Imagick::setSize

(PECL imagick 2, PECL imagick 3)

Imagick::setSize — Sets the size of the Imagick object

说明

public Imagick::setSize(int $columns, int $rows): bool

Sets the size of the Imagick object. Set it before you read a raw image format such as RGB, GRAY, or CMYK.

参数

columns
rows

返回值

成功时返回 true。

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User Contributed Notes 2 notes

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Mike Pratt ¶

9 years ago


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).

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Ade ¶

5 years ago


This function is not working for me at all.
I am trying to generate Images from a PDF and this function does literally NOTHING, even it returns 'true'.....

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