/**
* Verifies that the font file actually contains TrueType outlines.
*
* @throws \ZendPdf\Exception\ExceptionInterface
*/
public function screen()
{
if ($this->_isScreened) {
return;
}
parent::screen();
switch ($this->_readScalerType()) {
case 0x10000:
// version 1.0 - Windows TrueType signature
break;
case 0x74727565:
// 'true' - Macintosh TrueType signature
break;
default:
throw new Exception\UnrecognizedFontException('Not a TrueType font file');
}
$this->fontType = Pdf\Font::TYPE_TRUETYPE;
$this->_isScreened = true;
}