package PDF::Builder::Resource::ColorSpace::Indexed::ACTFile;

use base 'PDF::Builder::Resource::ColorSpace::Indexed';

use strict;
use warnings;

our $VERSION = '3.028'; # VERSION
our $LAST_UPDATE = '3.027'; # 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::Indexed::ACTFile - Adobe Color Table support

Inherits from L<PDF::Builder::Resource::ColorSpace::Indexed>

=head1 METHODS

=head2 new

    $cs = PDF::Builder::Resource::ColorSpace::Indexed::ACTFile->new($pdf, $actfile)

=over

Returns a new colorspace object created from an Adobe color table file (ACT/8BCT).
See
Adobe Photoshop(R) 6.0 --
File Formats Specification Version 6.0 Release 2,
November 2000
for details.

=back

=cut

sub new {
    my ($class, $pdf, $file) = @_;

    die "could not find act-file '$file'." unless -f $file;
    $class = ref($class) if ref($class);
    my $self = $class->SUPER::new($pdf, pdfkey());
    $pdf->new_obj($self) unless $self->is_obj($pdf);
    $self->{' apipdf'} = $pdf;
    weaken $self->{' apipdf'};
    my $csd = PDFDict();
    $pdf->new_obj($csd);
    $csd->{'Filter'} = PDFArray(PDFName('FlateDecode'));
    # default values in case file is missing or bad??
   #$csd->{'WhitePoint'} = PDFArray(map {PDFNum($_)} (0.95049, 1, 1.08897));
   #$csd->{'BlackPoint'} = PDFArray(map {PDFNum($_)} (0, 0, 0));
   #$csd->{'Gamma'} = PDFArray(map {PDFNum($_)} (2.22218, 2.22218, 2.22218));

    my $fh;
    open($fh, "<", $file) or die "$!: $file";
    binmode($fh, ':raw');
    read($fh, $csd->{' stream'}, 768);
    close($fh);

    $csd->{' stream'} .= "\x00" x 768;
    $csd->{' stream'} = substr($csd->{' stream'}, 0, 768);

    $self->add_elements(PDFName('DeviceRGB'), PDFNum(255), $csd);
    $self->{' csd'} = $csd;

    return $self;
}

1;
