Porting a BlastEm shader to ReShade

Hello! I recently came across a really good CRT shader within the BlastEm emulator, and I'd like to port it to ReShade as I haven't been able to find one already made, but I don't know where exactly to start or how to port something like this. Would anyone with a lot more knowledge on how this works be able to help in any way?

Here's the source for the shader:
github.com/libretro/blastem/blob/libretro/shaders/crt.f.glsl
github.com/libretro/blastem/blob/libretro/shaders/crt.v.glsl