1 Replies - 625 Views - Last Post: 12 May 2013 - 07:33 AM

#1 StefanOnRails  Icon User is offline

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double buffering on canvas

Posted 12 May 2013 - 05:44 AM

Hi,

My question isn't really how to implement double buffering, but rather if it's worth doing it. I mean, the way I did it was by having two layered canvas elements. Basically, I was drawing on the hidden layer and when it was done I was swap-ing the visibility of the two layers. I saw no performance improvements, but rather a small flickering once in a while. Have I done anything wrong or it is simply not worth implementing.
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#2 Atli  Icon User is offline

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Re: double buffering on canvas

Posted 12 May 2013 - 07:33 AM

Hey.

I'm not sure about this, but I would have tried drawing onto an off-screen canvas, and then drawing that canvas onto the main canvas. The drawImage method should support drawing other canvas elements directly. - I see a potential performance issue with this, but if the browsers handle it correctly that shouldn't be an issue.

It's worth a try at least, and it's shouldn't be difficult to modify your existing "flipping" canvases to test this.
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