www.pudn.com > remoteControl.zip > getimageDlg.cpp

// getimageDlg.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "getimage.h" 
#include "getimageDlg.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CGetimageDlg dialog 
 
CGetimageDlg::CGetimageDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(CGetimageDlg::IDD, pParent) 
{ 
	//{{AFX_DATA_INIT(CGetimageDlg) 
		// 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 CGetimageDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CGetimageDlg) 
	DDX_Control(pDX, IDC_PIC, m_Pic); 
	//}}AFX_DATA_MAP 
} 
 
BEGIN_MESSAGE_MAP(CGetimageDlg, CDialog) 
	//{{AFX_MSG_MAP(CGetimageDlg) 
	ON_WM_PAINT() 
	ON_WM_QUERYDRAGICON() 
	ON_BN_CLICKED(IDC_GET, OnGet) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CGetimageDlg message handlers 
 
BOOL CGetimageDlg::OnInitDialog() 
{ 
	CDialog::OnInitDialog(); 
 
	// 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 
} 
 
// 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 CGetimageDlg::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 CGetimageDlg::OnQueryDragIcon() 
{ 
	return (HCURSOR) m_hIcon; 
} 
 
//把选定的屏幕区域拷贝到位图中的函数 
 
//lprect 代表选定区域 
HBITMAP CGetimageDlg::Copybitmap(LPRECT lprect) 
{ 
	HDC hscrdc, hmemdc;  
	// 屏幕和内存设备描述表 
	HBITMAP hbitmap, holdbitmap;  
	// 位图句柄 
	int nx, ny, nx2, ny2;  
	// 选定区域坐标 
	int nwidth, nheight;  
	// 位图宽度和高度 
	int xscrn, yscrn;  
	// 屏幕分辨率 
 
	// 确保选定区域不为空矩形 
	if (IsRectEmpty(lprect)) 
		return NULL; 
 
	//为屏幕创建设备描述表 
	hscrdc = CreateDC("display", NULL, NULL, NULL); 
	//为屏幕设备描述表创建兼容的内存设备描述表 
	hmemdc = CreateCompatibleDC(hscrdc); 
	// 获得选定区域坐标 
	nx = lprect->left; 
	ny = lprect->top; 
	nx2 = lprect->right; 
	ny2 = lprect->bottom; 
	// 获得屏幕分辨率 
	xscrn = GetDeviceCaps(hscrdc, HORZRES); 
	yscrn = GetDeviceCaps(hscrdc, VERTRES); 
	//确保选定区域是可见的 
	if (nx < 0) 
		nx = 0; 
	if (ny < 0) 
		ny = 0; 
	if (nx2 > xscrn) 
		nx2 = xscrn; 
	if (ny2 > yscrn) 
		ny2 = yscrn; 
 
	nwidth = nx2 - nx; 
	nheight = ny2 - ny; 
 
	// 创建一个与屏幕设备描述表兼容的位图 
	hbitmap = CreateCompatibleBitmap(hscrdc, nwidth, nheight); 
 
	// 把新位图选到内存设备描述表中 
	holdbitmap = (HBITMAP)SelectObject(hmemdc, hbitmap); 
	// 把屏幕设备描述表拷贝到内存设备描述表中 
	BitBlt(hmemdc, 0, 0, nwidth, nheight,hscrdc, nx, ny, SRCCOPY); 
	//得到屏幕位图的句柄 
	hbitmap = (HBITMAP)SelectObject(hmemdc, holdbitmap); 
	 
	//清除  
	DeleteDC(hscrdc); 
	DeleteDC(hmemdc); 
	 
	// 返回位图句柄 
	return hbitmap; 
}	 
 
 
//把屏幕内容粘贴到剪贴板上 
void CGetimageDlg::Toclip(HBITMAP hbitmap) 
{ 
	 
	if (::OpenClipboard(m_hWnd)) //hwnd为程序窗口句柄 
	{ 
		//清空剪贴板 
		EmptyClipboard(); 
		//把屏幕内容粘贴到剪贴板上，hbitmap 为刚才的屏幕位图句柄 
		SetClipboardData(CF_BITMAP, hbitmap); 
		//关闭剪贴板 
		CloseClipboard(); 
	} 
} 
 
 
//把屏幕内容以位图格式存到磁盘文件上 
//lpfilename 为位图文件名，hbitmap 为刚才的屏幕位图句柄 
int CGetimageDlg::Tofile(HBITMAP hbitmap , LPSTR lpfilename) 
{  
	HDC hdc; //设备描述表 
		int ibits;  
	WORD wbitcount; 	//当前显示分辨率下每个像素所占字节数 
	 
		//位图中每个像素所占字节数，定义调色板大小，位图中像素字节大小，位图文件大小 ，写入文件字节数 
	DWORD dwpalettesize=0, dwbmbitssize, dwdibsize, dwwritten; 
 
	BITMAP bitmap; //位图属性结构 
	BITMAPFILEHEADER bmfhdr; //位图文件头结构 
	BITMAPINFOHEADER bi; //位图信息头结构 
	LPBITMAPINFOHEADER lpbi; //指向位图信息头结构 
	 
		//定义文件，分配内存句柄，调色板句柄 
	HANDLE fh, hdib, hpal,holdpal=NULL; 
	 
		//计算位图文件每个像素所占字节数 
	hdc = CreateDC("display",NULL,NULL,NULL); 
	ibits = GetDeviceCaps(hdc, BITSPIXEL) * GetDeviceCaps(hdc, PLANES); 
	DeleteDC(hdc); 
 
		if (ibits <= 1) 
			wbitcount = 1; 
	else if (ibits <= 4) 
			wbitcount = 4; 
	else if (ibits <= 8) 
			wbitcount = 8; 
	else if (ibits <= 16) 
			wbitcount = 16; 
	else if (ibits <= 24) 
			wbitcount = 24; 
	else  
			wbitcount = 32; 
 
	//计算调色板大小 
		if (wbitcount <= 8) 
			dwpalettesize = (1 << wbitcount) * sizeof(RGBQUAD); 
 
	//设置位图信息头结构 
	GetObject(hbitmap, sizeof(BITMAP), (LPSTR)&bitmap); 
	bi.biSize = sizeof(BITMAPINFOHEADER); 
		bi.biWidth = bitmap.bmWidth; 
	bi.biHeight = bitmap.bmHeight; 
	bi.biPlanes = 1; 
	bi.biBitCount = wbitcount; 
	bi.biCompression = BI_RGB; 
	bi.biSizeImage = 0; 
	bi.biXPelsPerMeter = 0; 
	bi.biYPelsPerMeter = 0; 
	bi.biClrUsed = 0; 
	bi.biClrImportant = 0; 
 
		dwbmbitssize = ((bitmap.bmWidth * wbitcount+31)/32)* 4 * bitmap.bmHeight ; 
	//为位图内容分配内存 
		hdib = GlobalAlloc(GHND,dwbmbitssize + dwpalettesize +  
sizeof(BITMAPINFOHEADER)); 
	lpbi = (LPBITMAPINFOHEADER)GlobalLock(hdib); 
		*lpbi = bi; 
	 
	// 处理调色板  
		hpal = GetStockObject(DEFAULT_PALETTE); 
	if (hpal) 
		{ 
			hdc = ::GetDC(NULL); 
		holdpal = SelectPalette(hdc, (HPALETTE)hpal, false); 
			RealizePalette(hdc); 
	} 
	 
		// 获取该调色板下新的像素值 
	GetDIBits(hdc, hbitmap, 0, (UINT) bitmap.bmHeight,(LPSTR)lpbi +  
sizeof(BITMAPINFOHEADER)+dwpalettesize,(BITMAPINFO*)lpbi, DIB_RGB_COLORS); 
	 
	//恢复调色板  
		if (holdpal) 
		{ 
			SelectPalette(hdc, (HPALETTE)holdpal, true); 
		RealizePalette(hdc); 
			::ReleaseDC(NULL, hdc); 
	} 
 
	//创建位图文件  
		fh = CreateFile(lpfilename, GENERIC_WRITE, 0, NULL, 
 			CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL| 
FILE_FLAG_SEQUENTIAL_SCAN, NULL); 
	if (fh == INVALID_HANDLE_VALUE) 
			return false; 
	 
	// 设置位图文件头 
	bmfhdr.bfType = 0x4d42; // "bm" 
		dwdibsize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER)+  
dwpalettesize + dwbmbitssize;  
	bmfhdr.bfSize = dwdibsize; 
	bmfhdr.bfReserved1 = 0; 
	bmfhdr.bfReserved2 = 0; 
	bmfhdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) +  
(DWORD)sizeof(BITMAPINFOHEADER)+ dwpalettesize; 
 
	// 写入位图文件头 
		WriteFile(fh, (LPSTR)&bmfhdr, sizeof(BITMAPFILEHEADER), &dwwritten, NULL); 
	 
	// 写入位图文件其余内容 
		WriteFile(fh, (LPSTR)lpbi, dwdibsize, &dwwritten, NULL); 
	//清除  
		GlobalUnlock(hdib); 
	GlobalFree(hdib); 
		CloseHandle(fh); 
	return true; 
} 
 
 
/* 
 
 
 
//把屏幕内容以位图格式存到磁盘文件上 
//lpfilename 为位图文件名，hbitmap 为刚才的屏幕位图句柄 
int CGetimageDlg::Tofile(HBITMAP hbitmap , LPSTR lpfilename) 
{  
	HDC hdc; //设备描述表 
	int ibits;  
	WORD wbitcount; 	//当前显示分辨率下每个像素所占字节数 
	 
	//位图中每个像素所占字节数，定义调色板大小，位图中像素字节大小，位图文件大小 ，写入文件字节数 
	DWORD dwpalettesize=0, dwbmbitssize, dwdibsize, dwwritten; 
 
	BITMAP bitmap; //位图属性结构 
	BITMAPFILEHEADER bmfhdr; //位图文件头结构 
	BITMAPINFOHEADER bi; //位图信息头结构 
	LPBITMAPINFOHEADER lpbi; //指向位图信息头结构 
 
	//定义文件，分配内存句柄，调色板句柄 
	HANDLE fh, hdib, hpal,holdpal=NULL; 
	 
 
	//计算位图文件每个像素所占字节数 
	hdc = CreateDC("display",NULL,NULL,NULL); 
	ibits = GetDeviceCaps(hdc, BITSPIXEL) * GetDeviceCaps(hdc, PLANES); 
	DeleteDC(hdc); 
 
	if (ibits <= 1) 
		wbitcount = 1; 
	else if (ibits <= 4) 
		wbitcount = 4; 
	else if (ibits <= 8) 
		wbitcount = 8; 
	else if (ibits <= 16) 
		wbitcount = 16; 
	else if (ibits <= 24) 
		wbitcount = 24; 
	else  
		wbitcount = 32; 
 
	//计算调色板大小 
	if (wbitcount <= 8) 
		dwpalettesize = (1 << wbitcount) * sizeof(RGBQUAD); 
 
	//设置位图信息头结构 
	GetObject(hbitmap, sizeof(BITMAP), (LPSTR)&bitmap); 
	bi.biSize = sizeof(LPBITMAPINFOHEADER); 
	bi.biWidth = bitmap.bmWidth; 
	bi.biHeight = bitmap.bmHeight; 
	bi.biPlanes = 1; 
	bi.biBitCount = wbitcount; 
	bi.biCompression = BI_RGB; 
	bi.biSizeImage = 0; 
	bi.biXPelsPerMeter = 0; 
	bi.biYPelsPerMeter = 0; 
	bi.biClrUsed = 0; 
	bi.biClrImportant = 0; 
 
	dwbmbitssize = ((bitmap.bmWidth * wbitcount+31)/32)* 4 * bitmap.bmHeight ; 
	//为位图内容分配内存 
	hdib = GlobalAlloc(GHND,dwbmbitssize + dwpalettesize + sizeof(BITMAPINFOHEADER)); 
	lpbi = (LPBITMAPINFOHEADER)GlobalLock(hdib); 
	*lpbi = bi; 
	 
	// 处理调色板  
	hpal = GetStockObject(DEFAULT_PALETTE); 
	if (hpal) 
	{ 
		hdc = ::GetDC(NULL); 
		holdpal = SelectPalette(hdc, (HPALETTE)hpal, false); 
		RealizePalette(hdc); 
	} 
	 
	// 获取该调色板下新的像素值 
	GetDIBits(hdc, hbitmap, 0, (UINT) bitmap.bmHeight,(LPSTR)lpbi +  
		sizeof(BITMAPINFOHEADER)+dwpalettesize,(BITMAPINFO*)lpbi, DIB_RGB_COLORS); 
	 
	//恢复调色板  
	if (holdpal) 
	{ 
		SelectPalette(hdc, (HPALETTE)holdpal, true); 
		RealizePalette(hdc); 
		::ReleaseDC(NULL, hdc); 
	} 
 
	//创建位图文件  
	fh = CreateFile(lpfilename, GENERIC_WRITE, 0, NULL,  
		CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_SEQUENTIAL_SCAN, NULL); 
	if (fh == INVALID_HANDLE_VALUE) 
		return false; 
	 
	// 设置位图文件头 
	bmfhdr.bfType = 0x4d42; // "bm" 
	dwdibsize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER)+ dwpalettesize + dwbmbitssize;  
	bmfhdr.bfSize = dwdibsize; 
	bmfhdr.bfReserved1 = 0; 
	bmfhdr.bfReserved2 = 0; 
	bmfhdr.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER)+ dwpalettesize; 
 
	// 写入位图文件头 
	WriteFile(fh, (LPSTR)&bmfhdr, sizeof(BITMAPFILEHEADER), &dwwritten, NULL); 
	 
	// 写入位图文件其余内容 
	WriteFile(fh, (LPSTR)lpbi, dwdibsize, &dwwritten, NULL); 
	//清除  
	GlobalUnlock(hdib); 
	GlobalFree(hdib); 
	CloseHandle(fh); 
	return true; 
} 
*/ 
 
void CGetimageDlg::OnGet()  
{ 
	// TODO: Add your control notification handler code here 
	LPRECT temprect; 
	HBITMAP tempmap; 
 
	//假设要截图的区域为(0,0)至(300,400)，具体实践中可由用户选择 
	temprect = new RECT(); 
	temprect->bottom = 300; 
	temprect->left = 0; 
	temprect->right = 400; 
	temprect->top = 0; 
 
	tempmap = Copybitmap(temprect); 
	 
	//拷贝到剪贴板 
	Toclip(tempmap); 
 
	//显示获取的屏幕 
	m_Pic.SetBitmap(tempmap); 
 
	//生成文件保存在C盘根目录下 
	Tofile(tempmap,"c:\\temp.bmp"); 
 
	delete temprect; 
}