将屏幕保存为图片将当前MFC程序保存为图片 c++ vc

我不是女神ヾ 2022-08-24 05:22 249阅读 0赞

将屏幕保存为图片，使用vs2008编译通过。

**\[cpp\]** [view plain][] [copy][view plain]

1.  \#include "stdafx.h"
2.  \#include <windows.h>
3.  \#include <atlimage.h>
4.  
5.  **int** \_\_stdcall WinMain( 
6.  **HINSTANCE** hInstance, 
7.  **HINSTANCE** hPrevInstance, 
8.  **LPSTR** lpCmdLine, 
9.  **int** nShowCmd) 
10. \{ 
11. **HWND** hwnd = ::GetDesktopWindow(); 
12. **HDC** hDC = ::GetDC(hwnd);//获取屏幕DC
13. 
14.  RECT rect; 
15.  ::GetClientRect(hwnd, &rect);//获取屏幕大小
16. **HDC** hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC
17. 
18. **HBITMAP** hBitMap = ::CreateCompatibleBitmap(hDC, rect.right, rect.bottom);//创建兼容位图
19. **HBITMAP** hOldMap = (**HBITMAP**)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值
20. 
21.  ::BitBlt(hDCMem, 0, 0, rect.right, rect.bottom, hDC, 0, 0, SRCCOPY);//将屏幕DC的图象复制到内存DC中
22. 
23.  CImage image; 
24.  image.Attach(hBitMap); 
25.  image.Save(\_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式 
26.  image.Detach(); 
27. 
28.  ::SelectObject(hDCMem, hOldMap);//选入上次的返回值
29. 
30. //释放
31.  ::DeleteObject(hBitMap); 
32.  ::DeleteDC(hDCMem); 
33.  ::DeleteDC(hDC); 
34. 
35. **return** 0; 
36. \}

将当前MFC程序（这里是单文档程序）保存为图片，使用vs2005。第一个使用CImage类保存图片，第二个使用BITMAPINFO。

第一个：

**\[cpp\]** [view plain][] [copy][view plain]

1.  **void** CMainFrame::OnGetMap() 
2.  \{ 
3.  
4.  **HWND** hwnd = **this**\->GetSafeHwnd(); 
5.  **HDC** hDC = ::GetWindowDC(hwnd);//获取DC 
6.  
7.  
8.   RECT rect; 
9.   ::GetWindowRect(hwnd, &rect);//获取屏幕大小 
10. **HDC** hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC 
11. 
12. **HBITMAP** hBitMap = ::CreateCompatibleBitmap(hDC, rect.right-rect.left, rect.bottom-rect.top);//创建兼容位图 
13. **HBITMAP** hOldMap = (**HBITMAP**)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值 
14. 
15.  ::BitBlt(hDCMem, 0, 0, rect.right-rect.left, rect.bottom-rect.top, hDC, 0, 0, SRCCOPY);//将屏幕DC的图象复制到内存DC中 
16. 
17.  CImage image;//需要\#include <atlimage.h> 
18.  image.Attach(hBitMap); 
19.  image.Save(\_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式 
20.  image.Detach(); 
21. 
22.  ::SelectObject(hDCMem, hOldMap);//选入上次的返回值 
23. 
24. //释放 
25.  ::DeleteObject(hBitMap); 
26.  ::DeleteDC(hDCMem); 
27.  ::DeleteDC(hDC); 
28. \}

第二个：

**\[cpp\]** [view plain][] [copy][view plain]

1.  **void** CMainFrame::OnGetMap() 
2.  \{ 
3.  
4.   CDC\* pDC = GetWindowDC(); 
5.   CBitmap bitmap; 
6.   CDC memDC ; 
7.   CRect rect; 
8.   GetWindowRect(rect); 
9.   memDC.CreateCompatibleDC(pDC); 
10. 
11.  bitmap.CreateCompatibleBitmap(pDC,rect.Width(),rect.Height()); 
12.  memDC.SelectObject(&bitmap); 
13.  memDC.BitBlt(0,0,rect.Width(),rect.Height(),pDC,0,0,SRCCOPY); 
14. 
15.  CFileDialog fDlg(FALSE,\_T("bmp"),NULL,OFN\_HIDEREADONLY | OFN\_OVERWRITEPROMPT,\_T("位图文件|\*.bmp"),**this**); 
16. **if** (fDlg.DoModal()==IDOK) 
17.  \{ 
18. 
19.  CString bmpfile = fDlg.GetPathName(); 
20. 
21.  CFile file(bmpfile,CFile::modeCreate|CFile::modeWrite); 
22. 
23.  BITMAP bInfo; 
24.  bitmap.GetBitmap(&bInfo); 
25. 
26. //计算调色板大小
27. **int** panelsize = 0; 
28. **if** (bInfo.bmBitsPixel<24) //非真彩色
29.  \{ 
30.  panelsize = pow((**double**)2,bInfo.bmBitsPixel)\***sizeof**(RGBQUAD); 
31.  \} 
32. 
33. //定义位图信息
34.  BITMAPINFO\* bMapInfo = (BITMAPINFO\*)LocalAlloc(LPTR,**sizeof**(BITMAPINFO)+panelsize); 
35.  bMapInfo->bmiHeader.biBitCount = bInfo.bmBitsPixel; 
36.  bMapInfo->bmiHeader.biClrImportant = 0; 
37.  bMapInfo->bmiHeader.biCompression = 0; 
38.  bMapInfo->bmiHeader.biHeight = bInfo.bmHeight; 
39.  bMapInfo->bmiHeader.biPlanes = bInfo.bmPlanes; 
40.  bMapInfo->bmiHeader.biSize = **sizeof**(BITMAPINFO); 
41.  bMapInfo->bmiHeader.biSizeImage = bInfo.bmHeight\*bInfo.bmWidthBytes; 
42.  bMapInfo->bmiHeader.biWidth = bInfo.bmWidth; 
43.  bMapInfo->bmiHeader.biXPelsPerMeter = 0; 
44.  bMapInfo->bmiHeader.biYPelsPerMeter = 0; 
45. 
46. //获取位图的实际数据
47. **char**\* pData = **new****char**\[bMapInfo->bmiHeader.biSizeImage\]; 
48. **int** len = GetDIBits(pDC->m\_hDC,bitmap,0,bInfo.bmHeight,pData,bMapInfo,DIB\_RGB\_COLORS); 
49. 
50.  BITMAPFILEHEADER bFileHeader; 
51.  bFileHeader.bfType = 0x4D42; 
52.  bFileHeader.bfReserved1 = 0; 
53.  bFileHeader.bfReserved2 = 0; 
54.  bFileHeader.bfSize = **sizeof**(BITMAPFILEHEADER); 
55.  bFileHeader.bfOffBits = **sizeof**(BITMAPFILEHEADER)+**sizeof**(BITMAPINFOHEADER)+panelsize; 
56. 
57. //向文件中写入位图数据
58.  file.Write(&bFileHeader,**sizeof**(BITMAPFILEHEADER)); 
59.  file.Write(&bMapInfo->bmiHeader,**sizeof**(BITMAPINFOHEADER)); 
60.  file.Write(pData,bMapInfo->bmiHeader.biSizeImage+panelsize); 
61.  file.Close(); 
62. **delete** pData; 
63.  LocalFree(bMapInfo); 
64.  \} 
65.  bitmap.DeleteObject(); 
66.  memDC.DeleteDC(); 
67. 
68. \}

[view plain]: http://blog.csdn.net/hityct1/article/details/3918305#