 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1
485 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
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495 0 0 0 0 0 1 1 1 0 0 0 1 1 1 1 1
496 0 0 0 0 0 1 1 1 0 1 1 1 1 1 1 1
497 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1 1
498 0 0 0 0 1 1 0 1 0 1 1 1 1 1 1 1
499 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
500 0 1 0 0 1 1 0 1 0 1 1 1 1 1 0 1
501 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1))
503 (0 0 1 1 0 1 1 1 0 1 1 1 0 0 1 1
504 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1
505 0 1 0 1 0 1 1 1 0 1 1 1 1 1 1 1
506 1 1 1 1 0 1 0 1 1 1 1 1 1 0 1 1
507 0 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1
508 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0 1
509 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
510 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1)
512 (0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1
513 0 0 0 0 0 0 1 1 0 1 1 1 1 1 1 1)
517 (0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
518 0 0 0 0 0 0 0 1 0 0 0 1 1 1 1 1
519 0 0 0 0 0 0 1 1 0 0 0 1 1 1 1 1
520 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1))
529 "Static prediction table for X-Face image compression algorithm.")
531 ;; Macros for inlining critical values.
532 (defmacro uncompface-width () (list 'quote uncompface-width))
533 (defmacro uncompface-height () (list 'quote uncompface-height))
534 (defmacro uncompface-guesses () (list 'quote uncompface-guesses))
536 (defmacro uncompface-loop (&rest body)
537 "Eval BODY and repeat if last expression of BODY yields non-nil."
538 (list 'while (cons 'progn body))))
540 ;; (defun uncompface-print-bignum (bignum &optional prefix)
541 ;; (princ (format (concat prefix "<%s>\n")
542 ;; (mapconcat (lambda (x) (format "%02x" x))
543 ;; (reverse bignum) " "))))
545 ;; Shut up the byte-compiler.
546 ;; These variables are once bound in `uncompface' and all subfunctions
547 ;; accesses them directly rather than creating their own bindings.
552 ;; Big-number facilities.
553 ;; These functions were used to be implemented with `lsh' and `logand',
554 ;; but rewritten to use `/' and `%'. The last two are mapped into
555 ;; byte-code directly, but the formers are normal functions even in
556 ;; compiled code which involve expensive `funcall' operations.
558 (defsubst uncompface-big-mul-add (multiplier adder)
559 "Multiply BIGNUM by MULTIPLIER and add ADDER and put result in `bignum'."
560 (setq bignum (if (= multiplier 0)
564 (setcar bignum (% (setq adder (+ (* (car bignum)
568 (setq adder (/ adder 256))
570 (setq bignum (cdr bignum)))
572 (setcdr bignum (list adder))))))))
574 ;; This trick is for XEmacs 21.4 which doesn't allow inlining a function
575 ;; using `defsubst' into another function also defined with `defsubst'.
577 (when (featurep 'xemacs)
578 (defvar uncompface-big-mul-add (symbol-function 'uncompface-big-mul-add))
579 (defmacro uncompface-big-mul-add (multiplier adder)
580 `(,uncompface-big-mul-add ,multiplier ,adder))))
582 ;; Separate `eval-when-compile' for the byte compiler
583 ;; to properly define `uncompface-big-mul-add' before `uncompface-big-pop'.
585 (defsubst uncompface-big-pop (prob)
586 (let ((n (car bignum)) (i 0))
588 (setq bignum (cdr bignum))
590 (while (or (< n (cdr (car prob)))
591 (>= n (+ (cdr (car prob)) (car (car prob)))))
592 (setq prob (cdr prob)
594 (uncompface-big-mul-add (car (car prob)) (- n (cdr (car prob))))
597 ;; This function cannot be inlined due to recursive calls.
598 (defun uncompface-pop-grays (offset size)
600 (let ((bits (uncompface-big-pop
601 ;; This is freqs[16] in compface_private.h.
602 '(( 0 . 0) (38 . 0) (38 . 38) (13 . 152)
603 (38 . 76) (13 . 165) (13 . 178) ( 6 . 230)
604 (38 . 114) (13 . 191) (13 . 204) ( 6 . 236)
605 (13 . 217) ( 6 . 242) ( 5 . 248) ( 3 . 253)))))
606 ;; (if (/= (logand bits 1) 0)
607 ;; (aset face offset t))
608 ;; (if (/= (logand bits 2) 0)
609 ;; (aset face (1+ offset) t))
610 ;; (if (/= (logand bits 4) 0)
611 ;; (aset face (+ offset (uncompface-width)) t))
612 ;; (if (/= (logand bits 8) 0)
613 ;; (aset face (+ offset (uncompface-width) 1) t))
615 (aset face (+ offset (uncompface-width) 1) t)
616 (setq bits (- bits 8)))
618 (aset face (+ offset (uncompface-width)) t)
619 (setq bits (- bits 4)))
620 (or (eq (if (< bits 2)
622 (aset face (1+ offset) t)
625 (aset face offset t))
627 (setq size (/ size 2))
628 (uncompface-pop-grays offset size)
629 (uncompface-pop-grays (+ offset size) size)
630 (uncompface-pop-grays (+ offset (* (uncompface-width) size)) size)
631 (uncompface-pop-grays (+ offset (* (uncompface-width) size) size) size)))
633 ;; Again, this function call itself recursively.
634 (defun uncompface-uncompress (offset size level)
635 ;; This used to be (funcall (aref [(lambda ...) ...] (u-big-pop ...)))
636 ;; but this was slow due to function call.
637 (let ((i (uncompface-big-pop (car level))))
638 (cond ((eq i 0) ; black
639 (uncompface-pop-grays offset size))
641 (setq size (/ size 2)
643 (uncompface-uncompress offset size level)
644 (uncompface-uncompress (+ offset size) size level)
645 (uncompface-uncompress (+ offset (* size (uncompface-width)))
647 (uncompface-uncompress (+ offset (* size (uncompface-width)) size)
650 ;; (t (error "Cannot happen"))
654 (defmacro uncompface-shift-in (k dy dx)
655 `(+ k k (if (aref face (+ i (* ,dy (uncompface-width)) ,dx)) 1 0))))
657 (defun uncompface-internal (string &optional raw)
658 "Decode X-Face data STRING and return an image in the pbm format.
659 If the optional RAW is non-nil, return a raw bitmap as a vector."
660 (let (;; `bignum' and `face' are semi-global variables.
661 ;; Do not use '(0) below, because BIGNUM is modified in-place.
663 (face (make-vector (* (uncompface-width) (uncompface-height)) nil))
664 ;;(uncompface-big-shift -16)
665 ;;(uncompface-big-mask 65535)
668 (and (>= c ?!) (<= c ?~)
669 (uncompface-big-mul-add (1+ (- ?~ ?!)) (- c ?!))))
671 ;;(uncompface-print-bignum bignum)
676 (uncompface-uncompress (+ (* (uncompface-width) y) x) 16
677 ;; This is levels[4][3] in compface_private.h.
678 '(;; Top of tree almost always grey
679 (( 1 . 255) (251 . 0) ( 4 . 251))
680 (( 1 . 255) (200 . 0) ( 55 . 200))
681 (( 33 . 223) (159 . 0) ( 64 . 159))
682 ;; Grey disallowed at bottom
683 ((131 . 0) ( 0 . 0) (125 . 131))))
684 (< (setq x (+ x 16)) (uncompface-width)))
685 (< (setq y (+ y 16)) (uncompface-height)))
687 (let ((i 0) guesses k)
689 (setq guesses (cond ((= y 1) (nth 2 (uncompface-guesses)))
690 ((= y 2) (nth 1 (uncompface-guesses)))
691 (t (nth 0 (uncompface-guesses))))
701 (setq k (uncompface-shift-in k -2 -2)))
702 (setq k (uncompface-shift-in k -1 -2)))
703 (setq k (uncompface-shift-in k 0 -2))))
707 (setq k (uncompface-shift-in k -2 -1)))
708 (setq k (uncompface-shift-in k -1 -1)))
709 (setq k (uncompface-shift-in k 0 -1))))
712 (setq k (uncompface-shift-in k -2 0)))
713 (setq k (uncompface-shift-in k -1 0)))
716 (setq k (uncompface-shift-in k -2 1)))
717 (setq k (uncompface-shift-in k -1 1)))
718 (when (<= x (- (uncompface-width) 2))
721 (setq k (uncompface-shift-in k -2 2)))
722 (setq k (uncompface-shift-in k -1 2)))))
723 (if (aref (car (cond ((= x 1)
727 ((= x (1- (uncompface-width)))
728 (cdr (cdr (cdr guesses))))
731 (aset face i (not (aref face i))))
733 (< (setq x (1+ x)) (uncompface-width)))
734 (< (setq y (1+ y)) (uncompface-height))))
737 (concat (eval-when-compile
738 (format "P1\n%d %d\n" uncompface-width uncompface-height))
739 (mapconcat (lambda (bit) (if bit "1" "0")) face " ")
745 ;; eval: (put 'uncompface-loop 'lisp-indent-hook 0)
748 ;;; compface.el ends here