void draw_filled_rect(const Vector& topleft, const Vector& size,
const Color& color, int layer);
void draw_filled_rect(const Rect& rect, const Color& color, int layer);
void draw_filled_rect(const Vector& topleft, const Vector& size,
const Color& color, int layer);
void draw_filled_rect(const Rect& rect, const Color& color, int layer);