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#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
# Copyright 1999-2005 Alfred Reibenschuh <areibens@cpan.org>.
#
#=======================================================================
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# $Id: Separation.pm,v 1.8 2005/03/14 22:01:27 fredo Exp $
#
#=======================================================================
package PDF::API2::Resource::ColorSpace::Separation;
BEGIN {
use strict;
use vars qw(@ISA $VERSION);
use PDF::API2::Resource::ColorSpace;
use PDF::API2::Basic::PDF::Utils;
use PDF::API2::Util;
use Math::Trig;
@ISA = qw( PDF::API2::Resource::ColorSpace );
( $VERSION ) = '$Revision: 1.8 $' =~ /Revision: (\S+)\s/; # $Date: 2005/03/14 22:01:27 $
}
no warnings qw[ deprecated recursion uninitialized ];
=item $cs = PDF::API2::Resource::ColorSpace::Separation->new $pdf, $key, %parameters
Returns a new colorspace object.
=cut
sub new {
my ($class,$pdf,$key,@opts)=@_;
my ($name,@clr)=@opts;
$class = ref $class if ref $class;
$self=$class->SUPER::new($pdf,$key,@opts);
$pdf->new_obj($self) unless($self->is_obj($pdf));
$self->{' apipdf'}=$pdf;
my $fct=PDFDict();
my $csname='DeviceRGB';
$clr[0]=lc($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]);
$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);
$fct->{' stream'}="\x00\x00\x00\x00\xff\xff\xff\xff";
} elsif(scalar @clr == 1) {
# grey color spec.
while($clr[0]>1) { $clr[0]/=255; }
# 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;
$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 $cs = PDF::API2::Resource::ColorSpace::Separation->new_api $api, $name
Returns a separation color-space object. This method is different from 'new' that
it needs an PDF::API2-object rather than a Text::PDF::File-object.
=cut
sub new_api {
my ($class,$api,@opts)=@_;
my $obj=$class->new($api->{pdf},pdfkey(),@opts);
$self->{' api'}=$api;
return($obj);
}
=item @color = $res->color
Returns the base-color of the Separation-Colorspace.
=cut
sub color {
my $self=shift @_;
if(scalar @_ >0 && defined($_[0])) {
$self->{' color'}=[@_];
}
return(@{$self->{' color'}});
}
=item $tintname = $res->tintname $tintname
Returns the tint-name of the Separation-Colorspace.
=cut
sub tintname {
my $self=shift @_;
if(scalar @_ >0 && defined($_[0])) {
$self->{' tintname'}=[@_];
}
return(@{$self->{' tintname'}});
}
sub param {
my $self=shift @_;
return($_[0]);
}
1;
__END__
=head1 HISTORY
$Log: Separation.pm,v $
Revision 1.8 2005/03/14 22:01:27 fredo
upd 2005
Revision 1.7 2004/12/16 00:30:53 fredo
added no warn for recursion
Revision 1.6 2004/07/20 20:28:45 fredo
added tintname accessor
Revision 1.5 2004/07/15 14:14:16 fredo
added type and color accessor
Revision 1.4 2004/06/15 09:14:52 fredo
removed cr+lf
Revision 1.3 2004/06/07 19:44:43 fredo
cleaned out cr+lf for lf
Revision 1.2 2004/04/07 10:50:43 fredo
fixed RGB semantics to match CMYK `tint behaviour
Revision 1.1 2004/04/06 20:57:27 fredo
separation colorspace promoted to full object
=cut
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