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From Noel Grandin <noelgran...@gmail.com>
Subject Re: Double buffering of components
Date Fri, 20 Jan 2012 09:35:36 GMT

It could be that something is generating repaint() events with a larger 
repaint region than necessary.
Can you track down the source of the repaint() events and check if this 
is the case?

-- Noel Grandin

On 2012-01-20 11:09, Piotr Kołaczkowski wrote:
> Hi,
> Is there support for explicit double-buffering of components 
> (especially windows) like it is in Swing?
> Currently I faced another performance problem - imagine a top level 
> Window with a one single Frame open in it.
> The Window contains an animation, that needs to be repainted at >30 
> FPS. When I issue the repaint, not only the window gets repainted, but 
> also the parts of the frame that happened to be inside the repaint 
> region (if the user shadows a part of the animation with the frame, 
> the frame gets the repaints).
> For complex Frames with lots of components inside them, it may be 
> slow. And it is not needed, because I actually haven't changed 
> anything inside the frame, so it is perfect case for double buffering 
> and drawing the whole frame with a single drawImage statement.
> So, is there a workaround now for this? Is this planned?
> Regards,
> Piotr

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