Type conversions

["MERT TUGCU" <merttugcu hotmail com>]

Hi everyone,

I am trying to use X11 library to draw incoming video frames to a drawing 
area. I have found out that Gdk::Pixbuf::render_to_drawable method is very 
slow to draw the incoming frames. The first thing to do is to query your 
video adapter in X11. The function prototype is:
XvQueryAdaptors(Display*, Window*, int, XvAdaptorInfo). However, I don't 
know how to make the type conversions. I have created a class for my drawing 
area like as follows:
class CustomDrawingArea : public Gtk::DrawingArea
Next I've creat an object from this class and add it to my GUI. In order to 
get the display and the window I used:
Window* window = (Window*)(drawingarea->get_window()); //drawingarea is the 
object from the above class
Of course this didn't work out. get_window() method returns 
Glib::RefPtr<Gdk::Window> and this does not match to Window class in X11. 
Would you please tell me how to make this type conversion or am I completely 
doing something wrong? I really have to use the X11 library to draw fast. 
Thank you very much for your response and your time.