OpenCV 打印图片对话框功能

这只是一个打印VS上的一个对话框的功能，需要在VS上安装OpenCV

CRect m_rect,framerect;

 //获取对话框大小

 GetWindowRect(m_rect);

 //获取图片控件大小

 m_Frame.GetWindowRect(framerect);

 int x,y;

 x=framerect.left-m_rect.left;

 CDC* pImageDC=GetDC();

 int formx,formy;

 formx=pImageDC->GetDeviceCaps(LOGPIXELSX);

 formy=pImageDC->GetDeviceCaps(LOGPIXELSY);

 ReleaseDC(pImageDC);

 DWORD dwflags=PD_PAGENUMS|PD_HIDEPRINTTOFILE|PD_SELECTION;  //设置打印对话框风格

 CPrintDialog m_printdlg(FALSE,dwflags,NULL);     //创建打印对话框

 if(m_printdlg.DoModal()==IDOK)

 {

  CDC pdc;

  pdc.Attach(m_printdlg.GetPrinterDC());

  //获取打印机与屏幕的分辨率

  int printerx,printery;

  printerx=pdc.GetDeviceCaps(LOGPIXELSX);

  printery=pdc.GetDeviceCaps(LOGPIXELSY);

  double ratex,ratey;

  ratex=(double)printerx/formx;

  ratey=(double)printery/formy;

  CClientDC dc(this);

  CBitmap bmp;

  bmp.CreateCompatibleBitmap(&dc,framerect.Width()+x,framerect.Height()+x);

  CDC imagedc;

  imagedc.CreateCompatibleDC(&dc);

  imagedc.SelectObject(&bmp);

  imagedc.BitBlt(0,0,framerect.Width()+x,framerect.Height()+x,&dc,0,0,SRCCOPY);

  BITMAP bmap;

  bmp.GetBitmap(&bmap);

  int panelsize=0;

  //非真彩色位图

  if(bmap.bmBitsPixel<16)

  {

   panelsize=pow(2,bmap.bmBitsPixel*sizeof(RGBQUAD));

  }

  BITMAPINFO* bInfo=(BITMAPINFO*)LocalAlloc(LPTR,sizeof(BITMAPINFO)+panelsize);

  bInfo->bmiHeader.biClrImportant=0;

  bInfo->bmiHeader.biBitCount=bmap.bmBitsPixel;

  bInfo->bmiHeader.biCompression=0;

  bInfo->bmiHeader.biHeight=bmap.bmHeight;

  bInfo->bmiHeader.biPlanes=bmap.bmPlanes;

  bInfo->bmiHeader.biSize=sizeof(BITMAPINFO);

  bInfo->bmiHeader.biSizeImage=bmap.bmWidthBytes*bmap.bmHeight;

  bInfo->bmiHeader.biWidth=bmap.bmWidth;

  bInfo->bmiHeader.biXPelsPerMeter=0;

  bInfo->bmiHeader.biYPelsPerMeter=0;

  char *pData=new char[bmap.bmWidthBytes*bmap.bmHeight];

  ::GetDIBits(imagedc.m_hDC,bmp,0,bmap.bmHeight,pData,bInfo,DIB_RGB_COLORS);

  //打印图像

  pdc.StartDoc("print");

  ::StretchDIBits(pdc.m_hDC,50,50,(int)((framerect.Width()*ratex)+x),

   (int)((framerect.Height()+x)*ratey),0,0,framerect.Width()+x,

   framerect.Height()+x,pData,bInfo,DIB_RGB_COLORS,SRCCOPY);

  pdc.EndDoc();

  LocalFree(bInfo);

  delete[] pData;

  bmp.DeleteObject();

 }