Solved

How save Screen to Bitmap image?

Posted on 2000-03-23
4
375 Views
Last Modified: 2010-05-18
How save Screen to Bitmap image in C++?
Please can anyone send me example code?
0
Comment
Question by:Viesturs
[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
  • 2
4 Comments
 
LVL 22

Expert Comment

by:nietod
ID: 2649340
Standard C++ provides no mechanism for this.  Standard C++ doesn't even assume there is a screen, much less contain any features for dealing with bitmaps.

In order to do this you will have t make use of Operating System-specific code.  That raises the question--What operating system do you need this for?

In windows you can use

HDC ScreenDC = CreateDC("DISPLAY",NULL,NULL,NULL);
HDC MemDC = CreateCompatibleDC(ScreenDC);
HBITMAP BitMap = CreateCompatibleBitmap(ScreenDC,GetSystemMetrics(SM_CXSCREEN),GetsystemMetrics(SM_CYSCREEN))
HBITMAP OldBmp = SelectObject(MemDC,BitMap);

BitBlt(MemDC,0,0,,GetSystemMetrics(SM_CXSCREEN),GetsystemMetrics(SM_CYSCREEN),ScreenDC,0,0,SRCCOPY);

SelectObject(MemDC,OldBmp);
DeleteDC(ScreenDC);
DeleteDC(MemDC);

The code creates a DC for the screen and a compatible one for a memory bitmap.  Then it creates a memory bitmap the same size as the screen.  It selects the memory bitmap into the memory DC.  Then it copies the screen's bitmap to the memory bitmap with BitBlt().   Then it cleans up by restoring the memory DC's original bitmap (important step!).  and deletes the two DCs.
0
 
LVL 14

Expert Comment

by:AlexVirochovsky
ID: 2649359
 WINCAP Captures Screens Using DIB API
http://support.microsoft.com/support/kb/articles/q97/1/93.asp

Create dib and save to disk.
0
 
LVL 14

Accepted Solution

by:
AlexVirochovsky earned 50 total points
ID: 2657118
I repete my reply:
  WINCAP Captures Screens Using DIB API
http://support.microsoft.com/support/kb/articles/q97/1/93.asp 
Create dib and save to disk.
Alex


0
 
LVL 1

Author Comment

by:Viesturs
ID: 2660114
Spasibo. Primer skachal, tolko ne uspel posmotrets. :)
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. A brief on problem: Lets take example problem for simplicity: - I have a G…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

691 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