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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file newgrf_engine.h Functions for NewGRF engines. */
#ifndef NEWGRF_ENGINE_H
#define NEWGRF_ENGINE_H
#include "direction_type.h"
#include "newgrf_callbacks.h"
#include "newgrf_properties.h"
#include "vehicle_type.h"
#include "engine_type.h"
#include "gfx_type.h"
#include "newgrf_spritegroup.h"
/** Resolver for a vehicle scope. */
struct VehicleScopeResolver : public ScopeResolver {
const struct Vehicle *v; ///< The vehicle being resolved.
EngineID self_type; ///< Type of the vehicle.
bool info_view; ///< Indicates if the item is being drawn in an info window.
/**
* Scope resolver of a single vehicle.
* @param ro Surrounding resolver.
* @param engine_type Engine type
* @param v %Vehicle being resolved.
* @param info_view Indicates if the item is being drawn in an info window.
*/
VehicleScopeResolver(ResolverObject &ro, EngineID engine_type, const Vehicle *v, bool info_view)
: ScopeResolver(ro), v(v), self_type(engine_type), info_view(info_view)
{
}
void SetVehicle(const Vehicle *v) { this->v = v; }
uint32 GetRandomBits() const override;
uint32 GetVariable(byte variable, uint32 parameter, bool *available) const override;
uint32 GetTriggers() const override;
};
/** Resolver for a vehicle (chain) */
struct VehicleResolverObject : public ResolverObject {
/** Application of 'wagon overrides'. */
enum WagonOverride {
WO_NONE, //!< Resolve no wagon overrides.
WO_UNCACHED, //!< Resolve wagon overrides.
WO_CACHED, //!< Resolve wagon overrides using TrainCache::cached_override.
WO_SELF, //!< Resolve self-override (helicopter rotors and such).
};
VehicleScopeResolver self_scope; ///< Scope resolver for the indicated vehicle.
VehicleScopeResolver parent_scope; ///< Scope resolver for its parent vehicle.
VehicleScopeResolver relative_scope; ///< Scope resolver for an other vehicle in the chain.
byte cached_relative_count; ///< Relative position of the other vehicle.
VehicleResolverObject(EngineID engine_type, const Vehicle *v, WagonOverride wagon_override, bool info_view = false,
CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) override;
const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const override;
};
static const uint TRAININFO_DEFAULT_VEHICLE_WIDTH = 29;
static const uint ROADVEHINFO_DEFAULT_VEHICLE_WIDTH = 32;
static const uint VEHICLEINFO_FULL_VEHICLE_WIDTH = 32;
struct VehicleSpriteSeq;
void SetWagonOverrideSprites(EngineID engine, CargoID cargo, const struct SpriteGroup *group, EngineID *train_id, uint trains);
const SpriteGroup *GetWagonOverrideSpriteSet(EngineID engine, CargoID cargo, EngineID overriding_engine);
void SetCustomEngineSprites(EngineID engine, byte cargo, const struct SpriteGroup *group);
void GetCustomEngineSprite(EngineID engine, const Vehicle *v, Direction direction, EngineImageType image_type, VehicleSpriteSeq *result);
#define GetCustomVehicleSprite(v, direction, image_type, result) GetCustomEngineSprite(v->engine_type, v, direction, image_type, result)
#define GetCustomVehicleIcon(et, direction, image_type, result) GetCustomEngineSprite(et, nullptr, direction, image_type, result)
void GetRotorOverrideSprite(EngineID engine, const struct Aircraft *v, bool info_view, EngineImageType image_type, VehicleSpriteSeq *result);
#define GetCustomRotorSprite(v, i, image_type, result) GetRotorOverrideSprite(v->engine_type, v, i, image_type, result)
#define GetCustomRotorIcon(et, image_type, result) GetRotorOverrideSprite(et, nullptr, true, image_type, result)
/* Forward declaration of GRFFile, to avoid unnecessary inclusion of newgrf.h
* elsewhere... */
struct GRFFile;
void SetEngineGRF(EngineID engine, const struct GRFFile *file);
uint16 GetVehicleCallback(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v);
uint16 GetVehicleCallbackParent(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v, const Vehicle *parent);
bool UsesWagonOverride(const Vehicle *v);
/* Handler to Evaluate callback 36. If the callback fails (i.e. most of the
* time) orig_value is returned */
uint GetVehicleProperty(const Vehicle *v, PropertyID property, uint orig_value);
uint GetEngineProperty(EngineID engine, PropertyID property, uint orig_value, const Vehicle *v = nullptr);
enum VehicleTrigger {
VEHICLE_TRIGGER_NEW_CARGO = 0x01,
/* Externally triggered only for the first vehicle in chain */
VEHICLE_TRIGGER_DEPOT = 0x02,
/* Externally triggered only for the first vehicle in chain, only if whole chain is empty */
VEHICLE_TRIGGER_EMPTY = 0x04,
/* Not triggered externally (called for the whole chain if we got NEW_CARGO) */
VEHICLE_TRIGGER_ANY_NEW_CARGO = 0x08,
/* Externally triggered for each vehicle in chain */
VEHICLE_TRIGGER_CALLBACK_32 = 0x10,
};
void TriggerVehicle(Vehicle *veh, VehicleTrigger trigger);
void UnloadWagonOverrides(Engine *e);
void AlterVehicleListOrder(EngineID engine, uint target);
void CommitVehicleListOrderChanges();
EngineID GetNewEngineID(const GRFFile *file, VehicleType type, uint16 internal_id);
#endif /* NEWGRF_ENGINE_H */
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