www.pudn.com > BMPTest.rar > BMPTestDlg.cpp

// BMPTestDlg.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "BMPTest.h" 
#include "BMPTestDlg.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#endif 
 
 
// CAboutDlg dialog used for App About 
 
class CAboutDlg : public CDialog 
{ 
public: 
	CAboutDlg(); 
 
// Dialog Data 
	enum { IDD = IDD_ABOUTBOX }; 
 
	protected: 
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support 
 
// Implementation 
protected: 
	DECLARE_MESSAGE_MAP() 
}; 
 
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) 
{ 
} 
 
void CAboutDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
} 
 
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) 
END_MESSAGE_MAP() 
 
 
// CBMPTestDlg dialog 
 
 
 
 
CBMPTestDlg::CBMPTestDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(CBMPTestDlg::IDD, pParent) 
{ 
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 
} 
 
void CBMPTestDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
} 
 
BEGIN_MESSAGE_MAP(CBMPTestDlg, CDialog) 
	ON_WM_SYSCOMMAND() 
	ON_WM_PAINT() 
	ON_WM_QUERYDRAGICON() 
	//}}AFX_MSG_MAP 
	ON_BN_CLICKED(IDC_BUTTON1, &CBMPTestDlg::OnBnClickedButton1) 
	ON_WM_DESTROY() 
END_MESSAGE_MAP() 
 
 
// CBMPTestDlg message handlers 
 
BOOL CBMPTestDlg::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 
	m_DIBData = NULL; 
 
	return TRUE;  // return TRUE  unless you set the focus to a control 
} 
 
void CBMPTestDlg::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 CBMPTestDlg::OnPaint() 
{ 
	if (IsIconic()) 
	{ 
		CPaintDC dc(this); // device context for painting 
 
		SendMessage(WM_ICONERASEBKGND, reinterpret_cast(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(); 
	} 
 
	if(m_DIBData) 
	{ 
		CDC* pDC = this->GetDlgItem(IDC_PIC)->GetDC(); 
		CDC memDC; 
		CBitmap bmp; 
		BITMAPINFO bmpInfo; 
		RECT rect; 
		BYTE* DIBData; 
 
		if(bmiHeader.biBitCount < 24) 
			DIBData = m_DIBData + (1 << bmiHeader.biBitCount) * sizeof(RGBQUAD); 
		else 
			DIBData = m_DIBData; 
 
		memDC.CreateCompatibleDC(pDC); 
		bmp.CreateCompatibleBitmap(pDC, bmiHeader.biWidth, bmiHeader.biHeight); 
		memDC.SelectObject(&bmp); 
		bmpInfo.bmiHeader = bmiHeader; 
		::SetDIBitsToDevice(memDC.m_hDC, 0, 0, bmiHeader.biWidth,  
			bmiHeader.biHeight, 0, 0, 0, bmiHeader.biHeight,  
			DIBData, &bmpInfo, DIB_RGB_COLORS); 
		this->GetDlgItem(IDC_PIC)->GetWindowRect(&rect); 
 
		if(bmiHeader.biWidth < (rect.right - rect.left) && bmiHeader.biHeight < (rect.bottom - rect.top)) 
			pDC->BitBlt(0, 0, rect.right - rect.left, rect.bottom - rect.top, &memDC, 0, 0, SRCCOPY); 
		else{ 
			pDC->StretchBlt(0, 0, rect.right - rect.left, rect.bottom - rect.top,  
			&memDC, 0, 0, bmiHeader.biWidth, bmiHeader.biHeight, SRCCOPY); 
		} 
	} 
} 
 
// The system calls this function to obtain the cursor to display while the user drags 
//  the minimized window. 
HCURSOR CBMPTestDlg::OnQueryDragIcon() 
{ 
	return static_cast(m_hIcon); 
} 
 
 
void CBMPTestDlg::OnBnClickedButton1() 
{ 
	// TODO: Add your control notification handler code here 
	CFileDialog dlg(TRUE,NULL,NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,_T("BITMAP(*.bmp)|*.bmp|"),NULL); 
	if(dlg.DoModal() == IDOK) 
	{ 
		CFile file; 
		CString szFilePath = dlg.GetPathName(); 
 
		if (file.Open(szFilePath,CFile::modeRead | CFile::shareDenyNone,NULL) == 0) 
		{ 
			AfxMessageBox(_T("无法打开文件!")); 
			return; 
		} 
 
		file.Read(&bmfHeader, sizeof(bmfHeader)); 
 
		if (bmfHeader.bfType != 0x4d42) 
		{ 
			AfxMessageBox(_T("请重新打开一张BMP图片!")); 
			return; 
		} 
		if(file.GetLength() != bmfHeader.bfSize) 
		{ 
			AfxMessageBox(_T("文件已经损坏,请重新打开一张图片!")); 
			return; 
		} 
 
		file.Read(&bmiHeader, sizeof(bmiHeader)); 
 
		m_DIBData = new BYTE[bmfHeader.bfSize - sizeof(bmfHeader) - sizeof(bmiHeader)]; 
	 
		file.Read(m_DIBData, bmfHeader.bfSize - sizeof(bmfHeader) - sizeof(bmiHeader)); 
 
		this->RedrawWindow(); 
	} 
} 
 
void CBMPTestDlg::OnDestroy() 
{ 
	CDialog::OnDestroy(); 
 
	// TODO: Add your message handler code here 
	if(m_DIBData) 
		delete [] m_DIBData; 
}