internal Texture3D(Device device, Texture3DDescription description)
: base(device)
{
_description = description;
int mipMapCount = MipMapUtility.CalculateMipMapCount(description.MipLevels,
description.Width, description.Height, description.Depth);
_subresources = MipMapUtility.CreateMipMaps(mipMapCount,
description.Width, description.Height, description.Depth);
}