static VkDevice CreateLogicalDevice(VkPhysicalDeviceFeatures enabledFeatures, CStringList enabledExtensions,
bool useSwapChain = true, VkQueueFlags requestedQueueTypes = VkQueueFlags.Graphics | VkQueueFlags.Compute | VkQueueFlags.Transfer)
{
using Vector <VkDeviceQueueCreateInfo> queueCreateInfos = new Vector <VkDeviceQueueCreateInfo>();
float defaultQueuePriority = 0.0f;
// Graphics queue
if ((requestedQueueTypes & VkQueueFlags.Graphics) != 0)
{
QFGraphics = GetQueueFamilyIndex(VkQueueFlags.Graphics);
var queueInfo = new VkDeviceQueueCreateInfo
{
sType = VkStructureType.DeviceQueueCreateInfo,
queueFamilyIndex = QFGraphics,
queueCount = 1,
pQueuePriorities = &defaultQueuePriority
};
queueCreateInfos.Add(queueInfo);
}
else
{
QFGraphics = (uint)IntPtr.Zero;
}
// Dedicated compute queue
if ((requestedQueueTypes & VkQueueFlags.Compute) != 0)
{
QFCompute = GetQueueFamilyIndex(VkQueueFlags.Compute);
if (QFCompute != QFGraphics)
{
// If compute family index differs, we need an additional queue create info for the compute queue
var queueInfo = new VkDeviceQueueCreateInfo
{
sType = VkStructureType.DeviceQueueCreateInfo,
queueFamilyIndex = QFCompute,
queueCount = 1,
pQueuePriorities = &defaultQueuePriority
};
queueCreateInfos.Add(queueInfo);
}
}
else
{
// Else we use the same queue
QFCompute = QFGraphics;
}
// Dedicated transfer queue
if ((requestedQueueTypes & VkQueueFlags.Transfer) != 0)
{
QFTransfer = GetQueueFamilyIndex(VkQueueFlags.Transfer);
if (QFTransfer != QFGraphics && QFTransfer != QFCompute)
{
// If compute family index differs, we need an additional queue create info for the transfer queue
var queueInfo = new VkDeviceQueueCreateInfo
{
sType = VkStructureType.DeviceQueueCreateInfo,
queueFamilyIndex = QFTransfer,
queueCount = 1,
pQueuePriorities = &defaultQueuePriority
};
queueCreateInfos.Add(queueInfo);
}
}
else
{
// Else we use the same queue
QFTransfer = QFGraphics;
}
// Create the logical device representation
using CStringList deviceExtensions = new CStringList(enabledExtensions);
if (useSwapChain)
{
// If the device will be used for presenting to a display via a swapchain we need to request the swapchain extension
deviceExtensions.Add(Vulkan.KHRSwapchainExtensionName);
}
var deviceCreateInfo = new VkDeviceCreateInfo
{
sType = VkStructureType.DeviceCreateInfo,
queueCreateInfoCount = queueCreateInfos.Count,
pQueueCreateInfos = queueCreateInfos.DataPtr,
pEnabledFeatures = &enabledFeatures
};
if (deviceExtensions.Count > 0)
{
deviceCreateInfo.enabledExtensionCount = deviceExtensions.Count;
deviceCreateInfo.ppEnabledExtensionNames = (byte **)deviceExtensions.Data;
}
return(Vulkan.CreateDevice(PhysicalDevice, &deviceCreateInfo));
}