public IMgLogicalDevice CreateLogicalDevice(
IMgSurfaceKHR presentationSurface,
MgDeviceExtensionOptions option,
MgQueueAllocation allocationUsage,
MgQueueFlagBits deviceUsage)
{
string[] extensions = null;
IMgPhysicalDevice[] physicalDevices;
var errorCode = mInstance.EnumeratePhysicalDevices(out physicalDevices);
Debug.Assert(errorCode == Result.SUCCESS, errorCode + " != Result.SUCCESS");
IMgPhysicalDevice firstPhysicalDevice = physicalDevices[0];
if (option == MgDeviceExtensionOptions.ALL)
{
MgExtensionProperties[] extensionProperties;
var err = firstPhysicalDevice.EnumerateDeviceExtensionProperties(null, out extensionProperties);
Debug.Assert(err == Result.SUCCESS, err + " != Result.SUCCESS");
var enabledExtensions = new List <string>();
if (extensionProperties != null)
{
foreach (var ext in extensionProperties)
{
enabledExtensions.Add(ext.ExtensionName);
}
}
extensions = enabledExtensions.ToArray();
}
return(CreateDevice(firstPhysicalDevice, presentationSurface, allocationUsage, deviceUsage, extensions));
}
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));
}