- draw_line(fe, x1-1, y1, x2-1, y2, COL_WIRE);
- draw_line(fe, x1+1, y1, x2+1, y2, COL_WIRE);
- draw_line(fe, x1, y1-1, x2, y2-1, COL_WIRE);
- draw_line(fe, x1, y1+1, x2, y2+1, COL_WIRE);
- draw_line(fe, x1, y1, x2, y2, colour);
+ draw_line(dr, x1-1, y1, x2-1, y2, COL_WIRE);
+ draw_line(dr, x1+1, y1, x2+1, y2, COL_WIRE);
+ draw_line(dr, x1, y1-1, x2, y2-1, COL_WIRE);
+ draw_line(dr, x1, y1+1, x2, y2+1, COL_WIRE);
+ draw_line(dr, x1, y1, x2, y2, colour);