Context(ContextType type)
{
PlatformServices.Initialize ();
this.type = type;
if (screen_create_context (out handle, type) != 0) {
// TODO: read errno to describe problem
throw new Exception ("Unable to create screen context");
}
screen_request_events (handle);
eventDomain = screen_get_domain ();
PlatformServices.AddEventHandler (eventDomain, HandleEvent);
}