private unsafe void CreateInstance()
{
_vk = Vk.GetApi();
if (EnableValidationLayers && !CheckValidationLayerSupport())
{
throw new NotSupportedException("Validation layers requested but not available!");
}
var appInfo = new ApplicationInfo
{
SType = StructureType.ApplicationInfo,
PApplicationName = (byte *)Marshal.StringToHGlobalAnsi("Hello Triangle"),
ApplicationVersion = Vk.MakeVersion(1, 0),
PEngineName = (byte *)Marshal.StringToHGlobalAnsi("No Engine"),
EngineVersion = Vk.MakeVersion(1, 0),
ApiVersion = Vk.Version11
};
var extensions = (byte **)_window.VkSurface.GetRequiredExtensions(out var extCount);
byte **newExtensions = stackalloc byte *[(int)(extCount + _instanceExtensions.Length)];
for (int i = 0; i < extCount; i++)
{
newExtensions[i] = extensions[i];
}
for (var i = 0; i < _instanceExtensions.Length; i++)
{
newExtensions[extCount + i] = (byte *)SilkMarshal.MarshalStringToPtr(_instanceExtensions[i]);
}
extCount += (uint)_instanceExtensions.Length;
var createInfo = new InstanceCreateInfo
{
SType = StructureType.InstanceCreateInfo,
PApplicationInfo = &appInfo,
EnabledExtensionCount = extCount,
PpEnabledExtensionNames = newExtensions
};
// debug info is here to make sure it doesnt get destroyed before vk.CreateInstance
var debugCreateInfo = new DebugUtilsMessengerCreateInfoEXT();
if (EnableValidationLayers)
{
createInfo.EnabledLayerCount = (uint)_validationLayers.Length;
createInfo.PpEnabledLayerNames = (byte **)SilkMarshal.MarshalStringArrayToPtr(_validationLayers);
createInfo.PNext = &debugCreateInfo;
}
else
{
createInfo.EnabledLayerCount = 0;
createInfo.PNext = null;
}
fixed(Instance *instance = &_instance)
{
Result result = _vk.CreateInstance(&createInfo, null, instance);
if (result != Result.Success)
{
throw new Exception("Failed to create instance!");
}
}
_vk.CurrentInstance = _instance;
if (!_vk.TryGetInstanceExtension(_instance, out _vkSurface))
{
throw new NotSupportedException("KHR_surface extensions not found");
}
}