167 lines
4.5 KiB
C
167 lines
4.5 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: emf.h
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//
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// Contents: Declaration of CEMfObject
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//
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// Classes: CEMfObject
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//
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// History: dd-mmm-yy Author Comment
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// 01-Feb-95 t-ScottH add Dump method to CEMfObject
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// 12-May-94 DavePl created
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//
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//--------------------------------------------------------------------------
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#include "olepres.h"
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#include "olecache.h"
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#include "cachenod.h"
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// The following number adjusts the count of records processed by
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// our EMF enumeration function before the user's callback function
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// is run.
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#define EMF_RECORD_COUNT 20
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// Enumeration to indicate which format a hEMF is to be serialized as.
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// Values are not indicative of anything, just non-zero and non-one to
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// make it easier to catch bogus values while debugging
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typedef enum tagEMFWRITETYPE
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{
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WRITE_AS_WMF = 13,
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WRITE_AS_EMF = 17
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} EMFWRITETYPE;
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//+-------------------------------------------------------------------------
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//
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// Class: CEMfObject
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//
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// Purpose: Enhanced Metafile presentation object
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//
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// Interface: IOlePresObj
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//
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// History: dd-mmm-yy Author Comment
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// 01-Feb-95 t-ScottH add Dump method (_DEBUG only) (this method
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// is also a method in IOlePresObj
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// 12-May-94 DavePl Created
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//
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//--------------------------------------------------------------------------
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class FAR CEMfObject : public IOlePresObj, public CPrivAlloc
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{
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public:
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CEMfObject(LPCACHENODE pCacheNode, DWORD dwAspect);
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~CEMfObject();
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STDMETHOD (QueryInterface) (THIS_ REFIID riid,
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void ** ppvObj);
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STDMETHOD_(ULONG,AddRef) (THIS);
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STDMETHOD_(ULONG,Release) (THIS);
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STDMETHOD (GetData) (THIS_ LPFORMATETC pformatetcIn,
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LPSTGMEDIUM pmedium );
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STDMETHOD (GetDataHere) (THIS_ LPFORMATETC pformatetcIn,
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LPSTGMEDIUM pmedium );
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STDMETHOD (SetDataWDO) (THIS_ LPFORMATETC pformatetc,
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STGMEDIUM FAR * pmedium,
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BOOL fRelease, IDataObject * pdo);
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STDMETHOD (Draw) (THIS_ void * pvAspect,
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HDC hicTargetDev,
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HDC hdcDraw,
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LPCRECTL lprcBounds,
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LPCRECTL lprcWBounds,
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int (CALLBACK * pfnContinue)(ULONG_PTR),
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ULONG_PTR dwContinue);
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STDMETHOD (Load) (THIS_ LPSTREAM pstm,
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BOOL fReadHeaderOnly);
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STDMETHOD (Save) (THIS_ LPSTREAM pstm);
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STDMETHOD (GetExtent) (THIS_ DWORD dwAspect,
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LPSIZEL lpsizel);
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STDMETHOD (GetColorSet) (void * pvAspect,
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HDC hicTargetDev,
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LPLOGPALETTE * ppColorSet);
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STDMETHOD_(BOOL, IsBlank) (void);
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STDMETHOD_(void, DiscardHPRES) (void);
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int CALLBACK CallbackFuncForDraw (HDC hdc,
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HANDLETABLE * lpHTable,
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const ENHMETARECORD * lpEMFR,
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int nObj,
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LPARAM lpobj);
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#ifdef _DEBUG
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STDMETHOD(Dump) (THIS_ char **ppszDump, ULONG ulFlag, int nIndentLevel);
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#endif // _DEBUG
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private:
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INTERNAL ChangeData (HENHMETAFILE hEMfp, BOOL fDelete);
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INTERNAL_(HENHMETAFILE) LoadHPRES (void);
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INTERNAL_(HENHMETAFILE) GetCopyOfHPRES (void);
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inline HENHMETAFILE M_HPRES(void);
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ULONG m_ulRefs;
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HENHMETAFILE m_hPres;
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BOOL m_fMetaDC;
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int m_nRecord;
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HRESULT m_error;
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LPLOGPALETTE m_pColorSet;
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int (CALLBACK * m_pfnContinue)(ULONG_PTR);
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ULONG_PTR m_dwContinue;
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DWORD m_dwAspect;
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DWORD m_dwSize;
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LONG m_lWidth;
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LONG m_lHeight;
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LPCACHENODE m_pCacheNode;
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};
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// This is the prototype for the callback function which
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// will enumerate over the enhanced metafile records.
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int CALLBACK EMfCallbackFuncForDraw (HDC hdc,
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HANDLETABLE * pHTable,
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const ENHMETARECORD * pMFR,
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int nObj,
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LPARAM lpobj);
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// Utility function to de-serialize an enhanced metafile from
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// a stream, and create a usable handle to it
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FARINTERNAL UtGetHEMFFromEMFStm(LPSTREAM lpstream,
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DWORD * dwSize,
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HENHMETAFILE * lphPres);
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// Utility function which takes a handle to an enhanced metafile
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// and serializes the associated metafile to a stream
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FARINTERNAL UtHEMFToEMFStm(HENHMETAFILE hEMF,
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DWORD dwSize,
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LPSTREAM lpstream,
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EMFWRITETYPE type);
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// A utility function to check whether or not a DC in question
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// is a standard DC or a metafile DC.
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STDAPI_(BOOL) OleIsDcMeta (HDC hdc);
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