PHP水印类,支持添加图片、文字、填充颜色区域的实现

/**

 * 图片加水印类，支持文字水印、透明度设置、自定义水印位置等。

 * 使用示例：

 *   $obj = new WaterMask($imgFileName);       //实例化对象

 *   $obj->$waterType = 1;           //类型：0为文字水印、1为图片水印

 *   $obj->$transparent = 45;         //水印透明度

 *   $obj->$waterStr = 'icp.niufee.com';        //水印文字

 *   $obj->$fontSize = 18;           //文字字体大小

 *   $obj->$fontColor = array(255,255,255);        //水印文字颜色（RGB）

 *   $obj->$fontFile = 'AHGBold.ttf';       //字体文件

 *   ……

 *   $obj->output();              //输出水印图片文件覆盖到输入的图片文件

 * @modify liuzp111

 */

classWaterMask{

  public$waterTypeImage  = false;               //水印类型：启用图片水印

  public$waterTypeStr   = false;         //水印类型：启用文字水印

  public$pos       = 0;         //水印位置

  public$transparent   = 45;        //水印透明度(0---100)数值越大越不透明

  public$waterStr     ='icp.niufee.com';     //水印文字

  public$fontSize     = 14;        //文字字体大小

  public$fontColor    =array(0,0,0);         //水印文字颜色（RGB） 默认黑色

  public$fontFile     ='./font/simfang.ttf';     //字体文件

  public$waterImg     ='logo.png';      //水印图片

  private$srcImg      ='';        //需要添加水印的图片

  private$im        ='';        //图片句柄

  private$water_im     ='';        //水印图片句柄

  private$srcImg_info   ='';        //图片信息

  private$waterImg_info  ='';        //水印图片信息

  private$str_w      ='';        //水印文字宽度

  private$str_h      ='';        //水印文字高度

  private$x        ='';        //水印X坐标

  private$y        ='';        //水印y坐标

  public$output_img    ='';                 //存储输出图片到哪里

  public$is_draw_rectangle= false;                 //是否绘制矩形区域 （暂不支持自定义位置）

  //public $rectange_color   = '';                  //绘制矩形区域的颜色 

  private$result_array   =array();              //结果数组

  publicfunction__construct($img) {   //析构函数

    //$this->srcImg = file_exists($img) ? $img : die('"'.$img.'" 源文件不存在！');

    if(file_exists($img)){

      $this->srcImg =$img;

    }else{

      returnarray('data'=>'','info'=>'源文件不存在!','status'=>0);

    }

  }

  privatefunctionimginfo() { //获取需要添加水印的图片的信息，并载入图片。

    $this->srcImg_info =getimagesize($this->srcImg);

    switch($this->srcImg_info[2]) {

      case3:

        $this->im = imagecreatefrompng($this->srcImg);

        break1;

      case2:

        $this->im = imagecreatefromjpeg($this->srcImg);

        break1;

      case1:

        $this->im = imagecreatefromgif($this->srcImg);

        break1;

      default:

        //die('原图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。');

        returnarray('data'=>'','info'=>'原图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。','status'=>0);

    }

  }

  privatefunctionwaterimginfo() { //获取水印图片的信息，并载入图片。

    $this->waterImg_info =getimagesize($this->waterImg);

    switch($this->waterImg_info[2]) {

      case3:

        $this->water_im = imagecreatefrompng($this->waterImg);

        break1;

      case2:

        $this->water_im = imagecreatefromjpeg($this->waterImg);

        break1;

      case1:

        $this->water_im = imagecreatefromgif($this->waterImg);

        break1;

      default:

        //die('水印图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。');

         returnarray('data'=>'','info'=>'水印图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。','status'=>0);

    }

  }

  privatefunctionwaterpos() { //水印位置算法

    switch($this->pos) {

      case0:  //随机位置

        $this->x = rand(0,$this->srcImg_info[0]-$this->waterImg_info[0]);

        $this->y = rand(0,$this->srcImg_info[1]-$this->waterImg_info[1]);

        break1;

      case1:  //上左

        $this->x = 0;

        $this->y = 0;

        break1;

      case2:  //上中

        $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

        $this->y = 0;

        break1;

      case3:  //上右

        $this->x =$this->srcImg_info[0]-$this->waterImg_info[0];

        $this->y = 0;

        break1;

      case4:  //中左

        $this->x = 0;

        $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

        break1;

      case5:  //中中

        $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

        $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

        break1;

      case6:  //中右

        $this->x =$this->srcImg_info[0]-$this->waterImg_info[0];

        $this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;

        break1;

      case7:  //下左

        $this->x = 0;

        $this->y =$this->srcImg_info[1]-$this->waterImg_info[1];

        break1;

      case8:  //下中

        $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

        $this->y =$this->srcImg_info[1]-$this->waterImg_info[1];

        break1;

      case9:  //下中偏上100px

        $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

        $this->y =$this->srcImg_info[1]-$this->waterImg_info[1] - 100;

        break1;

      default: //下右

        $this->x =$this->srcImg_info[0]-$this->waterImg_info[0];

        $this->y =$this->srcImg_info[1]-$this->waterImg_info[1];

        break1;

    }

  }

  /**

   * 水印文字图片位置，根据需求调整

   */

  privatefunctionwaterposStr() {

    $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;

    $this->y =$this->srcImg_info[1]-$this->waterImg_info[1] - 3;   

  }

  privatefunctionwaterimg($type='') {

    if($this->srcImg_info[0] <=$this->waterImg_info[0] ||$this->srcImg_info[1] <=$this->waterImg_info[1]){

      //die('水印比原图大！');

      returnarray('data'=>'','info'=>'水印比原图大!','status'=>0);

    }

    if($type=='waterstr'){

      $this->waterposStr();

    }else{

      $this->waterpos();

    }

    $cut= imagecreatetruecolor($this->waterImg_info[0],$this->waterImg_info[1]);

    imagecopy($cut,$this->im,0,0,$this->x,$this->y,$this->waterImg_info[0],$this->waterImg_info[1]);

    $pct=$this->transparent;

    imagecopy($cut,$this->water_im,0,0,0,0,$this->waterImg_info[0],$this->waterImg_info[1]);

    imagecopymerge($this->im,$cut,$this->x,$this->y,0,0,$this->waterImg_info[0],$this->waterImg_info[1],$pct);

  }

  privatefunctionwaterstr() {

    $rect= imagettfbbox($this->fontSize,0,$this->fontFile,$this->waterStr);

    $w=abs($rect[2]-$rect[6]);

    $h=abs($rect[3]-$rect[7]);

    $fontHeight=$this->fontSize;

    $this->water_im = imagecreatetruecolor($w,$h);

    imagealphablending($this->water_im,false);

    imagesavealpha($this->water_im,true);

    $white_alpha= imagecolorallocatealpha($this->water_im,255,255,255,127);

    imagefill($this->water_im,0,0,$white_alpha);

    $color= imagecolorallocate($this->water_im,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);

    imagettftext($this->water_im,$this->fontSize,0,0,$this->fontSize,$color,$this->fontFile,$this->waterStr);

    $this->waterImg_info =array(0=>$w,1=>$h);

    $this->waterimg($type='waterstr');

  }

  /**

   * 绘制矩形区

   * bool imagefilledrectangle ( resource $image , int $x1 , int $y1 , int $x2 , int $y2 , int $color )

   * bool imagerectangle ( resource $image , int $x1 , int $y1 , int $x2 , int $y2 , int $col )

   * @author liuzp111

   */

  publicfunctiondrawRectangle()

  {

    //imagefill($im,0,0,$gray);//填充资源，填充的坐标（类似PS魔棒），颜色

    /*

     *  1--------------画长方形--------------

     *  bool imagerectangle ( resource $image , int $x1 , int $y1 , int $x2 , int $y2 , int $col )

     *  参数: 画布资源, 左上角x坐标,左上y坐标,右下x坐标,右下y坐标,颜色

     */

    $color= imagecolorallocate($this->im,255,255,255);//创建矩形边框颜色和填充颜色

    //=========================================================================

    //绘制矩形区域并填充

    // 参数说明：

    //bool imagefilledrectangle ( resource $image , int $x1 , int $y1 , int $x2 , int $y2 , int $color )

    // im:为将图像载入为图像资源

    // $x1:表示矩形左上角的X坐标

    // $y1:表示矩形左上角的Y坐标

    // $x2:表示矩形右下角的X坐标

    // $y2:表示矩形右下角的Y坐标

    // $color:为填充的RGB颜色

    //

    imagefilledrectangle($this->im,3,$this->srcImg_info[1] - 20,$this->srcImg_info[0]-3,$this->srcImg_info[1]-3,$color);

    //不要使用下方的函数填充，下方填充函数为魔棒填充，容易导致填充不完整

    //imagefill($this->im,$this->srcImg_info[0]/2,$this->srcImg_info[1]-8,$color);//填充资源，填充的坐标（魔棒），颜色

  }

  functionoutput() {

    $this->imginfo();

    //是否创建矩形区域

    if($this->is_draw_rectangle){

      $this->drawRectangle();

    }

    if($this->waterTypeStr ) {

      $this->waterstr();

    }

    if($this->waterTypeImage )

    {

      $this->waterimginfo();

      $this->waterimg();

    }

    switch($this->srcImg_info[2]) {

      case3:

        $res_output= imagepng($this->im,$this->output_img);

        break1;

      case2:

        $res_output= imagejpeg($this->im,$this->output_img);

        break1;

      case1:

        $res_output= imagegif($this->im,$this->output_img);

        break1;

      default:

        // die('添加水印失败！');

        returnarray('data'=>'','info'=>'添加水印失败!','status'=>0);

        break;

    }

    imagedestroy($this->im);

    imagedestroy($this->water_im);

    returnarray('data'=>$res_output,'info'=>'添加水印成功!','status'=>1);

  }

}

$file='58368dddc8c51_22';//需要加水印的图片

$file_ext='.jpeg';//扩展名

$imgFileName='./'.$file.$file_ext;//需要加水印图片路径

$obj=newWaterMask($imgFileName);//实例化对象

$obj->waterTypeStr = true;    //开启文字水印     

$obj->waterTypeImage = true;   //开启图片水印 

$obj->pos = 9;        //定义水印图片位置

$obj->waterImg ='./water.png';     //水印图片    

$obj->transparent = 100;         //水印透明度

$obj->waterStr ='保险经纪人：刘测试 电话：02052552';      //水印文字

$obj->fontSize = 9;           //文字字体大小

$obj->fontColor =array(0,0,0);       //水印文字颜色（RGB）

$obj->fontFile ='./font/msyh.ttc';   //字体文件，这里是微软雅黑

$obj->is_draw_rectangle = TRUE;     //开启绘制矩形区域

$obj->output_img ='./'.$file.'_n'.$file_ext;//输出的图片路径

$obj->output();