D3D12_INPUT_ELEMENT_DESC structure (d3d12.h)

Describes a single element for the input-assembler stage of the graphics pipeline.

Syntax

typedef struct D3D12_INPUT_ELEMENT_DESC {
  LPCSTR                     SemanticName;
  UINT                       SemanticIndex;
  DXGI_FORMAT                Format;
  UINT                       InputSlot;
  UINT                       AlignedByteOffset;
  D3D12_INPUT_CLASSIFICATION InputSlotClass;
  UINT                       InstanceDataStepRate;
} D3D12_INPUT_ELEMENT_DESC;

Members

SemanticName

The HLSL semantic associated with this element in a shader input-signature. See HLSL Semantics for more info.

SemanticIndex

The semantic index for the element. A semantic index modifies a semantic, with an integer index number. A semantic index is only needed in a case where there is more than one element with the same semantic. For example, a 4x4 matrix would have four components each with the semantic name matrix, however each of the four component would have different semantic indices (0, 1, 2, and 3).

Format

A DXGI_FORMAT-typed value that specifies the format of the element data.

InputSlot

An integer value that identifies the input-assembler. For more info, see Input Slots. Valid values are between 0 and 15.

AlignedByteOffset

Optional. Offset, in bytes, to this element from the start of the vertex. Use D3D12_APPEND_ALIGNED_ELEMENT (0xffffffff) for convenience to define the current element directly after the previous one, including any packing if necessary.

InputSlotClass

A value that identifies the input data class for a single input slot.

InstanceDataStepRate

The number of instances to draw using the same per-instance data before advancing in the buffer by one element. This value must be 0 for an element that contains per-vertex data (the slot class is set to the D3D12_INPUT_PER_VERTEX_DATA member of D3D12_INPUT_CLASSIFICATION).

Remarks

This structure is a member of the D3D12_INPUT_LAYOUT_DESC structure. A pipeline state object contains a input-layout structure that defines one element being read from an input slot.

Requirements

Requirement	Value
Header	d3d12.h

See also

Core Structures