function save($file = NULL, $quality = NULL, $type = NULL)
{
if ($this->file === NULL) {
return parent::save($file, $quality, $type);
}
$quality = $quality === NULL ? '' : '-quality ' . max(0, min(100, (int) $quality));
if ($file === NULL) {
$this->execute("convert {$quality} -strip %input %output", $type === NULL ? self::PNG : $type);
readfile($this->file);
} else {
$this->execute("convert {$quality} -strip %input %output", (string) $file);
}
return TRUE;
}
