236 lines
7.1 KiB
PHP
Executable File
236 lines
7.1 KiB
PHP
Executable File
<?php
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/**
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* 功能：图片处理
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* 基本参数：$srcFile,$echoType
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*
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* eg：
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* $cm=new ImageThumb('1.jpg','file');
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*
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* $cm->Distortion('dis_bei.jpg',150,200); //生成固定宽高缩略图；
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* $cm->Prorate('pro_bei.jpg',150,200); //等比缩略图；附带切割
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* $cm->Cut('cut_bei.jpg',150,200); //等比缩略图；多出部分切割
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* $cm->BackFill('fill_bei.jpg',150,200); //等比缩略图；多出部分填充
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*
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* $cm->imgRotate('out.jpg',90); //旋转图片
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*/
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class ImageThumb {
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var $srcFile = ''; //原图
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var $imgData = ''; //图片信息
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var $echoType; //输出图片类型，link--不保存为文件；file--保存为文件
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var $im = ''; //临时变量
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var $srcW = ''; //原图宽
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var $srcH = ''; //原图高
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function __construct($srcFile, $echoType){
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$this->srcFile = $srcFile;
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$this->echoType = $echoType;
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$this->im = self::image($srcFile);
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if(!$this->im){
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return false;
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}
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$info = '';
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$this->imgData = GetImageSize($srcFile, $info);
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$this->srcW = imageSX($this->im);
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$this->srcH = imageSY($this->im);
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return $this;
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}
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public static function image($file){
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$info = '';
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$data = GetImageSize($file, $info);
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$img = false;
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//var_dump($data,$file,memory_get_usage()-$GLOBALS['config']['appMemoryStart']);
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switch ($data[2]) {
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case IMAGETYPE_GIF:
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if (!function_exists('imagecreatefromgif')) {
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break;
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}
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$img = imagecreatefromgif($file);
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break;
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case IMAGETYPE_JPEG:
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if (!function_exists('imagecreatefromjpeg')) {
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break;
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}
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$img = imagecreatefromjpeg($file);
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break;
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case IMAGETYPE_PNG:
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if (!function_exists('imagecreatefrompng')) {
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break;
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}
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$img = @imagecreatefrompng($file);
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imagesavealpha($img,true);
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break;
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case IMAGETYPE_XBM:
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$img = imagecreatefromxbm($file);
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break;
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case IMAGETYPE_WBMP:
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$img = imagecreatefromwbmp($file);
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break;
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case IMAGETYPE_BMP:
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$img = imagecreatefrombmp($file);
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break;
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default:break;
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}
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return $img;
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}
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public static function imageSize($file){
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$size = GetImageSize($file);
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if(!$size){
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return false;
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}
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return array('width'=>$size[0],"height"=>$size[1]);
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}
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// 生成扭曲型缩图
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function distortion($toFile, $toW, $toH){
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$cImg = $this->creatImage($this->im, $toW, $toH, 0, 0, 0, 0, $this->srcW, $this->srcH);
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return $this->echoImage($cImg, $toFile);
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}
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// 生成按比例缩放的缩图
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function prorate($toFile, $toW, $toH){
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$toWH = $toW / $toH;
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$srcWH = $this->srcW / $this->srcH;
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if ($toWH<=$srcWH) {
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$ftoW = $toW;
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$ftoH = $ftoW * ($this->srcH / $this->srcW);
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} else {
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$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 > $toH) {
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$cImg = $this->creatImage($this->im, $ftoW, $ftoH, 0, 0, 0, 0, $this->srcW, $this->srcH);
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return $this->echoImage($cImg, $toFile);
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} else {
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$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, $toFile);
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}
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}
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// 生成最小裁剪后的缩图
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function cut($toFile, $toW, $toH){
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$toWH = $toW / $toH;
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$srcWH = $this->srcW / $this->srcH;
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if ($toWH<=$srcWH) {
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$ctoH = $toH;
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$ctoW = $ctoH * ($this->srcW / $this->srcH);
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} else {
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$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, $toH);
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imageDestroy($allImg);
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return $this->echoImage($cImg, $toFile);
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}
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// 生成背景填充的缩图,默认用白色填充剩余空间，传入$isAlpha为真时用透明色填充
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function backFill($toFile, $toW, $toH,$isAlpha=false,$red=255, $green=255, $blue=255){
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$toWH = $toW / $toH;
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$srcWH = $this->srcW / $this->srcH;
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if ($toWH<=$srcWH) {
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$ftoW = $toW;
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$ftoH = $ftoW * ($this->srcH / $this->srcW);
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} else {
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$ftoH = $toH;
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$ftoW = $ftoH * ($this->srcW / $this->srcH);
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}
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if (function_exists('imagecreatetruecolor')) {
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@$cImg = imageCreateTrueColor($toW, $toH);
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if (!$cImg) {
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$cImg = imageCreate($toW, $toH);
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}
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} else {
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$cImg = imageCreate($toW, $toH);
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}
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$fromTop = ($toH - $ftoH)/2;//从正中间填充
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$backcolor = imagecolorallocate($cImg,$red,$green, $blue); //填充的背景颜色
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if ($isAlpha){//填充透明色
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$backcolor=imageColorTransparent($cImg,$backcolor);
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$fromTop = $toH - $ftoH;//从底部填充
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}
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imageFilledRectangle($cImg, 0, 0, $toW, $toH, $backcolor);
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if ($this->srcW > $toW || $this->srcH > $toH) {
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$proImg = $this->creatImage($this->im, $ftoW, $ftoH, 0, 0, 0, 0, $this->srcW, $this->srcH);
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if ($ftoW < $toW) {
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imageCopy($cImg, $proImg, ($toW - $ftoW) / 2, 0, 0, 0, $ftoW, $ftoH);
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} else if ($ftoH < $toH) {
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imageCopy($cImg, $proImg, 0, $fromTop, 0, 0, $ftoW, $ftoH);
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} else {
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imageCopy($cImg, $proImg, 0, 0, 0, 0, $ftoW, $ftoH);
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}
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} else {
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imageCopyMerge($cImg, $this->im, ($toW - $ftoW) / 2,$fromTop, 0, 0, $ftoW, $ftoH, 100);
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}
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return $this->echoImage($cImg, $toFile);
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}
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function creatImage($img, $creatW, $creatH, $dstX, $dstY, $srcX, $srcY, $srcImgW, $srcImgH){
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if (function_exists('imagecreatetruecolor')) {
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@$creatImg = ImageCreateTrueColor($creatW, $creatH);
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@imagealphablending($creatImg,false);//是不合并颜色,直接用$img图像颜色替换,包括透明色;
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@imagesavealpha($creatImg,true);//不要丢了$thumb图像的透明色;
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if ($creatImg){
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imageCopyResampled($creatImg, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
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}else {
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$creatImg = ImageCreate($creatW, $creatH);
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imageCopyResized($creatImg, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
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}
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} else {
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$creatImg = ImageCreate($creatW, $creatH);
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imageCopyResized($creatImg, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH);
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}
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return $creatImg;
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}
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// Rotate($toFile, 90);
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public function imgRotate($toFile,$degree) {
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if (!$this->im ||
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$degree % 360 === 0 ||
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!function_exists('imageRotate')) {
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return false;
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}
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$rotate = imageRotate($this->im,360-$degree,0);
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$result = false;
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switch ($this->imgData[2]) {
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case IMAGETYPE_GIF:
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$result = imagegif($rotate, $toFile);
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break;
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case IMAGETYPE_JPEG:
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$result = imagejpeg($rotate, $toFile,100);//压缩质量
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break;
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case IMAGETYPE_PNG:
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$result = imagePNG($rotate, $toFile);
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break;
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default:break;
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}
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imageDestroy($rotate);
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imageDestroy($this->im);
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return $result;
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}
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// 输出图片，link---只输出，不保存文件。file--保存为文件
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function echoImage($img, $toFile){
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if(!$img) return false;
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ob_get_clean();
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$result = false;
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switch ($this->echoType) {
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case 'link':$result = imagePNG($img);break;
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case 'file':$result = imagePNG($img, $toFile);break;
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//return ImageJpeg($img, $to_File);
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}
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imageDestroy($img);
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imageDestroy($this->im);
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return $result;
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}
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}
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if(!function_exists('imagecreatefrombmp')){
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function imagecreatefrombmp( $filename ){
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return imageGdBMP::load($filename);
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}
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}
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