Imagick::negateImage

    (PECL imagick 2, PECL imagick 3)

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

    Descrizione

    public Imagick::negateImage(bool $gray, int $channel = Imagick::CHANNEL_DEFAULT): bool

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

    Elenco dei parametri

    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.

    Valori restituiti

    Restituisce true in caso di successo.

    Errori/Eccezioni

    Lancia una ImagickException in caso di errore.

    Esempi

    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();
    }

    ?>

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