I want to port a desktop application developed using VTK, C++ and QT to web application

I want to port a desktop application developed using VTK, C++ and QT to web application.The glitch is that i want to do it using c++ because i don't want to loose performance of application.Is it possible to do that.And if it is then please suggest me some tools,libraries as well as best approach. And i would be highly thankful if somebody could share me proper tutorial or working example.