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MFC VC++ Topics: Print a bitmap full page
By Niek Albers. 

Print a bitmap full page.



Printing a bitmap isn't very difficult to do. I saw several solutions which used creation of DIB sections and quite some code. The trick here is to use the "LoadImage" API which can do that for you. This code uses portions of Chris Maunder's printing article:

void PrintBitmap(LPCTSTR filename) {
 CPrintDialog printDlg(FALSE);
 // Or get from user:
 // if (printDlg.DoModal() == IDCANCEL)   
 //        return; 
 CDC dc;
 if (!dc.Attach(printDlg.GetPrinterDC())) {
  AfxMessageBox(_T("No printer found!")); return;
 dc.m_bPrinting = TRUE; 
 DOCINFO di;    
 // Initialise print document details
 ::ZeroMemory (&di, sizeof (DOCINFO));
 di.cbSize = sizeof (DOCINFO);
 di.lpszDocName = filename; 
 BOOL bPrintingOK = dc.StartDoc(&di); // Begin a new print job 
 // Get the printing extents
 // and store in the m_rectDraw field of a 
 // CPrintInfo object
 CPrintInfo Info;
 Info.SetMaxPage(1); // just one page 
 int maxw = dc.GetDeviceCaps(HORZRES);
 int maxh = dc.GetDeviceCaps(VERTRES); 
 Info.m_rectDraw.SetRect(0, 0, maxw, maxh); 
 for (UINT page = Info.GetMinPage(); page <= 
      Info.GetMaxPage() && bPrintingOK; page++) {
  dc.StartPage();    // begin new page
  Info.m_nCurPage = page;
  CBitmap bitmap;
  // LoadImage does the trick here, it creates a DIB section
  // You can also use a resource here
  // by using MAKEINTRESOURCE() ... etc. 
   ::GetModuleHandle(NULL), filename, IMAGE_BITMAP, 0, 0, 
    AfxMessageBox(_T("Error loading bitmap!")); return;
   BITMAP bm;
   int w = bm.bmWidth; 
   int h = bm.bmHeight; 
   // create memory device context
   CDC memDC; 
   CBitmap *pBmp = memDC.SelectObject(&bitmap);
   // now stretchblt to maximum width on page
   dc.StretchBlt(0, 0, maxw, maxh, &memDC, 0, 0, w, h, SRCCOPY); 
   // clean up
   bPrintingOK = (dc.EndPage() > 0);   // end page
 if (bPrintingOK)
   dc.EndDoc(); // end a print job
 else dc.AbortDoc();           // abort job. 

That's all there is to it. Have a nice day!



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