使用javascript从浏览器中的流打印

I have an online viewer(popup) where Images are displayed in a div, along with some buttons to zoom in/out or rotate the image. Now I want to print the image programatically on certain user action. Is there any option to print just the from the browser or to print from a stream. I can't install extra plugins on the browser to accomplish this. If not printing an image directly, can I somehow print the image if I convert it into pdf before printing? I have tried finding a solution for this but the only thing I could find was javascript's window.print() function.The problem is that it will print the entire page including the buttons if I use it. I just want to print the image. I have an online viewer(popup) where Images are