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package PDF::Builder::Resource::ColorSpace::Separation;
use base 'PDF::Builder::Resource::ColorSpace';
use strict;
use warnings;
our $VERSION = '3.025'; # VERSION
our $LAST_UPDATE = '3.024'; # manually update whenever code is changed
use PDF::Builder::Basic::PDF::Utils;
use PDF::Builder::Util;
use Scalar::Util qw(weaken);
=head1 NAME
PDF::Builder::Resource::ColorSpace::Separation - Support for color space separations
=head1 METHODS
=over
=item $cs = PDF::Builder::Resource::ColorSpace::Separation->new($pdf, $key, @colors)
Returns a new colorspace object.
=cut
sub new {
my ($class, $pdf, $key, $name, @clr) = @_;
$class = ref($class) if ref($class);
my $self = $class->SUPER::new($pdf, $key);
$pdf->new_obj($self) unless $self->is_obj($pdf);
$self->{' apipdf'} = $pdf;
weaken $self->{' apipdf'};
my $fct = PDFDict();
my $csname;
$clr[0] = lc($clr[0]);
$self->color(@clr);
if ($clr[0] =~ /^[a-z\#\!]+/) {
# colorname or #! specifier
# with rgb target colorspace
# namecolor returns always a RGB
my ($r,$g,$b) = namecolor($clr[0]);
$csname = 'DeviceRGB';
$fct->{'FunctionType'} = PDFNum(0);
$fct->{'Size'} = PDFArray(PDFNum(2));
$fct->{'Range'} = PDFArray(map {PDFNum($_)} ($r,1, $g,1, $b,1));
$fct->{'Domain'} = PDFArray(PDFNum(0), PDFNum(1));
$fct->{'BitsPerSample'} = PDFNum(8);
$fct->{' stream'} = "\xff\xff\xff\x00\x00\x00";
} elsif ($clr[0] =~ /^[\%]+/) {
# % specifier
# with cmyk target colorspace
my ($c,$m,$y,$k) = namecolor_cmyk($clr[0]);
$csname = 'DeviceCMYK';
$fct->{'FunctionType'} = PDFNum(0);
$fct->{'Size'} = PDFArray(PDFNum(2));
$fct->{'Range'} = PDFArray(map {PDFNum($_)} (0,$c, 0,$m, 0,$y, 0,$k));
$fct->{'Domain'} = PDFArray(PDFNum(0), PDFNum(1));
$fct->{'BitsPerSample'} = PDFNum(8);
$fct->{' stream'}="\x00\x00\x00\x00\xff\xff\xff\xff";
} elsif (scalar @clr == 1) {
# grey color spec.
$clr[0] /= 255 while $clr[0] > 1;
# adjusted for 8/16/32bit spec.
my $g = $clr[0];
$csname = 'DeviceGray';
$fct->{'FunctionType'} = PDFNum(0);
$fct->{'Size'} = PDFArray(PDFNum(2));
$fct->{'Range'} = PDFArray(map {PDFNum($_)} (0,$g));
$fct->{'Domain'} = PDFArray(PDFNum(0),PDFNum(1));
$fct->{'BitsPerSample'} = PDFNum(8);
$fct->{' stream'} = "\xff\x00";
} elsif (scalar @clr == 3) {
# legacy rgb color-spec (0 <= x <= 1)
my ($r,$g,$b) = @clr;
$csname = 'DeviceRGB';
$fct->{'FunctionType'} = PDFNum(0);
$fct->{'Size'} = PDFArray(PDFNum(2));
$fct->{'Range'} = PDFArray(map {PDFNum($_)} ($r,1, $g,1, $b,1));
$fct->{'Domain'} = PDFArray(PDFNum(0), PDFNum(1));
$fct->{'BitsPerSample'} = PDFNum(8);
$fct->{' stream'}="\xff\xff\xff\x00\x00\x00";
} elsif (scalar @clr == 4) {
# legacy cmyk color-spec (0 <= x <= 1)
my ($c,$m,$y,$k) = @clr;
$csname = 'DeviceCMYK';
$fct->{'FunctionType'} = PDFNum(0);
$fct->{'Size'} = PDFArray(PDFNum(2));
$fct->{'Range'} = PDFArray(map {PDFNum($_)} (0,$c, 0,$m, 0,$y, 0,$k));
$fct->{'Domain'} = PDFArray(PDFNum(0), PDFNum(1));
$fct->{'BitsPerSample'} = PDFNum(8);
$fct->{' stream'}="\x00\x00\x00\x00\xff\xff\xff\xff";
} else {
die 'invalid color specification.';
}
$self->type($csname);
$pdf->new_obj($fct);
$self->add_elements(PDFName('Separation'),
PDFName($name),
PDFName($csname),
$fct);
$self->tintname($name);
return $self;
}
=item @color = $res->color()
Returns the base-color of the Separation-Colorspace.
=cut
sub color {
my $self = shift;
if (@_ && defined $_[0]) {
$self->{' color'} = [@_];
}
return @{$self->{' color'}};
}
=item $tintname = $res->tintname($tintname)
Returns the tint-name of the Separation-Colorspace.
=cut
sub tintname {
my $self = shift;
if (@_ && defined $_[0]) {
$self->{' tintname'} = [@_];
}
return @{$self->{' tintname'}};
}
sub param {
my $self = shift;
return $_[0];
}
=back
=cut
1;
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