OpenTTD Source  20241121-master-g67a0fccfad
newgrf_town.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 "town.h"
13 #include "newgrf_town.h"
14 #include "timer/timer_game_tick.h"
15 
16 #include "safeguards.h"
17 
18 /* virtual */ uint32_t TownScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] uint32_t parameter, bool &available) const
19 {
20  if (this->t == nullptr) {
21  available = false;
22  return UINT_MAX;
23  }
24 
25  CargoID cid;
26  switch (variable) {
27  /* Larger towns */
28  case 0x40:
29  if (_settings_game.economy.larger_towns == 0) return 2;
30  if (this->t->larger_town) return 1;
31  return 0;
32 
33  /* Town index */
34  case 0x41: return this->t->index;
35 
36  /* Get a variable from the persistent storage */
37  case 0x7C: {
38  /* Check the persistent storage for the GrfID stored in register 100h. */
39  uint32_t grfid = GetRegister(0x100);
40  if (grfid == 0xFFFFFFFF) {
41  if (this->ro.grffile == nullptr) return 0;
42  grfid = this->ro.grffile->grfid;
43  }
44 
45  for (auto &it : this->t->psa_list) {
46  if (it->grfid == grfid) return it->GetValue(parameter);
47  }
48 
49  return 0;
50  }
51 
52  /* Town properties */
53  case 0x80: return this->t->xy.base();
54  case 0x81: return GB(this->t->xy.base(), 8, 8);
55  case 0x82: return ClampTo<uint16_t>(this->t->cache.population);
56  case 0x83: return GB(ClampTo<uint16_t>(this->t->cache.population), 8, 8);
57  case 0x8A: return this->t->grow_counter / Ticks::TOWN_GROWTH_TICKS;
58  case 0x92: return this->t->flags; // In original game, 0x92 and 0x93 are really one word. Since flags is a byte, this is to adjust
59  case 0x93: return 0;
60  case 0x94: return ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_EDGE]);
61  case 0x95: return GB(ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_EDGE]), 8, 8);
62  case 0x96: return ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_OUTSKIRT]);
63  case 0x97: return GB(ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_OUTSKIRT]), 8, 8);
64  case 0x98: return ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_OUTER_SUBURB]);
65  case 0x99: return GB(ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_OUTER_SUBURB]), 8, 8);
66  case 0x9A: return ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_INNER_SUBURB]);
67  case 0x9B: return GB(ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_INNER_SUBURB]), 8, 8);
68  case 0x9C: return ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_CENTRE]);
69  case 0x9D: return GB(ClampTo<uint16_t>(this->t->cache.squared_town_zone_radius[HZB_TOWN_CENTRE]), 8, 8);
70  case 0x9E: return this->t->ratings[0];
71  case 0x9F: return GB(this->t->ratings[0], 8, 8);
72  case 0xA0: return this->t->ratings[1];
73  case 0xA1: return GB(this->t->ratings[1], 8, 8);
74  case 0xA2: return this->t->ratings[2];
75  case 0xA3: return GB(this->t->ratings[2], 8, 8);
76  case 0xA4: return this->t->ratings[3];
77  case 0xA5: return GB(this->t->ratings[3], 8, 8);
78  case 0xA6: return this->t->ratings[4];
79  case 0xA7: return GB(this->t->ratings[4], 8, 8);
80  case 0xA8: return this->t->ratings[5];
81  case 0xA9: return GB(this->t->ratings[5], 8, 8);
82  case 0xAA: return this->t->ratings[6];
83  case 0xAB: return GB(this->t->ratings[6], 8, 8);
84  case 0xAC: return this->t->ratings[7];
85  case 0xAD: return GB(this->t->ratings[7], 8, 8);
86  case 0xAE: return this->t->have_ratings;
87  case 0xB2: return this->t->statues;
88  case 0xB6: return ClampTo<uint16_t>(this->t->cache.num_houses);
89  case 0xB9: return this->t->growth_rate / Ticks::TOWN_GROWTH_TICKS;
90  case 0xBA: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].new_max) : 0;
91  case 0xBB: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].new_max), 8, 8) : 0;
92  case 0xBC: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].new_max) : 0;
93  case 0xBD: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].new_max), 8, 8) : 0;
94  case 0xBE: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].new_act) : 0;
95  case 0xBF: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].new_act), 8, 8) : 0;
96  case 0xC0: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].new_act) : 0;
97  case 0xC1: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].new_act), 8, 8) : 0;
98  case 0xC2: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].old_max) : 0;
99  case 0xC3: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].old_max), 8, 8) : 0;
100  case 0xC4: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].old_max) : 0;
101  case 0xC5: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].old_max), 8, 8) : 0;
102  case 0xC6: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].old_act) : 0;
103  case 0xC7: cid = GetCargoIDByLabel(CT_PASSENGERS); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].old_act), 8, 8) : 0;
104  case 0xC8: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? ClampTo<uint16_t>(this->t->supplied[cid].old_act) : 0;
105  case 0xC9: cid = GetCargoIDByLabel(CT_MAIL); return IsValidCargoID(cid) ? GB(ClampTo<uint16_t>(this->t->supplied[cid].old_act), 8, 8) : 0;
106  case 0xCA: return this->t->GetPercentTransported(GetCargoIDByLabel(CT_PASSENGERS));
107  case 0xCB: return this->t->GetPercentTransported(GetCargoIDByLabel(CT_MAIL));
108  case 0xCC: return this->t->received[TAE_FOOD].new_act;
109  case 0xCD: return GB(this->t->received[TAE_FOOD].new_act, 8, 8);
110  case 0xCE: return this->t->received[TAE_WATER].new_act;
111  case 0xCF: return GB(this->t->received[TAE_WATER].new_act, 8, 8);
112  case 0xD0: return this->t->received[TAE_FOOD].old_act;
113  case 0xD1: return GB(this->t->received[TAE_FOOD].old_act, 8, 8);
114  case 0xD2: return this->t->received[TAE_WATER].old_act;
115  case 0xD3: return GB(this->t->received[TAE_WATER].old_act, 8, 8);
116  case 0xD4: return this->t->road_build_months;
117  case 0xD5: return this->t->fund_buildings_months;
118  }
119 
120  Debug(grf, 1, "Unhandled town variable 0x{:X}", variable);
121 
122  available = false;
123  return UINT_MAX;
124 }
125 
126 /* virtual */ void TownScopeResolver::StorePSA(uint pos, int32_t value)
127 {
128  if (this->readonly) return;
129 
130  assert(this->t != nullptr);
131  /* We can't store anything if the caller has no #GRFFile. */
132  if (this->ro.grffile == nullptr) return;
133 
134  /* Check the persistent storage for the GrfID stored in register 100h. */
135  uint32_t grfid = GetRegister(0x100);
136 
137  /* A NewGRF can only write in the persistent storage associated to its own GRFID. */
138  if (grfid == 0xFFFFFFFF) grfid = this->ro.grffile->grfid;
139  if (grfid != this->ro.grffile->grfid) return;
140 
141  /* Check if the storage exists. */
142  for (auto &it : t->psa_list) {
143  if (it->grfid == grfid) {
144  it->StoreValue(pos, value);
145  return;
146  }
147  }
148 
149  /* Create a new storage. */
150  assert(PersistentStorage::CanAllocateItem());
151  PersistentStorage *psa = new PersistentStorage(grfid, GSF_FAKE_TOWNS, this->t->xy);
152  psa->StoreValue(pos, value);
153  t->psa_list.push_back(psa);
154 }
155 
162 TownResolverObject::TownResolverObject(const struct GRFFile *grffile, Town *t, bool readonly)
163  : ResolverObject(grffile), town_scope(*this, t, readonly)
164 {
165 }
166 
GB
constexpr static debug_inline uint GB(const T x, const uint8_t s, const uint8_t n)
Fetch n bits from x, started at bit s.
Definition: bitmath_func.hpp:32
CargoID
uint8_t CargoID
Cargo slots to indicate a cargo type within a game.
Definition: cargo_type.h:22
IsValidCargoID
bool IsValidCargoID(CargoID t)
Test whether cargo type is not INVALID_CARGO.
Definition: cargo_type.h:107
CT_PASSENGERS
static constexpr CargoLabel CT_PASSENGERS
Available types of cargo Labels may be re-used between different climates.
Definition: cargo_type.h:30
TAE_FOOD
@ TAE_FOOD
Cargo behaves food/fizzy-drinks-like.
Definition: cargotype.h:28
TAE_WATER
@ TAE_WATER
Cargo behaves water-like.
Definition: cargotype.h:27
Ticks::TOWN_GROWTH_TICKS
static constexpr TimerGameTick::Ticks TOWN_GROWTH_TICKS
Cycle duration for towns trying to grow (this originates from the size of the town array in TTD).
Definition: timer_game_tick.h:83
debug.h
Functions related to debugging.
Debug
#define Debug(category, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
GSF_FAKE_TOWNS
@ GSF_FAKE_TOWNS
Fake town GrfSpecFeature for NewGRF debugging (parent scope)
Definition: newgrf.h:91
GetRegister
uint32_t GetRegister(uint i)
Gets the value of a so-called newgrf "register".
Definition: newgrf_spritegroup.h:29
newgrf_town.h
Functions to handle the town part of NewGRF towns.
safeguards.h
A number of safeguards to prevent using unsafe methods.
_settings_game
GameSettings _settings_game
Game settings of a running game or the scenario editor.
Definition: settings.cpp:57
stdafx.h
Definition of base types and functions in a cross-platform compatible way.
EconomySettings::larger_towns
uint8_t larger_towns
the number of cities to build. These start off larger and grow twice as fast
Definition: settings_type.h:526
GRFFile
Dynamic data of a loaded NewGRF.
Definition: newgrf.h:108
GameSettings::economy
EconomySettings economy
settings to change the economy
Definition: settings_type.h:602
PersistentStorageArray::StoreValue
void StoreValue(uint pos, int32_t value)
Stores some value at a given position.
Definition: newgrf_storage.h:80
PersistentStorage
Class for pooled persistent storage of data.
Definition: newgrf_storage.h:199
Pool::PoolItem::index
Tindex index
Index of this pool item.
Definition: pool_type.hpp:238
Pool::PoolItem<&_persistent_storage_pool >::CanAllocateItem
static bool CanAllocateItem(size_t n=1)
Helper functions so we can use PoolItem::Function() instead of _poolitem_pool.Function()
Definition: pool_type.hpp:309
ResolverObject
Interface for SpriteGroup-s to access the gamestate.
Definition: newgrf_spritegroup.h:308
ResolverObject::grffile
const GRFFile * grffile
GRFFile the resolved SpriteGroup belongs to.
Definition: newgrf_spritegroup.h:336
ScopeResolver::ro
ResolverObject & ro
Surrounding resolver object.
Definition: newgrf_spritegroup.h:290
TownCache::population
uint32_t population
Current population of people.
Definition: town.h:44
TownCache::num_houses
uint32_t num_houses
Amount of houses.
Definition: town.h:43
TownCache::squared_town_zone_radius
std::array< uint32_t, HZB_END > squared_town_zone_radius
UpdateTownRadius updates this given the house count.
Definition: town.h:47
TownResolverObject::TownResolverObject
TownResolverObject(const struct GRFFile *grffile, Town *t, bool readonly)
Resolver for a town.
Definition: newgrf_town.cpp:162
TownScopeResolver::readonly
bool readonly
When set, persistent storage of the town is read-only,.
Definition: newgrf_town.h:24
TownScopeResolver::GetVariable
uint32_t GetVariable(uint8_t variable, [[maybe_unused]] uint32_t parameter, bool &available) const override
Get a variable value.
Definition: newgrf_town.cpp:18
TownScopeResolver::StorePSA
void StorePSA(uint reg, int32_t value) override
Store a value into the persistent storage area (PSA).
Definition: newgrf_town.cpp:126
TownScopeResolver::t
Town * t
Town of the scope.
Definition: newgrf_town.h:23
Town
Town data structure.
Definition: town.h:54
Town::larger_town
bool larger_town
if this is a larger town and should grow more quickly
Definition: town.h:101
Town::supplied
TransportedCargoStat< uint32_t > supplied[NUM_CARGO]
Cargo statistics about supplied cargo.
Definition: town.h:79
Town::statues
CompanyMask statues
which companies have a statue?
Definition: town.h:70
Town::xy
TileIndex xy
town center tile
Definition: town.h:55
Town::fund_buildings_months
uint8_t fund_buildings_months
fund buildings program in action?
Definition: town.h:98
Town::ratings
int16_t ratings[MAX_COMPANIES]
ratings of each company for this town
Definition: town.h:77
Town::received
TransportedCargoStat< uint16_t > received[NUM_TAE]
Cargo statistics about received cargotypes.
Definition: town.h:80
Town::grow_counter
uint16_t grow_counter
counter to count when to grow, value is smaller than or equal to growth_rate
Definition: town.h:95
Town::flags
uint8_t flags
See TownFlags.
Definition: town.h:66
Town::cache
TownCache cache
Container for all cacheable data.
Definition: town.h:57
Town::have_ratings
CompanyMask have_ratings
which companies have a rating
Definition: town.h:73
Town::growth_rate
uint16_t growth_rate
town growth rate
Definition: town.h:96
Town::road_build_months
uint8_t road_build_months
fund road reconstruction in action?
Definition: town.h:99
TransportedCargoStat::new_max
Tstorage new_max
Maximum amount this month.
Definition: town_type.h:115
TransportedCargoStat::old_max
Tstorage old_max
Maximum amount last month.
Definition: town_type.h:114
TransportedCargoStat::old_act
Tstorage old_act
Actually transported last month.
Definition: town_type.h:116
TransportedCargoStat::new_act
Tstorage new_act
Actually transported this month.
Definition: town_type.h:117
timer_game_tick.h
Definition of the tick-based game-timer.
town.h
Base of the town class.