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ecshop教程:编辑器kindeditor图片上传添加水印功能

2024-04-25 20:38:56
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以前在网站介绍过ecshop更换编辑成kindeditor的方法,但是上传的图片不能自动增加水印,今天把相应方法告诉大家:

在kindeditor/php/upload_json.php中,有两处需要修改的地方。

第一步,在文件末尾添加一个方法

function imageWaterMark($groundImage, $waterPos=0, $waterImage='', $alpha=80, $waterText='', $textFont=9, $textColor='#FF0000'){

$isWaterImage = FALSE;

$formatMsg = '不支持该图片格式!请使用GIF、JPG、PNG格式的图片。';

//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("水印图片不存在!");

}

//水印位置

if($isWaterImage){//图片水印

$w = $water_w;

$h = $water_h;

$label = "图片的";

}

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; // www.zuimoban.com

}

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,100);break;//注意这里的100,经测试,100是图片质量最佳 的,但文件大小会增加很多,95的时候质量还不错,大小和原来的差不多。作者采用95的值。

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);

}

第二步,找到$json = new Services_JSON();(这个文件中有两处,alert($msg)方法里的不用操作),在后面添加如下一段代码

$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'].'/images/water.gif';//水印图片,默认填写空,请将图片上传至网站根目录的images下,例: water.gif

$water_alpha = 50;//水印透明度

$water_text = '';//水印字符串,默认填写空;

//$water_fontfile = $_SERVER['DOCUMENT_ROOT'] .'/upfiles/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);

}

这里只需要上传一张水印图片即可。

完成上述操作后,在用编辑器上传图片就可以实现上图的效果了。

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