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PMPERRY / PDF-Builder-3.026 / lib / PDF / Builder / Resource / ColorSpace / Separation.pm 

            

              
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package PDF::Builder::Resource::ColorSpace::Separation;
use base 'PDF::Builder::Resource::ColorSpace';
use strict;
use warnings;
our $VERSION = '3.026'; # VERSION
our $LAST_UPDATE = '3.026'; # 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
=head2 new
    $cs = PDF::Builder::Resource::ColorSpace::Separation->new($pdf, $key, @colors)
=over
Returns a new colorspace object.
=back
=cut
sub new {
    my ($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;
}
=head2 color
    @color = $res->color()
=over
Returns the base-color of the Separation-Colorspace.
=back
=cut
sub color {
    my $self = shift;
    if (@_ && defined $_[0]) {
        $self->{' color'} = [@_];
    }
    return @{$self->{' color'}};
}
=head2 tintname
    $tintname = $res->tintname($tintname)
=over
Returns the tint-name of the Separation-Colorspace.
=back
=cut
sub tintname {
    my $self = shift;
    if (@_ && defined $_[0]) {
        $self->{' tintname'} = [@_];
    }
    return @{$self->{' tintname'}};
}
sub param {
    my $self = shift;
    return $_[0];
}
1;