File Coverage

blib/lib/PDF/API3/Compat/API2/Resource/ColorSpace/Indexed.pm

Criterion	Covered	Total	%
statement	23	57	40.3
branch	0	8	0.0
condition			n/a
subroutine	8	13	61.5
pod	2	5	40.0
total	33	83	39.7

#=======================================================================
#    ____  ____  _____              _    ____ ___   ____
#   |  _ \|  _ \|  ___|  _   _     / \  |  _ \_ _| |___ \
#   | |_) | | | | |_    (_) (_)   / _ \ | |_) | |    __) |
#   |  __/| |_| |  _|    _   _   / ___ \|  __/| |   / __/
#   |_|   |____/|_|     (_) (_) /_/   \_\_|  |___| |_____|
#
#   A Perl Module Chain to faciliate the Creation and Modification
#   of High-Quality "Portable Document Format (PDF)" Files.
#
#   Copyright 1999-2005 Alfred Reibenschuh .
#
#=======================================================================
#
#   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::API3::Compat::API2::Resource::ColorSpace::Indexed;

BEGIN {

    use strict;
    use vars qw(@ISA $VERSION);
    use PDF::API3::Compat::API2::Resource::ColorSpace;
    use PDF::API3::Compat::API2::Basic::PDF::Utils;
    use PDF::API3::Compat::API2::Util;
    use Math::Trig;

    @ISA = qw( PDF::API3::Compat::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::API3::Compat::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::API3::Compat::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::API3::Compat::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__