KWin and Qt5

[Marco Martin]

On Monday 09 May 2011, Alexis Ménard wrote:
> Hi,
> 
> There are big differences between QGPW and QWidget sitting on top of
> the scene graph.
> 
> QPW we needed to :
> 
> - Convert all events from a QWidget (QGV) to QGS then back to QWidget.
> - Hook up the painting code from one QPainter to the paintEvent of QWidget.
> 
> QGV was a framework sitting on top of another one (QWidget) trying to
> integrate again with the one it's sitting on.
> 
> The way I see the QWidget integration with scene graph is WAY more simple :
> 
> - No event redirections/machinery (this is managed by Lighthouse already).
> - All drawing calls made on QPainter goes to the scene graph.

any idea how this redirection works?
from what i see of QSGPaintedItem it seems to create and upload an entire 
image each paint event, but i still hope to have it understood wrongly(tm) ;)

-- 
Marco Martin