///////////////////////////////////////////////////////////////////////////

//

// 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.

//

///////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------

//

//	class ZipCompressor

//

//-----------------------------------------------------------------------------

#include "ImfZipCompressor.h"

#include "ImfCheckedArithmetic.h"

#include "Iex.h"

#include <zlib.h>

#include "ImfNamespace.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER

ZipCompressor::ZipCompressor

    (const Header &hdr,

     size_t maxScanLineSize,

     size_t numScanLines)

:

    Compressor (hdr),

    _maxScanLineSize (maxScanLineSize),

    _numScanLines (numScanLines),

    _outBuffer (0),

    _zip(maxScanLineSize, numScanLines)

{

    _outBuffer = new char[_zip.maxCompressedSize()];

}

ZipCompressor::~ZipCompressor ()

{

    delete [] _outBuffer;

}

int

ZipCompressor::numScanLines () const

{

    return _numScanLines;

}

int

ZipCompressor::compress (const char *inPtr,

			 int inSize,

			 int minY,

			 const char *&outPtr)

{

    //

    // Special case �- empty input buffer

    //

    if (inSize == 0)

    {

	outPtr = _outBuffer;

	return 0;

    }

    int outSize = _zip.compress(inPtr, inSize, _outBuffer);

    outPtr = _outBuffer;

    return outSize;

}

int

ZipCompressor::uncompress (const char *inPtr,

			   int inSize,

			   int minY,

			   const char *&outPtr)

{

    //

    // Special case �- empty input buffer

    //

    if (inSize == 0)

    {

	outPtr = _outBuffer;

	return 0;

    }

    int outSize = _zip.uncompress(inPtr, inSize, _outBuffer);

    outPtr = _outBuffer;

    return outSize;

}

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT