Imagick::setOption()

(PECL imagick 2.0.0)

Set an option

说明

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。

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);
        }
    }
?>

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

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.