Need help in ngImgCrop size

[thisisirfan]

i have used ngImgCrop plugin in 2 of my projects and it's working like a charm, Thanks to you. I really loved that plugin but currently i am dealing with different kind of a situation. I want to pass minimum and maximum size of image as well. Also height and width should be proportional to each other. For example if i am uploading an image of size 2mb, so it's height is 1500px and width is 2000px. I have imposed a limit of max height as 800px so width should automatically set according to height. How can i implement it using your plugin. Thanks in Advance