extern int mScrollX_last, mScrollY_last;
-extern void InitScrollPlayfield(void);
-extern void UpdatePlayfield(boolean);
-extern void RestorePlayfield(void);
+void InitScrollPlayfield(void);
+void UpdatePlayfield(boolean);
+void RestorePlayfield(void);
-extern void DDScrollBuffer_ScrollTo(int X, int Y);
-extern void DDScrollBuffer_ScrollTowards(int X, int Y, double Step);
-extern void DDScrollBuffer_SoftScrollTo(int X, int Y, int TimeMS, int FPS);
+void DDScrollBuffer_ScrollTo(int X, int Y);
+void DDScrollBuffer_ScrollTowards(int X, int Y, double Step);
+void DDScrollBuffer_SoftScrollTo(int X, int Y, int TimeMS, int FPS);
-#endif /* DDSCROLLBUFFER_H */
+#endif // DDSCROLLBUFFER_H