php生成水印，包括位置和透明度(6)

        }

        return false;

    }

    // water(保存地址,水印图片,水印位置,透明度)

        public function water($filename,$water,$pos=0,$pct=50){

                // 加载水印图片

                $info = $this->getImageInfo($water);

                if(!empty($info[0])){

                        $water_w = $info[0];

                        $water_h = $info[1];

                        $type = $info['type'];

                        $fun  = 'imagecreatefrom'.$type;

                        $waterimg = $fun($water);

                } else{

                        return false;

                }

                // 加载背景图片

                $info = $this->getImageInfo($this->img);

                if(!empty($info[0])){

                        $old_w = $info[0];

                        $old_h = $info[1];

                        $type  = $info['type'];

                        $fun   = 'imagecreatefrom'.$type;