use PDF::API2;
my $pdf  = PDF::API2->new();
$pdf->mediabox(595,842);
my $page = $pdf->page;
my $fnt = $pdf->corefont('Helvetica',-encoding => 'latin1'); 
my $txt = $page->text;
my $gfx = $page->gfx;
my $image = $pdf->image_png('test.png');
$gfx->image( $image, 50, 500 );
$txt->textstart;
$txt->font($fnt, 20);
$txt->translate(100,600);
$txt->text("Hello World!");
$txt->textend;
$pdf->saveas('test.pdf');
$pdf->end();