int w() 
        %code%{  RETVAL = THIS->w;
                %};
    int h() 
        %code%{  RETVAL = THIS->h;
                %};
    int bpp() 
        %code%{  RETVAL = THIS->bpp;
                %};
    int refresh() 
        %code%{  RETVAL = THIS->refresh;
                %};