Vulkan-Hpp/samples/PhysicalDeviceGroups/PhysicalDeviceGroups.cpp

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// Copyright(c) 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 : PhysicalDeviceGroups
// Get the PhysicalDeviceGroups.
#include "../utils/utils.hpp"
#include "vulkan/vulkan.hpp"
#include <vector>
static char const * AppName = "PhysicalDeviceGroups";
static char const * EngineName = "Vulkan.hpp";
int main( int /*argc*/, char ** /*argv*/ )
{
try
{
vk::Instance instance = vk::su::createInstance( AppName, EngineName, {}, {}, VK_API_VERSION_1_1 );
#if !defined( NDEBUG )
vk::DebugUtilsMessengerEXT debugUtilsMessenger =
instance.createDebugUtilsMessengerEXT( vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
#endif
/* VULKAN_KEY_START */
std::vector<vk::PhysicalDeviceGroupProperties> groupProperties = instance.enumeratePhysicalDeviceGroups();
std::cout << std::boolalpha;
for ( size_t i = 0; i < groupProperties.size(); i++ )
{
std::cout << "Group Properties " << i << "\n";
std::cout << "\t"
<< "physicalDeviceCount = " << groupProperties[i].physicalDeviceCount << "\n";
std::cout << "\t"
<< "physicalDevices:\n";
for ( size_t j = 0; j < groupProperties[i].physicalDeviceCount; j++ )
{
std::cout << "\t\t" << j << " : " << groupProperties[i].physicalDevices[j].getProperties().deviceName << "\n";
}
std::cout << "\t"
<< "subsetAllocation = " << !!groupProperties[i].subsetAllocation << "\n";
std::cout << "\n";
if ( 1 < groupProperties[i].physicalDeviceCount )
{
vk::PhysicalDevice physicalDevice = groupProperties[i].physicalDevices[0];
// get the QueueFamilyProperties of the first PhysicalDevice
std::vector<vk::QueueFamilyProperties> queueFamilyProperties = physicalDevice.getQueueFamilyProperties();
// get the first index into queueFamiliyProperties which supports graphics
auto propertyIterator = std::find_if(
queueFamilyProperties.begin(), queueFamilyProperties.end(), []( vk::QueueFamilyProperties const & qfp ) {
return qfp.queueFlags & vk::QueueFlagBits::eGraphics;
} );
size_t graphicsQueueFamilyIndex = std::distance( queueFamilyProperties.begin(), propertyIterator );
assert( graphicsQueueFamilyIndex < queueFamilyProperties.size() );
// create a Device
float queuePriority = 0.0f;
vk::DeviceQueueCreateInfo deviceQueueCreateInfo(
vk::DeviceQueueCreateFlags(), static_cast<uint32_t>( graphicsQueueFamilyIndex ), 1, &queuePriority );
vk::DeviceCreateInfo deviceCreateInfo( vk::DeviceCreateFlags(), deviceQueueCreateInfo );
vk::DeviceGroupDeviceCreateInfo deviceGroupDeviceCreateInfo( groupProperties[i].physicalDeviceCount,
groupProperties[i].physicalDevices );
deviceCreateInfo.pNext = &deviceGroupDeviceCreateInfo;
vk::Device device = physicalDevice.createDevice( deviceCreateInfo );
// ... and destroy it again
device.destroy();
}
}
/* VULKAN_KEY_END */
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#if !defined( NDEBUG )
instance.destroyDebugUtilsMessengerEXT( debugUtilsMessenger );
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#endif
instance.destroy();
}
catch ( vk::SystemError & err )
{
std::cout << "vk::SystemError: " << err.what() << std::endl;
exit( -1 );
}
catch ( std::exception & err )
{
std::cout << "std::exception: " << err.what() << std::endl;
exit( -1 );
}
catch ( ... )
{
std::cout << "unknown error\n";
exit( -1 );
}
return 0;
}