I want to implement something like "Filmic Blender" in GLSL. Thus I need the LUT and/or transfer functions in human readable format. Where can I find this.

I want to implement something like "Filmic Blender" in GLSL. Thus I need the LUT and/or transfer functions in human readable format. Where can I find this.

Update:

I have found that there are two sets of LUT:s. RGB to RGB mapping (I will use desat65cube.spi3d), and a 1d mapping for controlling contrast. New questions:

1. How are input values (those that comes from the lighting algorithm) mapped to the range [0, 64]
2. When is the contrast control applied
3. How does the exposure control work