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List:       kwin
Subject:    Re: Display windows via composite and without in the same time.
From:       Martin Graesslin <mgraesslin () kde ! org>
Date:       2013-08-20 19:51:12
Message-ID: 7827932.0AFjEi6xHb () martin-thinkpad
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On Tuesday 20 August 2013 20:56:43 Andrew V. Stepanov wrote:
> I have few windows, that are secure. And I want to protect from making
> screenshot of them.
> Any program can ask for Pixmap for redirected window.
> I can protect X protocol via SeLinux, I mean CopyArea, GetImage ...
> 
> But if window was passed to composite, than there would not be a method to
> prevent catch it pixmap.
and any client can do automatic compositing of a window and thus redirect it 
into a pixmap. I do not really understand your usecase, but I think the X 
protocol is too broken for such a setup - sorry. Go for Wayland with XWayland.

Cheers
Martin

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