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Improve performance of updating railtypes when reloading NewGRFs.

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Now O(N) instead of O(N log N), and only traverses map once.
This commit is contained in:
Jonathan G Rennison
2016-04-08 20:27:00 +01:00
parent 75396c9b5f
commit d0aa4a53ed
1 changed files with 15 additions and 19 deletions
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34
src/saveload/afterload.cpp
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@@ -3264,19 +3264,9 @@ bool AfterLoadGame()
*/
void ReloadNewGRFData()
{
TileIndex map_size = MapSize();
/* Backup railtype labels for all rail tiles. The railtype info array will be resorted. */
std::map<TileIndex, RailTypeLabel> rail_type_label_backups;
for (TileIndex t = 0; t < map_size; t++) {
if (GetTileType(t) == MP_RAILWAY ||
IsLevelCrossingTile(t) ||
IsRailStationTile(t) ||
IsRailWaypointTile(t) ||
IsRailTunnelBridgeTile(t)) {
rail_type_label_backups[t] = GetRailTypeInfo(GetRailType(t))->label;
}
RailTypeLabel rail_type_label_map[RAILTYPE_END];
for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
rail_type_label_map[rt] = GetRailTypeInfo(rt)->label;
}
/* reload grf data */
@@ -3305,15 +3295,21 @@ void ReloadNewGRFData()
CheckTrainsLengths();
AfterLoadTemplateVehiclesUpdateImage();
RailType rail_type_translate_map[RAILTYPE_END];
for (RailType old_type = RAILTYPE_BEGIN; old_type != RAILTYPE_END; old_type++) {
RailType new_type = GetRailTypeByLabel(rail_type_label_map[old_type]);
rail_type_translate_map[old_type] = (new_type == INVALID_RAILTYPE) ? RAILTYPE_RAIL : new_type;
}
/* Restore correct railtype for all rail tiles.*/
const TileIndex map_size = MapSize();
for (TileIndex t = 0; t < map_size; t++) {
if (GetTileType(t) == MP_RAILWAY ||
IsLevelCrossingTile(t) ||
IsRailStationTile(t) ||
IsRailWaypointTile(t) ||
IsRailTunnelBridgeTile(t)) {
RailType old_type = GetRailTypeByLabel(rail_type_label_backups[t]);
SetRailType(t, (old_type == INVALID_RAILTYPE) ? RAILTYPE_RAIL : old_type);
IsLevelCrossingTile(t) ||
IsRailStationTile(t) ||
IsRailWaypointTile(t) ||
IsRailTunnelBridgeTile(t)) {
SetRailType(t, rail_type_translate_map[GetRailType(t)]);
}
}
}