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Re: [Traverso-devel] playhead cpu usage, crosshair like implementation n
From: |
Nicola Döbelin |
Subject: |
Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ? |
Date: |
Tue, 06 Feb 2007 14:04:39 +0100 |
> I've tried _again_ to solve the cpu hogging by playhead painting, but to
> no avail.
I must admit I'm surprised (or disappointed for that matter) by the poor
performance of QGraphicsView. After all it is advertised as a very powerfull
framework, designed to work with large numbers of 2D objects. Have you reported
your problems to a Qt specific list (e.g. qt-interest) or forum (e.g.
www.qtforum.org)?
Just an idea (although you probably tried this already): QGraphicsView inherits
from QWidget, so you should be able to bypass the QGraphicsScene, paint
directly on the widget and use 2 pixel wide buffers. With the current solution
the CPU usage depends on the number of clips beneath the play head. Would a
dual core CPU ever be able to cope with a >24 track project? If you paint on
the widget, CPU usage would depend on the window size, and actually be no issue
for such a small number of pixels.
Nic
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- [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Remon, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?,
Nicola Döbelin <=
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Remon, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Nicola Döbelin, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Remon, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Niklas Klügel, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Remon, 2007/02/06
- Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Nicola Döbelin, 2007/02/06
Message not available
Re: [Traverso-devel] playhead cpu usage, crosshair like implementation needed ?, Jonatan Liljedahl, 2007/02/07