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

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// 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;
}