A super powerful class for adding watermarks to images_PHP Tutorial

I had nothing to do in the afternoon, so I wrote a class for adding watermarks to pictures. This class implements adding text watermarks to pictures, adding picture watermarks, and also implements the transparency function for all netizens to learn and communicate

/**

* Add watermark category, support text, picture watermark and transparency setting, watermark picture background is transparent.

* @author litx date:2011-12-05 at 3 pm at Micron Qvod R&D Center

​*/

class WaterMask

{

/**

* Watermark type

* @var int $waterType 0 is text watermark; 1 is picture watermark

​​*/

Private $waterType = 1;

/**

* Watermark position type

* @var int $pos Default is 9 (lower right corner)

​​*/

Private $pos = 9;

/**

* Watermark transparency

* @var int $transparent Watermark transparency (the smaller the value, the more transparent)

​​*/

private $transparent = 20;

/**

* If it is a text watermark, you need to add the watermark text

* @var string $waterStr Default value (Li Tiexiong’s personal collection)

​​*/

private $waterStr = 'Personal portfolio';

/**

* Text font size

* @var int $fontSize Font size

​​*/

private $fontSize = 14;

/**

* Watermark text color (RGB)

* @var array $fontColor Watermark text color (RGB)

​​*/

Private $fontColor = array (255, 255, 255);

/**

* Font file

* @var unknown_type

​​*/

Private $fontFile = 'AHGBold.ttf';

/**

* Watermark image

* @var string $waterImg

​​*/

Private $waterImg = 'logo.png';

/**

* Pictures that need to be watermarked

* @var string $srcImg

​​*/

Private $srcImg = '';

/**

* Image handle 

* @var string $im

​​*/

private $im = '';

/**

* Watermark image handle

* @var string $water_im

​​*/

private $water_im = '';

/**

* Picture information

* @var array $srcImg_info

​​*/

Private $srcImg_info = '';

/**

* Watermark image information

* @var array $waterImg_info

​​*/

Private $waterImg_info = '';

/**

* Watermark text width

* @var int $str_w

​​*/

private $str_w = '';

/**

* Watermark text height

* @var int $str_h

​​*/

​ private $str_h = '';  

/**

* Watermark X coordinates

* @var int $x

​​*/

private $x = '';

/**

* Watermark y coordinates

* @var int $y

​​*/

private $y = '';

/**

* Constructor, initialize the source image by passing in the source image that needs to be watermarked

* @param string $img Source image that needs to be watermarked

​​*/

Public function __construct ($img)

{ 

If(file_exists($img)){//The source file exists

                $this -> srcImg = $img;

          }else{//The source file does not exist

echo 'The source file'.$img.' does not exist, please check whether the file path is correct';

exit();

         } 

                                                       

}  

/**

* Get the information of the picture that needs to be watermarked, and load the picture

​​*/

Public function imginfo ()

                                          

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

        var_dump($this -> srcImg_info);exit();

switch ($this -> srcImg_info[2]) {

case 3 ://png

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

                   break 1;

case 2: // jpeg/jpg

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

                   break 1;

case 1: //gif

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

                   break 1;

                                                                                                                                                                                                                                                              default

Echo 'source picture file'. $ This -& gt; srcimg. 'Format is incorrect. At present, this function only supports PNG, JPEG, GIF picture watermark function';

exit();

         } 

}  

/**

* Get the information of the watermark image and load the image

​​*/

Private function waterimginfo ()

{ 

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

switch ($this -> waterImg_info[2]) {

case 3:

$ This -& gt; water_im = ImageCreateFrompng ($ this -& gt; waterimg);

                   break 1;

           case 2:

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

                   break 1;

case 1 :

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

                   break 1;

                                                                                                                                                                                                                                                              default

Echo 'source picture file'. $ This -& gt; srcimg. 'Format is incorrect. At present, this function only supports PNG, JPEG, GIF picture watermark function';

exit();

         } 

}  

/**

* Watermark position algorithm 

​​*/

private function waterpos ()

{ 

                                                       

switch ($this -> pos) {

             case 0: //Random position                                      

                            $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: // Upper left

$this -> x = 20;

$this -> y = 20;

                   break 1;

case 2: //upper middle

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

$this -> y = 20;

Break 1;

Case 3: //Top right

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

$this -> y = 20;

                   break 1;

case 4: //center left

$this -> x = 20;

                         $this -> y = ($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] - 20; 

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

                break 1; 

            case 7 : //下左    

                $this -> x = 20; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

            case 8 : //下中    www.2cto.com

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

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

            case 9 : //下右    

                $this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0] - 20; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

            default : //下右    

                $this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0] - 20; 

                $this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20; 

                break 1; 

        } 

    } 

    /**

* Add image watermark

​​*/ 

    private function waterimg () 

    { 

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

            echo '图片尺寸太小，无法加水印，请上传一张大图片'; 

            exit(); 

        } 

        //计算水印位置 

        $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]); 

        //将图片与水印图片合成 

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

    } 

    /**

* Add text watermark

​​*/ 

    private function waterstr () 

    { 

        $rect = imagettfbbox($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(); 

    } 

    /**

* * Watermark image output

​​*/ 

    public function output () 

    { 

        $this->imginfo(); 

        if ($this -> waterType == 0) { 

            $this->waterstr(); 

        } else { 

            $this->waterimginfo(); 

            $this->waterimg(); 

        } 

        switch ($this -> srcImg_info[2]) { 

            case 3 : 

                imagepng($this -> im, $this -> srcImg); 

                break 1; 

            case 2 : 

                imagejpeg($this -> im, $this -> srcImg); 

                break 1; 

            case 1 : 

                imagegif($this -> im, $this -> srcImg); 

                break 1; 

            default : 

                    die('Failed to add watermark!');

break;

         } 

//Subsequent destruction processing after image synthesis

imagedestroy($this -> im);

imagedestroy($this -> water_im);

}  

}

Usage example:

//instantiate object

$obj = new WaterMask('img/10451.jpg');

//Type: 0 is text watermark, 1 is picture watermark

$obj->waterType = 0;

//Watermark transparency, the smaller the value, the higher the transparency

$obj->transparent = 15;

//Watermark text

//$obj->waterStr = 'Happy Birthday';

//Watermark image

//$obj->waterImg = '';//Watermark image

//Text font size

$obj->fontSize = 14;

//Watermark text color (RGB)

$obj->fontColor = array(255,255,100);

//Font file

$obj->fontFile = 'STCAIYUN.ttf';

//The output watermark image file overwrites the input image file

$obj->output();

The usage is relatively simple and very practical.

Author ltx851201

http://www.bkjia.com/PHPjc/478502.html

www.bkjia.com

true

http: //www.bkjia.com/PHPjc/478502.htmlTechArticleI had nothing to do in the afternoon, so I wrote a class for adding watermarks to images. This class implements adding text watermarks to images. , add image watermarks, and implement transparency functions for netizens to learn and...