DirectX 12 Documentation

ID3D12RootSignature Interface

Represents a root signature for Direct3D 12.

The root signature is a part of the pipeline state object (PSO) that defines the layout of the root signature, which is a collection of root parameters. Root parameters are a part of the root signature that can contain shader resource views (SRVs), unordered access views (UAVs), constant buffers, or sampler states. They can also contain a range of descriptors.

Interface Identifier

interface ID3D12RootSignature : public ID3D12DeviceChild;

Remarks

The root signature is a critical component in managing shader data binding in Direct3D 12. It allows for flexible and explicit control over how data is accessed by shaders. Instead of relying on implicit binding slots, the root signature defines the exact layout and types of resources that shaders can access.

Root signatures are created by calling ID3D12Device::CreateRootSignature. The creation process involves defining the root signature's structure using structures like D3D12_ROOT_SIGNATURE_DESC and an array of D3D12_ROOT_PARAMETER structures.

Methods

The ID3D12RootSignature interface inherits from ID3D12DeviceChild.

• GetDesc: Retrieves the description of the root signature.
• GetDevice: Gets the device associated with this object. (Inherited from ID3D12DeviceChild)

See Also

• D3D12_ROOT_SIGNATURE_DESC
• D3D12_ROOT_PARAMETER
• ID3D12Device::CreateRootSignature
• Direct3D 12 Core Structures

Requirements