Creating a descriptor pool

Descriptors, gathered into sets, are allocated from descriptor pools. When we create a pool, we must define which descriptors, and how many of them, can be allocated from the created pool.

How to do it...

1. Take the handle of a logical device on which the descriptor pool should be created. Store it in a variable of type VkDevice named logical_device.
2. Create a vector variable named descriptor_types with elements of type VkDescriptorPoolSize. For each type of descriptor that will be allocated from the pool, add a new element to the descriptor_types variable defining the specified type of descriptor and the number of descriptors of a given type that will be allocated from the pool.
3. Create a variable of type VkDescriptorPoolCreateInfo named descriptor_pool_create_info. Use the following values for members of this variable:
   • VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO value for sType
   • nullptr value for pNext
   • VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT value if it should...