Constant radiant_rs::blendmodes::ADD

pub const ADD: BlendMode = BlendMode{color:
              BlendingFunction::Addition{source: LinearBlendingFactor::One,
                                         destination:
                                             LinearBlendingFactor::One,},
          alpha:
              BlendingFunction::Addition{source: LinearBlendingFactor::One,
                                         destination:
                                             LinearBlendingFactor::One,},
          constant_value: Color(0.0, 0.0, 0.0, 0.0),}

Adds source and destination.