public IMgLogicalDevice CreateDevice(IMgPhysicalDevice gpu, IMgSurfaceKHR presentationSurface, MgQueueAllocation requestCount, MgQueueFlagBits requestedQueueType, string[] enabledExtensions)
{
// Find a queue that supports graphics operations
MgQueueFamilyProperties[] queueProps;
gpu.GetPhysicalDeviceQueueFamilyProperties(out queueProps);
Debug.Assert(queueProps != null);
Debug.Assert(queueProps.Length >= 1);
uint queueFamilyIndex = 0;
queueFamilyIndex = presentationSurface != null
? FindAppropriateQueueFamilyForSurface(gpu, presentationSurface, queueProps, requestedQueueType)
: FindAppropriateQueueFamily(queueProps, requestedQueueType);
uint noOfQueues = (requestCount == MgQueueAllocation.One) ? 1 : queueProps [queueFamilyIndex].QueueCount;
var queuePriorities = new float[noOfQueues];
for (uint i = 0; i < noOfQueues; ++i)
{
queuePriorities [i] = 0f;
}
var queueCreateInfo = new MgDeviceQueueCreateInfo {
QueueFamilyIndex = queueFamilyIndex,
QueueCount = noOfQueues,
QueuePriorities = queuePriorities,
};
return(CreateDevice(gpu, queueCreateInfo, enabledExtensions));
}
public IMgLogicalDevice CreateDevice(IMgPhysicalDevice gpu, MgDeviceQueueCreateInfo queueCreateInfo, string[] enabledExtensions)
{
if (gpu == null)
{
throw new ArgumentNullException(nameof(gpu));
}
if (queueCreateInfo == null)
{
throw new ArgumentNullException(nameof(queueCreateInfo));
}
var deviceCreateInfo = new MgDeviceCreateInfo {
EnabledExtensionNames = enabledExtensions,
QueueCreateInfos = new[] {
queueCreateInfo
},
};
IMgDevice device;
var errorCode = gpu.CreateDevice(deviceCreateInfo, null, out device);
Debug.Assert(errorCode == Result.SUCCESS, errorCode + " != Result.SUCCESS");
// Get the graphics queue
var availableQueues = new IMgQueueInfo[queueCreateInfo.QueueCount];
for (uint i = 0; i < queueCreateInfo.QueueCount; ++i)
{
IMgQueue queue;
device.GetDeviceQueue(queueCreateInfo.QueueFamilyIndex, i, out queue);
availableQueues [i] = new MgQueueInfo(i, gpu, device, queueCreateInfo.QueueFamilyIndex, queue);
}
return(new MgLogicalDevice(gpu, device, availableQueues));
}
