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ImfPxr24Compressor.h

#ifndef INCLUDED_IMF_PXR24_COMPRESSOR_H
#define INCLUDED_IMF_PXR24_COMPRESSOR_H

/////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Pixar Animation Studios
//
// 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 Pixar Animation Studios 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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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/////////////////////////////////////////////////////////////////////////////

//-----------------------------------------------------------------------------
//
//    class Pxr24Compressor -- Loren Carpenter's 24-bit float compressor
//
//-----------------------------------------------------------------------------

#include <ImfCompressor.h>

namespace Imf {

class ChannelList;


00050 class Pxr24Compressor: public Compressor
{
  public:

    Pxr24Compressor (const Header &hdr, int maxScanLineSize, int numScanLines);
    virtual ~Pxr24Compressor ();

    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:

    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;
    int                 _numScanLines;
    unsigned char *     _tmpBuffer;
    char *        _outBuffer;
    const ChannelList & _channels;
    int                 _minX;
    int                 _maxX;
    int                 _maxY;
};


} // namespace Imf

#endif

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