[DllImport(Libraries.allegro_dll, CallingConvention = CallingConvention.Cdecl)] public static extern void al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT format);
[DllImport(Libraries.allegro_dll, CallingConvention = CallingConvention.Cdecl)] public static extern IntPtr al_lock_bitmap_region(IntPtr bitmap, int x, int y, int w, int h, ALLEGRO_PIXEL_FORMAT format, ALLEGRO_LOCK_FLAGS flags);