php 圖片處理類，縮略，水印

class Image {

?/**
? * @var string $fileName 文件名
? * @access private
? */
?private $fileName = '';
?
?/**
? * @var gd resource $imageResource 原圖像
? * @access private
? */
?private $imageResource = NULL;
?
?/**
? * @var int $imageWidth 原圖像寬
? * @access private
? */
?private $imageWidth = NULL;
?
?/**
? * @var int $imageHeight 原圖像高
? * @access private
? */
?private $imageHeight = NULL;
?
?/**
? * @var int $imageType 原圖像類型
? * @access private
? */
?private $imageType = NULL;
?
?/**
? * @var int $newResource 新圖像
? * @access private
? */
?private $newResource = NULL;
?
?/**
? * @var int $newResType 新圖像類型
? * @access private
? */
?private $newResType = NULL;
?
?/**
? * 構(gòu)造函數(shù)
? * @param string $fileName 文件名
???? */
?public function __construct($fileName = NULL) {
??$this->fileName = $fileName;
??if ($this->fileName) {
???$this->getSrcImageInfo();
??}
?}
?
?/**
? * 取源圖像信息
? * @access private
? * @return void
? */
?private function getSrcImageInfo() {
??$info = $this->getImageInfo();
??$this->imageWidth = $info[0];
??$this->imageHeight = $info[1];
??$this->imageType = $info[2];
?}

?/**
? * 取圖像信息
? * @param string $fileName 文件名
? * @access private
? * @return array
? */
?private function getImageInfo($fileName = NULL) {
??if ($fileName==NULL) {
???$fileName = $this->fileName;
??}
??$info = getimagesize($fileName);
??return $info;
?}

?/**
? * 創(chuàng)建源圖像GD 資源
? * @access private
? * @return void
? */
?private function createSrcImage () {
??$this->imageResource = $this->createImageFromFile();
?}

?/**
? * 跟據(jù)文件創(chuàng)建圖像GD 資源
? * @param string $fileName 文件名
? * @return gd resource
? */
??? public function createImageFromFile($fileName = NULL)
??? {
??if (!$fileName) {
???$fileName = $this->fileName;
???$imgType = $this->imageType;
??}
??????? if (!is_readable($fileName) || !file_exists($fileName)) {
??????????? throw new Exception('Unable to open file "' . $fileName . '"');
??????? }

??if (!$imgType) {
???$imageInfo = $this->getImageInfo($fileName);
???$imgType = $imageInfo[2];
??}
??
??????? switch ($imgType) {
??case IMAGETYPE_GIF:
???$tempResource = imagecreatefromgif($fileName);
???break;
??case IMAGETYPE_JPEG:
???$tempResource = imagecreatefromjpeg($fileName);
???break;
??case IMAGETYPE_PNG:
???$tempResource = imagecreatefrompng($fileName);
???break;
??case IMAGETYPE_WBMP:
???$tempResource = imagecreatefromwbmp($fileName);
???break;
??case IMAGETYPE_XBM:
???$tempResource = imagecreatefromxbm($fileName);
???break;
??default:
???throw new Exception('錯(cuò)誤的圖片格式，或圖片有問(wèn)

題！');
??????? }
??return $tempResource;
??? }
?/**
? * 改變圖像大小
? * @param int $width 寬
? * @param int $height 高
? * @param string $flag 按什么方式改變 0=長(zhǎng)寬轉(zhuǎn)換成參數(shù)指定的 1=按比

例縮放，長(zhǎng)寬約束在參數(shù)指定內(nèi)，2=以寬為約束縮放，3=以高為約束縮放
? * @return string
? */
?public function resizeImage($width, $height, $flag=1) {
??global $cfg;
??$widthRatio = $width/$this->imageWidth;
??$heightRatio = $height/$this->imageHeight;
??switch ($flag) {
??case 1:
???if ($this->imageHeight

>imageWidth ????$endWidth = $this->imageWidth;
????$endHeight = $this->imageHeight;
????//return;
???} elseif (($this->imageHeight * $widthRatio)

>$height) {
????$endWidth = ceil($this->imageWidth *

$heightRatio);
????$endHeight = $height;
???} else {
????$endWidth = $width;
????$endHeight = ceil($this->imageHeight *

$widthRatio);
???}
???break;
??case 2:
???$endWidth = $width;
???$endHeight = ceil($this->imageHeight * $widthRatio);
???break;
??case 3:
???$endWidth = ceil($this->imageWidth * $heightRatio);
???$endHeight = $height;
???break;
??case 4:
???$endWidth2 = $width;
???$endHeight2 = $height;
???if ($this->imageHeight

>imageWidth ????$endWidth = $this->imageWidth;
????$endHeight = $this->imageHeight;
????//return;
???} elseif (($this->imageHeight * $widthRatio)

????$endWidth = ceil($this->imageWidth *

$heightRatio);
????$endHeight = $height;
???} else {
????$endWidth = $width;
????$endHeight = ceil($this->imageHeight *

$widthRatio);
???}
???break;
??case 5:
???$endWidth2 = $width;
???$endHeight2 = $height;
???if ($this->imageHeight > $height && $this-

>imageWidth > $width) {
????//都大
????$ratio = max($this->imageHeight/

$height,$this->imageWidth/$width);
???}elseif ($this->imageHeight > $height){
????$ratio = $this->imageHeight/$height;
???}elseif ( $this->imageWidth > $width){
????$ratio =$this->imageWidth/$width;
???}else{
????$ratio =1;
???}
???
???$endWidth = $this->imageWidth / $ratio;
???$endHeight = $this->imageHeight / $ratio;
???
???break;
??default:
???$endWidth = $width;
???$endHeight = $height;
???break;
??}
??if ($this->imageResource==NULL) {
???$this->createSrcImage();
??}
??if($flag == 5){
???//直接縮略
???$this->newResource = imagecreatefromjpeg($cfg

['path']['data'].'blank_thumb.jpg');
??}elseif ($flag==4) {
???$this->newResource = imagecreatetruecolor

($endWidth2,$endHeight2);
??} else {
???$this->newResource = imagecreatetruecolor

($endWidth,$endHeight);
??}
??$this->newResType = $this->imageType;
??if($flag == 5){
???$dest_x = ($width-$endWidth)/2;
???$dest_y = ($height-$endHeight)/2;
???imagecopyresampled($this->newResource, $this-

>imageResource, $dest_x, $dest_y, 0, 0, $endWidth, $endHeight,$this-

>imageWidth,$this->imageHeight);
??}else{
???imagecopyresampled($this->newResource, $this-

>imageResource, 0, 0, 0, 0, $endWidth, $endHeight,$this->imageWidth,$this-

>imageHeight);
??}
?}

?/**
? * 給圖像加水印
? * @param string $waterContent 水印內(nèi)容可以是圖像文件名，也可以是文

字
? * @param int $pos 位置0-9可以是數(shù)組
? * @param int $textFont 字體大字，當(dāng)水印內(nèi)容是文字時(shí)有效
? * @param string $textColor 文字顏色，當(dāng)水印內(nèi)容是文字時(shí)有效
? * @return string
? */
?public function waterMark($waterContent, $pos = 0, $textFont=5,

$textColor="#ffffff") {
??$isWaterImage = file_exists($waterContent);
??if ($isWaterImage) {
???$waterImgRes = $this->createImageFromFile

($waterContent);
???$waterImgInfo = $this->getImageInfo($waterContent);
???$waterWidth = $waterImgInfo[0];
???$waterHeight = $waterImgInfo[1];
??} else {
???$waterText = $waterContent;
???//$temp = @imagettfbbox(ceil

($textFont*2.5),0,"./cour.ttf",$waterContent);
???if ($temp) {
????$waterWidth = $temp[2]-$temp[6];
????$waterHeight = $temp[3]-$temp[7];
???} else {
????$waterWidth = 100;
????$waterHeight = 12;
???}
??}
??if ($this->imageResource==NULL) {
???$this->createSrcImage();
??}
??switch($pos)
??{
??case 0://隨機(jī)
???$posX = rand(0,($this->imageWidth - $waterWidth));
???$posY = rand(0,($this->imageHeight - $waterHeight));
???break;
??case 1://1為頂端居左
???$posX = 0;
???$posY = 0;
???break;
??case 2://2為頂端居中
???$posX = ($this->imageWidth - $waterWidth) / 2;
???$posY = 0;
???break;
??case 3://3為頂端居右
???$posX = $this->imageWidth - $waterWidth;
???$posY = 0;
???break;
??case 4://4為中部居左
???$posX = 0;
???$posY = ($this->imageHeight - $waterHeight) / 2;
???break;
??case 5://5為中部居中
???$posX = ($this->imageWidth - $waterWidth) / 2;
???$posY = ($this->imageHeight - $waterHeight) / 2;
???break;
??case 6://6為中部居右
???$posX = $this->imageWidth - $waterWidth;
???$posY = ($this->imageHeight - $waterHeight) / 2;
???break;
??case 7://7為底端居左
???$posX = 0;
???$posY = $this->imageHeight - $waterHeight;
???break;
??case 8://8為底端居中
???$posX = ($this->imageWidth - $waterWidth) / 2;
???$posY = $this->imageHeight - $waterHeight;
???break;
??case 9://9為底端居右
???$posX = $this->imageWidth - $waterWidth-20;
???$posY = $this->imageHeight - $waterHeight-10;
???break;
??default://隨機(jī)
???$posX = rand(0,($this->imageWidth - $waterWidth));
???$posY = rand(0,($this->imageHeight - $waterHeight));
???break;????
??}
??imagealphablending($this->imageResource, true);?
??if($isWaterImage) {
???imagecopy($this->imageResource, $waterImgRes, $posX,

$posY, 0, 0, $waterWidth,$waterHeight);???
??} else {
???$R = hexdec(substr($textColor,1,2));
???$G = hexdec(substr($textColor,3,2));
???$B = hexdec(substr($textColor,5));
???
???$textColor = imagecolorallocate($this-

>imageResource, $R, $G, $B);
???imagestring ($this->imageResource, $textFont, $posX,

$posY, $waterText, $textColor);????????
??}
??$this->newResource =? $this->imageResource;
??$this->newResType = $this->imageType;
?}
?
?/**
? * 生成驗(yàn)證碼圖片
? * @param int $width 寬
? * @param string $height 高
? * @param int $length 長(zhǎng)度
? * @param int $validType 0=數(shù)字,1=字母,2=數(shù)字加字母
? * @param string $textColor 文字顏色
? * @param string $backgroundColor 背景顏色
? * @return void
? */
?public function imageValidate($width, $height, $length = 4,

$validType = 1, $textColor = '#000000', $backgroundColor = '#ffffff') {
??if ($validType==1) {
???//$validString =

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
???//$validLength = 52;
???//no i no l
???$validString =

'abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
???$validLength = 48;
??} elseif ($validType==2) {
???//$validString =

'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
???//$validLength = 62;
???//no i no l no 1
???$validString =

'023456789abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
???$validLength = 57;
??} else {
???$validString = '0123456789';
???$validLength = 10;
??}
??
??srand((int)time());
??$valid = '';
??for ($i=0; $i???$valid .= $validString{rand(0, $validLength-1)};
??}
??$this->newResource = imagecreate($width,$height);
??$bgR = hexdec(substr($backgroundColor,1,2));
??$bgG = hexdec(substr($backgroundColor,3,2));
??$bgB = hexdec(substr($backgroundColor,5,2));
??$backgroundColor = imagecolorallocate($this->newResource,

$bgR, $bgG, $bgB);
??$tR = hexdec(substr($textColor,1,2));
??$tG = hexdec(substr($textColor,3,2));
??$tB = hexdec(substr($textColor,5,2));
??$textColor = imagecolorallocate($this->newResource, $tR,

$tG, $tB);
??for ($i=0;$i???imagestring($this->newResource,5,$i*$width/

$length+3,2, $valid[$i],$textColor);
??}
??$this->newResType = IMAGETYPE_JPEG;
??return $valid;

?}
?
?/**
? * 顯示輸出圖像
? * @return void
? */
?public function display($fileName='', $quality=60) {
?
??$imgType = $this->newResType;
??$imageSrc = $this->newResource;
??????? switch ($imgType) {
??case IMAGETYPE_GIF:
???if ($fileName=='') {
????header('Content-type: image/gif');
???}
???imagegif($imageSrc, $fileName, $quality);
???break;
??case IMAGETYPE_JPEG:
???if ($fileName=='') {
????header('Content-type: image/jpeg');
???}
???imagejpeg($imageSrc, $fileName, $quality);
???break;
??case IMAGETYPE_PNG:
???if ($fileName=='') {
????header('Content-type: image/png');
????imagepng($imageSrc);
???} else {
????imagepng($imageSrc, $fileName);
???}
???break;
??case IMAGETYPE_WBMP:
???if ($fileName=='') {
????header('Content-type: image/wbmp');
???}
???imagewbmp($imageSrc, $fileName, $quality);
???break;
??case IMAGETYPE_XBM:
???if ($fileName=='') {
????header('Content-type: image/xbm');
???}
???imagexbm($imageSrc, $fileName, $quality);
???break;
??default:
???throw new Exception('Unsupport image type');
??????? }
??imagedestroy($imageSrc);
?}
?
?/**
? * 保存圖像
? * @param int $fileNameType 文件名類型 0使用原文件名，1使用指定的文

件名，2在原文件名加上后綴，3產(chǎn)生隨機(jī)文件名
? * @param string $folder 文件夾路徑 為空為與原文件相同
? * @param string $param 參數(shù)$fileNameType為2時(shí)為文件名加后綴
? * @return void
? */
?public function save($fileNameType = 0, $folder = NULL, $param =

'_miniature') {
??if ($folder==NULL) {
???$folder = dirname($this-

>fileName).DIRECTORY_SEPARATOR;
???
??}
??$fileExtName = FileSystem::fileExt($this->fileName, true);
??$fileBesicName = FileSystem::getBasicName($this->fileName,

false);
??switch ($fileNameType) {
???case 1:
????//$newFileName = $folder.$param;
????$newFileName = $folder.basename($this-

>fileName);
????//var_dump($newFileName);
????break;
???case 2:
????$newFileName =

$folder.$fileBesicName.$param.$fileExtName;
????break;
???case 3:
????$tmp = date('YmdHis');
????$fileBesicName = $tmp;
????$i = 0;
????while (file_exists

($folder.$fileBesicName.$fileExtName)) {
?????$fileBesicName = $tmp.$i;
?????$i++;
????}
????$newFileName =

$folder.$fileBesicName.$fileExtName;
????break;
???default:
????$newFileName = $this->fileName;
????break;
??}
??$this->display($newFileName);
??return $newFileName;
?}
?/**
? * 剪切出選定區(qū)域
? *
? * @param string $srcimgurl? 原圖
? * @param string $endimgurl 處理過(guò)的圖
? * @param int $x 坐標(biāo)原點(diǎn)X
? * @param int $y 坐標(biāo)原點(diǎn)Y
? * @param int $endimg_w 最終圖寬
? * @param int $endimg_h 最終圖高
? * @param int $border_w 末坐標(biāo)X
? * @param int $border_h 末坐標(biāo)Y
? * @param int $scale 原圖縮放情況百分比
? * @param int $fix 是否自動(dòng)取值
? */
?public function cutimg

($srcimgurl,$endimgurl,$x,$y,$endimg_w,$endimg_h,$border_w,$border_h,$scale=

100,$fix=0){
??$path = dirname ($endimgurl);
??if (!is_dir($path)) {
???if(!@mkdir ($path, 0777)){
????die ("{$path} 此目錄不能創(chuàng)建,文件創(chuàng)建失敗");
???}
??}
??$ground_info = getimagesize($srcimgurl);
??switch($ground_info[2]){
???case 1:$im = imagecreatefromgif($srcimgurl);break;
???case 2:$im = imagecreatefromjpeg($srcimgurl);break;
???case 3:$im = imagecreatefrompng($srcimgurl);break;
???default:die("圖片格式不允許$srcimgurl");
???? }
??if($fix){//方便截取頭像的一部分
???if($ground_info[0]????$border_w=$ground_info[0];
????$border_h=$endimg_h*$ground_info[0]/

$endimg_w;
???}elseif($ground_info[0]>$ground_info[1]){
????$border_h=$ground_info[1];
????$border_w=$endimg_w*$ground_info[1]/

$endimg_h;
???}else{
????$border_w=$ground_info[0];
????$border_h=$ground_info[1];
???}
??}
??$newim = imagecreatetruecolor($endimg_w, $endimg_h);
??$x=($x*100)/$scale;
??$y=($y*100)/$scale;
??$border_width=($border_w*100)/$scale;
??$border_height=($border_h*100)/$scale;
??imagecopyresampled($newim, $im, 0,0, $x,$y, $endimg_w,

$endimg_h, $border_width, $border_height );
??if(function_exists("imagegif")){
???switch($ground_info[2]){
????case 1:imagegif($newim,$endimgurl);break;
????case 2:imagejpeg($newim,$endimgurl);break;
????case 3:imagepng($newim,$endimgurl);break;
????default:die("errorMsg");
???}
??}elseif(function_exists("imagejpeg")){
???imagejpeg($newim,$endimgurl);
??}else{
???imagepng($newim,$endimgurl);
??}
??imagedestroy ($newim);
??imagedestroy ($im);
?}
}