CBitmap alignment issue

From:

"stopin" <stopin@nospam.nospam>

Newsgroups:

microsoft.public.vc.language

Date:

Tue, 17 Oct 2006 11:34:33 +0200

Message-ID:

<OC1Z19c8GHA.1256@TK2MSFTNGP04.phx.gbl>

Hi folks,

I am trying to use CBitmap and HBITMAP to display 24bpp images in my Windows
Mobile 5.0 application.
Everything works fine as long as my image is aligned on 4 bytes. Now not all
images are like that.

I tried the following:

******************************************************************
// get a buffer with 4-bytes aligned pixels
unsigned char* pBits = extractPixelDataAlignedBytes( );
// create a CBitmap
CBitmap* pBmp = new CBitmap();
pBmp->CreateBitmap(iWidth, iHeight, nPlanes, nBitcount, (const void*)
pBits) )

// Display image in CView::OnDraw()
{
....
HBITMAP hBmp = (HBITMAP)*pBmp;
if( hBmp )
{
  CRect rcClient;
  GetClientRect(&rcClient);

  dcMem.CreateCompatibleDC(NULL);
  dcMem.SelectObject(hBmp);

  pDC->StretchBlt(rcClient.left, rcClient.top,
      rcClient.right, rcClient.bottom,
      &dcMem,
      0,
      0,
      BmpWidth,
      BmpHeight,
      SRCCOPY);
}
}
*********************************************************************

The image is not displayed properly when I need to add 2 or 3 bytes at the
end of each line to be aligned on 4-bytes. That works when I need to add 1
byte to be aligned on 4-bytes...

Did I miss something? Is what I want to do possible with CBitmap object or
do I need to use a DIB object? (if not CBitmap are useless)

Thanks in advance
--
ST
---------------------------
stopin@nospam.nospam