Imagick::fxImage

(PECL imagick 2.0.0)

Imagick::fxImage — Evaluate expression for each pixel in the image

Descrierea

Imagick::fxImage ( string $expression [, int $channel = Imagick::CHANNEL_DEFAULT ] ) : Imagick

Evaluate expression for each pixel in the image. Consult » The Fx Special Effects Image Operator for more information.

Parametri

expression: The expression.
channel: Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

Valorile întoarse

Întoarce TRUE în caz de succes.

Erori/Excepții

Emite ImagickException în caz de eroare.

Exemple

Example #1 Imagick::fxImage()


<?php
function fxImage() {
    $imagick = new \Imagick();
    $imagick->newPseudoImage(200, 200, "xc:white");

    $fx = 'xx=i-w/2; yy=j-h/2; rr=hypot(xx,yy); (.5-rr/140)*1.2+.5';
    $fxImage = $imagick->fxImage($fx);

    header("Content-Type: image/png");
    $fxImage->setimageformat('png');
    echo $fxImage->getImageBlob();
}

?>