Vulkan Cookbook

How it works...

Samplers are destroyed like this:

if( VK_NULL_HANDLE != sampler ) { 
  vkDestroySampler( logical_device, sampler, nullptr ); 
  sampler = VK_NULL_HANDLE; 
}

We don't have to check whether the sampler's handle is not empty, because a deletion of a VK_NULL_HANDLE is ignored. We do this just to avoid an unnecessary function call. But when we delete a sampler, we must be sure that the handle (if not empty) is valid.