boolean el_diamond_caves;
boolean el_dx_boulderdash;
boolean el_chars;
+ boolean el_steelchars;
boolean el_custom;
boolean el_user_defined;
boolean el_dynamic;
boolean el_dc;
boolean el_dx;
boolean el_chars;
+ boolean el_steelchars;
boolean el_ce;
boolean el_ge;
boolean el_ref;
void InitGfxScrollbufferInfo(int, int);
void SetDrawDeactivationMask(int);
void SetDrawBackgroundMask(int);
+void SetWindowBackgroundBitmap(Bitmap *);
void SetMainBackgroundBitmap(Bitmap *);
void SetDoorBackgroundBitmap(Bitmap *);