--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/tl/bitmap.el	Mon Aug 13 08:46:56 2007 +0200
@@ -0,0 +1,279 @@
+;; bitmap.el -- bitmap (xbm) file handler on Mule
+
+;; Copyright (C) 1992 Electrotechnical Laboratory, JAPAN.
+;; Copyright (C) 1996 UENO Hiroshi
+;; Copyright (C) 1996 MORIOKA Tomohiko
+
+;; Author: Ken'ichi HANDA <handa@etl.go.jp>
+;;         Hiroshi Ueno <jl07715@yamato.ibm.co.jp>
+;;         MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Version:
+;;	$Id: bitmap.el,v 1.1.1.1 1996/12/18 03:55:31 steve Exp $
+;; Keywords: bitmap, xbm, X-Face, Mule
+
+;; This file is part of tl (Tiny Library).
+
+;; This program 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 2, or (at your option)
+;; any later version.
+
+;; This program 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 this program; if not, write to the Free Software
+;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;; Code:
+
+(require 'tl-822)
+
+(defvar lc-bitmap
+  (new-private-character-set 2 1 3 0 ?0 0 "BITMAP 8x16" "bitmap")
+  "Leading character for BITMAP.8x16.")
+
+(mapcar (lambda (fontset)
+	  (if (= (fontset-pixel-size fontset) 16)
+	      (set-fontset-font
+	       fontset lc-bitmap
+	       "-etl-fixed-medium-r-*--16-*-100-100-m-*-bitmap.8x16-0")
+	    ))
+	(fontset-list))
+
+;; Block (all bits set) character
+(defvar bitmap-block (make-character lc-bitmap 32 33))
+
+;; Simple examples:
+;;	(bitmap-compose "00FF00FF00FF00FF00FF00FF00FF00FF")
+;;	(bitmap-compose
+;;	  "FF00FF00FF00FF00FF00FF00FF00FF00AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA")
+
+(defun read-hexa (str)
+  (let ((result 0) (i 0) (max (length str)))
+    (while (< i max)
+      (let ((ch (aref str i)))
+	(cond((and (<= ?0 ch) (<= ch ?9))
+	      (setq result (+ (* result 16) (- ch ?0))))
+	     ((and (<= ?a ch) (<= ch ?f))
+	      (setq result (+ (* result 16) (+ (- ch ?a) 10))))
+  	     ((and (<= ?A ch) (<= ch ?F))
+	      (setq result (+ (* result 16) (+ (- ch ?A) 10)))))
+	(setq i (1+ i))))
+    result))
+
+(defun bitmap-compose (hex)
+  "Return a string of composite characters which represents BITMAP-PATTERN.
+BITMAP-PATTERN is a string of hexa decimal for 8x16 dot-pattern.
+For example the pattern \"0081814242242442111124244242818100\" is
+ for a bitmap of shape something like 'X' character."
+  (let* ((len (/ (length hex) 2))
+	 (bytes (char-bytes lc-bitmap))
+	 (cmpstr "")
+	 (buf (make-string 64 0))
+	 block-flag i j row code c1 c2)
+    (setq i 0 j 0 block-flag t)
+    (while (< i len)
+      (setq row (read-hexa (substring hex (* i 2) (+ (* i 2) 2))))
+      (if block-flag
+	  (setq block-flag (= row 255)))
+      (if (/= row 0)
+	  (progn
+	    (setq code (+ (* (% i 16) 255) row -1))
+	    (setq c1 (+ (/ code 96) 33)
+		  c2 (+ (% code 96) 32))
+	    (sset buf j (make-character lc-bitmap c1 c2))
+	    (setq j (+ j bytes))))
+      (setq i (1+ i))
+      (if (or (= (% i 16) 0) (>= i len))
+	  (setq cmpstr
+		(concat cmpstr
+			(if (and block-flag (= j 64))
+			    (char-to-string bitmap-block)
+			  (if (= j 0)
+			      " "
+			    (compose-string (substring buf 0 j)))))
+		block-flag t
+		j 0)))
+    cmpstr))
+
+
+;;; @ BDF
+;;;
+
+;; Internal variables  -- declared here to reduce garbage collection.
+(defconst *hex* (vector (make-string 96 0) (make-string 96 0)))
+(defconst *hex-len* (length *hex*))
+(defconst *cmp* (make-vector *hex-len* nil))
+
+(defun bdf-to-bitmap (bdf)
+  "Set *cmp* a vector of string for BDF.
+BDF is a vector of string, each elements corresponds to a line of bitmap
+of difinition of a character glyph in bdf file."
+  (let ((width (length (aref bdf 0)))
+	(height (length bdf))
+	i j)
+    (if (or (/= (/ (+ height 15) 16) *hex-len*)
+	    (/= width (length (aref *hex* 0))))
+	(progn
+	  (setq *hex-len* (/ (+ height 15) 16))
+	  (setq *hex* (make-vector *hex-len* nil))
+	  (setq *cmp* (make-vector *hex-len* nil))
+	  (setq i 0)
+	  (while (< i *hex-len*)
+	    (aset *hex* i (make-string 96 0))
+	    (setq i (1+ i)))))
+    (setq j 0)
+    (while (< j width)
+      (setq i 0)
+      (while (< i (* *hex-len* 16))
+	(aset (aref *hex* (/ i 16))
+	      (+ (* (/ j 2) 32) (* (% i 16) 2) (% j 2))
+	      (if (< i height) (aref (aref bdf i) j) 0))
+	(setq i (1+ i)))
+      (setq j (1+ j)))
+    (setq i 0)
+    (while (< i *hex-len*)
+      (aset *cmp* i (bitmap-compose (aref *hex* i)))
+      (setq i (1+ i)))
+    *cmp*
+    ))
+
+
+;;; @ XBM
+;;;
+
+(defun bitmap-show-xbm (buf)
+  "Show bitmap in buffer BUF. Very slow! [bitmap.el]"
+  (let ((hexa-string "0123456789ABCDEF")
+	(reverse-bit '[0 8 4 12 2 10 6 14 1 9 5 13 3 11 7 15])
+	i j w h bitmap cmp c temp)
+    (save-excursion
+      (set-buffer buf)
+      (goto-char 1)
+      (search-forward "width " nil t)
+      (setq w (read (current-buffer)))
+      (goto-char 1)
+      (search-forward "height " nil t)
+      (setq h (read (current-buffer)))
+      (search-forward "0x" nil t)
+      (setq bitmap (make-vector h 0))
+      (setq cmp (make-vector (/ (+ h 15) 16) nil))
+      (setq j 0)
+      (setq w (/ (+ w 7) 8))
+      (while (< j h)
+	(aset bitmap j (make-vector w 0))
+	(setq j (1+ j)))
+      (setq j 0)
+      (message "%dx%d" w h)
+      (while (< j h)
+	(setq i 0)
+	(while (< i w)
+	  (setq temp (buffer-substring (point) (+ (point) 2)))
+	  (aset (aref bitmap j) i temp)
+	  (setq c (read-hexa temp))
+	  (aset temp 0 (aref hexa-string (aref reverse-bit (% c 16))))
+	  (aset temp 1 (aref hexa-string (aref reverse-bit (/ c 16))))
+	  (setq i (1+ i))
+	  (search-forward "0x" nil t))
+	(setq j (1+ j)))
+      (message "bitmap translating...")
+      (setq i 0)
+      (while (< i w)
+	(setq j 0)
+	(while (< j h)
+	  (aset cmp (/ j 16)
+		(concat (aref cmp (/ j 16))
+			(aref (aref bitmap j) i)))
+	  (setq j (1+ j)))
+	(if (> (% h 16) 0)
+	    (aset cmp (/ h 16)
+		  (concat (aref cmp (/ h 16))
+			  (make-string (* (- 16 (% h 16)) 2) ?0))))
+	(setq i (1+ i)))
+      (message "cmp created"))
+    (setq j 0)
+    (while (< j (length cmp))
+      (insert (bitmap-compose (aref cmp j)) ?\n)
+      ;;(insert (aref cmp j) ?\n)
+      (setq j (1+ j)))))
+
+(defun bitmap-read-xbm (file)
+  "Read .xbm file and show the bitmap.
+Very slow! [bitmap.el]"
+  (interactive "fBitmap-file: ")
+  (bitmap-show-xbm (find-file-noselect (expand-file-name file)))
+  )
+
+
+;;; @ X-Face
+;;;
+
+(defvar bitmap-uncompface-program "uncompface")
+
+(defun bitmap-decode-x-face ()
+  (save-restriction
+    (rfc822/narrow-to-header)
+    (goto-char (point-min))
+    (if (re-search-forward "^X-Face:[ \t]*" nil t)
+	(let ((p (match-beginning 0))
+	      (beg (match-end 0))
+	      (end (rfc822/field-end))
+	      (cur-buf (current-buffer))
+	      )
+	  (if (< end (point-max))
+	      (setq end (1+ end))
+	    )
+	  (save-restriction
+	    (narrow-to-region p end)
+	    (delete-region p beg)
+	    (call-process-region p (point-max)
+				 bitmap-uncompface-program t t nil)
+	    (let (i k k+6 cmp temp)
+	      (goto-char (point-min))
+	      (search-forward "0x" nil t)
+	      (setq cmp (make-vector 18 nil))
+	      (setq i 0)
+	      (while (< i 48)
+		(setq k (* (/ i 16) 6))
+		(setq k+6 (+ k 6))
+		(while (< k k+6)
+		  (setq temp (buffer-substring (point) (+ (point) 2)))
+		  (aset cmp k (concat (aref cmp k) temp))
+		  (setq k (1+ k))
+		  (setq temp (buffer-substring (+ (point) 2) (+ (point) 4)))
+		  (aset cmp k (concat (aref cmp k) temp))
+		  (setq k (1+ k))
+		  (search-forward "0x" nil t)
+		  )
+		(setq i (1+ i)))
+	      (delete-region (point-min)(point-max))
+	      (insert "X-Face: ")
+	      (setq k 0)
+	      (while (< k 6)
+		(insert (bitmap-compose (aref cmp k)))
+		(setq k (1+ k))
+		)
+	      (insert ?\n)
+	      (setq i 1)
+	      (while (< i 3)
+		(insert "        ")
+		(setq k (* i 6)
+		      k+6 (+ k 6))
+		(while (< k k+6)
+		  (insert (bitmap-compose (aref cmp k)))
+		  (setq k (1+ k))
+		  )
+		(insert ?\n)
+		(setq i (1+ i))
+		)))))))
+
+
+;;; @ end
+;;;
+
+(provide 'bitmap)
+
+;;; bitmap.el ends here