package PDF::API2::Resource::ColorSpace::Indexed;

use base 'PDF::API2::Resource::ColorSpace';

use strict;
no warnings qw[ deprecated recursion uninitialized ];

our $VERSION = '2.041'; # VERSION

use PDF::API2::Basic::PDF::Utils;
use PDF::API2::Util;
use Scalar::Util qw(weaken);

sub new {
    my ($class,$pdf,$key,%opts)=@_;

    $class = ref $class if ref $class;
    my $self=$class->SUPER::new($pdf,$key,%opts);
    $pdf->new_obj($self) unless($self->is_obj($pdf));
    $self->{' apipdf'}=$pdf;
    weaken $self->{' apipdf'};

    $self->add_elements(PDFName('Indexed'));
    $self->type('Indexed');

    return($self);
}

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__

} 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'
);

