Kris, I am trying to write my own drop shadow effect (mainly for learning and my own project needs). Drawing the shadow itself is quite easy and I can do it really fast even for larger bitmaps with irregular shapes (in fact bitmap contents doesn't matter). But the real bottleneck is the "grow shadow" part. Users can achieve great results with it, but my algorithm is too damn slow. So, I was hoping to take a look at your "beautiful" source code but it seems that you don't provide it any more. Can you please at least share the idea behind your "grow shadow" routine?
My first approach was simila