html5+exif.js+canvas

实现手机端照片上传预览、压缩、旋转功能。 //获取照片方向角属性，用户旋转控制 EXIF.getData(file, function() { // alert(EXIF.pretty(this)); EXIF.getAllTags(this); //alert(EXIF.getTag(this, 'Orientation')); Orientation = EXIF.getTag(this, 'Orientation'); //return; }); var base64 = null; var mpImg = new MegaPixImage(image); mpImg.render(canvas, { maxWidth: 800, maxHeight: 1200, quality: 0.8, orientation: Orientation }); base64 = canvas.toDataURL("image/jpeg", 0.8);

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2015-09-22 10:04  js\
     文件       30213  2015-09-22 10:04  js\exif.js
     文件      267775  2015-09-21 17:01  js\jquery-1.8.3.js
     文件        7151  2015-09-21 17:10  js\megapic-image.js
     目录           0  2015-09-21 17:01  js\uploadPicture\
     文件        9721  2015-09-21 17:01  js\uploadPicture\mobileBUGFix.mini.js
     文件        3961  2015-09-21 17:01  js\uploadPicture\upload.js
     文件        7335  2015-09-22 15:19  js\uploadPicture\uploadImage.js
     文件         867  2015-09-22 15:22  upload.html