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package SVG::Barcode; |
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68805
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use strict; |
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use warnings; |
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use utf8; |
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use v5.24; |
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use feature 'signatures'; |
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120
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no warnings 'experimental::signatures'; |
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use Carp 'croak'; |
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556
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use POSIX 'fmax'; |
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6387
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1875
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use Sub::Util 'set_subname'; |
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316
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96
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our $VERSION = '0.12'; |
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633
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use constant DEFAULTS => { |
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background => 'white', |
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class => '', |
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foreground => 'black', |
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height => '', |
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id => '', |
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margin => 2, |
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scale => '', |
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width => '', |
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}; |
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_param(__PACKAGE__, $_, DEFAULTS->{$_}) for keys DEFAULTS->%*; |
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28
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# constructor |
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30
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4
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1
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2638
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sub new ($class, %params) { |
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31
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45
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my $self = bless {DEFAULTS->%*, $class->DEFAULTS->%*}, $class; |
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4
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$self->$_($params{$_}) for keys %params; |
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35
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3
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28
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return $self; |
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} |
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38
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# methods |
39
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40
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3
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3
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1
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564
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sub plot ($self, $text) { |
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2
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2
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4
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41
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2
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8
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$self->{elements} = [qq| |]; |
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2
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7
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$self->{vbwidth} = $self->{vbheight} = 0; |
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44
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2
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9
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$self->_plot($text); |
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46
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1
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3
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$self->{vbheight} += $self->{margin}; |
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1
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2
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$self->{vbwidth} += $self->{margin}; |
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1
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5
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my @attr = (qq|viewBox="0 0 $self->{vbwidth} $self->{vbheight}"|); |
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50
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1
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2
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my $scale; |
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1
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50
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33
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11
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if ($self->{scale} and $scale = $self->{scale} * 1) { |
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1
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8
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$self->{$_} = $self->{"vb$_"} * $scale for qw|height width|; |
53
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} |
54
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55
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1
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4
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for my $name (qw|id class width height|) { |
56
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4
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100
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20
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my $value = $self->$name or next; |
57
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2
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13
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push @attr, qq|$name="$value"|; |
58
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} |
59
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1
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7
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my $attributes = join ' ', sort @attr; |
60
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61
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my $svg |
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= qq| |
63
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. join("\n", $self->{elements}->@*) |
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1
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7
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. qq|\n|; |
65
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66
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1
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50
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4
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$self->{height} = $self->{width} = '' if $scale; |
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68
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1
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11
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return $svg; |
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} |
70
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71
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# internal methods |
72
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73
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8
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8
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12
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sub _param ($class, $name, $default) { |
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74
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1
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1
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8
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no strict 'refs'; ## no critic 'ProhibitNoStrict' |
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2
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1
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45
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75
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1
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1
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6
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no warnings 'redefine'; |
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1
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1
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1223
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76
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8
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28
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1
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39
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*{"${class}::$name"} = set_subname $name, sub ($self, $newvalue = undef) { |
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1
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11727
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77
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28
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100
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63
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if (defined $newvalue) { |
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6
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100
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18
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$self->{$name} = $newvalue eq '' ? $default : $newvalue; |
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6
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11
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delete $self->{plotter}; |
80
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6
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18
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return $self; |
81
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} else { |
82
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22
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104
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return $self->{$name}; |
83
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} |
84
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8
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51
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}; |
85
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} |
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87
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1
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1
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3
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sub _plot (@) { |
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1
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1
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88
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1
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192
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croak 'Method _plot not implemented by subclass!'; |
89
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} |
90
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91
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0
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0
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0
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sub _plot_1d ($self, $code, $sign) { |
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0
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0
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92
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0
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0
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my @line; |
93
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0
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0
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my $width = $self->{linewidth}; |
94
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0
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0
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my $height = $self->{lineheight}; |
95
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my $add_line = sub { |
96
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0
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0
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0
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0
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if (@line) { |
97
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0
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0
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$self->_rect(@line); |
98
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0
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0
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@line = (); |
99
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} |
100
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0
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0
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}; |
101
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102
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0
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0
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for my $x (0 .. $#$code) { |
103
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0
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0
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0
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if ($code->[$x] eq $sign) { |
104
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0
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0
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0
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if (@line) { |
105
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0
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0
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$line[2] += $width; |
106
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} else { |
107
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0
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0
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@line = ($x * $width, 0, $width, $height); |
108
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} |
109
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} else { |
110
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0
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0
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$add_line->(); |
111
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} |
112
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} |
113
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0
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0
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$add_line->(); |
114
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} |
115
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116
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0
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0
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0
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sub _plot_2d ($self, $code, $sign) { |
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0
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0
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0
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0
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0
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0
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0
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117
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0
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0
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my $x_max = $code->[0]->@* - 1; |
118
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0
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0
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my $y_max = $code->@* - 1; |
119
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120
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0
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0
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my @dot; |
121
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0
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0
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my $dotsize = $self->{dotsize}; |
122
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my $add_dot = sub { |
123
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0
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0
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0
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0
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if (@dot) { |
124
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0
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0
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$self->_rect(@dot); |
125
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0
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0
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@dot = (); |
126
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} |
127
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0
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0
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}; |
128
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129
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0
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0
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for my $y (0 .. $y_max) { |
130
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0
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0
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for my $x (0 .. $x_max) { |
131
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0
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0
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0
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if ($code->[$y][$x] eq $sign) { |
132
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0
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0
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0
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if (@dot) { |
133
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0
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0
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$dot[2] += $dotsize; |
134
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} else { |
135
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0
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0
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@dot = ($x * $dotsize, $y * $dotsize, $dotsize, $dotsize); |
136
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} |
137
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} else { |
138
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0
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0
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$add_dot->(); |
139
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} |
140
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} |
141
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0
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0
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$add_dot->(); |
142
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} |
143
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} |
144
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145
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0
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0
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0
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sub _plot_text ($self, $text) { |
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0
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146
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0
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0
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0
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if (my $size = $self->{textsize}) { |
147
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0
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0
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$self->_text($text, 0, $self->{lineheight} + $size, $size); |
148
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} |
149
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} |
150
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151
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4
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4
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23
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sub _rect ($self, $x, $y, $width, $height, $color = $self->{foreground}) { |
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5
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5
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152
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4
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8
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my $x1 = $x + $self->{margin}; |
153
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4
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5
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my $y1 = $y + $self->{margin}; |
154
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4
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14
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$self->{vbwidth} = fmax $self->{vbwidth}, $x1 + $width; |
155
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4
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10
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$self->{vbheight} = fmax $self->{vbheight}, $y1 + $height; |
156
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157
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push $self->{elements}->@*, |
158
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4
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17
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qq| |; |
159
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160
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4
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8
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return $self; |
161
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} |
162
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163
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1
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1
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5
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sub _text ($self, $text, $x, $y, $size, $color = $self->{foreground}) { |
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2
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1
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1
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my $escaped = $self->_xml_escape($text); |
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my $x1 = $x + $self->{margin}; |
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my $y1 = $y + $self->{margin}; |
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$self->{vbheight} = fmax $self->{vbheight}, $y1; |
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push $self->{elements}->@*, |
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qq| $escaped|; |
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} |
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# from Mojo::Util |
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my %XML = ( |
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'&' => '&', |
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'<' => '<', |
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'>' => '>', |
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'"' => '"', |
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'\'' => ''' |
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); |
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sub _xml_escape ($self, $str) { |
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$str =~ s/([&<>"'])/$XML{$1}/ge; |
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return $str; |
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} |
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1; |
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=encoding utf8 |
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=head1 NAME |
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SVG::Barcode - Base class for SVG 1D and 2D codes |
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=head1 SYNOPSIS |
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use SVG::Barcode::Subclass; |
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my $plotter = SVG::Barcode::Subclass->new; |
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my $svg = $plotter->plot($text); |
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$plotter->foreground; # black |
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$plotter->background; # white |
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$plotter->margin; # 2 |
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$plotter->id; |
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$plotter->class; |
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$plotter->width; |
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$plotter->height; |
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$plotter->scale; |
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%params = ( |
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foreground => 'red', |
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id => 'barcode', |
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); |
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$plotter = SVG::Barcode::Subclass->new(%params); |
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=head1 DESCRIPTION |
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L is a base class for SVG 1D and 2D codes. |
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You will not use it directly, it will be loaded by its subclasses: |
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=over |
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=item * L |
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=item * L |
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=item * L |
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=back |
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=head1 CONSTRUCTOR |
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=head2 new |
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239
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$plotter = SVG::Barcode::Subclass->new; # create with defaults |
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$plotter = SVG::Barcode::Subclass->new(%params); |
241
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242
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=head1 METHODS |
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244
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=head2 plot |
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246
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$svg = $plotter->plot($text); |
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248
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Creates a barcode. |
249
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250
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=head1 PARAMETERS |
251
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252
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=head2 background |
253
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254
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$value = $plotter->background; |
255
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$plotter = $plotter->background($newvalue); |
256
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$plotter = $plotter->background(''); # white |
257
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258
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Getter and setter for the background color. Default C. |
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260
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=head2 class |
261
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262
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$value = $plotter->class; |
263
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$plotter = $plotter->class($newvalue); |
264
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$plotter = $plotter->class(''); # '' |
265
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266
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Getter and setter for the class of the svg element. Default C<''>. |
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268
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=head2 foreground |
269
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270
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$value = $plotter->foreground; |
271
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$plotter = $plotter->foreground($newvalue); |
272
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$plotter = $plotter->foreground(''); # black |
273
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274
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Getter and setter for the foreground color. Default C. |
275
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276
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=head2 height |
277
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278
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$value = $plotter->height; |
279
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$plotter = $plotter->height($newvalue); |
280
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$plotter = $plotter->height(''); # '' |
281
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282
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Getter and setter for the height of the svg element. Default C<''>. |
283
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284
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=head2 id |
285
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286
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$value = $plotter->id; |
287
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$plotter = $plotter->id($newvalue); |
288
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$plotter = $plotter->id(''); # '' |
289
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290
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Getter and setter for the id of the svg element. Default C<''>. |
291
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292
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|
=head2 margin |
293
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294
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$value = $plotter->margin; |
295
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$plotter = $plotter->margin($newvalue); |
296
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$plotter = $plotter->margin(''); # 2 |
297
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298
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Getter and setter for the margin around the barcode. Default C<2>. |
299
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300
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=head2 scale |
301
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302
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$value = $plotter->scale; |
303
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$plotter = $plotter->scale($newvalue); |
304
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$plotter = $plotter->scale(''); # '' |
305
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306
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Getter and setter for the scale of the svg element. Sets L and L to products of |
307
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the width and height of the graphics. Used to display small barcodes without blur. Default C<''>. |
308
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309
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=head2 width |
310
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311
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$value = $plotter->width; |
312
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$plotter = $plotter->width($newvalue); |
313
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$plotter = $plotter->width(''); # '' |
314
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315
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Getter and setter for the width of the svg element. Default C<''>. |
316
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317
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|
=head1 AUTHOR & COPYRIGHT |
318
|
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319
|
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© 2019–2020 by Tekki (Rolf Stöckli). |
320
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321
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|
This program is free software, you can redistribute it and/or modify it under the terms of the |
322
|
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|
Artistic License version 2.0. |
323
|
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324
|
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|
=head1 SEE ALSO |
325
|
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326
|
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|
L, L, L. |
327
|
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328
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=cut |