class Image{
protected $ori;//要处理的图
protected $width = 200;//缩略图宽
protected $height = 200;//缩略图高
protected $logo = 'D:\www\dl\upload\2014\1008\thumb\thumb_4j9c.jpg';//水印路径
protected $position = 3;//默认水印位置
protected $fac = 30;//默认的透明度
//函数地图
public $fucmap = array(
1=>'imagecreatefromgif',
2=>'imagecreatefromjpeg',
3=>'imagecreatefrompng' ,
6=>'imagecreatefromwbmp',
);
//构造的时候需要传一个原图的路径
public function __construct($ori){
$this->ori = $ori;
}
/*缩略图*/
public function makeThumb(){
list($ow,$oh,$otype) = getimagesize($this->ori);
//原图
$big = $this->fucmap[$otype]($this->ori);
//小图
$smal = imagecreatetruecolor($this->width, $this->height);
$white = imagecolorallocate($smal,255,255,255);
imagefill($smal, 0, 0,$white);
//计算比例
$bl = min($this->width/$ow,$this->height/$oh);
$hw = $ow*$bl;
$hh = $oh*$bl;
//比例拷贝
imagecopyresampled($smal, $big, ($this->width - $hw)/2, ($this->height-$hh)/2, 0, 0, $hw, $hh , $ow, $oh);
$path = dirname($this->ori).'/thumb/thumb_'.basename($this->ori);
imagepng($smal,$path);
return $path;
}
/*水印没有存到硬盘上直接打印的.....*/
public function waterMark($position){
$this ->position = $position;
if($this->position>4){
echo '你的位置不大对呀！';
return false;
}else{
list($ow,$oh,$otype)=getimagesize($this->ori);
list($ww,$wh,$wtype)=getimagesize($this->logo);
$big = $this->fucmap[$otype]($this->ori);
$smal =$this->fucmap[$wtype]($this->logo);
switch ($this->position) {
case 0:
imagecopymerge($big, $smal, 0, 0, 0, 0, $ww, $wh,$this->fac);
break;
case 1:
imagecopymerge($big, $smal, ($ow-$ww), 0, 0, 0, $ww, $wh,$this->fac);
break;
case 2:
imagecopymerge($big, $smal, 0, ($oh-$wh), 0, 0, $ww, $wh,$this->fac);
break;
case 3:
imagecopymerge($big, $smal, ($ow-$ww), ($oh-$wh), 0, 0, $ww, $wh,$this->fac);
break;
case 4:
imagecopymerge($big, $smal, ($ow-$ww)/2, ($oh-$wh)/2, 0, 0, $ww, $wh,$this->fac);
break;
}
header('content-type:image/png');
imagepng($big);
}
}
}
/*$img = new Image('D:\www\dl\upload\2014\1008\4j9c.jpg');
echo $img->waterMark(5);
*/
