修复blob图像或内容而不使用Canvas - EXIF rotaion [英] Fix blob image orintaion without using Canvas - EXif rotaion

问题描述

我们有一些使用jquery进行图片上传和预览的代码。请看这个小提琴和代码。

https://jsfiddle.net/28v6vd23/1/

  function readURL（）{var fileList = this.files; var anyWindow = window.URL || window.webkitURL; var ValidImageTypes = [image / gif，image / jpeg，image / png]; for（var i = 0; i< fileList.length; i ++）{var file_allow = fileList [i]; var fileType = file_allow [type]; if（$ .inArray（fileType，ValidImageTypes）> 0）{var objectUrl = anyWindow.createObjectURL（fileList [i]）; var ran_x = Math.floor（（Math.random（）* 1000000000000）+ 1）; $（'。new'）。append（'< div class =my-img-divstyle =width：auto; display：inline-block;>< img src ='+ objectUrl +' class =my-imgid =/>< / div>'）; window.URL.revokeObjectURL（的fileList [I]）; }}} var inputfile = document.getElementById（inputFile）; inputfile.addEventListener（change，readURL，false）;  

 < script src =https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js>< / script>< form id =form1runat = 服务器 > < input type ='file'id =inputFile/> < / form>< div class =new>< / div>  

这里是图片正确预览的一些图片，


但是对于一些图片旋转90度。请检查这一点。

请检查此图片 https://drive.google.com/file/d/1UVW6dXMESAkeRFVxwBfsWWa4e9xD-DIL/view

我们如何解决这个问题？

更新

从 @qvotaxon 回答我可以理解 https://github.com/blueimp/JavaScript-Load-Image 这将有助于解决问题。但是当我看着这个时候，我正在为整合而苦苦挣扎。如果任何人都可以帮助与我当前的代码集成，那将非常有帮助。

谢谢

解决方案

在EXIF数据中。看看这篇文章 JS客户端Exif方向：旋转和镜像JPEG图像
寻求解决方案。

we have some code for image upload and preview using jquery .Please see this fiddle and code .

https://jsfiddle.net/28v6vd23/1/

 function readURL() { 
     var fileList = this.files;
     var anyWindow = window.URL || window.webkitURL;
     var ValidImageTypes = ["image/gif", "image/jpeg", "image/png"];
        
        
    for(var i = 0; i < fileList.length; i++){
			var file_allow = fileList[i];
      var fileType = file_allow["type"];
			if ($.inArray(fileType, ValidImageTypes) > 0) {
        var objectUrl = anyWindow.createObjectURL(fileList[i]);
		    var ran_x = Math.floor((Math.random() * 1000000000000) + 1);
		   $('.new').append('<div class="my-img-div" style="width:auto; display:inline-block;" ><img  src="' + objectUrl + '" class="my-img" id="" /></div>');
		  window.URL.revokeObjectURL(fileList[i]);
		  }
        }     
        
   }

  var inputfile= document.getElementById("inputFile");
  inputfile.addEventListener("change",readURL,false);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="form1" runat="server">
    <input type='file' id="inputFile" />
   
</form>

<div class="new">

</div>

here for some images the image is previewing correctly ,

but for some images it is rotating 90 degree. Please check this .

Please check with this image https://drive.google.com/file/d/1UVW6dXMESAkeRFVxwBfsWWa4e9xD-DIL/view

How we can solve this ?

UPDATE

From @qvotaxon answer i can understand that https://github.com/blueimp/JavaScript-Load-Image this will help to solve the problem . But when i look into this i am struggling with the integration . If anyone can help the integration with my current code it will be really helpful .

Thank you

解决方案

The orientation of the image is probably stored in the EXIF-data. Have a look at this post JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images for a solution.

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