Imagick::negateImage
(PECL imagick 2, PECL imagick 3)
Imagick::negateImage — Negates the colors in the reference image
Описание
public Imagick::negateImage
( bool
$gray
, int $channel = Imagick::CHANNEL_DEFAULT
) : boolNegates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated.
Список параметров
-
gray -
Whether to only negate grayscale pixels within the image.
-
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Возвращаемые значения
В случае успешной работы возвращает true.
Ошибки
Вызывает ImagickException при ошибке.
Примеры
Пример #1 Imagick::negateImage()
<?php
function negateImage($imagePath, $grayOnly, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->negateImage($grayOnly, $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>