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Location: cpp/openttd-patchpack/source/src/newgrf_station.cpp - annotation
r16843:a8f72c659012
28.1 KiB
text/x-c
(svn r21587) -Codechange: Move simple callback functions into the switch.
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r15071:e236d80508bb r15071:e236d80508bb r15071:e236d80508bb | /* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file newgrf_station.cpp Functions for dealing with station classes and custom stations. */
#include "stdafx.h"
#include "debug.h"
#include "station_base.h"
#include "waypoint_base.h"
#include "roadstop_base.h"
#include "newgrf_cargo.h"
#include "newgrf_station.h"
#include "newgrf_spritegroup.h"
#include "newgrf_sound.h"
#include "newgrf_railtype.h"
#include "town.h"
#include "newgrf_town.h"
#include "company_func.h"
#include "tunnelbridge_map.h"
#include "newgrf.h"
#include "newgrf_animation_base.h"
#include "newgrf_class_func.h"
template <typename Tspec, typename Tid, Tid Tmax>
/* static */ void NewGRFClass<Tspec, Tid, Tmax>::InsertDefaults()
{
/* Set up initial data */
classes[0].global_id = 'DFLT';
classes[0].name = STR_STATION_CLASS_DFLT;
classes[0].count = 1;
classes[0].spec = MallocT<StationSpec*>(1);
classes[0].spec[0] = NULL;
classes[1].global_id = 'WAYP';
classes[1].name = STR_STATION_CLASS_WAYP;
classes[1].count = 1;
classes[1].spec = MallocT<StationSpec*>(1);
classes[1].spec[0] = NULL;
}
INSTANTIATE_NEWGRF_CLASS_METHODS(StationClass, StationSpec, StationClassID, STAT_CLASS_MAX)
static const uint MAX_SPECLIST = 255;
enum TriggerArea {
TA_TILE,
TA_PLATFORM,
TA_WHOLE,
};
struct ETileArea : TileArea {
ETileArea(const BaseStation *st, TileIndex tile, TriggerArea ta)
{
switch (ta) {
default: NOT_REACHED();
case TA_TILE:
this->tile = tile;
this->w = 1;
this->h = 1;
break;
case TA_PLATFORM: {
TileIndex start, end;
Axis axis = GetRailStationAxis(tile);
TileIndexDiff delta = TileOffsByDiagDir(AxisToDiagDir(axis));
for (end = tile; IsRailStationTile(end + delta) && IsCompatibleTrainStationTile(tile, end + delta); end += delta) { /* Nothing */ }
for (start = tile; IsRailStationTile(start - delta) && IsCompatibleTrainStationTile(tile, start - delta); start -= delta) { /* Nothing */ }
this->tile = start;
this->w = TileX(end) - TileX(start) + 1;
this->h = TileY(end) - TileY(start) + 1;
break;
}
case TA_WHOLE:
st->GetTileArea(this, Station::IsExpected(st) ? STATION_RAIL : STATION_WAYPOINT);
break;
}
}
};
/**
* Evaluate a tile's position within a station, and return the result in a bit-stuffed format.
* if not centered: .TNLcCpP, if centered: .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 centered, C/P start from the centre and c/p are not available.
* @return Platform information in bit-stuffed format.
*/
uint32 GetPlatformInfo(Axis axis, byte tile, int platforms, int length, int x, int y, bool centred)
{
uint32 retval = 0;
if (axis == AXIS_X) {
Swap(platforms, length);
Swap(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 \a tile, in the direction of \a delta.
* @param tile Start tile.
* @param delta Movement direction.
* @param check_type Stop when the custom station type changes.
* @param check_axis Stop when the station direction changes.
* @return Found end of the railway station.
*/
static TileIndex FindRailStationEnd(TileIndex tile, TileIndexDiff delta, bool check_type, bool check_axis)
{
byte orig_type = 0;
Axis orig_axis = AXIS_X;
StationID sid = GetStationIndex(tile);
if (check_type) orig_type = GetCustomStationSpecIndex(tile);
if (check_axis) orig_axis = GetRailStationAxis(tile);
while (true) {
TileIndex new_tile = TILE_ADD(tile, delta);
if (!IsTileType(new_tile, MP_STATION) || GetStationIndex(new_tile) != sid) break;
if (!HasStationRail(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;
tx -= sx; ex -= sx;
ty -= sy; ey -= sy;
return GetPlatformInfo(GetRailStationAxis(tile), GetStationGfx(tile), ex, ey, tx, ty, centred);
}
static uint32 GetRailContinuationInfo(TileIndex tile)
{
/* Tile offsets and exit dirs for X axis */
static const Direction x_dir[8] = { DIR_SW, DIR_NE, DIR_SE, DIR_NW, DIR_S, DIR_E, DIR_W, DIR_N };
static const 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 const Direction y_dir[8] = { DIR_SE, DIR_NW, DIR_SW, DIR_NE, DIR_S, DIR_W, DIR_E, DIR_N };
static const DiagDirection y_exits[8] = { DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_NW };
Axis axis = GetRailStationAxis(tile);
/* Choose appropriate lookup table to use */
const Direction *dir = axis == AXIS_X ? x_dir : y_dir;
const DiagDirection *diagdir = axis == AXIS_X ? x_exits : y_exits;
uint32 res = 0;
uint i;
for (i = 0; i < lengthof(x_dir); i++, dir++, diagdir++) {
TileIndex neighbour_tile = tile + TileOffsByDir(*dir);
TrackBits trackbits = TrackStatusToTrackBits(GetTileTrackStatus(neighbour_tile, TRANSPORT_RAIL, 0));
if (trackbits != TRACK_BIT_NONE) {
/* If there is any track on the tile, set the bit in the second byte */
SetBit(res, i + 8);
/* With tunnels and bridges the tile has tracks, but they are not necessarily connected
* with the next tile because the ramp is not going in the right direction. */
if (IsTileType(neighbour_tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(neighbour_tile) != *diagdir) {
continue;
}
/* If any track reaches our exit direction, set the bit in the lower byte */
if (trackbits & DiagdirReachesTracks(*diagdir)) SetBit(res, i);
}
}
return res;
}
/* Station Resolver Functions */
static uint32 StationGetRandomBits(const ResolverObject *object)
{
const BaseStation *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 BaseStation *st = object->u.station.st;
return st == NULL ? 0 : st->waiting_triggers;
}
static void StationSetTriggers(const ResolverObject *object, int triggers)
{
BaseStation *st = const_cast<BaseStation *>(object->u.station.st);
assert(st != NULL);
st->waiting_triggers = triggers;
}
/**
* Station variable cache
* This caches 'expensive' station variable lookups which iterate over
* several tiles that may be called multiple times per Resolve().
*/
static struct {
uint32 v40;
uint32 v41;
uint32 v45;
uint32 v46;
uint32 v47;
uint32 v49;
uint8 valid; ///< Bits indicating what variable is valid (for each bit, \c 0 is invalid, \c 1 is valid).
} _svc;
static uint32 StationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
const BaseStation *st = object->u.station.st;
TileIndex tile = object->u.station.tile;
if (object->scope == VSG_SCOPE_PARENT) {
/* Pass the request on to the town of the station */
const Town *t;
if (st != NULL) {
t = st->town;
} else if (tile != INVALID_TILE) {
t = ClosestTownFromTile(tile, UINT_MAX);
} else {
*available = false;
return UINT_MAX;
}
return TownGetVariable(variable, parameter, available, t);
}
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_company; // Station owner
case 0x44: return 2; // PBS status
case 0xFA: return Clamp(_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
}
*available = false;
return UINT_MAX;
}
switch (variable) {
/* Calculated station variables */
case 0x40:
if (!HasBit(_svc.valid, 0)) { _svc.v40 = GetPlatformInfoHelper(tile, false, false, false); SetBit(_svc.valid, 0); }
return _svc.v40;
case 0x41:
if (!HasBit(_svc.valid, 1)) { _svc.v41 = GetPlatformInfoHelper(tile, true, false, false); SetBit(_svc.valid, 1); }
return _svc.v41;
case 0x42: return GetTerrainType(tile) | (GetReverseRailTypeTranslation(GetRailType(tile), object->u.station.statspec->grf_prop.grffile) << 8);
case 0x43: return st->owner; // Station owner
case 0x44: return HasStationReservation(tile) ? 7 : 4; // PBS status
case 0x45:
if (!HasBit(_svc.valid, 2)) { _svc.v45 = GetRailContinuationInfo(tile); SetBit(_svc.valid, 2); }
return _svc.v45;
case 0x46:
if (!HasBit(_svc.valid, 3)) { _svc.v46 = GetPlatformInfoHelper(tile, false, false, true); SetBit(_svc.valid, 3); }
return _svc.v46;
case 0x47:
if (!HasBit(_svc.valid, 4)) { _svc.v47 = GetPlatformInfoHelper(tile, true, false, true); SetBit(_svc.valid, 4); }
return _svc.v47;
case 0x49:
if (!HasBit(_svc.valid, 5)) { _svc.v49 = GetPlatformInfoHelper(tile, false, true, false); SetBit(_svc.valid, 5); }
return _svc.v49;
case 0x4A: // Animation frame of tile
return GetAnimationFrame(tile);
/* Variables which use the parameter */
/* Variables 0x60 to 0x65 are handled separately below */
case 0x66: // Animation frame of nearby tile
if (parameter != 0) tile = GetNearbyTile(parameter, tile);
return st->TileBelongsToRailStation(tile) ? GetAnimationFrame(tile) : UINT_MAX;
case 0x67: { // Land info of nearby tile
Axis axis = GetRailStationAxis(tile);
if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
Slope tileh = GetTileSlope(tile, NULL);
bool swap = (axis == AXIS_Y && HasBit(tileh, CORNER_W) != HasBit(tileh, CORNER_E));
return GetNearbyTileInformation(tile) ^ (swap ? SLOPE_EW : 0);
}
case 0x68: { // Station info of nearby tiles
TileIndex nearby_tile = GetNearbyTile(parameter, tile);
if (!HasStationTileRail(nearby_tile)) return 0xFFFFFFFF;
uint32 grfid = st->speclist[GetCustomStationSpecIndex(tile)].grfid;
bool perpendicular = GetRailStationAxis(tile) != GetRailStationAxis(nearby_tile);
bool same_station = st->TileBelongsToRailStation(nearby_tile);
uint32 res = GB(GetStationGfx(nearby_tile), 1, 2) << 12 | !!perpendicular << 11 | !!same_station << 10;
if (IsCustomStationSpecIndex(nearby_tile)) {
const StationSpecList ssl = BaseStation::GetByTile(nearby_tile)->speclist[GetCustomStationSpecIndex(nearby_tile)];
res |= 1 << (ssl.grfid != grfid ? 9 : 8) | ssl.localidx;
}
return res;
}
/* General station variables */
case 0x82: return 50;
case 0x84: return st->string_id;
case 0x86: return 0;
case 0xF0: return st->facilities;
case 0xFA: return Clamp(st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
}
return st->GetNewGRFVariable(object, variable, parameter, available);
}
uint32 Station::GetNewGRFVariable(const ResolverObject *object, byte variable, byte parameter, bool *available) const
{
switch (variable) {
case 0x48: { // Accepted cargo types
CargoID cargo_type;
uint32 value = 0;
for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
if (HasBit(this->goods[cargo_type].acceptance_pickup, GoodsEntry::PICKUP)) SetBit(value, cargo_type);
}
return value;
}
case 0x8A: return this->had_vehicle_of_type;
case 0xF1: return (this->airport.tile != INVALID_TILE) ? this->airport.GetSpec()->ttd_airport_type : ATP_TTDP_LARGE;
case 0xF2: return (this->truck_stops != NULL) ? this->truck_stops->status : 0;
case 0xF3: return (this->bus_stops != NULL) ? this->bus_stops->status : 0;
case 0xF6: return this->airport.flags;
case 0xF7: return GB(this->airport.flags, 8, 8);
}
/* Handle cargo variables with parameter, 0x60 to 0x65 */
if (variable >= 0x60 && variable <= 0x65) {
CargoID c = GetCargoTranslation(parameter, object->u.station.statspec->grf_prop.grffile);
if (c == CT_INVALID) return 0;
const GoodsEntry *ge = &this->goods[c];
switch (variable) {
case 0x60: return min(ge->cargo.Count(), 4095);
case 0x61: return ge->days_since_pickup;
case 0x62: return ge->rating;
case 0x63: return ge->cargo.DaysInTransit();
case 0x64: return ge->last_speed | (ge->last_age << 8);
case 0x65: return GB(ge->acceptance_pickup, GoodsEntry::ACCEPTANCE, 1) << 3;
}
}
/* Handle cargo variables (deprecated) */
if (variable >= 0x8C && variable <= 0xEC) {
const GoodsEntry *g = &this->goods[GB(variable - 0x8C, 3, 4)];
switch (GB(variable - 0x8C, 0, 3)) {
case 0: return g->cargo.Count();
case 1: return GB(min(g->cargo.Count(), 4095), 0, 4) | (GB(g->acceptance_pickup, GoodsEntry::ACCEPTANCE, 1) << 7);
case 2: return g->days_since_pickup;
case 3: return g->rating;
case 4: return g->cargo.Source();
case 5: return g->cargo.DaysInTransit();
case 6: return g->last_speed;
case 7: return g->last_age;
}
}
DEBUG(grf, 1, "Unhandled station variable 0x%X", variable);
*available = false;
return UINT_MAX;
}
uint32 Waypoint::GetNewGRFVariable(const ResolverObject *object, byte variable, byte parameter, bool *available) const
{
switch (variable) {
case 0x48: return 0; // Accepted cargo types
case 0x8A: return HVOT_WAYPOINT;
case 0xF1: return 0; // airport type
case 0xF2: return 0; // truck stop status
case 0xF3: return 0; // bus stop status
case 0xF6: return 0; // airport flags
case 0xF7: return 0; // airport flags cont.
}
/* Handle cargo variables with parameter, 0x60 to 0x65 */
if (variable >= 0x60 && variable <= 0x65) {
return 0;
}
/* Handle cargo variables (deprecated) */
if (variable >= 0x8C && variable <= 0xEC) {
switch (GB(variable - 0x8C, 0, 3)) {
case 3: return INITIAL_STATION_RATING;
case 4: return INVALID_STATION;
default: return 0;
}
}
DEBUG(grf, 1, "Unhandled station variable 0x%X", variable);
*available = false;
return UINT_MAX;
}
static const SpriteGroup *StationResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
{
const BaseStation *bst = 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 (bst == NULL || statspec->cls_id == STAT_CLASS_WAYP) {
return group->loading[0];
}
const Station *st = Station::From(bst);
switch (cargo_type) {
case CT_INVALID:
case CT_DEFAULT_NA:
case CT_PURCHASE:
cargo = 0;
break;
case CT_DEFAULT:
for (cargo_type = 0; cargo_type < NUM_CARGO; cargo_type++) {
cargo += st->goods[cargo_type].cargo.Count();
}
break;
default:
cargo = st->goods[cargo_type].cargo.Count();
break;
}
if (HasBit(statspec->flags, SSF_DIV_BY_STATION_SIZE)) cargo /= (st->train_station.w + st->train_station.h);
cargo = min(0xfff, cargo);
if (cargo > statspec->cargo_threshold) {
if (group->num_loading > 0) {
set = ((cargo - statspec->cargo_threshold) * group->num_loading) / (4096 - statspec->cargo_threshold);
return group->loading[set];
}
} else {
if (group->num_loaded > 0) {
set = (cargo * group->num_loaded) / (statspec->cargo_threshold + 1);
return group->loaded[set];
}
}
return group->loading[0];
}
static void NewStationResolver(ResolverObject *res, const StationSpec *statspec, const BaseStation *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 = CBID_NO_CALLBACK;
res->callback_param1 = 0;
res->callback_param2 = 0;
res->last_value = 0;
res->trigger = 0;
res->reseed = 0;
res->count = 0;
res->grffile = (statspec != NULL ? statspec->grf_prop.grffile : NULL);
}
static const SpriteGroup *ResolveStation(ResolverObject *object)
{
const SpriteGroup *group;
CargoID ctype = CT_DEFAULT_NA;
if (object->u.station.st == NULL) {
/* No station, so we are in a purchase list */
ctype = CT_PURCHASE;
} else if (Station::IsExpected(object->u.station.st)) {
const Station *st = Station::From(object->u.station.st);
/* Pick the first cargo that we have waiting */
const CargoSpec *cs;
FOR_ALL_CARGOSPECS(cs) {
if (object->u.station.statspec->grf_prop.spritegroup[cs->Index()] != NULL &&
!st->goods[cs->Index()].cargo.Empty()) {
ctype = cs->Index();
break;
}
}
}
group = object->u.station.statspec->grf_prop.spritegroup[ctype];
if (group == NULL) {
ctype = CT_DEFAULT;
group = object->u.station.statspec->grf_prop.spritegroup[ctype];
}
if (group == NULL) return NULL;
/* Remember the cargo type we've picked */
object->u.station.cargo_type = ctype;
/* Invalidate all cached vars */
_svc.valid = 0;
return SpriteGroup::Resolve(group, object);
}
SpriteID GetCustomStationRelocation(const StationSpec *statspec, const BaseStation *st, TileIndex tile)
{
const SpriteGroup *group;
ResolverObject object;
NewStationResolver(&object, statspec, st, tile);
group = ResolveStation(&object);
if (group == NULL || group->type != SGT_RESULT) return 0;
return group->GetResult() - 0x42D;
}
SpriteID GetCustomStationGroundRelocation(const StationSpec *statspec, const BaseStation *st, TileIndex tile)
{
const SpriteGroup *group;
ResolverObject object;
NewStationResolver(&object, statspec, st, tile);
if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
object.callback_param1 = 1; // Indicate we are resolving the ground sprite
}
group = ResolveStation(&object);
if (group == NULL || group->type != SGT_RESULT) return 0;
return group->GetResult() - 0x42D;
}
SpriteID GetCustomStationFoundationRelocation(const StationSpec *statspec, const BaseStation *st, TileIndex tile)
{
const SpriteGroup *group;
ResolverObject object;
NewStationResolver(&object, statspec, st, tile);
object.callback_param1 = 2; // Indicate we are resolving the foundation sprites
group = ResolveStation(&object);
if (group == NULL || group->type != SGT_RESULT) return 0;
return group->GetResult() + GetRegister(0x100);
}
uint16 GetStationCallback(CallbackID callback, uint32 param1, uint32 param2, const StationSpec *statspec, const BaseStation *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(&object);
if (group == NULL) return CALLBACK_FAILED;
return group->GetCallbackResult();
}
/**
* Allocate a StationSpec to a Station. This is called once per build operation.
* @param statspec 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, BaseStation *st, bool exec)
{
uint i;
if (statspec == NULL || st == NULL) return 0;
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) {
/* As final effort when the spec list is already full...
* try to find the same spec and return that one. This might
* result in slighty "wrong" (as per specs) looking stations,
* but it's fairly unlikely that one reaches the limit anyways.
*/
for (i = 1; i < st->num_specs && i < MAX_SPECLIST; i++) {
if (st->speclist[i].spec == statspec) return i;
}
return -1;
}
if (exec) {
if (i >= st->num_specs) {
st->num_specs = i + 1;
st->speclist = ReallocT(st->speclist, st->num_specs);
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->grf_prop.grffile->grfid;
st->speclist[i].localidx = statspec->grf_prop.local_id;
}
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(BaseStation *st, byte specindex)
{
/* specindex of 0 (default) is never freeable */
if (specindex == 0) return;
ETileArea area = ETileArea(st, INVALID_TILE, TA_WHOLE);
/* Check all tiles over the station to check if the specindex is still in use */
TILE_AREA_LOOP(tile, area) {
if (st->TileBelongsToRailStation(tile) && GetCustomStationSpecIndex(tile) == specindex) {
return;
}
}
/* 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 = ReallocT(st->speclist, st->num_specs);
} else {
free(st->speclist);
st->num_specs = 0;
st->speclist = NULL;
st->cached_anim_triggers = 0;
return;
}
}
StationUpdateAnimTriggers(st);
}
/**
* Draw representation of a station tile for GUI purposes.
* @param x Position x of image.
* @param y Position y of image.
* @param axis Axis.
* @param railtype Rail type.
* @param sclass, station Type of station.
* @param station station ID
* @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 RailtypeInfo *rti = GetRailTypeInfo(railtype);
PaletteID palette = COMPANY_SPRITE_COLOUR(_local_company);
uint tile = 2;
statspec = StationClass::Get(sclass, station);
if (statspec == NULL) return false;
uint relocation = GetCustomStationRelocation(statspec, NULL, INVALID_TILE);
if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_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(STATION_RAIL, tile + axis);
} else {
sprites = &statspec->renderdata[(tile < statspec->tiles) ? tile + axis : (uint)axis];
}
SpriteID image = sprites->ground.sprite;
PaletteID pal = sprites->ground.pal;
if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
image += GetCustomStationGroundRelocation(statspec, NULL, INVALID_TILE);
image += rti->custom_ground_offset;
} else {
image += rti->total_offset;
}
DrawSprite(image, GroundSpritePaletteTransform(image, pal, palette), x, y);
DrawRailTileSeqInGUI(x, y, sprites, rti->total_offset, relocation, palette);
return true;
}
const StationSpec *GetStationSpec(TileIndex t)
{
if (!IsCustomStationSpecIndex(t)) return NULL;
const BaseStation *st = BaseStation::GetByTile(t);
uint specindex = GetCustomStationSpecIndex(t);
return specindex < st->num_specs ? st->speclist[specindex].spec : NULL;
}
/**
* Check whether a rail station tile is NOT traversable.
* @param tile %Tile to test.
* @return Station tile is blocked.
* @note 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 can be electrified.
* @param tile %Tile to test.
* @return Tile can be electrified.
* @note 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));
}
/** Helper class for animation control. */
struct StationAnimationBase : public AnimationBase<StationAnimationBase, StationSpec, BaseStation, GetStationCallback> {
static const CallbackID cb_animation_speed = CBID_STATION_ANIMATION_SPEED;
static const CallbackID cb_animation_next_frame = CBID_STATION_ANIM_NEXT_FRAME;
static const StationCallbackMask cbm_animation_speed = CBM_STATION_ANIMATION_SPEED;
static const StationCallbackMask cbm_animation_next_frame = CBM_STATION_ANIMATION_NEXT_FRAME;
};
void AnimateStationTile(TileIndex tile)
{
const StationSpec *ss = GetStationSpec(tile);
if (ss == NULL) return;
StationAnimationBase::AnimateTile(ss, BaseStation::GetByTile(tile), tile, HasBit(ss->flags, SSF_CB141_RANDOM_BITS));
}
void TriggerStationAnimation(const BaseStation *st, TileIndex tile, StationAnimationTrigger trigger, CargoID cargo_type)
{
/* List of coverage areas for each animation trigger */
static const TriggerArea tas[] = {
TA_TILE, TA_WHOLE, TA_WHOLE, TA_PLATFORM, TA_PLATFORM, TA_PLATFORM, TA_WHOLE
};
/* Get Station if it wasn't supplied */
if (st == NULL) st = BaseStation::GetByTile(tile);
/* Check the cached animation trigger bitmask to see if we need
* to bother with any further processing. */
if (!HasBit(st->cached_anim_triggers, trigger)) return;
uint16 random_bits = Random();
ETileArea area = ETileArea(st, tile, tas[trigger]);
/* Check all tiles over the station to check if the specindex is still in use */
TILE_AREA_LOOP(tile, area) {
if (st->TileBelongsToRailStation(tile)) {
const StationSpec *ss = GetStationSpec(tile);
if (ss != NULL && HasBit(ss->animation.triggers, trigger)) {
CargoID cargo;
if (cargo_type == CT_INVALID) {
cargo = CT_INVALID;
} else {
cargo = GetReverseCargoTranslation(cargo_type, ss->grf_prop.grffile);
}
StationAnimationBase::ChangeAnimationFrame(CBID_STATION_ANIM_START_STOP, ss, st, tile, (random_bits << 16) | Random(), (uint8)trigger | (cargo << 8));
}
}
}
}
/**
* Update the cached animation trigger bitmask for a station.
* @param st Station to update.
*/
void StationUpdateAnimTriggers(BaseStation *st)
{
st->cached_anim_triggers = 0;
/* Combine animation trigger bitmask for all station specs
* of this station. */
for (uint i = 0; i < st->num_specs; i++) {
const StationSpec *ss = st->speclist[i].spec;
if (ss != NULL) st->cached_anim_triggers |= ss->animation.triggers;
}
}
/**
* Resolve a station's spec and such so we can get a variable.
* @param ro The resolver object to fill.
* @param index The station to get the data from.
*/
void GetStationResolver(ResolverObject *ro, uint index)
{
NewStationResolver(ro, GetStationSpec(index), Station::GetByTile(index), index);
}
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