A super powerful picture watermark Class _php Tutorial

Afternoon nothing dry, wrote a picture and watermark processing class, this class to achieve a picture with text watermark, add picture watermark, and achieve the function of transparency, for you to learn and exchange

/**

* Add watermark class, support text, picture watermark and the setting of transparency, watermark picture background transparent.

* @author LITX date:2011-12-05 3 o'clock in the afternoon in the fast-seeding research and development center of Kelon

*/

Class Watermask

{

/**

* Watermark Type

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

*/

Private $waterType = 1;

/**

* Watermark Location Type

* @var int $pos default to 9 (lower right)

*/

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 personal folio)

*/

Private $waterStr = ' personal folio ';

/**

* 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 ';

/**

* Need to add a watermark picture

* @var String $SRCIMG

*/

Private $srcImg = ';

/**

* Picture handle

* @var String $im

*/

Private $im = ';

/**

* Watermark Picture Handle

* @var string $water _im

*/

Private $water _im = ";

/**

* Picture Information

* @var Array $srcImg _info

*/

Private $SRCIMG _info = ";

/**

* Watermark Picture 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 coordinate

* @var int $x

*/

Private $x = ';

/**

* Watermark Y coordinate

* @var int $y

*/

Private $y = ';

/**

* constructor to initialize the source image by passing in a source image that needs to be watermarked

* @param string $img The source image to be watermarked

*/

Public function __construct ($img)

{

if (file_exists ($img)) {//source file exists

$this-srcimg = $img;

}else{//source file does not exist

echo ' source file '. $img. ' does not exist, please check to see if the file path is correct ';

Exit ();

}

}

/**

* Get information about images you need to add watermarks to and load images

*/

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 '. Srcimg, $this. ' The format is not correct, currently this function only supports PNG, JPEG, GIF image watermark function ';

Exit ();

}

}

/**

* Get information about the watermark image and load it into pictures

*/

Private Function Waterimginfo ()

{

$this-Waterimg_info = getimagesize ($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:

echo ' source picture file '. Srcimg, $this. ' The format is not correct, currently this function only supports PNG, JPEG, GIF image watermark function ';

Exit ();

}

}

/**

* Watermark Location 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://Kaminaka

$this x = ($this srcimg_info[0]-$this-waterimg_info[0])/2;

$this, y = 20;

Break 1;

Case 3://upper Right

$this x = $this, srcimg_info[0]-$this-waterimg_info[0];

$this, y = 20;

Break 1;

Case 4://Middle Left

$this x = 20;

$this y = ($this, srcimg_info[1]-$this-waterimg_info[1])/2;

Break 1;

Case 5://Middle

$this x = ($this srcimg_info[0]-$this-waterimg_info[0])/2;

$this y = ($this, srcimg_info[1]-$this-waterimg_info[1])/2;

Break 1;

Case 6://Middle Right

$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://Lower Left

$this x = 20;

$this y = $this, srcimg_info[1]-$this-waterimg_info[1]-20;

Break 1;

Case 8://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://Lower Right

$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://Down Right

$this x = $this, srcimg_info[0]-$this-waterimg_info[0]-20;

$this y = $this, srcimg_info[1]-$this-waterimg_info[1]-20;

Break 1;

}

}

/**

* Plus picture watermark

*/

Private Function Waterimg ()

{

if ($this, srcimg_info[0] <= $this, waterimg_info[0] | | $this, srcimg_info[1] <= $this waterimg _info[1]) {

echo ' picture size is too small to add watermarks, please upload a large picture ';

Exit ();

}

Calculate Watermark Location

$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 = transparent, $this;

Imagecopy ($cut, $this-water_im, 0, 0, 0, 0, $this-waterimg_info[0],

$this, waterimg_info[1]);

Compositing a picture with a watermark picture

Imagecopymerge ($this im, $cut, $this, X, $this-y, 0, 0, $this-waterimg_info[0], $this-Waterim G_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 = FontSize, $this;

$this-Water_im = Imagecreatetruecolor ($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 (' Add watermark failed! ');

Break

}

Post-image-synthesis destruction processing

Imagedestroy ($this, IM);

Imagedestroy ($this-Water_im);

}

}

Examples of Use methods:

Instantiating an Object

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

Type: 0 for text watermark, 1 for picture watermark

$obj->watertype = 0;

Watermark transparency, the smaller the value, the greater the transparency

$obj->transparent = 15;

Watermark Text

$obj->waterstr = ' Happy Birthday ';

Watermark Picture

$obj->waterimg = ";//Watermark Picture

Text font size

$obj->fontsize = 14;

Watermark text color (RGB)

$obj->fontcolor = Array (255,255,100);

Font files

$obj->fontfile = ' Stcaiyun.ttf ';

Output watermark image file overlay into the input picture file

$obj->output ();

The use of the method is relatively simple, but also very practical.

Author ltx851201

http://www.bkjia.com/PHPjc/478502.html www.bkjia.com true http://www.bkjia.com/PHPjc/478502.html techarticle afternoon nothing to do, wrote a picture and watermark processing class, this class to achieve a picture with text watermark, add picture watermark, and achieve the function of transparency, for you to learn and ...

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