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diff --git a/Source/OpenEXR/IlmImf/ImfPizCompressor.h b/Source/OpenEXR/IlmImf/ImfPizCompressor.h
new file mode 100644
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+++ b/Source/OpenEXR/IlmImf/ImfPizCompressor.h
@@ -0,0 +1,112 @@
+///////////////////////////////////////////////////////////////////////////
+//
+// 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_PIZ_COMPRESSOR_H
+#define INCLUDED_IMF_PIZ_COMPRESSOR_H
+
+//-----------------------------------------------------------------------------
+//
+//	class PizCompressor -- uses Wavelet and Huffman encoding.
+//
+//-----------------------------------------------------------------------------
+
+#include <ImfCompressor.h>
+
+namespace Imf {
+
+class ChannelList;
+
+
+class PizCompressor: public Compressor
+{
+  public:
+
+    PizCompressor (const Header &hdr, int maxScanLineSize, int numScanLines);
+    virtual ~PizCompressor ();
+
+    virtual int		numScanLines () const;
+
+    virtual Format	format () const;
+
+    virtual int		compress (const char *inPtr,
+				  int inSize,
+				  int minY,
+				  const char *&outPtr);                  
+                  
+    virtual int		compressTile (const char *inPtr,
+				      int inSize,
+				      Imath::Box2i range,
+				      const char *&outPtr);
+
+    virtual int		uncompress (const char *inPtr,
+				    int inSize,
+				    int minY,
+				    const char *&outPtr);
+                    
+    virtual int		uncompressTile (const char *inPtr,
+					int inSize,
+					Imath::Box2i range,
+					const char *&outPtr);
+  private:
+
+    struct ChannelData;
+    
+    int			compress (const char *inPtr,
+				  int inSize,
+				  Imath::Box2i range,
+				  const char *&outPtr);
+ 
+    int			uncompress (const char *inPtr,
+				    int inSize,
+				    Imath::Box2i range,
+				    const char *&outPtr);
+
+    int			_maxScanLineSize;
+    Format		_format;
+    int			_numScanLines;
+    unsigned short *	_tmpBuffer;
+    char *		_outBuffer;
+    int			_numChans;
+    const ChannelList &	_channels;
+    ChannelData *	_channelData;
+    int			_minX;
+    int			_maxX;
+    int			_maxY;
+};
+
+
+} // namespace Imf
+
+#endif