[OpenJDK 2D-Dev] One or many GraphicsConfiguration(s) per toplevel?

Anthony Petrov Anthony.Petrov at Sun.COM
Thu Jan 22 11:04:34 UTC 2009

Hi Dmitri,

On 01/21/2009 10:23 PM Anthony Petrov wrote:
> Yeah, I see the point. Another option is to make the field private, 
> create a final package-private getter (though why? we have a lovely 
> public one already), and private setter. The setter would be invoked 
> through the sun.awt.AWTAccessor by the toplevel window whenever its own 
> GC gets changed (holding the TreeLock and traversing the whole 
> hierarchy). It will also be assigned when adding a component to a 
> container (by using the container's local copy of the gc - which we 
> assume correct). This way we ensure there's only one value of gc in 
> every single component in the given toplevel window at any moment of 
> time. I guess changing the GC is not quite frequent operation to worry 
> much about the performance of this approach?

By the way, Canvases may be created with a non-default GC. How should 
these be treated then if we think we should have the same GC for every 
component in a Window?

best regards,

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