PHP水印类,支持添加图片、文字、填充颜色区域的实现

*自己整理的一个水印类*

支持添加图片、文字、填充颜色区域

public $waterStr = 'icp.niufee.com'; //水印文字
public $fontSize = 14; //文字字体大小
public $fontColor = array(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 $result_array = array(); //结果数组
public function __construct($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{
return array('data'=>'','info'=>'源文件不存在!','status'=>0);
}
}

private function imginfo() { //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]) {
case 3:
$this->im = imagecreatefrompng($this->srcImg);
break 1;
case 2:
$this->im = imagecreatefromjpeg($this->srcImg);
break 1;
case 1:
$this->im = imagecreatefromgif($this->srcImg);
break 1;
default:
//die('原图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。');
return array('data'=>'','info'=>'原图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。','status'=>0);
}
}

private function waterimginfo() { //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]) {
case 3:
$this->water_im = imagecreatefrompng($this->waterImg);
break 1;
case 2:
$this->water_im = imagecreatefromjpeg($this->waterImg);
break 1;
case 1:
$this->water_im = imagecreatefromgif($this->waterImg);
break 1;
default:
//die('水印图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。');
return array('data'=>'','info'=>'水印图片（'.$this->srcImg.'）格式不对，只支持PNG、JPEG、GIF。','status'=>0);
}
}
private function waterpos() { //水印位置算法
switch ($this->pos) {
case 0: //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]);
break 1;
case 1: //上左
$this->x = 0;
$this->y = 0;
break 1;
case 2: //上中
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = 0;
break 1;
case 3: //上右
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0];
$this->y = 0;
break 1;
case 4: //中左
$this->x = 0;
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 5: //中中
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 6: //中右
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0];
$this->y = ($this->srcImg_info[1]-$this->waterImg_info[1])/2;
break 1;
case 7: //下左
$this->x = 0;
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1];
break 1;
case 8: //下中
$this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1];
break 1;
case 9: //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;
break 1;
default: //下右
$this->x = $this->srcImg_info[0]-$this->waterImg_info[0];
$this->y = $this->srcImg_info[1]-$this->waterImg_info[1];
break 1;
}
}
/**

• 水印文字图片位置，根据需求调整
  */
  private function waterposStr() {
  $this->x = ($this->srcImg_info[0]-$this->waterImg_info[0])/2;
  $this->y = $this->srcImg_info[1]-$this->waterImg_info[1] - 3;
  }
  private function waterimg($type='') {
  if ($this->srcImg_info[0] <= $this->waterImg_info[0] || $this->srcImg_info[1] <= $this->waterImg_info[1]){
  //die('水印比原图大！');
  return array('data'=>'','info'=>'水印比原图大!','status'=>0);
  }
  if($type == 'waterstr'){
  $this->waterposStr();
  }else{
  $this->waterpos();
  }
  $cut = imagecreatetruecolor($this->waterImg_info[0],$this->waterImg_info[1]);
  imagecopy($cut,$this->im,$this->x,$this->y,$this->waterImg_info[0],$this->waterImg_info[1]);
  $pct = $this->transparent;
  imagecopy($cut,$this->water_im,$this->waterImg_info[1]);
  imagecopymerge($this->im,$cut,$this->waterImg_info[1],$pct);
  }

private function waterstr() {
$rect = imagettfbbox($this->fontSize,$this->fontFile,$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,127);
imagefill($this->water_im,$white_alpha);
$color = imagecolorallocate($this->water_im,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);
imagettftext($this->water_im,$this->fontSize,$color,$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 $col )
• @author liuzp111
  /
  public function drawRectangle()
  {
  //imagefill($im,$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 $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);//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 $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

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