#3 change the InitData / ReleaseData

[Fred Tomas Ang]

Martin: care to review?

I make it more clear
the grgfxNew now take a size parameter to allocate the
private member for the grgfx. And it will pass that to
the InitData function for initialization. It will pass
it to the ReleaseData function in the destructor. and
it will free the private size also

could you r= it ?

[Fred Tomas Ang]

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here is the diff

[Fred Tomas Ang]

make the interface clearer