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main.cpp
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#define GLFW_INCLUDE_VULKAN
#include <GLFW/glfw3.h>
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#include <glm/gtc/matrix_transform.hpp>
#include <iostream>
#include <iomanip>
#include <fstream>
#include <set>
#include <thread>
#include <optional>
#include "Eigen/Dense"
#include "shaders/world/vert.spv.h"
#include "shaders/world/frag.spv.h"
#include "shaders/hud/vert.spv.h"
#include "shaders/hud/frag.spv.h"
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <unistd.h>
#include <curl/curl.h>
#include "json.hpp"
#include "common.h"
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include "font.h"
struct Input
{
Action action;
bool ballCamPressed;
};
struct State
{
ObjectState arenaState;
ObjectState ballState;
std::vector<Player> players;
std::optional<std::array<uint8_t, 2>> scores;
uint8_t playerId;
int64_t countdown;
int64_t transitionCountdown;
Input input;
bool running;
};
void physics(State &state, const std::vector<Player> &initialPlayers,
bool environment, std::optional<sockaddr_in> &serverAddress)
{
constexpr uint16_t PROTOCOL_VERSION = 1;
int udpSocket = -1;
try
{
bool multiplayer = serverAddress.has_value();
if (multiplayer || environment)
{
udpSocket = socket(AF_INET, SOCK_DGRAM, 0);
if (udpSocket < 0)
{
throw std::runtime_error("creating udp socket");
}
if (multiplayer)
{
char buffer[3];
if (sendto(udpSocket, &buffer, 1, 0, (struct sockaddr *)&serverAddress, sizeof(serverAddress)) < 1)
{
throw std::runtime_error("sending byte");
};
struct timeval timeout
{
.tv_sec = 1, .tv_usec = 0
};
setsockopt(udpSocket, SOL_SOCKET, SO_RCVTIMEO, (const char *)&timeout, sizeof(timeout));
if (recv(udpSocket, &buffer, sizeof(buffer), 0) < 1)
{
throw std::runtime_error("can't connect to server");
}
uint16_t server_protocol_version;
std::memcpy(&server_protocol_version, buffer, 2);
if (server_protocol_version != PROTOCOL_VERSION)
{
throw std::runtime_error("game and server have different versions. please update your game.");
}
state.playerId = buffer[2];
timeout.tv_sec = 0;
setsockopt(udpSocket, SOL_SOCKET, SO_RCVTIMEO, (const char *)&timeout, sizeof(timeout));
int flags = fcntl(udpSocket, F_GETFL, 0);
if (flags < 0)
{
throw std::runtime_error("getting socket flags");
}
if (fcntl(udpSocket, F_SETFL, flags | O_NONBLOCK) < 0)
{
throw std::runtime_error("setting O_NONBLOCK flag");
}
}
}
std::optional<struct sockaddr_in> environmentAddress;
if (environment)
{
environmentAddress.emplace();
environmentAddress->sin_family = AF_INET;
environmentAddress->sin_port = htons(5000);
environmentAddress->sin_addr.s_addr = inet_addr("127.0.0.1");
}
constexpr uint FREQUENCY = 60;
constexpr float PERIOD = 1.f / FREQUENCY;
constexpr size_t N_RECORDS = 5 * FREQUENCY;
ObjectState ball = state.ballState;
std::vector<Player> players = state.players;
Player records[N_RECORDS];
uint32_t stateId = 0;
uint32_t statesBehind = 0;
const auto period = std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::duration<float>(PERIOD));
auto targetTime = std::chrono::high_resolution_clock::now();
while (state.running)
{
if (!environment)
{
if (statesBehind == 0)
{
players[state.playerId].action = state.input.action;
if (multiplayer)
{
records[stateId % N_RECORDS] = players[state.playerId];
}
}
else
{
players[state.playerId] = records[stateId % N_RECORDS];
}
}
if (multiplayer)
{
if (statesBehind == 0)
{
char buffer[102];
std::memcpy(buffer, &stateId, 4);
std::memcpy(buffer + 4, players[state.playerId].state.position.data(), 12);
std::memcpy(buffer + 16, players[state.playerId].state.velocity.data(), 12);
std::memcpy(buffer + 28, players[state.playerId].state.orientation.data(), 12);
std::memcpy(buffer + 40, &players[state.playerId].action.steering, 4);
std::memcpy(buffer + 44, &players[state.playerId].action.throttle, 4);
sendto(udpSocket, buffer, sizeof(buffer), 0, (struct sockaddr *)&serverAddress, sizeof(serverAddress));
int recvLength = recv(udpSocket, buffer, sizeof(buffer), 0);
if (recvLength > 0)
{
uint32_t serverId;
uint8_t otherPlayer = state.playerId ^ 1;
std::memcpy(&serverId, buffer, 4);
std::memcpy(players[otherPlayer].state.position.data(), buffer + 4, 12);
std::memcpy(players[otherPlayer].state.velocity.data(), buffer + 16, 12);
std::memcpy(players[otherPlayer].state.orientation.data(), buffer + 28, 12);
std::memcpy(&players[otherPlayer].action.steering, buffer + 40, 4);
std::memcpy(&players[otherPlayer].action.throttle, buffer + 44, 4);
std::memcpy(ball.position.data(), buffer + 48, 12);
std::memcpy(ball.velocity.data(), buffer + 60, 12);
std::memcpy(ball.orientation.data(), buffer + 72, 12);
std::memcpy(&state.countdown, buffer + 84, 8);
std::memcpy(&state.transitionCountdown, buffer + 92, 8);
std::memcpy(&state.scores, buffer + 100, 2);
// TODO: fix countdown and score latency
if (state.transitionCountdown > 0)
{
players[state.playerId] = initialPlayers[state.playerId];
}
else
{
players[state.playerId] = records[serverId % N_RECORDS];
statesBehind = stateId - serverId;
stateId = serverId;
}
}
}
else
{
statesBehind--;
}
}
if (environment)
{
char buffer[72];
std::memcpy(buffer, ball.position.data(), 12);
std::memcpy(buffer + 12, ball.velocity.data(), 12);
std::memcpy(buffer + 24, ball.orientation.data(), 12);
std::memcpy(buffer + 36, players[state.playerId].state.position.data(), 12);
std::memcpy(buffer + 48, players[state.playerId].state.velocity.data(), 12);
std::memcpy(buffer + 60, players[state.playerId].state.orientation.data(), 12);
sendto(udpSocket, buffer, sizeof(buffer), 0,
(struct sockaddr *)&environmentAddress,
sizeof(*environmentAddress));
if (recv(udpSocket, buffer, sizeof(buffer), 0) <= 0)
{
throw(std::runtime_error("receive environment"));
}
std::memcpy(&players[state.playerId].action.throttle, buffer, 4);
std::memcpy(&players[state.playerId].action.steering, buffer + 4, 4);
}
physicsStep(ball, players, !multiplayer, PERIOD);
if (statesBehind == 0)
{
state.ballState = ball;
state.players = players;
targetTime += period;
std::this_thread::sleep_until(targetTime);
}
stateId++;
}
}
catch (const std::exception &e)
{
std::cerr << "error: " << e.what() << std::endl;
}
if (udpSocket > -1)
close(udpSocket);
state.running = false;
}
constexpr uint32_t WIDTH = 1280;
constexpr uint32_t HEIGHT = 720;
constexpr int MAX_FRAMES_IN_FLIGHT = 2;
const std::vector<const char *> validationLayers = {"VK_LAYER_KHRONOS_validation"};
const std::vector<const char *> deviceExtensions = {VK_KHR_SWAPCHAIN_EXTENSION_NAME};
#ifdef NDEBUG
constexpr bool enableValidationLayers = false;
#else
constexpr bool enableValidationLayers = true;
#endif
class InputGraphics
{
private:
struct QueueFamilyIndices
{
std::optional<uint32_t> graphicsFamily;
std::optional<uint32_t> presentFamily;
bool isComplete()
{
return graphicsFamily.has_value() && presentFamily.has_value();
}
};
struct SwapChainSupportDetails
{
VkSurfaceCapabilitiesKHR capabilities;
std::vector<VkPresentModeKHR> presentModes;
};
struct Vertex
{
glm::vec3 position;
glm::vec3 normal;
};
struct HudVertex
{
glm::vec2 position;
glm::vec2 textureCoordinate;
};
struct UniformBufferObject
{
alignas(16) glm::mat4 model[4];
alignas(16) glm::mat4 view;
alignas(16) glm::mat4 proj;
};
GLFWwindow *window;
VkInstance instance;
VkDebugUtilsMessengerEXT debugMessenger;
VkSurfaceKHR surface;
VkSurfaceFormatKHR surfaceFormat;
VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
VkDevice device;
VkQueue graphicsQueue;
VkQueue presentQueue;
VkSwapchainKHR swapChain;
std::vector<VkImage> swapChainImages;
VkExtent2D swapChainExtent;
std::vector<VkImageView> swapChainImageViews;
std::vector<VkFramebuffer> swapChainFramebuffers;
VkRenderPass renderPass;
VkDescriptorSetLayout descriptorSetLayout;
VkPipelineLayout pipelineLayout;
VkPipeline graphicsPipeline;
VkCommandPool commandPool;
VkFormat depthFormat = VK_FORMAT_UNDEFINED;
VkImage depthImage;
VkDeviceMemory depthImageMemory;
VkImageView depthImageView;
VkBuffer vertexBuffer;
VkDeviceMemory vertexBufferMemory;
VkBuffer indexBuffer;
VkDeviceMemory indexBufferMemory;
std::vector<VkBuffer> uniformBuffers;
std::vector<VkDeviceMemory> uniformBuffersMemory;
std::vector<void *> uniformBuffersMapped;
VkDescriptorPool descriptorPool;
std::vector<VkDescriptorSet> descriptorSets;
VkDeviceMemory fontImageMemory;
VkImage fontImage;
VkImageView fontImageView;
VkSampler fontSampler;
VkDescriptorPool hudDescriptorPool;
VkDescriptorSet hudDescriptorSet;
VkDescriptorSetLayout hudDescriptorSetLayout;
VkPipeline hudPipeline;
VkPipelineLayout hudPipelineLayout;
VkBuffer hudVertexBuffer;
VkDeviceMemory hudVertexBufferMemory;
void *hudMappedData;
std::vector<VkCommandBuffer> commandBuffers;
std::vector<VkSemaphore> imageAvailableSemaphores;
std::vector<VkSemaphore> renderFinishedSemaphores;
std::vector<VkFence> inFlightFences;
std::vector<uint32_t> indicesOffsets;
bool framebufferResized = false;
State &state;
static void framebufferResizeCallback(GLFWwindow *window, int width, int height)
{
auto inputGraphics = reinterpret_cast<InputGraphics *>(glfwGetWindowUserPointer(window));
inputGraphics->framebufferResized = true;
}
static VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity, VkDebugUtilsMessageTypeFlagsEXT messageType, const VkDebugUtilsMessengerCallbackDataEXT *pCallbackData, void *pUserData)
{
std::cerr << "validation layer: " << pCallbackData->pMessage << std::endl;
return VK_FALSE;
}
QueueFamilyIndices findQueueFamilies(VkPhysicalDevice device)
{
QueueFamilyIndices indices;
uint32_t queueFamilyCount = 0;
vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, nullptr);
std::vector<VkQueueFamilyProperties> queueFamilies(queueFamilyCount);
vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, queueFamilies.data());
int i = 0;
for (const auto &queueFamily : queueFamilies)
{
if (queueFamily.queueFlags & VK_QUEUE_GRAPHICS_BIT)
{
indices.graphicsFamily = i;
}
VkBool32 presentSupport = false;
vkGetPhysicalDeviceSurfaceSupportKHR(device, i, surface, &presentSupport);
if (presentSupport)
{
indices.presentFamily = i;
}
if (indices.isComplete())
{
break;
}
i++;
}
return indices;
}
VkImageView createImageView(VkImage image, VkFormat format, VkImageAspectFlags aspectFlags)
{
VkImageViewCreateInfo viewInfo{};
viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
viewInfo.image = image;
viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
viewInfo.format = format;
viewInfo.subresourceRange.aspectMask = aspectFlags;
viewInfo.subresourceRange.baseMipLevel = 0;
viewInfo.subresourceRange.levelCount = 1;
viewInfo.subresourceRange.baseArrayLayer = 0;
viewInfo.subresourceRange.layerCount = 1;
VkImageView imageView;
if (vkCreateImageView(device, &viewInfo, nullptr, &imageView) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create image view");
}
return imageView;
}
SwapChainSupportDetails querySwapChainSupport(VkPhysicalDevice device)
{
SwapChainSupportDetails details;
vkGetPhysicalDeviceSurfaceCapabilitiesKHR(device, surface, &details.capabilities);
uint32_t presentModeCount;
vkGetPhysicalDeviceSurfacePresentModesKHR(device, surface, &presentModeCount, nullptr);
if (presentModeCount != 0)
{
details.presentModes.resize(presentModeCount);
vkGetPhysicalDeviceSurfacePresentModesKHR(device, surface, &presentModeCount, details.presentModes.data());
}
return details;
}
void createSwapChainFramebuffers()
{
// swap chain
{
SwapChainSupportDetails swapChainSupport = querySwapChainSupport(physicalDevice);
VkExtent2D extent;
if (swapChainSupport.capabilities.currentExtent.width != std::numeric_limits<uint32_t>::max())
{
extent = swapChainSupport.capabilities.currentExtent;
}
else
{
int width, height;
glfwGetFramebufferSize(window, &width, &height);
extent = VkExtent2D{std::clamp(static_cast<uint32_t>(width), swapChainSupport.capabilities.minImageExtent.width, swapChainSupport.capabilities.maxImageExtent.width), std::clamp(static_cast<uint32_t>(height), swapChainSupport.capabilities.minImageExtent.height, swapChainSupport.capabilities.maxImageExtent.height)};
}
uint32_t imageCount = swapChainSupport.capabilities.minImageCount;
if (swapChainSupport.capabilities.maxImageCount == 0 || swapChainSupport.capabilities.minImageCount < swapChainSupport.capabilities.maxImageCount)
{
imageCount++;
}
VkSwapchainCreateInfoKHR createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
createInfo.surface = surface;
createInfo.minImageCount = imageCount;
createInfo.imageFormat = surfaceFormat.format;
createInfo.imageColorSpace = surfaceFormat.colorSpace;
createInfo.imageExtent = extent;
createInfo.imageArrayLayers = 1;
createInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
uint32_t queueFamilyIndices[] = {indices.graphicsFamily.value(), indices.presentFamily.value()};
if (indices.graphicsFamily != indices.presentFamily)
{
createInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
createInfo.queueFamilyIndexCount = 2;
createInfo.pQueueFamilyIndices = queueFamilyIndices;
}
else
{
createInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
}
createInfo.preTransform = swapChainSupport.capabilities.currentTransform;
createInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
createInfo.presentMode = VK_PRESENT_MODE_FIFO_KHR;
createInfo.clipped = VK_TRUE;
if (vkCreateSwapchainKHR(device, &createInfo, nullptr, &swapChain) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create swap chain");
}
vkGetSwapchainImagesKHR(device, swapChain, &imageCount, nullptr);
swapChainImages.resize(imageCount);
vkGetSwapchainImagesKHR(device, swapChain, &imageCount, swapChainImages.data());
swapChainExtent = extent;
swapChainImageViews.resize(swapChainImages.size());
for (uint32_t i = 0; i < swapChainImages.size(); i++)
{
swapChainImageViews[i] = createImageView(swapChainImages[i], surfaceFormat.format, VK_IMAGE_ASPECT_COLOR_BIT);
}
}
// frame buffers
{
VkImageCreateInfo imageInfo{};
imageInfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
imageInfo.imageType = VK_IMAGE_TYPE_2D;
imageInfo.extent.width = swapChainExtent.width;
imageInfo.extent.height = swapChainExtent.height;
imageInfo.extent.depth = 1;
imageInfo.mipLevels = 1;
imageInfo.arrayLayers = 1;
imageInfo.format = depthFormat;
imageInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
imageInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
imageInfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
imageInfo.samples = VK_SAMPLE_COUNT_1_BIT;
imageInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
if (vkCreateImage(device, &imageInfo, nullptr, &depthImage) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create image");
}
VkMemoryRequirements memRequirements;
vkGetImageMemoryRequirements(device, depthImage, &memRequirements);
VkMemoryAllocateInfo allocInfo{};
allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
allocInfo.allocationSize = memRequirements.size;
allocInfo.memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
if (vkAllocateMemory(device, &allocInfo, nullptr, &depthImageMemory) != VK_SUCCESS)
{
throw std::runtime_error("vulkan allocate image memory");
}
vkBindImageMemory(device, depthImage, depthImageMemory, 0);
depthImageView = createImageView(depthImage, depthFormat, VK_IMAGE_ASPECT_DEPTH_BIT);
swapChainFramebuffers.resize(swapChainImageViews.size());
for (size_t i = 0; i < swapChainImageViews.size(); i++)
{
std::array<VkImageView, 2> attachments = {
swapChainImageViews[i],
depthImageView};
VkFramebufferCreateInfo framebufferInfo{};
framebufferInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
framebufferInfo.renderPass = renderPass;
framebufferInfo.attachmentCount = static_cast<uint32_t>(attachments.size());
framebufferInfo.pAttachments = attachments.data();
framebufferInfo.width = swapChainExtent.width;
framebufferInfo.height = swapChainExtent.height;
framebufferInfo.layers = 1;
if (vkCreateFramebuffer(device, &framebufferInfo, nullptr, &swapChainFramebuffers[i]) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create framebuffer");
}
}
}
}
VkShaderModule createShaderModule(const unsigned char *code, const size_t codeSize)
{
VkShaderModuleCreateInfo createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
createInfo.codeSize = codeSize;
createInfo.pCode = reinterpret_cast<const uint32_t *>(code);
VkShaderModule shaderModule;
if (vkCreateShaderModule(device, &createInfo, nullptr, &shaderModule) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create shader module");
}
return shaderModule;
}
uint32_t findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties)
{
VkPhysicalDeviceMemoryProperties memProperties;
vkGetPhysicalDeviceMemoryProperties(physicalDevice, &memProperties);
for (uint32_t i = 0; i < memProperties.memoryTypeCount; i++)
{
if ((typeFilter & (1 << i)) && (memProperties.memoryTypes[i].propertyFlags & properties) == properties)
{
return i;
}
}
throw std::runtime_error("vulkan find suitable memory type");
}
void createBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags properties, VkBuffer &buffer, VkDeviceMemory &bufferMemory)
{
VkBufferCreateInfo bufferInfo{};
bufferInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
bufferInfo.size = size;
bufferInfo.usage = usage;
bufferInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
if (vkCreateBuffer(device, &bufferInfo, nullptr, &buffer) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create buffer");
}
VkMemoryRequirements memRequirements;
vkGetBufferMemoryRequirements(device, buffer, &memRequirements);
VkMemoryAllocateInfo allocInfo{};
allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
allocInfo.allocationSize = memRequirements.size;
allocInfo.memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, properties);
if (vkAllocateMemory(device, &allocInfo, nullptr, &bufferMemory) != VK_SUCCESS)
{
throw std::runtime_error("vulkan allocate buffer memory");
}
vkBindBufferMemory(device, buffer, bufferMemory, 0);
}
void copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size)
{
VkCommandBufferAllocateInfo allocInfo{};
allocInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
allocInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
allocInfo.commandPool = commandPool;
allocInfo.commandBufferCount = 1;
VkCommandBuffer commandBuffer;
vkAllocateCommandBuffers(device, &allocInfo, &commandBuffer);
VkCommandBufferBeginInfo beginInfo{};
beginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
beginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
vkBeginCommandBuffer(commandBuffer, &beginInfo);
VkBufferCopy copyRegion{};
copyRegion.size = size;
vkCmdCopyBuffer(commandBuffer, srcBuffer, dstBuffer, 1, ©Region);
vkEndCommandBuffer(commandBuffer);
VkSubmitInfo submitInfo{};
submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = &commandBuffer;
vkQueueSubmit(graphicsQueue, 1, &submitInfo, VK_NULL_HANDLE);
vkQueueWaitIdle(graphicsQueue);
vkFreeCommandBuffers(device, commandPool, 1, &commandBuffer);
}
void cleanupSwapChain()
{
vkDestroyImageView(device, depthImageView, nullptr);
vkDestroyImage(device, depthImage, nullptr);
vkFreeMemory(device, depthImageMemory, nullptr);
for (auto framebuffer : swapChainFramebuffers)
{
vkDestroyFramebuffer(device, framebuffer, nullptr);
}
for (auto imageView : swapChainImageViews)
{
vkDestroyImageView(device, imageView, nullptr);
}
vkDestroySwapchainKHR(device, swapChain, nullptr);
}
void recreateSwapChain()
{
int width = 0, height = 0;
while (width == 0 || height == 0)
{
glfwGetFramebufferSize(window, &width, &height);
glfwWaitEvents();
}
vkDeviceWaitIdle(device);
cleanupSwapChain();
createSwapChainFramebuffers();
}
VkCommandBuffer beginSingleTimeCommands()
{
VkCommandBufferAllocateInfo allocInfo = {};
allocInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
allocInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
allocInfo.commandPool = commandPool;
allocInfo.commandBufferCount = 1;
VkCommandBuffer commandBuffer;
vkAllocateCommandBuffers(device, &allocInfo, &commandBuffer);
VkCommandBufferBeginInfo beginInfo = {};
beginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
beginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
vkBeginCommandBuffer(commandBuffer, &beginInfo);
return commandBuffer;
}
void endSingleTimeCommands(VkCommandBuffer commandBuffer)
{
vkEndCommandBuffer(commandBuffer);
VkSubmitInfo submitInfo = {};
submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = &commandBuffer;
vkQueueSubmit(graphicsQueue, 1, &submitInfo, VK_NULL_HANDLE);
vkQueueWaitIdle(graphicsQueue);
vkFreeCommandBuffers(device, commandPool, 1, &commandBuffer);
}
void transitionImageLayout(VkImage image, VkFormat format, VkImageLayout oldLayout, VkImageLayout newLayout)
{
VkCommandBuffer commandBuffer = beginSingleTimeCommands();
VkImageMemoryBarrier barrier = {};
barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
barrier.oldLayout = oldLayout;
barrier.newLayout = newLayout;
barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
barrier.image = image;
barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
barrier.subresourceRange.baseMipLevel = 0;
barrier.subresourceRange.levelCount = 1;
barrier.subresourceRange.baseArrayLayer = 0;
barrier.subresourceRange.layerCount = 1;
VkPipelineStageFlags sourceStage;
VkPipelineStageFlags destinationStage;
if (oldLayout == VK_IMAGE_LAYOUT_UNDEFINED && newLayout == VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL)
{
barrier.srcAccessMask = 0;
barrier.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
sourceStage = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
destinationStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
}
else if (oldLayout == VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL && newLayout == VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL)
{
barrier.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
barrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
sourceStage = VK_PIPELINE_STAGE_TRANSFER_BIT;
destinationStage = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
}
else
{
throw std::invalid_argument("vulkan unsupported layout transition");
}
vkCmdPipelineBarrier(commandBuffer, sourceStage, destinationStage, 0, 0, nullptr, 0, nullptr, 1, &barrier);
endSingleTimeCommands(commandBuffer);
}
public:
InputGraphics(State &state)
: state(state) {}
void run()
{
try
{
const char *envValue = std::getenv("HACKER_LEAGUE");
const std::string basePath = (envValue != nullptr) ? std::string(envValue) + "/" : "";
// init window
{
glfwInit();
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
window = glfwCreateWindow(WIDTH, HEIGHT, "hacker league", nullptr, nullptr);
glfwSetWindowUserPointer(window, this);
glfwSetFramebufferSizeCallback(window, framebufferResizeCallback);
// TODO: environment variable
std::ifstream file(basePath + "gamepad.txt");
if (!file)
{
throw std::runtime_error("opening gamepad.txt");
}
std::string fileContents((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
glfwUpdateGamepadMappings(fileContents.c_str());
}
// init vulkan
{
VkDebugUtilsMessengerCreateInfoEXT debugCreateInfo;
QueueFamilyIndices queueFamilyIndices;
// create instance
{
if (enableValidationLayers)
{
uint32_t layerCount;
vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
std::vector<VkLayerProperties> availableLayers(layerCount);
vkEnumerateInstanceLayerProperties(&layerCount, availableLayers.data());
for (const char *layerName : validationLayers)
{
bool layerFound = false;
for (const auto &layerProperties : availableLayers)
{
if (strcmp(layerName, layerProperties.layerName) == 0)
{
layerFound = true;
break;
}
}
if (!layerFound)
{
throw std::runtime_error("vulkan validation layers requested, but not available");
}
}
}
VkApplicationInfo appInfo{};
appInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
appInfo.pApplicationName = "hacker league";
appInfo.applicationVersion = VK_MAKE_VERSION(0, 1, 0);
appInfo.pEngineName = "No Engine";
appInfo.engineVersion = VK_MAKE_VERSION(1, 0, 0);
appInfo.apiVersion = VK_API_VERSION_1_0;
VkInstanceCreateInfo createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
createInfo.pApplicationInfo = &appInfo;
uint32_t glfwExtensionCount = 0;
const char **glfwExtensions;
glfwExtensions = glfwGetRequiredInstanceExtensions(&glfwExtensionCount);
std::vector<const char *> extensions(glfwExtensions, glfwExtensions + glfwExtensionCount);
if (enableValidationLayers)
{
extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
}
createInfo.enabledExtensionCount = static_cast<uint32_t>(extensions.size());
createInfo.ppEnabledExtensionNames = extensions.data();
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 = debugCallback;
if (enableValidationLayers)
{
createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
createInfo.ppEnabledLayerNames = validationLayers.data();
createInfo.pNext = (VkDebugUtilsMessengerCreateInfoEXT *)&debugCreateInfo;
}
else
{
createInfo.enabledLayerCount = 0;
createInfo.pNext = nullptr;
}
if (vkCreateInstance(&createInfo, nullptr, &instance) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create instance");
}
}
// setup debug messenger
{
if (enableValidationLayers)
{
auto func = (PFN_vkCreateDebugUtilsMessengerEXT)vkGetInstanceProcAddr(instance, "vkCreateDebugUtilsMessengerEXT");
const char *errorMessage = "vulkan set up debug messenger";
if (func != nullptr)
{
if (func(instance, &debugCreateInfo, nullptr, &debugMessenger) != VK_SUCCESS)
{
throw std::runtime_error(errorMessage);
}
}
else
{
throw std::runtime_error(errorMessage);
}
}
}
// create surface
{
if (glfwCreateWindowSurface(instance, window, nullptr, &surface) != VK_SUCCESS)
{
throw std::runtime_error("vulkan create window surface");
}
}
// pick physical device
{
uint32_t deviceCount = 0;
vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
if (deviceCount == 0)
{
throw std::runtime_error("vulkan find GPUs with Vulkan support");
}
std::vector<VkPhysicalDevice> devices(deviceCount);
vkEnumeratePhysicalDevices(instance, &deviceCount, devices.data());
for (const auto &device : devices)
{
QueueFamilyIndices indices = findQueueFamilies(device);
uint32_t extensionCount;
vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, nullptr);
std::vector<VkExtensionProperties> availableExtensions(extensionCount);
vkEnumerateDeviceExtensionProperties(device, nullptr, &extensionCount, availableExtensions.data());
std::set<std::string> requiredExtensions(deviceExtensions.begin(), deviceExtensions.end());
for (const auto &extension : availableExtensions)
{
requiredExtensions.erase(extension.extensionName);
}
bool extensionsSupported = requiredExtensions.empty();
SwapChainSupportDetails swapChainSupport = querySwapChainSupport(device);
VkPhysicalDeviceFeatures supportedFeatures;
vkGetPhysicalDeviceFeatures(device, &supportedFeatures);
uint32_t formatCount;
vkGetPhysicalDeviceSurfaceFormatsKHR(device, surface, &formatCount, nullptr);
std::vector<VkSurfaceFormatKHR> formats;
if (formatCount != 0)
{
formats.resize(formatCount);
vkGetPhysicalDeviceSurfaceFormatsKHR(device, surface, &formatCount, formats.data());
}
if (indices.isComplete() && extensionsSupported && !formats.empty() && !swapChainSupport.presentModes.empty())
{
physicalDevice = device;
queueFamilyIndices = indices;
surfaceFormat = formats[0];
for (const auto &availableFormat : formats)
{
if (availableFormat.format == VK_FORMAT_B8G8R8A8_SRGB && availableFormat.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR)
{
surfaceFormat = availableFormat;
}
}
break;
}
}
if (physicalDevice == VK_NULL_HANDLE)
{
throw std::runtime_error("vulkan find a suitable GPU");
}
}
// create logical device
{
std::vector<VkDeviceQueueCreateInfo> queueCreateInfos;
std::set<uint32_t> uniqueQueueFamilies = {queueFamilyIndices.graphicsFamily.value(), queueFamilyIndices.presentFamily.value()};
float queuePriority = 1.0f;