peter1138@2625: /* $Id$ */
peter1138@2625: 
peter1138@2963: /** @file newgrf_station.c Functions for dealing with station classes and custom stations. */
peter1138@2625: 
peter1138@2625: #include "stdafx.h"
peter1138@2625: #include "openttd.h"
peter1138@3743: #include "variables.h"
peter1138@3764: #include "functions.h"
peter1138@2625: #include "debug.h"
peter1138@2625: #include "sprite.h"
peter1138@3764: #include "table/sprites.h"
peter1138@3594: #include "table/strings.h"
peter1138@2967: #include "station.h"
peter1138@3587: #include "station_map.h"
Darkvater@5568: #include "newgrf.h"
peter1138@3752: #include "newgrf_callbacks.h"
peter1138@2963: #include "newgrf_station.h"
peter1138@3743: #include "newgrf_spritegroup.h"
rubidium@4261: #include "date.h"
peter1138@2625: 
peter1138@2625: static StationClass station_classes[STAT_CLASS_MAX];
peter1138@2625: 
peter1138@3786: enum {
peter1138@3786: 	MAX_SPECLIST = 255,
peter1138@3786: };
peter1138@3786: 
peter1138@2625: /**
peter1138@2625:  * Reset station classes to their default state.
peter1138@2625:  * This includes initialising the Default and Waypoint classes with an empty
peter1138@2625:  * entry, for standard stations and waypoints.
peter1138@2625:  */
peter1138@2625: void ResetStationClasses(void)
peter1138@2625: {
peter1138@2625: 	StationClassID i;
peter1138@2625: 	for (i = 0; i < STAT_CLASS_MAX; i++) {
peter1138@2625: 		station_classes[i].id = 0;
peter1138@3594: 		station_classes[i].name = STR_EMPTY;
peter1138@2625: 		station_classes[i].stations = 0;
peter1138@2625: 
peter1138@2625: 		free(station_classes[i].spec);
peter1138@2625: 		station_classes[i].spec = NULL;
peter1138@2625: 	}
peter1138@2625: 
peter1138@2625: 	// Set up initial data
peter1138@2625: 	station_classes[0].id = 'DFLT';
peter1138@3594: 	station_classes[0].name = STR_STAT_CLASS_DFLT;
peter1138@2625: 	station_classes[0].stations = 1;
peter1138@2625: 	station_classes[0].spec = malloc(sizeof(*station_classes[0].spec));
peter1138@2625: 	station_classes[0].spec[0] = NULL;
peter1138@2625: 
peter1138@2625: 	station_classes[1].id = 'WAYP';
peter1138@3594: 	station_classes[1].name = STR_STAT_CLASS_WAYP;
peter1138@2625: 	station_classes[1].stations = 1;
peter1138@2625: 	station_classes[1].spec = malloc(sizeof(*station_classes[1].spec));
peter1138@2625: 	station_classes[1].spec[0] = NULL;
peter1138@2625: }
peter1138@2625: 
peter1138@2625: /**
peter1138@2625:  * Allocate a station class for the given class id.
peter1138@2625:  * @param classid A 32 bit value identifying the class.
peter1138@2625:  * @return Index into station_classes of allocated class.
peter1138@2625:  */
peter1138@2625: StationClassID AllocateStationClass(uint32 class)
peter1138@2625: {
peter1138@2625: 	StationClassID i;
peter1138@2625: 
peter1138@2625: 	for (i = 0; i < STAT_CLASS_MAX; i++) {
peter1138@2625: 		if (station_classes[i].id == class) {
peter1138@2625: 			// ClassID is already allocated, so reuse it.
peter1138@2625: 			return i;
peter1138@2625: 		} else if (station_classes[i].id == 0) {
peter1138@2625: 			// This class is empty, so allocate it to the ClassID.
peter1138@2625: 			station_classes[i].id = class;
peter1138@2625: 			return i;
peter1138@2625: 		}
peter1138@2625: 	}
peter1138@2625: 
Darkvater@5568: 	grfmsg(2, "StationClassAllocate: already allocated %d classes, using default", STAT_CLASS_MAX);
peter1138@2625: 	return STAT_CLASS_DFLT;
peter1138@2625: }
peter1138@2625: 
peter1138@3642: /** Set the name of a custom station class */
peter1138@3642: void SetStationClassName(StationClassID sclass, StringID name)
peter1138@3642: {
peter1138@3642: 	assert(sclass < STAT_CLASS_MAX);
peter1138@3642: 	station_classes[sclass].name = name;
peter1138@3642: }
peter1138@3642: 
peter1138@3642: /** Retrieve the name of a custom station class */
peter1138@3642: StringID GetStationClassName(StationClassID sclass)
peter1138@3642: {
peter1138@3642: 	assert(sclass < STAT_CLASS_MAX);
peter1138@3642: 	return station_classes[sclass].name;
peter1138@3642: }
peter1138@3642: 
peter1138@3642: /** Build a list of station class name StringIDs to use in a dropdown list
peter1138@3642:  * @return Pointer to a (static) array of StringIDs
peter1138@3642:  */
peter1138@3642: StringID *BuildStationClassDropdown(void)
peter1138@3642: {
peter1138@3642: 	/* Allow room for all station classes, plus a terminator entry */
peter1138@3642: 	static StringID names[STAT_CLASS_MAX + 1];
peter1138@3642: 	uint i;
peter1138@3642: 
peter1138@3642: 	/* Add each name */
peter1138@3642: 	for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++) {
peter1138@3642: 		names[i] = station_classes[i].name;
peter1138@3642: 	}
peter1138@3642: 	/* Terminate the list */
peter1138@3642: 	names[i] = INVALID_STRING_ID;
peter1138@3642: 
peter1138@3642: 	return names;
peter1138@3642: }
peter1138@3642: 
peter1138@2625: /**
peter1138@3587:  * Get the number of station classes in use.
peter1138@3587:  * @return Number of station classes.
peter1138@3587:  */
peter1138@3587: uint GetNumStationClasses(void)
peter1138@3587: {
peter1138@3587: 	uint i;
peter1138@3587: 	for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++);
peter1138@3587: 	return i;
peter1138@3587: }
peter1138@3587: 
peter1138@3587: /**
peter1138@2625:  * Return the number of stations for the given station class.
peter1138@2625:  * @param sclass Index of the station class.
peter1138@2625:  * @return Number of stations in the class.
peter1138@2625:  */
peter1138@2625: uint GetNumCustomStations(StationClassID sclass)
peter1138@2625: {
peter1138@2625: 	assert(sclass < STAT_CLASS_MAX);
peter1138@2625: 	return station_classes[sclass].stations;
peter1138@2625: }
peter1138@2625: 
peter1138@2625: /**
peter1138@2625:  * Tie a station spec to its station class.
peter1138@2625:  * @param spec The station spec.
peter1138@2625:  */
belugas@3676: void SetCustomStationSpec(StationSpec *statspec)
peter1138@2625: {
peter1138@2625: 	StationClass *station_class;
peter1138@2625: 	int i;
peter1138@2625: 
peter1138@3780: 	/* If the station has already been allocated, don't reallocate it. */
peter1138@3780: 	if (statspec->allocated) return;
peter1138@3780: 
belugas@3676: 	assert(statspec->sclass < STAT_CLASS_MAX);
belugas@3676: 	station_class = &station_classes[statspec->sclass];
peter1138@2625: 
peter1138@2625: 	i = station_class->stations++;
peter1138@2625: 	station_class->spec = realloc(station_class->spec, station_class->stations * sizeof(*station_class->spec));
peter1138@2625: 
belugas@3676: 	station_class->spec[i] = statspec;
peter1138@3780: 	statspec->allocated = true;
peter1138@2625: }
peter1138@2625: 
peter1138@2625: /**
peter1138@2625:  * Retrieve a station spec from a class.
peter1138@2625:  * @param sclass Index of the station class.
peter1138@2625:  * @param station The station index with the class.
peter1138@2625:  * @return The station spec.
peter1138@2625:  */
belugas@3676: const StationSpec *GetCustomStationSpec(StationClassID sclass, uint station)
peter1138@2625: {
peter1138@2625: 	assert(sclass < STAT_CLASS_MAX);
peter1138@2625: 	if (station < station_classes[sclass].stations)
peter1138@2625: 		return station_classes[sclass].spec[station];
peter1138@2625: 
peter1138@2625: 	// If the custom station isn't defined any more, then the GRF file
peter1138@2625: 	// probably was not loaded.
peter1138@2625: 	return NULL;
peter1138@2625: }
peter1138@2967: 
peter1138@2967: 
peter1138@3765: const StationSpec *GetCustomStationSpecByGrf(uint32 grfid, byte localidx)
peter1138@3765: {
peter1138@3765: 	StationClassID i;
peter1138@3765: 	uint j;
peter1138@3765: 
peter1138@3765: 	for (i = STAT_CLASS_DFLT; i < STAT_CLASS_MAX; i++) {
peter1138@3765: 		for (j = 0; j < station_classes[i].stations; j++) {
peter1138@3765: 			const StationSpec *statspec = station_classes[i].spec[j];
peter1138@3765: 			if (statspec == NULL) continue;
peter1138@3765: 			if (statspec->grfid == grfid && statspec->localidx == localidx) return statspec;
peter1138@3765: 		}
peter1138@3765: 	}
peter1138@3765: 
peter1138@3765: 	return NULL;
peter1138@3765: }
peter1138@3765: 
peter1138@3765: 
peter1138@3756: /* Evaluate a tile's position within a station, and return the result a bitstuffed format.
peter1138@3756:  * if not centred: .TNLcCpP, if centred: .TNL..CP
peter1138@3756:  * T = Tile layout number (GetStationGfx), N = Number of platforms, L = Length of platforms
peter1138@3756:  * C = Current platform number from start, c = from end
peter1138@3756:  * P = Position along platform from start, p = from end
peter1138@3756:  * if centred, C/P start from the centre and c/p are not available.
peter1138@3756:  */
peter1138@3756: uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred)
peter1138@3756: {
peter1138@3756: 	uint32 retval = 0;
peter1138@3756: 
peter1138@3756: 	if (axis == AXIS_X) {
peter1138@3756: 		intswap(platforms, length);
peter1138@3756: 		intswap(x, y);
peter1138@3756: 	}
peter1138@3756: 
peter1138@3756: 	/* Limit our sizes to 4 bits */
peter1138@3756: 	platforms = min(15, platforms);
peter1138@3756: 	length    = min(15, length);
peter1138@3756: 	x = min(15, x);
peter1138@3756: 	y = min(15, y);
peter1138@3756: 	if (centred) {
peter1138@3756: 		x -= platforms / 2;
peter1138@3756: 		y -= length / 2;
peter1138@3790: 		SB(retval,  0, 4, y & 0xF);
peter1138@3790: 		SB(retval,  4, 4, x & 0xF);
peter1138@3756: 	} else {
peter1138@3756: 		SB(retval,  0, 4, y);
peter1138@3756: 		SB(retval,  4, 4, length - y - 1);
peter1138@3756: 		SB(retval,  8, 4, x);
peter1138@3756: 		SB(retval, 12, 4, platforms - x - 1);
peter1138@3756: 	}
peter1138@3756: 	SB(retval, 16, 4, length);
peter1138@3756: 	SB(retval, 20, 4, platforms);
peter1138@3756: 	SB(retval, 24, 4, tile);
peter1138@3756: 
peter1138@3756: 	return retval;
peter1138@3756: }
peter1138@3756: 
peter1138@3756: 
peter1138@3756: /* Find the end of a railway station, from the tile, in the direction of delta.
peter1138@3756:  * If check_type is set, we stop if the custom station type changes.
peter1138@3756:  * If check_axis is set, we stop if the station direction changes.
peter1138@3756:  */
peter1138@3756: static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)
peter1138@3756: {
peter1138@3756: 	bool waypoint;
peter1138@3756: 	byte orig_type = 0;
peter1138@3756: 	Axis orig_axis = AXIS_X;
peter1138@3756: 
peter1138@3756: 	waypoint = IsTileType(tile, MP_RAILWAY);
peter1138@3756: 
peter1138@3756: 	if (waypoint) {
peter1138@3756: 		if (check_axis) orig_axis = GetWaypointAxis(tile);
peter1138@3756: 	} else {
peter1138@3756: 		if (check_type) orig_type = GetCustomStationSpecIndex(tile);
peter1138@3756: 		if (check_axis) orig_axis = GetRailStationAxis(tile);
peter1138@3756: 	}
peter1138@3756: 
peter1138@3756: 	while (true) {
peter1138@3756: 		TileIndex new_tile = TILE_ADD(tile, delta);
peter1138@3756: 
peter1138@3756: 		if (waypoint) {
peter1138@3756: 			if (!IsTileType(new_tile, MP_RAILWAY)) break;
tron@4182: 			if (!IsRailWaypoint(new_tile)) break;
peter1138@3756: 			if (check_axis && GetWaypointAxis(new_tile) != orig_axis) break;
peter1138@3756: 		} else {
peter1138@3756: 			if (!IsRailwayStationTile(new_tile)) break;
peter1138@3756: 			if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break;
peter1138@3756: 			if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break;
peter1138@3756: 		}
peter1138@3756: 
peter1138@3756: 		tile = new_tile;
peter1138@3756: 	}
peter1138@3756: 	return tile;
peter1138@3756: }
peter1138@3756: 
peter1138@3756: 
peter1138@3756: static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred)
peter1138@3756: {
peter1138@3756: 	int tx = TileX(tile);
peter1138@3756: 	int ty = TileY(tile);
peter1138@3756: 	int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1,  0), check_type, check_axis));
peter1138@3756: 	int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis));
peter1138@3756: 	int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1,  0), check_type, check_axis)) + 1;
peter1138@3756: 	int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0,  1), check_type, check_axis)) + 1;
peter1138@3756: 	Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile);
peter1138@3756: 
peter1138@3756: 	tx -= sx; ex -= sx;
peter1138@3756: 	ty -= sy; ey -= sy;
peter1138@3756: 
peter1138@3756: 	return GetPlatformInfo(axis, IsTileType(tile, MP_RAILWAY) ? 2 : GetStationGfx(tile), ex, ey, tx, ty, centred);
peter1138@3756: }
peter1138@3756: 
peter1138@3756: 
celestar@5592: static uint32 GetRailContinuationInfo(TileIndex tile)
celestar@5592: {
celestar@5592: 	/* Tile offsets and exit dirs for X axis */
celestar@5592: 	static Direction x_dir[8] = { DIR_SW, DIR_NE, DIR_SE, DIR_NW, DIR_S, DIR_E, DIR_W, DIR_N };
celestar@5592: 	static DiagDirection x_exits[8] = { DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SW, DIAGDIR_NE };
celestar@5592: 
celestar@5592: 	/* Tile offsets and exit dirs for Y axis */
celestar@5592: 	static Direction y_dir[8] = { DIR_SE, DIR_NW, DIR_SW, DIR_NE, DIR_S, DIR_W, DIR_E, DIR_N };
celestar@5592: 	static DiagDirection y_exits[8] = { DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_NW };
celestar@5592: 
celestar@5592: 	Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile);
celestar@5592: 
celestar@5592: 	/* Choose appropriate lookup table to use */
celestar@5592: 	Direction *dir = axis == AXIS_X ? x_dir : y_dir;
celestar@5592: 	DiagDirection *diagdir = axis == AXIS_X ? x_exits : y_exits;
celestar@5592: 
celestar@5592: 	uint32 res = 0;
celestar@5592: 	uint i;
celestar@5592: 
celestar@5592: 	for (i = 0; i < lengthof(x_dir); i++, dir++, diagdir++) {
celestar@5592: 		uint32 ts = GetTileTrackStatus(tile + TileOffsByDir(*dir), TRANSPORT_RAIL);
celestar@5592: 		if (ts != 0) {
celestar@5592: 			/* If there is any track on the tile, set the bit in the second byte */
celestar@5592: 			SETBIT(res, i + 8);
celestar@5592: 
celestar@5592: 			/* If any track reaches our exit direction, set the bit in the lower byte */
celestar@5592: 			if (ts & DiagdirReachesTracks(*diagdir)) SETBIT(res, i);
celestar@5592: 		}
celestar@5592: 	}
celestar@5592: 
celestar@5592: 	return res;
celestar@5592: }
celestar@5592: 
celestar@5592: 
peter1138@3743: /* Station Resolver Functions */
peter1138@3743: static uint32 StationGetRandomBits(const ResolverObject *object)
peter1138@3743: {
peter1138@3743: 	const Station *st = object->u.station.st;
peter1138@3743: 	const TileIndex tile = object->u.station.tile;
peter1138@3743: 	return (st == NULL ? 0 : st->random_bits) | (tile == INVALID_TILE ? 0 : GetStationTileRandomBits(tile) << 16);
peter1138@3743: }
peter1138@2967: 
peter1138@3743: 
peter1138@3743: static uint32 StationGetTriggers(const ResolverObject *object)
peter1138@3743: {
peter1138@3743: 	const Station *st = object->u.station.st;
peter1138@3743: 	return st == NULL ? 0 : st->waiting_triggers;
peter1138@3743: }
peter1138@3743: 
peter1138@3743: 
peter1138@3743: static void StationSetTriggers(const ResolverObject *object, int triggers)
peter1138@3743: {
peter1138@3743: 	Station *st = (Station*)object->u.station.st;
peter1138@3743: 	assert(st != NULL);
peter1138@3743: 	st->waiting_triggers = triggers;
peter1138@3743: }
peter1138@3743: 
peter1138@3743: 
peter1138@3893: static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
peter1138@3743: {
peter1138@3743: 	const Station *st = object->u.station.st;
peter1138@3756: 	TileIndex tile = object->u.station.tile;
peter1138@3743: 
peter1138@3743: 	if (st == NULL) {
peter1138@3743: 		/* Station does not exist, so we're in a purchase list */
peter1138@3743: 		switch (variable) {
peter1138@3743: 			case 0x40:
peter1138@3743: 			case 0x41:
peter1138@3743: 			case 0x46:
peter1138@3743: 			case 0x47:
peter1138@3743: 			case 0x49: return 0x2110000;       /* Platforms, tracks & position */
peter1138@3743: 			case 0x42: return 0;               /* Rail type (XXX Get current type from GUI?) */
peter1138@3743: 			case 0x43: return _current_player; /* Station owner */
peter1138@3748: 			case 0x44: return 2;               /* PBS status */
rubidium@4331: 			case 0xFA: return max(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0); /* Build date */
peter1138@3743: 		}
peter1138@3893: 
peter1138@3893: 		*available = false;
peter1138@3893: 		return -1;
peter1138@3743: 	}
peter1138@3743: 
peter1138@3743: 	switch (variable) {
peter1138@3743: 		/* Calculated station variables */
peter1138@3756: 		case 0x40: return GetPlatformInfoHelper(tile, false, false, false);
peter1138@3756: 		case 0x41: return GetPlatformInfoHelper(tile, true,  false, false);
peter1138@3758: 		case 0x42: /* Terrain and rail type */
peter1138@3758: 			return ((_opt.landscape == LT_HILLY && GetTileZ(tile) > _opt.snow_line) ? 4 : 0) |
peter1138@3758: 			       (GetRailType(tile) << 8);
peter1138@3743: 		case 0x43: return st->owner; /* Station owner */
peter1138@3748: 		case 0x44: return 2;         /* PBS status */
celestar@5592: 		case 0x45: return GetRailContinuationInfo(tile);
peter1138@3756: 		case 0x46: return GetPlatformInfoHelper(tile, false, false, true);
peter1138@3756: 		case 0x47: return GetPlatformInfoHelper(tile, true,  false, true);
peter1138@3743: 		case 0x48: { /* Accepted cargo types */
peter1138@3743: 			CargoID cargo_type;
peter1138@3743: 			uint32 value = 0;
peter1138@3743: 
peter1138@3743: 			for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
peter1138@3743: 				if (HASBIT(st->goods[cargo_type].waiting_acceptance, 15)) SETBIT(value, cargo_type);
peter1138@2967: 			}
peter1138@3743: 			return value;
peter1138@2967: 		}
peter1138@3756: 		case 0x49: return GetPlatformInfoHelper(tile, false, true, false);
peter1138@2967: 
peter1138@3743: 		/* Variables which use the parameter */
peter1138@3743: 		case 0x60: return GB(st->goods[parameter].waiting_acceptance, 0, 12);
peter1138@3743: 		case 0x61: return st->goods[parameter].days_since_pickup;
peter1138@3743: 		case 0x62: return st->goods[parameter].rating;
peter1138@3743: 		case 0x63: return st->goods[parameter].enroute_time;
peter1138@3743: 		case 0x64: return st->goods[parameter].last_speed | (st->goods[parameter].last_age << 8);
celestar@5592: 		case 0x65: return GB(st->goods[parameter].waiting_acceptance, 12, 4);
peter1138@3743: 
peter1138@3743: 		/* General station properties */
peter1138@3743: 		case 0x82: return 50;
peter1138@3743: 		case 0x84: return st->string_id;
peter1138@3743: 		case 0x86: return 0;
peter1138@3746: 		case 0x8A: return st->had_vehicle_of_type;
peter1138@3743: 		case 0xF0: return st->facilities;
peter1138@3743: 		case 0xF1: return st->airport_type;
peter1138@3743: 		case 0xF2: return st->truck_stops->status;
peter1138@3743: 		case 0xF3: return st->bus_stops->status;
peter1138@3743: 		case 0xF6: return st->airport_flags;
peter1138@5172: 		case 0xF7: return GB(st->airport_flags, 8, 8);
rubidium@4331: 		case 0xFA: return max(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0);
peter1138@2967: 	}
peter1138@3743: 
peter1138@3746: 	/* Handle cargo variables (deprecated) */
peter1138@3746: 	if (variable >= 0x8C && variable <= 0xEC) {
peter1138@3746: 		const GoodsEntry *g = &st->goods[GB(variable - 0x8C, 3, 4)];
peter1138@3746: 		switch (GB(variable - 0x8C, 0, 3)) {
peter1138@3746: 			case 0: return g->waiting_acceptance;
peter1138@5172: 			case 1: return GB(g->waiting_acceptance, 8, 8);
peter1138@3746: 			case 2: return g->days_since_pickup;
peter1138@3746: 			case 3: return g->rating;
peter1138@3746: 			case 4: return g->enroute_from;
peter1138@3746: 			case 5: return g->enroute_time;
peter1138@3746: 			case 6: return g->last_speed;
peter1138@3746: 			case 7: return g->last_age;
peter1138@3746: 		}
peter1138@3746: 	}
peter1138@3746: 
Darkvater@5568: 	DEBUG(grf, 1, "Unhandled station property 0x%X", variable);
peter1138@3743: 
peter1138@3893: 	*available = false;
peter1138@3743: 	return -1;
peter1138@2967: }
peter1138@2967: 
peter1138@2967: 
peter1138@3743: static const SpriteGroup *StationResolveReal(const ResolverObject *object, const SpriteGroup *group)
peter1138@3743: {
peter1138@3743: 	const Station *st = object->u.station.st;
peter1138@3743: 	const StationSpec *statspec = object->u.station.statspec;
peter1138@3743: 	uint set;
peter1138@2967: 
peter1138@3743: 	uint cargo = 0;
peter1138@4817: 	CargoID cargo_type = object->u.station.cargo_type;
peter1138@3743: 
peter1138@3743: 	if (st == NULL || statspec->sclass == STAT_CLASS_WAYP) {
peter1138@3743: 		return group->g.real.loading[0];
peter1138@3743: 	}
peter1138@3743: 
peter1138@4817: 	switch (cargo_type) {
peter1138@4817: 		case GC_INVALID:
peter1138@4817: 		case GC_DEFAULT_NA:
peter1138@4817: 		case GC_PURCHASE:
peter1138@4817: 			cargo = 0;
peter1138@4817: 			break;
peter1138@4817: 
peter1138@4817: 		case GC_DEFAULT:
peter1138@4817: 			for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
peter1138@4817: 				cargo += GB(st->goods[cargo_type].waiting_acceptance, 0, 12);
peter1138@4817: 			}
peter1138@4817: 			break;
peter1138@4817: 
peter1138@4817: 		default:
peter1138@4817: 			cargo = GB(st->goods[_local_cargo_id_ctype[cargo_type]].waiting_acceptance, 0, 12);
peter1138@4817: 			break;
peter1138@3743: 	}
peter1138@3743: 
peter1138@3743: 	if (HASBIT(statspec->flags, 1)) cargo /= (st->trainst_w + st->trainst_h);
peter1138@3743: 	cargo = min(0xfff, cargo);
peter1138@3743: 
peter1138@3743: 	if (cargo > statspec->cargo_threshold) {
peter1138@3749: 		if (group->g.real.num_loading > 0) {
peter1138@3787: 			set = ((cargo - statspec->cargo_threshold) * group->g.real.num_loading) / (4096 - statspec->cargo_threshold);
peter1138@3749: 			return group->g.real.loading[set];
peter1138@3743: 		}
peter1138@3743: 	} else {
peter1138@3749: 		if (group->g.real.num_loaded > 0) {
peter1138@3749: 			set = (cargo * group->g.real.num_loaded) / (statspec->cargo_threshold + 1);
peter1138@3749: 			return group->g.real.loaded[set];
peter1138@3743: 		}
peter1138@3743: 	}
peter1138@3743: 
peter1138@3743: 	return group->g.real.loading[0];
peter1138@3743: }
peter1138@3743: 
peter1138@3743: 
peter1138@3743: static void NewStationResolver(ResolverObject *res, const StationSpec *statspec, const Station *st, TileIndex tile)
peter1138@3743: {
peter1138@3743: 	res->GetRandomBits = StationGetRandomBits;
peter1138@3743: 	res->GetTriggers   = StationGetTriggers;
peter1138@3743: 	res->SetTriggers   = StationSetTriggers;
peter1138@3743: 	res->GetVariable   = StationGetVariable;
peter1138@3743: 	res->ResolveReal   = StationResolveReal;
peter1138@3743: 
peter1138@3743: 	res->u.station.st       = st;
peter1138@3743: 	res->u.station.statspec = statspec;
peter1138@3743: 	res->u.station.tile     = tile;
peter1138@3743: 
peter1138@3743: 	res->callback        = 0;
peter1138@3743: 	res->callback_param1 = 0;
peter1138@3743: 	res->callback_param2 = 0;
peter1138@3743: 	res->last_value      = 0;
peter1138@3743: 	res->trigger         = 0;
peter1138@3743: 	res->reseed          = 0;
peter1138@3743: }
peter1138@3743: 
peter1138@4817: static const SpriteGroup *ResolveStation(const StationSpec *statspec, const Station *st, ResolverObject *object)
peter1138@4817: {
peter1138@4817: 	const SpriteGroup *group;
peter1138@4817: 	CargoID ctype = GC_DEFAULT_NA;
peter1138@4817: 
peter1138@4817: 	if (st == NULL) {
peter1138@4817: 		/* No station, so we are in a purchase list */
peter1138@4817: 		ctype = GC_PURCHASE;
peter1138@4817: 	} else {
peter1138@4817: 		CargoID cargo;
peter1138@4817: 
peter1138@4817: 		/* Pick the first cargo that we have waiting */
peter1138@4817: 		for (cargo = 0; cargo < NUM_GLOBAL_CID; cargo++) {
peter1138@4817: 			CargoID lcid = _local_cargo_id_ctype[cargo];
peter1138@4817: 			if (lcid != CT_INVALID && statspec->spritegroup[cargo] != NULL && GB(st->goods[lcid].waiting_acceptance, 0, 12) != 0) {
peter1138@4817: 				ctype = cargo;
peter1138@4817: 				break;
peter1138@4817: 			}
peter1138@4817: 		}
peter1138@4817: 	}
peter1138@4817: 
peter1138@4817: 	group = statspec->spritegroup[ctype];
peter1138@4817: 	if (group == NULL) {
peter1138@4817: 		ctype = GC_DEFAULT;
peter1138@4817: 		group = statspec->spritegroup[ctype];
peter1138@4817: 	}
peter1138@4817: 
peter1138@4817: 	if (group == NULL) return NULL;
peter1138@4817: 
peter1138@4817: 	/* Remember the cargo type we've picked */
peter1138@4817: 	object->u.station.cargo_type = ctype;
peter1138@4817: 
peter1138@4817: 	return Resolve(group, object);
peter1138@4817: }
peter1138@3743: 
peter1138@3751: SpriteID GetCustomStationRelocation(const StationSpec *statspec, const Station *st, TileIndex tile)
peter1138@3743: {
peter1138@3743: 	const SpriteGroup *group;
peter1138@3743: 	ResolverObject object;
peter1138@3743: 
peter1138@3743: 	NewStationResolver(&object, statspec, st, tile);
peter1138@3743: 
peter1138@4817: 	group = ResolveStation(statspec, st, &object);
peter1138@3743: 	if (group == NULL || group->type != SGT_RESULT) return 0;
peter1138@3775: 	return group->g.result.sprite - 0x42D;
peter1138@3775: }
peter1138@3775: 
peter1138@3775: 
peter1138@3775: SpriteID GetCustomStationGroundRelocation(const StationSpec *statspec, const Station *st, TileIndex tile)
peter1138@3775: {
peter1138@3775: 	const SpriteGroup *group;
peter1138@3775: 	ResolverObject object;
peter1138@3775: 
peter1138@3775: 	NewStationResolver(&object, statspec, st, tile);
peter1138@3775: 	object.callback_param1 = 1; /* Indicate we are resolving the ground sprite */
peter1138@3775: 
peter1138@4817: 	group = ResolveStation(statspec, st, &object);
peter1138@3775: 	if (group == NULL || group->type != SGT_RESULT) return 0;
peter1138@3775: 	return group->g.result.sprite - 0x42D;
peter1138@2967: }
peter1138@3587: 
peter1138@3587: 
peter1138@3752: uint16 GetStationCallback(uint16 callback, uint32 param1, uint32 param2, const StationSpec *statspec, const Station *st, TileIndex tile)
peter1138@3752: {
peter1138@3752: 	const SpriteGroup *group;
peter1138@3752: 	ResolverObject object;
peter1138@3752: 
peter1138@3752: 	NewStationResolver(&object, statspec, st, tile);
peter1138@3752: 
peter1138@3752: 	object.callback        = callback;
peter1138@3752: 	object.callback_param1 = param1;
peter1138@3752: 	object.callback_param2 = param2;
peter1138@3752: 
peter1138@4817: 	group = ResolveStation(statspec, st, &object);
peter1138@3752: 	if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
peter1138@3752: 	return group->g.callback.result;
peter1138@3752: }
peter1138@3752: 
peter1138@3752: 
peter1138@3587: /**
peter1138@3587:  * Allocate a StationSpec to a Station. This is called once per build operation.
peter1138@3587:  * @param spec StationSpec to allocate.
peter1138@3587:  * @param st Station to allocate it to.
peter1138@3587:  * @param exec Whether to actually allocate the spec.
peter1138@3587:  * @return Index within the Station's spec list, or -1 if the allocation failed.
peter1138@3587:  */
belugas@3676: int AllocateSpecToStation(const StationSpec *statspec, Station *st, bool exec)
peter1138@3587: {
peter1138@3587: 	uint i;
peter1138@3587: 
belugas@3676: 	if (statspec == NULL) return 0;
peter1138@3587: 
peter1138@3587: 	/* Check if this spec has already been allocated */
peter1138@3786: 	for (i = 1; i < st->num_specs && i < MAX_SPECLIST; i++) {
belugas@3676: 		if (st->speclist[i].spec == statspec) return i;
peter1138@3587: 	}
peter1138@3587: 
peter1138@3786: 	for (i = 1; i < st->num_specs && i < MAX_SPECLIST; i++) {
peter1138@3587: 		if (st->speclist[i].spec == NULL && st->speclist[i].grfid == 0) break;
peter1138@3587: 	}
peter1138@3587: 
peter1138@3786: 	if (i == MAX_SPECLIST) return -1;
peter1138@3587: 
peter1138@3730: 	if (exec) {
peter1138@3730: 		if (i >= st->num_specs) {
peter1138@3730: 			st->num_specs = i + 1;
peter1138@3730: 			st->speclist = realloc(st->speclist, st->num_specs * sizeof(*st->speclist));
peter1138@3730: 
peter1138@3730: 			if (st->num_specs == 2) {
peter1138@3730: 				/* Initial allocation */
peter1138@3730: 				st->speclist[0].spec     = NULL;
peter1138@3730: 				st->speclist[0].grfid    = 0;
peter1138@3730: 				st->speclist[0].localidx = 0;
peter1138@3587: 			}
peter1138@3730: 		}
peter1138@3587: 
peter1138@3730: 		st->speclist[i].spec     = statspec;
peter1138@3730: 		st->speclist[i].grfid    = statspec->grfid;
peter1138@3730: 		st->speclist[i].localidx = statspec->localidx;
peter1138@3587: 	}
peter1138@3587: 
peter1138@3730: 	return i;
peter1138@3587: }
peter1138@3587: 
peter1138@3587: 
peter1138@3587: /** Deallocate a StationSpec from a Station. Called when removing a single station tile.
peter1138@3587:  * @param st Station to work with.
peter1138@3587:  * @param specindex Index of the custom station within the Station's spec list.
peter1138@3587:  * @return Indicates whether the StationSpec was deallocated.
peter1138@3587:  */
tron@4190: void DeallocateSpecFromStation(Station* st, byte specindex)
peter1138@3587: {
peter1138@3587: 	/* specindex of 0 (default) is never freeable */
tron@4190: 	if (specindex == 0) return;
peter1138@3587: 
peter1138@3587: 	/* Check all tiles over the station to check if the specindex is still in use */
peter1138@3587: 	BEGIN_TILE_LOOP(tile, st->trainst_w, st->trainst_h, st->train_tile) {
peter1138@3587: 		if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st->index && IsRailwayStation(tile) && GetCustomStationSpecIndex(tile) == specindex) {
tron@4190: 			return;
peter1138@3587: 		}
peter1138@3587: 	} END_TILE_LOOP(tile, st->trainst_w, st->trainst_h, st->train_tile)
peter1138@3587: 
tron@4190: 	/* This specindex is no longer in use, so deallocate it */
tron@4190: 	st->speclist[specindex].spec     = NULL;
tron@4190: 	st->speclist[specindex].grfid    = 0;
tron@4190: 	st->speclist[specindex].localidx = 0;
peter1138@3587: 
tron@4190: 	/* If this was the highest spec index, reallocate */
tron@4190: 	if (specindex == st->num_specs - 1) {
tron@4190: 		for (; st->speclist[st->num_specs - 1].grfid == 0 && st->num_specs > 1; st->num_specs--);
peter1138@3587: 
tron@4190: 		if (st->num_specs > 1) {
tron@4190: 			st->speclist = realloc(st->speclist, st->num_specs * sizeof(*st->speclist));
tron@4190: 		} else {
tron@4190: 			free(st->speclist);
tron@4190: 			st->num_specs = 0;
tron@4190: 			st->speclist  = NULL;
peter1138@3587: 		}
peter1138@3587: 	}
peter1138@3587: }
peter1138@3764: 
peter1138@3764: /** Draw representation of a station tile for GUI purposes.
peter1138@3764:  * @param x, y Position of image.
peter1138@3764:  * @param dir Direction.
peter1138@3764:  * @param railtype Rail type.
peter1138@3764:  * @param sclass, station Type of station.
peter1138@3764:  * @return True if the tile was drawn (allows for fallback to default graphic)
peter1138@3764:  */
peter1138@3764: bool DrawStationTile(int x, int y, RailType railtype, Axis axis, StationClassID sclass, uint station)
peter1138@3764: {
peter1138@3764: 	const StationSpec *statspec;
peter1138@3764: 	const DrawTileSprites *sprites;
peter1138@3764: 	const DrawTileSeqStruct *seq;
peter1138@3764: 	const RailtypeInfo *rti = GetRailTypeInfo(railtype);
peter1138@3764: 	SpriteID relocation;
peter1138@3764: 	PalSpriteID image;
peter1138@3764: 	PalSpriteID colourmod = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(_local_player));
peter1138@3764: 	uint tile = 2;
peter1138@3764: 
peter1138@3764: 	statspec = GetCustomStationSpec(sclass, station);
peter1138@3764: 	if (statspec == NULL) return false;
peter1138@3764: 
peter1138@3764: 	relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE);
peter1138@3764: 
peter1138@3764: 	if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) {
peter1138@3764: 		uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0x2110000, 0, statspec, NULL, INVALID_TILE);
peter1138@3764: 		if (callback != CALLBACK_FAILED) tile = callback;
peter1138@3764: 	}
peter1138@3764: 
peter1138@3764: 	if (statspec->renderdata == NULL) {
peter1138@3764: 		sprites = GetStationTileLayout(tile + axis);
peter1138@3764: 	} else {
peter1138@3764: 		sprites = &statspec->renderdata[(tile < statspec->tiles) ? tile + axis : axis];
peter1138@3764: 	}
peter1138@3764: 
peter1138@3764: 	image = sprites->ground_sprite;
peter1138@3775: 	if (HASBIT(image, 31)) {
peter1138@3775: 		CLRBIT(image, 31);
peter1138@3775: 		image += GetCustomStationGroundRelocation(statspec, NULL, INVALID_TILE);
peter1138@3775: 		image += rti->custom_ground_offset;
peter1138@3775: 	} else {
peter1138@3775: 		image += rti->total_offset;
peter1138@3775: 	}
peter1138@3764: 
peter1138@3764: 	if (image & PALETTE_MODIFIER_COLOR) image &= SPRITE_MASK;
peter1138@3764: 	DrawSprite(image, x, y);
peter1138@3764: 
peter1138@3764: 	foreach_draw_tile_seq(seq, sprites->seq) {
peter1138@3764: 		Point pt;
peter1138@3775: 		image = seq->image;
peter1138@3775: 		if (HASBIT(image, 30)) {
peter1138@3775: 			CLRBIT(image, 30);
peter1138@3775: 			image += rti->total_offset;
peter1138@3775: 		} else {
peter1138@3775: 			image += relocation;
peter1138@3775: 		}
peter1138@3764: 
peter1138@3764: 		if ((byte)seq->delta_z != 0x80) {
peter1138@3764: 			pt = RemapCoords(seq->delta_x, seq->delta_y, seq->delta_z);
peter1138@3764: 			DrawSprite((image & SPRITE_MASK) | colourmod, x + pt.x, y + pt.y);
peter1138@3764: 		}
peter1138@3764: 	}
peter1138@3764: 
peter1138@3764: 	return true;
peter1138@3764: }
peter1138@3764: 
tron@4206: 
tron@4206: static const StationSpec* GetStationSpec(TileIndex t)
tron@4206: {
tron@4206: 	const Station* st;
tron@4206: 	uint specindex;
tron@4206: 
tron@4206: 	if (!IsCustomStationSpecIndex(t)) return NULL;
tron@4206: 
tron@4206: 	st = GetStationByTile(t);
tron@4206: 	specindex = GetCustomStationSpecIndex(t);
tron@4206: 	return specindex < st->num_specs ? st->speclist[specindex].spec : NULL;
tron@4206: }
tron@4206: 
tron@4206: 
peter1138@3766: /* Check if a rail station tile is traversable.
peter1138@3766:  * XXX This could be cached (during build) in the map array to save on all the dereferencing */
peter1138@3766: bool IsStationTileBlocked(TileIndex tile)
peter1138@3766: {
tron@4206: 	const StationSpec* statspec = GetStationSpec(tile);
peter1138@3766: 
tron@4206: 	return statspec != NULL && HASBIT(statspec->blocked, GetStationGfx(tile));
peter1138@3766: }
glx@3789: 
glx@3789: /* Check if a rail station tile is electrifiable.
glx@3789:  * XXX This could be cached (during build) in the map array to save on all the dereferencing */
glx@3789: bool IsStationTileElectrifiable(TileIndex tile)
glx@3789: {
tron@4206: 	const StationSpec* statspec = GetStationSpec(tile);
glx@3789: 
tron@4206: 	return
tron@4206: 		statspec == NULL ||
tron@4206: 		HASBIT(statspec->pylons, GetStationGfx(tile)) ||
tron@4206: 		!HASBIT(statspec->wires, GetStationGfx(tile));
glx@3789: }