CropImage

类似facebook图片裁剪，裁切区域自定义，图片大小任意，保证图片宽高比，支持缩放、拖动

Demo

http://sandbox.runjs.cn/show/uqfwtnpj

#使用方法 var crop = new CropImage({ realWidth: 500, realHeight: 300, imageSrc: "https://scontent-sjc.xx.fbcdn.net/hphotos-xpf1/t31.0-8/11082173_1375191982809420_8824827256454539423_o.jpg" });

document.appendChild(div, crop.domNode);
crop.startup();

//{
//w:
//h:
//}
var currentImageSize = crop.getImageSize();

//{
//l:
//t:
//w:
//h:
//}
var cropSize = crop.getCropSize();