opencv CxImage 互转 (Mat)

//to Mat
  CxImage img;
  img.Load("C:\\f.jpg");
  uint8_t* buf=NULL;
  int32_t len=0;
  bool rs =img.Encode(buf,len,CXIMAGE_FORMAT_BMP);
  cv::Mat temp2;
  vector<uchar> buff2; 
  buff2.resize(len);
  memcpy(&buff2[0],buf,len);
  temp2= cv::imdecode(buff2,1); 
  cv::imshow("111",temp2);
  cv::waitKey();

  //to Cximage
  vector<uchar> buff; 
  cv::imencode(".bmp" ,temp2,buff); 
  CxImage img2(&buff[0],buff.size(),CXIMAGE_FORMAT_BMP);
  img2.Blt(GetDlgItem(IDC_STATIC_P)->GetDC()->GetSafeHdc());