MFC图像显示

COLORREF *m_Data;
   CBitmap bm;
   CDC *MemDc = new CDC;
   int m_iWidth = pDoc->m_iWidth, m_iHeight = pDoc->m_iHeight;
   pDC->SetBkMode(TRANSPARENT);//设置背景颜色为透明
   m_Data = new COLORREF[m_iHeight * m_iWidth];//为颜色数据分配空间
   //颜色空间赋值
   for (int i = 0;i < m_iHeight;i++)
   {
    for (int j = 0;j < m_iWidth;j++)
    {
     m_Data[i * m_iWidth + j] = RGB((pDoc->TheImage8U->imageData[i * m_iStep + j]),(pDoc->TheImage8U->imageData[i * m_iStep + j]),(pDoc->TheImage8U->imageData[i * m_iStep + j]));
    }
   }
   //创建bitmap
   bm.CreateBitmap(m_iWidth,m_iHeight,1,32,m_Data);
   //实现双缓冲，避免闪烁
   MemDc->CreateCompatibleDC(pDC);
   MemDc->SelectObject(&bm);
   pDC->SetStretchBltMode(COLORONCOLOR);
   pDC->StretchBlt(0,0,m_iWidth,m_iHeight,MemDc,0,0,m_iWidth,m_iHeight,SRCCOPY);
   //删除已经分配的内存空间
   ReleaseDC(MemDc);
   delete MemDc;
   bm.DeleteObject();
   delete[] m_Data;