一个超级强大的图片加水印的类
Jun 13, 2016 am 10:46 AM
下午没事干,就写了个图片加水印处理的类,本类实现了给图片加文字水印,加图片水印,并且实现了透明度的功能,以供各位网友学习和交流
/**
* 加水印类,支持文字、图片水印以及对透明度的设置、水印图片背景透明。
* @author litx date:2011-12-05下午3点于迈科龙快播研发中心
*/
class WaterMask
{
/**
* 水印类型
* @var int $waterType 0为文字水印 ;1为图片水印
*/
private $waterType = 1;
/**
* 水印位置 类型
* @var int $pos 默认为9(右下角)
*/
private $pos = 9;
/**
* 水印透明度
* @var int $transparent 水印透明度(值越小越透明)
*/
private $transparent = 20;
/**
* 如果是文字水印,则需要加的水印文字
* @var string $waterStr 默认值 (李铁雄个人作品集)
*/
private $waterStr = '个人作品集';
/**
* 文字字体大小
* @var int $fontSize 字体大小
*/
private $fontSize = 14;
/**
* 水印文字颜色(RGB)
* @var array $fontColor 水印文字颜色(RGB)
*/
private $fontColor = array ( 255, 255, 255 );
/**
* 字体文件
* @var unknown_type
*/
private $fontFile = 'AHGBold.ttf';
/**
* 水印图片
* @var string $waterImg
*/
private $waterImg = 'logo.png';
/**
* 需要添加水印的图片
* @var string $srcImg
*/
private $srcImg = '';
/**
* 图片句柄
* @var string $im
*/
private $im = '';
/**
* 水印图片句柄
* @var string $water_im
*/
private $water_im = '';
/**
* 图片信息
* @var array $srcImg_info
*/
private $srcImg_info = '';
/**
* 水印图片信息
* @var array $waterImg_info
*/
private $waterImg_info = '';
/**
* 水印文字宽度
* @var int $str_w
*/
private $str_w = '';
/**
* 水印文字高度
* @var int $str_h
*/
private $str_h = '';
/**
* 水印X坐标
* @var int $x
*/
private $x = '';
/**
* 水印y坐标
* @var int $y
*/
private $y = '';
/**
* 构造函数,通过传入需要加水印的源图片初始化源图片
* @param string $img 需要加水印的源图片
*/
public function __construct ($img)
{
if(file_exists($img)){//源文件存在
$this -> srcImg = $img ;
}else{//源文件不存在
echo '源文件'.$img.'不存在,请检查看文件路径是否正确';
exit();
}
}
/**
* 获取需要添加水印的图片的信息,并载入图片
*/
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 '源图片文件'. $this -> srcImg .'格式不正确,目前本函数只支持PNG、JPEG、GIF图片水印功能';
exit();
}
}
/**
* 获取水印图片的信息,并载入图片
*/
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 '源图片文件'. $this -> srcImg .'格式不正确,目前本函数只支持PNG、JPEG、GIF图片水印功能';
exit();
}
}
/**
* 水印位置算法
*/
private function waterpos ()
{
switch ($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 = 20;
$this -> y = 20;
break 1;
case 2 : //上中
$this -> x = ($this -> srcImg_info[0] - $this -> waterImg_info[0]) / 2;
$this -> y = 20;
break 1;
case 3 : //上右
$this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0];
$this -> y = 20;
break 1;
case 4 : //中左
$this -> x = 20;
$this -> y = ($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] - 20;
$this -> y = ($this -> srcImg_info[1] - $this -> waterImg_info[1]) / 2;
break 1;
case 7 : //下左
$this -> x = 20;
$this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20;
break 1;
case 8 : //下中 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 : //下右
$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 : //下右
$this -> x = $this -> srcImg_info[0] - $this -> waterImg_info[0] - 20;
$this -> y = $this -> srcImg_info[1] - $this -> waterImg_info[1] - 20;
break 1;
}
}
/**
* 加图片水印
*/
private function waterimg ()
{
if ($this -> srcImg_info[0] waterImg_info[0] || $this -> srcImg_info[1] waterImg_info[1]) {
echo '图片尺寸太小,无法加水印,请上传一张大图片';
exit();
}
//计算水印位置
$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],
$this -> waterImg_info[1]);
//将图片与水印图片合成
imagecopymerge($this -> im, $cut, $this -> x, $this -> y, 0, 0, $this -> waterImg_info[0], $this -> waterImg_info[1], $pct);
}
/**
* 加文字水印
*/
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();
}
/**
* 水印图片输出
*/
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, $this -> srcImg);
break 1;
default :
die('添加水印失败!');
break;
}
//图片合成后的后续销毁处理
imagedestroy($this -> im);
imagedestroy($this -> water_im);
}
}
使用方法示例:
//实例化对象
$obj = new WaterMask('img/10451.jpg');
//类型:0为文字水印、1为图片水印
$obj->waterType = 0;
//水印透明度,值 越小透明度越高
$obj->transparent = 15;
//水印文字
//$obj->waterStr = '生日快乐';
//水印图片
//$obj->waterImg = '';//水印图片
//文字字体大小
$obj->fontSize = 14;
//水印文字颜色(RGB)
$obj->fontColor = array(255,255,100);
//字体文件
$obj->fontFile = 'STCAIYUN.ttf';
//输出水印图片文件覆盖到输入的图片文件
$obj->output();
使用方式比较简单,也很实用。
作者 ltx851201

Hot Article

Hot tools Tags

Hot Article

Hot Article Tags

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

How to solve the problem of automatically saving pictures when publishing on Xiaohongshu? Where is the automatically saved image when posting?

How to add watermark to Meitu Xiuxiu? Share how to add watermark to beautiful photos!

How to set photo watermark on Xiaomi Mi 14?

How to post pictures in TikTok comments? Where is the entrance to the pictures in the comment area?

The operation process of WIN10 service host occupying too much CPU

How to make ppt pictures appear one by one

Introduction to the method of editing watermark with WPS

How to remove the evaluation copy watermark in the lower right corner of win11 24H2? Tips for removing the evaluation copy in the lower right corner of win11
