myexpdoc.cpp

1. 实现BMP文件到JPEG文件的压缩转换。 2. 自选：实现从JPEG文件到BMP文件转换。 3. 采用C/C++编写程序

// MyExpDoc.cpp : implementation of the CMyExpDoc class
//

#include "stdafx.h"
#include "MyExp.h"

#include "MyExpDoc.h"
#include"FormatJpeg2.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMyExpDoc

IMPLEMENT_DYNCREATE(CMyExpDoc, CDocument)

BEGIN_MESSAGE_MAP(CMyExpDoc, CDocument)
	//{{AFX_MSG_MAP(CMyExpDoc)
	ON_COMMAND(ID_FILE_SAVE_AS, OnFileSaveAs)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyExpDoc construction/destruction

CMyExpDoc::CMyExpDoc()
{
	// TODO: add one-time construction code here
	//InitDocVariable();
	m_pDib=new CDib;
}

CMyExpDoc::~CMyExpDoc()
{
		//FreeDocVariable();
		delete m_pDib;

}

BOOL CMyExpDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CMyExpDoc serialization

void CMyExpDoc::Serialize(CArchive& ar)
{	
	m_pDib->Serialize(ar);//-----------
	if (ar.IsStoring())
	{
		// TODO: add storing code here
	}
	else
	{
		// TODO: add loading code here
	}
}

/////////////////////////////////////////////////////////////////////////////
// CMyExpDoc diagnostics

#ifdef _DEBUG
void CMyExpDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CMyExpDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMyExpDoc commands

/*
int CMyExpDoc::InitDocVariable()
{
	m_pDibInit = new CDib;

	// added by tanhc in 2002-7-30, used to test some function
	m_pDibTest = new CDib;

	m_nColorIndex = 0;

	//--------------------------------------------

	return 0;
}

int CMyExpDoc::FreeDocVariable()
{
	delete m_pDibInit;
	m_pDibInit = NULL;

	// added by tanhc in 2002-7-30, used to test some function
	delete m_pDibTest ;
	m_pDibTest = NULL ;

	//--------------------------------------------

	return 0;
}
*/
BOOL CMyExpDoc::OnOpenDocument(LPCTSTR lpszPathName) 
{
	char drive[_MAX_DRIVE];   
	char dir[_MAX_DIR];
	char fname[_MAX_FNAME];   
	char ext[_MAX_EXT];
	_splitpath((LPCSTR)lpszPathName, drive, dir, fname, ext);
		if (! stricmp(ext, ".jpg") ||
			 ! stricmp(ext, ".jpe") ||
			 ! stricmp(ext, ".jpeg") ) // JPEG file
	{
	CJpeg jpeg;
		if (! jpeg.Load(lpszPathName))
			return FALSE;

		HDIB hDIB = CopyHandle(jpeg.GetDib()->GetHandle());
		if (hDIB == NULL)
			return FALSE;
		m_pDib->Attach(hDIB);
		return TRUE;
	
	}
	
	return CDocument::OnOpenDocument(lpszPathName);



}

void CMyExpDoc::OnFileSaveAs() 
{
	// TODO: Add your command handler code here
		CString szSaveFilter= "单色位图 (*.bmp;*.dib)|*.bmp; *.dib|16色位图 (*.bmp;*.dib)|*.bmp; *.dib|256色位图 (*.bmp;*.dib)|*.bmp; *.dib|24位位图 (*.bmp;*.dib)|*.bmp; *.dib|JPEG文件 (*.jpg;*.jpe;*.jpeg)|*.jpg; *.jpe; *.jpeg|All Files (*.*)|*.*||";

	CFileDialog FileDlg(FALSE, "*.bmp", NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szSaveFilter);

	CString strPathName = GetPathName();
	char drive[_MAX_DRIVE];   
	char dir[_MAX_DIR];
	char fname[_MAX_FNAME];   
	char ext[_MAX_EXT];
	_splitpath((LPCSTR)strPathName, drive, dir, fname, ext);
	
	 if (! stricmp(ext, ".jpg") ||
			 ! stricmp(ext, ".jpe") ||
			 ! stricmp(ext, ".jpeg") ) // JPEG file
		FileDlg.m_ofn.nFilterIndex = 5;
	
	else
	{
		switch (m_pDib->GetBitCount())
		{
		case 1:
			FileDlg.m_ofn.nFilterIndex = 1;
			break;
		case 4:
			FileDlg.m_ofn.nFilterIndex = 2;
			break;
		case 8:
			FileDlg.m_ofn.nFilterIndex = 3;
			break;
		case 24:
		default:
			FileDlg.m_ofn.nFilterIndex = 4;
			break;
		}
	}

	if (FileDlg.DoModal() == IDOK)
	{
		switch (FileDlg.m_ofn.nFilterIndex)
		{
		case 5:
				break;
		case 1:
			m_pDib->ConvertFormat(1);
			break;
		case 2:
			m_pDib->ConvertFormat(4);
			break;
		case 3:
			m_pDib->ConvertFormat(8);
			break;
		case 4:
		default:
			m_pDib->ConvertFormat(24);
			break;
		}

		OnSaveDocument(FileDlg.m_ofn.lpstrFile);
		SetPathName(FileDlg.m_ofn.lpstrFile);
		SetTitle(FileDlg.m_ofn.lpstrFile);
		UpdateAllViews(NULL);
		SetModifiedFlag(FALSE);
	}
}

BOOL CMyExpDoc::OnSaveDocument(LPCTSTR lpszPathName) 
{
	// TODO: Add your specialized code here and/or call the base class
	
	//获取文件信息
	char drive[_MAX_DRIVE];   
	char dir[_MAX_DIR];
	char fname[_MAX_FNAME];   
	char ext[_MAX_EXT];
	_splitpath(lpszPathName, drive, dir, fname, ext);  
	//判断是否JPEG文件
	 if (! stricmp(ext, ".jpg") ||
			 ! stricmp(ext, ".jpe") ||
			 ! stricmp(ext, ".jpeg") ) // JPEG file
	{
		 //创建CFormatJpeg对话框
		CFormatJpeg JpegDlg;
		if (JpegDlg.DoModal() == IDOK)
		{
			//创建CJpeg类
			CJpeg jpeg;
			//将文件存储为JPEG格式
			return jpeg.Save(lpszPathName, m_pDib, JpegDlg.m_bColor, JpegDlg.m_nQuality);
	
		}
		return FALSE;
	}
	
	
	
	return CDocument::OnSaveDocument(lpszPathName);

}