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 |