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@ r27976:645fcc9c218c
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Location: cpp/openttd-patchpack/source/src/saveload/waypoint_sl.cpp
r27976:645fcc9c218c
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Change: Store station blocked/wires/pylons flags in map. (#11337)
This stores three flags in unused map bits, and avoids having to look up
station graphics and custom station specs to determine blocked/wires/pylons
status.
This potentially affects rail pathfinding performance.
Savegame version is not bumped, as the flags can just be updated every
time.
This stores three flags in unused map bits, and avoids having to look up
station graphics and custom station specs to determine blocked/wires/pylons
status.
This potentially affects rail pathfinding performance.
Savegame version is not bumped, as the flags can just be updated every
time.
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* 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 waypoint_sl.cpp Code handling saving and loading of waypoints */
#include "../stdafx.h"
#include "../waypoint_base.h"
#include "../debug.h"
#include "../newgrf_station.h"
#include "../vehicle_base.h"
#include "../town.h"
#include "../newgrf.h"
#include "../timer/timer_game_calendar.h"
#include "table/strings.h"
#include "saveload_internal.h"
#include "../safeguards.h"
/** Helper structure to convert from the old waypoint system. */
struct OldWaypoint {
size_t index;
TileIndex xy;
TownID town_index;
Town *town;
uint16_t town_cn;
StringID string_id;
std::string name;
uint8_t delete_ctr;
TimerGameCalendar::Date build_date;
uint8_t localidx;
uint32_t grfid;
const StationSpec *spec;
Owner owner;
size_t new_index;
};
/** Temporary array with old waypoints. */
static std::vector<OldWaypoint> _old_waypoints;
/**
* Update the waypoint orders to get the new waypoint ID.
* @param o the order 'list' to check.
*/
static void UpdateWaypointOrder(Order *o)
{
if (!o->IsType(OT_GOTO_WAYPOINT)) return;
for (OldWaypoint &wp : _old_waypoints) {
if (wp.index != o->GetDestination()) continue;
o->SetDestination((DestinationID)wp.new_index);
return;
}
}
/**
* Perform all steps to upgrade from the old waypoints to the new version
* that uses station. This includes some old saveload mechanics.
*/
void MoveWaypointsToBaseStations()
{
/* In version 17, ground type is moved from m2 to m4 for depots and
* waypoints to make way for storing the index in m2. The custom graphics
* id which was stored in m4 is now saved as a grf/id reference in the
* waypoint struct. */
if (IsSavegameVersionBefore(SLV_17)) {
for (OldWaypoint &wp : _old_waypoints) {
if (wp.delete_ctr != 0) continue; // The waypoint was deleted
/* Waypoint indices were not added to the map prior to this. */
Tile tile = wp.xy;
tile.m2() = (StationID)wp.index;
if (HasBit(tile.m3(), 4)) {
wp.spec = StationClass::Get(STAT_CLASS_WAYP)->GetSpec(tile.m4() + 1);
}
}
} else {
/* As of version 17, we recalculate the custom graphic ID of waypoints
* from the GRF ID / station index. */
for (OldWaypoint &wp : _old_waypoints) {
StationClass* stclass = StationClass::Get(STAT_CLASS_WAYP);
for (uint i = 0; i < stclass->GetSpecCount(); i++) {
const StationSpec *statspec = stclass->GetSpec(i);
if (statspec != nullptr && statspec->grf_prop.grffile->grfid == wp.grfid && statspec->grf_prop.local_id == wp.localidx) {
wp.spec = statspec;
break;
}
}
}
}
if (!Waypoint::CanAllocateItem(_old_waypoints.size())) SlError(STR_ERROR_TOO_MANY_STATIONS_LOADING);
/* All saveload conversions have been done. Create the new waypoints! */
for (OldWaypoint &wp : _old_waypoints) {
TileIndex t = wp.xy;
/* Sometimes waypoint (sign) locations became disconnected from their actual location in
* the map array. If this is the case, try to locate the actual location in the map array */
if (!IsTileType(t, MP_RAILWAY) || GetRailTileType(t) != 2 /* RAIL_TILE_WAYPOINT */ || Tile(t).m2() != wp.index) {
Debug(sl, 0, "Found waypoint tile {} with invalid position", t);
for (t = 0; t < Map::Size(); t++) {
if (IsTileType(t, MP_RAILWAY) && GetRailTileType(t) == 2 /* RAIL_TILE_WAYPOINT */ && Tile(t).m2() == wp.index) {
Debug(sl, 0, "Found actual waypoint position at {}", t);
break;
}
}
}
if (t == Map::Size()) {
SlErrorCorrupt("Waypoint with invalid tile");
}
Waypoint *new_wp = new Waypoint(t);
new_wp->town = wp.town;
new_wp->town_cn = wp.town_cn;
new_wp->name = wp.name;
new_wp->delete_ctr = 0; // Just reset delete counter for once.
new_wp->build_date = wp.build_date;
new_wp->owner = wp.owner;
new_wp->string_id = STR_SV_STNAME_WAYPOINT;
/* The tile might've been reserved! */
Tile tile(t);
bool reserved = !IsSavegameVersionBefore(SLV_100) && HasBit(tile.m5(), 4);
/* The tile really has our waypoint, so reassign the map array */
MakeRailWaypoint(tile, GetTileOwner(tile), new_wp->index, (Axis)GB(tile.m5(), 0, 1), 0, GetRailType(tile));
new_wp->facilities |= FACIL_TRAIN;
new_wp->owner = GetTileOwner(tile);
SetRailStationReservation(tile, reserved);
if (wp.spec != nullptr) {
SetCustomStationSpecIndex(tile, AllocateSpecToStation(wp.spec, new_wp, true));
}
new_wp->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
wp.new_index = new_wp->index;
}
/* Update the orders of vehicles */
for (OrderList *ol : OrderList::Iterate()) {
if (ol->GetFirstSharedVehicle()->type != VEH_TRAIN) continue;
for (Order *o = ol->GetFirstOrder(); o != nullptr; o = o->next) UpdateWaypointOrder(o);
}
for (Vehicle *v : Vehicle::Iterate()) {
if (v->type != VEH_TRAIN) continue;
UpdateWaypointOrder(&v->current_order);
}
ResetOldWaypoints();
}
void ResetOldWaypoints()
{
_old_waypoints.clear();
_old_waypoints.shrink_to_fit();
}
static const SaveLoad _old_waypoint_desc[] = {
SLE_CONDVAR(OldWaypoint, xy, SLE_FILE_U16 | SLE_VAR_U32, SL_MIN_VERSION, SLV_6),
SLE_CONDVAR(OldWaypoint, xy, SLE_UINT32, SLV_6, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, town_index, SLE_UINT16, SLV_12, SLV_122),
SLE_CONDREF(OldWaypoint, town, REF_TOWN, SLV_122, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, town_cn, SLE_FILE_U8 | SLE_VAR_U16, SLV_12, SLV_89),
SLE_CONDVAR(OldWaypoint, town_cn, SLE_UINT16, SLV_89, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, string_id, SLE_STRINGID, SL_MIN_VERSION, SLV_84),
SLE_CONDSSTR(OldWaypoint, name, SLE_STR, SLV_84, SL_MAX_VERSION),
SLE_VAR(OldWaypoint, delete_ctr, SLE_UINT8),
SLE_CONDVAR(OldWaypoint, build_date, SLE_FILE_U16 | SLE_VAR_I32, SLV_3, SLV_31),
SLE_CONDVAR(OldWaypoint, build_date, SLE_INT32, SLV_31, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, localidx, SLE_UINT8, SLV_3, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, grfid, SLE_UINT32, SLV_17, SL_MAX_VERSION),
SLE_CONDVAR(OldWaypoint, owner, SLE_UINT8, SLV_101, SL_MAX_VERSION),
};
struct CHKPChunkHandler : ChunkHandler {
CHKPChunkHandler() : ChunkHandler('CHKP', CH_READONLY) {}
void Load() const override
{
/* Precaution for when loading failed and it didn't get cleared */
ResetOldWaypoints();
int index;
while ((index = SlIterateArray()) != -1) {
OldWaypoint *wp = &_old_waypoints.emplace_back();
wp->index = index;
SlObject(wp, _old_waypoint_desc);
}
}
void FixPointers() const override
{
for (OldWaypoint &wp : _old_waypoints) {
SlObject(&wp, _old_waypoint_desc);
if (IsSavegameVersionBefore(SLV_12)) {
wp.town_cn = (wp.string_id & 0xC000) == 0xC000 ? (wp.string_id >> 8) & 0x3F : 0;
wp.town = ClosestTownFromTile(wp.xy, UINT_MAX);
} else if (IsSavegameVersionBefore(SLV_122)) {
/* Only for versions 12 .. 122 */
if (!Town::IsValidID(wp.town_index)) {
/* Upon a corrupted waypoint we'll likely get here. The next step will be to
* loop over all Ptrs procs to nullptr the pointers. However, we don't know
* whether we're in the nullptr or "normal" Ptrs proc. So just clear the list
* of old waypoints we constructed and then this waypoint (and the other
* possibly corrupt ones) will not be queried in the nullptr Ptrs proc run. */
_old_waypoints.clear();
SlErrorCorrupt("Referencing invalid Town");
}
wp.town = Town::Get(wp.town_index);
}
if (IsSavegameVersionBefore(SLV_84)) {
wp.name = CopyFromOldName(wp.string_id);
}
}
}
};
static const CHKPChunkHandler CHKP;
static const ChunkHandlerRef waypoint_chunk_handlers[] = {
CHKP,
};
extern const ChunkHandlerTable _waypoint_chunk_handlers(waypoint_chunk_handlers);
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