How to take snapshot in linux - programmatically C++

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+6 Q:

How to take snapshot in linux - programmatically C++

I am currently involved in a project which requires me to repeatedly take snapshots of the screen. I am using qt's grabScreen function to do the same. The screen freezes for half a second every time the program takes a snapshot causing the computer to seem to be very slow :(

Can anybody suggest me a better method of doing this ?

+1 A:

You could look at the source of, say, ksnapshot which is the Qt-based KDE app doing this. Its SVN archive is here.

Dirk Eddelbuettel 2010-05-11 21:26:49

I have seen the source code of ksnapshot and have also gone through the code of an example screenshot program on trolltech's website (http://doc.trolltech.com/4.2/desktop-screenshot.html), both of which use basically the same function. And I am even using that very function ( without the gui interface - I don't need the interface right now )

bhanuvrat 2010-05-12 01:28:49

+1 A:

If you're OK with doing it in lower level manner, then you should look into one of those xorg tools that I can't remember the name of. It's installed by default and outputs the screenshot in a bitmap format. It's a shame I can't remember the name.

EDIT: I got it! It's "xwd". Cheers.

Andreas 2010-05-12 10:23:42

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How to take snapshot in linux - programmatically C++

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