Imagick::negateImage

(PECL imagick 2.0.0)

Imagick::negateImage — Negates the colors in the reference image

Descrição

bool Imagick::negateImage ( bool $gray [, int $channel = Imagick::CHANNEL_ALL ] )

Negates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated.

Parâmetros

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.

Valor Retornado

Retorna TRUE no sucesso.

Erros

Lança ImagickException em caso de erro.

Exemplos

Exemplo #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();
}

?>