Imagick::fxImage

(PECL imagick 2, PECL imagick 3)

Imagick::fxImageEvaluate expression for each pixel in the image

Descrizione

public 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.

Elenco dei 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.

Valori restituiti

Restituisce true in caso di successo.

Errori/Eccezioni

Lancia una ImagickException in caso di errore.

Esempi

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();
}

?>