static void update_windows (struct WinMeta *, struct Win *);
static void destroy_window (struct Win *);
static void draw_windows_borders (struct Win *, struct Win *, struct Corners *, uint16_t);
static void update_windows (struct WinMeta *, struct Win *);
static void destroy_window (struct Win *);
static void draw_windows_borders (struct Win *, struct Win *, struct Corners *, uint16_t);