1 | #!/usr/bin/perl |
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2 | use warnings; |
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3 | use strict; |
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4 | |
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5 | my %bitno = (0 => 0); |
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6 | for (0 .. 31) { |
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7 | $bitno{1 << $_} = $_; |
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8 | } |
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9 | |
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10 | my $last_ch = -1; |
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11 | open U, '<', 'unifont.hex' or |
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12 | open U, '<', '/usr/share/unifont/unifont.hex' or die $!; |
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13 | open O, '>', 'unifont.pixelfont' or die $!; |
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14 | while (<U>) { |
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15 | my ($ch, $hex) = /^([[:xdigit:]]+):([[:xdigit:]]+)$/; |
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16 | if (!defined $ch) { |
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17 | print "Bad line: $_"; |
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18 | next; |
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19 | } |
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20 | $ch = hex($ch); |
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21 | if ($ch == 256) { |
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22 | close O; |
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23 | open O, '<', 'unifont.pixelfont' or die $!; |
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24 | open P, '>', 'preload_font.h' or die $!; |
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25 | print P "static const unsigned char fontdata_preloaded[] = {"; |
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26 | my $c = 0; |
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27 | while (<O>) { |
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28 | for (split //, $_) { |
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29 | if ($c++ % 8 == 0) { |
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30 | print P "\n "; |
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31 | } |
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32 | printf P "% 4d,", ord $_; |
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33 | } |
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34 | } |
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35 | print P "\n};\n"; |
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36 | close P; |
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37 | close O; |
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38 | open O, '>', 'unifont.pixelfont' or die $!; |
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39 | } |
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40 | |
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41 | while (++$last_ch < $ch) { |
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42 | # print "Missing entry for ".($last_ch - 1 )."\n"; |
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43 | print O pack 'C', 0x00; |
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44 | } |
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45 | |
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46 | # $len is 0, 2 or 4 |
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47 | my $len = length($hex) / 16; |
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48 | my $packcode; |
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49 | if ($len == 4) { |
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50 | $packcode = 'n'; |
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51 | } elsif ($len == 2) { |
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52 | $packcode = 'C'; |
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53 | } elsif ($len == 0) { |
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54 | $packcode = ''; |
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55 | } else { |
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56 | die "No handling for len = $len\n"; |
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57 | } |
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58 | my $data = ''; |
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59 | my $start; |
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60 | my $n = 0; |
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61 | my $pixels_set = 0; |
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62 | my $width = $len * 4; |
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63 | if ($len) { |
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64 | my @data = (); |
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65 | for (0 .. 15) { |
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66 | my $c = substr($hex, (15 - $_) * $len, $len); |
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67 | my $row = hex($c); |
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68 | $pixels_set |= $row; |
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69 | if (!defined $start) { |
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70 | # Skip blank rows at the bottom. |
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71 | next unless $row; |
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72 | $start = $_; |
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73 | } |
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74 | $n = $_ if $row; |
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75 | push @data, $row; |
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76 | |
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77 | # my $b = sprintf $fmt, $row; |
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78 | # $b =~ y/01/ @/; |
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79 | # print "\t$b\n"; |
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80 | } |
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81 | |
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82 | my $left_gap = 0; |
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83 | my $lsb_used = $pixels_set & -$pixels_set; |
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84 | my $msb_used = 1 << ($len * 4 - 1); |
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85 | while ($msb_used > $pixels_set) { |
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86 | $msb_used >>= 1; |
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87 | ++$left_gap; |
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88 | } |
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89 | $data = join '', map {pack($packcode, $_ << $left_gap)} @data; |
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90 | my $right_gap = $bitno{$lsb_used} + $left_gap; |
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91 | $right_gap = 0 if ($left_gap == 16); |
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92 | $width -= $right_gap; |
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93 | } else { |
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94 | $width -= 2; |
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95 | } |
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96 | |
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97 | if (!defined $start) { |
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98 | # No set pixels. |
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99 | print O pack 'C', ($len * 4 - 4); |
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100 | die "not really empty!" unless $hex =~ /^0*$/; |
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101 | } else { |
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102 | die "really empty!" if $hex =~ /^0*$/; |
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103 | $n = $n + 1 - $start; |
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104 | print O pack 'C', (($len / 2) << 6) | $width; |
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105 | print O pack 'C', ($start << 4) | ($n - 1); |
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106 | die "too little data (".length($data)." < ".$n."*".($len/2).")" if length($data) < $n * $len/2; |
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107 | print O substr($data, 0, $n * $len / 2); |
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108 | } |
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109 | } |
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110 | close O or die $!; |
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