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package Graphics::Color::RGB; |
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BEGIN { |
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33357
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$Graphics::Color::RGB::VERSION = '0.29'; |
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} |
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use Moose; |
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use MooseX::Aliases; |
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extends qw(Graphics::Color); |
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# ABSTRACT: RGB color model |
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use Color::Library; |
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use Graphics::Color::HSL; |
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use Graphics::Color::HSV; |
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use Graphics::Color::Types qw(NumberOneOrLess); |
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has 'red' => ( |
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is => 'rw', |
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isa => NumberOneOrLess, |
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default => 1, |
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alias => 'r' |
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); |
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has 'green' => ( |
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is => 'rw', |
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isa => NumberOneOrLess, |
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default => 1, |
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alias => 'g' |
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); |
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has 'blue' => ( |
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is => 'rw', |
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isa => NumberOneOrLess, |
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default => 1, |
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alias => 'b' |
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); |
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has 'alpha' => ( |
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is => 'rw', |
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isa => NumberOneOrLess, |
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default => 1, |
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alias => 'a' |
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); |
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51
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has 'name' => ( is => 'rw', isa => 'Str' ); |
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53
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54
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sub as_string { |
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my ($self) = @_; |
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57
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return sprintf('%0.2f,%0.2f,%0.2f,%0.2f', |
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$self->red, $self->green, |
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$self->blue, $self->alpha |
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); |
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} |
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63
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64
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sub as_integer_string { |
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my ($self) = @_; |
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67
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return sprintf("%d, %d, %d, %0.2f", |
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$self->red * 255, $self->green * 255, $self->blue * 255, $self->alpha |
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); |
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} |
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72
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73
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sub as_css_hex { |
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my ($self) = @_; |
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76
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return $self->as_hex_string('#'); |
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} |
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79
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sub as_hex_string { |
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my ($self, $prepend) = @_; |
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83
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$prepend = '' unless defined($prepend); |
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85
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return sprintf('%s%.2x%.2x%.2x', |
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$prepend, $self->red * 255, $self->green * 255, $self->blue * 255 |
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); |
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} |
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90
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91
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sub as_percent_string { |
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my ($self) = @_; |
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94
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return sprintf("%d%%, %d%%, %d%%, %0.2f", |
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$self->red * 100, $self->green * 100, $self->blue * 100, $self->alpha |
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); |
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} |
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99
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100
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sub as_array { |
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my ($self) = @_; |
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103
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return ($self->red, $self->green, $self->blue); |
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} |
105
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106
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107
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sub as_array_with_alpha { |
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my ($self) = @_; |
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110
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return ($self->red, $self->green, $self->blue, $self->alpha); |
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} |
112
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113
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114
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sub equal_to { |
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my ($self, $other) = @_; |
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117
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return 0 unless defined($other); |
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119
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unless($self->red == $other->red) { |
120
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return 0; |
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} |
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unless($self->green == $other->green) { |
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return 0; |
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} |
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unless($self->blue == $other->blue) { |
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return 0; |
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} |
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unless($self->alpha == $other->alpha) { |
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return 0; |
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} |
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132
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return 1; |
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} |
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135
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136
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sub from_color_library { |
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my ($self, $id) = @_; |
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139
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my $color; |
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if(ref($id)) { |
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$color = $id; |
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} else { |
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$color = Color::Library->color($id); |
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unless(defined($color)) { |
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die("Couldn't find color for '$id'!"); |
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} |
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} |
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149
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my ($r, $g, $b) = $color->rgb; |
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return Graphics::Color::RGB->new( |
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red => $r / 255, |
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green => $g / 255, |
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blue => $b / 255 |
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); |
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} |
156
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157
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158
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sub from_hex_string { |
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my ($self, $hex) = @_; |
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161
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# Get rid of the leading # if it's there |
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$hex =~ s/^#//g; |
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$hex = lc($hex); |
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165
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my $len = length($hex); |
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167
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if(length($hex) == 3) { |
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$hex =~ /([a-f0-9])([a-f0-9])([a-f0-9])/; |
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$hex = "$1$1$2$2$3$3"; |
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} |
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172
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if(length($hex) == 6) { |
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$hex =~ /([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/; |
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175
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return Graphics::Color::RGB->new( |
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red => hex($1) / 255, |
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green => hex($2) / 255, |
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blue => hex($3) / 255 |
179
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); |
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} |
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182
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# Not a valid hex color |
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return undef; |
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} |
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186
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187
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sub to_hsl { |
188
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my ($self) = @_; |
189
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190
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my $max = $self->red; |
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my $maxc = 'r'; |
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my $min = $self->red; |
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194
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if($self->green > $max) { |
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$max = $self->green; |
196
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$maxc = 'g'; |
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} |
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if($self->blue > $max) { |
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$max = $self->blue; |
200
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$maxc = 'b'; |
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} |
202
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203
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if($self->green < $min) { |
204
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$min = $self->green; |
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} |
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if($self->blue < $min) { |
207
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$min = $self->blue; |
208
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} |
209
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210
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my ($h, $s, $l); |
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212
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if($max == $min) { |
213
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$h = 0; |
214
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} elsif($maxc eq 'r') { |
215
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$h = 60 * (($self->green - $self->blue) / ($max - $min)) % 360; |
216
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} elsif($maxc eq 'g') { |
217
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$h = (60 * (($self->blue - $self->red) / ($max - $min)) + 120); |
218
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} elsif($maxc eq 'b') { |
219
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$h = (60 * (($self->red - $self->green) / ($max - $min)) + 240); |
220
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} |
221
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222
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$l = ($max + $min) / 2; |
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224
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if($max == $min) { |
225
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$s = 0; |
226
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} elsif($l <= .5) { |
227
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$s = ($max - $min) / ($max + $min); |
228
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} else { |
229
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$s = ($max - $min) / (2 - ($max + $min)); |
230
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} |
231
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232
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return Graphics::Color::HSL->new( |
233
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hue => $h, saturation => $s, lightness => $l, alpha => $self->alpha |
234
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); |
235
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} |
236
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237
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238
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sub to_hsv { |
239
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my ($self) = @_; |
240
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241
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my $max = $self->red; |
242
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my $maxc = 'r'; |
243
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my $min = $self->red; |
244
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245
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if($self->green > $max) { |
246
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$max = $self->green; |
247
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$maxc = 'g'; |
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} |
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if($self->blue > $max) { |
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$max = $self->blue; |
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$maxc = 'b'; |
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} |
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if($self->green < $min) { |
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$min = $self->green; |
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} |
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if($self->blue < $min) { |
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$min = $self->blue; |
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} |
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my ($h, $s, $v); |
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if($max == $min) { |
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$h = 0; |
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} elsif($maxc eq 'r') { |
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$h = 60 * (($self->green - $self->blue) / ($max - $min)) % 360; |
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} elsif($maxc eq 'g') { |
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$h = (60 * (($self->blue - $self->red) / ($max - $min)) + 120); |
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} elsif($maxc eq 'b') { |
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$h = (60 * (($self->red - $self->green) / ($max - $min)) + 240); |
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} |
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$v = $max; |
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if($max == 0) { |
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$s = 0; |
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} else { |
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$s = 1 - ($min / $max); |
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} |
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280
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return Graphics::Color::HSV->new( |
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hue => $h, saturation => $s, value => $v, alpha => $self->alpha |
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); |
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} |
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285
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__PACKAGE__->meta->make_immutable; |
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287
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no Moose; |
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1; |
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__END__ |
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=pod |
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292
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=head1 NAME |
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294
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Graphics::Color::RGB - RGB color model |
295
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296
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=head1 VERSION |
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298
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version 0.29 |
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300
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=head1 SYNOPSIS |
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302
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use Graphics::Color::RGB; |
303
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304
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my $color = Graphics::Color::RGB->new({ |
305
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red => 1, |
306
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blue => .31, |
307
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green => .25, |
308
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}); |
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310
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=head1 DESCRIPTION |
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312
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Graphics::Color::RGB represents a Color in the sRGB color space. Individual |
313
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color channels are expressed as decimal values from 0 to 1, 0 being a lack |
314
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of that color (or opaque in the case of alpha) and 1 being full color (or |
315
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|
transparent in the case of alpha). If no options are provided then new |
316
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instance of RGB are opaque white, (that is equivalent to red => 1, green => 1, |
317
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|
blue => 1, alpha => 1). |
318
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319
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|
Convenience methods are supplied to convert to various string values. |
320
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321
|
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|
=head1 ATTRIBUTES |
322
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323
|
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|
|
=head2 red |
324
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325
|
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|
|
=head2 r |
326
|
|
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|
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|
327
|
|
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|
|
Set/Get the red component of this Color. Aliased to 'r' as well. |
328
|
|
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|
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329
|
|
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|
|
=head2 green |
330
|
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331
|
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|
|
=head2 g |
332
|
|
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|
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|
|
333
|
|
|
|
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|
|
Set/Get the green component of this Color. Aliased to 'g' as well. |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
=head2 blue |
336
|
|
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|
|
337
|
|
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|
|
=head2 b |
338
|
|
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|
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|
|
|
339
|
|
|
|
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|
|
Set/Get the blue component of this Color. Aliased to 'b' as well. |
340
|
|
|
|
|
|
|
|
341
|
|
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|
|
|
|
=head2 alpha |
342
|
|
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|
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|
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343
|
|
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|
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|
|
=head2 a |
344
|
|
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|
|
|
|
|
345
|
|
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|
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|
|
Set/Get the alpha component of this Color. Aliased to 'a' as well. |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
=head2 name |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
Get the name of this color. Only valid if the color was created by name. |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
=head1 METHODS |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
=head2 as_string |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
Get a string version of this Color in the form of RED,GREEN,BLUE,ALPHA |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
=head2 as_integer_string |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
Return an integer formatted value for this color. This format is suitable for |
360
|
|
|
|
|
|
|
CSS RGBA values. |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
=head2 as_css_hex |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
Return a hex formatted value with a prepended '#' for use in CSS and HTML. |
365
|
|
|
|
|
|
|
|
366
|
|
|
|
|
|
|
=head2 as_hex_string ( [$prepend] ) |
367
|
|
|
|
|
|
|
|
368
|
|
|
|
|
|
|
Return a hex formatted value for this color. The output ignores the alpha |
369
|
|
|
|
|
|
|
channel because, per the W3C, there is no hexadecimal notiation for an RGBA |
370
|
|
|
|
|
|
|
value. Optionally allows you to include a string that will be prepended. This |
371
|
|
|
|
|
|
|
is a common way to add the C<#>. |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
=head2 as_percent_string |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
Return a percent formatted value for this color. This format is suitable for |
376
|
|
|
|
|
|
|
CSS RGBA values. |
377
|
|
|
|
|
|
|
|
378
|
|
|
|
|
|
|
=head2 as_array |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
Get the RGB values as an array. |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
=head2 as_array_with_alpha |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
Get the RGBA values as an array |
385
|
|
|
|
|
|
|
|
386
|
|
|
|
|
|
|
=head2 equal_to |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
Compares this color to the provided one. Returns 1 if true, else 0; |
389
|
|
|
|
|
|
|
|
390
|
|
|
|
|
|
|
=head2 not_equal_to |
391
|
|
|
|
|
|
|
|
392
|
|
|
|
|
|
|
The opposite of equal_to. |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
=head2 from_color_library ($color_id) |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
Attempts to retrieve the specified color-id using L<Color::Library>. The |
397
|
|
|
|
|
|
|
result is then converted into a Graphics::Color::RGB object. |
398
|
|
|
|
|
|
|
|
399
|
|
|
|
|
|
|
=head2 from_hex_string($hex) |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
Attempts to create a Graphics::Color::RGB object from a hex string. Works with |
402
|
|
|
|
|
|
|
or without the leading # and with either 3 or 6 character hex strings. |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
=head2 to_hsl |
405
|
|
|
|
|
|
|
|
406
|
|
|
|
|
|
|
Creates this RGB color in HSL space. Returns a L<Graphics::Color::HSL> object. |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
=head2 to_hsv |
409
|
|
|
|
|
|
|
|
410
|
|
|
|
|
|
|
Creates this RGB color in HSV space. Returns a L<Graphics::Color::HSV> object. |
411
|
|
|
|
|
|
|
|
412
|
|
|
|
|
|
|
=head1 AUTHOR |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
Cory G Watson <gphat@cpan.org> |
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
417
|
|
|
|
|
|
|
|
418
|
|
|
|
|
|
|
This software is copyright (c) 2011 by Cold Hard Code, LLC. |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
This is free software; you can redistribute it and/or modify it under |
421
|
|
|
|
|
|
|
the same terms as the Perl 5 programming language system itself. |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
=cut |
424
|
|
|
|
|
|
|
|