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 程式師世界 >> 編程語言 >> 網頁編程 >> PHP編程 >> PHP基礎知識 >> 智能的PHP縮圖類 詳細代碼

智能的PHP縮圖類 詳細代碼

編輯:PHP基礎知識
 

*類名:CreatMiniature
*功能:生成多種類型的縮略圖
*基本參數:$srcFile,$echoType
*方法用到的參數:
$toFile,生成的文件
$toW,生成的寬
$toH,生成的高
$bk1,背景顏色參數 以255為最高
$bk2,背景顏色參數
$bk3,背景顏色參數

*例子:


< ?php



/***************************************

*作者:落夢天蠍(beluckly)

*完成時間:2006-12-18

*類名:CreatMiniature

*功能:生成多種類型的縮略圖

*基本參數:$srcFile,$echoType

*方法用到的參數:

$toFile,生成的文件

$toW,生成的寬

$toH,生成的高

$bk1,背景顏色參數 以255為最高

$bk2,背景顏色參數

$bk3,背景顏色參數



*例子:



include("thumb.php");

$cm=new CreatMiniature();

$cm->SetVar("1.jpg","file");

$cm->Distortion("dis_bei.jpg",150,200);

$cm->Prorate("pro_bei.jpg",150,200);

$cm->Cut("cut_bei.jpg",150,200);

$cm->BackFill("fill_bei.jpg",150,200);



***************************************/



class CreatMiniature

{

//公共變量

var $srcFile=""; //原圖

var $echoType; //輸出圖片類型,link--不保存為文件;file--保存為文件

var $im=""; //臨時變量

var $srcW=""; //原圖寬

var $srcH=""; //原圖高



//設置變量及初始化

function SetVar($srcFile,$echoType)

{

$this->srcFile=$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!<a href='javascript:go(-1);'>返回</a>";

exit();

}

$this->im = ImageCreateFromGIF($this->srcFile);

break;

case 2:

if(!function_exists("imagecreatefromjpeg")){

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!<a href='javascript:go(-1);'>返回</a>";

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);

}



//生成按比例縮放的縮圖

function Prorate($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ftoW=$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);

}

}



//生成最小裁剪後的縮圖

function Cut($toFile,$toW,$toH)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ctoH=$toH;

$ctoW=$ctoH*($this->srcW/$this->srcH);

}

else

{

$ctoW=$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,$toH);

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

ImageDestroy($allImg);

}



//生成背景填充的縮圖

function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)

{

$toWH=$toW/$toH;

$srcWH=$this->srcW/$this->srcH;

if($toWH< =$srcWH)

{

$ftoW=$toW;

$ftoH=$ftoW*($this->srcH/$this->srcW);

}

else

{

$ftoH=$toH;

$ftoW=$ftoH*($this->srcW/$this->srcH);

}

if(function_exists("imagecreatetruecolor"))

{

@$cImg=ImageCreateTrueColor($toW,$toH);

if(!$cImg)

{

$cImg=ImageCreate($toW,$toH);

}

}

else

{

$cImg=ImageCreate($toW,$toH);

}

$backcolor = imagecolorallocate($cImg, $bk1, $bk2, $bk3); //填充的背景顏色

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< $toW)

{

ImageCopyMerge($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH,100);

}

else if($ftoH<$toH)

{

ImageCopyMerge($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);

}

*/

if($ftoW<$toW)

{

ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);

}

else if($ftoH<$toH)

{

ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);

}

else

{

ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);

}

}

else

{

ImageCopyMerge($cImg,$this->im,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);

}

return $this->EchoImage($cImg,$toFile);

ImageDestroy($cImg);

}





function CreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH)

{

if(function_exists("imagecreatetruecolor"))

{

@$creatImg = ImageCreateTrueColor($creatW,$creatH);

if($creatImg)

ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

else

{

$creatImg=ImageCreate($creatW,$creatH);

ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

}

}

else

{

$creatImg=ImageCreate($creatW,$creatH);

ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);

}

return $creatImg;

}



//輸出圖片,link---只輸出,不保存文件。file--保存為文件

function EchoImage($img,$to_File)

{

switch($this->echoType)

{

case "link":

if(function_exists('imagejpeg')) return ImageJpeg($img);

else return ImagePNG($img);

break;

case "file":

if(function_exists('imagejpeg')) return ImageJpeg($img,$to_File);

else return ImagePNG($img,$to_File);

break;

}

}



}

?>

 

 
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