把MFC程序保存为图片 vc ++

 在单文档中可以把客户区的内容保存成一张BMP格式图片。

 

代码如下：

 

void CCBilinearView::OnFileSave() {CDC* pDC = GetWindowDC(); CBitmap bitmap; CDC memDC ; CRect rect; GetClientRect(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(); }