-
-
/*
- * 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；
- *$waterimage 图片水印，即作为水印的图片，暂只支持gif,jpg,png格式；
- *$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 $groundimage 一样。
- * 作者：longware @ 2004-11-3 14:15:13
- */
- function imagewatermark($groundimage,$waterpos=0,$waterimage="",$watertext="",$textfont=5,$textcolor="#ff0000")
- {
- $iswaterimage = false;
- $formatmsg = "暂不支持该文件格式，请用图片处理软件将图片转换为gif、jpg、png格式。";
- //读取水印文件
- if(!empty($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($formatmsg);
- }
- }
- else
- {
- die("需要加水印的图片不存在！");
- }
- //水印位置
- if($iswaterimage)//图片水印
- {
- $w = $water_w;
- $h = $water_h;
- $label = "图片的";
- }
- else//文字水印
- {
- $temp = imagettfbbox(ceil($textfont*2.5),0,"./cour.ttf",$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{
- 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;
- 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
- }
- 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);
- }
- //--------
- if(isset($_files) && !empty($_files['userfile']) && $_files['userfile']['size']>0)
- {
- $uploadfile = "./".time()."_".$_files['userfile']['name'];
- if (copy($_files['userfile']['tmp_name'], $uploadfile))
- {
- echo "ok
";
- //文字水印
- imagewatermark($uploadfile,0,"","http://blog.csdn.net/longware/",5,"#ff0000");
- //图片水印
- //$waterimage="./hanweb_shuiyin.gif";//水印图片路径
- //imagewatermark($uploadfile,0,$waterimage);
- echo "
 ";
- }
- else
- {
- echo "fail
";
- }
- }
- ?>
-
|
