Imagick::setOption

(PECL imagick 2, PECL imagick 3)

Imagick::setOption — Set an option

说明

public Imagick::setOption(string $key, string $value): bool

Associates one or more options with the wand.

参数

key
value

返回值

成功时返回 true。

示例

示例 #1 Attempt to reach '$extent' sizeImagick::setOption()

<?php
    function renderJPG($extent) {
        $imagePath = $this->control->getImagePath();
        $imagick = new \Imagick(realpath($imagePath));
        $imagick->setImageFormat('jpg');
        $imagick->setOption('jpeg:extent', $extent);
        header("Content-Type: image/jpg");
        echo $imagick->getImageBlob();
    }

?>

示例 #2 Imagick::setOption()

<?php
    function renderPNG($imagePath, $format) {

        $imagick = new \Imagick(realpath($imagePath));
        $imagick->setImageFormat('png');
        $imagick->setOption('png:format', $format);
        header("Content-Type: image/png");
        echo $imagick->getImageBlob();
    }
    
    //Save as 64bit PNG.
    renderPNG($imagePath, 'png64');

?>

示例 #3 Imagick::setOption()

<?php
    function renderCustomBitDepthPNG() {
        $imagePath = $this->control->getImagePath();
        $imagick = new \Imagick(realpath($imagePath));
        $imagick->setImageFormat('png');
        
        $imagick->setOption('png:bit-depth', '16');
        $imagick->setOption('png:color-type', 6);
        header("Content-Type: image/png");
        $crash = true;
        if ($crash) {
            echo $imagick->getImageBlob();
        }
        else {
            $tempFilename = tempnam('./', 'imagick');
            $imagick->writeimage(realpath($tempFilename));
            echo file_get_contents($tempFilename);
        }
    }

?>

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＋添加备注

用户贡献的备注 4 notes

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kicha at kreker dot org ¶

9 years ago

List of options (with key => value) on official imagemagick site:
http://www.imagemagick.org/script/command-line-options.php#define

down

alexandre at gaigalas dot net ¶

13 years ago

If you want to extract a preview from a PDF file using the CropBox instead of the whole document, setOption() is the right method:

<?php
$handler = new Imagick();
$handler->setOption('pdf:use-cropbox', 'true');
$handler->readImage($imageFileName);
$handler->thumbnailImage(200, 200, true);
$handler->setImageFormat('jpeg');
$handler->writeImage($destThumbFileName);
?>

It is the equivalent to the -define pdf:use-cropbox=true for the convert command line tool. pdf:use-trimbox is also available.

Note that on my environment the setOption only worked when i called it before the readImage method, which means that you can't pass the filename to the Imagick constructor directly.

down

SkepticaLee ¶

4 years ago

Actually setImageArtifact () can be used if setOption () fails, e.g.

$im->setImageartifact ("distort:viewport", "960x540+0-151");

Or maybe setOption () is deprecated.

down

dodginess at yahoo dot com ¶

6 months ago

It does not appear to be possible to disable anti-aliasing using the setOption() method as might be expected, and calling the setOption() method like this does not do anything:

$imagick->setOption('antialias', FALSE);

As discussed at https://github.com/Imagick/imagick/issues/83 the correct way to do this appears to be to use the setAntiAlias() method, which is not currently documented in the PHP manual. As an example, to disable anti-aliasing for an image you can do this:

$imagick->setAntiAlias(FALSE);