Camera Overlay Behind Widgets

[praki]

Hii.... I am new to qt. I want to develop an application where i am using QCamera to capture image. But the thing is i want to add some frames like .png or .jpg to it(like an overlay type) and then capture the new image with frames. And i want to do this in C++ Gui and not in QML. I have googled, but could'nt get the desired result. Anyone can help.. Thanks in advance

Check out the sample image