D3D12_SHADER_COMPONENT_MAPPING

typedef enum D3D12_SHADER_COMPONENT_MAPPING
{
    D3D12_SHADER_COMPONENT_MAPPING_FROM_MEMORY_COMPONENT_0 = 0,
    D3D12_SHADER_COMPONENT_MAPPING_FROM_MEMORY_COMPONENT_1 = 1,
    D3D12_SHADER_COMPONENT_MAPPING_FROM_MEMORY_COMPONENT_2 = 2,
    D3D12_SHADER_COMPONENT_MAPPING_FROM_MEMORY_COMPONENT_3 = 3,
    D3D12_SHADER_COMPONENT_MAPPING_FORCE_VALUE_0 = 4,
    D3D12_SHADER_COMPONENT_MAPPING_FORCE_VALUE_1 = 5
} D3D12_SHADER_COMPONENT_MAPPING

#define D3D12_SHADER_COMPONENT_MAPPING_MASK 0x7
#define D3D12_SHADER_COMPONENT_MAPPING_SHIFT 3
#define D3D12_SHADER_COMPONENT_MAPPING_ALWAYS_SET_BIT_AVOIDING_ZEROMEM_MISTAKES \
(1<<(D3D12_SHADER_COMPONENT_MAPPING_SHIFT*4))
#define D3D12_ENCODE_SHADER_4_COMPONENT_MAPPING(Src0,Src1,Src2,Src3) \
((((Src0)&D3D12_SHADER_COMPONENT_MAPPING_MASK)| \
(((Src1)&D3D12_SHADER_COMPONENT_MAPPING_MASK)<<D3D12_SHADER_COMPONENT_MAPPING_SHIFT)| \
(((Src2)&D3D12_SHADER_COMPONENT_MAPPING_MASK)<<(D3D12_SHADER_COMPONENT_MAPPING_SHIFT*2))| \
(((Src3)&D3D12_SHADER_COMPONENT_MAPPING_MASK)<<(D3D12_SHADER_COMPONENT_MAPPING_SHIFT*3))| \
D3D12_SHADER_COMPONENT_MAPPING_ALWAYS_SET_BIT_AVOIDING_ZEROMEM_MISTAKES))
#define D3D12_DECODE_SHADER_4_COMPONENT_MAPPING(ComponentToExtract,Mapping) \
((D3D12_SHADER_COMPONENT_MAPPING)(Mapping >> (D3D12_SHADER_COMPONENT_MAPPING_SHIFT*ComponentToExtract) & D3D12_SHADER_COMPONENT_MAPPING_MASK))
#define D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING D3D12_ENCODE_SHADER_4_COMPONENT_MAPPING(0,1,2,3)