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Imagick::scaleImage

(PECL imagick 2, PECL imagick 3)

Imagick::scaleImage — Scales the size of an image

说明

public function Imagick::scaleImage(
    int $columns,
    int $rows,
    bool $bestfit = false,
    bool $legacy = false
): bool

Scales the size of an image to the given dimensions. The other parameter will be calculated if 0 is passed as either param.

注意:

参数 bestfit 的特性在 Imagick 3.0.0 中已改变。在此版本以前，当目标尺寸设为 400x400 时，原尺寸为 200x150 的图像将不会被改变。自 Imagick 3.0.0 起，源图像将会被放大到 400x300 因为这将更好的适合目标尺寸。当使用参数 bestfit 时，必须同时给出宽度和高度。

参数

columns

The number of columns in the scaled image.

rows

The number of rows in the scaled image.

bestfit

Whether to fit the image within the given dimensions while preserving the aspect ratio.

legacy

Optional bool parameter. If set to true, the calculations are done with the small rounding bug that existed in Imagick before 3.4.0. If set to false, the calculations should produce the same results as the ImageMagick command-line tools.

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

更新日志

版本 说明
PECL imagick 2.1.0 Added optional fit parameter. This method now supports proportional scaling. Pass zero as either parameter for proportional scaling.
PECL imagick 3.4.0 Added the legacy parameter.

示例

示例 #1 Imagick::scaleImage()

<?php
function scaleImage($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->scaleImage(150, 150, true);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>