#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# 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: Indexed.pm,v 2.0 2005/11/16 02:18:14 areibens Exp $
#
#=======================================================================
package PDF::API2::Resource::ColorSpace::Indexed;
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 );
( $VERSION ) = sprintf '%i.%03i', split(/\./,('$Revision: 2.0 $' =~ /Revision: (\S+)\s/)[0]); # $Date: 2005/11/16 02:18:14 $
}
no warnings qw[ deprecated recursion uninitialized ];
=item $cs = PDF::API2::Resource::ColorSpace::Indexed->new $pdf, $key, %parameters
Returns a new colorspace object.
=cut
sub new {
my ($class,$pdf,$key,%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;
$self->add_elements(PDFName('Indexed'));
$self->type('Indexed');
return($self);
}
=item $cs = PDF::API2::Resource::ColorSpace::Indexed->new_api $api, $name
Returns a indexed color-space object. This method is different from 'new' that
it needs an PDF::API2-object rather than a Text::PDF::File-object.
=cut
sub new_api {
my ($class,$api,@opts)=@_;
my $obj=$class->new($api->{pdf},@opts);
$self->{' api'}=$api;
return($obj);
}
sub enumColors {
my $self=shift @_;
my %col=();
foreach my $n (0..255) {
my $k='#'.uc(unpack('H*',substr($self->{' csd'}->{' stream'},$n*3,3)));
$col{$k}=$n unless(defined $col{$k});
}
return(%col);
}
sub nameColor {
my $self=shift @_;
my $n=shift @_;
my %col=();
my $k='#'.uc(unpack('H*',substr($self->{' csd'}->{' stream'},$n*3,3)));
return($k);
}
sub resolveNearestRGB {
my $self=shift @_;
my ($r,$g,$b)=@_; # need to be in 0-255
my $c=0;
my $w=768**2;
foreach my $n (0..255) {
my @e=unpack('C*',substr($self->{' csd'}->{' stream'},$n*3,3));
my $d=($e[0]-$r)**2 + ($e[1]-$g)**2 + ($e[2]-$b)**2;
if($d<$w) { $c=$n; $w=$d; }
}
return($c);
}
1;
__END__
=head1 HISTORY
$Log: Indexed.pm,v $
Revision 2.0 2005/11/16 02:18:14 areibens
revision workaround for SF cvs import not to screw up CPAN
Revision 1.2 2005/11/16 01:27:50 areibens
genesis2
Revision 1.1 2005/11/16 01:19:27 areibens
genesis
Revision 1.10 2005/06/17 19:44:03 fredo
fixed CPAN modulefile versioning (again)
Revision 1.9 2005/06/17 18:53:34 fredo
fixed CPAN modulefile versioning (dislikes cvs)
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 2004/07/15 14:13:46 fredo
added type accessor
Revision 1.5 2004/06/15 09:14:52 fredo
removed cr+lf
Revision 1.4 2004/06/07 19:44:43 fredo
cleaned out cr+lf for lf
Revision 1.3 2003/12/08 13:06:01 Administrator
corrected to proper licencing statement
Revision 1.2 2003/11/30 17:32:48 Administrator
merged into default
Revision 1.1.1.1.2.2 2003/11/30 16:57:02 Administrator
merged into default
Revision 1.1.1.1.2.1 2003/11/30 14:29:03 Administrator
added CVS id/log
=cut
} elsif($opts{-type} eq 'Indexed') {
$opts{-base}||='DeviceRGB';
$opts{-whitepoint}||=[ 0.95049, 1, 1.08897 ];
$opts{-blackpoint}||=[ 0, 0, 0 ];
$opts{-gamma}||=[ 2.22218, 2.22218, 2.22218 ];
# my $csd=PDFDict();
# $csd->{WhitePoint}=PDFArray(map {PDFNum($_)} @{$opts{-whitepoint}});
# $csd->{BlackPoint}=PDFArray(map {PDFNum($_)} @{$opts{-blackpoint}});
# $csd->{Gamma}=PDFArray(map {PDFNum($_)} @{$opts{-gamma}});
my $csd=PDFDict();
$pdf->new_obj($csd);
$csd->{Filter}=PDFArray(PDFName('FlateDecode'));
$self->{' index'}=[];
if(defined $opts{-actfile}) {
} elsif(defined $opts{-acofile}) {
} elsif(defined $opts{-colors}) {
$opts{-maxindex}||=scalar(@{$opts{-colors}})-1;
foreach my $col (@{$opts{-colors}}) {
map { $csd->{' stream'}.=pack('C',$_); } @{$col};
}
foreach my $col (0..$opts{-maxindex}) {
if($opts{-base}=~/RGB/i) {
my $r=(shift(@{$opts{-colors}})||0)/255;
my $g=(shift(@{$opts{-colors}})||0)/255;
my $b=(shift(@{$opts{-colors}})||0)/255;
push(@{$self->{' index'}},[$r,$g,$b]);
} elsif($opts{-base}=~/CMYK/i) {
my $c=(shift(@{$opts{-colors}})||0)/255;
my $m=(shift(@{$opts{-colors}})||0)/255;
my $y=(shift(@{$opts{-colors}})||0)/255;
my $k=(shift(@{$opts{-colors}})||0)/255;
push(@{$self->{' index'}},[$c,$m,$y,$k]);
}
}
} else {
die "unspecified color index table.";
}
$self->add_elements(PDFName('Indexed'),PDFName($opts{-base}),PDFNum($opts{-maxindex}),$csd);
$self->{' type'}='index-'.(
$opts{-base}=~/RGB/i ? 'rgb' :
$opts{-base}=~/CMYK/i ? 'cmyk' : 'unknown'
);