本文實例講述了CI框架封裝的常用圖像處理方法。分享給大家供大家參考,具體如下:
其實微信手機端上圖時,列表圖最好是縮略圖,節省流量,這不,又被移動坑了一把,話費簽一分就停機,流量欠到90塊才停機,我也是醉了。。。
不說廢話了,下面是用CI 的內置處理圖像的庫寫的,小弟不才,遺漏之處敬請指出,謝謝。
/** * 生成縮略圖 * @param $path 原圖的本地路徑 * @return null 創建一個 原圖_thumb.擴展名 的文件 * */ public function dealthumb($path){ $config['image_library'] = 'gd2'; $config['source_image'] = $path; $config['create_thumb'] = TRUE; //生成的縮略圖將在保持縱橫比例 在寬度和高度上接近所設定的width和height $config['maintain_ratio'] = TRUE; $config['width'] = 80; $config['height'] = 80; $this->load->library('image_lib', $config); $this->image_lib->resize(); $this->image_lib->clear(); } /* * 處理圖像旋轉 */ public function transroate($path,$imgpath){ $this->load->library('image_lib'); //(必須)設置圖像庫 $config['image_library'] = 'gd2'; $newname = time().'_rote.jpg'; //設置圖像的目標名/路徑 $config['new_image'] =$imgpath.$newname; //(必須)設置原始圖像的名字/路徑 $config['source_image'] = $path; //決定新圖像的生成是要寫入硬盤還是動態的存在 $config['dynamic_output'] = FALSE; //設置圖像的品質。品質越高,圖像文件越大 $config['quality'] = '90%'; //有5個旋轉選項 逆時針90 180 270 度 vrt 豎向翻轉 hor 橫向翻轉 $config['rotation_angle'] = 'vrt'; $this->image_lib->initialize($config); if(@$this->image_lib->rotate()){ $this->image_lib->clear(); return $config['new_image']; }else{ $this->image_lib->clear(); return ''; } } /** * 處理圖像水印 */ public function overlay($path,$imgpath){ $this->load->library('image_lib'); $newname = time().'_over.jpg'; //設置新圖像名稱 $config['new_image'] =$imgpath.$newname; //調用php gd庫 繪圖 $config['image_library'] = 'gd2'; //源圖像 本地地址 $config['source_image'] = $path; //覆蓋文字 $config['wm_text'] = 'Copyright 2015 - Friker'; //覆蓋類型 文字/圖像 $config['wm_type'] = 'text'; //文字字體類型 //$config['wm_font_path'] = 'C:\Windows\Fonts\vrinda.ttf'; //字體大小 $config['wm_font_size'] = '16'; //字體顏色 $config['wm_font_color'] = 'ff0000'; //垂直方向距離頂端距離 $config['wm_vrt_alignment'] = '20'; //水平方向距離左端距離 $config['wm_hor_alignment'] = 'center'; //padding $config['wm_padding'] = '20'; $this->image_lib->initialize($config); if($this->image_lib->watermark()){ $this->image_lib->clear(); return $config['new_image']; }else{ $this->image_lib->clear(); return ''; } } /** * 處理圖片上傳 * 文件上傳類 通過前台 上傳文件 */ public function uploadfile(){ //文件上傳部分 // 處理文件 // $data = ''; $this->load->helper('url'); $formpic = key($_FILES); //文件處理部分 if(false === empty($_FILES[$formpic]['tmp_name'])){ //設置文件上傳的路徑 $upload['upload_path'] = "./public/img/"; //限制文件上傳的類型 $upload['allowed_types'] = 'jpeg|jpg|gif|png'; //限制文件上傳的大小 $upload['max_size'] = 2048; //設置文件上傳的路徑 $upload['file_name'] = date('YmdHis', time()).rand(10000, 99999); //加載文件上傳配置信息 $this->load->library('upload', $upload); //處理文件上傳 $this->upload->do_upload($formpic); //返回文件上傳信息 $image = $this->upload->data(); /* 'file_name' => string '2015071702051718388.jpg' (length=23) 'file_type' => string 'image/jpeg' (length=10) 'file_path' => string 'E:/wamp/www/testci/public/img/' (length=30) 'full_path' => string 'E:/wamp/www/testci/public/img/2015071702051718388.jpg' (length=53) 'raw_name' => string '2015071702051718388' (length=19) 'orig_name' => string '2015071702051718388.jpg' (length=23) 'client_name' => string 'u=415761610,1548338330&fm=116&gp=0.jpg' (length=38) 'file_ext' => string '.jpg' (length=4) 'file_size' => float 3.74 'is_image' => boolean true 'image_width' => int 146 'image_height' => int 220 'image_type' => string 'jpeg' (length=4) 'image_size_str' => string 'width="146" height="220"' (length=24) */ //var_dump($image); //返回文件上傳名字 $data = $image['file_name']; $this->dealthumb($image['full_path']); $this->overlay($image['full_path'],$image['file_path']); $this->transroate($image['full_path'],$image['file_path']);// $thumbdata = ''; //生成縮略圖名稱 $pos = strripos($image['file_name'], "."); $newname = substr($image['file_name'], 0,$pos)."_thumb".substr($image['file_name'], $pos); if(file_exists($image['file_path'].$newname)){ $thumbdata = $newname; } } //$dirroot = $_SERVER['DOCUMENT_ROOT']; //$this->dealthumb($dirroot."/public/img/".$data); //上傳失敗 if(!$data){ echo json_encode(array('status'=>0,'msg'=>"上傳失敗!")); }else{ //上傳成功 echo json_encode(array( 'name'=>$data, 'pic'=>base_url()."public/img/".$data, 'picthumb'=>$thumbdata == '' ?$data:$thumbdata )); } }
下面是前端的基本html代碼:
<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <link rel="stylesheet" href="/public/stylesheets/bootstrap.min.css" /> <link rel="stylesheet" href="/public/stylesheets/bootstrap-responsive.min.css" /> <link rel="stylesheet" href="/public/stylesheets/matrix-style.css" /> <link rel="stylesheet" href="/public/stylesheets/matrix-media.css" /> <script type="text/javascript" src="/public/javascripts/jquery.min.js"></script> <script type="text/javascript" src="/public/javascripts/jquery.form.js"></script> <script type="text/javascript" src="/public/javascripts/jquery.validate.js"></script> <style type="text/css"> body{background:#eeeeee; margin:0px;} </style> </head> <body> <div class="control-group"> <label class="control-label"> 分享logo: </label> <div class="controls"> <input type="file" name="sharepic" id="sharepic"/> <input type="hidden" name="act_sharepic" value="" id="act_sharepic"/>(<sapn class="fred">最佳大小為 80 X 80 像素</sapn>) <p style="margin:20px 0;"><img src="/public/img/default.png" alt="" id="sharepic_img"></p> </div> </div> <script type="text/javascript"> $(function () { /*****************圖片上傳部分開始 *******************/ var act = "<form class='myupload' action='"+"<?php echo site_url('mytest/uploadfile');?>"+"' method='post' enctype='multipart/form-data'></form>"; $("#sharepic").change(function(){ $(this).wrap(act); $(this).parent(".myupload").ajaxSubmit({ dataType: 'json', success: function(data) { var src = data.pic; //更改預覽圖像地址 $('#sharepic_img').attr("src",src); $('#act_sharepic').val(data.name); $('#sharepic').unwrap(); }, error:function(xhr){ alert(JSON.parse(xhr)); } }); }); }) </script> </body> </html>
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