/* create additional image buffers for double-buffering and cross-fading */
bitmap_db_cross = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
bitmap_db_field = CreateBitmap(FXSIZE, FYSIZE, DEFAULT_DEPTH);
/* create additional image buffers for double-buffering and cross-fading */
bitmap_db_cross = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
bitmap_db_field = CreateBitmap(FXSIZE, FYSIZE, DEFAULT_DEPTH);