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- boring part
- the other part
KDE The Composited Desktop Lubo Luk Akademy 2007 Colour outside - - PowerPoint PPT Presentation
KDE The Composited Desktop Lubo Luk Akademy 2007 Colour outside - - PowerPoint PPT Presentation
KDE The Composited Desktop Lubo Luk Akademy 2007 Colour outside the lines Contents boring part the other part Colour outside the lines Non-composited X window contents are painted directly to the screen not-visible
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- window contents are painted
directly to the screen
- not-visible parts are thrown away
- no way to affect/transform painting
Non-composited X
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Non-composited X
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- window contents are painted to an
- ffscreen pixmap
- regardless of their visibility on the
screen
- by default they are also painted to
the screen
- a compositing manager can perform
the painting to the screen instead
Composited X
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Composited X
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Composited X
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- from the compositing manager's
point of view, they seem about the same, except for different bugs
- different implementations of
accelerated indirect rendering (video, OpenGL)
- having one that works should be
generally enough :)
AIGLX, XGL, nVidia
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- can be a separate application
(Kompmgr)
- separate is not powerful enough,
needs to be integrated with window manager
- Compiz - also replaces KWin as the
window manager
- KWin - with compositing support
Compositing manager in KDE
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- added one more pass for
composited painting
- whenever changes are detected
(XDamage extension for window contents), repaint is triggered
- added support for tracking
unmanaged (override redirect) windows
- various small changes
KWin compositing
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Painting pass
paint
E5 E4 E3 E2 E1
screen
E5 E4 E3
windows
E9 E8 E7 E6 E9 E8 E7 E6 E9 E8 E7 E6
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- can affect painting of windows or
the whole screen
- get notified about various events in
the window system
- X/OpenGL code not necessary for
many features
- API still under development
- no, can't use Compiz plugins
Effects
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Example
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- Under development
- Unstable
- Kind of works
- Needs more (useful) effects
Status
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?
(up to people to fill up)
Future
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- docs?
- kwin/COMPOSITE_HOWTO
- where to help?
- kwin@kde.org
- will it be absolutely cool?
- don't ask me
- will it be useful?
- that's the plan