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annotate packages/services/gfx/mw/current/src/fonts/convbdf @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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1 #! /usr/bin/perl -w
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2 #
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3 # Convert BDF files to nano-X font files
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4 # modified by G Haerr from bdftobogl for 16 bit MWIMAGEBITS
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5 # modified on 2/10/00 by K Harris to accept any size input character
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6 # modified on 3/26/00 by G Haerr added ascent field, fixed $IMAGE_BITS
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7 # originally from BOGL - Ben's Own Graphics Library <pfaffben@debian.org>.
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8 #
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9
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10 use POSIX;
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11
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12 if ($#ARGV < 0) {
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13 print "Usage: convbdf font.bdf > font.c\n";
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14 exit -1;
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15 }
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16
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17 $LAST_CHAR = 0x7e;
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18 $IMAGE_BITS = 16;
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19 $IMAGE_NIBBLES = $IMAGE_BITS/4;
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20 $IMAGE_MASK = 0xffff;
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21
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22 $file = $ARGV[0];
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23
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24 $font = $file;
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25 $font =~ s/\.bdf//;
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26 $font =~ tr/a-zA-Z0-9_/_/cs;
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27
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28 print "/* Generated by convbdf on ", substr(`date`, 0, -1), ". */\n";
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29 print "#include \"device.h\"\n\n";
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30
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31 open BDF, "<$file" || die;
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32 while (<BDF>) {
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33 chop;
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34 $pixel_size = $1 if /^PIXEL_SIZE (\d+)$/;
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35 $font_ascent = $1 if /^FONT_ASCENT (\d+)$/;
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36 $font_descent = $1 if /^FONT_DESCENT (\d+)$/;
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37 $font_name = $1 if /^FONT (.*)$/;
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38 $default_char = $1 if /^DEFAULT_CHAR (\d+)$/;
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39
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40 last if /^CHARS /;
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41 }
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42
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43 print "/* Font information:\n\n";
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44 print " name: $font_name\n";
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45 print " pixel size: $pixel_size\n";
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46 print " ascent: $font_ascent\n";
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47 print " descent: $font_descent\n";
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48 print "*/\n\n";
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49
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50 print "/* Font character bitmap data. */\n";
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51 print "static MWIMAGEBITS ${font}_bits[] = {\n";
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52
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53 $ch_height = $font_ascent + $font_descent;
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54 $ofs = 0;
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55 $maxwidth = 0;
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56 $firstchar = -1;
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57 while (<BDF>) {
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58 chop;
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59 undef $encoding, undef $width, undef $bbx, undef $bby, undef $bbw, undef $bbh if /^STARTCHAR /;
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60 $encoding = $1 if /^ENCODING (\d+)/;
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61 last if defined $encoding && $encoding > $LAST_CHAR;
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62 $width = $1 if /^DWIDTH (-?\d+)/;
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63 ($bbw, $bbh, $bbx, $bby) = ($1, $2, $3, $4) if /^BBX (-?\d+) (-?\d+) (-?\d+) (-?\d+)/;
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64
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65 if (/^BITMAP$/) {
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66 next if !defined $encoding;
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67 $firstchar = $encoding if $firstchar < 0;
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68 $encoding_tab[$encoding] = $ofs;
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69 $width -= $bbx, $bbx = 0 if $bbx < 0;
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70 $width[$encoding] = $width;
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71 $maxwidth = $width if $width > $maxwidth;
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72 $ch_words = int (($width+$IMAGE_BITS-1)/$IMAGE_BITS);
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73 $ch_bits = $ch_words*$IMAGE_BITS;
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74 for (my $i = 0; $i < $ch_height; $i++) {
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75 for (my $k = 0; $k < $ch_words; $k++) {
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76 $bm[$i][$k] = 0;
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77 }
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78 }
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79 for (my $i = 0; ; $i++) {
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80 $_ = <BDF>;
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81 chop;
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82 last if /^ENDCHAR$/;
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83
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84 @hexnibbles = split //,$_;
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85 for (my $k=0; $k<$ch_words; $k++) {
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86 $ndx = $k*$IMAGE_NIBBLES;
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87 $padnibbles = @hexnibbles - $ndx;
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88 last if $padnibbles <= 0; # if bbx pushes bits into next word
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89 # and no more bits from bdf file
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90 $padnibbles = 0 if $padnibbles >= $IMAGE_NIBBLES;
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91 $value = hex join '',@hexnibbles[$ndx..($ndx+$IMAGE_NIBBLES-1-$padnibbles)];
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92 $value = $value << ($padnibbles*$IMAGE_NIBBLES);
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93 $bm[$ch_height - $font_descent - $bby - $bbh + $i][$k] |=
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94 $value >> ($bbx);
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95 if ($bbx) { # handle overflow into next image_word
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96 $bm[$ch_height - $font_descent - $bby - $bbh + $i][$k+1] =
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97 ($value << ($IMAGE_BITS - $bbx)) & $IMAGE_MASK;
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98 }
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99 }
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100 }
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101
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102 ### printf "\n/* Character %c (0x%02x):\n", $encoding, $encoding;
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103 printf "\n/* Character (0x%02x):\n", $encoding;
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104 print " bbw=$bbw, bbh=$bbh, bbx=$bbx, bby=$bby, width=$width\n";
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105 print " +", ("-" x $ch_bits), "+\n";
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106 for (my $i = 0; $i < $ch_height; $i++) {
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107 print " |";
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108 for (my $k = 0; $k < $ch_words; $k++) {
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109 for (my $j = $IMAGE_BITS - 1; $j >= 0; $j--) {
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110 print $bm[$i][$k] & (1 << $j) ? "*" : " ";
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111 }
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112 }
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113 print "|\n";
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114 }
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115 print " +", ("-" x $ch_bits), "+ */\n";
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116
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117 for (my $i = 0; $i < $ch_height; $i++) {
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118 for ($k=0; $k<$ch_words; $k++) {
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119 $ofs++;
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120 printf "0x%04x, ", $bm[$i][$k];
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121 }
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122 printf "\n";
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123 }
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124 }
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125 }
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126
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127 print "};\n\n";
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128
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129 #print STDERR "Maximum character width=$maxwidth\n";
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130
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131 print "/* Character->glyph data. */\n";
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132 print "static unsigned short ${font}_offset[] = {\n";
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133 for (my $i = $firstchar; $i <= $LAST_CHAR; $i++) {
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134 my $char = $i;
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135 my $ofs = $encoding_tab[$i];
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136 $ofs = $encoding_tab[$default_char], $char = $default_char if !defined $ofs;
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137 ### printf " $ofs,\t/* %c (0x%02x) */\n", $char, $i;
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138 printf " $ofs,\t/* (0x%02x) */\n", $i;
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139 }
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140 print "};\n\n";
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141
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142 print "/* Character width data. */\n";
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143 print "static unsigned char ${font}_width[] = {\n";
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144 for (my $i = $firstchar; $i <= $LAST_CHAR; $i++) {
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145 my $char = $i;
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146 my $width = $width[$i];
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147 $width = $width[$default_char], $char = $default_char if !defined $encoding_tab[$i];
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148 ### printf " $width,\t/* %c (0x%02x) */\n", $char, $i;
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149 printf " $width,\t/* (0x%02x) */\n", $i;
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150 }
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151 print "};\n\n";
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152
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153 $size = $LAST_CHAR - $firstchar + 1;
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154
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155 print "/* Exported structure definition. */\n";
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156 print "MWCFONT font_${font} = {\n";
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157 print " \"$font\",\n";
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158 print " $maxwidth,\n";
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159 print " $ch_height,\n";
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160 print " $font_ascent,\n";
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161 print " $firstchar,\n";
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162 print " $size,\n";
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163 print " ${font}_bits,\n";
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164 print " ${font}_offset,\n";
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165 print " ${font}_width,\n";
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166 print "};\n";