I think I wrote the most basic bloom shader ever I don't really know how they work, this is a very experimental thing, but it works fast (no fps drop). it applies no blurring, samples only one pixel at a time, and there are simply 3 parameters to tweak: lower limit (to decrease dark contrast), luminance (produces contrast), and +/- brightness correction. atm it's okay, for me at least maybe it is not a bloom shader at all...
I don't really know how they work, this is a very experimental thing, but it works fast (no fps drop). it applies no blurring, samples only one pixel at a time, and there are simply 3 parameters to tweak: lower limit (to decrease dark contrast), luminance (produces contrast), and +/- brightness correction. atm it's okay, for me at least 
