function parseParamString($str)
{
// $str contains "qlow-200px" or "200px" strings because thumb.php would strip the filename
// first - check if the string begins with "qlow-", and if so, treat it as quality.
// Pass the first portion, or the whole string if "qlow-" not found, to the parent
// The parsing must match the makeParamString() above
$res = false;
$m = false;
if (preg_match('/q([^-]+)-(.*)$/', $str, $m)) {
$v = $m[1];
if (self::validateQuality($v)) {
$res = parent::parseParamString($m[2]);
if ($res) {
$res['quality'] = $v;
}
}
} else {
$res = parent::parseParamString($str);
}
return $res;
}
