Solved

CBitmap manipulation

Posted on 1997-03-29
1
488 Views
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

0
Comment
Question by:aquila
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
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)

0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is to be the first in a series of articles demonstrating the development of a complete windows based application using the MFC classes.  I’ll try to keep each article focused on one (or a couple) of the tasks that one may meet.   Introductio…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question