private unsafe void CreateInstance(IVkSurface vkSurface, string[] requestedExtensions, string[]?validationLayers, out Instance instance)
{
nint applicationName = Info.ApplicationName.Marshal();
nint engineName = Info.EngineName.Marshal();
ApplicationInfo applicationInfo = new ApplicationInfo
{
SType = StructureType.ApplicationInfo,
PApplicationName = (byte *)applicationName,
ApplicationVersion = Info.ApplicationVersion,
PEngineName = (byte *)engineName,
EngineVersion = Info.EngineVersion,
ApiVersion = Info.APIVersion
};
string[] requiredExtensions = VKAPI.GetRequiredExtensions(vkSurface, requestedExtensions);
nint requiredExtensionsPointer = SilkMarshal.StringArrayToPtr(requiredExtensions);
nint enabledLayerNames = 0x0;
int enabledLayerCount = 0;
InstanceCreateInfo createInfo = new InstanceCreateInfo
{
SType = StructureType.InstanceCreateInfo,
PApplicationInfo = &applicationInfo,
PpEnabledExtensionNames = (byte **)requiredExtensionsPointer,
EnabledExtensionCount = (uint)requiredExtensions.Length,
PpEnabledLayerNames = (byte **)null !,
EnabledLayerCount = 0,
PNext = (void *)null !
};
if (validationLayers is not null)
{
VKAPI.VerifyValidationLayerSupport(VK, validationLayers);
enabledLayerNames = SilkMarshal.StringArrayToPtr(validationLayers);
enabledLayerCount = validationLayers.Length;
createInfo.PpEnabledLayerNames = (byte **)enabledLayerNames;
createInfo.EnabledLayerCount = (uint)enabledLayerCount;
}
Log.Information(string.Format(FormatHelper.DEFAULT_LOGGING, nameof(VulkanInstance), "allocating instance."));
Result result = VK.CreateInstance(&createInfo, (AllocationCallbacks *)null !, out instance);
if (result is not Result.Success)
{
throw new VulkanException(result, "Failed to create Vulkan instance.");
}
SilkMarshal.FreeString(applicationName);
SilkMarshal.FreeString(engineName);
SilkMarshal.FreeString(requiredExtensionsPointer);
if (enabledLayerNames is not 0x0 && enabledLayerCount is not 0)
{
SilkMarshal.FreeString(enabledLayerNames);
}
}
void CreateInstance()
{
var appName = new InteropString("Hello Triangle");
var appInfo = new VkApplicationInfo();
appInfo.sType = CSGL.Vulkan.VkStructureType.ApplicationInfo;
appInfo.pApplicationName = appName.Address;
appInfo.applicationVersion = new CSGL.Vulkan.VkVersion(1, 0, 0);
appInfo.engineVersion = new CSGL.Vulkan.VkVersion(0, 0, 1);
appInfo.apiVersion = new CSGL.Vulkan.VkVersion(1, 0, 0);
var appInfoNative = new Native <VkApplicationInfo>(appInfo);
var info = new VkInstanceCreateInfo();
info.sType = CSGL.Vulkan.VkStructureType.InstanceCreateInfo;
info.pApplicationInfo = appInfoNative.Address;
var extensions = GLFW.GetRequiredInstanceExceptions();
var extensionsNative = new NativeStringArray(extensions);
info.ppEnabledExtensionNames = extensionsNative.Address;
info.enabledExtensionCount = (uint)extensions.Count;
var layersNative = new NativeStringArray(layers);
info.ppEnabledLayerNames = layersNative.Address;
info.enabledLayerCount = (uint)layers.Length;
var result = VK.CreateInstance(ref info, alloc, out instance);
appName.Dispose();
appInfoNative.Dispose();
extensionsNative.Dispose();
layersNative.Dispose();
}