12 Allocating descriptor sets.cpp

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// Vulkan Cookbook
// ISBN: 9781786468154
// © Packt Publishing Limited
//
// Author:   Pawel Lapinski
// LinkedIn: https://www.linkedin.com/in/pawel-lapinski-84522329
//
// Chapter: 05 Descriptor Sets
// Recipe:  12 Allocating descriptor sets

#include "05 Descriptor Sets/12 Allocating descriptor sets.h"

namespace VulkanCookbook {

  bool AllocateDescriptorSets( VkDevice                                   logical_device,
                               VkDescriptorPool                           descriptor_pool,
                               std::vector<VkDescriptorSetLayout> const & descriptor_set_layouts,
                               std::vector<VkDescriptorSet>             & descriptor_sets ) {
    if( descriptor_set_layouts.size() > 0 ) {
      VkDescriptorSetAllocateInfo descriptor_set_allocate_info = {
        VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO,         // VkStructureType                  sType
        nullptr,                                                // const void                     * pNext
        descriptor_pool,                                        // VkDescriptorPool                 descriptorPool
        static_cast<uint32_t>(descriptor_set_layouts.size()),   // uint32_t                         descriptorSetCount
        descriptor_set_layouts.data()                           // const VkDescriptorSetLayout    * pSetLayouts
      };

      descriptor_sets.resize( descriptor_set_layouts.size() );

      VkResult result = vkAllocateDescriptorSets( logical_device, &descriptor_set_allocate_info, descriptor_sets.data() );
      if( VK_SUCCESS != result ) {
        std::cout << "Could not allocate descriptor sets." << std::endl;
        return false;
      }
      return true;
    }
    return false;
  }

} // namespace VulkanCookbook