1 /* $Id$ */

     2 

     3 #ifndef NEWGRF_CALLBACKS_H

     4 #define NEWGRF_CALLBACKS_H

     5 

     6 /** @file newgrf_callbacks.h

     7  */

     8 

     9 // This enum lists the implemented callbacks

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

    11 enum CallbackID {

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

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

    14 	CBID_WAGON_POWER = 0x10,

    15 

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

    17 	// only for train vehicles

    18 	CBID_VEH_LENGTH = 0x11,

    19 

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

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

    22 	CBID_REFIT_CAP = 0x15,

    23 

    24 	CBID_ARTIC_ENGINE = 0x16,

    25 };

    26 

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

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

    29 enum CallbackMask {

    30 	CBM_WAGON_POWER = 0,

    31 	CBM_VEH_LENGTH = 1,

    32 	CBM_REFIT_CAP = 3,

    33 	CBM_ARTIC_ENGINE = 4,

    34 };

    35 

    36 enum {

    37 	CALLBACK_FAILED = 0xFFFF

    38 };

    39 

    40 #endif /* NEWGRF_CALLBACKS_H */