/* $Id$ */

#ifndef NEWGRF_CALLBACKS_H

#define NEWGRF_CALLBACKS_H

/** @file newgrf_callbacks.h

 */

// This enum lists the implemented callbacks

// Use as argument for the GetCallBackResult function (see comments there)

enum CallbackID {

	// Powered wagons, if the result is lower as 0x40 then the wagon is powered

	// TODO: interpret the rest of the result, aka "visual effects"

	CBID_WAGON_POWER = 0x10,

	// Vehicle length, returns the amount of 1/8's the vehicle is shorter

	// only for train vehicles

	CBID_VEH_LENGTH = 0x11,

	// Refit capacity, the passed vehicle needs to have its ->cargo_type set to

	// the cargo we are refitting to, returns the new cargo capacity

	CBID_REFIT_CAP = 0x15,

	CBID_ARTIC_ENGINE = 0x16,

};

// bit positions for rvi->callbackmask, indicates which callbacks are used by an engine

// (some callbacks are always used, and dont appear here)

enum CallbackMask {

	CBM_WAGON_POWER = 0,

	CBM_VEH_LENGTH = 1,

	CBM_REFIT_CAP = 3,

	CBM_ARTIC_ENGINE = 4,

};

enum {

	CALLBACK_FAILED = 0xFFFF

};

#endif /* NEWGRF_CALLBACKS_H */

#include "newgrf_callbacks.h"

#include "newgrf_callbacks.h"