convertdlg.cpp

利用浏览器隐藏图片 运行环境：XPSP2+IE6.0和TT；VC++ 6.0 注意事项：工程压缩包中的convertReleaseconvert.exe是示例程序。 在这个目录中有两个BMP

// convertDlg.cpp : implementation file
//

#include "stdafx.h"
#include "convert.h"
#include "convertDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CConvertDlg dialog

CConvertDlg::CConvertDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CConvertDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CConvertDlg)
	m_strOutName = _T("");
	m_strFrom2Name = _T("");
	m_strFrom1Name = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CConvertDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CConvertDlg)
	DDX_Text(pDX, IDC_EDIT3, m_strOutName);
	DDX_Text(pDX, IDC_EDIT2, m_strFrom2Name);
	DDX_Text(pDX, IDC_EDIT1, m_strFrom1Name);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CConvertDlg, CDialog)
	//{{AFX_MSG_MAP(CConvertDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CConvertDlg message handlers

BOOL CConvertDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CConvertDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CConvertDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CConvertDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CConvertDlg::OnOK() 
{
	BITMAPFILEHEADER head1,head2,head3;
	BITMAPINFOHEADER info1,info2,info3;
	TCHAR *pBuffer1,*pBuffer2,*pTemp;
	CFile fileFrom1,fileFrom2,fileOut;
	DWORD dwFrom1Length,dwFrom2Length,dwLength,dwHeight,dwWidth,dwSeek,dwCount=1;

	if (!fileFrom1.Open(m_strFrom2Name,CFile::modeRead))
	{
		MessageBox("打开要隐藏显示的BMP位图文件失败!");
		return;
	}

	
	if(!fileFrom2.Open(m_strFrom1Name,CFile::modeRead))
	{
		MessageBox("打开要正常显示的BMP位图文件失败!");
		return;
	}

	if(!fileOut.Open(m_strOutName,CFile::modeCreate|CFile::modeWrite))
	{
		MessageBox("创建输出文件失败");
		return;
	}

	//获得来源BMP位图文件的格式信息
	fileFrom1.ReadHuge(&head1,sizeof(head1));
	fileFrom2.ReadHuge(&head2,sizeof(head2));
	fileFrom1.ReadHuge(&info1,sizeof(info1));
	fileFrom2.ReadHuge(&info2,sizeof(info2));
	if(info1.biBitCount<16||info2.biBitCount<16||info1.biBitCount!=info2.biBitCount)
	{
		MessageBox("BMP位图文件的色彩不正确");
		return;
	}


	//计算BMP位图文件每一行数据需要多大的缓存空间
	dwFrom1Length=((info1.biWidth*(info1.biBitCount/8)+7)/8)*8;
	dwFrom2Length=((info2.biWidth*(info2.biBitCount/8)+7)/8)*8;
	dwSeek=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);

	//如果来源的两个BMP文件的长、宽属性不一致，统一以最小的长宽数据为标准进行处理
	if(info1.biWidth<info2.biWidth)dwWidth=info1.biWidth;
	else dwWidth=info2.biWidth;
	
	if(info1.biHeight<info2.biHeight)dwHeight=info1.biHeight;
	else dwHeight=info2.biHeight;
	head3=head1;
	info3=info1;
	info3.biWidth=dwWidth;
	info3.biHeight=dwHeight;
	//最后生成的BMP位图文件每一行数据需要多大的缓存空间
	dwLength=(dwWidth*(info3.biBitCount/8)+7)/8*8;


	pBuffer1=new TCHAR[dwFrom1Length];
	pBuffer2=new TCHAR[dwFrom2Length];
	pTemp=new TCHAR[dwLength];

	//写生成的BMP位图文件头
	fileOut.WriteHuge(&head3,sizeof(head3));
	fileOut.WriteHuge(&info3,sizeof(info3));

	for(int i=dwHeight-1;i>0;i--)
	{
		//读两个源BMP位图文件的每一行数据
		fileFrom1.Seek(dwFrom1Length*i+dwSeek,CFile::begin);
		fileFrom2.Seek(dwFrom2Length*i+dwSeek,CFile::begin);

		fileFrom1.ReadHuge(pBuffer1,dwFrom1Length);
		fileFrom2.ReadHuge(pBuffer2,dwFrom2Length);

		if(dwCount%2)
		{
			for(int j=0;j<dwWidth;j++)
			{
				if(j%2)memcpy(pTemp+j*(info3.biBitCount/8),pBuffer1+j*(info1.biBitCount/8),info1.biBitCount/8);
				else memcpy(pTemp+j*(info3.biBitCount/8),pBuffer2+j*(info2.biBitCount/8),info2.biBitCount/8);
			}
		}
		else
		{
				for(int j=0;j<dwWidth;j++)
			{
				if(j%2)memcpy(pTemp+j*(info3.biBitCount/8),pBuffer2+j*(info2.biBitCount/8),info2.biBitCount/8);
				else memcpy(pTemp+j*(info3.biBitCount/8),pBuffer1+j*(info1.biBitCount/8),info1.biBitCount/8);
			}				
		}


		dwCount++;
		//写入数据
		fileOut.Seek(dwLength*i+dwSeek,CFile::begin);
		fileOut.WriteHuge(pTemp,dwLength);
	}
	delete[] pTemp;
	delete[] pBuffer1;
	delete[] pBuffer2;
	
	//关闭文件
	fileFrom1.Close();
	fileFrom2.Close();
	fileOut.Close();

	MessageBox("OK",NULL,MB_OK);
}

void CConvertDlg::OnButton1() 
{
	UpdateData(TRUE);
	CFileDialog file(TRUE);
	file.m_ofn.Flags|=OFN_EXPLORER;
	file.m_ofn.lpstrFilter="BMP文件(*.BMP)\0*.BMP";
	if(file.DoModal()==IDOK)
	{
		m_strFrom1Name=file.GetPathName();
		m_strFrom1Name.MakeUpper();
		UpdateData(FALSE);
	}
}

void CConvertDlg::OnButton2() 
{
	UpdateData(TRUE);
	CFileDialog file(TRUE);
	file.m_ofn.Flags|=OFN_EXPLORER;
	file.m_ofn.lpstrFilter="BMP文件(*.BMP)\0*.BMP";
	if(file.DoModal()==IDOK)
	{
		m_strFrom2Name=file.GetPathName();
		m_strFrom2Name.MakeUpper();
		UpdateData(FALSE);
	}
	
}

void CConvertDlg::OnButton3() 
{
	UpdateData(TRUE);
	CFileDialog file(FALSE);
	file.m_ofn.Flags|=OFN_EXPLORER;
	file.m_ofn.lpstrFilter="BMP文件(*.BMP)\0*.BMP";
	if(file.DoModal()==IDOK)
	{
		m_strOutName=file.GetPathName();
		m_strOutName.MakeUpper();
		if(m_strOutName.Right(4).Compare(".BMP")!=0)m_strOutName+=".BMP";
		UpdateData(FALSE);
	}
	
}