OpenTTD: src/newgrf_station.cpp Source File

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newgrf_station.cpp
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1 /* $Id: newgrf_station.cpp 27984 2018-03-11 13:19:41Z frosch $ */
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
12 #include "stdafx.h"
13 #include "debug.h"
14 #include "station_base.h"
15 #include "waypoint_base.h"
16 #include "roadstop_base.h"
17 #include "newgrf_cargo.h"
18 #include "newgrf_station.h"
19 #include "newgrf_spritegroup.h"
20 #include "newgrf_sound.h"
21 #include "newgrf_railtype.h"
22 #include "town.h"
23 #include "newgrf_town.h"
24 #include "company_func.h"
25 #include "tunnelbridge_map.h"
26 #include "newgrf_animation_base.h"
27 #include "newgrf_class_func.h"
28
29 #include "safeguards.h"
30
31
32 template <typename Tspec, typename Tid, Tid Tmax>
33 /* static */ void NewGRFClass<Tspec, Tid, Tmax>::InsertDefaults()
34 {
35 /* Set up initial data */
36 classes[0].global_id = 'DFLT';
37 classes[0].name = STR_STATION_CLASS_DFLT;
38 classes[0].Insert(NULL);
39
40 classes[1].global_id = 'WAYP';
41 classes[1].name = STR_STATION_CLASS_WAYP;
42 classes[1].Insert(NULL);
43 }
44
45 template <typename Tspec, typename Tid, Tid Tmax>
46 bool NewGRFClass<Tspec, Tid, Tmax>::IsUIAvailable(uint index) const
47 {
48 return true;
49 }
50
51 INSTANTIATE_NEWGRF_CLASS_METHODS(StationClass, StationSpec, StationClassID, STAT_CLASS_MAX)
52
53 static const uint NUM_STATIONSSPECS_PER_STATION = 255;
54
55 enum TriggerArea {
56 TA_TILE,
57 TA_PLATFORM,
58 TA_WHOLE,
59 };
60
61 struct ETileArea : TileArea {
62 ETileArea(const BaseStation *st, TileIndex tile, TriggerArea ta)
63 {
64 switch (ta) {
65 default: NOT_REACHED();
66
67 case TA_TILE:
68 this->tile = tile;
69 this->w = 1;
70 this->h = 1;
71 break;
72
73 case TA_PLATFORM: {
74 TileIndex start, end;
75 Axis axis = GetRailStationAxis(tile);
76 TileIndexDiff delta = TileOffsByDiagDir(AxisToDiagDir(axis));
77
78 for (end = tile; IsRailStationTile(end + delta) && IsCompatibleTrainStationTile(end + delta, tile); end += delta) { /* Nothing */ }
79 for (start = tile; IsRailStationTile(start - delta) && IsCompatibleTrainStationTile(start - delta, tile); start -= delta) { /* Nothing */ }
80
81 this->tile = start;
82 this->w = TileX(end) - TileX(start) + 1;
83 this->h = TileY(end) - TileY(start) + 1;
84 break;
85 }
86
87 case TA_WHOLE:
88 st->GetTileArea(this, Station::IsExpected(st) ? STATION_RAIL : STATION_WAYPOINT);
89 break;
90 }
91 }
92 };
93
94
107 uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred)
108 {
109 uint32 retval = 0;
110
111 if (axis == AXIS_X) {
112 Swap(platforms, length);
113 Swap(x, y);
114 }
115
116 if (centred) {
117 x -= platforms / 2;
118 y -= length / 2;
119 x = Clamp(x, -8, 7);
120 y = Clamp(y, -8, 7);
121 SB(retval, 0, 4, y & 0xF);
122 SB(retval, 4, 4, x & 0xF);
123 } else {
124 SB(retval, 0, 4, min(15, y));
125 SB(retval, 4, 4, min(15, length - y - 1));
126 SB(retval, 8, 4, min(15, x));
127 SB(retval, 12, 4, min(15, platforms - x - 1));
128 }
129 SB(retval, 16, 4, min(15, length));
130 SB(retval, 20, 4, min(15, platforms));
131 SB(retval, 24, 4, tile);
132
133 return retval;
134 }
135
136
145 static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)
146 {
147 byte orig_type = 0;
148 Axis orig_axis = AXIS_X;
149 StationID sid = GetStationIndex(tile);
150
151 if (check_type) orig_type = GetCustomStationSpecIndex(tile);
152 if (check_axis) orig_axis = GetRailStationAxis(tile);
153
154 for (;;) {
155 TileIndex new_tile = TILE_ADD(tile, delta);
156
157 if (!IsTileType(new_tile, MP_STATION) || GetStationIndex(new_tile) != sid) break;
158 if (!HasStationRail(new_tile)) break;
159 if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break;
160 if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break;
161
162 tile = new_tile;
163 }
164 return tile;
165 }
166
167
168 static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred)
169 {
170 int tx = TileX(tile);
171 int ty = TileY(tile);
172 int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1, 0), check_type, check_axis));
173 int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis));
174 int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1, 0), check_type, check_axis)) + 1;
175 int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0, 1), check_type, check_axis)) + 1;
176
177 tx -= sx; ex -= sx;
178 ty -= sy; ey -= sy;
179
180 return GetPlatformInfo(GetRailStationAxis(tile), GetStationGfx(tile), ex, ey, tx, ty, centred);
181 }
182
183
184 static uint32 GetRailContinuationInfo(TileIndex tile)
185 {
186 /* Tile offsets and exit dirs for X axis */
187 static const Direction x_dir[8] = { DIR_SW, DIR_NE, DIR_SE, DIR_NW, DIR_S, DIR_E, DIR_W, DIR_N };
188 static const DiagDirection x_exits[8] = { DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SW, DIAGDIR_NE };
189
190 /* Tile offsets and exit dirs for Y axis */
191 static const Direction y_dir[8] = { DIR_SE, DIR_NW, DIR_SW, DIR_NE, DIR_S, DIR_W, DIR_E, DIR_N };
192 static const DiagDirection y_exits[8] = { DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_NW };
193
194 Axis axis = GetRailStationAxis(tile);
195
196 /* Choose appropriate lookup table to use */
197 const Direction *dir = axis == AXIS_X ? x_dir : y_dir;
198 const DiagDirection *diagdir = axis == AXIS_X ? x_exits : y_exits;
199
200 uint32 res = 0;
201 uint i;
202
203 for (i = 0; i < lengthof(x_dir); i++, dir++, diagdir++) {
204 TileIndex neighbour_tile = tile + TileOffsByDir(*dir);
205 TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(neighbour_tile, TRANSPORT_RAIL, 0));
206 if (trackbits != TRACK_BIT_NONE) {
207 /* If there is any track on the tile, set the bit in the second byte */
208 SetBit(res, i + 8);
209
210 /* With tunnels and bridges the tile has tracks, but they are not necessarily connected
211 * with the next tile because the ramp is not going in the right direction. */
212 if (IsTileType(neighbour_tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(neighbour_tile) != *diagdir) {
213 continue;
214 }
215
216 /* If any track reaches our exit direction, set the bit in the lower byte */
217 if (trackbits & DiagdirReachesTracks(*diagdir)) SetBit(res, i);
218 }
219 }
220
221 return res;
222 }
223
224
225 /* Station Resolver Functions */
226 /* virtual */ uint32 StationScopeResolver::GetRandomBits() const
227 {
228 return (this->st == NULL ? 0 : this->st->random_bits) | (this->tile == INVALID_TILE ? 0 : GetStationTileRandomBits(this->tile) << 16);
229 }
230
231
232 /* virtual */ uint32 StationScopeResolver::GetTriggers() const
233 {
234 return this->st == NULL ? 0 : this->st->waiting_triggers;
235 }
236
237
243 static struct {
244 uint32 v40;
245 uint32 v41;
246 uint32 v45;
247 uint32 v46;
248 uint32 v47;
249 uint32 v49;
250 uint8 valid;
251 } _svc;
252
258 TownScopeResolver *StationResolverObject::GetTown()
259 {
260 if (this->town_scope == NULL) {
261 Town *t = NULL;
262 if (this->station_scope.st != NULL) {
263 t = this->station_scope.st->town;
264 } else if (this->station_scope.tile != INVALID_TILE) {
265 t = ClosestTownFromTile(this->station_scope.tile, UINT_MAX);
266 }
267 if (t == NULL) return NULL;
268 this->town_scope = new TownScopeResolver(*this, t, this->station_scope.st == NULL);
269 }
270 return this->town_scope;
271 }
272
273 /* virtual */ uint32 StationScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
274 {
275 if (this->st == NULL) {
276 /* Station does not exist, so we're in a purchase list or the land slope check callback. */
277 switch (variable) {
278 case 0x40:
279 case 0x41:
280 case 0x46:
281 case 0x47:
282 case 0x49: return 0x2110000; // Platforms, tracks & position
283 case 0x42: return 0; // Rail type (XXX Get current type from GUI?)
284 case 0x43: return GetCompanyInfo(_current_company); // Station owner
285 case 0x44: return 2; // PBS status
286 case 0x67: // Land info of nearby tile
287 if (this->axis != INVALID_AXIS && this->tile != INVALID_TILE) {
288 TileIndex tile = this->tile;
289 if (parameter != 0) tile = GetNearbyTile(parameter, tile, true, this->axis); // only perform if it is required
290
291 Slope tileh = GetTileSlope(tile);
292 bool swap = (this->axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
293
294 return GetNearbyTileInformation(tile, this->ro.grffile->grf_version >= 8) ^ (swap ? SLOPE_EW : 0);
295 }
296 break;
297
298 case 0xFA: return Clamp(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
299 }
300
301 *available = false;
302 return UINT_MAX;
303 }
304
305 switch (variable) {
306 /* Calculated station variables */
307 case 0x40:
308 if (!HasBit(_svc.valid, 0)) { _svc.v40 = GetPlatformInfoHelper(this->tile, false, false, false); SetBit(_svc.valid, 0); }
309 return _svc.v40;
310
311 case 0x41:
312 if (!HasBit(_svc.valid, 1)) { _svc.v41 = GetPlatformInfoHelper(this->tile, true, false, false); SetBit(_svc.valid, 1); }
313 return _svc.v41;
314
315 case 0x42: return GetTerrainType(this->tile) | (GetReverseRailTypeTranslation(GetRailType(this->tile), this->statspec->grf_prop.grffile) << 8);
316 case 0x43: return GetCompanyInfo(this->st->owner); // Station owner
317 case 0x44: return HasStationReservation(this->tile) ? 7 : 4; // PBS status
318 case 0x45:
319 if (!HasBit(_svc.valid, 2)) { _svc.v45 = GetRailContinuationInfo(this->tile); SetBit(_svc.valid, 2); }
320 return _svc.v45;
321
322 case 0x46:
323 if (!HasBit(_svc.valid, 3)) { _svc.v46 = GetPlatformInfoHelper(this->tile, false, false, true); SetBit(_svc.valid, 3); }
324 return _svc.v46;
325
326 case 0x47:
327 if (!HasBit(_svc.valid, 4)) { _svc.v47 = GetPlatformInfoHelper(this->tile, true, false, true); SetBit(_svc.valid, 4); }
328 return _svc.v47;
329
330 case 0x49:
331 if (!HasBit(_svc.valid, 5)) { _svc.v49 = GetPlatformInfoHelper(this->tile, false, true, false); SetBit(_svc.valid, 5); }
332 return _svc.v49;
333
334 case 0x4A: // Animation frame of tile
335 return GetAnimationFrame(this->tile);
336
337 /* Variables which use the parameter */
338 /* Variables 0x60 to 0x65 and 0x69 are handled separately below */
339 case 0x66: { // Animation frame of nearby tile
340 TileIndex tile = this->tile;
341 if (parameter != 0) tile = GetNearbyTile(parameter, tile);
342 return this->st->TileBelongsToRailStation(tile) ? GetAnimationFrame(tile) : UINT_MAX;
343 }
344
345 case 0x67: { // Land info of nearby tile
346 Axis axis = GetRailStationAxis(this->tile);
347 TileIndex tile = this->tile;
348 if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
349
350 Slope tileh = GetTileSlope(tile);
351 bool swap = (axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
352
353 return GetNearbyTileInformation(tile, this->ro.grffile->grf_version >= 8) ^ (swap ? SLOPE_EW : 0);
354 }
355
356 case 0x68: { // Station info of nearby tiles
357 TileIndex nearby_tile = GetNearbyTile(parameter, this->tile);
358
359 if (!HasStationTileRail(nearby_tile)) return 0xFFFFFFFF;
360
361 uint32 grfid = this->st->speclist[GetCustomStationSpecIndex(this->tile)].grfid;
362 bool perpendicular = GetRailStationAxis(this->tile) != GetRailStationAxis(nearby_tile);
363 bool same_station = this->st->TileBelongsToRailStation(nearby_tile);
364 uint32 res = GB(GetStationGfx(nearby_tile), 1, 2) << 12 | !!perpendicular << 11 | !!same_station << 10;
365
366 if (IsCustomStationSpecIndex(nearby_tile)) {
367 const StationSpecList ssl = BaseStation::GetByTile(nearby_tile)->speclist[GetCustomStationSpecIndex(nearby_tile)];
368 res |= 1 << (ssl.grfid != grfid ? 9 : 8) | ssl.localidx;
369 }
370 return res;
371 }
372
373 /* General station variables */
374 case 0x82: return 50;
375 case 0x84: return this->st->string_id;
376 case 0x86: return 0;
377 case 0xF0: return this->st->facilities;
378 case 0xFA: return Clamp(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
379 }
380
381 return this->st->GetNewGRFVariable(this->ro, variable, parameter, available);
382 }
383
384 uint32 Station::GetNewGRFVariable(const ResolverObject &object, byte variable, byte parameter, bool *available) const
385 {
386 switch (variable) {
387 case 0x48: { // Accepted cargo types
388 CargoID cargo_type;
389 uint32 value = 0;
390
391 for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
392 if (HasBit(this->goods[cargo_type].status, GoodsEntry::GES_ACCEPTANCE)) SetBit(value, cargo_type);
393 }
394 return value;
395 }
396
397 case 0x8A: return this->had_vehicle_of_type;
398 case 0xF1: return (this->airport.tile != INVALID_TILE) ? this->airport.GetSpec()->ttd_airport_type : ATP_TTDP_LARGE;
399 case 0xF2: return (this->truck_stops != NULL) ? this->truck_stops->status : 0;
400 case 0xF3: return (this->bus_stops != NULL) ? this->bus_stops->status : 0;
401 case 0xF6: return this->airport.flags;
402 case 0xF7: return GB(this->airport.flags, 8, 8);
403 }
404
405 /* Handle cargo variables with parameter, 0x60 to 0x65 and 0x69 */
406 if ((variable >= 0x60 && variable <= 0x65) || variable == 0x69) {
407 CargoID c = GetCargoTranslation(parameter, object.grffile);
408
409 if (c == CT_INVALID) {
410 switch (variable) {
411 case 0x62: return 0xFFFFFFFF;
412 case 0x64: return 0xFF00;
413 default: return 0;
414 }
415 }
416 const GoodsEntry *ge = &this->goods[c];
417
418 switch (variable) {
419 case 0x60: return min(ge->cargo.TotalCount(), 4095);
420 case 0x61: return ge->HasVehicleEverTriedLoading() ? ge->time_since_pickup : 0;
421 case 0x62: return ge->HasRating() ? ge->rating : 0xFFFFFFFF;
422 case 0x63: return ge->cargo.DaysInTransit();
423 case 0x64: return ge->HasVehicleEverTriedLoading() ? ge->last_speed | (ge->last_age << 8) : 0xFF00;
424 case 0x65: return GB(ge->status, GoodsEntry::GES_ACCEPTANCE, 1) << 3;
425 case 0x69: {
426 assert_compile((int)GoodsEntry::GES_EVER_ACCEPTED + 1 == (int)GoodsEntry::GES_LAST_MONTH);
427 assert_compile((int)GoodsEntry::GES_EVER_ACCEPTED + 2 == (int)GoodsEntry::GES_CURRENT_MONTH);
428 assert_compile((int)GoodsEntry::GES_EVER_ACCEPTED + 3 == (int)GoodsEntry::GES_ACCEPTED_BIGTICK);
429 return GB(ge->status, GoodsEntry::GES_EVER_ACCEPTED, 4);
430 }
431 }
432 }
433
434 /* Handle cargo variables (deprecated) */
435 if (variable >= 0x8C && variable <= 0xEC) {
436 const GoodsEntry *g = &this->goods[GB(variable - 0x8C, 3, 4)];
437 switch (GB(variable - 0x8C, 0, 3)) {
438 case 0: return g->cargo.TotalCount();
439 case 1: return GB(min(g->cargo.TotalCount(), 4095), 0, 4) | (GB(g->status, GoodsEntry::GES_ACCEPTANCE, 1) << 7);
440 case 2: return g->time_since_pickup;
441 case 3: return g->rating;
442 case 4: return g->cargo.Source();
443 case 5: return g->cargo.DaysInTransit();
444 case 6: return g->last_speed;
445 case 7: return g->last_age;
446 }
447 }
448
449 DEBUG(grf, 1, "Unhandled station variable 0x%X", variable);
450
451 *available = false;
452 return UINT_MAX;
453 }
454
455 uint32 Waypoint::GetNewGRFVariable(const ResolverObject &object, byte variable, byte parameter, bool *available) const
456 {
457 switch (variable) {
458 case 0x48: return 0; // Accepted cargo types
459 case 0x8A: return HVOT_WAYPOINT;
460 case 0xF1: return 0; // airport type
461 case 0xF2: return 0; // truck stop status
462 case 0xF3: return 0; // bus stop status
463 case 0xF6: return 0; // airport flags
464 case 0xF7: return 0; // airport flags cont.
465 }
466
467 /* Handle cargo variables with parameter, 0x60 to 0x65 */
468 if (variable >= 0x60 && variable <= 0x65) {
469 return 0;
470 }
471
472 /* Handle cargo variables (deprecated) */
473 if (variable >= 0x8C && variable <= 0xEC) {
474 switch (GB(variable - 0x8C, 0, 3)) {
475 case 3: return INITIAL_STATION_RATING;
476 case 4: return INVALID_STATION;
477 default: return 0;
478 }
479 }
480
481 DEBUG(grf, 1, "Unhandled station variable 0x%X", variable);
482
483 *available = false;
484 return UINT_MAX;
485 }
486
487 /* virtual */ const SpriteGroup *StationResolverObject::ResolveReal(const RealSpriteGroup *group) const
488 {
489 if (this->station_scope.st == NULL || this->station_scope.statspec->cls_id == STAT_CLASS_WAYP) {
490 return group->loading[0];
491 }
492
493 uint cargo = 0;
494 const Station *st = Station::From(this->station_scope.st);
495
496 switch (this->station_scope.cargo_type) {
497 case CT_INVALID:
498 case CT_DEFAULT_NA:
499 case CT_PURCHASE:
500 cargo = 0;
501 break;
502
503 case CT_DEFAULT:
504 for (CargoID cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
505 cargo += st->goods[cargo_type].cargo.TotalCount();
506 }
507 break;
508
509 default:
510 cargo = st->goods[this->station_scope.cargo_type].cargo.TotalCount();
511 break;
512 }
513
514 if (HasBit(this->station_scope.statspec->flags, SSF_DIV_BY_STATION_SIZE)) cargo /= (st->train_station.w + st->train_station.h);
515 cargo = min(0xfff, cargo);
516
517 if (cargo > this->station_scope.statspec->cargo_threshold) {
518 if (group->num_loading > 0) {
519 uint set = ((cargo - this->station_scope.statspec->cargo_threshold) * group->num_loading) / (4096 - this->station_scope.statspec->cargo_threshold);
520 return group->loading[set];
521 }
522 } else {
523 if (group->num_loaded > 0) {
524 uint set = (cargo * group->num_loaded) / (this->station_scope.statspec->cargo_threshold + 1);
525 return group->loaded[set];
526 }
527 }
528
529 return group->loading[0];
530 }
531
541 StationResolverObject::StationResolverObject(const StationSpec *statspec, BaseStation *st, TileIndex tile,
542 CallbackID callback, uint32 callback_param1, uint32 callback_param2)
543 : ResolverObject(statspec->grf_prop.grffile, callback, callback_param1, callback_param2),
544 station_scope(*this, statspec, st, tile), town_scope(NULL)
545 {
546 /* Invalidate all cached vars */
547 _svc.valid = 0;
548
549 CargoID ctype = CT_DEFAULT_NA;
550
551 if (this->station_scope.st == NULL) {
552 /* No station, so we are in a purchase list */
553 ctype = CT_PURCHASE;
554 } else if (Station::IsExpected(this->station_scope.st)) {
555 const Station *st = Station::From(this->station_scope.st);
556 /* Pick the first cargo that we have waiting */
557 const CargoSpec *cs;
558 FOR_ALL_CARGOSPECS(cs) {
559 if (this->station_scope.statspec->grf_prop.spritegroup[cs->Index()] != NULL &&
560 st->goods[cs->Index()].cargo.TotalCount() > 0) {
561 ctype = cs->Index();
562 break;
563 }
564 }
565 }
566
567 if (this->station_scope.statspec->grf_prop.spritegroup[ctype] == NULL) {
568 ctype = CT_DEFAULT;
569 }
570
571 /* Remember the cargo type we've picked */
572 this->station_scope.cargo_type = ctype;
573 this->root_spritegroup = this->station_scope.statspec->grf_prop.spritegroup[this->station_scope.cargo_type];
574 }
575
576 StationResolverObject::~StationResolverObject()
577 {
578 delete this->town_scope;
579 }
580
589 SpriteID GetCustomStationRelocation(const StationSpec *statspec, BaseStation *st, TileIndex tile, uint32 var10)
590 {
591 StationResolverObject object(statspec, st, tile, CBID_NO_CALLBACK, var10);
592 const SpriteGroup *group = object.Resolve();
593 if (group == NULL || group->type != SGT_RESULT) return 0;
594 return group->GetResult() - 0x42D;
595 }
596
606 SpriteID GetCustomStationFoundationRelocation(const StationSpec *statspec, BaseStation *st, TileIndex tile, uint layout, uint edge_info)
607 {
608 /* callback_param1 == 2 means we are resolving the foundation sprites. */
609 StationResolverObject object(statspec, st, tile, CBID_NO_CALLBACK, 2, layout | (edge_info << 16));
610
611 const SpriteGroup *group = object.Resolve();
612 if (group == NULL || group->type != SGT_RESULT) return 0;
613
614 /* Note: SpriteGroup::Resolve zeroes all registers, so register 0x100 is initialised to 0. (compatibility) */
615 return group->GetResult() + GetRegister(0x100);
616 }
617
618
619 uint16 GetStationCallback(CallbackID callback, uint32 param1, uint32 param2, const StationSpec *statspec, BaseStation *st, TileIndex tile)
620 {
621 StationResolverObject object(statspec, st, tile, callback, param1, param2);
622 return object.ResolveCallback();
623 }
624
635 CommandCost PerformStationTileSlopeCheck(TileIndex north_tile, TileIndex cur_tile, const StationSpec *statspec, Axis axis, byte plat_len, byte numtracks)
636 {
637 TileIndexDiff diff = cur_tile - north_tile;
638 Slope slope = GetTileSlope(cur_tile);
639
640 StationResolverObject object(statspec, NULL, cur_tile, CBID_STATION_LAND_SLOPE_CHECK,
641 (slope << 4) | (slope ^ (axis == AXIS_Y && HasBit(slope, CORNER_W) != HasBit(slope, CORNER_E) ? SLOPE_EW : 0)),
642 (numtracks << 24) | (plat_len << 16) | (axis == AXIS_Y ? TileX(diff) << 8 | TileY(diff) : TileY(diff) << 8 | TileX(diff)));
643 object.station_scope.axis = axis;
644
645 uint16 cb_res = object.ResolveCallback();
646
647 /* Failed callback means success. */
648 if (cb_res == CALLBACK_FAILED) return CommandCost();
649
650 /* The meaning of bit 10 is inverted for a grf version < 8. */
651 if (statspec->grf_prop.grffile->grf_version < 8) ToggleBit(cb_res, 10);
652 return GetErrorMessageFromLocationCallbackResult(cb_res, statspec->grf_prop.grffile, STR_ERROR_LAND_SLOPED_IN_WRONG_DIRECTION);
653 }
654
655
663 int AllocateSpecToStation(const StationSpec *statspec, BaseStation *st, bool exec)
664 {
665 uint i;
666
667 if (statspec == NULL || st == NULL) return 0;
668
669 for (i = 1; i < st->num_specs && i < NUM_STATIONSSPECS_PER_STATION; i++) {
670 if (st->speclist[i].spec == NULL && st->speclist[i].grfid == 0) break;
671 }
672
673 if (i == NUM_STATIONSSPECS_PER_STATION) {
674 /* As final effort when the spec list is already full...
675 * try to find the same spec and return that one. This might
676 * result in slightly "wrong" (as per specs) looking stations,
677 * but it's fairly unlikely that one reaches the limit anyways.
678 */
679 for (i = 1; i < st->num_specs && i < NUM_STATIONSSPECS_PER_STATION; i++) {
680 if (st->speclist[i].spec == statspec) return i;
681 }
682
683 return -1;
684 }
685
686 if (exec) {
687 if (i >= st->num_specs) {
688 st->num_specs = i + 1;
689 st->speclist = ReallocT(st->speclist, st->num_specs);
690
691 if (st->num_specs == 2) {
692 /* Initial allocation */
693 st->speclist[0].spec = NULL;
694 st->speclist[0].grfid = 0;
695 st->speclist[0].localidx = 0;
696 }
697 }
698
699 st->speclist[i].spec = statspec;
700 st->speclist[i].grfid = statspec->grf_prop.grffile->grfid;
701 st->speclist[i].localidx = statspec->grf_prop.local_id;
702
703 StationUpdateCachedTriggers(st);
704 }
705
706 return i;
707 }
708
709
716 void DeallocateSpecFromStation(BaseStation *st, byte specindex)
717 {
718 /* specindex of 0 (default) is never freeable */
719 if (specindex == 0) return;
720
721 ETileArea area = ETileArea(st, INVALID_TILE, TA_WHOLE);
722 /* Check all tiles over the station to check if the specindex is still in use */
723 TILE_AREA_LOOP(tile, area) {
724 if (st->TileBelongsToRailStation(tile) && GetCustomStationSpecIndex(tile) == specindex) {
725 return;
726 }
727 }
728
729 /* This specindex is no longer in use, so deallocate it */
730 st->speclist[specindex].spec = NULL;
731 st->speclist[specindex].grfid = 0;
732 st->speclist[specindex].localidx = 0;
733
734 /* If this was the highest spec index, reallocate */
735 if (specindex == st->num_specs - 1) {
736 for (; st->speclist[st->num_specs - 1].grfid == 0 && st->num_specs > 1; st->num_specs--) {}
737
738 if (st->num_specs > 1) {
739 st->speclist = ReallocT(st->speclist, st->num_specs);
740 } else {
741 free(st->speclist);
742 st->num_specs = 0;
743 st->speclist = NULL;
744 st->cached_anim_triggers = 0;
745 st->cached_cargo_triggers = 0;
746 return;
747 }
748 }
749
750 StationUpdateCachedTriggers(st);
751 }
752
763 bool DrawStationTile(int x, int y, RailType railtype, Axis axis, StationClassID sclass, uint station)
764 {
765 const DrawTileSprites *sprites = NULL;
766 const RailtypeInfo *rti = GetRailTypeInfo(railtype);
767 PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
768 uint tile = 2;
769
770 const StationSpec *statspec = StationClass::Get(sclass)->GetSpec(station);
771 if (statspec == NULL) return false;
772
773 if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
774 uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0x2110000, 0, statspec, NULL, INVALID_TILE);
775 if (callback != CALLBACK_FAILED) tile = callback;
776 }
777
778 uint32 total_offset = rti->GetRailtypeSpriteOffset();
779 uint32 relocation = 0;
780 uint32 ground_relocation = 0;
781 const NewGRFSpriteLayout *layout = NULL;
782 DrawTileSprites tmp_rail_layout;
783
784 if (statspec->renderdata == NULL) {
785 sprites = GetStationTileLayout(STATION_RAIL, tile + axis);
786 } else {
787 layout = &statspec->renderdata[(tile < statspec->tiles) ? tile + axis : (uint)axis];
788 if (!layout->NeedsPreprocessing()) {
789 sprites = layout;
790 layout = NULL;
791 }
792 }
793
794 if (layout != NULL) {
795 /* Sprite layout which needs preprocessing */
796 bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
797 uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
798 uint8 var10;
799 FOR_EACH_SET_BIT(var10, var10_values) {
800 uint32 var10_relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE, var10);
801 layout->ProcessRegisters(var10, var10_relocation, separate_ground);
802 }
803
804 tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
805 sprites = &tmp_rail_layout;
806 total_offset = 0;
807 } else {
808 /* Simple sprite layout */
809 ground_relocation = relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE, 0);
810 if (HasBit(sprites->ground.sprite, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
811 ground_relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE, 1);
812 }
813 ground_relocation += rti->fallback_railtype;
814 }
815
816 SpriteID image = sprites->ground.sprite;
817 PaletteID pal = sprites->ground.pal;
818 RailTrackOffset overlay_offset;
819 if (rti->UsesOverlay() && SplitGroundSpriteForOverlay(NULL, &image, &overlay_offset)) {
820 SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
821 DrawSprite(image, PAL_NONE, x, y);
822 DrawSprite(ground + overlay_offset, PAL_NONE, x, y);
823 } else {
824 image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
825 if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
826 DrawSprite(image, GroundSpritePaletteTransform(image, pal, palette), x, y);
827 }
828
829 DrawRailTileSeqInGUI(x, y, sprites, total_offset, relocation, palette);
830
831 return true;
832 }
833
834
835 const StationSpec *GetStationSpec(TileIndex t)
836 {
837 if (!IsCustomStationSpecIndex(t)) return NULL;
838
839 const BaseStation *st = BaseStation::GetByTile(t);
840 uint specindex = GetCustomStationSpecIndex(t);
841 return specindex < st->num_specs ? st->speclist[specindex].spec : NULL;
842 }
843
844
851 bool IsStationTileBlocked(TileIndex tile)
852 {
853 const StationSpec *statspec = GetStationSpec(tile);
854
855 return statspec != NULL && HasBit(statspec->blocked, GetStationGfx(tile));
856 }
857
864 bool CanStationTileHavePylons(TileIndex tile)
865 {
866 const StationSpec *statspec = GetStationSpec(tile);
867 uint gfx = GetStationGfx(tile);
868 /* Default stations do not draw pylons under roofs (gfx >= 4) */
869 return statspec != NULL ? HasBit(statspec->pylons, gfx) : gfx < 4;
870 }
871
878 bool CanStationTileHaveWires(TileIndex tile)
879 {
880 const StationSpec *statspec = GetStationSpec(tile);
881 return statspec == NULL || !HasBit(statspec->wires, GetStationGfx(tile));
882 }
883
885 uint16 GetAnimStationCallback(CallbackID callback, uint32 param1, uint32 param2, const StationSpec *statspec, BaseStation *st, TileIndex tile, int extra_data)
886 {
887 return GetStationCallback(callback, param1, param2, statspec, st, tile);
888 }
889
891 struct StationAnimationBase : public AnimationBase<StationAnimationBase, StationSpec, BaseStation, int, GetAnimStationCallback> {
892 static const CallbackID cb_animation_speed = CBID_STATION_ANIMATION_SPEED;
893 static const CallbackID cb_animation_next_frame = CBID_STATION_ANIM_NEXT_FRAME;
894
895 static const StationCallbackMask cbm_animation_speed = CBM_STATION_ANIMATION_SPEED;
896 static const StationCallbackMask cbm_animation_next_frame = CBM_STATION_ANIMATION_NEXT_FRAME;
897 };
898
899 void AnimateStationTile(TileIndex tile)
900 {
901 const StationSpec *ss = GetStationSpec(tile);
902 if (ss == NULL) return;
903
904 StationAnimationBase::AnimateTile(ss, BaseStation::GetByTile(tile), tile, HasBit(ss->flags, SSF_CB141_RANDOM_BITS));
905 }
906
907 void TriggerStationAnimation(BaseStation *st, TileIndex tile, StationAnimationTrigger trigger, CargoID cargo_type)
908 {
909 /* List of coverage areas for each animation trigger */
910 static const TriggerArea tas[] = {
911 TA_TILE, TA_WHOLE, TA_WHOLE, TA_PLATFORM, TA_PLATFORM, TA_PLATFORM, TA_WHOLE
912 };
913
914 /* Get Station if it wasn't supplied */
915 if (st == NULL) st = BaseStation::GetByTile(tile);
916
917 /* Check the cached animation trigger bitmask to see if we need
918 * to bother with any further processing. */
919 if (!HasBit(st->cached_anim_triggers, trigger)) return;
920
921 uint16 random_bits = Random();
922 ETileArea area = ETileArea(st, tile, tas[trigger]);
923
924 /* Check all tiles over the station to check if the specindex is still in use */
925 TILE_AREA_LOOP(tile, area) {
926 if (st->TileBelongsToRailStation(tile)) {
927 const StationSpec *ss = GetStationSpec(tile);
928 if (ss != NULL && HasBit(ss->animation.triggers, trigger)) {
929 CargoID cargo;
930 if (cargo_type == CT_INVALID) {
931 cargo = CT_INVALID;
932 } else {
933 cargo = ss->grf_prop.grffile->cargo_map[cargo_type];
934 }
935 StationAnimationBase::ChangeAnimationFrame(CBID_STATION_ANIM_START_STOP, ss, st, tile, (random_bits << 16) | Random(), (uint8)trigger | (cargo << 8));
936 }
937 }
938 }
939 }
940
948 void TriggerStationRandomisation(Station *st, TileIndex tile, StationRandomTrigger trigger, CargoID cargo_type)
949 {
950 /* List of coverage areas for each animation trigger */
951 static const TriggerArea tas[] = {
952 TA_WHOLE, TA_WHOLE, TA_PLATFORM, TA_PLATFORM, TA_PLATFORM, TA_PLATFORM
953 };
954
955 /* Get Station if it wasn't supplied */
956 if (st == NULL) st = Station::GetByTile(tile);
957
958 /* Check the cached cargo trigger bitmask to see if we need
959 * to bother with any further processing. */
960 if (st->cached_cargo_triggers == 0) return;
961 if (cargo_type != CT_INVALID && !HasBit(st->cached_cargo_triggers, cargo_type)) return;
962
963 uint32 whole_reseed = 0;
964 ETileArea area = ETileArea(st, tile, tas[trigger]);
965
966 uint32 empty_mask = 0;
967 if (trigger == SRT_CARGO_TAKEN) {
968 /* Create a bitmask of completely empty cargo types to be matched */
969 for (CargoID i = 0; i < NUM_CARGO; i++) {
970 if (st->goods[i].cargo.TotalCount() == 0) {
971 SetBit(empty_mask, i);
972 }
973 }
974 }
975
976 /* Store triggers now for var 5F */
977 SetBit(st->waiting_triggers, trigger);
978 uint32 used_triggers = 0;
979
980 /* Check all tiles over the station to check if the specindex is still in use */
981 TILE_AREA_LOOP(tile, area) {
982 if (st->TileBelongsToRailStation(tile)) {
983 const StationSpec *ss = GetStationSpec(tile);
984 if (ss == NULL) continue;
985
986 /* Cargo taken "will only be triggered if all of those
987 * cargo types have no more cargo waiting." */
988 if (trigger == SRT_CARGO_TAKEN) {
989 if ((ss->cargo_triggers & ~empty_mask) != 0) continue;
990 }
991
992 if (cargo_type == CT_INVALID || HasBit(ss->cargo_triggers, cargo_type)) {
993 StationResolverObject object(ss, st, tile, CBID_RANDOM_TRIGGER, 0);
994 object.waiting_triggers = st->waiting_triggers;
995
996 const SpriteGroup *group = object.Resolve();
997 if (group == NULL) continue;
998
999 used_triggers |= object.used_triggers;
1000
1001 uint32 reseed = object.GetReseedSum();
1002 if (reseed != 0) {
1003 whole_reseed |= reseed;
1004 reseed >>= 16;
1005
1006 /* Set individual tile random bits */
1007 uint8 random_bits = GetStationTileRandomBits(tile);
1008 random_bits &= ~reseed;
1009 random_bits |= Random() & reseed;
1010 SetStationTileRandomBits(tile, random_bits);
1011
1012 MarkTileDirtyByTile(tile);
1013 }
1014 }
1015 }
1016 }
1017
1018 /* Update whole station random bits */
1019 st->waiting_triggers &= ~used_triggers;
1020 if ((whole_reseed & 0xFFFF) != 0) {
1021 st->random_bits &= ~whole_reseed;
1022 st->random_bits |= Random() & whole_reseed;
1023 }
1024 }
1025
1030 void StationUpdateCachedTriggers(BaseStation *st)
1031 {
1032 st->cached_anim_triggers = 0;
1033 st->cached_cargo_triggers = 0;
1034
1035 /* Combine animation trigger bitmask for all station specs
1036 * of this station. */
1037 for (uint i = 0; i < st->num_specs; i++) {
1038 const StationSpec *ss = st->speclist[i].spec;
1039 if (ss != NULL) {
1040 st->cached_anim_triggers |= ss->animation.triggers;
1041 st->cached_cargo_triggers |= ss->cargo_triggers;
1042 }
1043 }
1044 }
1045