__construct() __construct(integer $amount) Contrast constructor. Parameters integer $amount The amount of contrast to apply. >= -100 and <= -1 to reduce. 0 for no change. >= 1 and <= 100 to increase.
apply() apply(\Grafika\Gd\Image $image) : \Grafika\Gd\Image Parameters \Grafika\Gd\Image $image Returns \Grafika\Gd\Image