CGBlendMode.destinationOut R = D*(1 - Sa) Declarationcase destinationOut See AlsoConstantsCGBlendMode.normalCGBlendMode.multiplyCGBlendMode.screenCGBlendMode.overlayCGBlendMode.darkenCGBlendMode.lightenCGBlendMode.colorDodgeCGBlendMode.colorBurnCGBlendMode.softLightCGBlendMode.hardLightCGBlendMode.differenceCGBlendMode.exclusionCGBlendMode.hueCGBlendMode.saturationCGBlendMode.color