support present modes and jazz

main.mm

@@ -22,6 +22,7 @@ GLFWwindow* window;
 CAMetalLayer* layer;
 gnVersion version = gnCreateVersion(1, 0, 0);
 gnInstance instance;
+gnPhysicalDevice pysicalDevice;
 gnDevice device;
 gnSurface surface;
 
@@ -68,8 +69,16 @@ void createDevice() {
         std::cout << "Name: " << properties.deviceName << "\n";
     }
 
+    pysicalDevice = devices[0];
+
+    const char* extensions[1] = {
+        "GN_EXT_swapchain"
+    };
+
     gnDeviceCreateInfo createInfo = {
-        .physicalDevice = devices[0]
+        .physicalDevice = pysicalDevice,
+        .enabledExtensionCount = 1,
+        .enabledExtensions = extensions
     };
     CHECK(gnCreateDevice(instance, &createInfo, &device));
 }
@@ -85,7 +94,14 @@ void createSurface() {
     gnMetalSurfaceCreateInfo createInfo = {
         .metalLayer = layer
     };
-    CHECK(gnCreateMetalSurface(instance, &createInfo, &surface))
+    CHECK(gnCreateMetalSurface(instance, &createInfo, &surface));
+
+    gnSurfaceCapabilities capabilites;
+    gnGetSurfaceCapabilities(pysicalDevice, surface, &capabilites);
+}
+
+void createSwapchain() {
+
 }
 
 int main() {
@@ -105,6 +121,7 @@ int main() {
         createInstance();
         createDevice();
         createSurface();
+        createSwapchain();
         while (!glfwWindowShouldClose(window)) {
             glfwPollEvents();
         }