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      1 ///////////////////////////////////////////////////////////////////////////
      2 //
      3 // Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
      4 // Digital Ltd. LLC
      5 //
      6 // All rights reserved.
      7 //
      8 // Redistribution and use in source and binary forms, with or without
      9 // modification, are permitted provided that the following conditions are
     10 // met:
     11 // *       Redistributions of source code must retain the above copyright
     12 // notice, this list of conditions and the following disclaimer.
     13 // *       Redistributions in binary form must reproduce the above
     14 // copyright notice, this list of conditions and the following disclaimer
     15 // in the documentation and/or other materials provided with the
     16 // distribution.
     17 // *       Neither the name of Industrial Light & Magic nor the names of
     18 // its contributors may be used to endorse or promote products derived
     19 // from this software without specific prior written permission.
     20 //
     21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32 //
     33 ///////////////////////////////////////////////////////////////////////////
     34 
     35 
     36 
     37 #ifndef INCLUDED_IMF_RLE_COMPRESSOR_H
     38 #define INCLUDED_IMF_RLE_COMPRESSOR_H
     39 
     40 //-----------------------------------------------------------------------------
     41 //
     42 //	class RleCompressor -- performs run-length encoding
     43 //
     44 //-----------------------------------------------------------------------------
     45 
     46 #include <ImfCompressor.h>
     47 
     48 namespace Imf {
     49 
     50 
     51 class RleCompressor: public Compressor
     52 {
     53   public:
     54 
     55     RleCompressor (const Header &hdr, size_t maxScanLineSize);
     56     virtual ~RleCompressor ();
     57 
     58     virtual int numScanLines () const;
     59 
     60     virtual int	compress (const char *inPtr,
     61               int inSize,
     62               int minY,
     63               const char *&outPtr);
     64 
     65     virtual int	uncompress (const char *inPtr,
     66                 int inSize,
     67                 int minY,
     68                 const char *&outPtr);
     69   private:
     70 
     71     int		_maxScanLineSize;
     72     char *	_tmpBuffer;
     73     char *	_outBuffer;
     74 };
     75 
     76 
     77 } // namespace Imf
     78 
     79 #endif
     80