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php教程-PHP源码
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$waterType = 1; //类型：0为文字水印、1为图片水印 *$obj->$transparent = 45; //水印透明度 *$obj->$waterStr = \; //水印文字 *$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 */ class WaterMask{public $waterType= 0; //水印类型：0为文字水印、1为图片水印public $pos= 0; //水印位置public $transparent = 45; //水印透明度 public $waterStr = \; //水印文字public $fontSize = 18; //文字字体大小public $fontColor= array(255,255,255); //水印文字颜色（RGB）public $fontFile = AHGBold.ttf; //字体文件 public $waterImg = logo.jpg;//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 $y = \; //水印y坐标 function __construct($img) { //析构函数 $this->srcImg = file_exists($img) ? $img : die(\".$img.\" 源文件不存在！);} 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。); }} 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（.$this->srcImg.）格式不对，只支持PNG、JPEG、GIF。); }}private function waterpos() { //水印位置算法 switch ($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; 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; }} private function waterimg() { if ($this->srcImg_info[0] waterImg_info[0] || $this->srcImg_info[1] waterImg_info[1]){ die(注意:水印比原图大！); } $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(添加水印失败哦！); break; } imagedestroy($this->im); imagedestroy($this->water_im);} } ?>
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