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/* $Id$ */

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/** @file newgrf_engine.h Functions for NewGRF engines. */

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#ifndef NEWGRF_ENGINE_H

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#define NEWGRF_ENGINE_H

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#include "newgrf.h"

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#include "direction_type.h"

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#include "newgrf_cargo.h"

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extern int _traininfo_vehicle_pitch;

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extern int _traininfo_vehicle_width;

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void SetWagonOverrideSprites(EngineID engine, CargoID cargo, const struct SpriteGroup *group, EngineID *train_id, uint trains);

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const SpriteGroup *GetWagonOverrideSpriteSet(EngineID engine, CargoID cargo, EngineID overriding_engine);

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void SetCustomEngineSprites(EngineID engine, byte cargo, const struct SpriteGroup *group);

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SpriteID GetCustomEngineSprite(EngineID engine, const Vehicle* v, Direction direction);

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SpriteID GetRotorOverrideSprite(EngineID engine, const Vehicle* v, bool info_view);

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#define GetCustomRotorSprite(v, i) GetRotorOverrideSprite(v->engine_type, v, i)

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#define GetCustomRotorIcon(et) GetRotorOverrideSprite(et, NULL, true)

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/* Forward declaration of GRFFile, to avoid unnecessary inclusion of newgrf.h

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 * elsewhere... */

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struct GRFFile;

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void SetEngineGRF(EngineID engine, const struct GRFFile *file);

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const struct GRFFile *GetEngineGRF(EngineID engine);

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uint32 GetEngineGRFID(EngineID engine);

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uint16 GetVehicleCallback(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v);

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uint16 GetVehicleCallbackParent(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v, const Vehicle *parent);

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bool UsesWagonOverride(const Vehicle *v);

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#define GetCustomVehicleSprite(v, direction) GetCustomEngineSprite(v->engine_type, v, direction)

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#define GetCustomVehicleIcon(et, direction) GetCustomEngineSprite(et, NULL, direction)

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/* Handler to Evaluate callback 36. If the callback fails (i.e. most of the

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 * time) orig_value is returned */

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uint GetVehicleProperty(const Vehicle *v, uint8 property, uint orig_value);

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uint GetEngineProperty(EngineID engine, uint8 property, uint orig_value);

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enum VehicleTrigger {

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	VEHICLE_TRIGGER_NEW_CARGO     = 0x01,

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	/* Externally triggered only for the first vehicle in chain */

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	VEHICLE_TRIGGER_DEPOT         = 0x02,

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	/* Externally triggered only for the first vehicle in chain, only if whole chain is empty */

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	VEHICLE_TRIGGER_EMPTY         = 0x04,

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	/* Not triggered externally (called for the whole chain if we got NEW_CARGO) */

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	VEHICLE_TRIGGER_ANY_NEW_CARGO = 0x08,

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	/* Externally triggered for each vehicle in chain */

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	VEHICLE_TRIGGER_CALLBACK_32   = 0x10,

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};

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void TriggerVehicle(Vehicle *veh, VehicleTrigger trigger);

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void UnloadWagonOverrides(Engine *e);

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uint ListPositionOfEngine(EngineID engine);

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void AlterRailVehListOrder(EngineID engine, EngineID target);

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void CommitRailVehListOrderChanges();

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EngineID GetNewEngineID(const GRFFile *file, VehicleType type, uint16 internal_id);

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#endif /* NEWGRF_ENGINE_H */