D3D11CalcSubresource function (d3d11.h)
Calculates a subresource index for a texture.
Syntax
UINT D3D11CalcSubresource(
UINT MipSlice,
UINT ArraySlice,
UINT MipLevels
);
Parameters
MipSlice
Type: UINT
A 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.
MipLevels
Type: UINT
Number of mipmap levels in the resource.
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 |
|---|---|
| Target Platform | Windows |
| Header | d3d11.h |
| DLL | D3d11.lib |