//////////////////////////////////////////////////////////////////////////////
//文件 MetaFile.h
//主要功能: 
//
//程序编写:		2005-12-07
/////////////////////////////////////////////////////////////////////////////

#ifndef __CMETAFILE_H__
#define __CMETAFILE_H__

#include ".\pointnamerect.h"
#include "..\DrawImage\ImageBase.h"
#include "imageinsert.h"

#define	METAFILE_VERSION	1

class AFX_EXT_CLASS CMetaFile : public CPointNameRect
{
public:
	CMetaFile(void);
	~CMetaFile(void);

	void Serialize(CArchive& ar, const short &ver) override;
	virtual int Read (CFile &fr, const short& ver);
	int ReadWmf(CFile &fr, const short& ver);
	virtual void Write(CFile &fw, const short& ver);
	virtual void Clear(void);

	virtual void WriteDML(CFile &fw, const short& ver, int nBaseTabNum);
	virtual int ReadDML(CFile &fr, const short &ver);

	virtual void WritePCG(CFile &fw, const short& ver, int nBaseTabNum);
	virtual int ReadPCG(CFile &fr, const short &ver);
	virtual int ReadPCG2(CFile &fr, const short &ver);

	void operator=(CMetaFile& mf);
	BOOL SaveMetaFile(LPCTSTR lpstrFileName);
	int  ReadMetaFile(LPCTSTR lpstrFileName);

	CSize GetWmfSize(void);			//获得WMF或EMF的原始尺寸
	void Draw(CDC* pDC, CRect rc);
	bool Decode(CFile * hFile, long nForceWidth=0, long nForceHeight=0);
	BOOL IsEmptyWMF();

	BOOL PastFromClipboard(void);
	BOOL CopyToClipboard(HWND hWnd=NULL);
	BOOL CopyHandle(HENHMETAFILE hMeta);
	BOOL CreateImage(CImageBase& image, CSize* pCustomImageSize=NULL);
	BOOL ToImage(CImageInsert& image);

protected:
	void ShrinkMetafile(CSize &size);//为了防止生成的图像尺寸太大
	BOOL BeforeWrite();

private:
#pragma pack(1)
	typedef struct tagRECT16
	{
		short int	left;
		short int	top;
		short int	right;
		short int	bottom;
	} RECT16;

	// taken from Windos 3.11 SDK Documentation (Programmer's Reference Volume 4: Resources)
	typedef struct tagMETAFILEHEADER
	{
		DWORD	key;		// always 0x9ac6cdd7
		WORD	reserved1;	// reserved = 0
		RECT16	bbox;		// bounding rectangle in metafile units as defined in "inch"
		WORD	inch;		// number of metafile units per inch (should be < 1440)
		DWORD	reserved2;	// reserved = 0
		WORD	checksum;	// sum of the first 10 WORDS (using XOR operator)
	} METAFILEHEADER;
#pragma pack()

	CSize wmfSize;
	HENHMETAFILE m_hMeta;
	BOOL CheckMetafileHeader(METAFILEHEADER *pmetafileheader);
	HENHMETAFILE ConvertWmfFiletoEmf(CFile *pFile, METAFILEHEADER *pmetafileheader);
	HENHMETAFILE ConvertEmfFiletoEmf(CFile *pFile, ENHMETAHEADER *pemfh);
public:
	int GetFileBuffer(BYTE** ppBuffer, DWORD& nBufSize);
	int SetFileBuffer(BYTE* pBuffer, DWORD nBufSize);

public:
	virtual int ReadPCG(void *pxp, const short &ver);
	virtual int ReadPCG2(void *pxp, const short &ver);
};

#endif	// __CMETAFILE_H__