#!/usr/bin/perl
use Cairo;
use Gtk2 '-init';
use Glib qw(TRUE FALSE);
use Poppler;

my $path = 'file:///home/zentara/perlplay/Gtk2/cairo/z.pdf';

my $o = Poppler::Document->new_from_file($path);
# or if you want to open the pdf in perl, or use some othe source:
#  open (PDF, "<FILE.PDF");
#  read (PDF, my $data, -s "FILE.PDF");
#  close (PDF);
#  my $o = Poppler::Document->new_from_data($data, length($data));

my $page = $o->get_page( 0 );

my $dimension = $page->get_size;

warn $dimension->get_width;
warn $dimension->get_height;


my ( $width, $height ) = ( $dimension->get_width, $dimension->get_height  );
my $window = Gtk2::Window->new( 'toplevel' );

$window->signal_connect( 'delete_event' => sub { Gtk2->main_quit; } );

my $surface = Cairo::ImageSurface->create ('argb32', $width, $height);
my $cr = Cairo::Context->create ($surface);

# make a background rectangle filled white so screenshot is legible
$cr->rectangle( 0, 0, $width, $height );
$cr->set_source_rgb( 1, 1, 1 ); #white
$cr->fill;

$page->render_to_cairo( $cr );

$cr->show_page;

# make a visible widget to display the CairoSurface
my $drawable = Gtk2::DrawingArea->new;
$drawable->size( $width, $height );

$drawable->signal_connect(
     'expose_event' => \&on_expose_event,
      $surface
);

$window->add( $drawable );
$window->show_all;

# take a screenshot 
$surface->write_to_png ("$0.png");

Gtk2->main;

sub on_expose_event {

 my ( $widget, $event, $surface ) = @_;
 my $cr = Gtk2::Gdk::Cairo::Context->create( $widget->window );
 $cr->set_source_surface( $surface, 0, 0 );
 $cr->paint;
 $cr->show_page;

 return FALSE;
}

__END__