diff options
Diffstat (limited to 'src/newgrf_station.cpp')
| -rw-r--r-- | src/newgrf_station.cpp | 766 |
1 files changed, 766 insertions, 0 deletions
diff --git a/src/newgrf_station.cpp b/src/newgrf_station.cpp new file mode 100644 index 000000000..f36769a41 --- /dev/null +++ b/src/newgrf_station.cpp @@ -0,0 +1,766 @@ +/* $Id$ */ + +/** @file newgrf_station.c Functions for dealing with station classes and custom stations. */ + +#include "stdafx.h" +#include "openttd.h" +#include "variables.h" +#include "functions.h" +#include "debug.h" +#include "sprite.h" +#include "table/sprites.h" +#include "table/strings.h" +#include "station.h" +#include "station_map.h" +#include "newgrf.h" +#include "newgrf_callbacks.h" +#include "newgrf_station.h" +#include "newgrf_spritegroup.h" +#include "date.h" + +static StationClass station_classes[STAT_CLASS_MAX]; + +enum { + MAX_SPECLIST = 255, +}; + +/** + * Reset station classes to their default state. + * This includes initialising the Default and Waypoint classes with an empty + * entry, for standard stations and waypoints. + */ +void ResetStationClasses(void) +{ + StationClassID i; + for (i = 0; i < STAT_CLASS_MAX; i++) { + station_classes[i].id = 0; + station_classes[i].name = STR_EMPTY; + station_classes[i].stations = 0; + + free(station_classes[i].spec); + station_classes[i].spec = NULL; + } + + // Set up initial data + station_classes[0].id = 'DFLT'; + station_classes[0].name = STR_STAT_CLASS_DFLT; + station_classes[0].stations = 1; + station_classes[0].spec = malloc(sizeof(*station_classes[0].spec)); + station_classes[0].spec[0] = NULL; + + station_classes[1].id = 'WAYP'; + station_classes[1].name = STR_STAT_CLASS_WAYP; + station_classes[1].stations = 1; + station_classes[1].spec = malloc(sizeof(*station_classes[1].spec)); + station_classes[1].spec[0] = NULL; +} + +/** + * Allocate a station class for the given class id. + * @param classid A 32 bit value identifying the class. + * @return Index into station_classes of allocated class. + */ +StationClassID AllocateStationClass(uint32 class) +{ + StationClassID i; + + for (i = 0; i < STAT_CLASS_MAX; i++) { + if (station_classes[i].id == class) { + // ClassID is already allocated, so reuse it. + return i; + } else if (station_classes[i].id == 0) { + // This class is empty, so allocate it to the ClassID. + station_classes[i].id = class; + return i; + } + } + + grfmsg(2, "StationClassAllocate: already allocated %d classes, using default", STAT_CLASS_MAX); + return STAT_CLASS_DFLT; +} + +/** Set the name of a custom station class */ +void SetStationClassName(StationClassID sclass, StringID name) +{ + assert(sclass < STAT_CLASS_MAX); + station_classes[sclass].name = name; +} + +/** Retrieve the name of a custom station class */ +StringID GetStationClassName(StationClassID sclass) +{ + assert(sclass < STAT_CLASS_MAX); + return station_classes[sclass].name; +} + +/** Build a list of station class name StringIDs to use in a dropdown list + * @return Pointer to a (static) array of StringIDs + */ +StringID *BuildStationClassDropdown(void) +{ + /* Allow room for all station classes, plus a terminator entry */ + static StringID names[STAT_CLASS_MAX + 1]; + uint i; + + /* Add each name */ + for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++) { + names[i] = station_classes[i].name; + } + /* Terminate the list */ + names[i] = INVALID_STRING_ID; + + return names; +} + +/** + * Get the number of station classes in use. + * @return Number of station classes. + */ +uint GetNumStationClasses(void) +{ + uint i; + for (i = 0; i < STAT_CLASS_MAX && station_classes[i].id != 0; i++); + return i; +} + +/** + * Return the number of stations for the given station class. + * @param sclass Index of the station class. + * @return Number of stations in the class. + */ +uint GetNumCustomStations(StationClassID sclass) +{ + assert(sclass < STAT_CLASS_MAX); + return station_classes[sclass].stations; +} + +/** + * Tie a station spec to its station class. + * @param spec The station spec. + */ +void SetCustomStationSpec(StationSpec *statspec) +{ + StationClass *station_class; + int i; + + /* If the station has already been allocated, don't reallocate it. */ + if (statspec->allocated) return; + + assert(statspec->sclass < STAT_CLASS_MAX); + station_class = &station_classes[statspec->sclass]; + + i = station_class->stations++; + station_class->spec = realloc(station_class->spec, station_class->stations * sizeof(*station_class->spec)); + + station_class->spec[i] = statspec; + statspec->allocated = true; +} + +/** + * Retrieve a station spec from a class. + * @param sclass Index of the station class. + * @param station The station index with the class. + * @return The station spec. + */ +const StationSpec *GetCustomStationSpec(StationClassID sclass, uint station) +{ + assert(sclass < STAT_CLASS_MAX); + if (station < station_classes[sclass].stations) + return station_classes[sclass].spec[station]; + + // If the custom station isn't defined any more, then the GRF file + // probably was not loaded. + return NULL; +} + + +const StationSpec *GetCustomStationSpecByGrf(uint32 grfid, byte localidx) +{ + StationClassID i; + uint j; + + for (i = STAT_CLASS_DFLT; i < STAT_CLASS_MAX; i++) { + for (j = 0; j < station_classes[i].stations; j++) { + const StationSpec *statspec = station_classes[i].spec[j]; + if (statspec == NULL) continue; + if (statspec->grfid == grfid && statspec->localidx == localidx) return statspec; + } + } + + return NULL; +} + + +/* Evaluate a tile's position within a station, and return the result a bitstuffed format. + * if not centred: .TNLcCpP, if centred: .TNL..CP + * T = Tile layout number (GetStationGfx), N = Number of platforms, L = Length of platforms + * C = Current platform number from start, c = from end + * P = Position along platform from start, p = from end + * if centred, C/P start from the centre and c/p are not available. + */ +uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred) +{ + uint32 retval = 0; + + if (axis == AXIS_X) { + intswap(platforms, length); + intswap(x, y); + } + + /* Limit our sizes to 4 bits */ + platforms = min(15, platforms); + length = min(15, length); + x = min(15, x); + y = min(15, y); + if (centred) { + x -= platforms / 2; + y -= length / 2; + SB(retval, 0, 4, y & 0xF); + SB(retval, 4, 4, x & 0xF); + } else { + SB(retval, 0, 4, y); + SB(retval, 4, 4, length - y - 1); + SB(retval, 8, 4, x); + SB(retval, 12, 4, platforms - x - 1); + } + SB(retval, 16, 4, length); + SB(retval, 20, 4, platforms); + SB(retval, 24, 4, tile); + + return retval; +} + + +/* Find the end of a railway station, from the tile, in the direction of delta. + * If check_type is set, we stop if the custom station type changes. + * If check_axis is set, we stop if the station direction changes. + */ +static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis) +{ + bool waypoint; + byte orig_type = 0; + Axis orig_axis = AXIS_X; + + waypoint = IsTileType(tile, MP_RAILWAY); + + if (waypoint) { + if (check_axis) orig_axis = GetWaypointAxis(tile); + } else { + if (check_type) orig_type = GetCustomStationSpecIndex(tile); + if (check_axis) orig_axis = GetRailStationAxis(tile); + } + + while (true) { + TileIndex new_tile = TILE_ADD(tile, delta); + + if (waypoint) { + if (!IsTileType(new_tile, MP_RAILWAY)) break; + if (!IsRailWaypoint(new_tile)) break; + if (check_axis && GetWaypointAxis(new_tile) != orig_axis) break; + } else { + if (!IsRailwayStationTile(new_tile)) break; + if (check_type && GetCustomStationSpecIndex(new_tile) != orig_type) break; + if (check_axis && GetRailStationAxis(new_tile) != orig_axis) break; + } + + tile = new_tile; + } + return tile; +} + + +static uint32 GetPlatformInfoHelper(TileIndex tile, bool check_type, bool check_axis, bool centred) +{ + int tx = TileX(tile); + int ty = TileY(tile); + int sx = TileX(FindRailStationEnd(tile, TileDiffXY(-1, 0), check_type, check_axis)); + int sy = TileY(FindRailStationEnd(tile, TileDiffXY( 0, -1), check_type, check_axis)); + int ex = TileX(FindRailStationEnd(tile, TileDiffXY( 1, 0), check_type, check_axis)) + 1; + int ey = TileY(FindRailStationEnd(tile, TileDiffXY( 0, 1), check_type, check_axis)) + 1; + Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile); + + tx -= sx; ex -= sx; + ty -= sy; ey -= sy; + + return GetPlatformInfo(axis, IsTileType(tile, MP_RAILWAY) ? 2 : GetStationGfx(tile), ex, ey, tx, ty, centred); +} + + +static uint32 GetRailContinuationInfo(TileIndex tile) +{ + /* Tile offsets and exit dirs for X axis */ + static Direction x_dir[8] = { DIR_SW, DIR_NE, DIR_SE, DIR_NW, DIR_S, DIR_E, DIR_W, DIR_N }; + static DiagDirection x_exits[8] = { DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SW, DIAGDIR_NE }; + + /* Tile offsets and exit dirs for Y axis */ + static Direction y_dir[8] = { DIR_SE, DIR_NW, DIR_SW, DIR_NE, DIR_S, DIR_W, DIR_E, DIR_N }; + static DiagDirection y_exits[8] = { DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_NW }; + + Axis axis = IsTileType(tile, MP_RAILWAY) ? GetWaypointAxis(tile) : GetRailStationAxis(tile); + + /* Choose appropriate lookup table to use */ + Direction *dir = axis == AXIS_X ? x_dir : y_dir; + DiagDirection *diagdir = axis == AXIS_X ? x_exits : y_exits; + + uint32 res = 0; + uint i; + + for (i = 0; i < lengthof(x_dir); i++, dir++, diagdir++) { + uint32 ts = GetTileTrackStatus(tile + TileOffsByDir(*dir), TRANSPORT_RAIL); + if (ts != 0) { + /* If there is any track on the tile, set the bit in the second byte */ + SETBIT(res, i + 8); + + /* If any track reaches our exit direction, set the bit in the lower byte */ + if (ts & DiagdirReachesTracks(*diagdir)) SETBIT(res, i); + } + } + + return res; +} + + +/* Station Resolver Functions */ +static uint32 StationGetRandomBits(const ResolverObject *object) +{ + const Station *st = object->u.station.st; + const TileIndex tile = object->u.station.tile; + return (st == NULL ? 0 : st->random_bits) | (tile == INVALID_TILE ? 0 : GetStationTileRandomBits(tile) << 16); +} + + +static uint32 StationGetTriggers(const ResolverObject *object) +{ + const Station *st = object->u.station.st; + return st == NULL ? 0 : st->waiting_triggers; +} + + +static void StationSetTriggers(const ResolverObject *object, int triggers) +{ + Station *st = (Station*)object->u.station.st; + assert(st != NULL); + st->waiting_triggers = triggers; +} + + +static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available) +{ + const Station *st = object->u.station.st; + TileIndex tile = object->u.station.tile; + + if (st == NULL) { + /* Station does not exist, so we're in a purchase list */ + switch (variable) { + case 0x40: + case 0x41: + case 0x46: + case 0x47: + case 0x49: return 0x2110000; /* Platforms, tracks & position */ + case 0x42: return 0; /* Rail type (XXX Get current type from GUI?) */ + case 0x43: return _current_player; /* Station owner */ + case 0x44: return 2; /* PBS status */ + case 0xFA: return max(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0); /* Build date */ + } + + *available = false; + return -1; + } + + switch (variable) { + /* Calculated station variables */ + case 0x40: return GetPlatformInfoHelper(tile, false, false, false); + case 0x41: return GetPlatformInfoHelper(tile, true, false, false); + case 0x42: /* Terrain and rail type */ + return ((_opt.landscape == LT_HILLY && GetTileZ(tile) > _opt.snow_line) ? 4 : 0) | + (GetRailType(tile) << 8); + case 0x43: return st->owner; /* Station owner */ + case 0x44: return 2; /* PBS status */ + case 0x45: return GetRailContinuationInfo(tile); + case 0x46: return GetPlatformInfoHelper(tile, false, false, true); + case 0x47: return GetPlatformInfoHelper(tile, true, false, true); + case 0x48: { /* Accepted cargo types */ + CargoID cargo_type; + uint32 value = 0; + + for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) { + if (HASBIT(st->goods[cargo_type].waiting_acceptance, 15)) SETBIT(value, cargo_type); + } + return value; + } + case 0x49: return GetPlatformInfoHelper(tile, false, true, false); + + /* Variables which use the parameter */ + case 0x60: return GB(st->goods[parameter].waiting_acceptance, 0, 12); + case 0x61: return st->goods[parameter].days_since_pickup; + case 0x62: return st->goods[parameter].rating; + case 0x63: return st->goods[parameter].enroute_time; + case 0x64: return st->goods[parameter].last_speed | (st->goods[parameter].last_age << 8); + case 0x65: return GB(st->goods[parameter].waiting_acceptance, 12, 4); + + /* General station properties */ + case 0x82: return 50; + case 0x84: return st->string_id; + case 0x86: return 0; + case 0x8A: return st->had_vehicle_of_type; + case 0xF0: return st->facilities; + case 0xF1: return st->airport_type; + case 0xF2: return st->truck_stops->status; + case 0xF3: return st->bus_stops->status; + case 0xF6: return st->airport_flags; + case 0xF7: return GB(st->airport_flags, 8, 8); + case 0xFA: return max(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0); + } + + /* Handle cargo variables (deprecated) */ + if (variable >= 0x8C && variable <= 0xEC) { + const GoodsEntry *g = &st->goods[GB(variable - 0x8C, 3, 4)]; + switch (GB(variable - 0x8C, 0, 3)) { + case 0: return g->waiting_acceptance; + case 1: return GB(g->waiting_acceptance, 8, 8); + case 2: return g->days_since_pickup; + case 3: return g->rating; + case 4: return g->enroute_from; + case 5: return g->enroute_time; + case 6: return g->last_speed; + case 7: return g->last_age; + } + } + + DEBUG(grf, 1, "Unhandled station property 0x%X", variable); + + *available = false; + return -1; +} + + +static const SpriteGroup *StationResolveReal(const ResolverObject *object, const SpriteGroup *group) +{ + const Station *st = object->u.station.st; + const StationSpec *statspec = object->u.station.statspec; + uint set; + + uint cargo = 0; + CargoID cargo_type = object->u.station.cargo_type; + + if (st == NULL || statspec->sclass == STAT_CLASS_WAYP) { + return group->g.real.loading[0]; + } + + switch (cargo_type) { + case GC_INVALID: + case GC_DEFAULT_NA: + case GC_PURCHASE: + cargo = 0; + break; + + case GC_DEFAULT: + for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) { + cargo += GB(st->goods[cargo_type].waiting_acceptance, 0, 12); + } + break; + + default: + cargo = GB(st->goods[_local_cargo_id_ctype[cargo_type]].waiting_acceptance, 0, 12); + break; + } + + if (HASBIT(statspec->flags, 1)) cargo /= (st->trainst_w + st->trainst_h); + cargo = min(0xfff, cargo); + + if (cargo > statspec->cargo_threshold) { + if (group->g.real.num_loading > 0) { + set = ((cargo - statspec->cargo_threshold) * group->g.real.num_loading) / (4096 - statspec->cargo_threshold); + return group->g.real.loading[set]; + } + } else { + if (group->g.real.num_loaded > 0) { + set = (cargo * group->g.real.num_loaded) / (statspec->cargo_threshold + 1); + return group->g.real.loaded[set]; + } + } + + return group->g.real.loading[0]; +} + + +static void NewStationResolver(ResolverObject *res, const StationSpec *statspec, const Station *st, TileIndex tile) +{ + res->GetRandomBits = StationGetRandomBits; + res->GetTriggers = StationGetTriggers; + res->SetTriggers = StationSetTriggers; + res->GetVariable = StationGetVariable; + res->ResolveReal = StationResolveReal; + + res->u.station.st = st; + res->u.station.statspec = statspec; + res->u.station.tile = tile; + + res->callback = 0; + res->callback_param1 = 0; + res->callback_param2 = 0; + res->last_value = 0; + res->trigger = 0; + res->reseed = 0; +} + +static const SpriteGroup *ResolveStation(const StationSpec *statspec, const Station *st, ResolverObject *object) +{ + const SpriteGroup *group; + CargoID ctype = GC_DEFAULT_NA; + + if (st == NULL) { + /* No station, so we are in a purchase list */ + ctype = GC_PURCHASE; + } else { + CargoID cargo; + + /* Pick the first cargo that we have waiting */ + for (cargo = 0; cargo < NUM_GLOBAL_CID; cargo++) { + CargoID lcid = _local_cargo_id_ctype[cargo]; + if (lcid != CT_INVALID && statspec->spritegroup[cargo] != NULL && GB(st->goods[lcid].waiting_acceptance, 0, 12) != 0) { + ctype = cargo; + break; + } + } + } + + group = statspec->spritegroup[ctype]; + if (group == NULL) { + ctype = GC_DEFAULT; + group = statspec->spritegroup[ctype]; + } + + if (group == NULL) return NULL; + + /* Remember the cargo type we've picked */ + object->u.station.cargo_type = ctype; + + return Resolve(group, object); +} + +SpriteID GetCustomStationRelocation(const StationSpec *statspec, const Station *st, TileIndex tile) +{ + const SpriteGroup *group; + ResolverObject object; + + NewStationResolver(&object, statspec, st, tile); + + group = ResolveStation(statspec, st, &object); + if (group == NULL || group->type != SGT_RESULT) return 0; + return group->g.result.sprite - 0x42D; +} + + +SpriteID GetCustomStationGroundRelocation(const StationSpec *statspec, const Station *st, TileIndex tile) +{ + const SpriteGroup *group; + ResolverObject object; + + NewStationResolver(&object, statspec, st, tile); + object.callback_param1 = 1; /* Indicate we are resolving the ground sprite */ + + group = ResolveStation(statspec, st, &object); + if (group == NULL || group->type != SGT_RESULT) return 0; + return group->g.result.sprite - 0x42D; +} + + +uint16 GetStationCallback(uint16 callback, uint32 param1, uint32 param2, const StationSpec *statspec, const Station *st, TileIndex tile) +{ + const SpriteGroup *group; + ResolverObject object; + + NewStationResolver(&object, statspec, st, tile); + + object.callback = callback; + object.callback_param1 = param1; + object.callback_param2 = param2; + + group = ResolveStation(statspec, st, &object); + if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED; + return group->g.callback.result; +} + + +/** + * Allocate a StationSpec to a Station. This is called once per build operation. + * @param spec StationSpec to allocate. + * @param st Station to allocate it to. + * @param exec Whether to actually allocate the spec. + * @return Index within the Station's spec list, or -1 if the allocation failed. + */ +int AllocateSpecToStation(const StationSpec *statspec, Station *st, bool exec) +{ + uint i; + + if (statspec == NULL) return 0; + + /* Check if this spec has already been allocated */ + for (i = 1; i < st->num_specs && i < MAX_SPECLIST; i++) { + if (st->speclist[i].spec == statspec) return i; + } + + for (i = 1; i < st->num_specs && i < MAX_SPECLIST; i++) { + if (st->speclist[i].spec == NULL && st->speclist[i].grfid == 0) break; + } + + if (i == MAX_SPECLIST) return -1; + + if (exec) { + if (i >= st->num_specs) { + st->num_specs = i + 1; + st->speclist = realloc(st->speclist, st->num_specs * sizeof(*st->speclist)); + + if (st->num_specs == 2) { + /* Initial allocation */ + st->speclist[0].spec = NULL; + st->speclist[0].grfid = 0; + st->speclist[0].localidx = 0; + } + } + + st->speclist[i].spec = statspec; + st->speclist[i].grfid = statspec->grfid; + st->speclist[i].localidx = statspec->localidx; + } + + return i; +} + + +/** Deallocate a StationSpec from a Station. Called when removing a single station tile. + * @param st Station to work with. + * @param specindex Index of the custom station within the Station's spec list. + * @return Indicates whether the StationSpec was deallocated. + */ +void DeallocateSpecFromStation(Station* st, byte specindex) +{ + /* specindex of 0 (default) is never freeable */ + if (specindex == 0) return; + + /* Check all tiles over the station to check if the specindex is still in use */ + BEGIN_TILE_LOOP(tile, st->trainst_w, st->trainst_h, st->train_tile) { + if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st->index && IsRailwayStation(tile) && GetCustomStationSpecIndex(tile) == specindex) { + return; + } + } END_TILE_LOOP(tile, st->trainst_w, st->trainst_h, st->train_tile) + + /* This specindex is no longer in use, so deallocate it */ + st->speclist[specindex].spec = NULL; + st->speclist[specindex].grfid = 0; + st->speclist[specindex].localidx = 0; + + /* If this was the highest spec index, reallocate */ + if (specindex == st->num_specs - 1) { + for (; st->speclist[st->num_specs - 1].grfid == 0 && st->num_specs > 1; st->num_specs--); + + if (st->num_specs > 1) { + st->speclist = realloc(st->speclist, st->num_specs * sizeof(*st->speclist)); + } else { + free(st->speclist); + st->num_specs = 0; + st->speclist = NULL; + } + } +} + +/** Draw representation of a station tile for GUI purposes. + * @param x, y Position of image. + * @param dir Direction. + * @param railtype Rail type. + * @param sclass, station Type of station. + * @return True if the tile was drawn (allows for fallback to default graphic) + */ +bool DrawStationTile(int x, int y, RailType railtype, Axis axis, StationClassID sclass, uint station) +{ + const StationSpec *statspec; + const DrawTileSprites *sprites; + const DrawTileSeqStruct *seq; + const RailtypeInfo *rti = GetRailTypeInfo(railtype); + SpriteID relocation; + PalSpriteID image; + PalSpriteID colourmod = SPRITE_PALETTE(PLAYER_SPRITE_COLOR(_local_player)); + uint tile = 2; + + statspec = GetCustomStationSpec(sclass, station); + if (statspec == NULL) return false; + + relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE); + + if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) { + uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0x2110000, 0, statspec, NULL, INVALID_TILE); + if (callback != CALLBACK_FAILED) tile = callback; + } + + if (statspec->renderdata == NULL) { + sprites = GetStationTileLayout(tile + axis); + } else { + sprites = &statspec->renderdata[(tile < statspec->tiles) ? tile + axis : axis]; + } + + image = sprites->ground_sprite; + if (HASBIT(image, 31)) { + CLRBIT(image, 31); + image += GetCustomStationGroundRelocation(statspec, NULL, INVALID_TILE); + image += rti->custom_ground_offset; + } else { + image += rti->total_offset; + } + + if (image & PALETTE_MODIFIER_COLOR) image &= SPRITE_MASK; + DrawSprite(image, x, y); + + foreach_draw_tile_seq(seq, sprites->seq) { + Point pt; + image = seq->image; + if (HASBIT(image, 30)) { + CLRBIT(image, 30); + image += rti->total_offset; + } else { + image += relocation; + } + + if ((byte)seq->delta_z != 0x80) { + pt = RemapCoords(seq->delta_x, seq->delta_y, seq->delta_z); + DrawSprite((image & SPRITE_MASK) | colourmod, x + pt.x, y + pt.y); + } + } + + return true; +} + + +static const StationSpec* GetStationSpec(TileIndex t) +{ + const Station* st; + uint specindex; + + if (!IsCustomStationSpecIndex(t)) return NULL; + + st = GetStationByTile(t); + specindex = GetCustomStationSpecIndex(t); + return specindex < st->num_specs ? st->speclist[specindex].spec : NULL; +} + + +/* Check if a rail station tile is traversable. + * XXX This could be cached (during build) in the map array to save on all the dereferencing */ +bool IsStationTileBlocked(TileIndex tile) +{ + const StationSpec* statspec = GetStationSpec(tile); + + return statspec != NULL && HASBIT(statspec->blocked, GetStationGfx(tile)); +} + +/* Check if a rail station tile is electrifiable. + * XXX This could be cached (during build) in the map array to save on all the dereferencing */ +bool IsStationTileElectrifiable(TileIndex tile) +{ + const StationSpec* statspec = GetStationSpec(tile); + + return + statspec == NULL || + HASBIT(statspec->pylons, GetStationGfx(tile)) || + !HASBIT(statspec->wires, GetStationGfx(tile)); +} |