php產生縮圖 php產生縮圖的類別程式碼

/**
* 功能:產生縮圖
* 作者:phpox
* 日期:Thu May 17 09:57:05 CST 2007
*/
class CreatMiniature
{
//公共變數
var $srcFile=""; //原圖
var $echoType ; //輸出圖片類型，link--不儲存為檔案；file--儲存為檔案
var $im=""; //臨時變數
var $srcW=""; //原圖寬
var $srcH=""; //原圖高
//設定變數及初始化
function SetVar($srcFile,$echoType)
{
if (!file_exists($srcFile )){
echo '來源圖片檔案不存在!';
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庫不能使用GIF格式的圖片，請使用Jpeg或PNG格式！返回";
exit ();
}
$this->im = ImageCreateFromGIF($this->srcFile);
break;
case 2:
if(!function_exists("imagecreatefromjpegagecreatefromjpeg")){
echo "你的GD庫不能使用jpeg格式的圖片，請使用其它格式的圖片！回傳";
exit();
}
$this->im = ImageCreateFromJpeg($this->srcFile);
break;
情況3：
$this->im = ImageCreateFromPNG($this->srcFile)
break;
$this->srcW=ImageSX($this-> ;im); =ImageSY($this->im) ;
}
//產生變形模型縮圖
function Distortion($toFile,$toW, $toH)
{
$cImg=$ this->CreatImage($this-> im,$toW,$toH​​,0,0,0,0,$this->srcW,$this ->srcH);
return $this->EchoImage( $cImg,$toFile);
ImageDestroy($cImg);
}
//產生按比例縮放的縮小圖
函數按比例分配($toFile,$toW,$toH​​ )
{
$toWH=$toW/$toH;
$srcWH=$toWH=$toW/$toH;
$srcWH=$this->srcW/$this->srcH;
if($toWH {
$ ftoW=$toW;
$ftoH=$ftoW*($this->srcH/$this->srcW);
}
其他
{
$ftoH =$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);
返回$this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
其他
{
$cImg=$this- >CreatImage($this ->im,$this->srcW,$this->srcH,0,0, 0,0,$this->srcW,$this->srcH);
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
}
//產生最小縮小後的縮圖
function Cut($toFile,$toW,$toH​​.)
{
$toWH=$ toW/ $到H;
$srcWH=$this->srcW/$this->srcH;
if($toWH{
$ctoH=$toH;
$ctoW=$ctoH*($this->srcW/$this->srcH);
}
其他
{
$ctoW=$toW;
$ctoH=$ctoW*($this->srcH/$this->srcW);
}
$allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0,0,0,0,$this->srcW,$this->srcH);
$cImg=$this->CreatImage($allImg,$toW,$toH​​,0,0,($ctoW-$toW)/2,($ctoH-$toH)/2,$ toW, $到H）;
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
ImageDestroy($allImg);
//產生背景填充的縮圖
function BackFill($toFile,$toW,$toH​​,$bk1=255,$bk2=255,$bk3=255)
{
$toWH=$toW/ $toH;
$srcWH=$this->srcW/$this->srcH;
if($toWH{
$ftoW=$toW
$; ftoH=$ftoW*($this->srcH/$this->srcW)
}
其他
{
$ftoH=$toH;
$ftoW=$ftoH*( $ this->srcW/$this->srcH);
}
if(function_exists("imagecreatetruecolor"))
{
@$cImg=ImageCreateTrueColor($toW,$toW,$toW,$to ) ;
if(!$cImg)
{
$cImg=ImageCreate($toW,$toH​​🎜>$cImg=ImageCreate($toW,$toH​​🎜>{🎜>}
}
其他
{🎜>}
}
其他
{
$cImg=ImageCreate($toW,$toH​​);
}
$backcolor = imagecolorallocate($cImg, $bk1, $bk2, $bk3); // 填滿背景顏色
ImageFilledRectangle( $cImg,0,0,$toW,$toH​​,$backcolor)
if($this->srcW>$toW||$this->srcH>$toH)
{
$proImg=$this->CreatImage($this->im, $ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);
if($ftoW{
ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);
}
else if($ftoH{
ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW, $ftoH);
}
其他
{
ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);
}
}
其他
{
ImageCopyMerge($cImg,$this->im,($toW-$ftoW)/2,($toH-$ftoH)/2 , 0,0,$ftoW,$ftoH,100);
}
return $this->EchoImage($cImg,$toFile);
ImageDestroy($cImg);
}
函數CreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH)
{
if(function_exists(true" ) ) "))
{
@$creatImg = ImageCreateTrueColor($creatW,$creatH);
if($creatImg)
ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
其他
{
$creatImg=ImageCreate($creatW,$creatH);
ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
}
}
其他
{
$creatImg=ImageCreate($creatW,$creatH);
ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
}
回傳 $creatImg;
}
//輸出圖片，連結---只輸出，不儲存檔案。 $this->echoType)
{
case "link":
if(function_exists('imagejpeg')) return ImageJpeg($img);
否則回傳ImagePNG($img);
休息；
case "file":
if(function_exists('imagejpeg')) return ImageJpeg($img,$to_File);
否則回傳ImagePNG($img,$to_File);
休息；
}
}
}
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