GdkVisual

class GdkVisual 
{
    bits_per_rgb; 
    blue_mask; 
    blue_prec; 
    blue_shift; 
    byte_order; 
    colormap_size; 
    depth; 
    green_mask; 
    green_prec; 
    green_shift; 
    red_mask; 
    red_prec; 
    red_shift; 
    type; 
}