(PECL imagick 2.0.0)
Imagick::setSize — Sets the size of the Imagick object
$columns
, int $rows
)Sets the size of the Imagick object. Set it before you read a raw image format such as RGB, GRAY, or CMYK.
columns
rows
成功时返回 TRUE。
Mike Pratt (2012-09-25 17:48:57)
Using setSize before reading an image file tells ImageMagick to resize the image immediately on load - this can give a substantial increase in performance time and save memory and disk resources for large images:
<?php
$image = new Imagick();
$image->setSize(800,600);
$image->readImage($file);
?>
This might also save you having to call thumbnailImage to resize the image.
On my server, this only made a difference with jpgs - pngs and gifs were loaded at full size which took much longer (30s or more compared to 6s for a similar sized jpg).