将接收到的BMP图像内存数据存入CImage并显示

void threadenter()
{
  m_isClosed = false;
  CWatchDialog dlg(this);//如果要使用非模态对话框可以在DoModal之前把CButton对象地址赋值给dlg成员的CButton成员指针
  HANDLE hThread = (HANDLE)_beginthread(CRemoteClientDlg::threadEntryForWatchData, 0, this);
  //GetDlgItem(IDC_BTN_START_WATCH)->EnableWindow(FALSE);//禁用按钮,在监控对话框关闭时恢复//使用模态对话框就行
  //GetParent()->GetDlgItem(IDC_BTN_START_WATCH)->EnableWindow(TRUE);
  dlg.DoModal();
  m_isClosed = true;
  WaitForSingleObject(hThread, 500);//等待线程结束
}

void test()
{
  while (!m_isClosed) {//退出条件
    if (m_isFull == false) {//更新数据到缓存
      int ret = SendMessage(WM_SEND_PACKET, 6 << 1 | true);//子线程发送命令
      if (ret == 6) {
        BYTE* pData = (BYTE*)pClient->GetPacket().strData.c_str();
        //TODO:存入CImage
        HGLOBAL hMen = GlobalAlloc(GMEM_MOVEABLE, 0);//?创建一个描述符
        if (hMen == NULL) {
          TRACE("内存不足了!!\r\n");
          Sleep(1);
          continue;
        }
        IStream* pStream = NULL;
        HRESULT hRet = CreateStreamOnHGlobal(hMen, TRUE, &pStream);
        if (hRet == S_OK) {//创建内存成功
          ULONG length = 0;
          pStream->Write(pData, pClient->GetPacket().strData.size(), &length);
          LARGE_INTEGER bg = { 0 };
          pStream->Seek(bg, STREAM_SEEK_SET, NULL);//重新指定流指针指向
          if ((HBITMAP)m_image != NULL)
            m_image.Destroy();
          /*CImage*/m_image.Load(pStream);
          m_isFull = true;
        }
      }
      else {
        Sleep(1);
      }
    }
    else Sleep(1);
  }
}



void CWatchDialog::OnTimer(UINT_PTR nIDEvent)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  if (nIDEvent == 0) {
    CRemoteClientDlg* pParent = (CRemoteClientDlg*)GetParent();
    if (pParent->isFull()) {
      CRect rect;
      m_picture.GetWindowRect(rect);//依照当前对话框大小显示缩放
      //pParent->GetImage().BitBlt(m_picture.GetDC()->GetSafeHdc(),0,0,SRCCOPY);//直接拷贝
      if (m_nObjWidth == -1) {
        m_nObjWidth = pParent->GetImage().GetWidth();
        m_nObjHeight = pParent->GetImage().GetHeight();//获取被控端床过来图片的尺寸
      }
      pParent->GetImage().StretchBlt(/*CStatic*/m_picture.GetDC()->GetSafeHdc(), 0, 0, rect.Width(), rect.Height(), SRCCOPY);//缩放
      m_picture.InvalidateRect(NULL);//调用重绘函数
      pParent->GetImage().Destroy();
      pParent->SetImageStatus();//设置状态为空
    }
  }
  CDialogEx::OnTimer(nIDEvent);
}