Ch04LogicalDevice.diff

diff --git "a/G:\\Java-Dev\\Vulkan-Tutorial-Java\\src\\main\\java\\javavulkantutorial\\Ch03PhysicalDeviceSelection.java" "b/G:\\Java-Dev\\Vulkan-Tutorial-Java\\src\\main\\java\\javavulkantutorial\\Ch04LogicalDevice.java"
index a6e48df..10d7127 100644
--- "a/G:\\Java-Dev\\Vulkan-Tutorial-Java\\src\\main\\java\\javavulkantutorial\\Ch03PhysicalDeviceSelection.java"
+++ "b/G:\\Java-Dev\\Vulkan-Tutorial-Java\\src\\main\\java\\javavulkantutorial\\Ch04LogicalDevice.java"
@@ -20,7 +20,7 @@ import static org.lwjgl.system.MemoryUtil.NULL;
 import static org.lwjgl.vulkan.EXTDebugUtils.*;
 import static org.lwjgl.vulkan.VK10.*;
 
-public class Ch03PhysicalDeviceSelection {
+public class Ch04LogicalDevice {
 
     private static class HelloTriangleApplication {
 
@@ -84,6 +84,8 @@ public class Ch03PhysicalDeviceSelection {
         private VkInstance instance;
         private long debugMessenger;
         private VkPhysicalDevice physicalDevice;
+        private VkDevice device;
+        private VkQueue graphicsQueue;
 
         // ======= METHODS ======= //
 
@@ -116,6 +118,7 @@ public class Ch03PhysicalDeviceSelection {
             createInstance();
             setupDebugMessenger();
             pickPhysicalDevice();
+            createLogicalDevice();
         }
 
         private void mainLoop() {
@@ -128,6 +131,8 @@ public class Ch03PhysicalDeviceSelection {
 
         private void cleanup() {
 
+            vkDestroyDevice(device, null);
+
             if(ENABLE_VALIDATION_LAYERS) {
                 destroyDebugUtilsMessengerEXT(instance, debugMessenger, null);
             }
@@ -244,6 +249,48 @@ public class Ch03PhysicalDeviceSelection {
             }
         }
 
+        private void createLogicalDevice() {
+
+            try(MemoryStack stack = stackPush()) {
+
+                QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
+
+                VkDeviceQueueCreateInfo.Buffer queueCreateInfos = VkDeviceQueueCreateInfo.calloc(1, stack);
+
+                queueCreateInfos.sType(VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO);
+                queueCreateInfos.queueFamilyIndex(indices.graphicsFamily);
+                queueCreateInfos.pQueuePriorities(stack.floats(1.0f));
+
+                VkPhysicalDeviceFeatures deviceFeatures = VkPhysicalDeviceFeatures.calloc(stack);
+
+                VkDeviceCreateInfo createInfo = VkDeviceCreateInfo.calloc(stack);
+
+                createInfo.sType(VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO);
+                createInfo.pQueueCreateInfos(queueCreateInfos);
+                // queueCreateInfoCount is automatically set
+
+                createInfo.pEnabledFeatures(deviceFeatures);
+
+                if(ENABLE_VALIDATION_LAYERS) {
+                    createInfo.ppEnabledLayerNames(validationLayersAsPointerBuffer(stack));
+                }
+
+                PointerBuffer pDevice = stack.pointers(VK_NULL_HANDLE);
+
+                if(vkCreateDevice(physicalDevice, createInfo, null, pDevice) != VK_SUCCESS) {
+                    throw new RuntimeException("Failed to create logical device");
+                }
+
+                device = new VkDevice(pDevice.get(0), physicalDevice, createInfo);
+
+                PointerBuffer pGraphicsQueue = stack.pointers(VK_NULL_HANDLE);
+
+                vkGetDeviceQueue(device, indices.graphicsFamily, 0, pGraphicsQueue);
+
+                graphicsQueue = new VkQueue(pGraphicsQueue.get(0), device);
+            }
+        }
+
         private boolean isDeviceSuitable(VkPhysicalDevice device) {
 
             QueueFamilyIndices indices = findQueueFamilies(device);