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Take Screenshots Easy

Started by b1gjo3 Jul 2, 2009 at 2:40 PM 6 replies 1.3k views

Original Post

Jul 2, 2009 at 2:40 PM

Hi everyone, i just finished a very small project in c++ to take screenshots of the entire screen with one simple function. It uses GDI+ lib heres a link to download, http://www.megaupload.com/?d=2ZOYGT4B heres some sample code


#include <screenshot.hpp>
#pragma comment(lib, "screenshot")

int main(int argc, char** argv)
{
    ScrLib::TakeScreenshot("C:\\screenshot.bmp"); //save as bmp
    ScrLib::TakeScreenshot("C:\\screenshot.jpg"); //save as jpg
    return 0;
}

all you do is specify the path you want to save to, and it will automatically save it as bmp, jpg, jpeg, gif, tiff, png depending on what you specified. hope this will help someone in the future. thanks, leave constructive criticism only

fastcall22

Jul 2, 2009 at 4:31 PM

You can do the same with ctrl+PrintScreen and pasting into a paint program.

Halifax2

Jul 2, 2009 at 4:45 PM

Quote:
Original post by _fastcall
You can do the same with ctrl+PrintScreen and pasting into a paint program.

True, but what if you want to take a development debugging screenshot to see how the frame looks while only 50% of the frame has been rendered. You can't really get that type of time resolution and precision with your eyes and using that keystroke.

Overall, ctrl+PrintScreen is probably the best option, but this definitely is not without its uses.

[Edited by - Halifax2 on July 2, 2009 5:45:32 PM]

b1gjo3

Jul 2, 2009 at 5:15 PM

Quote:
Original post by _fastcall
You can do the same with ctrl+PrintScreen and pasting into a paint program.

hehe, this is true indeed. but i would hardly be called a programmer if i had to do something manually lol.

riruilo

Jul 2, 2009 at 5:23 PM

Very useful and super easy-to-use.
A multiplatform version (linux/mac) would be nice.

adeyblue

Jul 2, 2009 at 6:14 PM

Few things:

Any reason you check whether GetDC fails, but not CreateCompatibleDC/CreateCompatibleBitmap? Also if GetDC() does fail, trying to continue taking the screenshot as the code does is futile. It can't possibly succeed.

You shouldn't use free() on memory returned by new[] (the wide string buffer for MultiByteToWideChar), use delete[].

And a tip, if you've got a std::string you can use string.length() to get its length. strlen() on the original char* is not neccessary.

george135

Jul 3, 2009 at 8:51 AM

The right code is in MSDN for years (GDI and GDI+), but both samples are not the best method (slow) for Screen Capture.
The best method is with DX, in DX SDK

b1gjo3

Jul 3, 2009 at 3:12 PM

Quote:
Original post by george135
The right code is in MSDN for years (GDI and GDI+), but both samples are not the best method (slow) for Screen Capture.
The best method is with DX, in DX SDK

would'nt the end user have to have dx installed though, when i made it i wanted it to have very little dependencies, and high portability (still working on this part)

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