/***************************水印处理*************************/
/*
* 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,$waterPos=9,$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
$waterImage=$_SERVER['DOCUMENT_ROOT'].$waterImage;
if(!empty($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
//取得水印图片的格式
$imgTypeCheck=true;
switch($water_info[2]){
case 1:$water_im = imagecreatefromgif($waterImage);break;
case 2:$water_im = imagecreatefromjpeg($waterImage);break;
case 3:$water_im = imagecreatefrompng($waterImage);break;
default:$imgTypeCheck=false;
}
if(!$imgTypeCheck)$this->error=array('error'=>1,'html'=>$formatMsg);return false;
}
//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
$ground_h = $ground_info[1];//取得背景图片的高
//取得背景图片的格式
$imgTypeCheck=true;
switch($ground_info[2]){
case 1:$ground_im = imagecreatefromgif($groundImage);break;
case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
case 3:$ground_im = imagecreatefrompng($groundImage);break;
default:$imgTypeCheck=false;
}
if(!$imgTypeCheck)$this->error=array('error'=>1,'html'=>$formatMsg);return false;
}else{
$this->error=array('error'=>1,'html'=>'需要加水印的图片不存在!');return false;
}
//水印位置
if($isWaterImage){//图片水印
$w = $water_w;$h = $water_h;$label = "图片的";
}else{//文字水印
$temp = imagettfbbox(ceil($textFont*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);
$this->error=array('error'=>1,'html'=>'文字区域');return false;
}
if( ($ground_w
$this->error=array('error'=>1,'html'=>'需要加水印的图片的长度或宽度比水印'.$label.'还小,无法生成水印!');return false;
}
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-10 是距离右侧10px 可以自己调节posY-10 是距离底部10px 可以自己调节
$posX = $ground_w - $w - 10;$posY = $ground_h - $h - 10;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);
//图片水印
if($isWaterImage){
imagecopy($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( !emptyempty($textColor) && (strlen($textColor)==7) ){
$R = hexdec(substr($textColor,1,2));$G = hexdec(substr($textColor,3,2));$B = hexdec(substr($textColor,5));
}else{
$this->error=array('error'=>1,'html'=>'水印文字颜色格式不正确!');return false;
}
imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
}
//生成水印后的图片
@unlink($groundImage);
//取得背景图片的格式
$imgTypeCheck=true;
switch($ground_info[2]){
case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:$imgTypeCheck=false;
}
if(!$imgTypeCheck)$this->error=array('error'=>1,'html'=>$errorMsg);return false;
//释放内存
if(isset($water_info)) unset($water_info);
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im);
}
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