10 Enumerating available physical devices.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: 01 Instance and Devices
// Recipe:  10 Enumerating available physical devices

#include "01 Instance and Devices/10 Enumerating available physical devices.h"

namespace VulkanCookbook {

  bool EnumerateAvailablePhysicalDevices( VkInstance                      instance,
                                          std::vector<VkPhysicalDevice> & available_devices ) {
    uint32_t devices_count = 0;
    VkResult result = VK_SUCCESS;

    result = vkEnumeratePhysicalDevices( instance, &devices_count, nullptr );
    if( (result != VK_SUCCESS) ||
        (devices_count == 0) ) {
      std::cout << "Could not get the number of available physical devices." << std::endl;
      return false;
    }

    available_devices.resize( devices_count );
    result = vkEnumeratePhysicalDevices( instance, &devices_count, available_devices.data() );
    if( (result != VK_SUCCESS) ||
        (devices_count == 0) ) {
      std::cout << "Could not enumerate physical devices." << std::endl;
      return false;
    }

    return true;
  }

} // namespace VulkanCookbook