PHP class to add a watermark to a picture

Support text watermark, image watermark support watermark location random or fixed (nine Gongge) Watermark Transparency settings (image watermark and text watermark are supported) text watermark font, color, size set picture watermark background Transparent /** * Add watermark class, support the text image watermark Transparency settings, watermark picture background transparent. * Date: 2011-09-27 * Author: www.itwhy.org Use * $obj = new Watermask ($imgFileName); Instantiating an Object * $obj $waterType = 1; Type: 0 for text watermark, 1 for picture watermark * $obj $transparent = 45; Watermark Transparency * $obj $waterStr = ' www.itwhy.org '; Watermark Text * $obj $fontSize = 16; Text font size * $obj $fontColor = array (255,0255); Watermark text color (RGB) * $obj $fontFile = = ' Ahgbold.ttf '; Font files * $obj->output (); Output watermark image file overlay into the input picture file */ Class watermask{ public $waterType = 1; Watermark Type: 0 for text watermark, 1 for picture watermark Public $pos = 0; Watermark Location Public $transparent = 45; Watermark Transparency Public $waterStr = ' www.itwhy.org '; Watermark Text public $fontSize = 16; Text font size Public $fontColor = Array (255,0,255); Watermark text color (RGB) Public $fontFile = ' Ahgbold.ttf '; Font files Public $waterImg = ' logo.png '; Watermark Picture Private $srcImg = '; Picture to add a watermark Private $im = '; Picture handle Private $water _im = "; Watermark Picture Handle Private $SRCIMG _info = "; Picture information Private $WATERIMG _info = "; Watermark Picture Information Private $str _w = "; Watermark Text Width Private $str _h = "; Watermark Text Height Private $x = '; Watermark X Coordinate Private $y = '; Watermark y-coordinate function __construct ($img) {//destructor $this->srcimg = file_exists ($img)? $img: Die (' ". $img. '" Source file does not exist!) '); } Private Function Imginfo () {//Get information about the picture that needs to be added to the watermark and load the picture. $this->srcimg_info = getimagesize ($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 (' Original picture ('. $this->srcimg. ') is not formatted, only PNG, JPEG, GIF are supported. '); } } Private Function Waterimginfo () {//Get the information of the watermark picture and load the picture. $this->waterimg_info = getimagesize ($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 (' Watermark picture ('. $this->srcimg. ') is not formatted, only PNG, JPEG, GIF are supported. '); } } Private Function Waterpos () {//Watermark position algorithm Switch ($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 = 0; $this->y = 0; Break 1; Case 2://Kaminaka $this->x = ($this->srcimg_info[0]-$this->waterimg_info[0])/2; $this->y = 0; Break 1; Case 3://upper Right $this->x = $this->srcimg_info[0]-$this->waterimg_info[0]; $this->y = 0; Break 1; Case 4://Middle Left $this->x = 0; $this->y = ($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]; $this->y = ($this->srcimg_info[1]-$this->waterimg_info[1])/2; Break 1; Case 7://Lower Left $this->x = 0; $this->y = $this->srcimg_info[1]-$this->waterimg_info[1]; Break 1; Case 8://Down $this->x = ($this->srcimg_info[0]-$this->waterimg_info[0])/2; $this->y = $this->srcimg_info[1]-$this->waterimg_info[1]; Break 1; Default://Down Right $this->x = $this->srcimg_info[0]-$this->waterimg_info[0]; $this->y = $this->srcimg_info[1]-$this->waterimg_info[1]; Break 1; } } Private Function waterimg () { if ($this->srcimg_info[0] <= $this->waterimg_info[0] | | $this->srcimg_info[1] <= $this->waterimg_ Info[1]) { Die (' The watermark is bigger than the original! '); } $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); } 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 (); } 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, $this->srcimg); Break 1; Default Die (' Add watermark failed! '); Break } Imagedestroy ($this->im); Imagedestroy ($this->water_im); } } ?> Copy Code

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