Screenshot Browser

[Albuquerster]

Hello,

I need to develop an application in c++ where the screenshot of a browser should be done.
Would anyone please have any examples?

Thanks.

[Ganado]

Not promising to help, but what operating system?

If Windows, you need to find the handle for the window you want to take a screenshot of, figure out its dimensions to determine the size of the bitmap, then create a bitmap and fill in the bitmap.

You use Windows API calls like GetWindowRect and PrintWindow.
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getwindowrect
https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-printwindow

Here is an example:
https://stackoverflow.com/questions/7292757/how-to-get-screenshot-of-a-window-as-bitmap-object-in-c

[Albuquerster]

Hi,

The operating system is Windows.
When images are displayed in a Browser, there is no concept of a window.
Any other suggestions?

Thks.

[jonnin]

there must be some terminology mixup. Browsers certainly have their window when showing an image. If it has a full screen option, that is another story, are you in fullscreen? If so, get the whole screen as your capture.
screenshots of images are lower quality than just fetching the original image from the browser's cache (tricky... names are just junk) or going to the site and getting it yourself.

I think you can get the entire screen, all open programs, start menu, desktop background, etc. It gets things you don't want, but it may be easier to code.

[Ganado]

Tell us exactly what you want to do, and more importantly, why. Otherwise, this smells like one of those "XY problems". Perhaps you are looking for something like wget, to download content from a webpage.

[Albuquerster]

hello,
I need to capture the image displayed in the browser in c++.

Thks.

[deleted account xyzzy]

There is no graphical I/O with ISO standard C++, doing what you seem to want requires a third party library.

Since you are on Windows the "best" 3rd party library is the Win API. Fair warning, what constitutes the API is a HUUUUGE undertaking. And a lot of 'net referenced material is not well documented and, well, frankly, grossly out of date with regards to the new technologies Windows has.

Doing a 'net search for "C++ windows screen capture" resulted in this metasearch:
https://duckduckgo.com/?q=c%2B%2B+windows+screen+capture&t=ffsb&ia=web

Following the MSDN link ( Screen Capture in Windows Using(C++) - https://social.msdn.microsoft.com/Forums/vstudio/en-US/32fb271c-e55f-4966-b1c4-0c26720eb8fa/screen-capture-in-windows-usingc ) there was another link at the referenced article.
https://www.codeproject.com/Articles/20367/Screen-Capture-Simple-Win32-Dialog-Based

Automating the process of screen capture is doable.

[jonnin]

I would try to find a back door. All major browsers have a right click save image as functionality. If you can tap that, your work is 90% done.

[Ganado]

I think OP wants the equivalent of wget, to download an image? I believe wget uses its own back-end library, but I could be mistaken (check the source).
https://www.gnu.org/software/wget/

There is also cURL, which has its own library, libcurl, which is a library for transferring files and can work over HTTP and HTTPS.
https://curl.se/libcurl/

So you'd either need to build one of these libraries yourself (probably curl), or, depending on what your needs are, you could probably get away with just invoking wget or curl from your program or from the command-line.
e.g.

curl "https://upload.wikimedia.org/wikipedia/commons/f/fa/Triturus_vulgaris_maennchen_cropped.jpg" > out.jpg

[deleted account xyzzy]

@Ganado, even if (big conjecture) the OP wants that doing so still requires a third party library.