Vulkan-Hpp/samples/03_InitDevice/03_InitDevice.cpp

// Copyright(c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// VulkanHpp Samples : 03_InitDevice
//                     Create and destroy a device

#include "../utils/utils.hpp"
#include "vulkan/vulkan.hpp"
#include <iostream>

static char const* AppName = "03_InitDevice";
static char const* EngineName = "Vulkan.hpp";

int main(int /*argc*/, char ** /*argv*/)
{
  try
  {
    vk::UniqueInstance instance = vk::su::createInstance(AppName, EngineName);
#if !defined(NDEBUG)
    vk::UniqueDebugReportCallbackEXT debugReportCallback = vk::su::createDebugReportCallback(instance);
#endif

    std::vector<vk::PhysicalDevice> physicalDevices = instance->enumeratePhysicalDevices();
    assert(!physicalDevices.empty());

    /* VULKAN_HPP_KEY_START */

    // get the QueueFamilyProperties of the first PhysicalDevice
    std::vector<vk::QueueFamilyProperties> queueFamilyProperties = physicalDevices[0].getQueueFamilyProperties();

    // get the first index into queueFamiliyProperties which supports graphics
    size_t graphicsQueueFamilyIndex = std::distance(queueFamilyProperties.begin(),
                                                    std::find_if(queueFamilyProperties.begin(),
                                                                 queueFamilyProperties.end(),
                                                                 [](vk::QueueFamilyProperties const& qfp) { return qfp.queueFlags & vk::QueueFlagBits::eGraphics; }));
    assert(graphicsQueueFamilyIndex < queueFamilyProperties.size());

    // create a UniqueDevice
    float queuePriority = 0.0f;
    vk::DeviceQueueCreateInfo deviceQueueCreateInfo(vk::DeviceQueueCreateFlags(), static_cast<uint32_t>(graphicsQueueFamilyIndex), 1, &queuePriority);
    vk::UniqueDevice device = physicalDevices[0].createDeviceUnique(vk::DeviceCreateInfo(vk::DeviceCreateFlags(), 1, &deviceQueueCreateInfo));

    // Note: No need to explicitly destroy the device, as the corresponding destroy function is
    // called by the destructor of the UniqueDevice on leaving this scope.

    /* VULKAN_HPP_KEY_END */
  }
  catch (vk::SystemError err)
  {
    std::cout << "vk::SystemError: " << err.what() << std::endl;
    exit(-1);
  }
  catch (...)
  {
    std::cout << "unknown error\n";
    exit(-1);
  }
  return 0;
}