php imagick scaleImage 等比例缩小图片

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