Destroying a swapchain

When we are done using a swapchain, because we don't want to present images any more, or because we are just closing our application, we should destroy it. We need to destroy it before we destroy a presentation surface which was used during a given swapchain creation.

How to do it...

1. Take the handle of a logical device and store it in a variable of type VkDevice named logical_device.
2. Take the handle of a swapchain object that needs to be destroyed. Store it in a variable of type VkSwapchainKHR named swapchain.
3. Call vkDestroySwapchainKHR( logical_device, swapchain, nullptr ) and provide the logical_device variable as the first argument and the swapchain handle as the second argument. Set the last parameter to nullptr.
4. For safety reasons, assign a VK_NULL_HANDLE value to the swapchain variable.

How it works...

To destroy a swapchain, we can prepare code that is similar to the following example:

if( swapchain ) { 
  vkDestroySwapchainKHR( logical_device, swapchain, nullptr )...