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From Piotr Kołaczkowski <p.kolaczkow...@sages.com.pl>
Subject Re: Double buffering of components
Date Fri, 20 Jan 2012 14:13:24 GMT

Can't see a difference. But I have to profile it to see what is causing 
the slowdown.
Thanks for the patch.

-- Piotr

W dniu 20.01.2012 13:53, Noel Grandin pisze:
> Hmm, interesting idea.
> This is a prototype patch. Try it out and let me know how it goes.
> -- 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

Piotr Kołaczkowski
senior consultant
Sages Sp. z o.o.

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