ID3D12GraphicsCommandList::ResolveSubresource method (d3d12.h)

Article
08/03/2021

Copy a multi-sampled resource into a non-multi-sampled resource.

Syntax

void ResolveSubresource(
  ID3D12Resource *pDstResource,
  UINT           DstSubresource,
  ID3D12Resource *pSrcResource,
  UINT           SrcSubresource,
  DXGI_FORMAT    Format
);

Parameters

pDstResource

Type: [in] ID3D12Resource*

Destination resource. Must be a created on a D3D12_HEAP_TYPE_DEFAULT heap and be single-sampled. See ID3D12Resource.

DstSubresource

Type: [in] UINT

A zero-based index, that identifies the destination subresource. Use D3D12CalcSubresource to calculate the subresource index if the parent resource is complex.

pSrcResource

Type: [in] ID3D12Resource*

Source resource. Must be multisampled.

SrcSubresource

Type: [in] UINT

The source subresource of the source resource.

Format

Type: [in] DXGI_FORMAT

A DXGI_FORMAT that indicates how the multisampled resource will be resolved to a single-sampled resource. See remarks.

Return value

None

Remarks

Debug layer

The debug layer will issue an error if the subresources referenced by the source view is not in the D3D12_RESOURCE_STATE_RESOLVE_SOURCE state.

The debug layer will issue an error if the destination buffer is not in the D3D12_RESOURCE_STATE_RESOLVE_DEST state.

The source and destination resources must be the same resource type and have the same dimensions. In addition, they must have compatible formats. There are three scenarios for this:

Scenario	Requirements
Source and destination are prestructured and typed	Both the source and destination must have identical formats and that format must be specified in the Format parameter.
One resource is prestructured and typed and the other is prestructured and typeless	The typed resource must have a format that is compatible with the typeless resource (i.e. the typed resource is DXGI_FORMAT_R32_FLOAT and the typeless resource is DXGI_FORMAT_R32_TYPELESS). The format of the typed resource must be specified in the Format parameter.
Source and destination are prestructured and typeless	Both the source and destination must have the same typeless format (i.e. both must have DXGI_FORMAT_R32_TYPELESS), and the Format parameter must specify a format that is compatible with the source and destination (i.e. if both are DXGI_FORMAT_R32_TYPELESS then DXGI_FORMAT_R32_FLOAT could be specified in the Format parameter). For example, given the DXGI_FORMAT_R16G16B16A16_TYPELESS format: The source (or dest) format could be DXGI_FORMAT_R16G16B16A16_UNORM The dest (or source) format could be DXGI_FORMAT_R16G16B16A16_FLOAT

Requirements

Requirement	Value
Target Platform	Windows
Header	d3d12.h
Library	D3d12.lib
DLL	D3d12.dll

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