Method Red

externals/bc_decoder/bc_decoder.cpp:960–962

            constexpr Bitfield IndexSelection() const { return Rotation().Then(ISB); }

            constexpr Bitfield Red(int idx) const {
                return IndexSelection().Then(CB * idx).Then(CB);
            }

            constexpr Bitfield Green(int idx) const {
                return Red(NumColors() - 1).Then(CB * idx).Then(CB);