636 	Mode,  enumerator
1107 struct Mode  struct
1109 	const int IDX;  // Mode index
1110 	const int NS;   // Number of subsets in each partition
1111 	const int PB;   // Partition bits
1112 	const int RB;   // Rotation bits
1113 	const int ISB;  // Index selection bits
1114 	const int CB;   // Color bits
1115 	const int AB;   // Alpha bits
1116 	const int EPB;  // Endpoint P-bits
1117 	const int SPB;  // Shared P-bits
1118 	const int IB;   // Primary index bits per element
1119 	const int IBC;  // Primary index bits total
1120 	const int IB2;  // Secondary index bits per element
1122 	constexpr int NumColors() const { return NS * 2; }  in NumColors()
1123 	constexpr Bitfield Partition() const { return { IDX + 1, PB }; }  in Partition()
1124 	constexpr Bitfield Rotation() const { return Partition().Then(RB); }  in Rotation()
1125 	constexpr Bitfield IndexSelection() const { return Rotation().Then(ISB); }  in IndexSelection()
1126 	constexpr Bitfield Red(int idx) const  in Red()
1130 	constexpr Bitfield Green(int idx) const  in Green()
1134 	constexpr Bitfield Blue(int idx) const  in Blue()
1138 	constexpr Bitfield Alpha(int idx) const  in Alpha()
1142 	constexpr Bitfield EndpointPBit(int idx) const  in EndpointPBit()
1146 	constexpr Bitfield SharedPBit0() const  in SharedPBit0()
1150 	constexpr Bitfield SharedPBit1() const  in SharedPBit1()
1154 	constexpr Bitfield PrimaryIndex(int offset, int count) const  in PrimaryIndex()
1158 	constexpr Bitfield SecondaryIndex(int offset, int count) const  in SecondaryIndex()