private unsafe QueueFamilyIndices FindQueueFamilies(PhysicalDevice device)
{
var indices = new QueueFamilyIndices();
uint queueFamilyCount = 0;
_vk.GetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, (QueueFamilyProperties *)null);
QueueFamilyProperties *queueFamilies = stackalloc QueueFamilyProperties[(int)queueFamilyCount];
_vk.GetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, queueFamilies);
for (uint i = 0; i < queueFamilyCount; i++)
{
QueueFamilyProperties queueFamily = queueFamilies[i];
if (queueFamily.QueueFlags.HasFlag(QueueFlags.QueueGraphicsBit))
{
indices.GraphicsFamily = i;
}
_vkSurface.GetPhysicalDeviceSurfaceSupport(device, i, _surface, out Bool32 presentSupport);
if (presentSupport == Vk.True)
{
indices.PresentFamily = i;
}
if (indices.IsComplete)
{
break;
}
}
return(indices);
}
private unsafe void CreateLogicalDevice()
{
QueueFamilyIndices indices = FindQueueFamilies(_physicalDevice);
uint[] uniqueQueueFamilies = new[] { indices.GraphicsFamily.Value, indices.PresentFamily.Value };
var queueCreateInfos = stackalloc DeviceQueueCreateInfo[uniqueQueueFamilies.Length];
float queuePriority = 1.0f;
for (int i = 0; i < uniqueQueueFamilies.Length; i++)
{
uint queueFamily = uniqueQueueFamilies[i];
var queueCreateInfo = new DeviceQueueCreateInfo
{
SType = StructureType.DeviceQueueCreateInfo,
QueueFamilyIndex = queueFamily,
QueueCount = 1,
PQueuePriorities = &queuePriority
};
queueCreateInfos[i] = queueCreateInfo;
}
var deviceFeatures = new PhysicalDeviceFeatures();
var createInfo = new DeviceCreateInfo
{
SType = StructureType.DeviceCreateInfo,
PQueueCreateInfos = queueCreateInfos,
QueueCreateInfoCount = (uint)uniqueQueueFamilies.Length,
PEnabledFeatures = &deviceFeatures,
EnabledExtensionCount = 0
};
if (EnableValidationLayers)
{
createInfo.EnabledLayerCount = (uint)_validationLayers.Length;
createInfo.PpEnabledLayerNames = (byte **)SilkMarshal.MarshalStringArrayToPtr(_validationLayers);
}
else
{
createInfo.EnabledLayerCount = 0;
}
fixed(Device *device = &_device)
{
Result result = _vk.CreateDevice(_physicalDevice, &createInfo, (AllocationCallbacks *)null, device);
if (result != Result.Success)
{
throw new Exception("Failed to create logical device!");
}
}
fixed(Queue *graphicsQueue = &_graphicsQueue)
{
_vk.GetDeviceQueue(_device, indices.GraphicsFamily.Value, 0, graphicsQueue);
}
fixed(Queue *presentQueue = &_presentQueue)
{
_vk.GetDeviceQueue(_device, indices.PresentFamily.Value, 0, presentQueue);
}
}
private unsafe bool IsDeviceSuitable(PhysicalDevice device)
{
QueueFamilyIndices indices = FindQueueFamilies(device);
return(indices.IsComplete);
}
