http://www.dzhope.com/index.php zh-cn http://www.dzhope.com/post// jed <jed521@163.com> Thu, 12 Oct 2006 00:12:52 +0000 http://www.dzhope.com/post//
function ImageResize($srcFile,$toW,$toH,$toFile="")
{
  if($toFile==""){ $toFile = $srcFile; }
  $info = "";
  $data = GetImageSize($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();
     }
     $im = ImageCreateFromGIF($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();
     }
     $im = ImageCreateFromJpeg($srcFile);    
     break;
   case 3:
     $im = ImageCreateFromPNG($srcFile);    
     break;
 }
 $srcW=ImageSX($im);
 $srcH=ImageSY($im);
 $toWH=$toW/$toH;
 $srcWH=$srcW/$srcH;
 if($toWH<=$srcWH){
      $ftoW=$toW;
      $ftoH=$ftoW*($srcH/$srcW);
 }
 else{
     $ftoH=$toH;
     $ftoW=$ftoH*($srcW/$srcH);
 }    
 if($srcW>$toW||$srcH>$toH)
 {
    if(function_exists("imagecreatetruecolor")){
       @$ni = ImageCreateTrueColor($ftoW,$ftoH);
       if($ni) ImageCopyResampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);
       else{
        $ni=ImageCreate($ftoW,$ftoH);
         ImageCopyResized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);
       }
    }else{
       $ni=ImageCreate($ftoW,$ftoH);
       ImageCopyResized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH);
    }
    if(function_exists('imagejpeg')) ImageJpeg($ni,$toFile);
    else ImagePNG($ni,$toFile);
    ImageDestroy($ni);
 }
 ImageDestroy($im);
}





]]> http://www.dzhope.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.dzhope.com/post//#blogcomment