// $Revision: 1.5 $
#ifndef Taligent_DECODEXBM
#define Taligent_DECODEXBM
//-----------------------------------------------------------------------------
//
// Copyright (C) 1995 Taligent, Inc. All rights reserved.
//
// Project:       WebRunner Sample
// File:          DecodeXBM.h
// Build/Version: 1.0.0
//
//-----------------------------------------------------------------------------

#ifndef Taligent_PRIMITIVETYPES
#include <Taligent/PrimitiveTypes.h>
#endif
#ifndef Taligent_GRAPHICIMAGE
#include <Taligent/GraphicImage.h>
#endif

//=============================================================================
// TXBMDecoder

class TXBMDecoder {
  public:
                          TXBMDecoder(TStream& inputStream);
                          ~TXBMDecoder();
	
    TModifiableImage*     OrphanImage();

  protected:
	typedef unsigned char XBMCode;

    void			      ParseHeader();
    void			      ParseBody();

    unsigned char	      GetNextByte();
	XBMCode               ReadOneCode();
	unsigned short        GetImageSize();

    static void		      ThrowBadData(const char* reason);

private:
    TStream*		      fStream;
    TModifiableImage*	  fImage;
    unsigned short	      fImageWidth;
    unsigned short	      fImageHeight;
};

#endif