jpegview.h

图象压缩算法的实现,十分具有参考价值的,赫赫有名

// JPEGView.h : interface of the CJPEGView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_JPEGVIEW_H__B56E4490_C2F0_4B31_BA1B_1B14ACA6C064__INCLUDED_)
#define AFX_JPEGVIEW_H__B56E4490_C2F0_4B31_BA1B_1B14ACA6C064__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CJPEGView : public CScrollView
{
protected: // create from serialization only
	CJPEGView();
	DECLARE_DYNCREATE(CJPEGView)

// Attributes
public:
	CJPEGDoc* GetDocument();

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CJPEGView)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	protected:
	virtual void OnInitialUpdate(); // called first time after construct
	virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
	virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
	virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
	virtual void OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint);
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CJPEGView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:
	CDib m_Dib;
// Generated message map functions
protected:
	//{{AFX_MSG(CJPEGView)
	afx_msg void OnFileOpen();
	afx_msg void OnFileSaveAs();
	afx_msg void OnIjpeg();
	afx_msg void OnUpdateIjpeg(CCmdUI* pCmdUI);
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	afx_msg BOOL OnJpeg();
	afx_msg void OnUpdateJpeg(CCmdUI* pCmdUI);
	afx_msg void OnInvert();
	afx_msg void OnInvertZhe();
	afx_msg void OnUpdateInvert(CCmdUI* pCmdUI);
	afx_msg void OnUpdateInvertZhe(CCmdUI* pCmdUI);
	afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in JPEGView.cpp
inline CJPEGDoc* CJPEGView::GetDocument()
   { return (CJPEGDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_JPEGVIEW_H__B56E4490_C2F0_4B31_BA1B_1B14ACA6C064__INCLUDED_)