加水印类

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http://hi.baidu.com/%C0%BC%C0%BCsns/blog/item/534b78915575281b7bf48017.html
http://www.cardii.net/php-use-imagemagick/
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http://hi.baidu.com/%D5%E4%B2%D8%B5%C4%C7%E9%CA%E9/blog
<?php

class Image {

/**
* 加给图片加水印
*
* @param strimg $groundImage 要加水印地址
* @param int $waterPos 水印位置
* @param string $waterImage 水印图片地址
* @param string $waterText 文本文字
* @param int $textFont 文字大小
* @param string $textColor 文字颜色
* @param int $minWidth 小于此值不加水印
* @param int $minHeight 小于此值不加水印
* @param float $alpha 透明度
* @return FALSE
* @author liyonghua 2008-10-28 修改中...
*/
public static function waterMark($groundImage , $waterPos = 0 , $waterImage = "" , $waterText = "" , $textFont = 15 , $textColor = "#FF0000",$minWidth='100',$minHeight='100',$alpha=0.9){
$isWaterImg = FALSE;
$bg_h = $bg_w = $water_h = $water_w = 0;
//获取背景图的高，宽
if(is_file($groundImage) && !empty($groundImage)){
   $bg = new Imagick();
   $bg ->readImage($groundImage);
   $bg_h = $bg->getImageHeight();
   $bg_w = $bg->getImageWidth();
}
//获取水印图的高，宽
if(is_file($waterImage) && !empty($waterImage)){
   $water = new Imagick($waterImage);
   $water_h = $water->getImageHeight();
   $water_w = $water->getImageWidth();
}
//如果背景图的高宽小于水印图的高宽或指定的高和宽则不加水印
if($bg_h < $minHeight || $bg_w < $minWidth || $bg_h < $water_h || $bg_w < $water_w ) {
   return ;
}else {
   $isWaterImg = TRUE;
}
//加水印
if($isWaterImg){  
   $dw = new ImagickDraw();  
   //加图片水印
   if(is_file($waterImage)){
    $water->setImageOpacity($alpha);
    $dw -> setGravity($waterPos);
    $dw -> composite($water->getImageCompose(),0,0,50,0,$water);
    $bg -> drawImage($dw);
    if(!$bg -> writeImage($groundImage)){
     return FALSE;
    }  
   }else{
    //加文字水印
    $dw -> setFontSize($textFont);
    $dw -> setFillColor($textColor);
    $dw -> setGravity($waterPos);
    $dw -> setFillAlpha($alpha);
    $dw -> annotation(0,0,$waterText);
    $bg -> drawImage($dw);
    if(!$bg -> writeImage($groundImage)){
     return FALSE;
    }
   }
}
}

/**
     * 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 $groundImage 一样。
     * 作者：longware @ 2004-11-3 14:15:13
     *
     */
public static function waterMark2($groundImage , $waterPos = 0 , $waterImage = "" , $waterText = "" , $textFont = 5 , $textColor = "#FF0000",$minwidth,$minheight){  
   $isWaterImage = FALSE ;
//   $waterImage = SYSROOTPATH . $waterImage;
  
   $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 , SYSROOTPATH."images/watermark/ant1.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" ;
           }
         // add
           if( ( $ground_w < $w ) || ( $ground_h < $h ) || ( $ground_w < $minwidth ) || ( $ground_h < $minheight ) ){
           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 );
}

}//end class

?>