(PECL imagick 2, PECL imagick 3)
Imagick::negateImage — Negates the colors in the reference image
Negates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated.
gray
Whether to only negate grayscale pixels within the image.
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.
Restituisce true
in caso di successo.
Lancia una ImagickException in caso di errore.
Example #1 Imagick::negateImage()
<?php
function negateImage($imagePath, $grayOnly, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->negateImage($grayOnly, $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>