GLSL / UPBGE help adding buffer bloom

Coding Beginning Blender Code and Development
1

https://www.shadertoy.com/view/lsBfRc

can someone help us port this to upbge?

it can be pure GLSL or a C patch .

I would like having eevee level bloom in time for upbge 0.2.5
(when the principled shader lands in the up-BGE)