1

/* $Id$ */

     2

     3

/** @file newgrf_station.c Functions for dealing with station classes and custom stations. */

     4

     5

#include "stdafx.h"

     6

#include "openttd.h"

     7

#include "variables.h"

     8

#include "functions.h"

     9

#include "debug.h"

    10

#include "sprite.h"

    11

#include "table/sprites.h"

    12

#include "table/strings.h"

    13

#include "station.h"

    14

#include "station_map.h"

    15

#include "newgrf_callbacks.h"

    16

#include "newgrf_station.h"

    17

#include "newgrf_spritegroup.h"

    18

    19

static StationClass station_classes[STAT_CLASS_MAX];

    20

    21

enum {

    22

	MAX_SPECLIST = 255,

    23

};

    24

    25

/**

    26

 * Reset station classes to their default state.

    27

 * This includes initialising the Default and Waypoint classes with an empty

    28

 * entry, for standard stations and waypoints.

    29

 */

    30

void ResetStationClasses(void)

    31

{

    32

	StationClassID i;

    33

	for (i = 0; i < STAT_CLASS_MAX; i++) {

    34

		station_classes[i].id = 0;

    35

		station_classes[i].name = STR_EMPTY;

    36

		station_classes[i].stations = 0;

    37

    38

		free(station_classes[i].spec);

    39

		station_classes[i].spec = NULL;

    40

	}

    41

    42

	// Set up initial data

    43

	station_classes[0].id = 'DFLT';

    44

	station_classes[0].name = STR_STAT_CLASS_DFLT;

    45

	station_classes[0].stations = 1;

    46

	station_classes[0].spec = malloc(sizeof(*station_classes[0].spec));

    47

	station_classes[0].spec[0] = NULL;

    48

    49

	station_classes[1].id = 'WAYP';

    50

	station_classes[1].name = STR_STAT_CLASS_WAYP;

    51

	station_classes[1].stations = 1;

    52

	station_classes[1].spec = malloc(sizeof(*station_classes[1].spec));

    53

	station_classes[1].spec[0] = NULL;

    54

}

    55

    56

/**

    57

 * Allocate a station class for the given class id.

    58

 * @param classid A 32 bit value identifying the class.

    59

 * @return Index into station_classes of allocated class.

    60

 */

    61

StationClassID AllocateStationClass(uint32 class)

    62

{

    63

	StationClassID i;

    64

    65

	for (i = 0; i < STAT_CLASS_MAX; i++) {

    66

		if (station_classes[i].id == class) {

    67

			// ClassID is already allocated, so reuse it.

    68

			return i;

    69

		} else if (station_classes[i].id == 0) {

    70

			// This class is empty, so allocate it to the ClassID.

    71

			station_classes[i].id = class;

    72

			return i;

    73

		}

    74

	}

    75

    76

	DEBUG(grf, 2)("StationClassAllocate: Already allocated %d classes, using default.", STAT_CLASS_MAX);

    77

	return STAT_CLASS_DFLT;

    78

}

    79

    80

/** Set the name of a custom station class */

    81

void SetStationClassName(StationClassID sclass, StringID name)

    82

{

    83

	assert(sclass < STAT_CLASS_MAX);

    84

	station_classes[sclass].name = name;

    85

}

    86

    87

/** Retrieve the name of a custom station class */

    88

StringID GetStationClassName(StationClassID sclass)

    89

{

    90

	assert(sclass < STAT_CLASS_MAX);

    91

	return station_classes[sclass].name;

    92

}

    93

    94

/** Build a list of station class name StringIDs to use in a dropdown list

    95

 * @return Pointer to a (static) array of StringIDs

    96

 */

    97

StringID *BuildStationClassDropdown(void)

    98

{

    99

	/* Allow room for all station classes, plus a terminator entry */

   100

	static StringID names[STAT_CLASS_MAX + 1];

   101

	uint i;

   102

   103

	/* Add each name */

   104

	for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++) {

   105

		names[i] = station_classes[i].name;

   106

	}

   107

	/* Terminate the list */

   108

	names[i] = INVALID_STRING_ID;

   109

   110

	return names;

   111

}

   112

   113

/**

   114

 * Get the number of station classes in use.

   115

 * @return Number of station classes.

   116

 */

   117

uint GetNumStationClasses(void)

   118

{

   119

	uint i;

   120

	for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++);

   121

	return i;

   122

}

   123

   124

/**

   125

 * Return the number of stations for the given station class.

   126

 * @param sclass Index of the station class.

   127

 * @return Number of stations in the class.

   128

 */

   129

uint GetNumCustomStations(StationClassID sclass)

   130

{

   131

	assert(sclass < STAT_CLASS_MAX);

   132

	return station_classes[sclass].stations;

   133

}

   134

   135

/**

   136

 * Tie a station spec to its station class.

   137

 * @param spec The station spec.

   138

 */

   139

void SetCustomStationSpec(StationSpec *statspec)

   140

{

   141

	StationClass *station_class;

   142

	int i;

   143

   144

	/* If the station has already been allocated, don't reallocate it. */

   145

	if (statspec->allocated) return;

   146

   147

	assert(statspec->sclass < STAT_CLASS_MAX);

   148

	station_class = &station_classes[statspec->sclass];

   149

   150

	i = station_class->stations++;

   151

	station_class->spec = realloc(station_class->spec, station_class->stations * sizeof(*station_class->spec));

   152

   153

	station_class->spec[i] = statspec;

   154

	statspec->allocated = true;

   155

}

   156

   157

/**

   158

 * Retrieve a station spec from a class.

   159

 * @param sclass Index of the station class.

   160

 * @param station The station index with the class.

   161

 * @return The station spec.

   162

 */

   163

const StationSpec *GetCustomStationSpec(StationClassID sclass, uint station)

   164

{

   165

	assert(sclass < STAT_CLASS_MAX);

   166

	if (station < station_classes[sclass].stations)

   167

		return station_classes[sclass].spec[station];

   168

   169

	// If the custom station isn't defined any more, then the GRF file

   170

	// probably was not loaded.

   171

	return NULL;

   172

}

   173

   174

   175

const StationSpec *GetCustomStationSpecByGrf(uint32 grfid, byte localidx)

   176

{

   177

	StationClassID i;

   178

	uint j;

   179

   180

	for (i = STAT_CLASS_DFLT; i < STAT_CLASS_MAX; i++) {

   181

		for (j = 0; j < station_classes[i].stations; j++) {

   182

			const StationSpec *statspec = station_classes[i].spec[j];

   183

			if (statspec == NULL) continue;

   184

			if (statspec->grfid == grfid && statspec->localidx == localidx) return statspec;

   185

		}

   186

	}

   187

   188

	return NULL;

   189

}

   190

   191

   192

/* Evaluate a tile's position within a station, and return the result a bitstuffed format.

   193

 * if not centred: .TNLcCpP, if centred: .TNL..CP

   194

 * T = Tile layout number (GetStationGfx), N = Number of platforms, L = Length of platforms

   195

 * C = Current platform number from start, c = from end

   196

 * P = Position along platform from start, p = from end

   197

 * if centred, C/P start from the centre and c/p are not available.

   198

 */

   199

uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred)

   200

{

   201

	uint32 retval = 0;

   202

   203

	if (axis == AXIS_X) {

   204

		intswap(platforms, length);

   205

		intswap(x, y);

   206

	}

   207

   208

	/* Limit our sizes to 4 bits */

   209

	platforms = min(15, platforms);

   210

	length    = min(15, length);

   211

	x = min(15, x);

   212

	y = min(15, y);

   213

	if (centred) {

   214

		x -= platforms / 2;

   215

		y -= length / 2;

   216

		SB(retval,  0, 4, y & 0xF);

   217

		SB(retval,  4, 4, x & 0xF);

   218

	} else {

   219

		SB(retval,  0, 4, y);

   220

		SB(retval,  4, 4, length - y - 1);

   221

		SB(retval,  8, 4, x);

   222

		SB(retval, 12, 4, platforms - x - 1);

   223

	}

   224

	SB(retval, 16, 4, length);

   225

	SB(retval, 20, 4, platforms);

   226

	SB(retval, 24, 4, tile);

   227

   228

	return retval;

   229

}

   230

   231

   232

/* Find the end of a railway station, from the tile, in the direction of delta.

   233

 * If check_type is set, we stop if the custom station type changes.

   234

 * If check_axis is set, we stop if the station direction changes.

   235

 */

   236

static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)

   237

{

   238

	bool waypoint;

   239

	byte orig_type = 0;

   240

	Axis orig_axis = AXIS_X;

   241

   242

	waypoint = IsTileType(tile, MP_RAILWAY);

   243

   244

	if (waypoint) {

   245

		if (check_axis) orig_axis = GetWaypointAxis(tile);

   246

	} else {

   247

		if (check_type) orig_type = GetCustomStationSpecIndex(tile);

   248

		if (check_axis) orig_axis = GetRailStationAxis(tile);

   249

	}

   250

   251

	while (true) {

   252

		TileIndex new_tile = TILE_ADD(tile, delta);

   253

   254

		if (waypoint) {

   255

			if (!IsTileType(new_tile, MP_RAILWAY)) break;

   256

			if (!IsRailWaypoint(new_tile)) break;

   257

			if (check_axis && GetWaypointAxis(new_tile) != orig_axis) break;

   258

		} else {

   259

			if (!IsRailwayStationTile(new_tile)) break;

   260

			if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break;

   261

			if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break;

   262

		}

   263

   264

		tile = new_tile;

   265

	}

   266

	return tile;

   267

}

   268

   269

   270

static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred)

   271

{

   272

	int tx = TileX(tile);

   273

	int ty = TileY(tile);

   274

	int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1,  0), check_type, check_axis));

   275

	int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis));

   276

	int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1,  0), check_type, check_axis)) + 1;

   277

	int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0,  1), check_type, check_axis)) + 1;

   278

	Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile);

   279

   280

	tx -= sx; ex -= sx;

   281

	ty -= sy; ey -= sy;

   282

   283

	return GetPlatformInfo(axis, IsTileType(tile, MP_RAILWAY) ? 2 : GetStationGfx(tile), ex, ey, tx, ty, centred);

   284

}

   285

   286

   287

/* Station Resolver Functions */

   288

static uint32 StationGetRandomBits(const ResolverObject *object)

   289

{

   290

	const Station *st = object->u.station.st;

   291

	const TileIndex tile = object->u.station.tile;

   292

	return (st == NULL ? 0 : st->random_bits) | (tile == INVALID_TILE ? 0 : GetStationTileRandomBits(tile) << 16);

   293

}

   294

   295

   296

static uint32 StationGetTriggers(const ResolverObject *object)

   297

{

   298

	const Station *st = object->u.station.st;

   299

	return st == NULL ? 0 : st->waiting_triggers;

   300

}

   301

   302

   303

static void StationSetTriggers(const ResolverObject *object, int triggers)

   304

{

   305

	Station *st = (Station*)object->u.station.st;

   306

	assert(st != NULL);

   307

	st->waiting_triggers = triggers;

   308

}

   309

   310

   311

static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)

   312

{

   313

	const Station *st = object->u.station.st;

   314

	TileIndex tile = object->u.station.tile;

   315

   316

	if (st == NULL) {

   317

		/* Station does not exist, so we're in a purchase list */

   318

		switch (variable) {

   319

			case 0x40:

   320

			case 0x41:

   321

			case 0x46:

   322

			case 0x47:

   323

			case 0x49: return 0x2110000;       /* Platforms, tracks & position */

   324

			case 0x42: return 0;               /* Rail type (XXX Get current type from GUI?) */

   325

			case 0x43: return _current_player; /* Station owner */

   326

			case 0x44: return 2;               /* PBS status */

   327

			case 0xFA: return _date;           /* Build date */

   328

		}

   329

   330

		*available = false;

   331

		return -1;

   332

	}

   333

   334

	switch (variable) {

   335

		/* Calculated station variables */

   336

		case 0x40: return GetPlatformInfoHelper(tile, false, false, false);

   337

		case 0x41: return GetPlatformInfoHelper(tile, true,  false, false);

   338

		case 0x42: /* Terrain and rail type */

   339

			return ((_opt.landscape == LT_HILLY && GetTileZ(tile) > _opt.snow_line) ? 4 : 0) |

   340

			       (GetRailType(tile) << 8);

   341

		case 0x43: return st->owner; /* Station owner */

   342

		case 0x44: return 2;         /* PBS status */

   343

		case 0x46: return GetPlatformInfoHelper(tile, false, false, true);

   344

		case 0x47: return GetPlatformInfoHelper(tile, true,  false, true);

   345

		case 0x48: { /* Accepted cargo types */

   346

			CargoID cargo_type;

   347

			uint32 value = 0;

   348

   349

			for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {

   350

				if (HASBIT(st->goods[cargo_type].waiting_acceptance, 15)) SETBIT(value, cargo_type);

   351

			}

   352

			return value;

   353

		}

   354

		case 0x49: return GetPlatformInfoHelper(tile, false, true, false);

   355

   356

		/* Variables which use the parameter */

   357

		case 0x60: return GB(st->goods[parameter].waiting_acceptance, 0, 12);

   358

		case 0x61: return st->goods[parameter].days_since_pickup;

   359

		case 0x62: return st->goods[parameter].rating;

   360

		case 0x63: return st->goods[parameter].enroute_time;

   361

		case 0x64: return st->goods[parameter].last_speed | (st->goods[parameter].last_age << 8);

   362

   363

		/* General station properties */

   364

		case 0x82: return 50;

   365

		case 0x84: return st->string_id;

   366

		case 0x86: return 0;

   367

		case 0x8A: return st->had_vehicle_of_type;

   368

		case 0xF0: return st->facilities;

   369

		case 0xF1: return st->airport_type;

   370

		case 0xF2: return st->truck_stops->status;

   371

		case 0xF3: return st->bus_stops->status;

   372

		case 0xF6: return st->airport_flags;

   373

		case 0xF7: return st->airport_flags & 0xFF;

   374

		case 0xFA: return st->build_date;

   375

	}

   376

   377

	/* Handle cargo variables (deprecated) */

   378

	if (variable >= 0x8C && variable <= 0xEC) {

   379

		const GoodsEntry *g = &st->goods[GB(variable - 0x8C, 3, 4)];

   380

		switch (GB(variable - 0x8C, 0, 3)) {

   381

			case 0: return g->waiting_acceptance;

   382

			case 1: return g->waiting_acceptance & 0xFF;

   383

			case 2: return g->days_since_pickup;

   384

			case 3: return g->rating;

   385

			case 4: return g->enroute_from;

   386

			case 5: return g->enroute_time;

   387

			case 6: return g->last_speed;

   388

			case 7: return g->last_age;

   389

		}

   390

	}

   391

   392

	DEBUG(grf, 1)("Unhandled station property 0x%X", variable);

   393

   394

	*available = false;

   395

	return -1;

   396

}

   397

   398

   399

static const SpriteGroup *StationResolveReal(const ResolverObject *object, const SpriteGroup *group)

   400

{

   401

	const Station *st = object->u.station.st;

   402

	const StationSpec *statspec = object->u.station.statspec;

   403

	uint set;

   404

   405

	uint cargo = 0;

   406

	CargoID cargo_type = CT_INVALID; /* XXX Pick the correct cargo type */

   407

   408

	if (st == NULL || statspec->sclass == STAT_CLASS_WAYP) {

   409

		return group->g.real.loading[0];

   410

	}

   411

   412

	if (cargo_type == CT_INVALID) {

   413

		for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {

   414

			cargo += GB(st->goods[cargo_type].waiting_acceptance, 0, 12);

   415

		}

   416

	} else {

   417

		cargo = GB(st->goods[cargo_type].waiting_acceptance, 0, 12);

   418

	}

   419

   420

	if (HASBIT(statspec->flags, 1)) cargo /= (st->trainst_w + st->trainst_h);

   421

	cargo = min(0xfff, cargo);

   422

   423

	if (cargo > statspec->cargo_threshold) {

   424

		if (group->g.real.num_loading > 0) {

   425

			set = ((cargo - statspec->cargo_threshold) * group->g.real.num_loading) / (4096 - statspec->cargo_threshold);

   426

			return group->g.real.loading[set];

   427

		}

   428

	} else {

   429

		if (group->g.real.num_loaded > 0) {

   430

			set = (cargo * group->g.real.num_loaded) / (statspec->cargo_threshold + 1);

   431

			return group->g.real.loaded[set];

   432

		}

   433

	}

   434

   435

	return group->g.real.loading[0];

   436

}

   437

   438

   439

static void NewStationResolver(ResolverObject *res, const StationSpec *statspec, const Station *st, TileIndex tile)

   440

{

   441

	res->GetRandomBits = StationGetRandomBits;

   442

	res->GetTriggers   = StationGetTriggers;

   443

	res->SetTriggers   = StationSetTriggers;

   444

	res->GetVariable   = StationGetVariable;

   445

	res->ResolveReal   = StationResolveReal;

   446

   447

	res->u.station.st       = st;

   448

	res->u.station.statspec = statspec;

   449

	res->u.station.tile     = tile;

   450

   451

	res->callback        = 0;

   452

	res->callback_param1 = 0;

   453

	res->callback_param2 = 0;

   454

	res->last_value      = 0;

   455

	res->trigger         = 0;

   456

	res->reseed          = 0;

   457

}

   458

   459

   460

SpriteID GetCustomStationRelocation(const StationSpec *statspec, const Station *st, TileIndex tile)

   461

{

   462

	const SpriteGroup *group;

   463

	ResolverObject object;

   464

	CargoID ctype = (st == NULL) ? GC_PURCHASE : GC_DEFAULT_NA;

   465

   466

	NewStationResolver(&object, statspec, st, tile);

   467

   468

	group = Resolve(statspec->spritegroup[ctype], &object);

   469

	if ((group == NULL || group->type != SGT_RESULT) && ctype != GC_DEFAULT_NA) {

   470

		group = Resolve(statspec->spritegroup[GC_DEFAULT_NA], &object);

   471

	}

   472

	if ((group == NULL || group->type != SGT_RESULT) && ctype != GC_DEFAULT) {

   473

		group = Resolve(statspec->spritegroup[GC_DEFAULT], &object);

   474

	}

   475

   476

	if (group == NULL || group->type != SGT_RESULT) return 0;

   477

   478

	return group->g.result.sprite - 0x42D;

   479

}

   480

   481

   482

SpriteID GetCustomStationGroundRelocation(const StationSpec *statspec, const Station *st, TileIndex tile)

   483

{

   484

	const SpriteGroup *group;

   485

	ResolverObject object;

   486

	CargoID ctype = (st == NULL) ? GC_PURCHASE : GC_DEFAULT_NA;

   487

   488

	NewStationResolver(&object, statspec, st, tile);

   489

	object.callback_param1 = 1; /* Indicate we are resolving the ground sprite */

   490

   491

	group = Resolve(statspec->spritegroup[ctype], &object);

   492

	if ((group == NULL || group->type != SGT_RESULT) && ctype != GC_DEFAULT_NA) {

   493

		group = Resolve(statspec->spritegroup[GC_DEFAULT_NA], &object);

   494

	}

   495

	if ((group == NULL || group->type != SGT_RESULT) && ctype != GC_DEFAULT) {

   496

		group = Resolve(statspec->spritegroup[GC_DEFAULT], &object);

   497

	}