Evaluate expression for each pixel in the image


(PECL imagick 2.0.0)

Imagick::fxImageEvaluate expression for each pixel in the image

Описание

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

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

Список параметров

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.

Возвращаемые значения

В случае успешной работы возвращает TRUE.

Ошибки

Вызывает ImagickException при ошибке.

Примеры

Пример #1 Imagick::fxImage()

<?php
function fxImage() {
    
$imagick = new \Imagick();
    
$imagick->newPseudoImage(200200"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();
}

?>