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