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Ch05WindowSurface.java
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Ch05WindowSurface.java
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package javavulkantutorial;
import org.lwjgl.PointerBuffer;
import org.lwjgl.system.MemoryStack;
import org.lwjgl.vulkan.*;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.IntStream;
import static java.util.stream.Collectors.toSet;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.glfw.GLFWVulkan.glfwCreateWindowSurface;
import static org.lwjgl.glfw.GLFWVulkan.glfwGetRequiredInstanceExtensions;
import static org.lwjgl.system.Configuration.DEBUG;
import static org.lwjgl.system.MemoryStack.stackGet;
import static org.lwjgl.system.MemoryStack.stackPush;
import static org.lwjgl.system.MemoryUtil.NULL;
import static org.lwjgl.vulkan.EXTDebugUtils.*;
import static org.lwjgl.vulkan.KHRSurface.vkDestroySurfaceKHR;
import static org.lwjgl.vulkan.KHRSurface.vkGetPhysicalDeviceSurfaceSupportKHR;
import static org.lwjgl.vulkan.VK10.*;
public class Ch05WindowSurface {
private static class HelloTriangleApplication {
private static final int WIDTH = 800;
private static final int HEIGHT = 600;
private static final boolean ENABLE_VALIDATION_LAYERS = DEBUG.get(true);
private static final Set<String> VALIDATION_LAYERS;
static {
if(ENABLE_VALIDATION_LAYERS) {
VALIDATION_LAYERS = new HashSet<>();
VALIDATION_LAYERS.add("VK_LAYER_KHRONOS_validation");
} else {
// We are not going to use it, so we don't create it
VALIDATION_LAYERS = null;
}
}
private static int debugCallback(int messageSeverity, int messageType, long pCallbackData, long pUserData) {
VkDebugUtilsMessengerCallbackDataEXT callbackData = VkDebugUtilsMessengerCallbackDataEXT.create(pCallbackData);
System.err.println("Validation layer: " + callbackData.pMessageString());
return VK_FALSE;
}
private static int createDebugUtilsMessengerEXT(VkInstance instance, VkDebugUtilsMessengerCreateInfoEXT createInfo,
VkAllocationCallbacks allocationCallbacks, LongBuffer pDebugMessenger) {
if(vkGetInstanceProcAddr(instance, "vkCreateDebugUtilsMessengerEXT") != NULL) {
return vkCreateDebugUtilsMessengerEXT(instance, createInfo, allocationCallbacks, pDebugMessenger);
}
return VK_ERROR_EXTENSION_NOT_PRESENT;
}
private static void destroyDebugUtilsMessengerEXT(VkInstance instance, long debugMessenger, VkAllocationCallbacks allocationCallbacks) {
if(vkGetInstanceProcAddr(instance, "vkDestroyDebugUtilsMessengerEXT") != NULL) {
vkDestroyDebugUtilsMessengerEXT(instance, debugMessenger, allocationCallbacks);
}
}
private class QueueFamilyIndices {
// We use Integer to use null as the empty value
private Integer graphicsFamily;
private Integer presentFamily;
private boolean isComplete() {
return graphicsFamily != null && presentFamily != null;
}
public int[] unique() {
return IntStream.of(graphicsFamily, presentFamily).distinct().toArray();
}
}
// ======= FIELDS ======= //
private long window;
private VkInstance instance;
private long debugMessenger;
private long surface;
private VkPhysicalDevice physicalDevice;
private VkDevice device;
private VkQueue graphicsQueue;
private VkQueue presentQueue;
// ======= METHODS ======= //
public void run() {
initWindow();
initVulkan();
mainLoop();
cleanup();
}
private void initWindow() {
if(!glfwInit()) {
throw new RuntimeException("Cannot initialize GLFW");
}
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
String title = getClass().getEnclosingClass().getSimpleName();
window = glfwCreateWindow(WIDTH, HEIGHT, title, NULL, NULL);
if(window == NULL) {
throw new RuntimeException("Cannot create window");
}
}
private void initVulkan() {
createInstance();
setupDebugMessenger();
createSurface();
pickPhysicalDevice();
createLogicalDevice();
}
private void mainLoop() {
while(!glfwWindowShouldClose(window)) {
glfwPollEvents();
}
}
private void cleanup() {
vkDestroyDevice(device, null);
if(ENABLE_VALIDATION_LAYERS) {
destroyDebugUtilsMessengerEXT(instance, debugMessenger, null);
}
vkDestroySurfaceKHR(instance, surface, null);
vkDestroyInstance(instance, null);
glfwDestroyWindow(window);
glfwTerminate();
}
private void createInstance() {
if(ENABLE_VALIDATION_LAYERS && !checkValidationLayerSupport()) {
throw new RuntimeException("Validation requested but not supported");
}
try(MemoryStack stack = stackPush()) {
// Use calloc to initialize the structs with 0s. Otherwise, the program can crash due to random values
VkApplicationInfo appInfo = VkApplicationInfo.calloc(stack);
appInfo.sType(VK_STRUCTURE_TYPE_APPLICATION_INFO);
appInfo.pApplicationName(stack.UTF8Safe("Hello Triangle"));
appInfo.applicationVersion(VK_MAKE_VERSION(1, 0, 0));
appInfo.pEngineName(stack.UTF8Safe("No Engine"));
appInfo.engineVersion(VK_MAKE_VERSION(1, 0, 0));
appInfo.apiVersion(VK_API_VERSION_1_0);
VkInstanceCreateInfo createInfo = VkInstanceCreateInfo.calloc(stack);
createInfo.sType(VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO);
createInfo.pApplicationInfo(appInfo);
// enabledExtensionCount is implicitly set when you call ppEnabledExtensionNames
createInfo.ppEnabledExtensionNames(getRequiredExtensions(stack));
if(ENABLE_VALIDATION_LAYERS) {
createInfo.ppEnabledLayerNames(validationLayersAsPointerBuffer(stack));
VkDebugUtilsMessengerCreateInfoEXT debugCreateInfo = VkDebugUtilsMessengerCreateInfoEXT.calloc(stack);
populateDebugMessengerCreateInfo(debugCreateInfo);
createInfo.pNext(debugCreateInfo.address());
}
// We need to retrieve the pointer of the created instance
PointerBuffer instancePtr = stack.mallocPointer(1);
if(vkCreateInstance(createInfo, null, instancePtr) != VK_SUCCESS) {
throw new RuntimeException("Failed to create instance");
}
instance = new VkInstance(instancePtr.get(0), createInfo);
}
}
private void populateDebugMessengerCreateInfo(VkDebugUtilsMessengerCreateInfoEXT debugCreateInfo) {
debugCreateInfo.sType(VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT);
debugCreateInfo.messageSeverity(VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT);
debugCreateInfo.messageType(VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT);
debugCreateInfo.pfnUserCallback(HelloTriangleApplication::debugCallback);
}
private void setupDebugMessenger() {
if(!ENABLE_VALIDATION_LAYERS) {
return;
}
try(MemoryStack stack = stackPush()) {
VkDebugUtilsMessengerCreateInfoEXT createInfo = VkDebugUtilsMessengerCreateInfoEXT.calloc(stack);
populateDebugMessengerCreateInfo(createInfo);
LongBuffer pDebugMessenger = stack.longs(VK_NULL_HANDLE);
if(createDebugUtilsMessengerEXT(instance, createInfo, null, pDebugMessenger) != VK_SUCCESS) {
throw new RuntimeException("Failed to set up debug messenger");
}
debugMessenger = pDebugMessenger.get(0);
}
}
private void createSurface() {
try(MemoryStack stack = stackPush()) {
LongBuffer pSurface = stack.longs(VK_NULL_HANDLE);
if(glfwCreateWindowSurface(instance, window, null, pSurface) != VK_SUCCESS) {
throw new RuntimeException("Failed to create window surface");
}
surface = pSurface.get(0);
}
}
private void pickPhysicalDevice() {
try(MemoryStack stack = stackPush()) {
IntBuffer deviceCount = stack.ints(0);
vkEnumeratePhysicalDevices(instance, deviceCount, null);
if(deviceCount.get(0) == 0) {
throw new RuntimeException("Failed to find GPUs with Vulkan support");
}
PointerBuffer ppPhysicalDevices = stack.mallocPointer(deviceCount.get(0));
vkEnumeratePhysicalDevices(instance, deviceCount, ppPhysicalDevices);
for(int i = 0;i < ppPhysicalDevices.capacity();i++) {
VkPhysicalDevice device = new VkPhysicalDevice(ppPhysicalDevices.get(i), instance);
if(isDeviceSuitable(device)) {
physicalDevice = device;
return;
}
}
throw new RuntimeException("Failed to find a suitable GPU");
}
}
private void createLogicalDevice() {
try(MemoryStack stack = stackPush()) {
QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
int[] uniqueQueueFamilies = indices.unique();
VkDeviceQueueCreateInfo.Buffer queueCreateInfos = VkDeviceQueueCreateInfo.calloc(uniqueQueueFamilies.length, stack);
for(int i = 0;i < uniqueQueueFamilies.length;i++) {
VkDeviceQueueCreateInfo queueCreateInfo = queueCreateInfos.get(i);
queueCreateInfo.sType(VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO);
queueCreateInfo.queueFamilyIndex(uniqueQueueFamilies[i]);
queueCreateInfo.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 pQueue = stack.pointers(VK_NULL_HANDLE);
vkGetDeviceQueue(device, indices.graphicsFamily, 0, pQueue);
graphicsQueue = new VkQueue(pQueue.get(0), device);
vkGetDeviceQueue(device, indices.presentFamily, 0, pQueue);
presentQueue = new VkQueue(pQueue.get(0), device);
}
}
private boolean isDeviceSuitable(VkPhysicalDevice device) {
QueueFamilyIndices indices = findQueueFamilies(device);
return indices.isComplete();
}
private QueueFamilyIndices findQueueFamilies(VkPhysicalDevice device) {
QueueFamilyIndices indices = new QueueFamilyIndices();
try(MemoryStack stack = stackPush()) {
IntBuffer queueFamilyCount = stack.ints(0);
vkGetPhysicalDeviceQueueFamilyProperties(device, queueFamilyCount, null);
VkQueueFamilyProperties.Buffer queueFamilies = VkQueueFamilyProperties.malloc(queueFamilyCount.get(0), stack);
vkGetPhysicalDeviceQueueFamilyProperties(device, queueFamilyCount, queueFamilies);
IntBuffer presentSupport = stack.ints(VK_FALSE);
for(int i = 0;i < queueFamilies.capacity() || !indices.isComplete();i++) {
if((queueFamilies.get(i).queueFlags() & VK_QUEUE_GRAPHICS_BIT) != 0) {
indices.graphicsFamily = i;
}
vkGetPhysicalDeviceSurfaceSupportKHR(device, i, surface, presentSupport);
if(presentSupport.get(0) == VK_TRUE) {
indices.presentFamily = i;
}
}
return indices;
}
}
private PointerBuffer validationLayersAsPointerBuffer(MemoryStack stack) {
PointerBuffer buffer = stack.mallocPointer(VALIDATION_LAYERS.size());
VALIDATION_LAYERS.stream()
.map(stack::UTF8)
.forEach(buffer::put);
return buffer.rewind();
}
private PointerBuffer getRequiredExtensions(MemoryStack stack) {
PointerBuffer glfwExtensions = glfwGetRequiredInstanceExtensions();
if(ENABLE_VALIDATION_LAYERS) {
PointerBuffer extensions = stack.mallocPointer(glfwExtensions.capacity() + 1);
extensions.put(glfwExtensions);
extensions.put(stack.UTF8(VK_EXT_DEBUG_UTILS_EXTENSION_NAME));
// Rewind the buffer before returning it to reset its position back to 0
return extensions.rewind();
}
return glfwExtensions;
}
private boolean checkValidationLayerSupport() {
try(MemoryStack stack = stackPush()) {
IntBuffer layerCount = stack.ints(0);
vkEnumerateInstanceLayerProperties(layerCount, null);
VkLayerProperties.Buffer availableLayers = VkLayerProperties.malloc(layerCount.get(0), stack);
vkEnumerateInstanceLayerProperties(layerCount, availableLayers);
Set<String> availableLayerNames = availableLayers.stream()
.map(VkLayerProperties::layerNameString)
.collect(toSet());
return availableLayerNames.containsAll(VALIDATION_LAYERS);
}
}
}
public static void main(String[] args) {
HelloTriangleApplication app = new HelloTriangleApplication();
app.run();
}
}