www.pudn.com > screencapture.rar > testbmpcpDlg.cpp
// testbmpcpDlg.cpp : implementation file
//
#include "stdafx.h"
#include "testbmpcp.h"
#include "testbmpcpDlg.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()
/////////////////////////////////////////////////////////////////////////////
// CTestbmpcpDlg dialog
CTestbmpcpDlg::CTestbmpcpDlg(CWnd* pParent /*=NULL*/)
: CDialog(CTestbmpcpDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CTestbmpcpDlg)
m_filename = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CTestbmpcpDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CTestbmpcpDlg)
DDX_Control(pDX, IDC_SCROLLBAR2, m_vbar);
DDX_Control(pDX, IDC_SCROLLBAR1, m_hbar);
DDX_Text(pDX, IDC_EDIT1, m_filename);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CTestbmpcpDlg, CDialog)
//{{AFX_MSG_MAP(CTestbmpcpDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
ON_WM_VSCROLL()
ON_WM_HSCROLL()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CTestbmpcpDlg message handlers
BOOL CTestbmpcpDlg::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
scrx=0;
scry=0;
scrxlm=100;
scrylm=100;
capflag=0;
// TODO: Add extra initialization here
return TRUE; // return TRUE unless you set the focus to a control
}
void CTestbmpcpDlg::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 CTestbmpcpDlg::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 CTestbmpcpDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CTestbmpcpDlg::OnButton1()
{
// TODO: Add your control notification handler code here
HWND hWnd = ::GetDesktopWindow();//获得屏幕的HWND.
HDC hScreenDC = ::GetDC(hWnd); //获得屏幕的HDC.
HDC MemDC = ::CreateCompatibleDC(hScreenDC);
RECT rect;
::GetWindowRect(hWnd,&rect);
SIZE screensize;
screensize.cx=rect.right-rect.left;
screensize.cy=rect.bottom-rect.top;
hBitmap = ::CreateCompatibleBitmap(hScreenDC,screensize.cx,screensize.cy);
HGDIOBJ hOldBMP = ::SelectObject(MemDC,hBitmap);
::BitBlt(MemDC,0,0,screensize.cx,screensize.cy,hScreenDC,rect.left,rect.top,SRCCOPY);
::SelectObject(MemDC,hOldBMP);
::DeleteObject(MemDC);
::ReleaseDC(hWnd,hScreenDC);
CDC *pDC=GetDC();
HDC dDlgDC=pDC->m_hDC;
HDC MemDC1 = CreateCompatibleDC(dDlgDC);
HGDIOBJ hOldBMP1 = ::SelectObject(MemDC1,hBitmap);
::StretchBlt(dDlgDC,0,0,600,400,MemDC1,0,0,screensize.cx,screensize.cy,SRCCOPY);
::SelectObject(MemDC1,hOldBMP1);
::DeleteObject(MemDC1);
::ReleaseDC(m_hWnd,dDlgDC);
scrylm=screensize.cy-500;
scrxlm=screensize.cx-700;
m_vbar.SetScrollRange(0,screensize.cy-500,TRUE);
m_vbar.SetScrollPos(0,TRUE);
m_hbar.SetScrollRange(0,screensize.cx-700,TRUE);
m_hbar.SetScrollPos(0,TRUE);
capflag=1;
}
void CTestbmpcpDlg::WriteBmpToFile(HBITMAP hBitmap,CString strFileName)
{
HDC hDC =::CreateDC("DISPLAY",NULL,NULL,NULL);
int iBits = ::GetDeviceCaps(hDC, BITSPIXEL) * ::GetDeviceCaps(hDC, PLANES);//当前分辨率下每个像素所占字节数
::DeleteDC(hDC);
WORD wBitCount; //位图中每个像素所占字节数
if (iBits <= 1)
wBitCount = 1;
else if (iBits <= 4)
wBitCount = 4;
else if (iBits <= 8)
wBitCount = 8;
else if (iBits <= 24)
wBitCount = 24;
else
wBitCount = iBits;
DWORD dwPaletteSize=0; //调色板大小， 位图中像素字节大小
if (wBitCount <= 8)
dwPaletteSize = (1 << wBitCount) * sizeof(RGBQUAD);
BITMAP bm; //位图属性结构
::GetObject(hBitmap, sizeof(bm), (LPSTR)&bm);
BITMAPINFOHEADER bi,bi1; //位图信息头结构
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = bm.bmWidth;
bi.biHeight = bm.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = wBitCount;
bi.biCompression = BI_RGB; //BI_RGB表示位图没有压缩
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
bi1=bi;
bi1.biBitCount=24;
DWORD dwBmBitsSize = ((bm.bmWidth * wBitCount+31)/32) * 4 * bm.bmHeight;
HANDLE hDib = ::GlobalAlloc(GHND,dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER)); //为位图内容分配内存
LPBITMAPINFOHEADER lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDib);
*lpbi = bi;
HANDLE hPal = ::GetStockObject(DEFAULT_PALETTE); // 处理调色板
HANDLE hOldPal=NULL;
if (hPal)
{
hDC = ::GetDC(NULL);
hOldPal = SelectPalette(hDC,(HPALETTE)hPal, FALSE);
RealizePalette(hDC);
}
int nOutputBytes = 0;
unsigned char *pJpp,*m_pDibBits;
pJpp = new unsigned char [dwBmBitsSize];
m_pDibBits = new unsigned char [dwBmBitsSize];
//::GetDIBits(hDC, hBitmap, 0, (UINT) bm.bmHeight,m_pDibBits,(BITMAPINFO*)lpbi,DIB_RGB_COLORS);
::GetDIBits(hDC, hBitmap, 0, (UINT) bm.bmHeight,(LPSTR)lpbi + sizeof(BITMAPINFOHEADER)+dwPaletteSize,(BITMAPINFO*)lpbi,DIB_RGB_COLORS);// 获取该调色板下新的像素值
if (hOldPal)//恢复调色板
{
SelectPalette(hDC, (HPALETTE)hOldPal, TRUE);
RealizePalette(hDC);
::ReleaseDC(NULL, hDC);
}
/* memcpy(m_pDibBits,(LPSTR)lpbi+sizeof(BITMAPINFOHEADER)+dwPaletteSize,dwBmBitsSize);
int i=0,j=0;
for(j=0;jscrylm)
scry=scrylm;
nPos1+=10;
drawbitmap();
}
if(nSBCode==SB_LINEUP)
{
scry=scry-10;
if(scry<0)
scry=0;
if(nPos1>10)
nPos1-=10;
drawbitmap();
}
if(nSBCode==SB_THUMBTRACK)
{
scry=nPos;
nPos1=nPos;
if(nPos1>scrylm)
nPos1=scrylm;
if(scry<0)
scry=0;
if(scry>scrylm)
scry=scrylm;
drawbitmap();
}
m_vbar.SetScrollPos(nPos1);
CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}
void CTestbmpcpDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
// TODO: Add your message handler code here and/or call default
int nPos1=m_hbar.GetScrollPos();
if(nSBCode==SB_LINERIGHT)
{
scrx=scrx+10;
if(scrx>scrxlm)
scrx=scrxlm;
nPos1+=10;
drawbitmap();
}
if(nSBCode==SB_LINELEFT)
{
scrx=scrx-10;
if(scrx<0)
scrx=0;
if(nPos1>10)
nPos1-=10;
drawbitmap();
}
if(nSBCode==SB_THUMBTRACK)
{
scrx=nPos;
nPos1=nPos;
if(nPos1>scrxlm)
nPos1=scrxlm;
if(scrx<0)
scrx=0;
if(scrx>scrxlm)
scrx=scrxlm;
drawbitmap();
}
m_hbar.SetScrollPos(nPos1,TRUE);
CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}
void CTestbmpcpDlg::drawbitmap()
{
if(capflag==0)
return;
CDC *pDC=GetDC();
HDC dDlgDC=pDC->m_hDC;
HDC MemDC1 = CreateCompatibleDC(dDlgDC);
HGDIOBJ hOldBMP1 = ::SelectObject(MemDC1,hBitmap);
::StretchBlt(dDlgDC,0,0,700,500,MemDC1,scrx,scry,700,500,SRCCOPY);
::SelectObject(MemDC1,hOldBMP1);
::DeleteObject(MemDC1);
::ReleaseDC(m_hWnd,dDlgDC);
}