PHP 5.4.31 Released

Imagick::fxImage

(PECL imagick 2.0.0)

Imagick::fxImageEvaluate expression for each pixel in the image

Beschreibung

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.

Parameter-Liste

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.

R├╝ckgabewerte

Liefert TRUE bei Erfolg.

Fehler/Exceptions

Wirft ImagickException bei Fehlern.

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thomasgf22 at NOSPAM dot gmail dot com
2 months ago
Beware that fxImage return value's type is a new object(Imagick), opposing the current documentation (boolean). Therefore it does not affect the caller object. Example:
<?php
            $canvas
= new Imagick();
           
$canvas->newImage(256, 256, "white", "jpg");

           
$gradient = new Imagick();
           
$gradient->newPseudoImage(256, 256, "gradient:white-black");
           
$canvas->compositeImage( $gradient, imagick::COMPOSITE_OVER, 0, 0 );
           
$canvas->rotateImage(new ImagickPixel(), 90);
           
/*instead of just $canvas->fxImage("floor(s*10+0.5)/10"); we must store fxImage()'s result*/
           
$canvas= $canvas->fxImage("floor(s*10+0.5)/10");

           
header( "Content-Type: image/jpg" );
            echo
$canvas;
?>
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