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List:       kde-core-devel
Subject:    Re: Transparency -- take 2
From:       Stefan Taferner <taferner () salzburg ! co ! at>
Date:       1999-09-29 13:41:48
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On Wed, 29 Sep 1999, Mosfet wrote:
> On Wed, 29 Sep 1999, Geert Jansen wrote:
[...]
> > I don't like this way. A better way (IMO) would be: kdesktop renders the
> > backgroup (like it is doing now). It writes it to the root window's
> > background and keeps it. It then publishes the pixmap ID to a property on
> > the root window. The clients read this property and do a XCopyArea() to a
> > QPixmap's handle(). A special class ("KBackgroundPixmap") will be provided 
> > for the latter. 
> 
> I like this too and considered it (sharing the Pixmap handles across
> applications). The problem: When KDesktop crashes all psudeo-transparent apps
> will crash. You will need to check before each access and do something else if
> the "server" is gone.

Are you sure?

I thought that the pixmaps are in the server, and if you do not free them they
stay there. He wants to publish the ID, not the pointer. So it should work even
in the case of a KDesktop crash.

--Stefan

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