35_gltf_ktx.cpp

#include <iostream>
#include <fstream>
#include <stdexcept>
#include <vector>
#include <cstring>
#include <cstdlib>
#include <memory>
#include <algorithm>
#include <limits>
#include <array>
#include <chrono>
#include <optional>
#include <assert.h>

#if defined(__INTELLISENSE__) || !defined(USE_CPP20_MODULES)
#include <vulkan/vulkan_raii.hpp>
#else
import vulkan_hpp;
#endif
#include <vulkan/vk_platform.h>
#if defined(__ANDROID__)
#include <vulkan/vulkan_core.h>
#include <vulkan/vulkan_android.h>
#endif
#include <vulkan/vulkan_profiles.hpp>

#if defined(__ANDROID__)
    #define PLATFORM_ANDROID 1
#else
    #define PLATFORM_DESKTOP 1
#endif

// Include tinygltf instead of tinyobjloader
// TINYGLTF_IMPLEMENTATION is already defined in the command line
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include <tiny_gltf.h>

// Include KTX library for texture loading
#include <ktx.h>

#if PLATFORM_ANDROID
    #include <android/log.h>
    #include <game-activity/native_app_glue/android_native_app_glue.h>
    #include <android/asset_manager.h>
    #include <android/asset_manager_jni.h>

    // Declare and implement app_dummy function from native_app_glue
    extern "C" void app_dummy() {
        // This is a dummy function that does nothing
        // It's used to prevent the linker from stripping out the native_app_glue code
    }

    // Define AAssetManager type for Android
    typedef AAssetManager AssetManagerType;

    #define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "VulkanTutorial", __VA_ARGS__))
    #define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN, "VulkanTutorial", __VA_ARGS__))
    #define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "VulkanTutorial", __VA_ARGS__))
#else
    // Define AAssetManager type for non-Android platforms
    typedef void AssetManagerType;
    // Desktop-specific includes
    #define GLFW_INCLUDE_VULKAN
    #include <GLFW/glfw3.h>

    // Define logging macros for Desktop
    #define LOGI(...) printf(__VA_ARGS__); printf("\n")
    #define LOGW(...) printf(__VA_ARGS__); printf("\n")
    #define LOGE(...) fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n")
#endif

#define GLM_FORCE_RADIANS
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#define GLM_ENABLE_EXPERIMENTAL
#define GLM_FORCE_CXX11
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtx/hash.hpp>

constexpr uint32_t WIDTH = 800;
constexpr uint32_t HEIGHT = 600;
constexpr uint64_t FenceTimeout = 100000000;
// Update paths to use glTF model and KTX2 texture
const std::string MODEL_PATH = "models/viking_room.glb";
const std::string TEXTURE_PATH = "textures/viking_room.ktx2";
constexpr int MAX_FRAMES_IN_FLIGHT = 2;

// Define VpProfileProperties structure for Android only
#if PLATFORM_ANDROID
#ifndef VP_PROFILE_PROPERTIES_DEFINED
#define VP_PROFILE_PROPERTIES_DEFINED
struct VpProfileProperties {
    char name[256];
    uint32_t specVersion;
};
#endif
#endif

// Define Vulkan Profile constants
#ifndef VP_KHR_ROADMAP_2022_NAME
#define VP_KHR_ROADMAP_2022_NAME "VP_KHR_roadmap_2022"
#endif

#ifndef VP_KHR_ROADMAP_2022_SPEC_VERSION
#define VP_KHR_ROADMAP_2022_SPEC_VERSION 1
#endif

struct AppInfo {
    bool profileSupported = false;
    VpProfileProperties profile;
};

#if PLATFORM_ANDROID
void android_main(android_app* app);

struct AndroidAppState {
    ANativeWindow* nativeWindow = nullptr;
    bool initialized = false;
    android_app* app = nullptr;
};
#endif

#ifdef NDEBUG
constexpr bool enableValidationLayers = false;
#else
constexpr bool enableValidationLayers = true;
#endif

struct Vertex {
    glm::vec3 pos;
    glm::vec3 color;
    glm::vec2 texCoord;

    static vk::VertexInputBindingDescription getBindingDescription() {
        return { 0, sizeof(Vertex), vk::VertexInputRate::eVertex };
    }

    static std::array<vk::VertexInputAttributeDescription, 3> getAttributeDescriptions() {
        return {
            vk::VertexInputAttributeDescription( 0, 0, vk::Format::eR32G32B32Sfloat, offsetof(Vertex, pos) ),
            vk::VertexInputAttributeDescription( 1, 0, vk::Format::eR32G32B32Sfloat, offsetof(Vertex, color) ),
            vk::VertexInputAttributeDescription( 2, 0, vk::Format::eR32G32Sfloat, offsetof(Vertex, texCoord) )
        };
    }

    bool operator==(const Vertex& other) const {
        return pos == other.pos && color == other.color && texCoord == other.texCoord;
    }
};

template<> struct std::hash<Vertex> {
    size_t operator()(Vertex const& vertex) const noexcept {
        return ((hash<glm::vec3>()(vertex.pos) ^ (hash<glm::vec3>()(vertex.color) << 1)) >> 1) ^ (hash<glm::vec2>()(vertex.texCoord) << 1);
    }
};

struct UniformBufferObject {
    alignas(16) glm::mat4 model;
    alignas(16) glm::mat4 view;
    alignas(16) glm::mat4 proj;
};

class VulkanApplication {
public:
#if PLATFORM_ANDROID
    void run(android_app* app) {
        androidAppState.nativeWindow = app->window;
        androidAppState.app = app;
        app->userData = &androidAppState;
        app->onAppCmd = handleAppCommand;
        // Note: onInputEvent is no longer a member of android_app in the current NDK version
        // Input events are now handled differently

        int events;
        android_poll_source* source;

        while (app->destroyRequested == 0) {
            while (ALooper_pollOnce(androidAppState.initialized ? 0 : -1, nullptr, &events, (void**)&source) >= 0) {
                if (source != nullptr) {
                    source->process(app, source);
                }
            }

            if (androidAppState.initialized && androidAppState.nativeWindow != nullptr) {
                drawFrame();
            }
        }

        if (androidAppState.initialized) {
            device.waitIdle();
        }
    }
#else
    void run() {
        initWindow();
        initVulkan();
        mainLoop();
        cleanup();
    }
#endif

private:
#if PLATFORM_ANDROID
    AndroidAppState androidAppState;

    static void handleAppCommand(android_app* app, int32_t cmd) {
        auto* appState = static_cast<AndroidAppState*>(app->userData);

        switch (cmd) {
            case APP_CMD_INIT_WINDOW:
                if (app->window != nullptr) {
                    appState->nativeWindow = app->window;
                    // We can't cast AndroidAppState to VulkanApplication directly
                    // Instead, we need to access the VulkanApplication instance through a global variable
                    // or another mechanism. For now, we'll just set the initialized flag.
                    appState->initialized = true;
                }
                break;
            case APP_CMD_TERM_WINDOW:
                appState->nativeWindow = nullptr;
                break;
            default:
                break;
        }
    }

    static int32_t handleInputEvent(android_app* app, AInputEvent* event) {
        if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
            float x = AMotionEvent_getX(event, 0);
            float y = AMotionEvent_getY(event, 0);

            LOGI("Touch at: %f, %f", x, y);

            return 1;
        }
        return 0;
    }
#else
    GLFWwindow* window = nullptr;
#endif

    AppInfo appInfo;
    vk::raii::Context                context;
    vk::raii::Instance               instance       = nullptr;
    vk::raii::DebugUtilsMessengerEXT debugMessenger = nullptr;
    vk::raii::SurfaceKHR             surface        = nullptr;
    vk::raii::PhysicalDevice         physicalDevice = nullptr;
    vk::raii::Device                 device         = nullptr;
    uint32_t                         queueIndex     = ~0;
    vk::raii::Queue                  queue          = nullptr;
    vk::raii::SwapchainKHR           swapChain      = nullptr;
    std::vector<vk::Image>           swapChainImages;
    vk::SurfaceFormatKHR             swapChainSurfaceFormat;
    vk::Extent2D                     swapChainExtent;
    std::vector<vk::raii::ImageView> swapChainImageViews;

    vk::raii::DescriptorSetLayout descriptorSetLayout = nullptr;
    vk::raii::PipelineLayout pipelineLayout = nullptr;
    vk::raii::Pipeline graphicsPipeline = nullptr;

    vk::raii::Image depthImage = nullptr;
    vk::raii::DeviceMemory depthImageMemory = nullptr;
    vk::raii::ImageView depthImageView = nullptr;

    vk::raii::Image textureImage = nullptr;
    vk::raii::DeviceMemory textureImageMemory = nullptr;
    vk::raii::ImageView textureImageView = nullptr;
    vk::raii::Sampler textureSampler = nullptr;
    vk::Format textureImageFormat = vk::Format::eUndefined;

    std::vector<Vertex> vertices;
    std::vector<uint32_t> indices;
    vk::raii::Buffer vertexBuffer = nullptr;
    vk::raii::DeviceMemory vertexBufferMemory = nullptr;
    vk::raii::Buffer indexBuffer = nullptr;
    vk::raii::DeviceMemory indexBufferMemory = nullptr;

    std::vector<vk::raii::Buffer> uniformBuffers;
    std::vector<vk::raii::DeviceMemory> uniformBuffersMemory;
    std::vector<void*> uniformBuffersMapped;

    vk::raii::DescriptorPool descriptorPool = nullptr;
    std::vector<vk::raii::DescriptorSet> descriptorSets;

    vk::raii::CommandPool commandPool = nullptr;
    std::vector<vk::raii::CommandBuffer> commandBuffers;

    std::vector<vk::raii::Semaphore> presentCompleteSemaphore;
    std::vector<vk::raii::Semaphore> renderFinishedSemaphore;
    std::vector<vk::raii::Fence> inFlightFences;
    uint32_t currentFrame = 0;

    bool framebufferResized = false;

    std::vector<const char*> requiredDeviceExtension = {
        vk::KHRSwapchainExtensionName,
        vk::KHRCreateRenderpass2ExtensionName
    };

#if PLATFORM_DESKTOP
    void initWindow() {
        glfwInit();

        glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);

        window = glfwCreateWindow(WIDTH, HEIGHT, "Vulkan", nullptr, nullptr);
        glfwSetWindowUserPointer(window, this);
        glfwSetFramebufferSizeCallback(window, framebufferResizeCallback);
    }

    static void framebufferResizeCallback(GLFWwindow* window, int width, int height) {
        auto app = static_cast<VulkanApplication*>(glfwGetWindowUserPointer(window));
        app->framebufferResized = true;
    }
#endif

public:
    void initVulkan() {
        createInstance();
        setupDebugMessenger();
        createSurface();
        pickPhysicalDevice();
        createLogicalDevice();
        createSwapChain();
        createImageViews();
        createDescriptorSetLayout();
        createGraphicsPipeline();
        createCommandPool();
        createDepthResources();
        createTextureImage();
        createTextureImageView();
        createTextureSampler();
        loadModel();
        createVertexBuffer();
        createIndexBuffer();
        createUniformBuffers();
        createDescriptorPool();
        createDescriptorSets();
        createCommandBuffers();
        createSyncObjects();
    }

private:

#if PLATFORM_DESKTOP
    void mainLoop() {
        while (!glfwWindowShouldClose(window)) {
            glfwPollEvents();
            drawFrame();
        }

        device.waitIdle();
    }
#endif

    void cleanupSwapChain() {
        swapChainImageViews.clear();
        swapChain = nullptr;
    }

#if PLATFORM_DESKTOP
    void cleanup() const {
        glfwDestroyWindow(window);
        glfwTerminate();
    }
#endif

    void recreateSwapChain() {
#if PLATFORM_DESKTOP
        int width = 0, height = 0;
        glfwGetFramebufferSize(window, &width, &height);
        while (width == 0 || height == 0) {
            glfwGetFramebufferSize(window, &width, &height);
            glfwWaitEvents();
        }
#endif

        device.waitIdle();

        cleanupSwapChain();
        createSwapChain();
        createImageViews();
        createDepthResources();
    }

    void createInstance() {
        constexpr vk::ApplicationInfo appInfo{
            .pApplicationName = "Hello Triangle",
            .applicationVersion = VK_MAKE_VERSION(1, 0, 0),
            .pEngineName = "No Engine",
            .engineVersion = VK_MAKE_VERSION(1, 0, 0),
            .apiVersion = VK_API_VERSION_1_3
        };

        auto extensions = getRequiredExtensions();

        vk::InstanceCreateInfo createInfo{
            .pApplicationInfo = &appInfo,
            .enabledExtensionCount = static_cast<uint32_t>(extensions.size()),
            .ppEnabledExtensionNames = extensions.data()
        };

        instance = vk::raii::Instance(context, createInfo);
        LOGI("Vulkan instance created");
    }

    void setupDebugMessenger() {
        // Debug messenger setup is disabled for now to avoid compatibility issues
        // This is a simplified approach to get the code compiling
        if (!enableValidationLayers) return;

        LOGI("Debug messenger setup skipped for compatibility");
    }

    void createSurface() {
#if PLATFORM_DESKTOP
        VkSurfaceKHR _surface;
        if (glfwCreateWindowSurface(*instance, window, nullptr, &_surface) != VK_SUCCESS) {
            throw std::runtime_error("failed to create window surface!");
        }
        surface = vk::raii::SurfaceKHR(instance, _surface);
#else
        VkSurfaceKHR _surface;
        VkAndroidSurfaceCreateInfoKHR createInfo{
            .sType = VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR,
            .window = androidAppState.nativeWindow
        };
        if (vkCreateAndroidSurfaceKHR(*instance, &createInfo, nullptr, &_surface) != VK_SUCCESS) {
            throw std::runtime_error("failed to create Android surface!");
        }
        surface = vk::raii::SurfaceKHR(instance, _surface);
#endif
    }

    void pickPhysicalDevice() {
        std::vector<vk::raii::PhysicalDevice> devices = instance.enumeratePhysicalDevices();
        const auto devIter = std::ranges::find_if(
            devices,
            [&](auto const& device) {
                // Check if the device supports the Vulkan 1.3 API version
                bool supportsVulkan1_3 = device.getProperties().apiVersion >= VK_API_VERSION_1_3;

                // Check if any of the queue families support graphics operations
                auto queueFamilies = device.getQueueFamilyProperties();
                bool supportsGraphics =
                    std::ranges::any_of(queueFamilies, [](auto const& qfp) { return !!(qfp.queueFlags & vk::QueueFlagBits::eGraphics); });

                // Check if all required device extensions are available
                auto availableDeviceExtensions = device.enumerateDeviceExtensionProperties();
                bool supportsAllRequiredExtensions =
                    std::ranges::all_of(requiredDeviceExtension,
                        [&availableDeviceExtensions](auto const& requiredDeviceExtension) {
                            return std::ranges::any_of(availableDeviceExtensions,
                                [requiredDeviceExtension](auto const& availableDeviceExtension) {
                                    return strcmp(availableDeviceExtension.extensionName, requiredDeviceExtension) == 0;
                                });
                        });

                auto features = device.template getFeatures2<vk::PhysicalDeviceFeatures2, vk::PhysicalDeviceVulkan13Features, vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT>();
                bool supportsRequiredFeatures = features.template get<vk::PhysicalDeviceVulkan13Features>().dynamicRendering &&
                    features.template get<vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT>().extendedDynamicState;

                return supportsVulkan1_3 && supportsGraphics && supportsAllRequiredExtensions && supportsRequiredFeatures;
            });

        if (devIter != devices.end()) {
            physicalDevice = *devIter;

            // Check for Vulkan profile support
            VpProfileProperties profileProperties;
#if PLATFORM_ANDROID
            strcpy(profileProperties.name, VP_KHR_ROADMAP_2022_NAME);
#else
            strcpy(profileProperties.profileName, VP_KHR_ROADMAP_2022_NAME);
#endif
            profileProperties.specVersion = VP_KHR_ROADMAP_2022_SPEC_VERSION;

            VkBool32 supported = VK_FALSE;
            bool result = false;

#if PLATFORM_ANDROID
            // Create a vp::ProfileDesc from our VpProfileProperties
            vp::ProfileDesc profileDesc = {
                profileProperties.name,
                profileProperties.specVersion
            };

            // Use vp::GetProfileSupport for Android
            result = vp::GetProfileSupport(
                *physicalDevice,  // Pass the physical device directly
                &profileDesc,     // Pass the profile description
                &supported        // Output parameter for support status
            );
#else
            // Use vpGetPhysicalDeviceProfileSupport for Desktop
            VkResult vk_result = vpGetPhysicalDeviceProfileSupport(
                *instance,
                *physicalDevice,
                &profileProperties,
                &supported
            );
            result = vk_result == static_cast<int>(vk::Result::eSuccess);
#endif
            const char* name = nullptr;
#ifdef PLATFORM_ANDROID
            name = profileProperties.name;
#else
            name = profileProperties.profileName;
#endif

            if (result && supported == VK_TRUE) {
                appInfo.profileSupported = true;
                appInfo.profile = profileProperties;
                LOGI("Device supports Vulkan profile: %s", name);
            } else {
                LOGI("Device does not support Vulkan profile: %s", name);
            }
        } else {
            throw std::runtime_error("failed to find a suitable GPU!");
        }
    }

    void createLogicalDevice() {
        std::vector<vk::QueueFamilyProperties> queueFamilyProperties = physicalDevice.getQueueFamilyProperties();

        // get the first index into queueFamilyProperties which supports both graphics and present
        for (uint32_t qfpIndex = 0; qfpIndex < queueFamilyProperties.size(); qfpIndex++)
        {
            if ((queueFamilyProperties[qfpIndex].queueFlags & vk::QueueFlagBits::eGraphics) &&
                physicalDevice.getSurfaceSupportKHR(qfpIndex, *surface))
            {
                // found a queue family that supports both graphics and present
                queueIndex = qfpIndex;
                break;
            }
        }
        if (queueIndex == ~0)
        {
            throw std::runtime_error("Could not find a queue for graphics and present -> terminating");
        }

        // query for Vulkan 1.3 features
        auto features = physicalDevice.getFeatures2();
        vk::PhysicalDeviceVulkan13Features vulkan13Features;
        vk::PhysicalDeviceExtendedDynamicStateFeaturesEXT extendedDynamicStateFeatures;
        vulkan13Features.dynamicRendering = vk::True;
        vulkan13Features.synchronization2 = vk::True;
        extendedDynamicStateFeatures.extendedDynamicState = vk::True;
        vulkan13Features.pNext = &extendedDynamicStateFeatures;
        features.pNext = &vulkan13Features;
        // create a Device
        float                     queuePriority = 0.0f;
        vk::DeviceQueueCreateInfo deviceQueueCreateInfo { .queueFamilyIndex = queueIndex, .queueCount = 1, .pQueuePriorities = &queuePriority };
        vk::DeviceCreateInfo      deviceCreateInfo{
            .pNext =  &features,
            .queueCreateInfoCount = 1,
            .pQueueCreateInfos = &deviceQueueCreateInfo,
            .enabledExtensionCount = static_cast<uint32_t>(requiredDeviceExtension.size()),
            .ppEnabledExtensionNames = requiredDeviceExtension.data()
         };

        // Create the device with the appropriate features
        device = vk::raii::Device(physicalDevice, deviceCreateInfo);

        queue = vk::raii::Queue(device, queueIndex, 0);
    }

    void createSwapChain() {
        auto surfaceCapabilities = physicalDevice.getSurfaceCapabilitiesKHR( *surface );
        swapChainExtent          = chooseSwapExtent( surfaceCapabilities );
        swapChainSurfaceFormat   = chooseSwapSurfaceFormat( physicalDevice.getSurfaceFormatsKHR( *surface ) );
        vk::SwapchainCreateInfoKHR swapChainCreateInfo{ .surface          = *surface,
                                                        .minImageCount    = chooseSwapMinImageCount( surfaceCapabilities ),
                                                        .imageFormat      = swapChainSurfaceFormat.format,
                                                        .imageColorSpace  = swapChainSurfaceFormat.colorSpace,
                                                        .imageExtent      = swapChainExtent,
                                                        .imageArrayLayers = 1,
                                                        .imageUsage       = vk::ImageUsageFlagBits::eColorAttachment,
                                                        .imageSharingMode = vk::SharingMode::eExclusive,
                                                        .preTransform     = surfaceCapabilities.currentTransform,
                                                        .compositeAlpha   = vk::CompositeAlphaFlagBitsKHR::eOpaque,
                                                        .presentMode      = chooseSwapPresentMode( physicalDevice.getSurfacePresentModesKHR( *surface ) ),
                                                        .clipped          = true };

        swapChain = vk::raii::SwapchainKHR(device, swapChainCreateInfo);
        swapChainImages = swapChain.getImages();
    }

    void createImageViews() {
        assert(swapChainImageViews.empty());

        vk::ImageViewCreateInfo imageViewCreateInfo{
            .viewType = vk::ImageViewType::e2D,
            .format = swapChainSurfaceFormat.format,
            .subresourceRange = { vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1 }
        };
        for ( auto image : swapChainImages )
        {
            imageViewCreateInfo.image = image;
            swapChainImageViews.emplace_back( device, imageViewCreateInfo );
        }
    }

    void createDescriptorSetLayout() {
        std::array bindings = {
            vk::DescriptorSetLayoutBinding( 0, vk::DescriptorType::eUniformBuffer, 1, vk::ShaderStageFlagBits::eVertex, nullptr),
            vk::DescriptorSetLayoutBinding( 1, vk::DescriptorType::eCombinedImageSampler, 1, vk::ShaderStageFlagBits::eFragment, nullptr)
        };

        vk::DescriptorSetLayoutCreateInfo layoutInfo{ .bindingCount = static_cast<uint32_t>(bindings.size()), .pBindings = bindings.data() };
        descriptorSetLayout = vk::raii::DescriptorSetLayout(device, layoutInfo);
    }

    void createGraphicsPipeline() {
        vk::raii::ShaderModule shaderModule = createShaderModule(this->readFile("shaders/slang.spv"));

        vk::PipelineShaderStageCreateInfo vertShaderStageInfo{ .stage = vk::ShaderStageFlagBits::eVertex, .module = *shaderModule,  .pName = "vertMain" };
        vk::PipelineShaderStageCreateInfo fragShaderStageInfo{ .stage = vk::ShaderStageFlagBits::eFragment, .module = *shaderModule, .pName = "fragMain" };
        vk::PipelineShaderStageCreateInfo shaderStages[] = {vertShaderStageInfo, fragShaderStageInfo};

        auto bindingDescription = Vertex::getBindingDescription();
        auto attributeDescriptions = Vertex::getAttributeDescriptions();
        vk::PipelineVertexInputStateCreateInfo vertexInputInfo{
            .vertexBindingDescriptionCount = 1,
            .pVertexBindingDescriptions = &bindingDescription,
            .vertexAttributeDescriptionCount = static_cast<uint32_t>(attributeDescriptions.size()),
            .pVertexAttributeDescriptions = attributeDescriptions.data()
        };
        vk::PipelineInputAssemblyStateCreateInfo inputAssembly{
            .topology = vk::PrimitiveTopology::eTriangleList,
            .primitiveRestartEnable = vk::False
        };
        vk::PipelineViewportStateCreateInfo viewportState{
            .viewportCount = 1,
            .scissorCount = 1
        };
        vk::PipelineRasterizationStateCreateInfo rasterizer{
            .depthClampEnable = vk::False,
            .rasterizerDiscardEnable = vk::False,
            .polygonMode = vk::PolygonMode::eFill,
            .cullMode = vk::CullModeFlagBits::eBack, // Re-enabled culling for better performance
            .frontFace = vk::FrontFace::eClockwise, // Keeping Clockwise for glTF
            .depthBiasEnable = vk::False
        };
        rasterizer.lineWidth = 1.0f;
        vk::PipelineMultisampleStateCreateInfo multisampling{
            .rasterizationSamples = vk::SampleCountFlagBits::e1,
            .sampleShadingEnable = vk::False
        };
        vk::PipelineDepthStencilStateCreateInfo depthStencil{
            .depthTestEnable = vk::True,
            .depthWriteEnable = vk::True,
            .depthCompareOp = vk::CompareOp::eLess,
            .depthBoundsTestEnable = vk::False,
            .stencilTestEnable = vk::False
        };
        vk::PipelineColorBlendAttachmentState colorBlendAttachment;
        colorBlendAttachment.colorWriteMask = vk::ColorComponentFlagBits::eR | vk::ColorComponentFlagBits::eG | vk::ColorComponentFlagBits::eB | vk::ColorComponentFlagBits::eA;
        colorBlendAttachment.blendEnable = vk::False;

        vk::PipelineColorBlendStateCreateInfo colorBlending{
            .logicOpEnable = vk::False,
            .logicOp = vk::LogicOp::eCopy,
            .attachmentCount = 1,
            .pAttachments = &colorBlendAttachment
        };

        std::vector dynamicStates = {
            vk::DynamicState::eViewport,
            vk::DynamicState::eScissor
        };
        vk::PipelineDynamicStateCreateInfo dynamicState{ .dynamicStateCount = static_cast<uint32_t>(dynamicStates.size()), .pDynamicStates = dynamicStates.data() };

        vk::PipelineLayoutCreateInfo pipelineLayoutInfo{  .setLayoutCount = 1, .pSetLayouts = &*descriptorSetLayout, .pushConstantRangeCount = 0 };

        pipelineLayout = vk::raii::PipelineLayout(device, pipelineLayoutInfo);

        vk::Format depthFormat = findDepthFormat();
        vk::PipelineRenderingCreateInfo pipelineRenderingCreateInfo{
            .colorAttachmentCount = 1,
            .pColorAttachmentFormats = &swapChainSurfaceFormat.format,
            .depthAttachmentFormat = depthFormat
        };
        vk::GraphicsPipelineCreateInfo pipelineInfo{ .pNext = &pipelineRenderingCreateInfo,
            .stageCount = 2,
            .pStages = shaderStages,
            .pVertexInputState = &vertexInputInfo,
            .pInputAssemblyState = &inputAssembly,
            .pViewportState = &viewportState,
            .pRasterizationState = &rasterizer,
            .pMultisampleState = &multisampling,
            .pDepthStencilState = &depthStencil,
            .pColorBlendState = &colorBlending,
            .pDynamicState = &dynamicState,
            .layout = *pipelineLayout,
            .renderPass = nullptr
        };

        graphicsPipeline = vk::raii::Pipeline(device, nullptr, pipelineInfo);
    }

    void createCommandPool() {
        vk::CommandPoolCreateInfo poolInfo{
            .flags = vk::CommandPoolCreateFlagBits::eResetCommandBuffer,
            .queueFamilyIndex = queueIndex
        };
        commandPool = vk::raii::CommandPool(device, poolInfo);
    }

    void createDepthResources() {
        vk::Format depthFormat = findDepthFormat();

        createImage(swapChainExtent.width, swapChainExtent.height, depthFormat, vk::ImageTiling::eOptimal, vk::ImageUsageFlagBits::eDepthStencilAttachment, vk::MemoryPropertyFlagBits::eDeviceLocal, depthImage, depthImageMemory);
        depthImageView = createImageView(depthImage, depthFormat, vk::ImageAspectFlagBits::eDepth);
    }

    vk::Format findSupportedFormat(const std::vector<vk::Format>& candidates, vk::ImageTiling tiling, vk::FormatFeatureFlags features) const {
        for (const auto format : candidates) {
            vk::FormatProperties props = physicalDevice.getFormatProperties(format);

            if (tiling == vk::ImageTiling::eLinear && (props.linearTilingFeatures & features) == features) {
                return format;
            }
            if (tiling == vk::ImageTiling::eOptimal && (props.optimalTilingFeatures & features) == features) {
                return format;
            }
        }

        throw std::runtime_error("failed to find supported format!");
    }

    [[nodiscard]] vk::Format findDepthFormat() const {
        return findSupportedFormat(
        {vk::Format::eD32Sfloat, vk::Format::eD32SfloatS8Uint, vk::Format::eD24UnormS8Uint},
            vk::ImageTiling::eOptimal,
            vk::FormatFeatureFlagBits::eDepthStencilAttachment
        );
    }

    static bool hasStencilComponent(vk::Format format) {
        return format == vk::Format::eD32SfloatS8Uint || format == vk::Format::eD24UnormS8Uint;
    }

    void createTextureImage() {
        // Load KTX2 texture instead of using stb_image
        ktxTexture* kTexture;
        KTX_error_code result = ktxTexture_CreateFromNamedFile(
            TEXTURE_PATH.c_str(),
            KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT,
            &kTexture);

        if (result != KTX_SUCCESS) {
            throw std::runtime_error("failed to load ktx texture image!");
        }

        // Get texture dimensions and data
        uint32_t texWidth = kTexture->baseWidth;
        uint32_t texHeight = kTexture->baseHeight;
        ktx_size_t imageSize = ktxTexture_GetImageSize(kTexture, 0);
        ktx_uint8_t* ktxTextureData = ktxTexture_GetData(kTexture);

        vk::raii::Buffer stagingBuffer({});
        vk::raii::DeviceMemory stagingBufferMemory({});
        createBuffer(imageSize, vk::BufferUsageFlagBits::eTransferSrc, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent, stagingBuffer, stagingBufferMemory);

        void* data = stagingBufferMemory.mapMemory(0, imageSize);
        memcpy(data, ktxTextureData, imageSize);
        stagingBufferMemory.unmapMemory();

        // Determine the Vulkan format from KTX format
        vk::Format textureFormat;

        // Check if the KTX texture has a format
        if (kTexture->classId == ktxTexture2_c) {
            // For KTX2 files, we can get the format directly
            auto* ktx2 = reinterpret_cast<ktxTexture2*>(kTexture);
            textureFormat = static_cast<vk::Format>(ktx2->vkFormat);
            if (textureFormat == vk::Format::eUndefined) {
                // If the format is undefined, fall back to a reasonable default
                textureFormat = vk::Format::eR8G8B8A8Unorm;
            }
        } else {
            // For KTX1 files or if we can't determine the format, use a reasonable default
            textureFormat = vk::Format::eR8G8B8A8Unorm;
        }

        textureImageFormat = textureFormat;

        createImage(texWidth, texHeight, textureFormat, vk::ImageTiling::eOptimal,
                   vk::ImageUsageFlagBits::eTransferDst | vk::ImageUsageFlagBits::eSampled,
                   vk::MemoryPropertyFlagBits::eDeviceLocal, textureImage, textureImageMemory);

        transitionImageLayout(textureImage, vk::ImageLayout::eUndefined, vk::ImageLayout::eTransferDstOptimal);
        copyBufferToImage(stagingBuffer, textureImage, texWidth, texHeight);
        transitionImageLayout(textureImage, vk::ImageLayout::eTransferDstOptimal, vk::ImageLayout::eShaderReadOnlyOptimal);

        ktxTexture_Destroy(kTexture);
    }

    void createTextureImageView() {
        textureImageView = createImageView(textureImage, textureImageFormat, vk::ImageAspectFlagBits::eColor);
    }

    void createTextureSampler() {
        vk::PhysicalDeviceProperties properties = physicalDevice.getProperties();
        vk::SamplerCreateInfo samplerInfo{
            .magFilter = vk::Filter::eLinear,
            .minFilter = vk::Filter::eLinear,
            .mipmapMode = vk::SamplerMipmapMode::eLinear,
            .addressModeU = vk::SamplerAddressMode::eRepeat,
            .addressModeV = vk::SamplerAddressMode::eRepeat,
            .addressModeW = vk::SamplerAddressMode::eRepeat,
            .mipLodBias = 0.0f,
            .anisotropyEnable = vk::True,
            .maxAnisotropy = properties.limits.maxSamplerAnisotropy,
            .compareEnable = vk::False,
            .compareOp = vk::CompareOp::eAlways
        };
        textureSampler = vk::raii::Sampler(device, samplerInfo);
    }

    vk::raii::ImageView createImageView(vk::raii::Image& image, vk::Format format, vk::ImageAspectFlags aspectFlags) {
        vk::ImageViewCreateInfo viewInfo{
            .image = *image,
            .viewType = vk::ImageViewType::e2D,
            .format = format,
            .subresourceRange = { aspectFlags, 0, 1, 0, 1 }
        };
        return vk::raii::ImageView(device, viewInfo);
    }

    void createImage(uint32_t width, uint32_t height, vk::Format format, vk::ImageTiling tiling, vk::ImageUsageFlags usage, vk::MemoryPropertyFlags properties, vk::raii::Image& image, vk::raii::DeviceMemory& imageMemory) {
        vk::ImageCreateInfo imageInfo{
            .imageType = vk::ImageType::e2D,
            .format = format,
            .extent = {width, height, 1},
            .mipLevels = 1,
            .arrayLayers = 1,
            .samples = vk::SampleCountFlagBits::e1,
            .tiling = tiling,
            .usage = usage,
            .sharingMode = vk::SharingMode::eExclusive,
            .initialLayout = vk::ImageLayout::eUndefined
        };
        image = vk::raii::Image(device, imageInfo);

        vk::MemoryRequirements memRequirements = image.getMemoryRequirements();
        vk::MemoryAllocateInfo allocInfo{
            .allocationSize = memRequirements.size,
            .memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, properties)
        };
        imageMemory = vk::raii::DeviceMemory(device, allocInfo);
        image.bindMemory(*imageMemory, 0);
    }

    void transitionImageLayout(const vk::raii::Image& image, vk::ImageLayout oldLayout, vk::ImageLayout newLayout) {
        auto commandBuffer = beginSingleTimeCommands();

        vk::ImageMemoryBarrier barrier{
            .oldLayout = oldLayout,
            .newLayout = newLayout,
            .image = *image,
            .subresourceRange = { vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1 }
        };

        vk::PipelineStageFlags sourceStage;
        vk::PipelineStageFlags destinationStage;

        if (oldLayout == vk::ImageLayout::eUndefined && newLayout == vk::ImageLayout::eTransferDstOptimal) {
            barrier.srcAccessMask = {};
            barrier.dstAccessMask = vk::AccessFlagBits::eTransferWrite;

            sourceStage = vk::PipelineStageFlagBits::eTopOfPipe;
            destinationStage = vk::PipelineStageFlagBits::eTransfer;
        } else if (oldLayout == vk::ImageLayout::eTransferDstOptimal && newLayout == vk::ImageLayout::eShaderReadOnlyOptimal) {
            barrier.srcAccessMask =  vk::AccessFlagBits::eTransferWrite;
            barrier.dstAccessMask =  vk::AccessFlagBits::eShaderRead;

            sourceStage = vk::PipelineStageFlagBits::eTransfer;
            destinationStage = vk::PipelineStageFlagBits::eFragmentShader;
        } else {
            throw std::invalid_argument("unsupported layout transition!");
        }
        commandBuffer->pipelineBarrier( sourceStage, destinationStage, {}, {}, nullptr, barrier );
        endSingleTimeCommands(*commandBuffer);
    }

    void copyBufferToImage(const vk::raii::Buffer& buffer, vk::raii::Image& image, uint32_t width, uint32_t height) {
        std::unique_ptr<vk::raii::CommandBuffer> commandBuffer = beginSingleTimeCommands();
        vk::BufferImageCopy region{
            .bufferOffset = 0,
            .bufferRowLength = 0,
            .bufferImageHeight = 0,
            .imageSubresource = { vk::ImageAspectFlagBits::eColor, 0, 0, 1 },
            .imageOffset = {0, 0, 0},
            .imageExtent = {width, height, 1}
        };
        commandBuffer->copyBufferToImage(*buffer, *image, vk::ImageLayout::eTransferDstOptimal, {region});
        endSingleTimeCommands(*commandBuffer);
    }

    void loadModel() {
        // Use tinygltf to load the model instead of tinyobjloader
        tinygltf::Model model;
        tinygltf::TinyGLTF loader;
        std::string err;
        std::string warn;

        bool ret = loader.LoadBinaryFromFile(&model, &err, &warn, MODEL_PATH);

        if (!warn.empty()) {
            std::cout << "glTF warning: " << warn << std::endl;
        }

        if (!err.empty()) {
            std::cout << "glTF error: " << err << std::endl;
        }

        if (!ret) {
            throw std::runtime_error("Failed to load glTF model");
        }

        vertices.clear();
        indices.clear();

        // Process all meshes in the model
        for (const auto& mesh : model.meshes) {
            for (const auto& primitive : mesh.primitives) {
                // Get indices
                const tinygltf::Accessor& indexAccessor = model.accessors[primitive.indices];
                const tinygltf::BufferView& indexBufferView = model.bufferViews[indexAccessor.bufferView];
                const tinygltf::Buffer& indexBuffer = model.buffers[indexBufferView.buffer];

                // Get vertex positions
                const tinygltf::Accessor& posAccessor = model.accessors[primitive.attributes.at("POSITION")];
                const tinygltf::BufferView& posBufferView = model.bufferViews[posAccessor.bufferView];
                const tinygltf::Buffer& posBuffer = model.buffers[posBufferView.buffer];

                // Get texture coordinates if available
                bool hasTexCoords = primitive.attributes.find("TEXCOORD_0") != primitive.attributes.end();
                const tinygltf::Accessor* texCoordAccessor = nullptr;
                const tinygltf::BufferView* texCoordBufferView = nullptr;
                const tinygltf::Buffer* texCoordBuffer = nullptr;

                if (hasTexCoords) {
                    texCoordAccessor = &model.accessors[primitive.attributes.at("TEXCOORD_0")];
                    texCoordBufferView = &model.bufferViews[texCoordAccessor->bufferView];
                    texCoordBuffer = &model.buffers[texCoordBufferView->buffer];
                }

                uint32_t baseVertex = static_cast<uint32_t>(vertices.size());

                for (size_t i = 0; i < posAccessor.count; i++) {
                    Vertex vertex{};

                    const float* pos = reinterpret_cast<const float*>(&posBuffer.data[posBufferView.byteOffset + posAccessor.byteOffset + i * 12]);
                    // glTF uses a right-handed coordinate system with Y-up
                    // Vulkan uses a right-handed coordinate system with Y-down
                    // We need to flip the Y coordinate
                    vertex.pos = {pos[0], -pos[1], pos[2]};

                    if (hasTexCoords) {
                        const float* texCoord = reinterpret_cast<const float*>(&texCoordBuffer->data[texCoordBufferView->byteOffset + texCoordAccessor->byteOffset + i * 8]);
                        vertex.texCoord = {texCoord[0], texCoord[1]};
                    } else {
                        vertex.texCoord = {0.0f, 0.0f};
                    }

                    vertex.color = {1.0f, 1.0f, 1.0f};

                    vertices.push_back(vertex);
                }

                const unsigned char* indexData = &indexBuffer.data[indexBufferView.byteOffset + indexAccessor.byteOffset];
                size_t indexCount = indexAccessor.count;
                size_t indexStride = 0;

                // Determine index stride based on component type
                if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT) {
                    indexStride = sizeof(uint16_t);
                } else if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT) {
                    indexStride = sizeof(uint32_t);
                } else if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE) {
                    indexStride = sizeof(uint8_t);
                } else {
                    throw std::runtime_error("Unsupported index component type");
                }

                indices.reserve(indices.size() + indexCount);

                for (size_t i = 0; i < indexCount; i++) {
                    uint32_t index = 0;

                    if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_SHORT) {
                        index = *reinterpret_cast<const uint16_t*>(indexData + i * indexStride);
                    } else if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT) {
                        index = *reinterpret_cast<const uint32_t*>(indexData + i * indexStride);
                    } else if (indexAccessor.componentType == TINYGLTF_COMPONENT_TYPE_UNSIGNED_BYTE) {
                        index = *reinterpret_cast<const uint8_t*>(indexData + i * indexStride);
                    }

                    indices.push_back(baseVertex + index);
                }
            }
        }
    }

    void createVertexBuffer() {
        vk::DeviceSize bufferSize = sizeof(vertices[0]) * vertices.size();
        vk::raii::Buffer stagingBuffer({});
        vk::raii::DeviceMemory stagingBufferMemory({});
        createBuffer(bufferSize, vk::BufferUsageFlagBits::eTransferSrc, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent, stagingBuffer, stagingBufferMemory);

        void* dataStaging = stagingBufferMemory.mapMemory(0, bufferSize);
        memcpy(dataStaging, vertices.data(), bufferSize);
        stagingBufferMemory.unmapMemory();

        createBuffer(bufferSize, vk::BufferUsageFlagBits::eTransferDst | vk::BufferUsageFlagBits::eVertexBuffer, vk::MemoryPropertyFlagBits::eDeviceLocal, vertexBuffer, vertexBufferMemory);

        copyBuffer(stagingBuffer, vertexBuffer, bufferSize);
    }

    void createIndexBuffer() {
        vk::DeviceSize bufferSize = sizeof(indices[0]) * indices.size();

        vk::raii::Buffer stagingBuffer({});
        vk::raii::DeviceMemory stagingBufferMemory({});
        createBuffer(bufferSize, vk::BufferUsageFlagBits::eTransferSrc, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent, stagingBuffer, stagingBufferMemory);

        void* data = stagingBufferMemory.mapMemory(0, bufferSize);
        memcpy(data, indices.data(), bufferSize);
        stagingBufferMemory.unmapMemory();

        createBuffer(bufferSize, vk::BufferUsageFlagBits::eTransferDst | vk::BufferUsageFlagBits::eIndexBuffer, vk::MemoryPropertyFlagBits::eDeviceLocal, indexBuffer, indexBufferMemory);

        copyBuffer(stagingBuffer, indexBuffer, bufferSize);
    }

    void createUniformBuffers() {
        uniformBuffers.clear();
        uniformBuffersMemory.clear();
        uniformBuffersMapped.clear();

        for (size_t i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
            vk::DeviceSize bufferSize = sizeof(UniformBufferObject);
            vk::raii::Buffer buffer({});
            vk::raii::DeviceMemory bufferMem({});
            createBuffer(bufferSize, vk::BufferUsageFlagBits::eUniformBuffer, vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent, buffer, bufferMem);
            uniformBuffers.emplace_back(std::move(buffer));
            uniformBuffersMemory.emplace_back(std::move(bufferMem));
            uniformBuffersMapped.emplace_back( uniformBuffersMemory[i].mapMemory(0, bufferSize));
        }
    }

    void createDescriptorPool() {
        std::array poolSize {
            vk::DescriptorPoolSize( vk::DescriptorType::eUniformBuffer, MAX_FRAMES_IN_FLIGHT),
            vk::DescriptorPoolSize(  vk::DescriptorType::eCombinedImageSampler, MAX_FRAMES_IN_FLIGHT)
        };
        vk::DescriptorPoolCreateInfo poolInfo{
            .flags = vk::DescriptorPoolCreateFlagBits::eFreeDescriptorSet,
            .maxSets = MAX_FRAMES_IN_FLIGHT,
            .poolSizeCount = static_cast<uint32_t>(poolSize.size()),
            .pPoolSizes = poolSize.data()
        };
        descriptorPool = vk::raii::DescriptorPool(device, poolInfo);
    }

    void createDescriptorSets() {
        std::vector<vk::DescriptorSetLayout> layouts(MAX_FRAMES_IN_FLIGHT, *descriptorSetLayout);
        vk::DescriptorSetAllocateInfo allocInfo{
            .descriptorPool = *descriptorPool,
            .descriptorSetCount = static_cast<uint32_t>(layouts.size()),
            .pSetLayouts = layouts.data()
        };

        descriptorSets.clear();
        descriptorSets = device.allocateDescriptorSets(allocInfo);

        for (size_t i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
            vk::DescriptorBufferInfo bufferInfo{
                .buffer = *uniformBuffers[i],
                .offset = 0,
                .range = sizeof(UniformBufferObject)
            };
            vk::DescriptorImageInfo imageInfo{
                .sampler = *textureSampler,
                .imageView = *textureImageView,
                .imageLayout = vk::ImageLayout::eShaderReadOnlyOptimal
            };
            std::array descriptorWrites{
                vk::WriteDescriptorSet{
                    .dstSet = *descriptorSets[i],
                    .dstBinding = 0,
                    .dstArrayElement = 0,
                    .descriptorCount = 1,
                    .descriptorType = vk::DescriptorType::eUniformBuffer,
                    .pBufferInfo = &bufferInfo
                },
                vk::WriteDescriptorSet{
                    .dstSet = *descriptorSets[i],
                    .dstBinding = 1,
                    .dstArrayElement = 0,
                    .descriptorCount = 1,
                    .descriptorType = vk::DescriptorType::eCombinedImageSampler,
                    .pImageInfo = &imageInfo
                }
            };
            device.updateDescriptorSets(descriptorWrites, {});
        }
    }

    void createBuffer(vk::DeviceSize size, vk::BufferUsageFlags usage, vk::MemoryPropertyFlags properties, vk::raii::Buffer& buffer, vk::raii::DeviceMemory& bufferMemory) {
        vk::BufferCreateInfo bufferInfo{
            .size = size,
            .usage = usage,
            .sharingMode = vk::SharingMode::eExclusive
        };
        buffer = vk::raii::Buffer(device, bufferInfo);
        vk::MemoryRequirements memRequirements = buffer.getMemoryRequirements();
        vk::MemoryAllocateInfo allocInfo{
            .allocationSize = memRequirements.size,
            .memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, properties)
        };
        bufferMemory = vk::raii::DeviceMemory(device, allocInfo);
        buffer.bindMemory(*bufferMemory, 0);
    }

    std::unique_ptr<vk::raii::CommandBuffer> beginSingleTimeCommands() {
        vk::CommandBufferAllocateInfo allocInfo{
            .commandPool = *commandPool,
            .level = vk::CommandBufferLevel::ePrimary,
            .commandBufferCount = 1
        };
        std::unique_ptr<vk::raii::CommandBuffer> commandBuffer = std::make_unique<vk::raii::CommandBuffer>(std::move(vk::raii::CommandBuffers(device, allocInfo).front()));

        vk::CommandBufferBeginInfo beginInfo{
            .flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit
        };
        commandBuffer->begin(beginInfo);

        return commandBuffer;
    }

    void endSingleTimeCommands(const vk::raii::CommandBuffer& commandBuffer) const {
        commandBuffer.end();

        vk::SubmitInfo submitInfo{ .commandBufferCount = 1, .pCommandBuffers = &*commandBuffer };
        queue.submit(submitInfo, nullptr);
        queue.waitIdle();
    }

    void copyBuffer(vk::raii::Buffer & srcBuffer, vk::raii::Buffer & dstBuffer, vk::DeviceSize size) {
        vk::CommandBufferAllocateInfo allocInfo{ .commandPool = *commandPool, .level = vk::CommandBufferLevel::ePrimary, .commandBufferCount = 1 };
        vk::raii::CommandBuffer commandCopyBuffer = std::move(device.allocateCommandBuffers(allocInfo).front());
        commandCopyBuffer.begin(vk::CommandBufferBeginInfo{ .flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit });
        commandCopyBuffer.copyBuffer(*srcBuffer, *dstBuffer, vk::BufferCopy{ .size = size });
        commandCopyBuffer.end();
        queue.submit(vk::SubmitInfo{ .commandBufferCount = 1, .pCommandBuffers = &*commandCopyBuffer }, nullptr);
        queue.waitIdle();
    }

    uint32_t findMemoryType(uint32_t typeFilter, vk::MemoryPropertyFlags properties) {
        vk::PhysicalDeviceMemoryProperties memProperties = physicalDevice.getMemoryProperties();

        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("failed to find suitable memory type!");
    }

    void createCommandBuffers() {
        commandBuffers.clear();
        vk::CommandBufferAllocateInfo allocInfo{ .commandPool = *commandPool, .level = vk::CommandBufferLevel::ePrimary,
                                                 .commandBufferCount = MAX_FRAMES_IN_FLIGHT };
        commandBuffers = vk::raii::CommandBuffers(device, allocInfo);
    }

    void recordCommandBuffer(uint32_t imageIndex) {
        commandBuffers[currentFrame].begin({});
        transition_image_layout(
            imageIndex,
            vk::ImageLayout::eUndefined,
            vk::ImageLayout::eColorAttachmentOptimal,
            {},
            vk::AccessFlagBits2::eColorAttachmentWrite,
            vk::PipelineStageFlagBits2::eTopOfPipe,
            vk::PipelineStageFlagBits2::eColorAttachmentOutput
        );
        vk::ImageMemoryBarrier2 depthBarrier = {
            .srcStageMask = vk::PipelineStageFlagBits2::eTopOfPipe,
            .srcAccessMask = {},
            .dstStageMask = vk::PipelineStageFlagBits2::eEarlyFragmentTests | vk::PipelineStageFlagBits2::eLateFragmentTests,
            .dstAccessMask = vk::AccessFlagBits2::eDepthStencilAttachmentRead | vk::AccessFlagBits2::eDepthStencilAttachmentWrite,
            .oldLayout = vk::ImageLayout::eUndefined,
            .newLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal,
            .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
            .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
            .image = *depthImage,
            .subresourceRange = {
                .aspectMask = vk::ImageAspectFlagBits::eDepth,
                .baseMipLevel = 0,
                .levelCount = 1,
                .baseArrayLayer = 0,
                .layerCount = 1
            }
        };
        vk::DependencyInfo depthDependencyInfo = {
            .dependencyFlags = {},
            .imageMemoryBarrierCount = 1,
            .pImageMemoryBarriers = &depthBarrier
        };
        commandBuffers[currentFrame].pipelineBarrier2(depthDependencyInfo);

        vk::ClearValue clearColor = vk::ClearColorValue(0.0f, 0.0f, 0.0f, 1.0f);
        vk::RenderingAttachmentInfo attachmentInfo = {
            .imageView = *swapChainImageViews[imageIndex],
            .imageLayout = vk::ImageLayout::eColorAttachmentOptimal,
            .loadOp = vk::AttachmentLoadOp::eClear,
            .storeOp = vk::AttachmentStoreOp::eStore,
            .clearValue = clearColor
        };
        vk::ClearValue clearDepth = vk::ClearDepthStencilValue{ 1.0f, 0 };
        vk::RenderingAttachmentInfo depthAttachmentInfo{
            .imageView = *depthImageView,
            .imageLayout = vk::ImageLayout::eDepthStencilAttachmentOptimal,
            .loadOp = vk::AttachmentLoadOp::eClear,
            .storeOp = vk::AttachmentStoreOp::eDontCare,
            .clearValue = clearDepth
        };
        vk::RenderingInfo renderingInfo = {
            .renderArea = { .offset = { 0, 0 }, .extent = swapChainExtent },
            .layerCount = 1,
            .colorAttachmentCount = 1,
            .pColorAttachments = &attachmentInfo,
            .pDepthAttachment = &depthAttachmentInfo
        };
        commandBuffers[currentFrame].beginRendering(renderingInfo);
        commandBuffers[currentFrame].bindPipeline(vk::PipelineBindPoint::eGraphics, *graphicsPipeline);
        commandBuffers[currentFrame].setViewport(0, vk::Viewport(0.0f, 0.0f, static_cast<float>(swapChainExtent.width), static_cast<float>(swapChainExtent.height), 0.0f, 1.0f));
        commandBuffers[currentFrame].setScissor(0, vk::Rect2D(vk::Offset2D(0, 0), swapChainExtent));
        commandBuffers[currentFrame].bindVertexBuffers(0, *vertexBuffer, {0});
        commandBuffers[currentFrame].bindIndexBuffer( *indexBuffer, 0, vk::IndexType::eUint32 );
        commandBuffers[currentFrame].bindDescriptorSets(vk::PipelineBindPoint::eGraphics, *pipelineLayout, 0, *descriptorSets[currentFrame], nullptr);
        commandBuffers[currentFrame].drawIndexed(indices.size(), 1, 0, 0, 0);
        commandBuffers[currentFrame].endRendering();
        transition_image_layout(
            imageIndex,
            vk::ImageLayout::eColorAttachmentOptimal,
            vk::ImageLayout::ePresentSrcKHR,
            vk::AccessFlagBits2::eColorAttachmentWrite,
            {},
            vk::PipelineStageFlagBits2::eColorAttachmentOutput,
            vk::PipelineStageFlagBits2::eBottomOfPipe
        );
        commandBuffers[currentFrame].end();
    }

    void transition_image_layout(
        uint32_t imageIndex,
        vk::ImageLayout old_layout,
        vk::ImageLayout new_layout,
        vk::AccessFlags2 src_access_mask,
        vk::AccessFlags2 dst_access_mask,
        vk::PipelineStageFlags2 src_stage_mask,
        vk::PipelineStageFlags2 dst_stage_mask
        ) {
        vk::ImageMemoryBarrier2 barrier = {
            .srcStageMask = src_stage_mask,
            .srcAccessMask = src_access_mask,
            .dstStageMask = dst_stage_mask,
            .dstAccessMask = dst_access_mask,
            .oldLayout = old_layout,
            .newLayout = new_layout,
            .srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
            .dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
            .image = swapChainImages[imageIndex],
            .subresourceRange = {
                .aspectMask = vk::ImageAspectFlagBits::eColor,
                .baseMipLevel = 0,
                .levelCount = 1,
                .baseArrayLayer = 0,
                .layerCount = 1
            }
        };
        vk::DependencyInfo dependency_info = {
            .dependencyFlags = {},
            .imageMemoryBarrierCount = 1,
            .pImageMemoryBarriers = &barrier
        };
        commandBuffers[currentFrame].pipelineBarrier2(dependency_info);
    }

    void createSyncObjects() {
        presentCompleteSemaphore.clear();
        renderFinishedSemaphore.clear();
        inFlightFences.clear();

        for (size_t i = 0; i < swapChainImages.size(); i++) {
            presentCompleteSemaphore.emplace_back(device, vk::SemaphoreCreateInfo());
            renderFinishedSemaphore.emplace_back(device, vk::SemaphoreCreateInfo());
        }


        for (size_t i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
            inFlightFences.emplace_back(device, vk::FenceCreateInfo{ .flags = vk::FenceCreateFlagBits::eSignaled });
        }
    }

    void updateUniformBuffer(uint32_t currentImage) const {
        static auto startTime = std::chrono::high_resolution_clock::now();

        auto currentTime = std::chrono::high_resolution_clock::now();
        float time = std::chrono::duration<float>(currentTime - startTime).count();

        UniformBufferObject ubo{};
        glm::mat4 initialRotation = glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), glm::vec3(1.0f, 0.0f, 0.0f));
        glm::mat4 continuousRotation = glm::rotate(glm::mat4(1.0f), time * glm::radians(90.0f), glm::vec3(0.0f, 0.0f, 1.0f));
        ubo.model = continuousRotation * initialRotation;
        ubo.view = lookAt(glm::vec3(2.0f, 2.0f, 2.0f), glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(0.0f, 0.0f, 1.0f));
        ubo.proj = glm::perspective(glm::radians(45.0f), static_cast<float>(swapChainExtent.width) / static_cast<float>(swapChainExtent.height), 0.1f, 10.0f);
        ubo.proj[1][1] *= -1;

        memcpy(uniformBuffersMapped[currentImage], &ubo, sizeof(ubo));
    }

    void drawFrame() {
        while ( vk::Result::eTimeout == device.waitForFences( *inFlightFences[currentFrame], vk::True, UINT64_MAX ) )
            ;
        auto [result, imageIndex] = swapChain.acquireNextImage( UINT64_MAX, *presentCompleteSemaphore[currentFrame], nullptr );

        if (result == vk::Result::eErrorOutOfDateKHR) {
            recreateSwapChain();
            return;
        }
        if (result != vk::Result::eSuccess && result != vk::Result::eSuboptimalKHR) {
            throw std::runtime_error("failed to acquire swap chain image!");
        }
        updateUniformBuffer(currentFrame);

        device.resetFences(  *inFlightFences[currentFrame] );
        commandBuffers[currentFrame].reset();
        recordCommandBuffer(imageIndex);

        vk::PipelineStageFlags waitDestinationStageMask( vk::PipelineStageFlagBits::eColorAttachmentOutput );
        const vk::SubmitInfo submitInfo{ .waitSemaphoreCount = 1, .pWaitSemaphores = &*presentCompleteSemaphore[currentFrame],
                            .pWaitDstStageMask = &waitDestinationStageMask, .commandBufferCount = 1, .pCommandBuffers = &*commandBuffers[currentFrame],
                            .signalSemaphoreCount = 1, .pSignalSemaphores = &*renderFinishedSemaphore[imageIndex] };
        queue.submit(submitInfo, *inFlightFences[currentFrame]);


        const vk::PresentInfoKHR presentInfoKHR{ .waitSemaphoreCount = 1, .pWaitSemaphores = &*renderFinishedSemaphore[imageIndex],
                                                .swapchainCount = 1, .pSwapchains = &*swapChain, .pImageIndices = &imageIndex };
        result = queue.presentKHR(presentInfoKHR);
        if (result == vk::Result::eErrorOutOfDateKHR || result == vk::Result::eSuboptimalKHR || framebufferResized) {
            framebufferResized = false;
            recreateSwapChain();
        } else if (result != vk::Result::eSuccess) {
            throw std::runtime_error("failed to present swap chain image!");
        }
        currentFrame = (currentFrame + 1) % MAX_FRAMES_IN_FLIGHT;
    }

    [[nodiscard]] vk::raii::ShaderModule createShaderModule(const std::vector<char>& code) const {
        vk::ShaderModuleCreateInfo createInfo{ .codeSize = code.size(), .pCode = reinterpret_cast<const uint32_t*>(code.data()) };
        vk::raii::ShaderModule shaderModule{ device, createInfo };

        return shaderModule;
    }

    static uint32_t chooseSwapMinImageCount(vk::SurfaceCapabilitiesKHR const & surfaceCapabilities) {
        auto minImageCount = std::max( 3u, surfaceCapabilities.minImageCount );
        if ((0 < surfaceCapabilities.maxImageCount) && (surfaceCapabilities.maxImageCount < minImageCount)) {
            minImageCount = surfaceCapabilities.maxImageCount;
        }
        return minImageCount;
    }

    static vk::SurfaceFormatKHR chooseSwapSurfaceFormat(const std::vector<vk::SurfaceFormatKHR>& availableFormats) {
        assert(!availableFormats.empty());
        const auto formatIt = std::ranges::find_if(
            availableFormats,
            []( const auto & format ) { return format.format == vk::Format::eB8G8R8A8Srgb && format.colorSpace == vk::ColorSpaceKHR::eSrgbNonlinear; } );
        return formatIt != availableFormats.end() ? *formatIt : availableFormats[0];
    }

    static vk::PresentModeKHR chooseSwapPresentMode(const std::vector<vk::PresentModeKHR>& availablePresentModes) {
        assert(std::ranges::any_of(availablePresentModes, [](auto presentMode){ return presentMode == vk::PresentModeKHR::eFifo; }));
        return std::ranges::any_of(availablePresentModes,
            [](const vk::PresentModeKHR value) { return vk::PresentModeKHR::eMailbox == value; } ) ? vk::PresentModeKHR::eMailbox : vk::PresentModeKHR::eFifo;
    }

    vk::Extent2D chooseSwapExtent(const vk::SurfaceCapabilitiesKHR& capabilities) {
        if (capabilities.currentExtent.width != 0xFFFFFFFF) {
            return capabilities.currentExtent;
        }
#if PLATFORM_DESKTOP
        int width, height;
        glfwGetFramebufferSize(window, &width, &height);
#else
        ANativeWindow* window = androidAppState.nativeWindow;
        int width = ANativeWindow_getWidth(window);
        int height = ANativeWindow_getHeight(window);
#endif
        return {
            std::clamp<uint32_t>(width, capabilities.minImageExtent.width, capabilities.maxImageExtent.width),
            std::clamp<uint32_t>(height, capabilities.minImageExtent.height, capabilities.maxImageExtent.height)
        };
    }

    [[nodiscard]] std::vector<const char*> getRequiredExtensions() const {
        std::vector<const char*> extensions;

#if PLATFORM_DESKTOP
        // Get GLFW extensions
        uint32_t glfwExtensionCount = 0;
        auto glfwExtensions = glfwGetRequiredInstanceExtensions(&glfwExtensionCount);
        extensions.assign(glfwExtensions, glfwExtensions + glfwExtensionCount);
#else
        // Android extensions
        extensions.push_back(VK_KHR_SURFACE_EXTENSION_NAME);
        extensions.push_back(VK_KHR_ANDROID_SURFACE_EXTENSION_NAME);
#endif

        // Add debug extensions if validation layers are enabled
        if (enableValidationLayers) {
            extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
        }

        return extensions;
    }

    [[nodiscard]] bool checkValidationLayerSupport() const {
        return (std::ranges::any_of(context.enumerateInstanceLayerProperties(),
        []( vk::LayerProperties const & lp ) { return ( strcmp( "VK_LAYER_KHRONOS_validation", lp.layerName ) == 0 ); } ) );
    }

    static VKAPI_ATTR vk::Bool32 VKAPI_CALL debugCallback(vk::DebugUtilsMessageSeverityFlagBitsEXT severity, vk::DebugUtilsMessageTypeFlagsEXT type, const vk::DebugUtilsMessengerCallbackDataEXT* pCallbackData, void*) {
        if (severity == vk::DebugUtilsMessageSeverityFlagBitsEXT::eError || severity == vk::DebugUtilsMessageSeverityFlagBitsEXT::eWarning) {
            std::cerr << "validation layer: type " << to_string(type) << " msg: " << pCallbackData->pMessage << std::endl;
        }

        return vk::False;
    }

    std::vector<char> readFile(const std::string& filename) {
#if PLATFORM_ANDROID
        // Android asset loading
        if (androidAppState.app == nullptr) {
            LOGE("Android app not initialized");
            throw std::runtime_error("Android app not initialized");
        }
        AAsset* asset = AAssetManager_open(androidAppState.app->activity->assetManager, filename.c_str(), AASSET_MODE_BUFFER);
        if (!asset) {
            throw std::runtime_error("failed to open file: " + filename);
        }

        size_t size = AAsset_getLength(asset);
        std::vector<char> buffer(size);
        AAsset_read(asset, buffer.data(), size);
        AAsset_close(asset);
#else
        // Desktop file loading
        std::ifstream file(filename, std::ios::ate | std::ios::binary);
        if (!file.is_open()) {
            throw std::runtime_error("failed to open file: " + filename);
        }

        size_t fileSize = static_cast<size_t>(file.tellg());
        std::vector<char> buffer(fileSize);
        file.seekg(0);
        file.read(buffer.data(), fileSize);
        file.close();
#endif
        return buffer;
    }
};

#if PLATFORM_ANDROID
void android_main(android_app* app) {
    app_dummy();

    VulkanApplication vulkanApp;
    vulkanApp.run(app);
}
#else
int main() {
    try {
        VulkanApplication app;
        app.run();
    } catch (const std::exception& e) {
        LOGE("%s", e.what());
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}
#endif