将屏幕和MFC程序界面保存成bmp格式图片保存

╰半橙微兮° 2022-08-27 11:51 212阅读 0赞

将屏幕保存为图片，使用vs2008编译通过。  
\#include "stdafx.h"  
\#include <windows.h>  
\#include <atlimage.h>  
  
int \_\_stdcall WinMain(  
HINSTANCE hInstance,  
HINSTANCE hPrevInstance,  
LPSTR lpCmdLine,  
int nShowCmd)  
\{  
HWND hwnd = ::GetDesktopWindow();  
HDC hDC = ::GetDC(hwnd);//获取屏幕DC  
  
RECT rect;  
::GetClientRect(hwnd, &rect);//获取屏幕大小  
HDC hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC  
  
HBITMAP hBitMap = ::CreateCompatibleBitmap(hDC, rect.right, rect.bottom);//创建兼容位图  
HBITMAP hOldMap = (HBITMAP)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值  
  
::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  
  
CImage image;  
image.Attach(hBitMap);  
image.Save(\_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式  
image.Detach();  
  
::SelectObject(hDCMem, hOldMap);//选入上次的返回值  
  
//释放  
::DeleteObject(hBitMap);  
::DeleteDC(hDCMem);  
::DeleteDC(hDC);  
  
return 0;  
\}  
  
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：  
void CMainFrame::OnGetMap()  
\{  
  
HWND hwnd = this->GetSafeHwnd();  
HDC hDC = ::GetWindowDC(hwnd);//获取DC  
  
  
RECT rect;  
::GetWindowRect(hwnd, &rect);//获取屏幕大小  
HDC hDCMem = ::CreateCompatibleDC(hDC);//创建兼容DC  
  
HBITMAP hBitMap = ::CreateCompatibleBitmap(hDC, rect.right-rect.left, rect.bottom-rect.top);//创建兼容位图  
HBITMAP hOldMap = (HBITMAP)::SelectObject(hDCMem, hBitMap);//将位图选入DC，并保存返回值  
  
::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  
  
CImage image;//需要\#include <atlimage.h>  
image.Attach(hBitMap);  
image.Save(\_T("c://B.jpg"));//如果文件后缀为.bmp，则保存为为bmp格式  
image.Detach();  
  
::SelectObject(hDCMem, hOldMap);//选入上次的返回值  
  
//释放  
::DeleteObject(hBitMap);  
::DeleteDC(hDCMem);  
::DeleteDC(hDC);  
\}  
VC6.0通过，第二个：  
void CMainFrame::OnGetMap()  
\{  
  
CDC\* pDC = GetWindowDC();  
CBitmap bitmap;  
CDC memDC ;  
CRect rect;  
GetWindowRect(rect);  
memDC.CreateCompatibleDC(pDC);  
  
bitmap.CreateCompatibleBitmap(pDC,rect.Width(),rect.Height());  
memDC.SelectObject(&bitmap);  
memDC.BitBlt(0,0,rect.Width(),rect.Height(),pDC,0,0,SRCCOPY);  
  
CFileDialog fDlg(FALSE,\_T("bmp"),NULL,OFN\_HIDEREADONLY | OFN\_OVERWRITEPROMPT,\_T("位图文件|\*.bmp"),this);  
if (fDlg.DoModal()==IDOK)  
\{  
  
CString bmpfile = fDlg.GetPathName();  
  
CFile file(bmpfile,CFile::modeCreate|CFile::modeWrite);  
  
BITMAP bInfo;  
bitmap.GetBitmap(&bInfo);  
  
//计算调色板大小  
int panelsize = 0;  
if (bInfo.bmBitsPixel<24) //非真彩色  
\{  
panelsize = pow((double)2,bInfo.bmBitsPixel)\*sizeof(RGBQUAD);  
\}  
  
//定义位图信息  
BITMAPINFO\* bMapInfo = (BITMAPINFO\*)LocalAlloc(LPTR,sizeof(BITMAPINFO)+panelsize);  
bMapInfo->bmiHeader.biBitCount = bInfo.bmBitsPixel;  
bMapInfo->bmiHeader.biClrImportant = 0;  
bMapInfo->bmiHeader.biCompression = 0;  
bMapInfo->bmiHeader.biHeight = bInfo.bmHeight;  
bMapInfo->bmiHeader.biPlanes = bInfo.bmPlanes;  
bMapInfo->bmiHeader.biSize = sizeof(BITMAPINFO);  
bMapInfo->bmiHeader.biSizeImage = bInfo.bmHeight\*bInfo.bmWidthBytes;  
bMapInfo->bmiHeader.biWidth = bInfo.bmWidth;  
bMapInfo->bmiHeader.biXPelsPerMeter = 0;  
bMapInfo->bmiHeader.biYPelsPerMeter = 0;  
  
//获取位图的实际数据  
char\* pData = new char\[bMapInfo->bmiHeader.biSizeImage\];  
int len = GetDIBits(pDC->m\_hDC,bitmap,0,bInfo.bmHeight,pData,bMapInfo,DIB\_RGB\_COLORS);  
  
BITMAPFILEHEADER bFileHeader;  
bFileHeader.bfType = 0x4D42;  
bFileHeader.bfReserved1 = 0;  
bFileHeader.bfReserved2 = 0;  
bFileHeader.bfSize = sizeof(BITMAPFILEHEADER);  
bFileHeader.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+panelsize;  
  
//向文件中写入位图数据  
file.Write(&bFileHeader,sizeof(BITMAPFILEHEADER));  
file.Write(&bMapInfo->bmiHeader,sizeof(BITMAPINFOHEADER));  
file.Write(pData,bMapInfo->bmiHeader.biSizeImage+panelsize);  
file.Close();  
delete pData;  
LocalFree(bMapInfo);  
\}  
bitmap.DeleteObject();  
memDC.DeleteDC();  
  
\}