<?php
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/***************************************
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*類名：CreatMiniature
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*功能：生成多種類型的縮略圖
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*基本參數：$srcFile,$echoType
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*方法用到的參數：
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$toFile,生成的文件
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$toW,生成的寬
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$toH,生成的高
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$bk1,背景顔色參數 以255爲最高
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$bk2,背景顔色參數
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$bk3,背景顔色參數
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*例子：
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include("thumb.php");
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$cm=new CreatMiniature();
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$cm->SetVar("1.jpg","file");
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$cm->Distortion("dis_bei.jpg",150,200);
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$cm->Prorate("pro_bei.jpg",150,200);
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$cm->Cut("cut_bei.jpg",150,200);
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$cm->BackFill("fill_bei.jpg",150,200);
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***************************************/
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class CreatMiniature
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{
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//公共變量
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var $srcFile=""; //原圖
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var $echoType; //輸出圖片類型，link–不保存爲文件；file–保存爲文件
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var $im=""; //臨時變量
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var $srcW=""; //原圖寬
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var $srcH=""; //原圖高
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//設置變量及初始化
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function SetVar($srcFile,$echoType)
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{
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$this->srcFile=$srcFile;
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$this->echoType=$echoType;
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$info = "";
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$data = GetImageSize($this->srcFile,$info);
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switch ($data[2])
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{
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case 1:
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if(!function_exists("imagecreatefromgif")){
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/* echo "妳的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>";*/
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exit();
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}
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$this->im = ImageCreateFromGIF($this->srcFile);
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break;
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case 2:
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if(!function_exists("imagecreatefromjpeg")){
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/* echo "妳的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>";*/
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exit();
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}
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$this->im = ImageCreateFromJpeg($this->srcFile);
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break;
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case 3:
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$this->im = ImageCreateFromPNG($this->srcFile);
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break;
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}
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$this->srcW=ImageSX($this->im);
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$this->srcH=ImageSY($this->im);
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}
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//生成扭曲型縮圖
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function Distortion($toFile,$toW,$toH)
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{
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$cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$this->srcW,$this->srcH);
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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}
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//生成按比例縮放的縮圖
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function Prorate($toFile,$toW,$toH)
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{
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$toWH=$toW/$toH;
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$srcWH=$this->srcW/$this->srcH;
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if($toWH <= $srcWH)
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{
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$ftoW=$toW;
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$ftoH=$ftoW*($this->srcH/$this->srcW);
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}
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else
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{
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$ftoH=$toH;
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$ftoW=$ftoH*($this->srcW/$this->srcH);
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}
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if($this->srcW>$toW||$this->srcH>$toH)
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{
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$cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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}
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else
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{
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$cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$this->srcW,$this->srcH);
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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}
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}
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//生成最小裁剪後的縮圖
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function Cut($toFile,$toW,$toH)
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{
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$toWH=$toW/$toH;
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$srcWH=$this->srcW/$this->srcH;
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if($toWH <= $srcWH)
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{
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$ctoH=$toH;
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$ctoW=$ctoH*($this->srcW/$this->srcH);
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}
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else
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{
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$ctoW=$toW;
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$ctoH=$ctoW*($this->srcH/$this->srcW);
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}
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$allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0,0,0,0,$this->srcW,$this->srcH);
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$cImg=$this->CreatImage($allImg,$toW,$toH,0,0,($ctoW-$toW)/2,($ctoH-$toH)/2,$toW,$toH);
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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ImageDestroy($allImg);
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}
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function BackFill1($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)
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{
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if($this->srcW > $toW)
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{
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$scaleW= $toW / $this->srcW;
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$tooH=$this->srcH*$scaleW;
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$this->BackFill($toFile,$toW,$tooH,$bk1=255,$bk2=255,$bk3=255);
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}
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else
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{
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$this->BackFill($toFile,$this->srcW,$this->srcH,$bk1=255,$bk2=255,$bk3=255);
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}
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}
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//生成背景填充的縮圖
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function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)
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{
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$toWH=$toW/$toH;
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$srcWH=$this->srcW/$this->srcH;
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if($toWH <= $srcWH)
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{
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$ftoW=$toW;
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$ftoH=$ftoW*($this->srcH/$this->srcW);
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}
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else
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{
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$ftoH=$toH;
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$ftoW=$ftoH*($this->srcW/$this->srcH);
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}
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if(function_exists("imagecreatetruecolor"))
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{
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@$cImg=ImageCreateTrueColor($toW,$toH);
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if(!$cImg)
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{
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$cImg=ImageCreate($toW,$toH);
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}
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}
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else
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{
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$cImg=ImageCreate($toW,$toH);
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}
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$backcolor = imagecolorallocate($cImg, $bk1, $bk2, $bk3); //填充的背景顔色
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ImageFilledRectangle($cImg,0,0,$toW,$toH,$backcolor);
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if($this->srcW>$toW||$this->srcH>$toH)
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{
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$proImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);
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//if($ftoW< $toW)
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//{
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// ImageCopyMerge($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH,100);
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//}
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//else if($ftoH<$toH)
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//{
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// ImageCopyMerge($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);
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//}
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if($ftoW <$toW && $ftoH<$toH)
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{
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ImageCopy($cImg,$proImg,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);
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}
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else
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{
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if($ftoW<$toW)
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{
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ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);
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}
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else if($ftoH<$toH)
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{
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ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);
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}
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else
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{
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ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);
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}
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}
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}
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else
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{
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ImageCopyMerge($cImg,$this->im,($toW-$this->srcW)/2,($toH-$this->srcH)/2,0,0,$this->srcW,$this->srcH,100);
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}
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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}
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function BackFill_auto($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)
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{
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if($this->srcW<$this->srcH)
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{
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if($this->srcH>$toH)
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{
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$toBili=$toH/$this->srcH;
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$toFW=$toBili*$this->srcW;
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$toFH=$toH;
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}
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else
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{
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if($this->srcW>$toW)
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{
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$toBili=$toW/$this->srcW;
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$toFW=$toW;
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$toFH=$toBili*$this->srcH;
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}
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else
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{
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$toFH=$this->srcH;
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$toFW=$this->srcW;
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}
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}
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}
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else
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{
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if($this->srcW>$toW)
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{
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$toBili=$toW/$this->srcW;
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$toFH=$toBili*$this->srcH;
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$toFW=$toW;
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}
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else
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{
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if($this->srcH>$toH)
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{
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$toBili=$toH/$this->srcH;
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$toFH=$toH;
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$toFW=$toBili*$this->srcW;
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}
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else
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{
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$toFH=$this->srcH;
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$toFW=$this->srcW;
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}
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}
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}
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/*$toWH=$toW/$toH;
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$srcWH=$this->srcW/$this->srcH;
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if($toWH <= $srcWH)
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{
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$ftoW=$toW;
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$ftoH=$ftoW*($this->srcH/$this->srcW);
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}
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else
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{
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$ftoH=$toH;
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$ftoW=$ftoH*($this->srcW/$this->srcH);
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}*/
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if(function_exists("imagecreatetruecolor"))
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{
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@$cImg=ImageCreateTrueColor($toFW,$toFH);
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if(!$cImg)
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{
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$cImg=ImageCreate($toFW,$toFH);
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}
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}
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else
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{
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$cImg=ImageCreate($toFW,$toFH);
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}
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$backcolor = imagecolorallocate($cImg, $bk1, $bk2, $bk3); //填充的背景顔色
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ImageFilledRectangle($cImg,0,0,$toFW,$toFH,$backcolor);
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if($this->srcW>$toFW||$this->srcH>$toFH)
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{
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$proImg=$this->CreatImage($this->im,$toFW,$toFH,0,0,0,0,$this->srcW,$this->srcH);
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ImageCopyMerge($cImg,$proImg,0,0,0,0,$toFW,$toFH,100);
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/*
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if($ftoW< $toW)
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{
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ImageCopyMerge($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH,100);
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}
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else if($ftoH<$toH)
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{
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ImageCopyMerge($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);
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}
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*/
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/* if($ftoW <$toW && $ftoH<$toH)
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{
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ImageCopy($cImg,$proImg,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);
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}
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else
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{
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if($ftoW<$toW)
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{
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ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);
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}
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else if($ftoH<$toH)
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{
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ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);
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}
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else
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{
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ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);
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}
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}*/
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}
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else
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{
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ImageCopyMerge($cImg,$this->im,($toFW-$this->srcW)/2,($toFH-$this->srcH)/2,0,0,$this->srcW,$this->srcH,100);
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}
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return $this->EchoImage($cImg,$toFile);
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ImageDestroy($cImg);
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}
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function CreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH)
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{
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if(function_exists("imagecreatetruecolor"))
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{
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@$creatImg = ImageCreateTrueColor($creatW,$creatH);
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if($creatImg)
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ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
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else
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{
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$creatImg=ImageCreate($creatW,$creatH);
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//ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
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ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
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}
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}
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else
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{
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$creatImg=ImageCreate($creatW,$creatH);
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//ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
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ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);
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}
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return $creatImg;
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}
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//輸出圖片，link—只輸出，不保存文件。file–保存爲文件
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function EchoImage($img,$to_File)
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{
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switch($this->echoType)
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{
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case "link":
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if(function_exists('imagejpeg')) return ImageJpeg($img);
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else return ImagePNG($img);
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break;
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case "file":
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if(function_exists('imagejpeg'))return ImageJpeg($img,$to_File,100);
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else return ImagePNG($img,$to_File);
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break;
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}
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}
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}
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?>
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