Please test: Sharpen+, Shadow/Highlight, LocalContrast (rebuilt on Fastblur)

[Tanel]

I have redesigned those effects to use my own* fastblur code instead of calling PdN's gaussian blur.

Benefit is faster, radius independent performance. For better user experience, blur is rendered only when changing radius, otherwise the blurred copy is held intact on tempsurface.

I am eager to find out how it works on different systems. So please try those out and give some feedback.

Download: tanel_plugintest_20101205.zip

* The blur code is actually implemented from http://free.pages.at/easyfilter/gauss.html (gauss2.ffp).

Thanks to Alois Zingl for this impressive study and permission to use it.