基于Html5的网页大头贴

Html5   2014-01-05 22:21:39 发布
您的评价:
     
0.0
收藏     0收藏
文件夹
标签
(多个标签用逗号分隔)
Html5技术越来越侵蚀着这个互联网,不得不承认,Html5所带来的改变还是很大的,一次偶然的机会,找到了Html5调用电脑摄像头的API,于是想到了做一个网页版大头贴来实现拍照与简单修改的功能,初期的版本还比较简单,大家可以看一下效果。saymagic.sinaapp.com/takephoto/。(注意,要用Chrome浏览器!!!)

好的,那接下来我就将介绍下这个的实现过程,代码已在GitHub上开源,后面会给出下载地址,先声明一下,该网站运行在sae平台上,所以图片的上传与存储在用sae的storage,所以下载下来若不是在sae上部署,就会有一些功能用不了,即使用sae的话也需要自己新建storage等,所以 copy党们注意一下。

这个的代码量还是不少的,首先,看一下主界面的代码吧,

    <!DOCTYPE html>  
    <!--[if lt IE 7 ]> <html lang="en" class="no-js ie6 lt8"> <![endif]-->  
    <!--[if IE 7 ]>    <html lang="en" class="no-js ie7 lt8"> <![endif]-->  
    <!--[if IE 8 ]>    <html lang="en" class="no-js ie8 lt8"> <![endif]-->  
    <!--[if IE 9 ]>    <html lang="en" class="no-js ie9"> <![endif]-->  
    <!--[if (gt IE 9)|!(IE)]><!--> <html lang="en" class="no-js"> <!--<![endif]-->  
        <head>  
            <meta charset="UTF-8" />  
            <!-- <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">  -->  
            <title>Login and Registration Form with HTML5 and CSS3 Demo</title>  
            <meta name="viewport" content="width=device-width, initial-scale=1.0">   
            <meta name="description" content="Login and Registration Form with HTML5 and CSS3" />  
            <meta name="keywords" content="html5, css3, form, switch, animation, :target, pseudo-class" />  
            <link rel="stylesheet" type="text/css" href="css/demo.css" />  
            <link rel="stylesheet" type="text/css" href="css/style2.css" />  
            <link rel="stylesheet" type="text/css" href="css/animate-custom.css" />  
            <script type="text/javascript" src="js/jquery-1.8.3.js"></script>  
            <script type="text/javascript" src="js/jquery.popImage.mini.js"></script>     
            <link href="index.css" rel="stylesheet" type="text/css">  
            <script language="javascript">  
    window.addEventListener("DOMContentLoaded", function() {  
        var timer;  
        var canvas = document.getElementById("canvas"),  
        context = canvas.getContext("2d"),  
            video = document.getElementById("video"),  
            videoObj = { "video": true },  
            errBack = function(error) {  
                console.log("Video capture error: ", error.code);   
            };  
        if(navigator.getUserMedia) { // Standard  
            navigator.getUserMedia(videoObj, function(stream) {  
                video.src = stream;  
                video.play();  
            }, errBack);  
        } else if(navigator.webkitGetUserMedia) { // WebKit-prefixed  
            navigator.webkitGetUserMedia(videoObj, function(stream){  
                video.src = window.webkitURL.createObjectURL(stream);  
                video.play();  
            }, errBack);  
        }  
        document.getElementById("snap").addEventListener("click", function() {  
            clearTimeout(timer);  
            video.pause();  
        });  
        document.getElementById("rephotograph").addEventListener("click", function() {  
            clearTimeout(timer);  
            video.play();  
        });  
        document.getElementById("autophotograph").addEventListener("click",function(){  
            video.play();  
            timer = setTimeout(function(){    
                video.pause();  
            },3000);  
        });  
        document.getElementById("change").addEventListener("click", function() {  
            context.drawImage(video, 0, 0, 440, 330);  
        });  
      
        var saveFile = function(data, filename) {  
            var save_link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');  
            save_link.href = data;  
            save_link.download = filename;  
            var event = document.createEvent('MouseEvents');  
            event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);  
            save_link.dispatchEvent(event);  
        };  
        document.getElementById("download").addEventListener("click", function() {  
            var myCanvas = document.getElementById("canvas");    
      
            var image = myCanvas.toDataURL("image/png").replace("image/png", "image/octet-stream");     
            var filename = 'paint_' + (new Date()).getTime() + '.png';  
            saveFile(image,filename);  
            // window.location.href=image; // it will save locally    
        });  
    }, false);  
      
    </script>  
        </head>  
        <body>  
            <div class="container" id="container">  
                <section>               
                    <div id="container_demo" >  
                        <!-- hidden anchor to stop jump http://www.css3create.com/Astuce-Empecher-le-scroll-avec-l-utilisation-de-target#wrap4  -->  
                        <a class="hiddenanchor" id="toregister"></a>                                  
      
                        <a class="hiddenanchor" id="tologin"></a>  
                        <div id="wrapper">  
      
                            <div id="login" class="animate form">  
                                <h1>自拍一下</h1>  
                                    <div>  
                                    <video id="video" width="440" height="330" autoplay></video>  
                                    </div>  
                                        <a id="snap" class="normal_button">拍照</a>  
                                        <a id="autophotograph" class="normal_button">5秒后自动拍摄</a>  
                                        <a id="rephotograph" class="normal_button">重拍</a>  
                                        <a href="#toregister" id="change" class="to_register">修改</a>  
            <a href="http://www.sae.sina.com.cn">sae站点</a>  
      
                            </div>  
                           <div id="register" class="animate form">  
                                    <h1> 修改一下</h1>   
                                     <canvas id="canvas" name="mypic" width="440" height="330"></canvas>  
                         <div id="chooseColor"></div>  
                                    <div id="chooseSize"></div><br><br>  
                                    <div>  
                                    <a id="download" class="normal_button">下载到本地</a>  
                                    <a id="share" class="normal_button">分享到本网站</a>  
                                    <a href="paint/show.php" class="to_register" target="_blank"> 查看他人分享 </a>  
                                    <a href="#tologin" class="to_register"> 重新拍摄 </a>  
                                                <a href="http://www.sae.sina.com.cn">sae站点</a>  
                                    </div>  
                            </div>          
                        </div>  
                    </div>    
                </section>  
            </div>  
        </body>  
        <script type="text/javascript" src="index.js"></script>  
        <script>  
      
    </script>  
    </html>  
body 部分定义了这个页面的布局,具体的css就不再将了,主要由两个div组成,一个拍照的div与修改的div,里面定义了一些href连接,主要说的是 script部分,这部分就是实现拍照的主要代码,我在拍照里定义了video标签,使得你可以通过摄像头看见自己动的时候电脑里的头像也在动,而对于拍照的话,你只需让video上的流pause就可以了。
就可以了,好的,基本原理就是这样,说一下每个连接按钮对应的具体代码。

1.拍照:(index.html)

    document.getElementById("snap").addEventListener("click", function() {  
        clearTimeout(timer);  
        video.pause();  
    });  
2.五秒后延迟拍照:(index.html)
    document.getElementById("autophotograph").addEventListener("click",function(){  
        video.play();  
        timer = setTimeout(function(){    
            video.pause();  
        },5000);  
    });  

3. 重拍:(index.html)
    document.getElementById("rephotograph").addEventListener("click", function() {  
        clearTimeout(timer);  
        video.play();  
    });  

4.修改:(index.html)
    document.getElementById("change").addEventListener("click", function() {  
        context.drawImage(video, 0, 0, 440, 330);  
    });  

5.sae站点(index.html)

啊哦~~link连接==

 <a href="http://www.sae.sina.com.cn">sae站点</a>  

6.下载到本地(index.js)
    $("#download").click(function() {  
        var myCanvas = document.getElementById("canvas");  
        var image = myCanvas.toDataURL("image/png").replace("image/png", "image/octet-stream");  
        // window.location.href=image;  
        var filename = 'paint_' + (new Date()).getTime() + '.png';  
        //saveFile(image, filename);  
          
        var save_link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');  
        save_link.href = image;  
        save_link.download = filename;  
        var event = document.createEvent('MouseEvents');  
        event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);  
      //  save_link.dispatchEvent(event);  
    });  

    7.分享到本站(index.js):ps把图片流上传到sae的stoarge里。
    document.getElementById("share").onclick=function(){  
          //Ajax提交数据  
          var xhr=new XMLHttpRequest;  
          xhr.open("POST","upload.php",true);  
          xhr.onreadystatechange=function(){  
            if(xhr.readyState!=4)return;  
          };  
          //从canvas中获取DataURL并发送  
          xhr.send(canvas.toDataURL());  
             alert("分享成功!");  
        };  

8.查看他人分享:(paint/show.php)

        这个就是一个连接到paint/show.php页面,但是生成这个页面还是有些难度,如果使用本地文件来存储的话可以遍历图片文件下的所有图片,如果想做高级一点的话就可以实现动态加载,这个是遍历sae的一个stoarge上的所有图片,代码如下:

    <?php  
    $fileTypes = array('jpg','jpeg','gif','png');  
    $width = 200;  
    $height = 200;  
    $pageTitle = "Pictures";  
        
    // *************************************************************  
      $s = new SaeStorage();  
    $domain = 'takephoto';//我刚创建的domain的名称  
      
    $filelist = $s->getList($domain,"",100);  
      
    $f = join(',*.', $fileTypes);  
    $f = '*.'.$f;  
    $height += 20;  
    ?>  
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">  
      <head>  
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />  
        <title><?php echo $pageTitle; ?></title>  
        <script type="text/javascript" src="../js/jquery-1.8.3.js"></script>  
        <script type="text/javascript" src="../js/jquery.popImage.mini.js"></script>  
        <link rel="stylesheet" type="text/css" href="../css/popImage.css" />    
    <style type="text/css">  
    <!--  
    * { margin:0; padding:0; }  
    h1 { background:#eee; font-weight:normal; padding:3px 5px; font-size:medium; }  
    ul { margin-top:10px; list-style:none; }  
    ul li { width:<?php echo $width; ?>px; height:<?php echo $height; ?>px; float:left; padding:5px; overflow:hidden; margin-bottom:10px; }  
    ul li span { height:20px; font-size:medium; font-style:italic; }  
    ul li a img { width:<?php echo $width; ?>px; border:dotted 1px #ddd; }  
      
    }  
    -->  
    </style>  
      </head>  
      <body>  
        <ul>  
    <?php $loop = 1; foreach($filelist as $name) { ?>  
          <li>  
            <span><?php echo $loop; ?></span>  
            <a href="<?php echo $s->getUrl($domain,$name); ?>" target="_blank" rel="gallery" class="image_gall"><img alt="<?php echo $s->getUrl($domain,$name); ?>" src="<?php echo $s->getUrl($domain,$name); ?>" /></a>  
          </li>  
    <?php $loop++; } ?>  
        </ul>  
        <script>  
        $(function(){  
            $("a.image_gall").popImage();  
            })  
    </script>  
      </body>  
    </html>  

说一下,图片的展开效果用的是popImage,简单却实用的小工具。

最后,GitHub的下载地址。https://github.com/saymagic/takephoto。有什么问题欢迎提出,若有改进,也欢迎大家多多开源。

来自:http://blog.csdn.net/saymagic/article/details/17782903

扩展阅读

基于html5 Canvas 的画图程序:Painter
基于HTML5的CSS框架组件BootFlat
基于html5 Canvas 的画图程序
基于HTML5的幻灯片 html5slides
基于HTML5的图形库 ichartjs

为您推荐

JQuery上传插件Uploadify使用详解
HTML5 打开摄像头
Video.js简单使用
WEB前端规范
JavaScript进阶学习(三)—— 基于html5 File API的文件操作

更多

Html5
HTML5
相关文档  — 更多
相关经验  — 更多
相关讨论  — 更多