*作者：落梦天蝎（beluckly）
*完成时间：2006-12-18
*类名：CreatMiniature
*功能：生成多种类型的缩略图
*基本参数：$srcFile,$echoType
*方法用到的参数：
$toFile,生成的文件
$toW,生成的宽
$toH,生成的高
$bk1,背景颜色参数 以255为最高
$bk2,背景颜色参数
$bk3,背景颜色参数
*例子：
| < ?php |
| /*************************************** |
| *作者：落梦天蝎（beluckly） |
| *完成时间：2006-12-18 |
| *类名：CreatMiniature |
| *功能：生成多种类型的缩略图 |
| *基本参数：$srcFile,$echoType |
| *方法用到的参数： |
| $toFile,生成的文件 |
| $toW,生成的宽 |
| $toH,生成的高 |
| $bk1,背景颜色参数 以255为最高 |
| $bk2,背景颜色参数 |
| $bk3,背景颜色参数 |
| *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) |
| { |
| $this->srcFile=$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！<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库不能使用jpeg格式的图片，请使用其它格式的图片！<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< =$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); |
| } |
| } |
| //生成最小裁剪后的缩图 |
| 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($allImg); |
| } |
| //生成背景填充的缩图 |
| function BackFill($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, $bk3); //填充的背景颜色 |
| ImageFilledRectangle($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 $creatImg; |
| } |
| //输出图片，link---只输出，不保存文件。file--保存为文件 |
| function EchoImage($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; |
| } |
| } |
| } |
| ?> |
很棒的一个类，谢了