AE Blend modes inside SDK - pixel depth and gamma

Hi! Two questions.

1. In order to get 1.0 gamma when I get the input buffer image, will this work ?

 File > Project Settings and select Blend Colors Using 1.0 Gamma

2. Does AE - either in the app or via SDK use floating point for blend modes allowing for HDR and preserving out of range data? AE SDK docs state that - After Effects functions such as PF_BLEND() have not been enhanced to work with pixel formats beyond 8-bit RGB