Parameters
- mipSlice
- A zero-based index for the mipmap level to address; 0 indicates the first, most detailed mipmap level.
- arraySlice
- The zero-based index for the array level to address; always use 0 for volume (3D) textures.
- mipLevel
- Number of mipmap levels in the resource.
Return Value
The index which equals MipSlice + (ArraySlice * MipLevels).