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Imagick::fxImage

PHP function Edit on GitHub ✎

(PECL imagick 2, PECL imagick 3)

Evaluate expression for each pixel in the image

Description

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.

Parameters

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.

Return Values

Success

Errors/Exceptions

Throws

Examples

Imagick::fxImage()

php

<?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();
}

?>

Source: reference/imagick/imagick/fximage.xml · from the official PHP manual (php/doc-en)