rect_base
typedef rect_base<T> self_type;
rect_base() {}
rect_base(T x1_, T y1_, T x2_, T y2_) :
typedef rect_base<int> rect_i; //----rect_i
typedef rect_base<float> rect_f; //----rect_f
typedef rect_base<double> rect_d; //----rect_d
const rect_base<T>& clip_box,
const rect_base<T>& clip_box)
inline unsigned clipping_flags(T x, T y, const rect_base<T>& clip_box)
inline unsigned clipping_flags_x(T x, const rect_base<T>& clip_box)
inline unsigned clipping_flags_y(T y, const rect_base<T>& clip_box)
const rect_base<T>& clip_box,
typedef rect_base<coord_type> rect_type;