public function render()
{
$pathThumbnail = $this->getPresentation()->getPresentationProperties()->getThumbnailPath();
if ($pathThumbnail) {
$fileThumbnail = file_get_contents($pathThumbnail);
$gdImage = imagecreatefromstring($fileThumbnail);
if ($gdImage) {
ob_start();
imagejpeg($gdImage);
$imageContents = ob_get_contents();
ob_end_clean();
imagedestroy($gdImage);
$this->getZip()->addFromString('docProps/thumbnail.jpeg', $imageContents);
}
}
// Return
return $this->getZip();
}