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<?php
namespace Charcoal\Image\Effect;
use \InvalidArgumentException;
use \Charcoal\Image\AbstractEffect;
use \Charcoal\Image\ImageInterface;
use \Charcoal\Image\Effect\LayerEffectInterface;
use \Charcoal\Image\Effect\LayerEffectTrait;
/**
* Composite a watermark on top of the image.
*/
abstract class AbstractWatermarkEffect extends AbstractEffect implements LayerEffectInterface
{
use LayerEffectTrait;
* The watermark image source (path or Image).
* @var string|ImageInterface $watermark
private $watermark;
* @param string|ImageInterface $watermark The watermark (path or Image).
* @throws InvalidArgumentException If the watermark value is not a string or an Image.
* @return AbstractMaskEffect Chainable
public function setWatermark($watermark)
if (is_string($watermark) || ($watermark instanceof ImageInterface)) {
$this->watermark = $watermark;
return $this;
} else {
throw new InvalidArgumentException(
'Watermark must be a string'
);
}
* @return string
public function watermark()
return $this->watermark;
locomotivemtl /
charcoal-image
