重复铺满水印

最新推荐文章于 2024-09-07 14:32:49 发布

转载最新推荐文章于 2024-09-07 14:32:49 发布 · 216 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/jphper/blog/1501475

文章标签：

#php #人工智能

本文介绍了一个使用PHP实现的图片水印类，该类能够为图片添加水印，支持PNG、JPEG和GIF格式的图片及水印，并且可以调整水印的位置和透明度。

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<?php
/*
$tmp="tmp/a.jpg";
$obj = new WaterMask($tmp); 
$obj->waterImg = 'sy_logo.png';
$obj->transparent = 50;
$obj->output();
*/
class WaterMask{
 
    public  $pos                = 0;                //水印位置
    public  $transparent        = 45;               //水印透明度
    public  $waterImg           = '';       //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 

 
    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 waterimg() {
        if ($this->srcImg_info[0] <= $this->waterImg_info[0] || $this->srcImg_info[1] <= $this->waterImg_info[1]){
            die('水印比原图大！');
        }
		
        $cut = imagecreatetruecolor($this->waterImg_info[0],$this->waterImg_info[1]);
		$total=($this->srcImg_info[0]/$this->waterImg_info[0])*($this->srcImg_info[1]/$this->waterImg_info[1]);//重复次数
		$x=10;$y=10;
		for($i=0;$i<=$total;$i++){
			if($y>$this->srcImg_info[1]){
				$y=10;
				$x+=$this->waterImg_info[0]+150;
			}
			imagecopy($cut,$this->im,0,0,$x,$y,$this->waterImg_info[0],$this->waterImg_info[1]);
			imagecopy($cut,$this->water_im,0,0,0,0,$this->waterImg_info[0],$this->waterImg_info[1]);
			imagecopymerge($this->im,$cut,$x,$y,0,0,$this->waterImg_info[0],$this->waterImg_info[1],$this->transparent);
			$y+=150;
		}
    }
 
    function output() {
        $this->imginfo();
		$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,$this->srcImg);
                break 1;
            default:
                die('添加水印失败！');
                break;
        }
        imagedestroy($this->im);
        imagedestroy($this->water_im);
    }
}
?>

转载于:https://my.oschina.net/jphper/blog/1501475