Pimcore\Image\Adapter\ImageMagick::addOverlay PHP Method

    public function addOverlay($image, $x = 0, $y = 0, $alpha = 100, $composite = "COMPOSITE_DEFAULT", $origin = 'top-left')
    {
        $this->saveIfRequired('overlay_first_step');
        $image = PIMCORE_DOCUMENT_ROOT . "/" . ltrim($image, "/");
        if (is_file($image)) {
            //if a specified file as a overlay exists
            $overlayImage = $this->createTmpImage($image, 'overlay');
            $overlayImage->setForceAlpha(true)->addConvertOption('evaluate', "set {$alpha}%");
            //defines the position in order to the origin value
            switch ($origin) {
                case "top-right":
                    $x = $this->getWidth() - $overlayImage->getWidth() - $x;
                    break;
                case "bottom-left":
                    $y = $this->getHeight() - $overlayImage->getHeight() - $y;
                    break;
                case "bottom-right":
                    $x = $this->getWidth() - $overlayImage->getWidth() - $x;
                    $y = $this->getHeight() - $overlayImage->getHeight() - $y;
                    break;
                case "center":
                    $x = round($this->getWidth() / 2) - round($overlayImage->getWidth() / 2) + $x;
                    $y = round($this->getHeight() / 2) - round($overlayImage->getHeight() / 2) + $y;
                    break;
            }
            //top the overlay image
            $overlayImage->save($overlayImage->getOutputPath());
            $this->processOverlay($overlayImage, $composite, $x, $y, $alpha);
        }
        return $this;
    }