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# D3D12_DESCRIPTOR_RANGE

> Describes a descriptor range.

Describes a descriptor range.

## Syntax

```cpp theme={null}
typedef struct D3D12_DESCRIPTOR_RANGE
{
    D3D12_DESCRIPTOR_RANGE_TYPE RangeType;
    UINT NumDescriptors;
    UINT BaseShaderRegister;
    UINT RegisterSpace;
    UINT OffsetInDescriptorsFromTableStart;
} D3D12_DESCRIPTOR_RANGE
```

### Members

*RangeType*\
Type: D3D12\_DESCRIPTOR\_RANGE\_TYPE

A [D3D12\_DESCRIPTOR\_RANGE\_TYPE](/reference/graphics/d3d12/enums/d3d12_descriptor_range_type_public)-typed value that specifies the type of descriptor range.

*NumDescriptors*\
Type: UINT

The number of descriptors in the range. Use -1 or UINT\_MAX to specify an unbounded size. If a given descriptor range is unbounded, then it must either be the last range in the table definition, or else the following range in the table definition must have a value for *OffsetInDescriptorsFromTableStart* that is not **D3D12\_DESCRIPTOR\_RANGE\_OFFSET\_APPEND**.

*BaseShaderRegister*\
Type: UINT

The base shader register in the range. For example, for shader-resource views (SRVs), 3 maps to ": register(t3);" in HLSL.

*RegisterSpace*\
Type: UINT

The register space. Can typically be 0, but allows multiple descriptor  arrays of unknown size to not appear to overlap.
For example, for SRVs, by extending the example in the **BaseShaderRegister** member description, 5 maps to ": register(t3,space5);" in HLSL.

*OffsetInDescriptorsFromTableStart*\
Type: UINT

The offset in descriptors, from the start of the descriptor table which was set as the root argument value for this parameter slot. This value can be **D3D12\_DESCRIPTOR\_RANGE\_OFFSET\_APPEND**, which indicates this range should immediately follow the preceding range.

## Remarks

This structure is a member of the [D3D12\_ROOT\_DESCRIPTOR\_TABLE](/reference/graphics/d3d12/structs/d3d12_root_descriptor_table_public) structure.

## Requirements

**Header:** d3d12\_xs.h or d3d12\_x.h\
**Library:** d3d12\_xs.lib or d3d12\_x.lib\
**Supported Platforms**: XBOX Series consoles and XBOX One family

## See Also

[CD3DX12\_DESCRIPTOR\_RANGE](https://learn.microsoft.com/en-us/windows/desktop/direct3d12/cd3dx12-descriptor-range)

[Core Structures](https://learn.microsoft.com/en-us/windows/desktop/direct3d12/direct3d-12-structures)


## Related topics

- [D3D12_DESCRIPTOR_RANGE_TYPE](/reference/graphics/d3d12/enums/d3d12_descriptor_range_type_public.md)
- [D3D12_ROOT_DESCRIPTOR_TABLE](/reference/graphics/d3d12/structs/d3d12_root_descriptor_table_public.md)
- [D3D12_DESCRIPTOR_RANGE_FLAGS](/reference/graphics/d3d12/enums/d3d12_descriptor_range_flags_public.md)
- [D3D12_DESCRIPTOR_RANGE1](/reference/graphics/d3d12/structs/d3d12_descriptor_range1_public.md)
- [D3D12_ROOT_DESCRIPTOR_FLAGS](/reference/graphics/d3d12/enums/d3d12_root_descriptor_flags_public.md)