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# D3D12_ROOT_PARAMETER1

> Describes the slot of a root signature version 1.1.

Describes the slot of a root signature version 1.1.

## Syntax

```cpp theme={null}
typedef struct D3D12_ROOT_PARAMETER1
{
    D3D12_ROOT_PARAMETER_TYPE ParameterType;
    D3D12_ROOT_DESCRIPTOR_TABLE1 DescriptorTable;
    D3D12_ROOT_CONSTANTS Constants;
    D3D12_ROOT_DESCRIPTOR1 Descriptor;
    D3D12_SHADER_VISIBILITY ShaderVisibility;
} D3D12_ROOT_PARAMETER1
```

### Members

*ParameterType*\
Type: D3D12\_ROOT\_PARAMETER\_TYPE

A [D3D12\_ROOT\_PARAMETER\_TYPE](/reference/graphics/d3d12/enums/d3d12_root_parameter_type_public)-typed value that  specifies the type of root signature slot. This member determines which type to use in the union below.

*DescriptorTable*\
Type: D3D12\_ROOT\_DESCRIPTOR\_TABLE1

A [D3D12\_ROOT\_DESCRIPTOR\_TABLE1](/reference/graphics/d3d12/structs/d3d12_root_descriptor_table1_public) structure that describes the layout of a descriptor table as a collection of descriptor ranges that appear one after the other in a descriptor heap.

*Constants*\
Type: D3D12\_ROOT\_CONSTANTS

A [D3D12\_ROOT\_CONSTANTS](/reference/graphics/d3d12/structs/d3d12_root_constants_public) structure that describes constants inline in the root signature that appear in shaders as one constant buffer.

*Descriptor*\
Type: D3D12\_ROOT\_DESCRIPTOR1

A [D3D12\_ROOT\_DESCRIPTOR1](/reference/graphics/d3d12/structs/d3d12_root_descriptor1_public) structure that describes descriptors inline in the root signature that appear in shaders.

*ShaderVisibility*\
Type: D3D12\_SHADER\_VISIBILITY

A [D3D12\_SHADER\_VISIBILITY](/reference/graphics/d3d12/enums/d3d12_shader_visibility_public)-typed value that  specifies the shaders that can access the contents of the root signature slot.

## Remarks

Use this structure with the [D3D12\_ROOT\_SIGNATURE\_DESC1](/reference/graphics/d3d12/structs/d3d12_root_signature_desc1_public) structure.

Refer to the helper structure [CD3DX12\_ROOT\_PARAMETER1](https://learn.microsoft.com/en-us/windows/desktop/direct3d12/cd3dx12-root-parameter1).

## 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

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

[D3D12\_ROOT\_PARAMETER](/reference/graphics/d3d12/structs/d3d12_root_parameter_public)

[Root Signature Version 1.1](https://learn.microsoft.com/en-us/windows/desktop/direct3d12/root-signature-version-1-1)


## Related topics

- [D3D12_ROOT_DESCRIPTOR1](/reference/graphics/d3d12/structs/d3d12_root_descriptor1_public.md)
- [D3D12_ROOT_DESCRIPTOR_TABLE1](/reference/graphics/d3d12/structs/d3d12_root_descriptor_table1_public.md)
- [D3D12_ROOT_PARAMETER](/reference/graphics/d3d12/structs/d3d12_root_parameter_public.md)
- [D3D12_ROOT_SIGNATURE_DESC1](/reference/graphics/d3d12/structs/d3d12_root_signature_desc1_public.md)
- [D3D12_ROOT_DESCRIPTOR](/reference/graphics/d3d12/structs/d3d12_root_descriptor_public.md)