function execute()
 {
     global $REX;
     // -------------------------------------- CONFIG
     $brandimage = $REX['MEDIAFOLDER'] . '/' . $this->params['brandimage'];
     if (!file_exists($brandimage) || !is_file($brandimage)) {
         $brandimage = dirname(__FILE__) . '/../../media/brand.gif';
     }
     // Abstand vom Rand
     $padding_x = -10;
     if (isset($this->params['padding_x'])) {
         $padding_x = (int) $this->params['padding_x'];
     }
     $padding_y = -10;
     if (isset($this->params['padding_y'])) {
         $padding_y = (int) $this->params['padding_y'];
     }
     // horizontale ausrichtung: left/center/right
     $hpos = 'right';
     if (isset($this->params['hpos'])) {
         $hpos = (string) $this->params['hpos'];
     }
     // vertikale ausrichtung:   top/center/bottom
     $vpos = 'bottom';
     if (isset($this->params['vpos'])) {
         $vpos = (string) $this->params['vpos'];
     }
     // -------------------------------------- /CONFIG
     $brand = new rex_image($brandimage);
     $brand->prepare();
     $gdbrand =& $brand->getImage();
     $gdimage =& $this->image->getImage();
     $image_width = $this->image->getWidth();
     $image_height = $this->image->getHeight();
     $brand_width = $brand->getWidth();
     $brand_height = $brand->getHeight();
     switch ($hpos) {
         case 'left':
             $dstX = 0;
             break;
         case 'center':
             $dstX = (int) (($image_width - $brand_width) / 2);
             break;
         case 'right':
         default:
             $dstX = $image_width - $brand_width;
     }
     switch ($vpos) {
         case 'top':
             $dstY = 0;
             break;
         case 'center':
             $dstY = (int) (($image_height - $brand_height) / 2);
             break;
         case 'bottom':
         default:
             $dstY = $image_height - $brand_height;
     }
     imagealphablending($gdimage, true);
     imagecopy($gdimage, $gdbrand, $dstX + $padding_x, $dstY + $padding_y, 0, 0, $brand_width, $brand_height);
     $brand->destroy();
 }