ex_bmpdlg.cpp

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// Ex_BMPDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex_BMP.h"
#include "Ex_BMPDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CEx_BMPDlg dialog

CEx_BMPDlg::CEx_BMPDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEx_BMPDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEx_BMPDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEx_BMPDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx_BMPDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEx_BMPDlg, CDialog)
	//{{AFX_MSG_MAP(CEx_BMPDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_IMAGE_OPEN, OnImageOpen)
	ON_BN_CLICKED(IDC_IMAGE_SHARP, OnImageSharp)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx_BMPDlg message handlers

BOOL CEx_BMPDlg::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_hBitmap = 0;

	GetDlgItem(IDC_IMAGE_SHARP)->EnableWindow( FALSE ); // 使[锐化]按钮无效

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEx_BMPDlg::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 CEx_BMPDlg::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();
		CWnd* pWnd = GetDlgItem(IDC_DRAW);
		pWnd->UpdateWindow();
		DrawPhoto();
	}
}

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

void CEx_BMPDlg::DrawPhoto()
{
	if(!m_hBitmap) return;	 
	CBitmap m_bmp;
    m_bmp.Attach(m_hBitmap); 
	BITMAP bm;						// 定义一个BITMAP结构变量，以便获取位图参数
	m_bmp.GetObject(sizeof(BITMAP),&bm);

	float fScale;	// 高/宽
	fScale = (float)bm.bmHeight / (float)bm.bmWidth;
	
	CWnd* pWnd = GetDlgItem(IDC_DRAW);	// 获得IDC_DRAW控件窗口指针
	CDC* pDC = pWnd->GetDC();			// 获得窗口当前的设备环境指针

	// 调整可以显示的矩形大小
	CRect rcClient;

	int nWidth, nHeight, nX = 0, nY = 0;
	pWnd->GetClientRect( rcClient );
	nWidth = rcClient.Width();
	nHeight = (int)((float)nWidth * fScale);
	nX = 0;
	nY = ( rcClient.Height() - nHeight ) / 2;
	if ( nHeight > rcClient.Height() )
	{
		nHeight = rcClient.Height();
		nWidth = (int)((float)nHeight/fScale);
		nX = ( rcClient.Width() - nWidth )/2;
		nY = 0;
	}

	CDC dcMem;						// 定义并创建一个内存设备环境
	dcMem.CreateCompatibleDC(pDC);
	CBitmap *pOldbmp = dcMem.SelectObject(&m_bmp); 	// 将位图选入内存设备环境中

	rcClient.DeflateRect(-1, -1);
	pDC->Rectangle( rcClient );
	pDC->StretchBlt(nX, nY, nWidth, nHeight, 
		&dcMem,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
									// 将位图复制到实际的设备环境中
	dcMem.SelectObject(pOldbmp);	// 恢复原来的内存设备环境
}

void CEx_BMPDlg::OnImageOpen() 
{
	static char BASED_CODE szFilter[] = "图片文件(*.bmp)|*.bmp||";
	CFileDialog dlg( TRUE,NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szFilter);
	if (IDOK != dlg.DoModal()) return;
	m_hBitmap = (HBITMAP)::LoadImage(AfxGetInstanceHandle(),
		dlg.GetPathName(),IMAGE_BITMAP, 0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION); 
	// 将外部BMP文件调入并返回HBITMAP句柄
	GetDlgItem(IDC_IMAGE_SHARP)->EnableWindow( TRUE ); // 使[锐化]按钮有效
	Invalidate();	// 强迫对话框窗口无效	
}

void CEx_BMPDlg::OnImageSharp() 
{
	int sharpLaplacian[9] = {-1,-1,-1,-1,9,-1,-1,-1,-1};	// 拉普拉斯模板

	CWnd* pWnd = GetDlgItem(IDC_DRAW);	// 获得IDC_DRAW控件窗口指针
	CDC* pDC = pWnd->GetDC();			// 获得窗口当前的设备环境指针
	pWnd->UpdateWindow();

	CRect rcClient;
	pWnd->GetClientRect( rcClient );

	int nWidth	= rcClient.Width();
 	int nHeight	= rcClient.Height();

	COLORREF bkPixel[400][300];		// 根据实际大小设置数组大小
	// 备份原来的图像数据
	for (int bi=0; bi<nWidth; bi++)
		for (int bj=0; bj<nHeight; bj++)
			bkPixel[bi][bj] = pDC->GetPixel(bi,bj);
	int i,j;
	for (i = 1; i < nWidth-1; i++) {
		for (j = 1; j < nHeight-1; j++){
			
			int rr = 0, gg = 0, bb = 0, index = 0;

			for (int col=-1;col<=1;col++) {
				for (int row=-1;row<=1;row++){
					COLORREF clr = bkPixel[i+row][j+col];
					rr += GetRValue(clr)*sharpLaplacian[index];
					gg += GetGValue(clr)*sharpLaplacian[index];
					bb += GetBValue(clr)*sharpLaplacian[index];
					index++;
				}
			}
 			//处理溢出点
			if (rr>255) rr = 255; else if (rr<0) rr = -rr;
			if (gg>255) gg = 255; else if (gg<0) gg = -gg;
			if (bb>255) bb = 255; else if (bb<0) bb = -bb;
			
			pDC->SetPixelV(i,j,RGB(rr,gg,bb));
		}
	}
}