protected static function _getStrokeX($fontSize, $angle, $fontFile, $letters, $charKey, $strokeSpacing, $textX)
{
$charSize = imagettfbbox($fontSize, $angle, $fontFile, $letters[$charKey - 1]);
$textX += abs($charSize[4] - $charSize[0]) + $strokeSpacing;
return $textX;
}