gsk:component-transfer-new-gamma (amp exp ofs)

amp -- a number coerced to a single float for the amplitude
exp -- a number coerced to a single float for the exponent
ofs -- a number coerced to a single float for the offset

Creates a new component transfer that applies a gamma transform. The new value is computed as

C' = amp * pow (C, exp) + ofs  

Figure: gsk:component-transfer-new-gamma

Since 4.20