Change: Allow all tiles around docks to be docking tiles

src/saveload/afterload.cpp

@@ -3106,14 +3106,14 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (IsSavegameVersionBeforeOrAt(SLV_ENDING_YEAR)) {
-		/* Update station docking tiles. Was only needed for pre-SLV_MULTITLE_DOCKS
-		 * savegames, but a bug in docking tiles touched all savegames between
-		 * SLV_MULTITILE_DOCKS and SLV_ENDING_YEAR. */
+	if (IsSavegameVersionBeforeOrAt(SLV_LINKGRAPH_TRAVEL_TIME)) {
+		/* All tiles around docks may be docking tiles. */
 		for (Station *st : Station::Iterate()) {
 			if (st->ship_station.tile != INVALID_TILE) UpdateStationDockingTiles(st);
 		}
+	}
 
+	if (IsSavegameVersionBeforeOrAt(SLV_ENDING_YEAR)) {
 		/* Reset roadtype/streetcartype info for non-road bridges. */
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) != TRANSPORT_ROAD) {

src/station_cmd.cpp

@@ -2635,23 +2635,15 @@ void ClearDockingTilesCheckingNeighbours(TileIndex tile)
 /**
  * Check if a dock tile can be docked from the given direction.
  * @param t Tile index of dock.
- * @param d DiagDirection adjacent to dock being tested.
+ * @param d DiagDirection adjacent to dock being tested. (unused)
  * @return True iff the dock can be docked from the given direction.
  */
 bool IsValidDockingDirectionForDock(TileIndex t, DiagDirection d)
 {
 	assert(IsDockTile(t));
 
-	/** Bitmap of valid directions for each dock tile part. */
-	static const uint8 _valid_docking_tile[] = {
-		0, 0, 0, 0,                        // No docking against the slope part.
-		1 << DIAGDIR_NE | 1 << DIAGDIR_SW, // Docking permitted at the end
-		1 << DIAGDIR_NW | 1 << DIAGDIR_SE, // of the flat piers.
-	};
-
 	StationGfx gfx = GetStationGfx(t);
-	assert(gfx < lengthof(_valid_docking_tile));
-	return HasBit(_valid_docking_tile[gfx], d);
+	return gfx >= GFX_DOCK_BASE_WATER_PART;
 }
 
 /**