#ifndef _LZWDECOMPRESSION_HPP_
#define _LZWDECOMPRESSION_HPP_
#include <string.h>
#include <mdiwin/windows.hpp>
#include <mdiwin/types.hpp>
#include <mdiwin/istream.hpp>
class LZWDecompression : public IStream
{
public:
	LZWDecompression(const char *pathFileName);
	virtual ~LZWDecompression();
	enum{CMASKSIZE=9,STARTTABLESIZE=5,INCTABLESIZE=5};
  enum{OUTROWSIZE=2048,CTSIZE=4096,STACKSIZE=4096};
	void unpackData(USHORT imageWide,USHORT imageDeep,USHORT isInterlaced,USHORT pixelSize);
protected:
	virtual void errorHandler(CHAR *errorMessage);
	virtual void showHandler(UCHAR FAR *lpOutRow,USHORT yLocation);
private:
	void cleanup(void);
	void flush(void);
	void initializeTable(SHORT clearCode);
	WORD insertCode(SHORT code);
	void putx(SHORT code,SHORT pixelSize);
	void doPixel(CHAR tempCode);
	USHORT getCode(USHORT reqct);
	USHORT getBCode(USHORT code);
	UCHAR getGB(void);

	static USHORT mcMask[];
	static USHORT mStartTable[];
	static USHORT mIncTable[];
	static CHAR errorMessage[];
	USHORT mImageWide;
	USHORT mImageDeep;
	USHORT mIsInterlaced;
	USHORT mOldCode;
	USHORT mNextCode;
	USHORT mCode;
	USHORT mPixelSize;
	USHORT mNextLimit;
	USHORT mBufferCount;
	USHORT mRemct;
	USHORT mReqct;
	USHORT mRem;
	USHORT mPass;
	USHORT mxLocation;
	USHORT myLocation;
	USHORT mRowCount;
	CHAR FAR *mlpctFirst;
	CHAR FAR *mlpctLast;
	SHORT FAR *mlpctLink;
	UCHAR FAR *mlpOutRow;
	UCHAR FAR *mlpStack;

	HGLOBAL mhGlobalctFirst;
	HGLOBAL mhGlobalctLast;
	HGLOBAL mhGlobalctLink;
	HGLOBAL mhGlobalOutRow;
	HGLOBAL mhGlobalStack;
	WORD mIsConstructed;
};
#endif