一个超级强大的图片加水印的类(6)

            case 8 : //下中    www.2cto.com

                $this -> x = ($this -> srcImg_info[0] - $this -> waterImg_info[0]) / 2; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

            case 9 : //下右    

                $this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0] - 20; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

            default : //下右    

                $this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0] - 20; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

        } 

    } 

    /**

     * 加图片水印

     */ 

    private function waterimg () 

    { 

        if ($this -> srcImg_info[0] <= $this -> waterImg_info[0] || $this -> srcImg_info[1] <= $this -> waterImg_info[1]) { 

            echo '图片尺寸太小，无法加水印，请上传一张大图片'; 

            exit(); 

        } 

        //计算水印位置 

        $this->waterpos(); 

        $cut = imagecreatetruecolor($this -> waterImg_info[0], $this -> waterImg_info[1]); 

        imagecopy($cut, $this -> im, 0, 0, $this -> x, $this -> y, $this -> waterImg_info[0],