common/rfb/Decoder.h

/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
 * 
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */
#ifndef __RFB_DECODER_H__
#define __RFB_DECODER_H__

#include <rfb/Rect.h>
#include <rfb/encodings.h>

namespace rfb {
  class CMsgReader;
  class CMsgHandler;
  class Decoder;
  typedef Decoder* (*DecoderCreateFnType)(CMsgReader*);

  class Decoder {
  public:
    virtual ~Decoder();
    virtual void readRect(const Rect& r, CMsgHandler* handler)=0;

    static bool supported(unsigned int encoding);
    static Decoder* createDecoder(unsigned int encoding, CMsgReader* reader);
    static void registerDecoder(unsigned int encoding,
                                DecoderCreateFnType createFn);
  private:
    static DecoderCreateFnType createFns[encodingMax+1];
  };

  class DecoderInit {
    static int count;
  public:
    DecoderInit();
  };

  static DecoderInit decoderInitObj;
}

#endif