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date Mon, 13 Aug 2007 08:46:56 +0200
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3:30df88044ec6 4:b82b59fe008d
1 ;; bitmap.el -- bitmap (xbm) file handler on Mule
2
3 ;; Copyright (C) 1992 Electrotechnical Laboratory, JAPAN.
4 ;; Copyright (C) 1996 UENO Hiroshi
5 ;; Copyright (C) 1996 MORIOKA Tomohiko
6
7 ;; Author: Ken'ichi HANDA <handa@etl.go.jp>
8 ;; Hiroshi Ueno <jl07715@yamato.ibm.co.jp>
9 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
10 ;; Version:
11 ;; $Id: bitmap.el,v 1.1.1.1 1996/12/18 03:55:31 steve Exp $
12 ;; Keywords: bitmap, xbm, X-Face, Mule
13
14 ;; This file is part of tl (Tiny Library).
15
16 ;; This program is free software; you can redistribute it and/or modify
17 ;; it under the terms of the GNU General Public License as published by
18 ;; the Free Software Foundation; either version 2, or (at your option)
19 ;; any later version.
20
21 ;; This program is distributed in the hope that it will be useful,
22 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
23 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 ;; GNU General Public License for more details.
25
26 ;; You should have received a copy of the GNU General Public License
27 ;; along with this program; if not, write to the Free Software
28 ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29
30 ;; Code:
31
32 (require 'tl-822)
33
34 (defvar lc-bitmap
35 (new-private-character-set 2 1 3 0 ?0 0 "BITMAP 8x16" "bitmap")
36 "Leading character for BITMAP.8x16.")
37
38 (mapcar (lambda (fontset)
39 (if (= (fontset-pixel-size fontset) 16)
40 (set-fontset-font
41 fontset lc-bitmap
42 "-etl-fixed-medium-r-*--16-*-100-100-m-*-bitmap.8x16-0")
43 ))
44 (fontset-list))
45
46 ;; Block (all bits set) character
47 (defvar bitmap-block (make-character lc-bitmap 32 33))
48
49 ;; Simple examples:
50 ;; (bitmap-compose "00FF00FF00FF00FF00FF00FF00FF00FF")
51 ;; (bitmap-compose
52 ;; "FF00FF00FF00FF00FF00FF00FF00FF00AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA")
53
54 (defun read-hexa (str)
55 (let ((result 0) (i 0) (max (length str)))
56 (while (< i max)
57 (let ((ch (aref str i)))
58 (cond((and (<= ?0 ch) (<= ch ?9))
59 (setq result (+ (* result 16) (- ch ?0))))
60 ((and (<= ?a ch) (<= ch ?f))
61 (setq result (+ (* result 16) (+ (- ch ?a) 10))))
62 ((and (<= ?A ch) (<= ch ?F))
63 (setq result (+ (* result 16) (+ (- ch ?A) 10)))))
64 (setq i (1+ i))))
65 result))
66
67 (defun bitmap-compose (hex)
68 "Return a string of composite characters which represents BITMAP-PATTERN.
69 BITMAP-PATTERN is a string of hexa decimal for 8x16 dot-pattern.
70 For example the pattern \"0081814242242442111124244242818100\" is
71 for a bitmap of shape something like 'X' character."
72 (let* ((len (/ (length hex) 2))
73 (bytes (char-bytes lc-bitmap))
74 (cmpstr "")
75 (buf (make-string 64 0))
76 block-flag i j row code c1 c2)
77 (setq i 0 j 0 block-flag t)
78 (while (< i len)
79 (setq row (read-hexa (substring hex (* i 2) (+ (* i 2) 2))))
80 (if block-flag
81 (setq block-flag (= row 255)))
82 (if (/= row 0)
83 (progn
84 (setq code (+ (* (% i 16) 255) row -1))
85 (setq c1 (+ (/ code 96) 33)
86 c2 (+ (% code 96) 32))
87 (sset buf j (make-character lc-bitmap c1 c2))
88 (setq j (+ j bytes))))
89 (setq i (1+ i))
90 (if (or (= (% i 16) 0) (>= i len))
91 (setq cmpstr
92 (concat cmpstr
93 (if (and block-flag (= j 64))
94 (char-to-string bitmap-block)
95 (if (= j 0)
96 " "
97 (compose-string (substring buf 0 j)))))
98 block-flag t
99 j 0)))
100 cmpstr))
101
102
103 ;;; @ BDF
104 ;;;
105
106 ;; Internal variables -- declared here to reduce garbage collection.
107 (defconst *hex* (vector (make-string 96 0) (make-string 96 0)))
108 (defconst *hex-len* (length *hex*))
109 (defconst *cmp* (make-vector *hex-len* nil))
110
111 (defun bdf-to-bitmap (bdf)
112 "Set *cmp* a vector of string for BDF.
113 BDF is a vector of string, each elements corresponds to a line of bitmap
114 of difinition of a character glyph in bdf file."
115 (let ((width (length (aref bdf 0)))
116 (height (length bdf))
117 i j)
118 (if (or (/= (/ (+ height 15) 16) *hex-len*)
119 (/= width (length (aref *hex* 0))))
120 (progn
121 (setq *hex-len* (/ (+ height 15) 16))
122 (setq *hex* (make-vector *hex-len* nil))
123 (setq *cmp* (make-vector *hex-len* nil))
124 (setq i 0)
125 (while (< i *hex-len*)
126 (aset *hex* i (make-string 96 0))
127 (setq i (1+ i)))))
128 (setq j 0)
129 (while (< j width)
130 (setq i 0)
131 (while (< i (* *hex-len* 16))
132 (aset (aref *hex* (/ i 16))
133 (+ (* (/ j 2) 32) (* (% i 16) 2) (% j 2))
134 (if (< i height) (aref (aref bdf i) j) 0))
135 (setq i (1+ i)))
136 (setq j (1+ j)))
137 (setq i 0)
138 (while (< i *hex-len*)
139 (aset *cmp* i (bitmap-compose (aref *hex* i)))
140 (setq i (1+ i)))
141 *cmp*
142 ))
143
144
145 ;;; @ XBM
146 ;;;
147
148 (defun bitmap-show-xbm (buf)
149 "Show bitmap in buffer BUF. Very slow! [bitmap.el]"
150 (let ((hexa-string "0123456789ABCDEF")
151 (reverse-bit '[0 8 4 12 2 10 6 14 1 9 5 13 3 11 7 15])
152 i j w h bitmap cmp c temp)
153 (save-excursion
154 (set-buffer buf)
155 (goto-char 1)
156 (search-forward "width " nil t)
157 (setq w (read (current-buffer)))
158 (goto-char 1)
159 (search-forward "height " nil t)
160 (setq h (read (current-buffer)))
161 (search-forward "0x" nil t)
162 (setq bitmap (make-vector h 0))
163 (setq cmp (make-vector (/ (+ h 15) 16) nil))
164 (setq j 0)
165 (setq w (/ (+ w 7) 8))
166 (while (< j h)
167 (aset bitmap j (make-vector w 0))
168 (setq j (1+ j)))
169 (setq j 0)
170 (message "%dx%d" w h)
171 (while (< j h)
172 (setq i 0)
173 (while (< i w)
174 (setq temp (buffer-substring (point) (+ (point) 2)))
175 (aset (aref bitmap j) i temp)
176 (setq c (read-hexa temp))
177 (aset temp 0 (aref hexa-string (aref reverse-bit (% c 16))))
178 (aset temp 1 (aref hexa-string (aref reverse-bit (/ c 16))))
179 (setq i (1+ i))
180 (search-forward "0x" nil t))
181 (setq j (1+ j)))
182 (message "bitmap translating...")
183 (setq i 0)
184 (while (< i w)
185 (setq j 0)
186 (while (< j h)
187 (aset cmp (/ j 16)
188 (concat (aref cmp (/ j 16))
189 (aref (aref bitmap j) i)))
190 (setq j (1+ j)))
191 (if (> (% h 16) 0)
192 (aset cmp (/ h 16)
193 (concat (aref cmp (/ h 16))
194 (make-string (* (- 16 (% h 16)) 2) ?0))))
195 (setq i (1+ i)))
196 (message "cmp created"))
197 (setq j 0)
198 (while (< j (length cmp))
199 (insert (bitmap-compose (aref cmp j)) ?\n)
200 ;;(insert (aref cmp j) ?\n)
201 (setq j (1+ j)))))
202
203 (defun bitmap-read-xbm (file)
204 "Read .xbm file and show the bitmap.
205 Very slow! [bitmap.el]"
206 (interactive "fBitmap-file: ")
207 (bitmap-show-xbm (find-file-noselect (expand-file-name file)))
208 )
209
210
211 ;;; @ X-Face
212 ;;;
213
214 (defvar bitmap-uncompface-program "uncompface")
215
216 (defun bitmap-decode-x-face ()
217 (save-restriction
218 (rfc822/narrow-to-header)
219 (goto-char (point-min))
220 (if (re-search-forward "^X-Face:[ \t]*" nil t)
221 (let ((p (match-beginning 0))
222 (beg (match-end 0))
223 (end (rfc822/field-end))
224 (cur-buf (current-buffer))
225 )
226 (if (< end (point-max))
227 (setq end (1+ end))
228 )
229 (save-restriction
230 (narrow-to-region p end)
231 (delete-region p beg)
232 (call-process-region p (point-max)
233 bitmap-uncompface-program t t nil)
234 (let (i k k+6 cmp temp)
235 (goto-char (point-min))
236 (search-forward "0x" nil t)
237 (setq cmp (make-vector 18 nil))
238 (setq i 0)
239 (while (< i 48)
240 (setq k (* (/ i 16) 6))
241 (setq k+6 (+ k 6))
242 (while (< k k+6)
243 (setq temp (buffer-substring (point) (+ (point) 2)))
244 (aset cmp k (concat (aref cmp k) temp))
245 (setq k (1+ k))
246 (setq temp (buffer-substring (+ (point) 2) (+ (point) 4)))
247 (aset cmp k (concat (aref cmp k) temp))
248 (setq k (1+ k))
249 (search-forward "0x" nil t)
250 )
251 (setq i (1+ i)))
252 (delete-region (point-min)(point-max))
253 (insert "X-Face: ")
254 (setq k 0)
255 (while (< k 6)
256 (insert (bitmap-compose (aref cmp k)))
257 (setq k (1+ k))
258 )
259 (insert ?\n)
260 (setq i 1)
261 (while (< i 3)
262 (insert " ")
263 (setq k (* i 6)
264 k+6 (+ k 6))
265 (while (< k k+6)
266 (insert (bitmap-compose (aref cmp k)))
267 (setq k (1+ k))
268 )
269 (insert ?\n)
270 (setq i (1+ i))
271 )))))))
272
273
274 ;;; @ end
275 ;;;
276
277 (provide 'bitmap)
278
279 ;;; bitmap.el ends here