分享php多功能图片处理类
这篇文章主要为大家分享php多功能图片处理类,方便大家进行学习研究,感兴趣的小伙伴们可以参考一下,本文实例为大家分享了多功能php图片处理类,供大家参考,具体内容如下:
- <?php
- /**
- * Image.class.php 图像处理类
- * @author Administrator
- *
- */
- class Image{
- private $path='';
- /**
- * 构造方法
- * @param unknown $path
- */
- function __construct($path=''){
- if (!emptyempty($path)) {
- $this->path=$path;
- }
- }
- /**
- +-----------------------------------------------
- * 等比缩放函数
- +-----------------------------------------------
- * @param unknown $name 需处理图片的名称
- * @param unknown $width 缩放后的宽度
- * @param unknown $height 缩放后的高度
- * @param string $thumb_prixs 缩放后的前缀名
- * @return mixed $newname 返回的缩放后的文件名
- */
- function thumb($name,$width,$height,$thumb_prixs='th_'){
- //获取图片信息
- $Info=$this->ImageInfo($name); //图片的宽度,高度,类型
- //获取图片资源,各种类型的图片都可以创建资源,jpg,gif,png
- $imagres=$this->Img_resouce($name, $Info);
- //获取计算图片等比例之后的大小,
- $size=$this->getNewSize($name,$width,$height,$Info);
- //获取新的图片资源,处理透明背景
- $newimg=$this->getImage($imagres,$size,$Info);
- //另存为一个新的图片,返回新的缩放后的图片名称
- $newname=$this->SaveNewImage($newimg,$thumb_prixs.$name,$Info);
- return $newname;
- }
- /**
- +-----------------------------------------------------------------------
- * 水印标记函数
- +-----------------------------------------------------------------------
- * @param unknown $backname 背景文件名
- * @param unknown $watername 水印文件名
- * @param number $waterpos 水印位置
- * @param string $wa_prixs 水印前缀名
- * @return boolean
- */
- function waterMark($backname,$watername,$waterpos=0,$wa_prixs='wa_') {
- if (file_exists($this->path.$backname) && file_exists($this->path.$watername)) {
- $backinfo=$this->ImageInfo($backname);
- $waterinfo=$this->ImageInfo($watername);
- if(!$pos=$this->getPos($backinfo, $waterinfo, $waterpos)){
- echo "水印图片不应该比背景图片小";
- return false;
- }
- $backimg=$this->Img_resouce($backname, $backinfo);
- $waterimg=$this->Img_resouce($watername, $waterinfo);
- var_dump($backimg);exit();
- $backimg=$this->CopyImage($backimg, $waterimg, $pos, $waterinfo);
- $this->SaveNewImage($backimg, $wa_prixs.$backname, $backinfo);
- }else{
- echo "图片或水印不存在";
- return false;
- }
- }
- /**
- +-----------------------------------------------------------------------
- * 获取图片信息函数
- +-----------------------------------------------------------------------
- * @param unknown $name
- * @return unknown
- */
- private function ImageInfo($img) {
- $imageInfo=getimagesize($img);
- if ($imageInfo!==false) {
- $imageType=strtolower(substr(image_type_to_extension($imageInfo[2]),1));
- $imageSize=filesize($img);
- $Info=array(
- "width" => $imageInfo[0],
- "height" => $imageInfo[1],
- "type" => $imageType,
- "size" => $imageSize,
- "mime" => $imageInfo['mime']
- );
- return $Info;
- }else{
- return false;
- }
- }
- /**
- +--------------------------------------------------------
- * 创建原图像格式函数
- +--------------------------------------------------------
- * @param unknown $name
- * @param unknown $imaginfo
- * @return boolean|resource
- */
- private function Img_resouce($name,$imageinfo){
- $iamgeres=$this->path.$name;
- //var_dump($iamgeres);exit();
- switch ($imageinfo['type']) {
- case 'gif':
- $img=imagecreatefromgif($name);
- break;
- case 'jpg':
- $img=imagecreatefromjpeg($name);
- break;
- case 'png':
- $img=imagecreatefrompng($name);
- break;
- }
- return $img;
- }
- /**
- +--------------------------------------------------
- * 获取等比缩放尺寸函数
- +--------------------------------------------------
- * @param unknown $name
- * @param unknown $width
- * @param unknown $height
- * @param unknown $imaginfo
- * @return Ambigous <unknown, number>
- */
- private function getNewSize($name,$width,$height,$imaginfo){
- $size['width']=$imaginfo['width'];
- $size['height']=$imaginfo['height'];
- if ($width<$imaginfo['width']) {
- $size['width']=$width;
- }
- if ($height<$imaginfo['height']) {
- $size['height']=$height;
- }
- //图像等比例缩放算法
- if ($imaginfo['width']*$size['width']>$imaginfo['height']*$size['height']) {
- $size['height']=round($imaginfo['height']*$size['width']/$imaginfo['width']);
- }else{
- $size['width']=round($imaginfo['width']*$size['height']/$imaginfo['height']);
- }
- return $size;
- }
- private function getImage($imageres,$size,$imageinfo){
- //新建一个真彩色图像
- $newimg=imagecreatetruecolor($size['width'], $size['height']);
- //将某个颜色定义为透明色
- $otsc=imagecolortransparent($imageres);
- //获取图像的调色板的颜色数目
- if ($otsc>=0&&$otsc<=imagecolorstotal($imageres)) {
- //取得某索引的颜色
- $stran=imagecolorsforindex($imageres, $otsc);
- //为图像分配颜色
- $newt=imagecolorallocate($imageres, $stran['red'], $stran['green'], $stran['blue']);
- //区域填充函数
- imagefill($newimg, 0, 0, $newt);
- //为图像定义透明色
- imagecolortransparent($newimg,$newt);
- }
- imagecopyresized($newimg, $imageres, 0, 0, 0, 0, $size['width'], $size['height'], $imageinfo['width'], $imageinfo['height']);
- imagedestroy($imageres);
- return $newimg;
- }
- /**
- +----------------------------------------------
- *保存图像函数
- +----------------------------------------------
- * @param unknown $newimg
- * @param unknown $newname
- * @param unknown $imageinfo
- * @return unknown
- */
- private function SaveNewImage($newimg,$newname,$imageinfo){
- switch ($imageinfo['type']){
- case 1://gif
- $result=imagegif($newimg,$this->path.$newname);
- break;
- case 2://jpg
- $result=imagejpeg($newimg,$this->path.$newname);
- break;
- case 3://png
- $result=imagepng($newimg,$this->path.$newname);
- break;
- }
- imagedestroy($newimg);
- return $newname;
- }
- /**
- +-----------------------------------------------------------------
- * 获取水印位置函数
- +-----------------------------------------------------------------
- * @param unknown $backinfo 背景信息
- * @param unknown $waterinfo 水印信息
- * @param unknown $waterpos 水印位置
- * @return boolean|multitype:number 返回坐标数组
- */
- private function getPos($backinfo,$waterinfo,$waterpos) {
- if ($backinfo['width']<$waterinfo['width']||$backinfo['height']<$waterinfo['height']) {
- return false;
- }
- switch ($waterpos) {
- case 1://左上角
- $posX=0;
- $posY=0;
- break;
- case 2://中上方
- $posX=$backinfo['width']-$waterinfo['width']/2;
- $posY=0;
- break;
- case 3://右上角
- $posX=$backinfo['width']-$waterinfo['width'];
- $posY=0;
- break;
- case 4://左中方
- $posX=0;
- $posY=$backinfo['height']-$waterinfo['height']/2;
- break;
- case 5://正中间
- $posX=$backinfo['width']-$waterinfo['width']/2;
- $posY=$backinfo['height']-$waterinfo['height']/2;
- break;
- case 6://右中方
- $posX=$backinfo['width']-$waterinfo['width'];
- $posY=$backinfo['height']-$waterinfo['height']/2;
- break;
- case 7://底部靠左
- $posX=0;
- $posY=$backinfo['height']-$waterinfo['height'];
- break;
- case 8://底部居中
- $posX=$backinfo['width']-$waterinfo['width']/2;
- $posY=$backinfo['height']-$waterinfo['height'];
- break;
- case 9://底部靠右
- $posX=$backinfo['width']-$waterinfo['width'];
- $posY=$backinfo['height']-$waterinfo['height'];
- break;
- case 0:
- default :
- $posX=rand(0,$backinfo['width']-$waterinfo['width']);
- $posY=rand(0,$backinfo['height']-$waterinfo['height']);
- break;
- }
- return array('posX'=>$posX,'posY'=>$posY);
- }
- /**
- +-------------------------------------------------------------------
- * 拷贝图像
- +-------------------------------------------------------------------
- * @param unknown $backimg 背景资源
- * @param unknown $waterimg 水印资源
- * @param unknown $pos 水印位置
- * @param unknown $waterinfo 水印信息
- * @return unknown
- */
- private function CopyImage($backimg,$waterimg,$pos,$waterinfo) {
- imagecopy($backimg, $waterimg, $pos['posX'], $pos['posY'], 0, 0, $waterinfo['width'], $waterinfo['height']);
- imagedestroy($waterimg);
- return $backimg;
- }
- }
- ?>
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