OpenTTD Source  12.0-beta2
newgrf_roadtype.cpp
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1 /*
2  * This file is part of OpenTTD.
3  * 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.
4  * 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.
5  * 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/>.
6  */
7 
10 #include "stdafx.h"
11 #include "debug.h"
12 #include "newgrf_roadtype.h"
13 #include "date_func.h"
14 #include "depot_base.h"
15 #include "town.h"
16 
17 #include "safeguards.h"
18 
19 /* virtual */ uint32 RoadTypeScopeResolver::GetRandomBits() const
20 {
21  uint tmp = CountBits(this->tile + (TileX(this->tile) + TileY(this->tile)) * TILE_SIZE);
22  return GB(tmp, 0, 2);
23 }
24 
25 /* virtual */ uint32 RoadTypeScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
26 {
27  if (this->tile == INVALID_TILE) {
28  switch (variable) {
29  case 0x40: return 0;
30  case 0x41: return 0;
31  case 0x42: return 0;
32  case 0x43: return _date;
33  case 0x44: return HZB_TOWN_EDGE;
34  }
35  }
36 
37  switch (variable) {
38  case 0x40: return GetTerrainType(this->tile, this->context);
39  case 0x41: return 0;
40  case 0x42: return IsLevelCrossingTile(this->tile) && IsCrossingBarred(this->tile);
41  case 0x43:
42  if (IsRoadDepotTile(this->tile)) return Depot::GetByTile(this->tile)->build_date;
43  return _date;
44  case 0x44: {
45  const Town *t = nullptr;
46  if (IsRoadDepotTile(this->tile)) {
47  t = Depot::GetByTile(this->tile)->town;
48  } else {
49  t = ClosestTownFromTile(this->tile, UINT_MAX);
50  }
51  return t != nullptr ? GetTownRadiusGroup(t, this->tile) : HZB_TOWN_EDGE;
52  }
53  }
54 
55  Debug(grf, 1, "Unhandled road type tile variable 0x{:X}", variable);
56 
57  *available = false;
58  return UINT_MAX;
59 }
60 
62 {
63  RoadType rt = GetRoadTypeByLabel(this->roadtype_scope.rti->label, false);
64  switch (GetRoadTramType(rt)) {
65  case RTT_ROAD: return GSF_ROADTYPES;
66  case RTT_TRAM: return GSF_TRAMTYPES;
67  default: return GSF_INVALID;
68  }
69 }
70 
72 {
73  return this->roadtype_scope.rti->label;
74 }
75 
83 {
84  this->tile = tile;
85  this->context = context;
86  this->rti = rti;
87 }
88 
98 RoadTypeResolverObject::RoadTypeResolverObject(const RoadTypeInfo *rti, TileIndex tile, TileContext context, RoadTypeSpriteGroup rtsg, uint32 param1, uint32 param2)
99  : ResolverObject(rti != nullptr ? rti->grffile[rtsg] : nullptr, CBID_NO_CALLBACK, param1, param2), roadtype_scope(*this, rti, tile, context)
100 {
101  this->root_spritegroup = rti != nullptr ? rti->group[rtsg] : nullptr;
102 }
103 
113 SpriteID GetCustomRoadSprite(const RoadTypeInfo *rti, TileIndex tile, RoadTypeSpriteGroup rtsg, TileContext context, uint *num_results)
114 {
115  assert(rtsg < ROTSG_END);
116 
117  if (rti->group[rtsg] == nullptr) return 0;
118 
119  RoadTypeResolverObject object(rti, tile, context, rtsg);
120  const SpriteGroup *group = object.Resolve();
121  if (group == nullptr || group->GetNumResults() == 0) return 0;
122 
123  if (num_results) *num_results = group->GetNumResults();
124 
125  return group->GetResult();
126 }
127 
135 RoadType GetRoadTypeTranslation(RoadTramType rtt, uint8 tracktype, const GRFFile *grffile)
136 {
137  /* Because OpenTTD mixes RoadTypes and TramTypes into the same type,
138  * the mapping of the original road- and tramtypes does not match the default GRF-local mapping.
139  * So, this function cannot provide any similar behavior to GetCargoTranslation() and GetRailTypeTranslation()
140  * when the GRF defines no translation table.
141  * But since there is only one default road/tram-type, this makes little sense anyway.
142  * So for GRF without translation table, we always return INVALID_ROADTYPE.
143  */
144 
145  if (grffile == nullptr) return INVALID_ROADTYPE;
146 
147  const auto &list = rtt == RTT_TRAM ? grffile->tramtype_list : grffile->roadtype_list;
148  if (tracktype >= list.size()) return INVALID_ROADTYPE;
149 
150  /* Look up roadtype including alternate labels. */
151  RoadType result = GetRoadTypeByLabel(list[tracktype]);
152 
153  /* Check whether the result is actually the wanted road/tram-type */
154  if (result != INVALID_ROADTYPE && GetRoadTramType(result) != rtt) return INVALID_ROADTYPE;
155 
156  return result;
157 }
158 
165 uint8 GetReverseRoadTypeTranslation(RoadType roadtype, const GRFFile *grffile)
166 {
167  /* No road type table present, return road type as-is */
168  if (grffile == nullptr) return roadtype;
169 
170  const std::vector<RoadTypeLabel> *list = RoadTypeIsRoad(roadtype) ? &grffile->roadtype_list : &grffile->tramtype_list;
171  if (list->size() == 0) return roadtype;
172 
173  /* Look for a matching road type label in the table */
174  RoadTypeLabel label = GetRoadTypeInfo(roadtype)->label;
175 
176  int index = find_index(*list, label);
177  if (index >= 0) return index;
178 
179  /* If not found, return as invalid */
180  return 0xFF;
181 }
TileIndex
uint32 TileIndex
The index/ID of a Tile.
Definition: tile_type.h:83
RoadTypeInfo
Definition: road.h:75
GRFFile::roadtype_list
std::vector< RoadTypeLabel > roadtype_list
Roadtype translation table (road)
Definition: newgrf.h:132
GB
static uint GB(const T x, const uint8 s, const uint8 n)
Fetch n bits from x, started at bit s.
Definition: bitmath_func.hpp:32
GetRoadTypeByLabel
RoadType GetRoadTypeByLabel(RoadTypeLabel label, bool allow_alternate_labels)
Get the road type for a given label.
Definition: road.cpp:243
ClosestTownFromTile
Town * ClosestTownFromTile(TileIndex tile, uint threshold)
Return the town closest (in distance or ownership) to a given tile, within a given threshold.
Definition: town_cmd.cpp:3594
RoadTypeScopeResolver::RoadTypeScopeResolver
RoadTypeScopeResolver(ResolverObject &ro, const RoadTypeInfo *rti, TileIndex tile, TileContext context)
Constructor of the roadtype scope resolvers.
Definition: newgrf_roadtype.cpp:82
RoadTypeResolverObject::RoadTypeResolverObject
RoadTypeResolverObject(const RoadTypeInfo *rti, TileIndex tile, TileContext context, RoadTypeSpriteGroup rtsg, uint32 param1=0, uint32 param2=0)
Resolver object for road types.
Definition: newgrf_roadtype.cpp:98
INVALID_ROADTYPE
@ INVALID_ROADTYPE
flag for invalid roadtype
Definition: road_type.h:27
IsRoadDepotTile
static bool IsRoadDepotTile(TileIndex t)
Return whether a tile is a road depot tile.
Definition: road_map.h:115
RoadTypeScopeResolver::context
TileContext context
Are we resolving sprites for the upper halftile, or on a bridge?
Definition: newgrf_roadtype.h:20
ResolverObject
Interface for SpriteGroup-s to access the gamestate.
Definition: newgrf_spritegroup.h:307
TILE_SIZE
static const uint TILE_SIZE
Tile size in world coordinates.
Definition: tile_type.h:13
GetReverseRoadTypeTranslation
uint8 GetReverseRoadTypeTranslation(RoadType roadtype, const GRFFile *grffile)
Perform a reverse roadtype lookup to get the GRF internal ID.
Definition: newgrf_roadtype.cpp:165
town.h
TileY
static uint TileY(TileIndex tile)
Get the Y component of a tile.
Definition: map_func.h:215
GSF_INVALID
@ GSF_INVALID
An invalid spec feature.
Definition: newgrf.h:92
ScopeResolver
Interface to query and set values specific to a single VarSpriteGroupScope (action 2 scope).
Definition: newgrf_spritegroup.h:288
TileX
static uint TileX(TileIndex tile)
Get the X component of a tile.
Definition: map_func.h:205
CountBits
static uint CountBits(T value)
Counts the number of set bits in a variable.
Definition: bitmath_func.hpp:251
GetTownRadiusGroup
HouseZonesBits GetTownRadiusGroup(const Town *t, TileIndex tile)
Returns the bit corresponding to the town zone of the specified tile.
Definition: town_cmd.cpp:2257
SpriteID
uint32 SpriteID
The number of a sprite, without mapping bits and colourtables.
Definition: gfx_type.h:17
GetCustomRoadSprite
SpriteID GetCustomRoadSprite(const RoadTypeInfo *rti, TileIndex tile, RoadTypeSpriteGroup rtsg, TileContext context, uint *num_results)
Get the sprite to draw for the given tile.
Definition: newgrf_roadtype.cpp:113
RoadTypeSpriteGroup
RoadTypeSpriteGroup
Sprite groups for a roadtype.
Definition: road.h:57
depot_base.h
GRFFile::tramtype_list
std::vector< RoadTypeLabel > tramtype_list
Roadtype translation table (tram)
Definition: newgrf.h:135
_date
Date _date
Current date in days (day counter)
Definition: date.cpp:28
CBID_NO_CALLBACK
@ CBID_NO_CALLBACK
Set when using the callback resolve system, but not to resolve a callback.
Definition: newgrf_callbacks.h:22
ResolverObject::root_spritegroup
const SpriteGroup * root_spritegroup
Root SpriteGroup to use for resolving.
Definition: newgrf_spritegroup.h:336
find_index
int find_index(std::vector< T > const &vec, T const &item)
Helper function to get the index of an item Consider using std::set, std::unordered_set or std::flat_...
Definition: smallvec_type.hpp:44
RoadTypeInfo::group
const SpriteGroup * group[ROTSG_END]
Sprite groups for resolving sprites.
Definition: road.h:189
IsCrossingBarred
static bool IsCrossingBarred(TileIndex t)
Check if the level crossing is barred.
Definition: road_map.h:416
TileContext
TileContext
Context for tile accesses.
Definition: newgrf_commons.h:24
RoadTypeResolverObject::GetDebugID
uint32 GetDebugID() const override
Get an identifier for the item being resolved.
Definition: newgrf_roadtype.cpp:71
safeguards.h
date_func.h
stdafx.h
RoadType
RoadType
The different roadtypes we support.
Definition: road_type.h:22
RoadTypeResolverObject::GetFeature
GrfSpecFeature GetFeature() const override
Get the feature number being resolved for.
Definition: newgrf_roadtype.cpp:61
GrfSpecFeature
GrfSpecFeature
Definition: newgrf.h:66
SpriteGroup::Resolve
virtual const SpriteGroup * Resolve(ResolverObject &object) const
Base sprite group resolver.
Definition: newgrf_spritegroup.h:61
RoadTypeResolverObject
Resolver object for road types.
Definition: newgrf_roadtype.h:30
newgrf_roadtype.h
RoadTypeInfo::label
RoadTypeLabel label
Unique 32 bit road type identifier.
Definition: road.h:144
GetRoadTypeTranslation
RoadType GetRoadTypeTranslation(RoadTramType rtt, uint8 tracktype, const GRFFile *grffile)
Translate an index to the GRF-local road/tramtype-translation table into a RoadType.
Definition: newgrf_roadtype.cpp:135
GetRoadTypeInfo
static const RoadTypeInfo * GetRoadTypeInfo(RoadType roadtype)
Returns a pointer to the Roadtype information for a given roadtype.
Definition: road.h:224
IsLevelCrossingTile
static bool IsLevelCrossingTile(TileIndex t)
Return whether a tile is a level crossing tile.
Definition: road_map.h:94
Depot::build_date
Date build_date
Date of construction.
Definition: depot_base.h:25
Debug
#define Debug(name, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
RoadTypeScopeResolver::tile
TileIndex tile
Tracktile. For track on a bridge this is the southern bridgehead.
Definition: newgrf_roadtype.h:19
Town
Town data structure.
Definition: town.h:50
RoadTypeResolverObject::roadtype_scope
RoadTypeScopeResolver roadtype_scope
Resolver for the roadtype scope.
Definition: newgrf_roadtype.h:31
INVALID_TILE
static const TileIndex INVALID_TILE
The very nice invalid tile marker.
Definition: tile_type.h:88
SpriteGroup
Definition: newgrf_spritegroup.h:57
RoadTypeScopeResolver::GetVariable
uint32 GetVariable(byte variable, uint32 parameter, bool *available) const
Get a variable value.
Definition: newgrf_roadtype.cpp:25
RoadTypeScopeResolver::GetRandomBits
uint32 GetRandomBits() const
Get a few random bits.
Definition: newgrf_roadtype.cpp:19
GetTerrainType
uint32 GetTerrainType(TileIndex tile, TileContext context)
Function used by houses (and soon industries) to get information on type of "terrain" the tile it is ...
Definition: newgrf_commons.cpp:348
GRFFile
Dynamic data of a loaded NewGRF.
Definition: newgrf.h:105
debug.h