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CBitmap manipulation

Posted on 1997-03-29
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Last Modified: 2013-11-20
Hello,

I am using MS devstudio 5 for NT 4.0 and I am having
problems handling simple bitmaps (256 colors). What should
be simple is taking me longer and longer to accomplish
as I get deeper and deeper in this mess of BITMAP, HBITMAP
BITMAPHEADERINFO and such...

What I am trying to do is simply to load a bitmap from file
and display it. And the reverse, storing it in a file.
(why is there no such thing as a CBitmap::WriteToFile()!!!)

Any how, this code shows the problem:
  *h= CreateDIBitmap(m_dcMem, &bmih, CBM_INIT, lpvBits, (BITMAPINFO*)lpmi, DIB_RGB_COLORS);

  CBitmap *px;
  DWORD tsize1;
  px= CBitmap::FromHandle(*h);
  tsize1= px->GetBitmapBits( (bmfh.bfSize - bmfh.bfOffBits), lpvBits );

h is a HBITMAP *. The problem is that tsize1 is only 67000
and NOT the expected (bmfh.bfSize - bmfh.bfOffBits) which
is more like 670000! What's wrong????

Is there a CBitmap toolkit or a derived class complete
with manipulation tools such a write/read and
copy to/from clipboard???? Can you provide references?
Is it free and does it work???

HELP... I am getting desperate!!!

Thanks.

Guy Thibault
gthibault@artefact.qc.ca

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Question by:aquila
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1 Comment
 

Accepted Solution

by:
syed_dgreat earned 150 total points
ID: 1300725
Regarding the first question, it's a big relief that Windows 95 + NT now provides a function which does exactly what you want:-
HBITMAP hBitmap = (HBITMAP)::LoadImage(AfxGetInstanceHandle(),
"mybitmap.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE);
And how to save the file is not very easy actually. You have
to manipulate BITMAPFILEHEADER bla bla bla... Let me know
if you are interested (email : sxs296@psu.edu). I cannot stay online for too long :(.

The last question :-
There's a free imaging OCX that I have found so far which
is quite excellent. It shows the copyright dialogbox during
startup though. The url of interest is
home.earthlink.net\~bananasoft

However, if you want your app to be really professional,
I suggest you to look for LeadTools (www.leadtools.com)

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