Discuz论坛教程之让水印平铺的修改方法

Discuz论坛教程之让水印平铺的修改方法是什么，很多人都感叹自己辛苦做的图片被别人拷贝过去，怎么能不心伤，有什么办法可以杜绝图片的流失，维护版权呢，今天我们就来看看Discuz论坛处理的图片的方法吧！

修改文件：/source/class/class_image.php

修改原理：计算水印大小和图片大小，每次偏移一个水印的位置重复打水印；

由于discuz支持png和gif两种水印，因此本方法涉及两处修改:
修改1属于支持png水印，修改2属于支持gif水印；

修改1：大概第475行原始代码

if($this->param['watermarktype'][$type] == 'png') {  

imageCopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h);  

}

修改为

if($this->param['watermarktype'][$type] == 'png') {  

//修改1 开始  

//imageCopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h);  

if(intval($this->imginfo['width']/$logo_w)>=3){  

$wblank=($logo_w+$this->imginfo['width']%$logo_w)/intval($this->imginfo['width']/$logo_w);  

$hblank=($logo_h+$this->imginfo['height']%$logo_h)/intval($this->imginfo['height']/$logo_h);  

for($x = $wblank;$x+$logo_w<=$this->imginfo['width'];$x=$x+$logo_w+$wblank){  

for($y = $hblank;$y+$logo_h<=$this->imginfo['height'];$y=$y+$logo_h+$hblank){  

imageCopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h);  

}  

}     

}else{  

for($x = 5;$x+$logo_w<=$this->imginfo['width'];$x=$x+$logo_w+10){  

for($y = 5;$y+$logo_h<=$this->imginfo['height'];$y=$y+$logo_h+10){  

imageCopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h);  

}  

}  

}     

//修改1 结束  

}

修改2：大概500行，原始代码为：

else {  

imageAlphaBlending($watermark_logo, true);                

imageCopyMerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h, $this->param['watermarktrans'][$type]);  

}

修改为：

else {  

imageAlphaBlending($watermark_logo, true);  

//修改2 开始  

if(intval($this->imginfo['width']/$logo_w)>=3){  

$wblank=($logo_w+$this->imginfo['width']%$logo_w)/intval($this->imginfo['width']/$logo_w);  

$hblank=($logo_h+$this->imginfo['height']%$logo_h)/intval($this->imginfo['height']/$logo_h);  

for($x = $wblank;$x+$logo_w<=$this->imginfo['width'];$x=$x+$logo_w+$wblank){  

for($y = $hblank;$y+$logo_h<=$this->imginfo['height'];$y=$y+$logo_h+$hblank){  

imageCopyMerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h, $this->param['watermarktrans'][$type]);  

}  

}     

}else{  

for($x = 5;$x+$logo_w<=$this->imginfo['width'];$x=$x+$logo_w+10){  

for($y = 5;$y+$logo_h<=$this->imginfo['height'];$y=$y+$logo_h+10){  

imageCopyMerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h, $this->param['watermarktrans'][$type]);  

}  

}  

}                     

//imageCopyMerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logo_w, $logo_h, $this->param['watermarktrans'][$type]);  

//修改2 结束  

}        

修改后的水印平铺效果