public Result CreateInstance(MgInstanceCreateInfo createInfo, IMgAllocationCallbacks allocator, out IMgInstance instance)
{
var allocatedItems = new List <IntPtr>();
try
{
uint enabledLayerCount;
var ppEnabledLayerNames = VkInteropsUtility.CopyStringArrays(allocatedItems, createInfo.EnabledLayerNames, out enabledLayerCount);
uint enabledExtensionCount;
var ppEnabledExtensionNames = VkInteropsUtility.CopyStringArrays(allocatedItems, createInfo.EnabledExtensionNames, out enabledExtensionCount);
var pApplicationInfo = IntPtr.Zero;
if (createInfo.ApplicationInfo != null)
{
var acInfo = new VkApplicationInfo
{
sType = VkStructureType.StructureTypeApplicationInfo,
pNext = IntPtr.Zero,
apiVersion = createInfo.ApplicationInfo.ApiVersion,
applicationVersion = createInfo.ApplicationInfo.ApplicationVersion,
engineVersion = createInfo.ApplicationInfo.EngineVersion,
pApplicationName = CopySingleString(allocatedItems, createInfo.ApplicationInfo.ApplicationName),
pEngineName = CopySingleString(allocatedItems, createInfo.ApplicationInfo.EngineName),
};
var destPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(VkApplicationInfo)));
allocatedItems.Add(destPtr);
Marshal.StructureToPtr(acInfo, destPtr, false);
pApplicationInfo = destPtr;
}
var ici = new VkInstanceCreateInfo
{
sType = VkStructureType.StructureTypeInstanceCreateInfo,
pNext = IntPtr.Zero,
enabledLayerCount = enabledLayerCount,
ppEnabledLayerNames = ppEnabledLayerNames,
enabledExtensionCount = enabledExtensionCount,
ppEnabledExtensionNames = ppEnabledExtensionNames,
pApplicationInfo = pApplicationInfo,
};
var bAllocator = allocator as MgVkAllocationCallbacks;
IntPtr allocatorPtr = bAllocator != null ? bAllocator.Handle : IntPtr.Zero;
IntPtr handle = IntPtr.Zero;
var result = Interops.vkCreateInstance(ref ici, allocatorPtr, ref handle);
instance = new VkInstance(handle);
return((Result)result);
}
finally
{
//foreach (var mem in allocatedItems)
//{
// Marshal.FreeHGlobal(mem);
//}
}
}