-#if defined(TARGET_X11)
-/* on old-style, classic and potentially slow graphics systems, redraw single
- tiles instead of the whole playfield unless a certain threshold is reached;
- when using the X11 target, this method should still be fast on all systems */
-#define REDRAWTILES_THRESHOLD (SCR_FIELDX * SCR_FIELDY / 2)
-#else
-/* on modern graphics systems and when using the SDL target, this tile redraw