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Cannot print out an image file

Hello,

I am trying to do printing without the CView/CDocument architecture in my MDI application.  Below is my printing code.  Testing the printing code, the text "Hello World" prints out but the sample bitmap in the resource does not get printed.  What am I doing incorrectly?  The StretchBlt() fails, always returning a value of zero.


void CMainFrame::OnFilePrint()
{
      // TODO: Add your command handler code here
      CLog Log;
      teLogLevel eLogLevel = Log.GetLogLevel();
      char   pbuf[100] = "Hello World.";
      HDC    hdcPrn ;

      // Instantiate a CPrintDialog.
      CPrintDialog *printDlg =
            new CPrintDialog(FALSE, PD_ALLPAGES | PD_RETURNDC, NULL);

      // Initialize some of the fields in PRINTDLG structure.
      printDlg->m_pd.nMinPage = printDlg->m_pd.nMaxPage = 1;
      printDlg->m_pd.nFromPage = printDlg->m_pd.nToPage = 1;

      // Display Windows print dialog box.
      printDlg->DoModal();

      // Obtain a handle to the device context.
      hdcPrn = printDlg->GetPrinterDC();
      if (hdcPrn != NULL)
      {
            if (eLogLevel >= eMinimum)
                  Log.WriteLog("Start printing process.");
            CDC *pDC = new CDC;
            pDC->Attach (hdcPrn);// attach a printer DC

            DOCINFO docInfo;
            memset(&docInfo, 0, sizeof(DOCINFO));
            docInfo.cbSize = sizeof(DOCINFO);
            char szName[] = _T("Test");
            docInfo.lpszDocName = szName;
            docInfo.lpszOutput = NULL;
            pDC->StartDoc(&docInfo);// begin a new print job
                                                                              // for Win32 use
                                                                              // CDC::StartDoc(LPDOCINFO) override

            SetPrintAlign(pDC, hdcPrn);// Set the printing alignment

            //need to figure out how many pages to print based on the printing
            //layout selected by the user
            //for testing now, print each image on one page and the study information
            //on each page as well

            int iRetVal = pDC->StartPage();          // begin a new page
            if (iRetVal < 0)
            {//error occured in preparing the printer driver to receive data
                  pDC -> EndDoc();
                  pDC->Detach();             // detach the printer DC
                  delete pDC;
                  if (eLogLevel >= eMinimum)
                        Log.WriteLog("Error occured in preparing the printer driver to receive data.");
                  delete printDlg;
                  return;
            }
      HBITMAP hPixmap = LoadBitmap (AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_COLORUP));
  if(hPixmap == NULL) return;
  HDC tempDC = CreateCompatibleDC(pDC -> GetSafeHdc());
  HBITMAP oldBM = (HBITMAP)::SelectObject(tempDC, hPixmap);
  BITMAP bm;
  GetObject (hPixmap, sizeof(BITMAP), (LPSTR)&bm);

  int ret = 0;
      pDC -> SetStretchBltMode(COLORONCOLOR);
  ret = StretchBlt(hdcPrn, 10, 10,
                              bm.bmWidth, bm.bmHeight,
                      tempDC, 0, 0,
                      bm.bmWidth, bm.bmHeight, SRCCOPY);
  SelectObject(tempDC, oldBM);

  DeleteDC(tempDC);
            
            pDC->TextOut(10, 10, pbuf);// write the string in pbuf
            iRetVal = pDC->EndPage();            // end a page
            if (iRetVal < 0)
            {//error occured in writing to a page
                  pDC -> EndDoc();
                  pDC->Detach();             // detach the printer DC
                  delete pDC;
                  if (eLogLevel >= eMinimum)
                        Log.WriteLog("Error occured in writing to a page.");
                  delete printDlg;
                  return;
            }

            pDC->EndDoc();             // end a print job

            pDC->Detach();             // detach the printer DC
            delete pDC;
      }

      delete printDlg;
}//endof OnFilePrint


void CMainFrame::SetPrintAlign(CDC *pDC, HDC hdcPrn)
{
      short cxPage, cyPage;

      cxPage = ::GetDeviceCaps (hdcPrn, HORZRES) ;
      cyPage = ::GetDeviceCaps (hdcPrn, VERTRES) ;
/*
      pDC->SetMapMode(MM_ISOTROPIC) ;
      pDC->SetWindowExt (1000, 1000) ;
      pDC->SetViewportExt(cxPage / 2, -cyPage / 2) ;
      pDC->SetViewportOrg(cxPage / 2,  cyPage / 2) ;
*/
      pDC->SetMapMode(MM_ANISOTROPIC) ;
      pDC->SetWindowExt (2000, 2000) ;
      pDC->SetViewportExt(cxPage, -cyPage) ;
      pDC->SetViewportOrg(0,  cyPage) ;
      pDC->SetTextAlign(TA_BASELINE | TA_CENTER) ;
}//endof SetPrintAlign

Any help will be greatly appreciated and neck-saving!  Thank you.

Jennifer
0
jli
Asked:
jli
1 Solution
 
yangjunCommented:
I came across the same problem. The reason in my situation is in CreateCompatibleDC
If you print to Postscript printer, you can't print, since a PS printer is not a Raster printer! Use DIB instead of DIB can solve your problem!

0

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