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php如果在kindeditor中上传图片(单图和多图)添加水印

时间::2014-01-26    来源:本站     作者:wongshing 阅读次数:
自己写的一套系统,用的编辑器是kindeditor,他本身不自带水印,今天简单的研究,发现在kindeditor编辑器基础上加上水印挺简单,下面就代码说明吧,是php版本的噢,其他语言估计也是差不多吧,修改文件upload_json.php

    /*
    * 功能:PHP图片水印 (水印支持图片或文字)
    * 参数:
    * $groundImage 背景图片,即需要加水印的图片,暂只支持GIF,JPG,PNG格式;
    * $waterPos 水印位置,有10种状态,0为随机位置;
    * 1为顶端居左,2为顶端居中,3为顶端居右;
    * 4为中部居左,5为中部居中,6为中部居右;
    * 7为底端居左,8为底端居中,9为底端居右;
    * $waterImage 图片水印,即作为水印的图片,暂只支持GIF,JPG,PNG格式;
    * $alpha 水印透明度
    * $waterText 文字水印,即把文字作为为水印,支持ASCII码,不支持中文;
    * $textFont 文字大小,值为1、2、3、4或5,默认为5;
    * $textColor 文字颜色,值为十六进制颜色值,默认为#FF0000(红色);
    *
    * 注意: Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
    * $waterImage 和 $waterText 最好不要同时使用,选其中之一即可,优先使用 $waterImage。
    * 当$waterImage有效时,参数$waterString、$stringFont、$stringColor均不生效。
    * 加水印后的图片的文件名和 $groundImage 一样。
    */
    function imageWaterMark($groundImage, $waterPos=0, $waterImage='', $alpha=80, $waterText='', $water_fontfile, $textFont=9, $textColor='#FF0000'){
    $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。';
    $fontFile = $water_fontfile;
    //读取水印文件
    if(!empty($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])//取得水印图片的格式
    {
    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])//取得背景图片的格式
    {
    case 1:$ground_im = imagecreatefromgif($groundImage);break;
    case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
    case 3:$ground_im = imagecreatefrompng($groundImage);break;
    default:die($formatMsg);
    }
    }else{
    alert("需要加水印的图片不存在!");
    }
    //水印位置
    if($isWaterImage)//图片水印
    {
    $w = $water_w;
    $h = $water_h;
    $label = "图片的";
    }else{//文字水印
    $temp = imagettfbbox($textFont, 0, $fontFile, $waterText);//取得使用 TrueType 字体的文本的范围
    $w = $temp[2] - $temp[6];
    $h = $temp[3] - $temp[7];
    unset($temp);
    $label = "文字区域";
    }
    if(($ground_w<$w) || ($ground_h<$h)){
    echo "需要加水印的图片的长度或宽度比水印".$label."还小,无法生成水印!";
    return;
    }
    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 - $h;
    if(!$isWaterImage){
    $posY = $ground_h - $h-20;
    }
    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($isWaterImage){//图片水印
    //imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件
    //生成混合图像
    imagecopymerge($ground_im, $water_im, $posX, $posY, 0, 0, $water_w, $water_h, $alpha);
    }else{//文字水印
    if( !empty($textColor) && (strlen($textColor)==7)){
    $R = hexdec(substr($textColor,1,2));
    $G = hexdec(substr($textColor,3,2));
    $B = hexdec(substr($textColor,5));
    }else{
    die("水印文字颜色格式不正确!");
    }
    imagestring($ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
    }
    //生成水印后的图片
    @unlink($groundImage);
    switch($ground_info[2])//取得背景图片的格式
    {
    case 1:imagegif($ground_im,$groundImage);break;
    case 2:imagejpeg($ground_im,$groundImage);break;
    case 3:imagepng($ground_im,$groundImage);break;
    default:die($errorMsg);
    }
    //释放内存
    if(isset($water_info)) unset($water_info);
    if(isset($water_im)) imagedestroy($water_im);
    unset($ground_info);
    imagedestroy($ground_im);
    } 然后在第一个加上
 
$json = new Services_JSON();
    	/*水印配置开始*/
    $water_mark = 1;//1为加水印, 其它为不加
    $water_pos = 9;//水印位置,10种状态【0为随机,1为顶端居左,2为顶端居中,3为顶端居右;4为中部居左,5为中部居中,6为中部居右;7为底端居左,8为底端居中,9为底端居】
    $water_img = $_SERVER['DOCUMENT_ROOT'] .'/assets/img/water.gif';//水印图片,默认填写空,请将图片上传至:attachments/water/目录下,例: logo.gif
    $water_alpha = 60;//水印透明度
    $water_text = '';//水印字符串,默认填写空;
    //$water_fontfile = $_SERVER['DOCUMENT_ROOT'] .'attachments/fonts/arial.ttf';//文字水印使用的字体;
    if($water_mark == 1){
    imageWaterMark($file_path, $water_pos, $water_img, $water_alpha, $water_text, $water_fontfile);
    }
    /*水印配置结束*/
总结:加上水印并不难,但是值得注意是字体和图片类型,只能是png gif jpg

,好是图片和文字水印只用一种,如果不要留背景建议使用png或者gif,以上代码有个缺点就是背景去不掉,那么可以参考以下方法,测试成功!记得改变函数

waterMark($file_path, $water_img, $water_alpha,90, $water_pos,"","","");

 /**
     * 为图片添加水印
     * @param $image  原图片
     * @param $waterFile  水印图片
     * @param $waterTrans  透明度
     * @param $waterQuality  jpg水印图质量
     * @param $waterPlace  水印位置
     * @param $minWidth  添加条件:原图最小宽度
     * @param $minHeight 添加条件:  原图最小高度
     * @param $watername 水印图片保存位置
     */
function waterMark($image,$waterFile, $waterTrans = 50, $waterQuality = 90,
                              $waterPlace = 9, $minWidth='', $minHeight = '', $watername = '') {
        if(empty($watername)) $watername = $image;
        if (! empty ( $waterFile ) && file_exists ( $waterFile )) {
            //水印图信息
            $ifwaterimage = 1;
            $water_info = getimagesize ( $waterFile );
            $width = $water_info [0];
            $height = $water_info [1];
            $source_info = getimagesize ( $image );
            //原图信息
            $source_w = $source_info [0];
            $source_h = $source_info [1];
            !$minWidth && $minWidth = $width;
            !$minHeight && $minHeight = $height;
            if ($source_w < $minWidth || $source_h < $minHeight)
                return false;
            switch ($source_info [2]) {
                case 1 :
                    $source_img = imagecreatefromgif ( $image );
                    break;
                case 2 :
                    $source_img = imagecreatefromjpeg ( $image );
                    break;
                case 3 :
                    $source_img = imagecreatefrompng ( $image );
                    break;
                default :
                    return false;
            }
            switch ($water_info [2]) {
                case 1 :
                    $water_img = imagecreatefromgif ( $waterFile );
                    break;
                case 2 :
                    $water_img = imagecreatefromjpeg ( $waterFile );
                    break;
                case 3 :
                    $water_img = imagecreatefrompng ( $waterFile );
                    break;
                default :
                    return;
            }
        } else {
            return ;
        }
        switch ($waterPlace) {
            case 0 :
                $wx = rand ( 0, ($source_w - $width) );
                $wy = rand ( 0, ($source_h - $height) );
                break;
            case 1 :
                $wx = 5;
                $wy = 5;
                break;
            case 2 :
                $wx = ($source_w - $width) / 2;
                $wy = 0;
                break;
            case 3 :
                $wx = $source_w - $width;
                $wy = 0;
                break;
            case 4 :
                $wx = 0;
                $wy = ($source_h - $height) / 2;
                break;
            case 5 :
                $wx = ($source_w - $width) / 2;
                $wy = ($source_h - $height) / 2;
                break;
            case 6 :
                $wx = $source_w - $width;
                $wy = ($source_h - $height) / 2;
                break;
            case 7 :
                $wx = 0;
                $wy = $source_h - $height;
                break;
            case 8 :
                $wx = ($source_w - $width) / 2;
                $wy = $source_h - $height;
                break;
            case 9 :
                $wx = $source_w - $width;
                $wy = $source_h - $height;
                break;
            default :
                $wx = rand ( 0, ($source_w - $width) );
                $wy = rand ( 0, ($source_h - $height) );
                break;
        }
        if ($water_info [2] == 3) {  //png  的图片实现透明度有些问题            
            imageCopy ( $source_img, $water_img, $wx, $wy, 0, 0, $width, $height );
//          imagecopymerge ( $source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $waterTrans );
        } else {                        
            $r = imagecopymerge ( $source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $waterTrans );
        }        
        switch ($source_info [2]) {
            case 1 :
                imagegif ( $source_img, $watername );
                break;
            case 2 :
                imagejpeg ( $source_img, $watername, $waterQuality );
                break;
            case 3 :
                imagepng ( $source_img, $watername );
                break;
            default :
                return;
        }
        if (isset ( $water_info )) {
            unset ( $water_info );
        }
        if (isset ( $water_img )) {
            imagedestroy ( $water_img );
        }
        unset ( $source_info );
        imagedestroy ( $source_img );
        return true;
    }

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