imagick scaleImage 等比例缩小图片

<pre>

$watermark->readImage(__DIR__ . '/../../../Public/' . self::COMMONURL . '/images/shuzi/' . $jinian . '.png');

$watermark->scaleImage(120,1000, true);

$image->compositeImage($watermark, \imagick::COMPOSITE_OVER, 385, 478);

</pre>

第二个参数设置个大点就可以额