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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_station.h Header file for NewGRF stations */
#ifndef NEWGRF_STATION_H
#define NEWGRF_STATION_H
#include "newgrf_animation_type.h"
#include "newgrf_callbacks.h"
#include "newgrf_class.h"
#include "newgrf_commons.h"
#include "cargo_type.h"
#include "station_type.h"
#include "rail_type.h"
#include "newgrf_spritegroup.h"
#include "newgrf_town.h"
/** Scope resolver for stations. */
struct StationScopeResolver : public ScopeResolver {
TileIndex tile; ///< %Tile of the station.
struct BaseStation *st; ///< Instance of the station.
const struct StationSpec *statspec; ///< Station (type) specification.
CargoID cargo_type; ///< Type of cargo of the station.
Axis axis; ///< Station axis, used only for the slope check callback.
/**
* Constructor for station scopes.
* @param ro Surrounding resolver.
* @param statspec Station (type) specification.
* @param st Instance of the station.
* @param tile %Tile of the station.
*/
StationScopeResolver(ResolverObject &ro, const StationSpec *statspec, BaseStation *st, TileIndex tile)
: ScopeResolver(ro), tile(tile), st(st), statspec(statspec), cargo_type(CT_INVALID), axis(INVALID_AXIS)
{
}
uint32 GetRandomBits() const override;
uint32 GetTriggers() const override;
uint32 GetVariable(byte variable, uint32 parameter, bool *available) const override;
};
/** Station resolver. */
struct StationResolverObject : public ResolverObject {
StationScopeResolver station_scope; ///< The station scope resolver.
TownScopeResolver *town_scope; ///< The town scope resolver (created on the first call).
StationResolverObject(const StationSpec *statspec, BaseStation *st, TileIndex tile,
CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
~StationResolverObject();
TownScopeResolver *GetTown();
ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) override
{
switch (scope) {
case VSG_SCOPE_SELF:
return &this->station_scope;
case VSG_SCOPE_PARENT: {
TownScopeResolver *tsr = this->GetTown();
if (tsr != nullptr) return tsr;
FALLTHROUGH;
}
default:
return ResolverObject::GetScope(scope, relative);
}
}
const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const override;
};
enum StationClassID : byte {
STAT_CLASS_BEGIN = 0, ///< the lowest valid value
STAT_CLASS_DFLT = 0, ///< Default station class.
STAT_CLASS_WAYP, ///< Waypoint class.
STAT_CLASS_MAX = 255, ///< Maximum number of classes.
};
template <> struct EnumPropsT<StationClassID> : MakeEnumPropsT<StationClassID, byte, STAT_CLASS_BEGIN, STAT_CLASS_MAX, STAT_CLASS_MAX, 8> {};
/** Allow incrementing of StationClassID variables */
DECLARE_POSTFIX_INCREMENT(StationClassID)
enum StationSpecFlags {
SSF_SEPARATE_GROUND, ///< Use different sprite set for ground sprites.
SSF_DIV_BY_STATION_SIZE, ///< Divide cargo amount by station size.
SSF_CB141_RANDOM_BITS, ///< Callback 141 needs random bits.
SSF_CUSTOM_FOUNDATIONS, ///< Draw custom foundations.
SSF_EXTENDED_FOUNDATIONS, ///< Extended foundation block instead of simple.
};
/** Randomisation triggers for stations */
enum StationRandomTrigger {
SRT_NEW_CARGO, ///< Trigger station on new cargo arrival.
SRT_CARGO_TAKEN, ///< Trigger station when cargo is completely taken.
SRT_TRAIN_ARRIVES, ///< Trigger platform when train arrives.
SRT_TRAIN_DEPARTS, ///< Trigger platform when train leaves.
SRT_TRAIN_LOADS, ///< Trigger platform when train loads/unloads.
SRT_PATH_RESERVATION, ///< Trigger platform when train reserves path.
};
/* Station layout for given dimensions - it is a two-dimensional array
* where index is computed as (x * platforms) + platform. */
typedef byte *StationLayout;
/** Station specification. */
struct StationSpec {
/**
* Properties related the the grf file.
* NUM_CARGO real cargo plus three pseudo cargo sprite groups.
* Used for obtaining the sprite offset of custom sprites, and for
* evaluating callbacks.
*/
GRFFilePropsBase<NUM_CARGO + 3> grf_prop;
StationClassID cls_id; ///< The class to which this spec belongs.
StringID name; ///< Name of this station.
/**
* Bitmask of number of platforms available for the station.
* 0..6 correspond to 1..7, while bit 7 corresponds to >7 platforms.
*/
byte disallowed_platforms;
/**
* Bitmask of platform lengths available for the station.
* 0..6 correspond to 1..7, while bit 7 corresponds to >7 tiles long.
*/
byte disallowed_lengths;
/**
* Number of tile layouts.
* A minimum of 8 is required is required for stations.
* 0-1 = plain platform
* 2-3 = platform with building
* 4-5 = platform with roof, left side
* 6-7 = platform with roof, right side
*/
uint tiles;
NewGRFSpriteLayout *renderdata; ///< Array of tile layouts.
/**
* Cargo threshold for choosing between little and lots of cargo
* @note little/lots are equivalent to the moving/loading states for vehicles
*/
uint16 cargo_threshold;
CargoTypes cargo_triggers; ///< Bitmask of cargo types which cause trigger re-randomizing
byte callback_mask; ///< Bitmask of station callbacks that have to be called
byte flags; ///< Bitmask of flags, bit 0: use different sprite set; bit 1: divide cargo about by station size
byte pylons; ///< Bitmask of base tiles (0 - 7) which should contain elrail pylons
byte wires; ///< Bitmask of base tiles (0 - 7) which should contain elrail wires
byte blocked; ///< Bitmask of base tiles (0 - 7) which are blocked to trains
AnimationInfo animation;
byte lengths;
byte *platforms;
StationLayout **layouts;
bool copied_layouts;
};
/** Struct containing information relating to station classes. */
typedef NewGRFClass<StationSpec, StationClassID, STAT_CLASS_MAX> StationClass;
const StationSpec *GetStationSpec(TileIndex t);
/* Evaluate a tile's position within a station, and return the result a bitstuffed format. */
uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred);
SpriteID GetCustomStationRelocation(const StationSpec *statspec, BaseStation *st, TileIndex tile, uint32 var10 = 0);
SpriteID GetCustomStationFoundationRelocation(const StationSpec *statspec, BaseStation *st, TileIndex tile, uint layout, uint edge_info);
uint16 GetStationCallback(CallbackID callback, uint32 param1, uint32 param2, const StationSpec *statspec, BaseStation *st, TileIndex tile);
CommandCost PerformStationTileSlopeCheck(TileIndex north_tile, TileIndex cur_tile, const StationSpec *statspec, Axis axis, byte plat_len, byte numtracks);
/* Allocate a StationSpec to a Station. This is called once per build operation. */
int AllocateSpecToStation(const StationSpec *statspec, BaseStation *st, bool exec);
/* Deallocate a StationSpec from a Station. Called when removing a single station tile. */
void DeallocateSpecFromStation(BaseStation *st, byte specindex);
/* Draw representation of a station tile for GUI purposes. */
bool DrawStationTile(int x, int y, RailType railtype, Axis axis, StationClassID sclass, uint station);
void AnimateStationTile(TileIndex tile);
void TriggerStationAnimation(BaseStation *st, TileIndex tile, StationAnimationTrigger trigger, CargoID cargo_type = CT_INVALID);
void TriggerStationRandomisation(Station *st, TileIndex tile, StationRandomTrigger trigger, CargoID cargo_type = CT_INVALID);
void StationUpdateCachedTriggers(BaseStation *st);
#endif /* NEWGRF_STATION_H */
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