bicubic sampling example using pixel bender?

Question

I am new to pixel bender and wondering if anyone knows how bicubic [down]-sampling would be implemented using adobe's pixel bender?

Here is an example of how Bilinear [down]-sampling can be implemented.

Answer 1

I've just tried. See if it is what you want http://blog.onthewings.net/2009/08/25/bicubic-resampling-by-pixel-bender/