php生成水印类(生成缩略图.缩略水印),gif,png透明水印, 图片水印,文字水印

<?php

/**
 * 测试 of test
 * php生成水印类(生成缩略图.缩略图水印), 网上其它的代码都PNG不透明的问题..这个全透明.包括gif的操作, 包括生成的缩略图 ,支持图片水印,文字水印,水印透明
 * @author wc1217
 */
class test extends spController{

    function index(){
//        $d = spClass('encryptClass')->encode(json_encode(array('wc1217', 'wcwc')));
//        echo $d . '<br>';
//        echo spClass('encryptClass')->decode($d);
        echo filesize('E:\\WEB\\chuangyiwang\\views\\bottom.tpl');
    }

    function waterMarkAndThumb(){
        $file_path = 'E://WEB//chuangyiwang//themes//images//main.png'; //原文件名
        $makeThumb = true; //是否创建缩略图
        $thumbMark = true; //缩略图是否要水印
        $waterText = false; //是否启用文字水印,启用直接使用数组:如下:
        //array('waterText' => "创意革命网 | www.chuangyiwang.com", 'waterTextColor' => "#000000", 'waterTextSize' => '10', 'waterTextFont' => OA_LIB_PATH . '/simsun.ttc')
        $imgWaterPos = 9; //水印位置
        $transparent = 50; //图片水印透明度
        $bigFile = 10; //超过多少M不操作(视php限制内存而定,0为不准定)
        $thumbnail = array(
            'upload_dir' => 'nail',
            'max_width' => 150,
            'max_height' => 400,
            'jpeg_quality' => 80,
            'png_quality' => 9,
        ); //缩略图参数

        if($bigFile && filesize($file_path) > $bigFile * 1024 * 1024)
            return false;
        //后缀
        $extension = strtolower(pathinfo($file_path, PATHINFO_EXTENSION));

        //得到原始文件宽高
        list($img_width, $img_height) = getimagesize($file_path);
        if(!$img_width || !$img_height){
            return false;
        }

        //创建等尺寸的真彩色画布
        $new_img = $this->getImageTrueColor($img_width, $img_height, $extension);
        //生成图片参数
        switch($extension){
            case 'jpg':
            case 'jpeg':
                $src_img = imagecreatefromjpeg($file_path);
                $write_image = 'imagejpeg';
                $image_quality = $thumbnail['jpeg_quality'];
                break;
            case 'bmp':
                $src_img = imagecreatefromwbmp($file_path);
                $write_image = 'imagewbmp';
                $image_quality = null;
                break;
            case 'gif':
                $src_img = imagecreatefromgif($file_path);
                $write_image = 'imagegif';
                $image_quality = null;
                break;
            case 'png':
                $src_img = imagecreatefrompng($file_path);
                $write_image = 'imagepng';
                $image_quality = $thumbnail['png_quality'];
                break;
            default:
                return false;
        }
        //将图载入画布
        imagecopyresampled($new_img, $src_img, 0, 0, 0, 0, $img_width, $img_height, $img_width, $img_height);

        if(is_array($waterText)){
            //得到文字大小信息
            $waterTextInfo = imagettfbbox(ceil($waterText['waterTextSize'] * 1.2), 0, $waterText['waterTextFont'], $waterText['waterText']);
            $maskWidth = $waterTextInfo[4] - $waterTextInfo[6];
            $maskHeight = $waterTextInfo[1] - $waterTextInfo[7];
            unset($waterTextInfo);
            $waterPos = $this->setWaterPos($imgWaterPos, $img_width, $img_height, $maskWidth, $maskHeight);
            //使用文字水印
            $new_img && imagettftext($new_img, $waterText['waterTextSize'], 0, $waterPos[0], $maskHeight + $waterPos[1]
                            , imagecolorallocate($new_img, hexdec(substr($waterText['waterTextColor'], 1, 2)), hexdec(substr($waterText['waterTextColor'], 3, 2))
                                    , hexdec(substr($waterText['waterTextColor'], 5, 2))), $waterText['waterTextFont'], $waterText['waterText']);
        }else{
            //以下为固定水印图片
            $maskWidth = 226;
            $maskHeight = 22;
            $maskHandle = imagecreatefromgif(OA_LIB_PATH . '/waterMask.gif');
            //设置水印位置
            $waterPos = $this->setWaterPos($imgWaterPos, $img_width, $img_height, $maskWidth, $maskHeight);
            //拷贝水印图片
            $new_img && imagecopymerge($new_img, $maskHandle, $waterPos[0], $waterPos[1], 0, 0, $maskWidth, $maskHeight, $transparent);
        }
        //写入文件,原图直接覆盖
        $succeed = $write_image($new_img, $file_path);

        if($makeThumb){
            //创建文件相关
            $new_file_path = 'E:/WEB/test/watermark/'; //dirname($file_path) . DIRECTORY_SEPARATOR . $thumbnail['upload_dir'] . DIRECTORY_SEPARATOR;
            if(!file_exists($new_file_path))
                mkdir($new_file_path, 0777, true);
            $new_file_path .= basename($file_path);

            //生成缩略图比例,缩略图不要水印的话不能直接复制
            $scale = min($thumbnail['max_width'] / $img_width, $thumbnail['max_height'] / $img_height);
            if($thumbMark && $scale >= 1){
                if($file_path !== $new_file_path){
                    return copy($file_path, $new_file_path);
                }
                return true;
            }
            //生成新的宽高
            $new_width = $img_width * $scale;
            $new_height = $img_height * $scale;
            //创建新的宽高真彩色画布
            $thumb_img = $this->getImageTrueColor($new_width, $new_height, $extension);
            //将图载入画布
            imagecopyresampled($thumb_img, ($thumbMark ? $new_img : $src_img), 0, 0, 0, 0, $new_width, $new_height, $img_width, $img_height);
            //写入文件
            $write_image($thumb_img, $new_file_path, $image_quality);
            imagedestroy($thumb_img);
        }
        //销毁对象
        imagedestroy($src_img);
        imagedestroy($new_img);
        return $succeed;
    }

    /**
     * 生成一块真彩色画布
     * @param int $img_width
     * @param int $img_height
     * @param string $img_type
     * @return boolean or imageHandle
     */
    private function getImageTrueColor($img_width, $img_height, $img_type){
        $new_img = imagecreatetruecolor($img_width, $img_height);
        //生成图片参数
        switch($img_type){
            case 'gif':
                imagecolortransparent($new_img, imagecolorallocate($new_img, 0, 0, 0));
                break;
            case 'png':
                imagecolortransparent($new_img, imagecolorallocate($new_img, 0, 0, 0));
                imagealphablending($new_img, false);
                imagesavealpha($new_img, true);
                break;
            default:
                return false;
        }
        return $new_img;
    }

    /**
     * 设置水印位置
     * @param int $waterPosType 位置
     * @param int $groundImageWidth 原图宽
     * @param int $groundImageHeight 原图高
     * @param int $waterWidth 水印宽
     * @param int $waterHeight 水印高
     * @return array include x,y
     */
    function setWaterPos($waterPosType, $groundImageWidth, $groundImageHeight, $waterWidth, $waterHeight){
        switch($waterPosType){
            case 1://1为顶端居左
                $waterPosX = 0;
                $waterPosY = 0;
                break;
            case 2://2为顶端居中
                $waterPosX = ($groundImageWidth - $waterWidth) / 2;
                $waterPosY = 0;
                break;
            case 3://3为顶端居右
                $waterPosX = $groundImageWidth - $waterWidth;
                $waterPosY = 0;
                break;
            case 4://4为中部居左
                $waterPosX = 0;
                $waterPosY = ($groundImageHeight - $waterHeight) / 2;
                break;
            case 5://5为中部居中
                $waterPosX = ($groundImageWidth - $waterWidth) / 2;
                $waterPosY = ($groundImageHeight - $waterHeight) / 2;
                break;
            case 6://6为中部居右
                $waterPosX = $groundImageWidth - $waterWidth;
                $waterPosY = ($groundImageHeight - $waterHeight) / 2;
                break;
            case 7://7为底端居左
                $waterPosX = 0;
                $waterPosY = $groundImageHeight - $waterHeight * rand(115, 125) / 100;
                break;
            case 8://8为底端居中
                $waterPosX = ($groundImageWidth - $waterWidth) / 2;
                $waterPosY = $groundImageHeight - $waterHeight * rand(115, 125) / 100;
                break;
            case 9://9为底端居右
                $waterPosX = $groundImageWidth - $waterWidth;
                $waterPosY = $groundImageHeight - $waterHeight * rand(115, 120) / 100;
                break;
            default://随机
                $waterPosX = rand(0, ($groundImageWidth - $waterWidth));
                $waterPosY = rand(0, ($groundImageHeight - $waterHeight));
        }
        return array($waterPosX, $waterPosY);
    }

}

?>