public function getXObjects()
{
if (!is_null($this->xobjects)) {
return $this->xobjects;
}
$resources = $this->get('Resources');
if (method_exists($resources, 'has') && $resources->has('XObject')) {
if ($resources->get('XObject') instanceof Header) {
$xobjects = $resources->get('XObject')->getElements();
} else {
$xobjects = $resources->get('XObject')->getHeader()->getElements();
}
$table = array();
foreach ($xobjects as $id => $xobject) {
$table[$id] = $xobject;
// Store too on cleaned id value (only numeric)
$id = preg_replace('/[^0-9\\.\\-_]/', '', $id);
if ($id != '') {
$table[$id] = $xobject;
}
}
return $this->xobjects = $table;
} else {
return array();
}
}