Re: QPixmap Display RGB data
You have to convert a QImage to a QPixmap and set the new pixmap on the label or wherever you are displaying it. Things won't happen automatically - note that most of the relevant methods pass a copy of the pixmap.
Re: QPixmap Display RGB data
I don't know exactly what do you want and what are you doing know (pls describe your problem more clearly and maybe attach some code - if so, remember about [ CODE ] tags), but if you want to display a QPixmap then easy way is to set it to QLabel with QLabel::setPixmap() and than you can refresh it by callin update() on that label.