package GFX::Enhancer::ImageRepresentation;
### a repr of an image so that is manipulatable 
sub new {
        my ($class) = @_;
        my $self = { points => (), }; ### points are byte indexes in rect img
                                        ### they have colour other than white
        $class = ref($class) || $class;
        bless $self, $class;
}
### public methods
sub scan_in_points_of_png_image_file {
        my ($self, $filename) = @_;
        my $reader = GFX::Enhancer::PNGReader->new;
        $reader->read_in_byte_array($filename);
         
        for (my $i = 0; $i < $reader->{length}; $i+4) {
                my $rgba = GFX::Enhancer::PNGRGBA->new($reader->get_byte_interval($i, $i+4));
                if (($rgba->red | $rgba->green | $rgba->blue) > 0) {
                        push($self->{points}, $i);
                }
        }  
                  
}       
         
### private methods
sub scan_in_image {
        my ($self, 
}
1;