applying marching squares algorithm on ttf fonts for glowing them at the contours(highlighting fonts )


hi, all the geeks out there

I am trying to set a glow around the fonts.

in my previous post I posted about glowing the sprites
I ended up adding another sprite.
but, fonts cannot be dealt with the same way.

I want to get the texture of fonts(if it has)to work upon it.

the only thing comes to my mind is applying marching squares algorithm.

any ideas or suggestions are welcome.