Support QPixmaps / QImages in style sheets

I would like to have the possibilty to use QPixmaps (QIcons) or QImages in style sheets in an easy way - without having to save such a resource to disk and load it with url(file). The point of this would be that you can modify an image and use that in stylesheets directely;

QPixmap p = some pixmap;
widget->setStyleSheet("QWidget

");