Imagick::negateImage

    (PECL imagick 2, PECL imagick 3)

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

    Опис

    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.

    Параметри

    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.

    Значення, що повертаються

    Повертає true в разі успіху.

    Помилки/виключення

    Кидає ImagickException в разі помилки.

    Приклади

    Приклад #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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