Vulkan-Hpp/samples/04_InitCommandBuffer/04_InitCommandBuffer.cpp

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// Copyright(c) 2018, 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 : 04_InitCommandBuffer
// Create command buffer
#include "vulkan/vulkan.hpp"
#include <iostream>
static char const* AppName = "04_InitCommandBuffer";
static char const* EngineName = "Vulkan.hpp";
int main(int argc, char *argv[])
{
try
{
vk::ApplicationInfo appInfo(AppName, 1, EngineName, 1, VK_API_VERSION_1_1);
vk::UniqueInstance instance = vk::createInstanceUnique(vk::InstanceCreateInfo({}, &appInfo));
std::vector<vk::PhysicalDevice> physicalDevices = instance->enumeratePhysicalDevices();
assert(!physicalDevices.empty());
std::vector<vk::QueueFamilyProperties> queueFamilyProperties = physicalDevices[0].getQueueFamilyProperties();
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());
float queuePriority = 0.0f;
vk::DeviceQueueCreateInfo deviceQueueCreateInfo({}, static_cast<uint32_t>(graphicsQueueFamilyIndex), 1, &queuePriority);
vk::UniqueDevice device = physicalDevices[0].createDeviceUnique(vk::DeviceCreateInfo({}, 1, &deviceQueueCreateInfo));
/* VULKAN_HPP_KEY_START */
// create a UniqueCommandPool to allocate a CommandBuffer from
vk::UniqueCommandPool commandPool = device->createCommandPoolUnique(vk::CommandPoolCreateInfo(vk::CommandPoolCreateFlags(), deviceQueueCreateInfo.queueFamilyIndex));
// allocate a CommandBuffer from the CommandPool
std::vector<vk::UniqueCommandBuffer> commandBuffers = device->allocateCommandBuffersUnique(vk::CommandBufferAllocateInfo(commandPool.get(), vk::CommandBufferLevel::ePrimary, 1));
// Note: No need to explicitly free the CommandBuffer or destroy the CommandPool, as the corresponding free and destroy
// functions are called by the destructor of the UniqueCommandBuffer and the UniqueCommandPool 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;
}