plasma2 and ToolTipManager

[Martin Gräßlin]

On Monday 01 October 2012 19:36:34 Fredrik Höglund wrote:
> On Monday 01 October 2012, Martin Gräßlin wrote:
> > On Monday 01 October 2012 15:34:54 Aaron J. Seigo wrote:
> > > On Monday, October 1, 2012 15:15:23 Martin Gräßlin wrote:
> > > > Am 01.10.2012 14:46, schrieb Aaron J. Seigo:
> > > > > the GL texture would be generated and updated by the window manager
> > > > > but used b
> > > > > other applications (e.g.the desktop shell). how to address such
> > > > > textures is
> > > > > platform specific (windows, mac, x11, etc) but it is a broadly
> > > > > available
> > > > > functionality and one _we_ only need to care about on a very select
> > > > > #
> > > > > of
> > > > > platforms.
> > > > 
> > > > sharing OpenGL textures for the windows is an absolute no-go from the
> > > > security point of view in Wayland
> > > 
> > > in wayland, isn't the desktop shell also a secured (as in: controlled
> > > and
> > > identified) process?
> > 
> > If it gets started by the session control (or the compositor) probably
> > yes.
> 
> The desktop shell is always started by the compositor or it won't
> be allowed to bind the desktop shell interface.
> 
> > But that doesn't mean that I would like to have texture sharing ;-) I just
> > wrote that quickly down while reading the mails during work and security
> > is
> > for me always the strongest argument.
> > 
> > There are more things which speak against the approach of sharing window
> > textures. I do not want to go into detail but I'm strictly against this
> > approach and would not add it to KWin due to the way how windows are
> > rendered to the screen (note: it's five textures not one). I hope that
> > you trust my judgement in that regard that sharing the window texture
> > from KWin is extremely difficult, in fact so difficult that I suppose a
> > completely different approach which is hardly from trivial either.
> 
> KWin would not share the actual texture(s). There is no mechanism that
> would allow you to do that even if you wanted to.
Aaron outlined an idea about shared memory some time back. My understanding 
was that it's not about rendering to a pixmap and doing TFP inside plasma.
> Instead it would render
> the window into a pixmap, and make the pixmap handle known to plasma.
> Plasma can then texture directly from the pixmap if it uses OpenGL,
> or render it by other means if doesn't.
> 
> I don't foresee that this would add much complexity to the thumbnail
> effect.
yeah that would not be much difference, especially as that is already more or 
less available in the screenshot effect. But as said that's not how I 
understood it.

Cheers
Martin
> 
> Fredrik
> 
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