[SOLVED] Can't take screenshot on Linux with BGRABitmap / With wiki code

[lainz]

Hi, this is my code:

Code: Pascal  [Select][+][-]

1. procedure TfrmSoporte.btnCapturaDePantallaClick(Sender: TObject);
2. var
3.   bitmap: TBGRABitmap;
4. begin
5.   try
6.     bitmap := TBGRABitmap.Create;
7.     try
8.       Application.Minimize;
9.       Application.ProcessMessages;
10.       sleep(1000);
11.       bitmap.TakeScreenshotOfPrimaryMonitor;
12.       Application.Restore;
13.       captura := GetTempDir(False) + FormatDateTime('dd_mm_yyyy_hh_nn_ss', Now) + '.jpg';
14.       bitmap.SaveToFile(captura);
15.       ShowMessage(rsCapturaPantalla);
16.       btnVerCaptura.Enabled := True;
17.     except
18.       on E: exception do
19.       begin
20.         captura := '';
21.         ShowMessage(rsErrorCapturaPantalla + LineEnding + e.Message);
22.       end;
23.     end;
24.   finally
25.     bitmap.Free;
26.   end;
27. end;

On Windows works fine.

On Ubuntu it fails showing:

Code: Pascal  [Select][+][-]

1. Cannot get raw image from device

[balazsszekely]

This works well both on windows and linux: http://wiki.lazarus.freepascal.org/Developing_with_Graphics#Taking_a_screenshot_of_the_screen

[lainz]

This works well both on windows and linux: http://wiki.lazarus.freepascal.org/Developing_with_Graphics#Taking_a_screenshot_of_the_screen

Thanks. I will try.

Also I must report that BGRABitmap way is not working on macOS:

"Unable to create CGContextRef".

[lainz]

This works well both on windows and linux: http://wiki.lazarus.freepascal.org/Developing_with_Graphics#Taking_a_screenshot_of_the_screen

Is not working for me on Linux, only Windows. It seems that BGRABitmap is using the wiki code also.

Edit: I'm using Lazarus trunk (1.9) fpc trunk (3.1.1) and for mac and Linux I'm using Virtual Machines. It should work on a VM?

Someone can test on real device?

Edit 2: Tested on a new VM on ElementaryOS and works fine, maybe it's an Ubuntu problem?

[balazsszekely]

On Linux Mint 18.3 both your and my code works well(also on wm). Perhaps some libraries are missing on ubuntu?

PS: On OSX none of the above method works.  Anyway carbon is fading out fast. I did not try with cocoa.

[lainz]

Thanks for testing, well is nothing we can do =)

I will mark it as solved.