[cairo] Carl, please add an extra methond in Cairo

[Keith Packard]

On Sat, 2005-08-13 at 22:30 +0800, Jackey Yang wrote:
> Carl,
> 
> Would you mind to add the following patch into cvs, so we can get a glitz 
> surface from a cairo surface. It may not necessary for most of you guys but 
> we do. I think this method will be widely used when there are more 
> applications based on cairo*^_^*. Thx lots, nice day.

You'll have to add a check to make sure the provided surface actually is
a glitz surface and do something about that case,
otherwise you're going to have some 'interesting' errors here.

-keith

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