*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