D3D12CalcSubresource function
Calculates a subresource index for a texture.
Syntax
UINT inline D3D12CalcSubresource(
UINT MipSlice,
UINT ArraySlice,
UINT PlaneSlice,
UINT MipLevels,
UINT ArraySize
);
Parameters
-
MipSlice
-
Type: UINT
The zero-based index for the mipmap level to address; 0 indicates the first, most detailed mipmap level.
-
ArraySlice
-
Type: UINT
The zero-based index for the array level to address; always use 0 for volume (3D) textures.
-
PlaneSlice
-
Type: UINT
The zero-based index for the plane level to address.
-
MipLevels
-
Type: UINT
The number of mipmap levels in the resource.
-
ArraySize
-
Type: UINT
The number of elements in the array.
Return value
Type: UINT
The index which equals MipSlice + (ArraySlice * MipLevels).
Remarks
A buffer is an unstructured resource and is therefore defined as containing a single subresource. APIs that take buffers do not need a subresource index. A texture on the other hand is highly structured. Each texture object may contain one or more subresources depending on the size of the array and the number of mipmap levels.
For volume (3D) textures, all slices for a given mipmap level are a single subresource index.
Requirements
| Requirement | Value |
|---|---|
| Header |
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| Library |
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| DLL |
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