146 lines
3.2 KiB
PHP
146 lines
3.2 KiB
PHP
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<?php
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/**
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* 加水印类
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*/
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class AddWater{
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private $imgPath; // 图片路径
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public function __construct($imgPath="./"){
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$this->imgPath = rtrim($imgPath,"/")."/";
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}
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// 写水印动作
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public function waterInfo($ground,$water,$pos=0,$prefix="lee_",$tm=50){
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$allPathGround = $this->imgPath.$ground;
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$allPathWater = $this->imgPath.$water;
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$groundInfo = $this->imgInfo($allPathGround);
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$waterInfo = $this->imgInfo($allPathWater);
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//判断水印图片是否比原图大
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if(!$newPos=$this->imgPos($groundInfo,$waterInfo,$pos)){
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echo "您的水印图片比原图大哦";
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return false;
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}
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//打开资源
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$groundRes=$this->imgRes($allPathGround,$groundInfo['mime']);
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$waterRes=$this->imgRes($allPathWater,$waterInfo['mime']);
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//整合资源
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$newGround=$this->imgCopy($groundRes,$waterRes,$newPos,$waterInfo,$tm);
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//保存资源
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$this->saveImg($newGround,$ground,$groundInfo['mime'],$prefix);
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}
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private function saveImg($img,$ground,$info,$prefix){
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$path=$this->imgPath.$prefix.$ground;
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switch($info){
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case "image/jpg":
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case "image/jpeg":
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case "image/pjpeg":
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imagejpeg($img,$path);
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break;
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case "image/gif":
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imagegif($img,$path);
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break;
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case "image/png":
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imagepng($img,$path);
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break;
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default:
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imagegd2($img,$path);
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}
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}
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private function imgCopy($ground,$water,$pos,$waterInfo,$tm){
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imagecopymerge($ground,$water,$pos[0],$pos[1],0,0,$waterInfo[0],$waterInfo[1],$tm);
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return $ground;
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}
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private function imgRes($img,$imgType){
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switch($imgType){
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case "image/jpg":
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case "image/jpeg":
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case "image/pjpeg":
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$res=imagecreatefromjpeg($img);
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break;
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case "image/gif":
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$res=imagecreatefromgif($img);
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break;
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case "image/png":
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$res=imagecreatefrompng($img);
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break;
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case "image/wbmp":
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$res=imagecreatefromwbmp($img);
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break;
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default:
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$res=imagecreatefromgd2($img);
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}
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return $res;
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}
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// 位置为
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// 1 左上 2中上 3右上
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// 4 左中 5中中 6右中
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// 7 左下 8中下 9右下
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// 0 随机位置
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private function imgPos($ground,$water,$pos){
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if($ground[0]<$water[0] || $ground[1]<$water[1]) //判断水印与原图比较 如果水印的高或者宽比原图小 将返回假
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return false;
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switch($pos){
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case 1:
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$x=0;
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$y=0;
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break;
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case 2:
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$x=ceil(($ground[0]-$water[0])/2);
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$y=0;
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break;
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case 3:
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$x=$ground[0]-$water[0];
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$y=0;
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break;
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case 4:
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$x=0;
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$y=ceil(($ground[1]-$water[1])/2);
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break;
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case 5:
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$x=ceil(($ground[0]-$water[0])/2);
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$y=ceil(($ground[1]-$water[1])/2);
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break;
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case 6:
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$x=$ground[0]-$water[0];
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$y=ceil(($ground[1]-$water[1])/2);
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break;
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case 7:
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$x=0;
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$y=$ground[1]-$water[1];
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break;
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case 8:
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$x=ceil($ground[0]-$water[0]/2);
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$y=$ground[1]-$water[1];
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break;
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case 9:
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$x=$ground[0]-$water[0];
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$y=$ground[1]-$water[1];
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break;
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case 0:
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default:
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$x=rand(0,$ground[0]-$water[0]);
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$y=rand(0,$ground[1]-$water[1]);
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}
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$xy[]=$x;
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$xy[]=$y;
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return $xy;
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}
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// 获取图片信息的函数
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private function imgInfo($img){
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return getimagesize($img);
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}
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}
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?>
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