+void DrawScreenElementExt(int, int, int, int, int, int, int);
+void DrawLevelElementExt(int, int, int, int, int, int, int);
+void DrawScreenElementShifted(int, int, int, int, int, int);
+void DrawLevelElementShifted(int, int, int, int, int, int);
+void DrawScreenElementThruMask(int, int, int);
+void DrawLevelElementThruMask(int, int, int);
+void DrawLevelFieldThruMask(int, int);