//+-------------------------------------------------------------------------
//
//  Microsoft Windows
//  Copyright (C) Microsoft Corporation, 1992 - 1993.
//
//  File:	mf.h
//
//  Contents:	Declaration of CMfObject (metafile presentation object)
//
//  Classes:	CMfObject
//
//  Functions:
//
//  History:    dd-mmm-yy Author    Comment
//              01-Feb-95 t-ScottH  add Dump method to CMfObject
//		24-Jan-94 alexgo    first pass converting to Cairo style
//				    memory allocation
//		29-Nov-93 alexgo    32bit port
//
//--------------------------------------------------------------------------

#include "olepres.h"
#include "olecache.h"
#include "cachenod.h"

#define RECORD_COUNT	16

#ifndef _MAC

typedef struct _METADC
{
    	int 	xMwo;
    	int     yMwo;
    	int     xMwe;
    	int     yMwe;
    	int     xre;
    	int     yre;
    	struct _METADC FAR* pNext;
} METADC, *PMETADC, FAR* LPMETADC;

typedef struct _METAINFO
{
    	METADC	headDc;
    	int	xwo;
    	int	ywo;
    	int	xwe;
    	int	ywe;
    	int	xro;
    	int	yro;
} METAINFO, *PMETAINFO, FAR* LPMETAINFO;

#endif


//+-------------------------------------------------------------------------
//
//  Class:  	CMfObject
//
//  Purpose:    Metafile presentation object
//
//  Interface:  IOlePresObj
//
//  History:    dd-mmm-yy Author    Comment
//              01-Feb-95 t-ScottH  add Dump method (_DEBUG only) (this method
//                                  is also a method in IOlePresObj
//		29-Nov-93 alexgo    32bit port
//
//  Notes:
//
//--------------------------------------------------------------------------

class FAR CMfObject : public IOlePresObj, public CPrivAlloc
{
public:
  	 CMfObject(LPCACHENODE pCacheNode, DWORD dwAspect,
  	 	BOOL fConvert = FALSE);
  	 ~CMfObject(void);

    	STDMETHOD(QueryInterface) (THIS_ REFIID riid, LPVOID FAR* ppvObj);
    	STDMETHOD_(ULONG,AddRef) (THIS) ;
    	STDMETHOD_(ULONG,Release) (THIS);

    	STDMETHOD(GetData) (THIS_ LPFORMATETC pformatetcIn,
				LPSTGMEDIUM pmedium );
    	STDMETHOD(GetDataHere) (THIS_ LPFORMATETC pformatetcIn,
				LPSTGMEDIUM pmedium );							
    	
	STDMETHOD(SetDataWDO)    (THIS_ LPFORMATETC pformatetc,
    				STGMEDIUM FAR * pmedium,
				BOOL fRelease, IDataObject * pdo);
	
    	STDMETHOD(Draw) (THIS_ void FAR* pvAspect, HDC hicTargetDev,
    				HDC hdcDraw,
                    		LPCRECTL lprcBounds,
                    		LPCRECTL lprcWBounds,
				BOOL (CALLBACK * pfnContinue)(ULONG_PTR),
				ULONG_PTR dwContinue);
	STDMETHOD(GetExtent) (THIS_ DWORD dwAspect, LPSIZEL lpsizel);
	STDMETHOD(Load) (THIS_ LPSTREAM pstm, BOOL fReadHeaderOnly = FALSE);
	STDMETHOD(Save) (THIS_ LPSTREAM pstm);
	STDMETHOD(GetColorSet) (void FAR* pvAspect, HDC hicTargetDev,
				LPLOGPALETTE FAR* ppColorSet);
	STDMETHOD_(BOOL, IsBlank) (THIS);	
	STDMETHOD_(void, DiscardHPRES)(THIS);

#ifndef _MAC
	inline int CallbackFuncForDraw(HDC hdc, LPHANDLETABLE lpHTable,
				LPMETARECORD lpMFR, int nObj);

	inline int CallbackFuncForGetColorSet(HDC hdc, LPHANDLETABLE lpHTable,
				LPMETARECORD lpMFR, int nObj);
#endif
	
    #ifdef _DEBUG
        STDMETHOD(Dump) (THIS_ char **ppszDump, ULONG ulFlag, int nIndentLevel);
    #endif // _DEBUG
	
private:

#ifndef _MAC
	INTERNAL_(HANDLE)	GetHmfp (void);
	INTERNAL_(BOOL)		PopDc (void);
	INTERNAL_(BOOL)		PushDc (void);
	INTERNAL_(void)		CleanStack(void);
#endif

	INTERNAL		ChangeData (HANDLE hMfp, BOOL fDelete);
	INTERNAL_(HANDLE)	LoadHPRES(void);
	INTERNAL_(HANDLE)	GetCopyOfHPRES(void);

	INTERNAL_(void)		SetPictOrg (HDC, int, int, BOOL);
	INTERNAL_(void)		SetPictExt (HDC, int, int);
	INTERNAL_(void)		ScalePictExt (HDC, int, int, int, int);
	INTERNAL_(void)		ScaleRectExt (HDC, int, int, int, int);
	
shared_state:
	ULONG			m_ulRefs;
#ifdef _MAC
	PicHandle		m_hPres;
#else
    	HMETAFILE		m_hPres;

	// these are used only during draw
    	LPMETAINFO		m_pMetaInfo;
    	LPMETADC		m_pCurMdc;
    	BOOL			m_fMetaDC;
    	int			m_nRecord;
    	HRESULT			m_error;
	LPLOGPALETTE		m_pColorSet;
	BOOL			m_fConvert;
#endif	
	BOOL (CALLBACK * m_pfnContinue)(ULONG_PTR);
	ULONG_PTR      	        m_dwContinue;
	DWORD			m_dwAspect;
	DWORD			m_dwSize;
	LONG			m_lWidth;
	LONG			m_lHeight;
	LPCACHENODE		m_pCacheNode;	
        HPALETTE		m_hPalDCOriginal;
        HPALETTE		m_hPalLast;

};
	

INTERNAL_(DWORD) MfGetSize (LPHANDLE lphmf);

#ifndef _MAC
FARINTERNAL_(HMETAFILE)  QD2GDI(HANDLE);

int CALLBACK __loadds MfCallbackFuncForDraw(HDC hdc, HANDLETABLE FAR* lpHTable,
			METARECORD FAR* lpMFR, int  nObj, LPARAM lpobj);

int CALLBACK __loadds MfCallbackFuncForGetColorSet(HDC hdc,
			HANDLETABLE FAR* lpHTable,
			METARECORD FAR* lpMFR, int  nObj, LPARAM lpobj);
#endif