[chore]: MASSIVE refactor + more vulkan bs

1 files changed, 0 insertions, 1235 deletions

diff --git a/src/Platform/Vulkan/VulkanRenderer.cpp b/src/Platform/Vulkan/VulkanRenderer.cpp
deleted file mode 100644
index eb92695..0000000
--- a/src/Platform/Vulkan/VulkanRenderer.cpp
+++ /dev/null
@@ -1,1235 +0,0 @@
-#include "VulkanRenderer.h"
-#include "Core/Log.h"
-#include "Core/Camera.h"
-
-#define GLFW_INCLUDE_VULKAN
-#include <GLFW/glfw3.h>
-
-#include <imgui.h>
-#include <imgui_impl_glfw.h>
-#include <imgui_impl_vulkan.h>
-
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include "stb_image.h"
-
-#include <vector>
-#include <algorithm>
-#include <cstring>
-#include <cstdlib>
-#include <fstream>
-
-namespace Donut
-{
-    #define VK_CHECK(expr)                                                     \
-        do {                                                                   \
-            VkResult _r = (expr);                                              \
-            if (_r != VK_SUCCESS) {                                            \
-                DONUT_ERROR("Vulkan: {} failed ({})", #expr, (int)_r);         \
-                return false;                                                  \
-            }                                                                  \
-        } while (0)
-
-    static constexpr int MAX_FRAMES_IN_FLIGHT = 2;
-
-    void VulkanPrepareGLFW()
-    {
-#ifdef __APPLE__
-        if (!getenv("VK_ICD_FILENAMES"))
-            setenv("VK_ICD_FILENAMES", "/opt/homebrew/etc/vulkan/icd.d/MoltenVK_icd.json", 0);
-        if (!getenv("VK_LAYER_PATH"))
-            setenv("VK_LAYER_PATH", "/opt/homebrew/share/vulkan/explicit_layer.d", 0);
-        if (!getenv("DYLD_LIBRARY_PATH"))
-            setenv("DYLD_LIBRARY_PATH", "/opt/homebrew/lib", 0);
-#endif
-        // GLFW dlopen's the Vulkan loader by bare name, which fails on
-        // macOS/Homebrew; hand it the loader entry point we already link against.
-        glfwInitVulkanLoader(vkGetInstanceProcAddr);
-    }
-
-    struct VulkanRenderer::Impl
-    {
-        GLFWwindow* window = nullptr;
-        int width = 0, height = 0;
-        bool framebufferResized = false;
-
-        VkInstance       instance = VK_NULL_HANDLE;
-        VkSurfaceKHR     surface  = VK_NULL_HANDLE;
-        VkPhysicalDevice physical = VK_NULL_HANDLE;
-        VkDevice         device   = VK_NULL_HANDLE;
-        uint32_t         graphicsFamily = 0, presentFamily = 0;
-        VkQueue          graphicsQueue = VK_NULL_HANDLE, presentQueue = VK_NULL_HANDLE;
-
-        VkSwapchainKHR   swapchain = VK_NULL_HANDLE;
-        VkFormat         swapchainFormat = VK_FORMAT_B8G8R8A8_UNORM;
-        VkExtent2D       swapchainExtent{};
-        std::vector<VkImage>       images;
-        std::vector<VkImageView>   imageViews;
-        VkRenderPass               renderPass = VK_NULL_HANDLE;
-        std::vector<VkFramebuffer> framebuffers;
-
-        VkCommandPool                commandPool = VK_NULL_HANDLE;
-        std::vector<VkCommandBuffer> commandBuffers;   // MAX_FRAMES_IN_FLIGHT
-
-        std::vector<VkSemaphore> imageAvailable;        // per frame in flight
-        std::vector<VkSemaphore> renderFinished;        // per swapchain image
-        std::vector<VkFence>     inFlight;              // per frame in flight
-        std::vector<VkFence>     imagesInFlight;        // per swapchain image
-        uint32_t currentFrame = 0;
-
-        VkDescriptorPool imguiPool = VK_NULL_HANDLE;
-        bool imguiInit = false;
-
-        VkPhysicalDeviceMemoryProperties memProps{};
-
-        // Geodesic scene, rendered every frame into a fixed low-resolution
-        // offscreen image (keeps each draw well under the Metal GPU watchdog),
-        // then upscaled onto the swapchain by the present pass below.
-        static constexpr uint32_t GEO_W = 480, GEO_H = 270;
-        VkImage       geoImage     = VK_NULL_HANDLE;
-        VkDeviceMemory geoImageMem = VK_NULL_HANDLE;
-        VkImageView   geoImageView = VK_NULL_HANDLE;
-        VkRenderPass  geoRenderPass = VK_NULL_HANDLE;
-        VkFramebuffer geoFramebuffer = VK_NULL_HANDLE;
-        VkBuffer camBuf = VK_NULL_HANDLE, diskBuf = VK_NULL_HANDLE, objBuf = VK_NULL_HANDLE, simBuf = VK_NULL_HANDLE;
-        VkDeviceMemory camMem = VK_NULL_HANDLE, diskMem = VK_NULL_HANDLE, objMem = VK_NULL_HANDLE, simMem = VK_NULL_HANDLE;
-        void* camMapped = nullptr;
-        void* simMapped = nullptr;
-        Camera camera{ 60.0f, (float)GEO_W / (float)GEO_H, 0.1f, 100.0f };
-        bool leftWasDown = false;
-        VkImage cubeImage = VK_NULL_HANDLE; VkDeviceMemory cubeMem = VK_NULL_HANDLE;
-        VkImageView cubeView = VK_NULL_HANDLE; VkSampler cubeSampler = VK_NULL_HANDLE;
-        VkDescriptorSetLayout geoSetLayout = VK_NULL_HANDLE;
-        VkDescriptorPool geoPool = VK_NULL_HANDLE;
-        VkDescriptorSet geoSet = VK_NULL_HANDLE;
-        VkPipelineLayout geoPipelineLayout = VK_NULL_HANDLE;
-        VkPipeline geoPipeline = VK_NULL_HANDLE;
-        VkBuffer quadVB = VK_NULL_HANDLE; VkDeviceMemory quadVBMem = VK_NULL_HANDLE;
-        double startTime = 0.0;
-        VkFence geoInUse = VK_NULL_HANDLE;  // previous frame's fence; guards the shared geodesic image
-
-        // Present pass: samples the geodesic image with a full-screen textured
-        // quad, drawn into the swapchain render pass just before the ImGui UI.
-        VkSampler presentSampler = VK_NULL_HANDLE;
-        VkDescriptorSetLayout presentSetLayout = VK_NULL_HANDLE;
-        VkDescriptorPool presentPool = VK_NULL_HANDLE;
-        VkDescriptorSet presentSet = VK_NULL_HANDLE;
-        VkPipelineLayout presentPipelineLayout = VK_NULL_HANDLE;
-        VkPipeline presentPipeline = VK_NULL_HANDLE;
-
-        uint32_t FindMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags flags) const;
-        bool CreateBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags props, VkBuffer& buf, VkDeviceMemory& mem) const;
-        static std::vector<uint32_t> LoadSpirv(const std::string& path);
-        bool CreateShaderModule(const std::string& path, VkShaderModule& out) const;
-
-        bool CreateInstance();
-        bool PickPhysicalAndDevice();
-        bool CreateSwapchain();
-        bool CreateImageViews();
-        bool CreateRenderPass();
-        bool CreateFramebuffers();
-        bool CreateCommandBuffers();
-        bool CreateSyncObjects();
-        bool CreateGeodesicResources();
-        bool CreateHDRICubemap(const char* path);
-        bool CreatePresentResources();
-        void ProcessInput();
-        void UpdateGeodesicUniforms();
-        void DestroyGeodesicResources();
-        bool RecreateSwapchain();
-        void CleanupSwapchain();
-        bool RecordCommandBuffer(VkCommandBuffer cmd, uint32_t imageIndex, const glm::vec4& clear, ImDrawData* drawData);
-    };
-
-    bool VulkanRenderer::Impl::CreateInstance()
-    {
-#ifdef __APPLE__
-        if (!getenv("VK_ICD_FILENAMES"))
-            setenv("VK_ICD_FILENAMES", "/opt/homebrew/etc/vulkan/icd.d/MoltenVK_icd.json", 0);
-        if (!getenv("VK_LAYER_PATH"))
-            setenv("VK_LAYER_PATH", "/opt/homebrew/share/vulkan/explicit_layer.d", 0);
-        // The Homebrew validation-layer manifest names the dylib without a path;
-        // let dlopen find it in the Homebrew lib dir.
-        if (!getenv("DYLD_LIBRARY_PATH"))
-            setenv("DYLD_LIBRARY_PATH", "/opt/homebrew/lib", 0);
-#endif
-        VkApplicationInfo app{ VK_STRUCTURE_TYPE_APPLICATION_INFO };
-        app.pApplicationName = "Donut";
-        app.apiVersion       = VK_API_VERSION_1_2;
-
-        uint32_t glfwExtCount = 0;
-        const char** glfwExts = glfwGetRequiredInstanceExtensions(&glfwExtCount);
-        if (!glfwExts) { DONUT_ERROR("Vulkan: GLFW reports no surface support"); return false; }
-        std::vector<const char*> exts;
-        for (uint32_t i = 0; i < glfwExtCount; ++i) exts.push_back(glfwExts[i]);
-        exts.push_back(VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME);
-        exts.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);
-
-        std::vector<const char*> layers;
-        uint32_t layerCount = 0;
-        vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
-        std::vector<VkLayerProperties> avail(layerCount);
-        vkEnumerateInstanceLayerProperties(&layerCount, avail.data());
-        for (const auto& l : avail)
-            if (std::strcmp(l.layerName, "VK_LAYER_KHRONOS_validation") == 0)
-                layers.push_back("VK_LAYER_KHRONOS_validation");
-
-        VkInstanceCreateInfo ici{ VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO };
-        ici.flags                   = VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR;
-        ici.pApplicationInfo        = &app;
-        ici.enabledExtensionCount   = (uint32_t)exts.size();
-        ici.ppEnabledExtensionNames = exts.data();
-        ici.enabledLayerCount       = (uint32_t)layers.size();
-        ici.ppEnabledLayerNames     = layers.data();
-
-        VkResult r = vkCreateInstance(&ici, nullptr, &instance);
-        if (r != VK_SUCCESS && !layers.empty())
-        {
-            // The validation layer failed to load (its dylib isn't on the loader
-            // search path); it is optional, so retry without it.
-            DONUT_WARN("Vulkan: validation layer unavailable, continuing without it");
-            layers.clear();
-            ici.enabledLayerCount = 0;
-            ici.ppEnabledLayerNames = nullptr;
-            r = vkCreateInstance(&ici, nullptr, &instance);
-        }
-        if (r != VK_SUCCESS) { DONUT_ERROR("Vulkan: vkCreateInstance failed ({})", (int)r); return false; }
-
-        VK_CHECK(glfwCreateWindowSurface(instance, window, nullptr, &surface));
-        DONUT_INFO("Vulkan: instance + surface created (validation {})", layers.empty() ? "off" : "on");
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::PickPhysicalAndDevice()
-    {
-        uint32_t count = 0;
-        vkEnumeratePhysicalDevices(instance, &count, nullptr);
-        if (count == 0) { DONUT_ERROR("Vulkan: no physical devices"); return false; }
-        std::vector<VkPhysicalDevice> devices(count);
-        vkEnumeratePhysicalDevices(instance, &count, devices.data());
-        physical = devices[0];
-
-        uint32_t qCount = 0;
-        vkGetPhysicalDeviceQueueFamilyProperties(physical, &qCount, nullptr);
-        std::vector<VkQueueFamilyProperties> qfams(qCount);
-        vkGetPhysicalDeviceQueueFamilyProperties(physical, &qCount, qfams.data());
-        bool foundG = false, foundP = false;
-        for (uint32_t i = 0; i < qCount; ++i)
-        {
-            if (!foundG && (qfams[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)) { graphicsFamily = i; foundG = true; }
-            VkBool32 present = VK_FALSE;
-            vkGetPhysicalDeviceSurfaceSupportKHR(physical, i, surface, &present);
-            if (!foundP && present) { presentFamily = i; foundP = true; }
-        }
-        if (!foundG || !foundP) { DONUT_ERROR("Vulkan: no graphics/present queue"); return false; }
-
-        std::vector<const char*> devExts = { VK_KHR_SWAPCHAIN_EXTENSION_NAME };
-        uint32_t devExtCount = 0;
-        vkEnumerateDeviceExtensionProperties(physical, nullptr, &devExtCount, nullptr);
-        std::vector<VkExtensionProperties> devExtProps(devExtCount);
-        vkEnumerateDeviceExtensionProperties(physical, nullptr, &devExtCount, devExtProps.data());
-        for (const auto& e : devExtProps)
-            if (std::strcmp(e.extensionName, "VK_KHR_portability_subset") == 0)
-                devExts.push_back("VK_KHR_portability_subset");
-
-        float priority = 1.0f;
-        std::vector<VkDeviceQueueCreateInfo> qcis;
-        uint32_t families[2] = { graphicsFamily, presentFamily };
-        for (uint32_t i = 0; i < (graphicsFamily == presentFamily ? 1u : 2u); ++i)
-        {
-            VkDeviceQueueCreateInfo qci{ VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO };
-            qci.queueFamilyIndex = families[i];
-            qci.queueCount = 1;
-            qci.pQueuePriorities = &priority;
-            qcis.push_back(qci);
-        }
-        VkDeviceCreateInfo dci{ VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO };
-        dci.queueCreateInfoCount    = (uint32_t)qcis.size();
-        dci.pQueueCreateInfos       = qcis.data();
-        dci.enabledExtensionCount   = (uint32_t)devExts.size();
-        dci.ppEnabledExtensionNames = devExts.data();
-        VK_CHECK(vkCreateDevice(physical, &dci, nullptr, &device));
-        vkGetDeviceQueue(device, graphicsFamily, 0, &graphicsQueue);
-        vkGetDeviceQueue(device, presentFamily, 0, &presentQueue);
-
-        VkPhysicalDeviceProperties props{};
-        vkGetPhysicalDeviceProperties(physical, &props);
-        vkGetPhysicalDeviceMemoryProperties(physical, &memProps);
-        DONUT_INFO("Vulkan device: {}", props.deviceName);
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateSwapchain()
-    {
-        VkSurfaceCapabilitiesKHR caps{};
-        vkGetPhysicalDeviceSurfaceCapabilitiesKHR(physical, surface, &caps);
-
-        uint32_t fmtCount = 0;
-        vkGetPhysicalDeviceSurfaceFormatsKHR(physical, surface, &fmtCount, nullptr);
-        std::vector<VkSurfaceFormatKHR> formats(fmtCount);
-        vkGetPhysicalDeviceSurfaceFormatsKHR(physical, surface, &fmtCount, formats.data());
-        VkSurfaceFormatKHR chosen = formats[0];
-        for (const auto& f : formats)
-            if (f.format == VK_FORMAT_B8G8R8A8_UNORM && f.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR)
-                chosen = f;
-        swapchainFormat = chosen.format;
-
-        if (caps.currentExtent.width != UINT32_MAX)
-            swapchainExtent = caps.currentExtent;
-        else
-        {
-            swapchainExtent.width  = std::clamp((uint32_t)width,  caps.minImageExtent.width,  caps.maxImageExtent.width);
-            swapchainExtent.height = std::clamp((uint32_t)height, caps.minImageExtent.height, caps.maxImageExtent.height);
-        }
-
-        uint32_t imageCount = caps.minImageCount + 1;
-        if (caps.maxImageCount > 0 && imageCount > caps.maxImageCount)
-            imageCount = caps.maxImageCount;
-
-        VkSwapchainCreateInfoKHR sci{ VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR };
-        sci.surface          = surface;
-        sci.minImageCount    = imageCount;
-        sci.imageFormat      = chosen.format;
-        sci.imageColorSpace  = chosen.colorSpace;
-        sci.imageExtent      = swapchainExtent;
-        sci.imageArrayLayers = 1;
-        sci.imageUsage       = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
-        sci.preTransform     = caps.currentTransform;
-        sci.compositeAlpha   = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
-        sci.presentMode      = VK_PRESENT_MODE_FIFO_KHR;   // always supported, vsync
-        sci.clipped          = VK_TRUE;
-
-        uint32_t famIdx[2] = { graphicsFamily, presentFamily };
-        if (graphicsFamily != presentFamily)
-        {
-            sci.imageSharingMode      = VK_SHARING_MODE_CONCURRENT;
-            sci.queueFamilyIndexCount = 2;
-            sci.pQueueFamilyIndices   = famIdx;
-        }
-        else
-            sci.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
-
-        VK_CHECK(vkCreateSwapchainKHR(device, &sci, nullptr, &swapchain));
-        uint32_t n = 0;
-        vkGetSwapchainImagesKHR(device, swapchain, &n, nullptr);
-        images.resize(n);
-        vkGetSwapchainImagesKHR(device, swapchain, &n, images.data());
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateImageViews()
-    {
-        imageViews.resize(images.size());
-        for (size_t i = 0; i < images.size(); ++i)
-        {
-            VkImageViewCreateInfo vci{ VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
-            vci.image = images[i];
-            vci.viewType = VK_IMAGE_VIEW_TYPE_2D;
-            vci.format = swapchainFormat;
-            vci.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
-            VK_CHECK(vkCreateImageView(device, &vci, nullptr, &imageViews[i]));
-        }
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateRenderPass()
-    {
-        VkAttachmentDescription color{};
-        color.format = swapchainFormat;
-        color.samples = VK_SAMPLE_COUNT_1_BIT;
-        color.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
-        color.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
-        color.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
-        color.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
-        color.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
-        color.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
-
-        VkAttachmentReference ref{ 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
-        VkSubpassDescription subpass{};
-        subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
-        subpass.colorAttachmentCount = 1;
-        subpass.pColorAttachments = &ref;
-
-        VkSubpassDependency dep{};
-        dep.srcSubpass = VK_SUBPASS_EXTERNAL;
-        dep.dstSubpass = 0;
-        dep.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
-        dep.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
-        dep.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
-
-        VkRenderPassCreateInfo rpci{ VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO };
-        rpci.attachmentCount = 1; rpci.pAttachments = &color;
-        rpci.subpassCount = 1; rpci.pSubpasses = &subpass;
-        rpci.dependencyCount = 1; rpci.pDependencies = &dep;
-        VK_CHECK(vkCreateRenderPass(device, &rpci, nullptr, &renderPass));
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateFramebuffers()
-    {
-        framebuffers.resize(imageViews.size());
-        for (size_t i = 0; i < imageViews.size(); ++i)
-        {
-            VkFramebufferCreateInfo fbci{ VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO };
-            fbci.renderPass = renderPass;
-            fbci.attachmentCount = 1; fbci.pAttachments = &imageViews[i];
-            fbci.width = swapchainExtent.width; fbci.height = swapchainExtent.height; fbci.layers = 1;
-            VK_CHECK(vkCreateFramebuffer(device, &fbci, nullptr, &framebuffers[i]));
-        }
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateCommandBuffers()
-    {
-        VkCommandPoolCreateInfo pci{ VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO };
-        pci.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
-        pci.queueFamilyIndex = graphicsFamily;
-        VK_CHECK(vkCreateCommandPool(device, &pci, nullptr, &commandPool));
-
-        commandBuffers.resize(MAX_FRAMES_IN_FLIGHT);
-        VkCommandBufferAllocateInfo cbai{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
-        cbai.commandPool = commandPool;
-        cbai.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
-        cbai.commandBufferCount = MAX_FRAMES_IN_FLIGHT;
-        VK_CHECK(vkAllocateCommandBuffers(device, &cbai, commandBuffers.data()));
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateSyncObjects()
-    {
-        imageAvailable.resize(MAX_FRAMES_IN_FLIGHT);
-        inFlight.resize(MAX_FRAMES_IN_FLIGHT);
-        renderFinished.resize(images.size());
-        imagesInFlight.assign(images.size(), VK_NULL_HANDLE);
-
-        VkSemaphoreCreateInfo sci{ VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO };
-        VkFenceCreateInfo fci{ VK_STRUCTURE_TYPE_FENCE_CREATE_INFO };
-        fci.flags = VK_FENCE_CREATE_SIGNALED_BIT;
-        for (int i = 0; i < MAX_FRAMES_IN_FLIGHT; ++i)
-        {
-            VK_CHECK(vkCreateSemaphore(device, &sci, nullptr, &imageAvailable[i]));
-            VK_CHECK(vkCreateFence(device, &fci, nullptr, &inFlight[i]));
-        }
-        for (size_t i = 0; i < images.size(); ++i)
-            VK_CHECK(vkCreateSemaphore(device, &sci, nullptr, &renderFinished[i]));
-        return true;
-    }
-
-    uint32_t VulkanRenderer::Impl::FindMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags flags) const
-    {
-        for (uint32_t i = 0; i < memProps.memoryTypeCount; ++i)
-            if ((typeFilter & (1u << i)) && (memProps.memoryTypes[i].propertyFlags & flags) == flags)
-                return i;
-        return UINT32_MAX;
-    }
-
-    bool VulkanRenderer::Impl::CreateBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags props,
-                                            VkBuffer& buf, VkDeviceMemory& mem) const
-    {
-        VkBufferCreateInfo bci{ VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
-        bci.size = size; bci.usage = usage; bci.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
-        if (vkCreateBuffer(device, &bci, nullptr, &buf) != VK_SUCCESS) return false;
-        VkMemoryRequirements req{}; vkGetBufferMemoryRequirements(device, buf, &req);
-        VkMemoryAllocateInfo ai{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };
-        ai.allocationSize = req.size;
-        ai.memoryTypeIndex = FindMemoryType(req.memoryTypeBits, props);
-        if (vkAllocateMemory(device, &ai, nullptr, &mem) != VK_SUCCESS) return false;
-        vkBindBufferMemory(device, buf, mem, 0);
-        return true;
-    }
-
-    std::vector<uint32_t> VulkanRenderer::Impl::LoadSpirv(const std::string& path)
-    {
-        std::ifstream file(path, std::ios::ate | std::ios::binary);
-        if (!file.is_open()) return {};
-        size_t size = (size_t)file.tellg();
-        std::vector<uint32_t> data(size / 4);
-        file.seekg(0);
-        file.read(reinterpret_cast<char*>(data.data()), size);
-        return data;
-    }
-
-    bool VulkanRenderer::Impl::CreateShaderModule(const std::string& path, VkShaderModule& out) const
-    {
-        auto spv = LoadSpirv(path);
-        if (spv.empty()) { DONUT_ERROR("Vulkan: failed to load SPIR-V {}", path); return false; }
-        VkShaderModuleCreateInfo ci{ VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO };
-        ci.codeSize = spv.size() * 4; ci.pCode = spv.data();
-        return vkCreateShaderModule(device, &ci, nullptr, &out) == VK_SUCCESS;
-    }
-
-    bool VulkanRenderer::Impl::CreateGeodesicResources()
-    {
-        const VkFormat fmt = VK_FORMAT_R8G8B8A8_UNORM;
-        const VkMemoryPropertyFlags hostVis = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
-        const float SagA_rs = 1.269e10f;
-
-        VkImageCreateInfo ici{ VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
-        ici.imageType = VK_IMAGE_TYPE_2D; ici.format = fmt; ici.extent = { GEO_W, GEO_H, 1 };
-        ici.mipLevels = 1; ici.arrayLayers = 1; ici.samples = VK_SAMPLE_COUNT_1_BIT;
-        ici.tiling = VK_IMAGE_TILING_OPTIMAL;
-        ici.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
-        VK_CHECK(vkCreateImage(device, &ici, nullptr, &geoImage));
-        VkMemoryRequirements imReq{}; vkGetImageMemoryRequirements(device, geoImage, &imReq);
-        VkMemoryAllocateInfo imAlloc{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };
-        imAlloc.allocationSize = imReq.size;
-        imAlloc.memoryTypeIndex = FindMemoryType(imReq.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
-        VK_CHECK(vkAllocateMemory(device, &imAlloc, nullptr, &geoImageMem));
-        VK_CHECK(vkBindImageMemory(device, geoImage, geoImageMem, 0));
-        VkImageViewCreateInfo vci{ VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
-        vci.image = geoImage; vci.viewType = VK_IMAGE_VIEW_TYPE_2D; vci.format = fmt;
-        vci.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
-        VK_CHECK(vkCreateImageView(device, &vci, nullptr, &geoImageView));
-
-        VkAttachmentDescription color{};
-        color.format = fmt; color.samples = VK_SAMPLE_COUNT_1_BIT;
-        color.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR; color.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
-        color.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE; color.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
-        color.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED; color.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
-        VkAttachmentReference ref{ 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
-        VkSubpassDescription subpass{}; subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
-        subpass.colorAttachmentCount = 1; subpass.pColorAttachments = &ref;
-        VkSubpassDependency deps[2]{};
-        deps[0].srcSubpass = VK_SUBPASS_EXTERNAL; deps[0].dstSubpass = 0;
-        deps[0].srcStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT; deps[0].srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
-        deps[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; deps[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
-        deps[1].srcSubpass = 0; deps[1].dstSubpass = VK_SUBPASS_EXTERNAL;
-        deps[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; deps[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
-        deps[1].dstStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT; deps[1].dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
-        VkRenderPassCreateInfo rpci{ VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO };
-        rpci.attachmentCount = 1; rpci.pAttachments = &color;
-        rpci.subpassCount = 1; rpci.pSubpasses = &subpass;
-        rpci.dependencyCount = 2; rpci.pDependencies = deps;
-        VK_CHECK(vkCreateRenderPass(device, &rpci, nullptr, &geoRenderPass));
-        VkFramebufferCreateInfo fbci{ VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO };
-        fbci.renderPass = geoRenderPass; fbci.attachmentCount = 1; fbci.pAttachments = &geoImageView;
-        fbci.width = GEO_W; fbci.height = GEO_H; fbci.layers = 1;
-        VK_CHECK(vkCreateFramebuffer(device, &fbci, nullptr, &geoFramebuffer));
-
-        CreateBuffer(128, VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, hostVis, camBuf, camMem);
-        CreateBuffer(32,  VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, hostVis, diskBuf, diskMem);
-        CreateBuffer(800, VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, hostVis, objBuf, objMem);
-        CreateBuffer(16,  VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, hostVis, simBuf, simMem);
-
-        camera.SetCameraMode(CameraMode::Orbital);
-        camera.SetOrbitalTarget(glm::vec3(0.0f));
-        camera.SetOrbitalRadius(1e11);
-        camera.SetOrbitalLimits(4e10, 3e11);
-        camera.SetOrbitalSpeed(0.01f);
-        camera.SetZoomSpeed(1e10);
-        camera.SetAzimuth(0.0f);
-        camera.SetElevation(1.25f);
-
-        void* p = nullptr;
-        vkMapMemory(device, camMem, 0, 128, 0, &camMapped);  // camera UBO is refilled every frame
-
-        float diskData[8] = { SagA_rs * 2.2f, SagA_rs * 5.2f, 2.0f, SagA_rs * 0.1f, 0.1f, 0, 0, 0 };
-        vkMapMemory(device, diskMem, 0, 32, 0, &p); memcpy(p, diskData, sizeof(diskData)); vkUnmapMemory(device, diskMem);
-
-        std::vector<uint8_t> objData(800, 0);
-        int numObjects = 1; memcpy(objData.data(), &numObjects, 4);
-        float posRadius[4] = { 0, 0, 0, SagA_rs }; memcpy(objData.data() + 16, posRadius, 16);
-        float objColor[4] = { 0, 0, 0, 1 };        memcpy(objData.data() + 272, objColor, 16);
-        vkMapMemory(device, objMem, 0, 800, 0, &p); memcpy(p, objData.data(), 800); vkUnmapMemory(device, objMem);
-
-        vkMapMemory(device, simMem, 0, 16, 0, &simMapped);
-
-        if (!CreateHDRICubemap("Assets/HDRI/HDR_blue_nebulae-1.hdr")) return false;
-
-        VkDescriptorSetLayoutBinding binds[5]{};
-        for (int i = 0; i < 4; ++i) { binds[i].binding = i; binds[i].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER; binds[i].descriptorCount = 1; binds[i].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT; }
-        binds[4].binding = 4; binds[4].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; binds[4].descriptorCount = 1; binds[4].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
-        VkDescriptorSetLayoutCreateInfo dslci{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO };
-        dslci.bindingCount = 5; dslci.pBindings = binds;
-        VK_CHECK(vkCreateDescriptorSetLayout(device, &dslci, nullptr, &geoSetLayout));
-        VkDescriptorPoolSize psizes[2] = { { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 4 }, { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1 } };
-        VkDescriptorPoolCreateInfo dpci{ VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO };
-        dpci.maxSets = 1; dpci.poolSizeCount = 2; dpci.pPoolSizes = psizes;
-        VK_CHECK(vkCreateDescriptorPool(device, &dpci, nullptr, &geoPool));
-        VkDescriptorSetAllocateInfo dsai{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO };
-        dsai.descriptorPool = geoPool; dsai.descriptorSetCount = 1; dsai.pSetLayouts = &geoSetLayout;
-        VK_CHECK(vkAllocateDescriptorSets(device, &dsai, &geoSet));
-        VkDescriptorBufferInfo bi[4] = { { camBuf, 0, VK_WHOLE_SIZE }, { diskBuf, 0, VK_WHOLE_SIZE }, { objBuf, 0, VK_WHOLE_SIZE }, { simBuf, 0, VK_WHOLE_SIZE } };
-        VkDescriptorImageInfo cubeInfo{ cubeSampler, cubeView, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
-        VkWriteDescriptorSet writes[5]{};
-        for (int i = 0; i < 4; ++i) { writes[i].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET; writes[i].dstSet = geoSet; writes[i].dstBinding = i; writes[i].descriptorCount = 1; writes[i].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER; writes[i].pBufferInfo = &bi[i]; }
-        writes[4].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET; writes[4].dstSet = geoSet; writes[4].dstBinding = 4; writes[4].descriptorCount = 1; writes[4].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; writes[4].pImageInfo = &cubeInfo;
-        vkUpdateDescriptorSets(device, 5, writes, 0, nullptr);
-
-        float quad[] = {
-            -1.f,  1.f, 0.f, 1.f,  -1.f, -1.f, 0.f, 0.f,   1.f, -1.f, 1.f, 0.f,
-            -1.f,  1.f, 0.f, 1.f,   1.f, -1.f, 1.f, 0.f,   1.f,  1.f, 1.f, 1.f,
-        };
-        CreateBuffer(sizeof(quad), VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, hostVis, quadVB, quadVBMem);
-        vkMapMemory(device, quadVBMem, 0, sizeof(quad), 0, &p); memcpy(p, quad, sizeof(quad)); vkUnmapMemory(device, quadVBMem);
-
-        VkShaderModule vmod, fmod;
-        if (!CreateShaderModule("Assets/Shaders/generated/Geodesic.vertexMain.spv", vmod)) return false;
-        if (!CreateShaderModule("Assets/Shaders/generated/Geodesic.fragmentMain.spv", fmod)) return false;
-        VkPipelineLayoutCreateInfo plci{ VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO };
-        plci.setLayoutCount = 1; plci.pSetLayouts = &geoSetLayout;
-        VK_CHECK(vkCreatePipelineLayout(device, &plci, nullptr, &geoPipelineLayout));
-        VkPipelineShaderStageCreateInfo stages[2]{};
-        stages[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[0].stage = VK_SHADER_STAGE_VERTEX_BIT;   stages[0].module = vmod; stages[0].pName = "main";
-        stages[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT; stages[1].module = fmod; stages[1].pName = "main";
-        VkVertexInputBindingDescription vib{ 0, 16, VK_VERTEX_INPUT_RATE_VERTEX };
-        VkVertexInputAttributeDescription via[2] = { { 0, 0, VK_FORMAT_R32G32_SFLOAT, 0 }, { 1, 0, VK_FORMAT_R32G32_SFLOAT, 8 } };
-        VkPipelineVertexInputStateCreateInfo vin{ VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO };
-        vin.vertexBindingDescriptionCount = 1; vin.pVertexBindingDescriptions = &vib;
-        vin.vertexAttributeDescriptionCount = 2; vin.pVertexAttributeDescriptions = via;
-        VkPipelineInputAssemblyStateCreateInfo ia{ VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO }; ia.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
-        VkViewport vp{ 0, 0, (float)GEO_W, (float)GEO_H, 0, 1 }; VkRect2D sc{ { 0, 0 }, { GEO_W, GEO_H } };
-        VkPipelineViewportStateCreateInfo vps{ VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO }; vps.viewportCount = 1; vps.pViewports = &vp; vps.scissorCount = 1; vps.pScissors = &sc;
-        VkPipelineRasterizationStateCreateInfo rs{ VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO }; rs.polygonMode = VK_POLYGON_MODE_FILL; rs.cullMode = VK_CULL_MODE_NONE; rs.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE; rs.lineWidth = 1.0f;
-        VkPipelineMultisampleStateCreateInfo ms{ VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO }; ms.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
-        VkPipelineColorBlendAttachmentState cba{}; cba.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
-        VkPipelineColorBlendStateCreateInfo cb{ VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO }; cb.attachmentCount = 1; cb.pAttachments = &cba;
-        VkGraphicsPipelineCreateInfo gpci{ VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO };
-        gpci.stageCount = 2; gpci.pStages = stages;
-        gpci.pVertexInputState = &vin; gpci.pInputAssemblyState = &ia; gpci.pViewportState = &vps;
-        gpci.pRasterizationState = &rs; gpci.pMultisampleState = &ms; gpci.pColorBlendState = &cb;
-        gpci.layout = geoPipelineLayout; gpci.renderPass = geoRenderPass; gpci.subpass = 0;
-        VkResult pr = vkCreateGraphicsPipelines(device, VK_NULL_HANDLE, 1, &gpci, nullptr, &geoPipeline);
-        vkDestroyShaderModule(device, vmod, nullptr); vkDestroyShaderModule(device, fmod, nullptr);
-        if (pr != VK_SUCCESS) { DONUT_ERROR("Vulkan: geodesic pipeline creation failed ({})", (int)pr); return false; }
-
-        startTime = glfwGetTime();
-        UpdateGeodesicUniforms();
-        DONUT_INFO("Vulkan: geodesic resources ready ({}x{} offscreen)", (int)GEO_W, (int)GEO_H);
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreateHDRICubemap(const char* path)
-    {
-        const VkMemoryPropertyFlags hostVis = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
-        const uint32_t FACE = 1024;
-        const VkFormat cubeFmt = VK_FORMAT_R16G16B16A16_SFLOAT;
-
-        VkImageCreateInfo cci{ VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
-        cci.flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
-        cci.imageType = VK_IMAGE_TYPE_2D; cci.format = cubeFmt; cci.extent = { FACE, FACE, 1 };
-        cci.mipLevels = 1; cci.arrayLayers = 6; cci.samples = VK_SAMPLE_COUNT_1_BIT;
-        cci.tiling = VK_IMAGE_TILING_OPTIMAL;
-        cci.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
-        VK_CHECK(vkCreateImage(device, &cci, nullptr, &cubeImage));
-        VkMemoryRequirements creq{}; vkGetImageMemoryRequirements(device, cubeImage, &creq);
-        VkMemoryAllocateInfo cai{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };
-        cai.allocationSize = creq.size; cai.memoryTypeIndex = FindMemoryType(creq.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
-        VK_CHECK(vkAllocateMemory(device, &cai, nullptr, &cubeMem));
-        VK_CHECK(vkBindImageMemory(device, cubeImage, cubeMem, 0));
-        VkImageViewCreateInfo cvci{ VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
-        cvci.image = cubeImage; cvci.viewType = VK_IMAGE_VIEW_TYPE_CUBE; cvci.format = cubeFmt;
-        cvci.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 6 };
-        VK_CHECK(vkCreateImageView(device, &cvci, nullptr, &cubeView));
-        VkSamplerCreateInfo csm{ VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO };
-        csm.magFilter = VK_FILTER_LINEAR; csm.minFilter = VK_FILTER_LINEAR;
-        csm.addressModeU = csm.addressModeV = csm.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
-        VK_CHECK(vkCreateSampler(device, &csm, nullptr, &cubeSampler));
-
-        int w = 0, h = 0, ch = 0;
-        float* pixels = stbi_loadf(path, &w, &h, &ch, 4);
-        if (!pixels)
-        {
-            DONUT_WARN("Vulkan: HDRI '{}' could not be loaded; using a dark background", path);
-            VkCommandBufferAllocateInfo cbai{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
-            cbai.commandPool = commandPool; cbai.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY; cbai.commandBufferCount = 1;
-            VkCommandBuffer cmd; VK_CHECK(vkAllocateCommandBuffers(device, &cbai, &cmd));
-            VkCommandBufferBeginInfo bi{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO }; bi.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
-            vkBeginCommandBuffer(cmd, &bi);
-            VkImageMemoryBarrier tb{ VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER };
-            tb.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED; tb.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
-            tb.image = cubeImage; tb.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 6 };
-            tb.srcAccessMask = 0; tb.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
-            vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, nullptr, 0, nullptr, 1, &tb);
-            VkClearColorValue dark{}; dark.float32[0] = 0.02f; dark.float32[1] = 0.02f; dark.float32[2] = 0.05f; dark.float32[3] = 1.0f;
-            VkImageSubresourceRange rng{ VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 6 };
-            vkCmdClearColorImage(cmd, cubeImage, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &dark, 1, &rng);
-            VkImageMemoryBarrier rb = tb; rb.oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL; rb.newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
-            rb.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT; rb.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
-            vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, 0, 0, nullptr, 0, nullptr, 1, &rb);
-            vkEndCommandBuffer(cmd);
-            VkSubmitInfo si{ VK_STRUCTURE_TYPE_SUBMIT_INFO }; si.commandBufferCount = 1; si.pCommandBuffers = &cmd;
-            vkQueueSubmit(graphicsQueue, 1, &si, VK_NULL_HANDLE); vkQueueWaitIdle(graphicsQueue);
-            vkFreeCommandBuffers(device, commandPool, 1, &cmd);
-            return true;
-        }
-
-        // Apple GPUs can't linearly filter RGBA32F, so store the equirect as
-        // RGBA16F (convert the loaded floats to half on the way into staging).
-        const VkFormat eqFmt = VK_FORMAT_R16G16B16A16_SFLOAT;
-        size_t texelCount = (size_t)w * h * 4;
-        VkDeviceSize eqSize = (VkDeviceSize)texelCount * sizeof(uint16_t);
-        VkBuffer eqStaging; VkDeviceMemory eqStagingMem;
-        if (!CreateBuffer(eqSize, VK_BUFFER_USAGE_TRANSFER_SRC_BIT, hostVis, eqStaging, eqStagingMem)) { stbi_image_free(pixels); return false; }
-        void* mp = nullptr; vkMapMemory(device, eqStagingMem, 0, eqSize, 0, &mp);
-        uint16_t* dst = (uint16_t*)mp;
-        for (size_t i = 0; i < texelCount; ++i) { __fp16 hf = (__fp16)pixels[i]; memcpy(&dst[i], &hf, sizeof(uint16_t)); }
-        vkUnmapMemory(device, eqStagingMem);
-        stbi_image_free(pixels);
-
-        VkImage eqImage; VkDeviceMemory eqMem;
-        VkImageCreateInfo eci{ VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };
-        eci.imageType = VK_IMAGE_TYPE_2D; eci.format = eqFmt; eci.extent = { (uint32_t)w, (uint32_t)h, 1 };
-        eci.mipLevels = 1; eci.arrayLayers = 1; eci.samples = VK_SAMPLE_COUNT_1_BIT;
-        eci.tiling = VK_IMAGE_TILING_OPTIMAL; eci.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
-        VK_CHECK(vkCreateImage(device, &eci, nullptr, &eqImage));
-        VkMemoryRequirements ereq{}; vkGetImageMemoryRequirements(device, eqImage, &ereq);
-        VkMemoryAllocateInfo eai{ VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO };
-        eai.allocationSize = ereq.size; eai.memoryTypeIndex = FindMemoryType(ereq.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
-        VK_CHECK(vkAllocateMemory(device, &eai, nullptr, &eqMem));
-        VK_CHECK(vkBindImageMemory(device, eqImage, eqMem, 0));
-        VkImageView eqView;
-        VkImageViewCreateInfo evci{ VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
-        evci.image = eqImage; evci.viewType = VK_IMAGE_VIEW_TYPE_2D; evci.format = eqFmt;
-        evci.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
-        VK_CHECK(vkCreateImageView(device, &evci, nullptr, &eqView));
-        VkSampler eqSampler;
-        VkSamplerCreateInfo esm{ VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO };
-        esm.magFilter = VK_FILTER_LINEAR; esm.minFilter = VK_FILTER_LINEAR;
-        esm.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;         // longitude wraps
-        esm.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;  // latitude clamps
-        esm.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
-        VK_CHECK(vkCreateSampler(device, &esm, nullptr, &eqSampler));
-
-        VkImageView faceViews[6];
-        for (uint32_t i = 0; i < 6; ++i)
-        {
-            VkImageViewCreateInfo fvci{ VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
-            fvci.image = cubeImage; fvci.viewType = VK_IMAGE_VIEW_TYPE_2D; fvci.format = cubeFmt;
-            fvci.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, i, 1 };
-            VK_CHECK(vkCreateImageView(device, &fvci, nullptr, &faceViews[i]));
-        }
-
-        VkAttachmentDescription color{};
-        color.format = cubeFmt; color.samples = VK_SAMPLE_COUNT_1_BIT;
-        color.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR; color.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
-        color.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE; color.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
-        color.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED; color.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
-        VkAttachmentReference ref{ 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
-        VkSubpassDescription subpass{}; subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS; subpass.colorAttachmentCount = 1; subpass.pColorAttachments = &ref;
-        VkSubpassDependency dep{}; dep.srcSubpass = 0; dep.dstSubpass = VK_SUBPASS_EXTERNAL;
-        dep.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; dep.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
-        dep.dstStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT; dep.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
-        VkRenderPass rp;
-        VkRenderPassCreateInfo rpci{ VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO };
-        rpci.attachmentCount = 1; rpci.pAttachments = &color; rpci.subpassCount = 1; rpci.pSubpasses = &subpass; rpci.dependencyCount = 1; rpci.pDependencies = &dep;
-        VK_CHECK(vkCreateRenderPass(device, &rpci, nullptr, &rp));
-        VkFramebuffer faceFB[6];
-        for (uint32_t i = 0; i < 6; ++i)
-        {
-            VkFramebufferCreateInfo fbci{ VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO };
-            fbci.renderPass = rp; fbci.attachmentCount = 1; fbci.pAttachments = &faceViews[i]; fbci.width = FACE; fbci.height = FACE; fbci.layers = 1;
-            VK_CHECK(vkCreateFramebuffer(device, &fbci, nullptr, &faceFB[i]));
-        }
-
-        VkDescriptorSetLayoutBinding binds[2]{};
-        binds[0].binding = 0; binds[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER; binds[0].descriptorCount = 1; binds[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
-        binds[1].binding = 1; binds[1].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; binds[1].descriptorCount = 1; binds[1].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
-        VkDescriptorSetLayout setLayout;
-        VkDescriptorSetLayoutCreateInfo dslci{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO }; dslci.bindingCount = 2; dslci.pBindings = binds;
-        VK_CHECK(vkCreateDescriptorSetLayout(device, &dslci, nullptr, &setLayout));
-        VkDescriptorPoolSize psizes[2] = { { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 6 }, { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 6 } };
-        VkDescriptorPool pool;
-        VkDescriptorPoolCreateInfo dpci{ VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO }; dpci.maxSets = 6; dpci.poolSizeCount = 2; dpci.pPoolSizes = psizes;
-        VK_CHECK(vkCreateDescriptorPool(device, &dpci, nullptr, &pool));
-
-        VkShaderModule vmod, fmod;
-        if (!CreateShaderModule("Assets/Shaders/generated/EquirectToCubemap.vertexMain.spv", vmod)) return false;
-        if (!CreateShaderModule("Assets/Shaders/generated/EquirectToCubemap.fragmentMain.spv", fmod)) return false;
-        VkPipelineLayout playout;
-        VkPipelineLayoutCreateInfo plci{ VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO }; plci.setLayoutCount = 1; plci.pSetLayouts = &setLayout;
-        VK_CHECK(vkCreatePipelineLayout(device, &plci, nullptr, &playout));
-        VkPipelineShaderStageCreateInfo stages[2]{};
-        stages[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[0].stage = VK_SHADER_STAGE_VERTEX_BIT;   stages[0].module = vmod; stages[0].pName = "main";
-        stages[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT; stages[1].module = fmod; stages[1].pName = "main";
-        VkVertexInputBindingDescription vib{ 0, 12, VK_VERTEX_INPUT_RATE_VERTEX };
-        VkVertexInputAttributeDescription via{ 0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0 };
-        VkPipelineVertexInputStateCreateInfo vin{ VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO };
-        vin.vertexBindingDescriptionCount = 1; vin.pVertexBindingDescriptions = &vib; vin.vertexAttributeDescriptionCount = 1; vin.pVertexAttributeDescriptions = &via;
-        VkPipelineInputAssemblyStateCreateInfo ia{ VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO }; ia.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
-        VkViewport vp{ 0, 0, (float)FACE, (float)FACE, 0, 1 }; VkRect2D sc{ { 0, 0 }, { FACE, FACE } };
-        VkPipelineViewportStateCreateInfo vps{ VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO }; vps.viewportCount = 1; vps.pViewports = &vp; vps.scissorCount = 1; vps.pScissors = &sc;
-        VkPipelineRasterizationStateCreateInfo rs{ VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO }; rs.polygonMode = VK_POLYGON_MODE_FILL; rs.cullMode = VK_CULL_MODE_NONE; rs.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE; rs.lineWidth = 1.0f;
-        VkPipelineMultisampleStateCreateInfo ms{ VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO }; ms.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
-        VkPipelineColorBlendAttachmentState cba{}; cba.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
-        VkPipelineColorBlendStateCreateInfo cb{ VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO }; cb.attachmentCount = 1; cb.pAttachments = &cba;
-        VkPipeline pipeline;
-        VkGraphicsPipelineCreateInfo gpci{ VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO };
-        gpci.stageCount = 2; gpci.pStages = stages; gpci.pVertexInputState = &vin; gpci.pInputAssemblyState = &ia; gpci.pViewportState = &vps;
-        gpci.pRasterizationState = &rs; gpci.pMultisampleState = &ms; gpci.pColorBlendState = &cb; gpci.layout = playout; gpci.renderPass = rp; gpci.subpass = 0;
-        VkResult pr = vkCreateGraphicsPipelines(device, VK_NULL_HANDLE, 1, &gpci, nullptr, &pipeline);
-        vkDestroyShaderModule(device, vmod, nullptr); vkDestroyShaderModule(device, fmod, nullptr);
-        if (pr != VK_SUCCESS) { DONUT_ERROR("Vulkan: equirect pipeline failed ({})", (int)pr); return false; }
-
-        float cubeVerts[] = {
-            -1,1,-1, -1,-1,-1, 1,-1,-1, 1,-1,-1, 1,1,-1, -1,1,-1,
-            -1,-1,1, -1,-1,-1, -1,1,-1, -1,1,-1, -1,1,1, -1,-1,1,
-             1,-1,-1, 1,-1,1, 1,1,1, 1,1,1, 1,1,-1, 1,-1,-1,
-            -1,-1,1, -1,1,1, 1,1,1, 1,1,1, 1,-1,1, -1,-1,1,
-            -1,1,-1, 1,1,-1, 1,1,1, 1,1,1, -1,1,1, -1,1,-1,
-            -1,-1,-1, -1,-1,1, 1,-1,-1, 1,-1,-1, -1,-1,1, 1,-1,1,
-        };
-        VkBuffer cubeVB; VkDeviceMemory cubeVBMem;
-        CreateBuffer(sizeof(cubeVerts), VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, hostVis, cubeVB, cubeVBMem);
-        vkMapMemory(device, cubeVBMem, 0, sizeof(cubeVerts), 0, &mp); memcpy(mp, cubeVerts, sizeof(cubeVerts)); vkUnmapMemory(device, cubeVBMem);
-
-        glm::mat4 proj = glm::perspective(glm::radians(90.0f), 1.0f, 0.1f, 10.0f);
-        proj[1][1] *= -1.0f;  // Vulkan clip space is Y-down vs OpenGL
-        glm::mat4 views[6] = {
-            glm::lookAt(glm::vec3(0), glm::vec3( 1, 0, 0), glm::vec3(0, -1, 0)),
-            glm::lookAt(glm::vec3(0), glm::vec3(-1, 0, 0), glm::vec3(0, -1, 0)),
-            glm::lookAt(glm::vec3(0), glm::vec3( 0, 1, 0), glm::vec3(0, 0, 1)),
-            glm::lookAt(glm::vec3(0), glm::vec3( 0, -1, 0), glm::vec3(0, 0, -1)),
-            glm::lookAt(glm::vec3(0), glm::vec3( 0, 0, 1), glm::vec3(0, -1, 0)),
-            glm::lookAt(glm::vec3(0), glm::vec3( 0, 0, -1), glm::vec3(0, -1, 0)),
-        };
-        VkBuffer ubo[6]; VkDeviceMemory uboMem[6]; VkDescriptorSet sets[6];
-        for (uint32_t i = 0; i < 6; ++i)
-        {
-            CreateBuffer(128, VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, hostVis, ubo[i], uboMem[i]);
-            glm::mat4 mats[2] = { glm::transpose(proj), glm::transpose(views[i]) };  // SPIR-V expects row-major
-            vkMapMemory(device, uboMem[i], 0, 128, 0, &mp); memcpy(mp, mats, 128); vkUnmapMemory(device, uboMem[i]);
-            VkDescriptorSetAllocateInfo dsai{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO }; dsai.descriptorPool = pool; dsai.descriptorSetCount = 1; dsai.pSetLayouts = &setLayout;
-            VK_CHECK(vkAllocateDescriptorSets(device, &dsai, &sets[i]));
-            VkDescriptorBufferInfo bufInfo{ ubo[i], 0, VK_WHOLE_SIZE };
-            VkDescriptorImageInfo imgInfo{ eqSampler, eqView, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
-            VkWriteDescriptorSet ws[2]{};
-            ws[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET; ws[0].dstSet = sets[i]; ws[0].dstBinding = 0; ws[0].descriptorCount = 1; ws[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER; ws[0].pBufferInfo = &bufInfo;
-            ws[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET; ws[1].dstSet = sets[i]; ws[1].dstBinding = 1; ws[1].descriptorCount = 1; ws[1].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; ws[1].pImageInfo = &imgInfo;
-            vkUpdateDescriptorSets(device, 2, ws, 0, nullptr);
-        }
-
-        VkCommandBufferAllocateInfo cbai{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
-        cbai.commandPool = commandPool; cbai.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY; cbai.commandBufferCount = 1;
-        VkCommandBuffer cmd; VK_CHECK(vkAllocateCommandBuffers(device, &cbai, &cmd));
-        VkCommandBufferBeginInfo bi{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO }; bi.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
-        VK_CHECK(vkBeginCommandBuffer(cmd, &bi));
-        VkImageMemoryBarrier toDst{ VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER };
-        toDst.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED; toDst.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
-        toDst.image = eqImage; toDst.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
-        toDst.srcAccessMask = 0; toDst.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
-        vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, nullptr, 0, nullptr, 1, &toDst);
-        VkBufferImageCopy copy{}; copy.imageSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 }; copy.imageExtent = { (uint32_t)w, (uint32_t)h, 1 };
-        vkCmdCopyBufferToImage(cmd, eqStaging, eqImage, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &copy);
-        VkImageMemoryBarrier toRead = toDst; toRead.oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL; toRead.newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
-        toRead.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT; toRead.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
-        vkCmdPipelineBarrier(cmd, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT, 0, 0, nullptr, 0, nullptr, 1, &toRead);
-
-        VkClearValue clear{}; clear.color = { { 0, 0, 0, 1 } };
-        for (uint32_t i = 0; i < 6; ++i)
-        {
-            VkRenderPassBeginInfo rpbi{ VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO };
-            rpbi.renderPass = rp; rpbi.framebuffer = faceFB[i]; rpbi.renderArea = { { 0, 0 }, { FACE, FACE } }; rpbi.clearValueCount = 1; rpbi.pClearValues = &clear;
-            vkCmdBeginRenderPass(cmd, &rpbi, VK_SUBPASS_CONTENTS_INLINE);
-            vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
-            vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, playout, 0, 1, &sets[i], 0, nullptr);
-            VkDeviceSize off = 0; vkCmdBindVertexBuffers(cmd, 0, 1, &cubeVB, &off);
-            vkCmdDraw(cmd, 36, 1, 0, 0);
-            vkCmdEndRenderPass(cmd);
-        }
-        VK_CHECK(vkEndCommandBuffer(cmd));
-        VkSubmitInfo si{ VK_STRUCTURE_TYPE_SUBMIT_INFO }; si.commandBufferCount = 1; si.pCommandBuffers = &cmd;
-        VK_CHECK(vkQueueSubmit(graphicsQueue, 1, &si, VK_NULL_HANDLE));
-        VK_CHECK(vkQueueWaitIdle(graphicsQueue));
-
-        vkFreeCommandBuffers(device, commandPool, 1, &cmd);
-        for (uint32_t i = 0; i < 6; ++i) { vkDestroyBuffer(device, ubo[i], nullptr); vkFreeMemory(device, uboMem[i], nullptr); vkDestroyFramebuffer(device, faceFB[i], nullptr); vkDestroyImageView(device, faceViews[i], nullptr); }
-        vkDestroyBuffer(device, cubeVB, nullptr); vkFreeMemory(device, cubeVBMem, nullptr);
-        vkDestroyPipeline(device, pipeline, nullptr); vkDestroyPipelineLayout(device, playout, nullptr);
-        vkDestroyDescriptorPool(device, pool, nullptr); vkDestroyDescriptorSetLayout(device, setLayout, nullptr);
-        vkDestroyRenderPass(device, rp, nullptr);
-        vkDestroySampler(device, eqSampler, nullptr); vkDestroyImageView(device, eqView, nullptr);
-        vkDestroyImage(device, eqImage, nullptr); vkFreeMemory(device, eqMem, nullptr);
-        vkDestroyBuffer(device, eqStaging, nullptr); vkFreeMemory(device, eqStagingMem, nullptr);
-        DONUT_INFO("Vulkan: HDRI cubemap built from {} ({}x{} equirect -> {}^2 cube)", path, w, h, (int)FACE);
-        return true;
-    }
-
-    bool VulkanRenderer::Impl::CreatePresentResources()
-    {
-        VkSamplerCreateInfo smci{ VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO };
-        smci.magFilter = VK_FILTER_LINEAR; smci.minFilter = VK_FILTER_LINEAR;
-        smci.addressModeU = smci.addressModeV = smci.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
-        VK_CHECK(vkCreateSampler(device, &smci, nullptr, &presentSampler));
-
-        VkDescriptorSetLayoutBinding bind{}; bind.binding = 0; bind.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; bind.descriptorCount = 1; bind.stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
-        VkDescriptorSetLayoutCreateInfo dslci{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO };
-        dslci.bindingCount = 1; dslci.pBindings = &bind;
-        VK_CHECK(vkCreateDescriptorSetLayout(device, &dslci, nullptr, &presentSetLayout));
-        VkDescriptorPoolSize psize{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1 };
-        VkDescriptorPoolCreateInfo dpci{ VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO };
-        dpci.maxSets = 1; dpci.poolSizeCount = 1; dpci.pPoolSizes = &psize;
-        VK_CHECK(vkCreateDescriptorPool(device, &dpci, nullptr, &presentPool));
-        VkDescriptorSetAllocateInfo dsai{ VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO };
-        dsai.descriptorPool = presentPool; dsai.descriptorSetCount = 1; dsai.pSetLayouts = &presentSetLayout;
-        VK_CHECK(vkAllocateDescriptorSets(device, &dsai, &presentSet));
-        VkDescriptorImageInfo ii{ presentSampler, geoImageView, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
-        VkWriteDescriptorSet write{ VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET };
-        write.dstSet = presentSet; write.dstBinding = 0; write.descriptorCount = 1; write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; write.pImageInfo = &ii;
-        vkUpdateDescriptorSets(device, 1, &write, 0, nullptr);
-
-        VkShaderModule vmod, fmod;
-        if (!CreateShaderModule("Assets/Shaders/generated/TexturedQuad.vertexMain.spv", vmod)) return false;
-        if (!CreateShaderModule("Assets/Shaders/generated/TexturedQuad.fragmentMain.spv", fmod)) return false;
-        VkPipelineLayoutCreateInfo plci{ VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO };
-        plci.setLayoutCount = 1; plci.pSetLayouts = &presentSetLayout;
-        VK_CHECK(vkCreatePipelineLayout(device, &plci, nullptr, &presentPipelineLayout));
-        VkPipelineShaderStageCreateInfo stages[2]{};
-        stages[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[0].stage = VK_SHADER_STAGE_VERTEX_BIT;   stages[0].module = vmod; stages[0].pName = "main";
-        stages[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO; stages[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT; stages[1].module = fmod; stages[1].pName = "main";
-        VkVertexInputBindingDescription vib{ 0, 16, VK_VERTEX_INPUT_RATE_VERTEX };
-        VkVertexInputAttributeDescription via[2] = { { 0, 0, VK_FORMAT_R32G32_SFLOAT, 0 }, { 1, 0, VK_FORMAT_R32G32_SFLOAT, 8 } };
-        VkPipelineVertexInputStateCreateInfo vin{ VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO };
-        vin.vertexBindingDescriptionCount = 1; vin.pVertexBindingDescriptions = &vib;
-        vin.vertexAttributeDescriptionCount = 2; vin.pVertexAttributeDescriptions = via;
-        VkPipelineInputAssemblyStateCreateInfo ia{ VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO }; ia.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
-        VkPipelineViewportStateCreateInfo vps{ VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO }; vps.viewportCount = 1; vps.scissorCount = 1;
-        VkDynamicState dyn[2] = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
-        VkPipelineDynamicStateCreateInfo dsci{ VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO }; dsci.dynamicStateCount = 2; dsci.pDynamicStates = dyn;
-        VkPipelineRasterizationStateCreateInfo rs{ VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO }; rs.polygonMode = VK_POLYGON_MODE_FILL; rs.cullMode = VK_CULL_MODE_NONE; rs.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE; rs.lineWidth = 1.0f;
-        VkPipelineMultisampleStateCreateInfo ms{ VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO }; ms.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
-        VkPipelineColorBlendAttachmentState cba{}; cba.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
-        VkPipelineColorBlendStateCreateInfo cb{ VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO }; cb.attachmentCount = 1; cb.pAttachments = &cba;
-        VkGraphicsPipelineCreateInfo gpci{ VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO };
-        gpci.stageCount = 2; gpci.pStages = stages;
-        gpci.pVertexInputState = &vin; gpci.pInputAssemblyState = &ia; gpci.pViewportState = &vps;
-        gpci.pDynamicState = &dsci;
-        gpci.pRasterizationState = &rs; gpci.pMultisampleState = &ms; gpci.pColorBlendState = &cb;
-        gpci.layout = presentPipelineLayout; gpci.renderPass = renderPass; gpci.subpass = 0;
-        VkResult pr = vkCreateGraphicsPipelines(device, VK_NULL_HANDLE, 1, &gpci, nullptr, &presentPipeline);
-        vkDestroyShaderModule(device, vmod, nullptr); vkDestroyShaderModule(device, fmod, nullptr);
-        if (pr != VK_SUCCESS) { DONUT_ERROR("Vulkan: present pipeline creation failed ({})", (int)pr); return false; }
-        DONUT_INFO("Vulkan: present pipeline ready");
-        return true;
-    }
-
-    void VulkanRenderer::Impl::UpdateGeodesicUniforms()
-    {
-        struct CamUBO {
-            glm::vec3 pos; float p0; glm::vec3 right; float p1;
-            glm::vec3 up; float p2; glm::vec3 fwd; float p3;
-            float tanHalfFov; float aspect; uint32_t moving; int p4;
-        } camData{};
-        glm::vec3 pos   = camera.GetOrbitalPosition();
-        glm::vec3 fwd   = glm::normalize(camera.GetOrbitalTarget() - pos);
-        glm::vec3 right = glm::normalize(glm::cross(fwd, glm::vec3(0, 1, 0)));
-        camData.pos = pos; camData.right = right; camData.up = glm::cross(right, fwd); camData.fwd = fwd;
-        camData.tanHalfFov = (float)tan(glm::radians(60.0f * 0.5f));
-        camData.aspect = (float)GEO_W / (float)GEO_H;
-        camData.moving = camera.IsDragging() || camera.IsPanning() ? 1u : 0u;
-        if (camMapped) memcpy(camMapped, &camData, sizeof(camData));
-
-        // Fewer integration steps while the camera moves keeps dragging responsive;
-        // more steps once it settles renders the disk in full.
-        struct SimUBO { int stepsMoving; int stepsStatic; float earlyExit; float time; } sim;
-        sim.stepsMoving = 3500; sim.stepsStatic = 5000; sim.earlyExit = 5e12f;
-        sim.time = (float)(glfwGetTime() - startTime);
-        if (simMapped) memcpy(simMapped, &sim, sizeof(sim));
-    }
-
-    static double g_ScrollAccum = 0.0;
-    static GLFWscrollfun g_PrevScroll = nullptr;
-    static void DonutVkScrollCallback(GLFWwindow* w, double x, double y)
-    {
-        if (g_PrevScroll) g_PrevScroll(w, x, y);  // keep ImGui's scroll handling intact
-        g_ScrollAccum += y;
-    }
-
-    void VulkanRenderer::Impl::ProcessInput()
-    {
-        bool overUI = imguiInit && ImGui::GetIO().WantCaptureMouse;
-
-        bool leftDown = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS;
-        if (leftDown && !leftWasDown && !overUI)
-            camera.ProcessOrbitalMouseButton(GLFW_MOUSE_BUTTON_LEFT, GLFW_PRESS, 0);
-        else if (!leftDown && leftWasDown)
-            camera.ProcessOrbitalMouseButton(GLFW_MOUSE_BUTTON_LEFT, GLFW_RELEASE, 0);
-        leftWasDown = leftDown;
-
-        double mx = 0, my = 0;
-        glfwGetCursorPos(window, &mx, &my);
-        camera.ProcessOrbitalMouseMove(mx, my);  // tracks last position internally; orbits only while dragging
-
-        double scroll = g_ScrollAccum; g_ScrollAccum = 0.0;
-        if (scroll != 0.0 && !overUI)
-            camera.ProcessOrbitalScroll(0.0, scroll);
-    }
-
-    void VulkanRenderer::Impl::DestroyGeodesicResources()
-    {
-        if (presentPipeline) vkDestroyPipeline(device, presentPipeline, nullptr);
-        if (presentPipelineLayout) vkDestroyPipelineLayout(device, presentPipelineLayout, nullptr);
-        if (presentPool) vkDestroyDescriptorPool(device, presentPool, nullptr);
-        if (presentSetLayout) vkDestroyDescriptorSetLayout(device, presentSetLayout, nullptr);
-        if (presentSampler) vkDestroySampler(device, presentSampler, nullptr);
-
-        if (geoPipeline) vkDestroyPipeline(device, geoPipeline, nullptr);
-        if (geoPipelineLayout) vkDestroyPipelineLayout(device, geoPipelineLayout, nullptr);
-        if (geoPool) vkDestroyDescriptorPool(device, geoPool, nullptr);
-        if (geoSetLayout) vkDestroyDescriptorSetLayout(device, geoSetLayout, nullptr);
-        if (quadVB) vkDestroyBuffer(device, quadVB, nullptr);
-        if (quadVBMem) vkFreeMemory(device, quadVBMem, nullptr);
-        if (cubeSampler) vkDestroySampler(device, cubeSampler, nullptr);
-        if (cubeView) vkDestroyImageView(device, cubeView, nullptr);
-        if (cubeImage) vkDestroyImage(device, cubeImage, nullptr);
-        if (cubeMem) vkFreeMemory(device, cubeMem, nullptr);
-        if (camMapped) { vkUnmapMemory(device, camMem); camMapped = nullptr; }
-        if (simMapped) { vkUnmapMemory(device, simMem); simMapped = nullptr; }
-        VkBuffer ubos[4] = { camBuf, diskBuf, objBuf, simBuf };
-        VkDeviceMemory umem[4] = { camMem, diskMem, objMem, simMem };
-        for (int i = 0; i < 4; ++i) { if (ubos[i]) vkDestroyBuffer(device, ubos[i], nullptr); if (umem[i]) vkFreeMemory(device, umem[i], nullptr); }
-        if (geoFramebuffer) vkDestroyFramebuffer(device, geoFramebuffer, nullptr);
-        if (geoRenderPass) vkDestroyRenderPass(device, geoRenderPass, nullptr);
-        if (geoImageView) vkDestroyImageView(device, geoImageView, nullptr);
-        if (geoImage) vkDestroyImage(device, geoImage, nullptr);
-        if (geoImageMem) vkFreeMemory(device, geoImageMem, nullptr);
-    }
-
-    bool VulkanRenderer::Impl::RecordCommandBuffer(VkCommandBuffer cmd, uint32_t imageIndex, const glm::vec4& clear, ImDrawData* drawData)
-    {
-        VkCommandBufferBeginInfo begin{ VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO };
-        VK_CHECK(vkBeginCommandBuffer(cmd, &begin));
-
-        // Geodesic offscreen pass
-        VkClearValue geoClear{}; geoClear.color = { { 0, 0, 0, 1 } };
-        VkRenderPassBeginInfo grp{ VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO };
-        grp.renderPass = geoRenderPass; grp.framebuffer = geoFramebuffer;
-        grp.renderArea = { { 0, 0 }, { GEO_W, GEO_H } };
-        grp.clearValueCount = 1; grp.pClearValues = &geoClear;
-        vkCmdBeginRenderPass(cmd, &grp, VK_SUBPASS_CONTENTS_INLINE);
-        vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, geoPipeline);
-        vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, geoPipelineLayout, 0, 1, &geoSet, 0, nullptr);
-        VkDeviceSize off = 0; vkCmdBindVertexBuffers(cmd, 0, 1, &quadVB, &off);
-        vkCmdDraw(cmd, 6, 1, 0, 0);
-        vkCmdEndRenderPass(cmd);
-
-        // Swapchain pass: upscale the geodesic image, then the ImGui UI on top
-        VkClearValue cv{}; cv.color = { { clear.r, clear.g, clear.b, clear.a } };
-        VkRenderPassBeginInfo rpbi{ VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO };
-        rpbi.renderPass = renderPass;
-        rpbi.framebuffer = framebuffers[imageIndex];
-        rpbi.renderArea = { { 0, 0 }, swapchainExtent };
-        rpbi.clearValueCount = 1; rpbi.pClearValues = &cv;
-        vkCmdBeginRenderPass(cmd, &rpbi, VK_SUBPASS_CONTENTS_INLINE);
-        vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, presentPipeline);
-        // Negative-height viewport flips the geodesic image vertically so the scene
-        // reads the same as the OpenGL path (Vulkan's clip space is Y-down). Only
-        // this draw is affected; ImGui sets its own viewport.
-        VkViewport vp{ 0, (float)swapchainExtent.height, (float)swapchainExtent.width, -(float)swapchainExtent.height, 0, 1 };
-        VkRect2D scissor{ { 0, 0 }, swapchainExtent };
-        vkCmdSetViewport(cmd, 0, 1, &vp);
-        vkCmdSetScissor(cmd, 0, 1, &scissor);
-        vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, presentPipelineLayout, 0, 1, &presentSet, 0, nullptr);
-        vkCmdBindVertexBuffers(cmd, 0, 1, &quadVB, &off);
-        vkCmdDraw(cmd, 6, 1, 0, 0);
-        if (drawData)
-            ImGui_ImplVulkan_RenderDrawData(drawData, cmd);
-        vkCmdEndRenderPass(cmd);
-
-        VK_CHECK(vkEndCommandBuffer(cmd));
-        return true;
-    }
-
-    void VulkanRenderer::Impl::CleanupSwapchain()
-    {
-        for (auto fb : framebuffers) vkDestroyFramebuffer(device, fb, nullptr);
-        framebuffers.clear();
-        for (auto iv : imageViews) vkDestroyImageView(device, iv, nullptr);
-        imageViews.clear();
-        if (renderPass) { vkDestroyRenderPass(device, renderPass, nullptr); renderPass = VK_NULL_HANDLE; }
-        if (swapchain)  { vkDestroySwapchainKHR(device, swapchain, nullptr); swapchain = VK_NULL_HANDLE; }
-    }
-
-    bool VulkanRenderer::Impl::RecreateSwapchain()
-    {
-        // Wait until the window has a non-zero size (e.g. after un-minimizing).
-        int w = 0, h = 0;
-        glfwGetFramebufferSize(window, &w, &h);
-        while (w == 0 || h == 0)
-        {
-            glfwGetFramebufferSize(window, &w, &h);
-            glfwWaitEvents();
-        }
-        width = w; height = h;
-        vkDeviceWaitIdle(device);
-
-        CleanupSwapchain();
-        // renderFinished are tied to image count; recreate below via sync if it changed.
-        if (!CreateSwapchain())   return false;
-        if (!CreateImageViews())  return false;
-        if (!CreateRenderPass())  return false;
-        if (!CreateFramebuffers())return false;
-        imagesInFlight.assign(images.size(), VK_NULL_HANDLE);
-        return true;
-    }
-
-    VulkanRenderer::VulkanRenderer()  { m_Impl = new Impl(); }
-    VulkanRenderer::~VulkanRenderer() { Shutdown(); delete m_Impl; m_Impl = nullptr; }
-
-    bool VulkanRenderer::Init(void* glfwWindow, int width, int height)
-    {
-        Impl& v = *m_Impl;
-        v.window = (GLFWwindow*)glfwWindow;
-        v.width = width; v.height = height;
-
-        if (!v.CreateInstance())        return false;
-        if (!v.PickPhysicalAndDevice()) return false;
-        if (!v.CreateSwapchain())       return false;
-        if (!v.CreateImageViews())      return false;
-        if (!v.CreateRenderPass())      return false;
-        if (!v.CreateFramebuffers())    return false;
-        if (!v.CreateCommandBuffers())  return false;
-        if (!v.CreateSyncObjects())     return false;
-        if (!v.CreateGeodesicResources()) return false;
-        if (!v.CreatePresentResources())  return false;
-
-        DONUT_INFO("Vulkan renderer ready: {} swapchain images, {}x{}",
-                   (int)v.images.size(), v.swapchainExtent.width, v.swapchainExtent.height);
-        return true;
-    }
-
-    bool VulkanRenderer::InitImGui()
-    {
-        Impl& v = *m_Impl;
-        if (v.device == VK_NULL_HANDLE) return false;
-
-        VkDescriptorPoolSize poolSize{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 };
-        VkDescriptorPoolCreateInfo dpci{ VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO };
-        dpci.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
-        dpci.maxSets = 1000;
-        dpci.poolSizeCount = 1; dpci.pPoolSizes = &poolSize;
-        VK_CHECK(vkCreateDescriptorPool(v.device, &dpci, nullptr, &v.imguiPool));
-
-        IMGUI_CHECKVERSION();
-        ImGui::CreateContext();
-        ImGuiIO& io = ImGui::GetIO();
-        io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
-        io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
-        ImGui::StyleColorsDark();
-
-        ImGui_ImplGlfw_InitForVulkan(v.window, true);
-        g_PrevScroll = glfwSetScrollCallback(v.window, DonutVkScrollCallback);  // chain ImGui + camera zoom
-        ImGui_ImplVulkan_InitInfo info{};
-        info.ApiVersion     = VK_API_VERSION_1_2;
-        info.Instance       = v.instance;
-        info.PhysicalDevice = v.physical;
-        info.Device         = v.device;
-        info.QueueFamily    = v.graphicsFamily;
-        info.Queue          = v.graphicsQueue;
-        info.DescriptorPool = v.imguiPool;
-        info.RenderPass     = v.renderPass;
-        info.MinImageCount  = 2;
-        info.ImageCount     = (uint32_t)v.images.size();
-        info.MSAASamples    = VK_SAMPLE_COUNT_1_BIT;
-        if (!ImGui_ImplVulkan_Init(&info))
-        {
-            DONUT_ERROR("Vulkan: ImGui_ImplVulkan_Init failed");
-            return false;
-        }
-
-        v.imguiInit = true;
-        DONUT_INFO("Vulkan: ImGui backend initialized");
-        return true;
-    }
-
-    void VulkanRenderer::OnResize(int width, int height)
-    {
-        m_Impl->framebufferResized = true;
-        m_Impl->width = width; m_Impl->height = height;
-    }
-
-    void VulkanRenderer::DrawFrame(const glm::vec4& clearColor, const std::function<void()>& buildUI)
-    {
-        Impl& v = *m_Impl;
-        if (v.device == VK_NULL_HANDLE) return;
-
-        ImDrawData* drawData = nullptr;
-        if (v.imguiInit)
-        {
-            ImGui_ImplVulkan_NewFrame();
-            ImGui_ImplGlfw_NewFrame();
-            ImGui::NewFrame();
-            if (buildUI) buildUI();
-            ImGui::Render();
-            drawData = ImGui::GetDrawData();
-        }
-
-        vkWaitForFences(v.device, 1, &v.inFlight[v.currentFrame], VK_TRUE, UINT64_MAX);
-
-        uint32_t imageIndex = 0;
-        VkResult r = vkAcquireNextImageKHR(v.device, v.swapchain, UINT64_MAX,
-                                           v.imageAvailable[v.currentFrame], VK_NULL_HANDLE, &imageIndex);
-        if (r == VK_ERROR_OUT_OF_DATE_KHR) { v.RecreateSwapchain(); return; }
-        if (r != VK_SUCCESS && r != VK_SUBOPTIMAL_KHR) { DONUT_ERROR("Vulkan: acquire failed ({})", (int)r); return; }
-
-        if (v.imagesInFlight[imageIndex] != VK_NULL_HANDLE)
-            vkWaitForFences(v.device, 1, &v.imagesInFlight[imageIndex], VK_TRUE, UINT64_MAX);
-        v.imagesInFlight[imageIndex] = v.inFlight[v.currentFrame];
-
-        // The geodesic offscreen image is shared across frames in flight; wait for
-        // the previous frame to finish reading it before overwriting it this frame.
-        if (v.geoInUse != VK_NULL_HANDLE)
-            vkWaitForFences(v.device, 1, &v.geoInUse, VK_TRUE, UINT64_MAX);
-        v.ProcessInput();
-        v.UpdateGeodesicUniforms();
-
-        vkResetCommandBuffer(v.commandBuffers[v.currentFrame], 0);
-        if (!v.RecordCommandBuffer(v.commandBuffers[v.currentFrame], imageIndex, clearColor, drawData)) return;
-
-        VkPipelineStageFlags waitStage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
-        VkSubmitInfo submit{ VK_STRUCTURE_TYPE_SUBMIT_INFO };
-        submit.waitSemaphoreCount   = 1;
-        submit.pWaitSemaphores      = &v.imageAvailable[v.currentFrame];
-        submit.pWaitDstStageMask    = &waitStage;
-        submit.commandBufferCount   = 1;
-        submit.pCommandBuffers      = &v.commandBuffers[v.currentFrame];
-        submit.signalSemaphoreCount = 1;
-        submit.pSignalSemaphores    = &v.renderFinished[imageIndex];
-
-        vkResetFences(v.device, 1, &v.inFlight[v.currentFrame]);
-        if (vkQueueSubmit(v.graphicsQueue, 1, &submit, v.inFlight[v.currentFrame]) != VK_SUCCESS)
-        { DONUT_ERROR("Vulkan: queue submit failed"); return; }
-        v.geoInUse = v.inFlight[v.currentFrame];
-
-        VkPresentInfoKHR present{ VK_STRUCTURE_TYPE_PRESENT_INFO_KHR };
-        present.waitSemaphoreCount = 1;
-        present.pWaitSemaphores    = &v.renderFinished[imageIndex];
-        present.swapchainCount     = 1;
-        present.pSwapchains        = &v.swapchain;
-        present.pImageIndices      = &imageIndex;
-        r = vkQueuePresentKHR(v.presentQueue, &present);
-        if (r == VK_ERROR_OUT_OF_DATE_KHR || r == VK_SUBOPTIMAL_KHR || v.framebufferResized)
-        {
-            v.framebufferResized = false;
-            v.RecreateSwapchain();
-        }
-
-        v.currentFrame = (v.currentFrame + 1) % MAX_FRAMES_IN_FLIGHT;
-    }
-
-    void VulkanRenderer::Shutdown()
-    {
-        Impl& v = *m_Impl;
-        if (v.device == VK_NULL_HANDLE) { if (v.instance && v.surface) { vkDestroySurfaceKHR(v.instance, v.surface, nullptr); v.surface = VK_NULL_HANDLE; } if (v.instance) { vkDestroyInstance(v.instance, nullptr); v.instance = VK_NULL_HANDLE; } return; }
-
-        vkDeviceWaitIdle(v.device);
-        v.DestroyGeodesicResources();
-        if (v.imguiInit)
-        {
-            ImGui_ImplVulkan_Shutdown();
-            ImGui_ImplGlfw_Shutdown();
-            ImGui::DestroyContext();
-            v.imguiInit = false;
-        }
-        if (v.imguiPool) { vkDestroyDescriptorPool(v.device, v.imguiPool, nullptr); v.imguiPool = VK_NULL_HANDLE; }
-        for (auto s : v.renderFinished) vkDestroySemaphore(v.device, s, nullptr);
-        for (auto s : v.imageAvailable) vkDestroySemaphore(v.device, s, nullptr);
-        for (auto f : v.inFlight)       vkDestroyFence(v.device, f, nullptr);
-        v.renderFinished.clear(); v.imageAvailable.clear(); v.inFlight.clear();
-        if (v.commandPool) { vkDestroyCommandPool(v.device, v.commandPool, nullptr); v.commandPool = VK_NULL_HANDLE; }
-        v.CleanupSwapchain();
-        vkDestroyDevice(v.device, nullptr); v.device = VK_NULL_HANDLE;
-        if (v.surface)  { vkDestroySurfaceKHR(v.instance, v.surface, nullptr); v.surface = VK_NULL_HANDLE; }
-        if (v.instance) { vkDestroyInstance(v.instance, nullptr); v.instance = VK_NULL_HANDLE; }
-    }
-}