Diffusion Krita 4f16ff7c1d5c

Implement SAI-like Luminosity blending mode

Authored by tymond on Jul 15 2019, 9:30 AM.

Description

Implement SAI-like Luminosity blending mode

It was requested to make a new lighten mode that behaves
just like a Luminosity/Shine mode in SAI. This commit contains
the code that adds it to the program.

BUG:409627

Details