166 }

   167 

   168 /** Draw the list of available refit options.

   169  * Draw the list and highlight the selected refit option (if any)

   170  * @param *v vehicle(type) to get the refit-options of

   171  * @param sel selected refit cargo-type in the window

   172  * @return the cargo type that is hightlighted, CT_INVALID if none

   173  */

   174 CargoID DrawVehicleRefitWindow(const Vehicle *v, int sel)

   175 {

   176 	uint32 cmask;

   177 	CargoID cid, cargo = CT_INVALID;

   178 	int y = 25;

   179 #define show_cargo(ctype) { \

   180 		byte colour = 16; \

   181 		if (sel == 0) { \

   182 			cargo = ctype; \

   183 			colour = 12; \

   184 } \

   185 		sel--; \

   186 		DrawString(6, y, _cargoc.names_s[ctype], colour); \

   187 		y += 10; \

   188 }

   189 

   190 		/* Check if engine has custom refit or normal ones, and get its bitmasked value.

   191 		 * Now just and it with the bitmasked available cargo on the current landscape, and

   192 		* where the bits are set: those are available */

   193 		cmask = (_engine_refit_masks[v->engine_type] != 0) ? _engine_refit_masks[v->engine_type] : _default_refitmasks[v->type - VEH_Train];

   194 		cmask &= _landscape_global_cargo_mask[_opt_ptr->landscape];

   195 

   196 		/* Check which cargo has been selected from the refit window and draw list */

   197 		for (cid = 0; cmask != 0; cmask >>= 1, cid++) {

   198 			if (HASBIT(cmask, 0)) // vehicle is refittable to this cargo

   199 				show_cargo(_local_cargo_id_ctype[cid]);

   200 		}

   201 		return cargo;