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Drawing an image on a double buffered canvas [message #883302]

Fri, 08 June 2012 08:41

Jan Krakora

Messages: 477
Registered: December 2009
Location: Prague

Senior Member

Hi,

I'm trying to draw an image on a canvas.

I just create a shell with a canvas and draw a png image on it.
When I create the Canvas with the SWT.NONE style, the time required for rendering
is about twice longer than with the SWT.DOUBLE_BUFFERED style. I'm running on Windows 7.

I thought the double buffering technique is used for reducing flashing. So in my opinion
SWT.DOUBLE_BUFFERED should take longer.

Can somebody explain it to me?

Thanks

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