Allocating descriptor sets

Descriptor sets gather shader resources (descriptors) in one container object. Its contents, types, and number of resources are defined by a descriptor set layout; storage is taken from pools, from which we can allocate descriptor sets.

How to do it...

1. Take the logical device and store its handle in a variable of type VkDevice named logical_device.
2. Prepare a descriptor pool from which descriptor sets should be allocated. Use the pool's handle to initialize a variable of type VkDescriptorPool named descriptor_pool.
3. Create a variable of type std::vector<VkDescriptorSetLayout> named descriptor_set_layouts. For each descriptor set that should be allocated from the pool, add a handle of a descriptor set layout that defines the structure of a corresponding descriptor set.
4. Create a variable of type VkDescriptorSetAllocateInfo named descriptor_set_allocate_info and use the following values for its members:
   • VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO value for sType
   • nullptr...