RE: [css3-background] Curved borders intersecting backgrounds of inner boxes

> If we do look at  'background-clip', then perhaps we use whichever one
> in the background that is biggest. 

<style>
	H1, H2, H3
	{
		border:1px;
		border-radius:25%;
		padding:1px;
	}
	H1 {
		background-clip:border-box,padding-box,content-box;
	}
	H2 {
		background-clip:padding-box,content-box;
	}
	H3 {
		background-clip:content-box;
	}
</style>

H1 should clip to the border-box curve, H2 to the padding-box curve, and H3 to the content-box curve.

Given that neither padding nor border widths can be negative, it remains conveniently simple.


> I don't know the answer, but it looks like something needs to change or
> be clarified. I WOULD like overflow to clip to the inner curve when
> appropriate, and to me that means also clipping the straight portions
> of the box too, to a box that aligns with those curves.

So if "background-clip:padding-box;" was added to this example...
	http://ieblog.members.winisp.net/misc/sylvain.border-radius.example2.html


then overflow clipping should clip to the white shape in the right rendering of this image...
	http://ieblog.members.winisp.net/images/sylvain_rounded_corners_2.png



Is my interpretation correct?