[cairo] Fix for cairo_paint()

[Carl Worth]

On Wed, 27 Apr 2005 11:03:04 -0400, Owen Taylor wrote:
> So I tried using cairo_paint() and it wasn't working right with
> a translation in effect .. the area to paint was being gotten
> in backend coordinates but painted in user coordinates.

I noticed the same bug yesterday.

> Here's a fix and test case ... it should be pretty self-explanatory.

I committed a fix yesterday, (with a remarkably similar test
case). Your fix is better though as it doesn't' clear the current
path. Also, I realize that in my version, cairo_paint won't always get
the right result if the current path is not empty.

So, please commit this.

Kristian was talking yesterday about pushing paint down into a surface
backend function, which will help him in the meta-surface work. That's
probably a good idea as well, and this fix gets one step closer to
that.

-Carl
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