SImulate hard light blend mode

[jBachalo]

This is a modification I am trying to make to the existing code.
I have a face image with tatoos and I want this image to combine correctly with the 'live' captured face regardless of the users skin color.

Need to integrate this addon
https://github.com/Akira-Hayasaka/ofxPSBlend

Am able to compile but the blend effect is being applied to the entire image, not just the masked clone image.