src/newgrf_engine.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file newgrf_engine.h Functions for NewGRF engines. */
  11
  12 #ifndef NEWGRF_ENGINE_H
  13 #define NEWGRF_ENGINE_H
  14
  15 #include "direction_type.h"
  16 #include "newgrf_callbacks.h"
  17 #include "newgrf_properties.h"
  18 #include "vehicle_type.h"
  19 #include "engine_type.h"
  20 #include "gfx_type.h"
  21 #include "newgrf_spritegroup.h"
  22
  23 /** Resolver for a vehicle scope. */
  24 struct VehicleScopeResolver : public ScopeResolver {
  25         ResolverObject &ro;      ///< Surrounding resolver object.
  26
  27         const struct Vehicle *v; ///< The vehicle being resolved.
  28         EngineID self_type;      ///< Type of the vehicle.
  29         bool info_view;          ///< Indicates if the item is being drawn in an info window.
  30
  31         VehicleScopeResolver(ResolverObject &ro, EngineID engine_type, const Vehicle *v, bool info_view);
  32
  33         void SetVehicle(const Vehicle *v) { this->v = v; }
  34
  35         /* virtual */ uint32 GetRandomBits() const;
  36         /* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
  37         /* virtual */ uint32 GetTriggers() const;
  38         /* virtual */ void SetTriggers(int triggers) const;
  39 };
  40
  41 /** Resolver for a vehicle (chain) */
  42 struct VehicleResolverObject : public ResolverObject {
  43         VehicleScopeResolver self_scope;     ///< Scope resolver for the indicated vehicle.
  44         VehicleScopeResolver parent_scope;   ///< Scope resolver for its parent vehicle.
  45
  46         VehicleScopeResolver relative_scope; ///< Scope resolver for an other vehicle in the chain.
  47         byte cached_relative_count;          ///< Relative position of the other vehicle.
  48
  49         VehicleResolverObject (EngineID engine_type, const Vehicle *v, bool info_view = false,
  50                         CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
  51
  52         /* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0);
  53
  54         /* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
  55 };
  56
  57 static const uint TRAININFO_DEFAULT_VEHICLE_WIDTH   = 29;
  58 static const uint ROADVEHINFO_DEFAULT_VEHICLE_WIDTH = 32;
  59 static const uint VEHICLEINFO_FULL_VEHICLE_WIDTH    = 32;
  60
  61 struct VehicleSpriteSeq;
  62
  63 void SetWagonOverrideSprites(EngineID engine, CargoID cargo, const struct SpriteGroup *group, EngineID *train_id, uint trains);
  64 const SpriteGroup *GetWagonOverrideSpriteSet(EngineID engine, CargoID cargo, EngineID overriding_engine);
  65 void SetCustomEngineSprites(EngineID engine, byte cargo, const struct SpriteGroup *group);
  66
  67 void GetCustomEngineSprite(EngineID engine, const Vehicle *v, Direction direction, EngineImageType image_type, VehicleSpriteSeq *result);
  68 #define GetCustomVehicleSprite(v, direction, image_type, result) GetCustomEngineSprite(v->engine_type, v, direction, image_type, result)
  69 #define GetCustomVehicleIcon(et, direction, image_type, result) GetCustomEngineSprite(et, NULL, direction, image_type, result)
  70
  71 void GetRotorOverrideSprite(EngineID engine, const struct Aircraft *v, bool info_view, EngineImageType image_type, VehicleSpriteSeq *result);
  72 #define GetCustomRotorSprite(v, i, image_type, result) GetRotorOverrideSprite(v->engine_type, v, i, image_type, result)
  73 #define GetCustomRotorIcon(et, image_type, result) GetRotorOverrideSprite(et, NULL, true, image_type, result)
  74
  75 /* Forward declaration of GRFFile, to avoid unnecessary inclusion of newgrf.h
  76  * elsewhere... */
  77 struct GRFFile;
  78
  79 void SetEngineGRF(EngineID engine, const struct GRFFile *file);
  80
  81 uint16 GetVehicleCallback(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v);
  82 uint16 GetVehicleCallbackParent(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v, const Vehicle *parent);
  83 bool UsesWagonOverride(const Vehicle *v);
  84
  85 /* Handler to Evaluate callback 36. If the callback fails (i.e. most of the
  86  * time) orig_value is returned */
  87 uint GetVehicleProperty(const Vehicle *v, PropertyID property, uint orig_value);
  88 uint GetEngineProperty(EngineID engine, PropertyID property, uint orig_value, const Vehicle *v = NULL);
  89
  90 enum VehicleTrigger {
  91         VEHICLE_TRIGGER_NEW_CARGO     = 0x01,
  92         /* Externally triggered only for the first vehicle in chain */
  93         VEHICLE_TRIGGER_DEPOT         = 0x02,
  94         /* Externally triggered only for the first vehicle in chain, only if whole chain is empty */
  95         VEHICLE_TRIGGER_EMPTY         = 0x04,
  96         /* Not triggered externally (called for the whole chain if we got NEW_CARGO) */
  97         VEHICLE_TRIGGER_ANY_NEW_CARGO = 0x08,
  98         /* Externally triggered for each vehicle in chain */
  99         VEHICLE_TRIGGER_CALLBACK_32   = 0x10,
 100 };
 101 void TriggerVehicle(Vehicle *veh, VehicleTrigger trigger);
 102
 103 void UnloadWagonOverrides(Engine *e);
 104
 105 void AlterVehicleListOrder(EngineID engine, uint target);
 106 void CommitVehicleListOrderChanges();
 107
 108 EngineID GetNewEngineID(const GRFFile *file, VehicleType type, uint16 internal_id);
 109
 110 #endif /* NEWGRF_ENGINE_H */