Swoole\Image::addWaterMark2 PHP Méthode

    public static function addWaterMark2($groundImage, $waterPos = 0, $waterImage = "", $waterText = "", $textFont = 5, $textColor = "#FF0000", $minwidth = 100, $minheight = 100)
    {
        $isWaterImage = false;
        $formatMsg = "暂不支持该文件格式，请用图片处理软件将图片转换为GIF、JPG、PNG格式。";
        //读取水印文件
        if (!empty($waterImage) && file_exists($waterImage)) {
            $isWaterImage = true;
            $water_info = getimagesize($waterImage);
            $water_w = $water_info[0];
            //取得水印图片的宽
            $water_h = $water_info[1];
            //取得水印图片的高
            switch ($water_info[2]) {
                case 1:
                    $water_im = imagecreatefromgif($waterImage);
                    break;
                case 2:
                    $water_im = imagecreatefromjpeg($waterImage);
                    break;
                case 3:
                    $water_im = imagecreatefrompng($waterImage);
                    break;
                default:
                    die($formatMsg);
            }
        }
        //读取背景图片
        if (!empty($groundImage) && file_exists($groundImage)) {
            $ground_info = getimagesize($groundImage);
            $ground_w = $ground_info[0];
            //取得背景图片的宽
            $ground_h = $ground_info[1];
            //取得背景图片的高
            switch ($ground_info[2]) {
                case 1:
                    $ground_im = imagecreatefromgif($groundImage);
                    break;
                case 2:
                    $ground_im = imagecreatefromjpeg($groundImage);
                    break;
                case 3:
                    $ground_im = imagecreatefrompng($groundImage);
                    break;
                default:
                    return false;
            }
        } else {
            return false;
        }
        //水印位置
        if ($isWaterImage) {
            $w = $water_w;
            $h = $water_h;
        } else {
            //取得使用 TrueType 字体的文本的范围
            $temp = imagettfbbox(ceil($textFont * 2.5), 0, self::$waterMarkFontFile, $waterText);
            $w = $temp[2] - $temp[6];
            $h = $temp[3] - $temp[7];
            unset($temp);
        }
        // add
        if ($ground_w < $w || $ground_h < $h || $ground_w < $minwidth || $ground_h < $minheight) {
            return false;
        }
        switch ($waterPos) {
            case 0:
                //随机
                $posX = rand(0, $ground_w - $w);
                $posY = rand(0, $ground_h - $h);
                break;
            case 1:
                //1为顶端居左
                $posX = 0;
                $posY = 0;
                break;
            case 2:
                //2为顶端居中
                $posX = ($ground_w - $w) / 2;
                $posY = 0;
                break;
            case 3:
                //3为顶端居右
                $posX = $ground_w - $w;
                $posY = 0;
                break;
            case 4:
                //4为中部居左
                $posX = 0;
                $posY = ($ground_h - $h) / 2;
                break;
            case 5:
                //5为中部居中
                $posX = ($ground_w - $w) / 2;
                $posY = ($ground_h - $h) / 2;
                break;
            case 6:
                //6为中部居右
                $posX = $ground_w - $w;
                $posY = ($ground_h - $h) / 2;
                break;
            case 7:
                //7为底端居左
                $posX = 0;
                $posY = $ground_h - $h;
                break;
            case 8:
                //8为底端居中
                $posX = ($ground_w - $w) / 2;
                $posY = $ground_h - $h;
                break;
            case 9:
                //9为底端居右
                $posX = $ground_w - $w;
                $posY = $ground_h - $h;
                break;
            default:
                //随机
                $posX = rand(0, $ground_w - $w);
                $posY = rand(0, $ground_h - $h);
                break;
        }
        //设定图像的混色模式
        imagealphablending($ground_im, true);
        if ($isWaterImage) {
            imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w, $water_h);
            //拷贝水印到目标文件
        } else {
            if (!empty($textColor) && strlen($textColor) == 7) {
                $R = hexdec(substr($textColor, 1, 2));
                $G = hexdec(substr($textColor, 3, 2));
                $B = hexdec(substr($textColor, 5));
            } else {
                return false;
            }
            imagestring($ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
        }
        //生成水印后的图片
        @unlink($groundImage);
        switch ($ground_info[2]) {
            case 1:
                imagegif($ground_im, $groundImage);
                break;
            case 2:
                imagejpeg($ground_im, $groundImage);
                break;
            case 3:
                imagepng($ground_im, $groundImage);
                break;
            default:
                return false;
        }
        //释放内存
        if (isset($water_info)) {
            unset($water_info);
        }
        if (isset($water_im)) {
            imagedestroy($water_im);
        }
        unset($ground_info);
        imagedestroy($ground_im);
        return true;
    }