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diff --git a/engines/lab/speciallocks.h b/engines/lab/speciallocks.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+/*
+ * This code is based on Labyrinth of Time code with assistance of
+ *
+ * Copyright (c) 1993 Terra Nova Development
+ * Copyright (c) 2004 The Wyrmkeep Entertainment Co.
+ *
+ */
+
+#ifndef LAB_TILEPUZZLE_H
+#define LAB_TILEPUZZLE_H
+
+#include "common/savefile.h"
+
+namespace Lab {
+
+class LabEngine;
+
+class SpecialLocks {
+private:
+	LabEngine *_vm;
+	Image *_tiles[16];
+	Image *_numberImages[10];
+	uint16 _curTile[4][4];
+	byte _combination[6];
+
+public:
+	SpecialLocks(LabEngine *vm);
+	~SpecialLocks();
+
+	void showTileLock(const Common::String filename, bool showSolution);
+
+	/**
+	 * Processes mouse clicks and changes tile positions.
+	 */
+	void tileClick(Common::Point pos);
+
+	void showCombinationLock(const Common::String filename);
+
+	/**
+	 * Processes mouse clicks and changes the door combination.
+	 */
+	void combinationClick(Common::Point pos);
+
+	void save(Common::OutSaveFile *file);
+	void load(Common::InSaveFile *file);
+
+private:
+	/**
+	 * Changes the combination number of one of the slots
+	 */
+	void changeCombination(uint16 number);
+
+	/**
+	 * Changes the tile positions in the tile puzzle
+	 */
+	void changeTile(uint16 col, uint16 row);
+
+	/**
+	 * Draws the images of the combination lock to the display bitmap.
+	 */
+	void doTile(bool showsolution);
+
+	/**
+	 * Does the scrolling for the tiles on the tile puzzle.
+	 */
+	void doTileScroll(uint16 col, uint16 row, uint16 scrolltype);
+	void scrollRaster(int16 dx, int16 dy, uint16 x1, uint16 y1, uint16 x2, uint16 y2, byte *buffer);
+};
+
+} // End of namespace Lab
+
+#endif // LAB_TILEPUZZLE_H