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Doublebuffering with SWT [message #464664]

Mon, 28 November 2005 13:39

Eclipse User

Originally posted by: michael_imhof.ch.csc.com

Does SWT supports doublebuffering?
Within my application I have to redraw often (10 times/sec) and
without doublebuffering the whole screen is flickering!
I saw implementations using the gc.drawImage(..) function but this
is very slow and it seems to me that this function is copy the content
of the image to the gc (instead of switching from one to the other buffer).

Regards
Michael

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Re: Doublebuffering with SWT [message #464668 is a reply to message #464664]

Mon, 28 November 2005 14:23

Stefan Langer

Messages: 236
Registered: July 2009

Senior Member

This depends on the Platform you run on. Try using the
SWT.DOUBLEBUFFERING (<- could be written differently but it is definitly
in the SWT class) style on your canvas/composite and see what happens.

Regards
Stefan

Michael Imhof wrote:
> Does SWT supports doublebuffering?
> Within my application I have to redraw often (10 times/sec) and
> without doublebuffering the whole screen is flickering!
> I saw implementations using the gc.drawImage(..) function but this
> is very slow and it seems to me that this function is copy the content
> of the image to the gc (instead of switching from one to the other buffer).
>
> Regards
> Michael
>

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Re: Doublebuffering with SWT [message #464669 is a reply to message #464668]

Mon, 28 November 2005 14:57

ted@ted.net

Messages: 3
Registered: July 2009

Junior Member

SWT.DOUBLE_BUFFERED

ted@ted.net - ted.williams@windriver.com

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Re: Doublebuffering with SWT [message #464729 is a reply to message #464669]

Tue, 29 November 2005 09:12

Eclipse User

Originally posted by: mimhof.ch.csc.com

Thanks for the hint. SWT.DOUBLE_BUFFERED ist working. But its still
very slow (as slow as my previous version with drawImage)!

Michael

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Re: Doublebuffering with SWT [message #464733 is a reply to message #464729]

Tue, 29 November 2005 10:10

Stefan Langer

Messages: 236
Registered: July 2009

Senior Member

Which Platform are you on? Are you sure that Double buffering is
actually being executed?

Stefan

Michael Imhof wrote:
> Thanks for the hint. SWT.DOUBLE_BUFFERED ist working. But its still
> very slow (as slow as my previous version with drawImage)!
>
> Michael
>

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