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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