一个简单的图片水印的类

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代码:

<?php
/************************************************/
/*功能：添加图片水印 */
/*作者：还珠楼主 */
/*Email:[email protected] */
class digital
{
public $water_w,$water_h;//水印的宽，高
public $des_w,$des_h;//目标图片的宽高
public $pos_x,$pos_y;//落点坐标
public $water_url;//水印URL
public $des_url;//目标URL
public $water_info;//水印的基本信息
public $des_info;//目标图片信息
public $des,$water;
function __construct($des_url,$water_url="images/dig3.png")
{
$this->water=imagecreatefrompng($water_url);
$this->des=imagecreatefromjpeg($des_url);
$this->water_info=$this->getXY($water_url);
$this->des_info=$this->getXY($des_url);
$this->water_w=$this->water_info[0];
$this->water_h=$this->water_info[1];
$this->des_w=$this->des_info[0];
$this->des_h=$this->des_info[1];
$this->pos_x=5;
$this->pos_y=5;

}
function getXY($img)
{
return getimagesize($img);
}

function addDigital($br=true,$bl=false,$tl=false,$tr=false,$mid=false)
{
/***************bootom-right**********/
if($br)
{
$this->pos_x=$this->des_w-$this->water_w;
$this->pos_y=$this->des_h-$this->water_h;
imagecopymerge($this->des,$this->water,$this->pos_x,$this->pos_y,0,0,$this->water_w,$this->water_h,100);
}
/************bottom-left****************/
if($bl)
{
$this->pos_y=$this->des_h-$this->water_h;
imagecopymerge($this->des,$this->water,0,$this->pos_y,0,0,$this->water_w,$this->water_h,100);
}
/**************top-left******************/
if($tl)
{
imagecopymerge($this->des,$this->water,0,0,0,0,$this->water_w,$this->water_h,100);
}
/******************top-right************/
if($tr)
{
$this->pos_x=$this->des_w-$this->water_w;
imagecopymerge($this->des,$this->water,$this->pos_x,0,0,0,$this->water_w,$this->water_h,100);
}
/********************middle************/
if($mid)
{
$this->pos_x=($this->des_w-$this->water_w)/2;
$this->pos_y=($this->des_h-$this->water_h)/2;
imagecopymerge($this->des,$this->water,$this->pos_x,$this->pos_y,0,0,$this->water_w,$this->water_h,100);
}
imagejpeg($this->des);
header("Content-type: image/jpeg");

}

}
?>

复制内容到剪贴板

代码:

<?
include_once("function/digital_class.php");
$dig=new digital("images/2.jpg");
$dig->addDigital(true,false,false,false,false);
?>

引用:

原帖由 luzhou 于 2007-12-26 19:08 发表
应鼓励原创精品。

引用:

原帖由 luzhou 于 2007-12-26 19:08 发表
应鼓励原创精品。

引用:

原帖由 lomatus 于 2007-12-26 16:56 发表
顶。。。。
可以考虑加入算法在里面
imagecopymerge（）函数只是覆盖，破坏了原图片的完整，无法还原图片及提取水印信息
期待楼主做出更强大的数字水印类来供大家使用