int draw_deactivation_mask;
int draw_background_mask;
+ boolean drawing_area_changed;
+
Bitmap *field_save_buffer;
Bitmap *background_bitmap;
void ClearRectangleOnBackground(Bitmap *, int, int, int, int);
void BlitBitmapMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
boolean DrawingOnBackground(int, int);
+boolean DrawingAreaChanged();
void BlitBitmapOnBackground(Bitmap *, Bitmap *, int, int, int, int, int, int);
void DrawSimpleBlackLine(Bitmap *, int, int, int, int);
void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);