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diff --git a/Source/OpenEXR/IlmImf/ImfTileOffsets.h b/Source/OpenEXR/IlmImf/ImfTileOffsets.h
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+++ b/Source/OpenEXR/IlmImf/ImfTileOffsets.h
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+///////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
+// Digital Ltd. LLC
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+// *       Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// *       Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// *       Neither the name of Industrial Light & Magic nor the names of
+// its contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+///////////////////////////////////////////////////////////////////////////
+
+
+#ifndef INCLUDED_IMF_TILE_OFFSETS_H
+#define INCLUDED_IMF_TILE_OFFSETS_H
+
+//-----------------------------------------------------------------------------
+//
+//	class TileOffsets
+//
+//-----------------------------------------------------------------------------
+
+#include <ImfTileDescription.h>
+#include <ImfInt64.h>
+#include <vector>
+
+namespace Imf {
+
+class IStream;
+class OStream;
+
+
+class TileOffsets
+{
+  public:
+
+    TileOffsets (LevelMode mode = ONE_LEVEL,
+		 int numXLevels = 0,
+		 int numYLevels = 0,
+		 const int *numXTiles = 0,
+		 const int *numYTiles = 0);    
+
+    // --------
+    // File I/O
+    // --------
+
+    void		readFrom (IStream &is, bool &complete);
+    Int64		writeTo (OStream &os) const;
+
+
+    //-----------------------------------------------------------
+    // Test if the tileOffsets array is empty (all entries are 0)
+    //-----------------------------------------------------------
+
+    bool		isEmpty () const;
+    
+
+    //-----------------------
+    // Access to the elements
+    //-----------------------
+
+    Int64 &		operator () (int dx, int dy, int lx, int ly);
+    Int64 &		operator () (int dx, int dy, int l);
+    const Int64 &	operator () (int dx, int dy, int lx, int ly) const;
+    const Int64 &	operator () (int dx, int dy, int l) const;
+
+  private:
+  
+    void		findTiles (IStream &is);
+    void		reconstructFromFile (IStream &is);
+    bool		readTile (IStream &is);
+    bool		anyOffsetsAreInvalid () const;
+    bool		isValidTile (int dx, int dy, int lx, int ly) const;
+
+    LevelMode		_mode;
+    int			_numXLevels;
+    int			_numYLevels;
+
+    std::vector<std::vector<std::vector <Int64> > > _offsets;
+};
+
+
+} // namespace Imf
+
+#endif