Imagick::setOption

(PECL imagick 2.0.0)

Imagick::setOption — Set an option

说明

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

Associates one or more options with the wand.

参数

key
value

返回值

成功时返回 TRUE。

范例

Example #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();
    }

?>

Example #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');

?>

Example #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);
        }
    }

?>

User Contributed Notes

kicha at kreker dot org 24-Sep-2015 11:48


List of options (with key => value) on official imagemagick site:

http://www.imagemagick.org/script/command-line-options.php#define

alexandre at gaigalas dot net 11-Jul-2011 11:43


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.