php代码
/**
* 功能:生成缩略图
* 作者:phpox
* 日期:Thu May 17 09:57:05 CST 2007
*/
class CreatMiniature
{
//公共变量
var $srcFile=""; //原图
var $echoType; //输出图片类型,link--不保存为文件;file--保存为文件
var $im=""; //临时变量
var $srcW=""; //原图宽
var $srcH=""; //原图高
//设置变量及初始化
function SetVar($srcFile,$echoType)
{
if (!file_exists($srcFile)){
echo 源图片文件不存在!;
exit();
}
$this->srcFile=$srcFile;
$this->echoType=$echoType;
$info = "";
$data = GetImageSize($this->srcFile,$info);
switch ($data[2])
{
case 1:
if(!function_exists("imagecreatefromgif")){
echo "你的GD库不能使用GIF格式的图片,请使用Jpeg或PNG格式!返回";
exit();
}
$this->im = ImageCreateFromGIF($this->srcFile);
break;
case 2:
if(!function_exists("imagecreatefromjpeg")){
echo "你的GD库不能使用jpeg格式的图片,请使用其它格式的图片!返回";
exit();
}
$this->im = ImageCreateFromJpeg($this->srcFile);
break;
case 3:
$this->im = ImageCreateFromPNG($this->srcFile);
break;
}
$this->srcW=ImageSX($this->im);
$this->srcH=ImageSY($this->im);
}
//生成扭曲型缩图
function Distortion($toFile,$toW,$toH)
{
$cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$this->srcW,$this->srcH);
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
//生成按比例缩放的缩图
function PRorate($toFile,$toW,$toH)
{
$toWH=$toW/$toH;
$srcWH=$this->srcW/$this->srcH;
if($toWH
{
$ftoW=$toW;
$ftoH=$ftoW*($this->srcH/$this->srcW);
}
else
{
$ftoH=$toH;
$ftoW=$ftoH*($this->srcW/$this->srcH);
}
if($this->srcW>$toW||$this->srcH>$toH)
{
$cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
else
{
$cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$this->srcW,$this->srcH);
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
}
//生成最小裁剪后的缩图
function Cut($toFile,$toW,$toH)
{
$toWH=$toW/$toH;
$srcWH=$this->srcW/$this-&g

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