imfzipcompressor.cpp

image converter source code

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



//-----------------------------------------------------------------------------
//
//	class ZipCompressor
//
//-----------------------------------------------------------------------------

#include <ImfZipCompressor.h>
#include "Iex.h"
#include <zlib.h>

namespace Imf {


ZipCompressor::ZipCompressor
    (const Header &hdr,
     int maxScanLineSize,
     int numScanLines)
:
    Compressor (hdr),
    _maxScanLineSize (maxScanLineSize),
    _numScanLines (numScanLines),
    _tmpBuffer (0),
    _outBuffer (0)
{
    _tmpBuffer =
	new char [maxScanLineSize * numScanLines];

    _outBuffer =
	new char [int (ceil (maxScanLineSize * numScanLines * 1.01)) + 100];
}


ZipCompressor::~ZipCompressor ()
{
    delete [] _tmpBuffer;
    delete [] _outBuffer;
}


int
ZipCompressor::numScanLines () const
{
    return _numScanLines;
}


int
ZipCompressor::compress (const char *inPtr,
			 int inSize,
			 int minY,
			 const char *&outPtr)
{
    //
    // Special case