c++ - 为什么 vkCreateSwapchainKHR 会在 0 处导致访问冲突？

Question

我正在尝试通过遵循 vulkan-tutorial.com 上的精彩教程来学习 Vulkan，但我在必须创建交换链时遇到了一些麻烦。如标题中所述，vkCreateSwapchainKHR 会产生以下错误:Access violation executing location 0x0000000000000000。

教程表明这可能与 Steam 界面冲突。这对我来说并非如此，因为我从教程作品中复制了整个代码。

我正在尝试弄清楚我的代码出了什么问题，并学习如何调试此类问题，因为我以后将没有引用代码。有罪的线看起来是这样的:

if (vkCreateSwapchainKHR(device, &swapChainCreateInfo, nullptr, &swapChain) != VK_SUCCESS) {
    throw std::runtime_error("Could not create swap chain");
}

我在此行设置了一个断点，以将我的代码中的参数值与引用代码中的值进行比较。据我所知，没有区别。 (地址当然不同)

我应该在哪里查找代码中的问题？变量 swapChain 是预期的 NULL。格式错误的 swapChainCreateInfo 不应导致 vkCreateSwapchainKHR 崩溃。它只会让它返回一些不是 VK_SUCCESS 的东西。并且设备创建没有问题:

if (vkCreateDevice(physicalDevice, &createInfo, nullptr, &device) != VK_SUCCESS) {
    throw std::runtime_error("Failed to create logical device");
}

编辑 - 我正在使用验证层 VK_LAYER_LUNARG_standard_validation 并且我的 createInfo 设置如下。

// Useful functions and structures
VkPhysicalDevice physicalDevice;
VkSurfaceKHR surface;
VkSwapchainKHR swapChain;

struct QueueFamilyIndices {
    std::optional<uint32_t> graphicsFamily;
    std::optional<uint32_t> presentationFamily;
    bool isComplete() {
        return graphicsFamily.has_value() && presentationFamily.has_value();
    }
};

struct SwapChainSupportDetails {
    VkSurfaceCapabilitiesKHR surfaceCapabilities;
    std::vector<VkSurfaceFormatKHR> formats;
    std::vector<VkPresentModeKHR> presentModes;
};

SwapChainSupportDetails querySwapChainSupport(VkPhysicalDevice physicalDevice) {
    SwapChainSupportDetails swapChainSupportDetails;

    vkGetPhysicalDeviceSurfaceCapabilitiesKHR(physicalDevice, surface, &swapChainSupportDetails.surfaceCapabilities);

    uint32_t formatCount = 0;
    vkGetPhysicalDeviceSurfaceFormatsKHR(physicalDevice, surface, &formatCount, nullptr);
    if (formatCount != 0) {
        swapChainSupportDetails.formats.resize(formatCount);
        vkGetPhysicalDeviceSurfaceFormatsKHR(physicalDevice, surface, &formatCount, swapChainSupportDetails.formats.data());
    }

    uint32_t presentModeCount = 0;
    vkGetPhysicalDeviceSurfacePresentModesKHR(physicalDevice, surface, &presentModeCount, nullptr);
    if (presentModeCount != 0) {
        swapChainSupportDetails.presentModes.resize(presentModeCount);
        vkGetPhysicalDeviceSurfacePresentModesKHR(physicalDevice, surface, &presentModeCount, swapChainSupportDetails.presentModes.data());
    }

    return swapChainSupportDetails;
}

VkSurfaceFormatKHR chooseSwapChainSurfaceFormat(const std::vector<VkSurfaceFormatKHR> & availableFormats) {
    if (availableFormats.size() == 1 && availableFormats[0].format == VK_FORMAT_UNDEFINED) {
        return { VK_FORMAT_B8G8R8A8_UNORM, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR };
    }

    for (const auto & availableFormat : availableFormats) {
        if (availableFormat.format == VK_FORMAT_B8G8R8A8_UNORM && availableFormat.colorSpace == VK_COLOR_SPACE_SRGB_NONLINEAR_KHR) {
            return availableFormat;
        }
    }

    return availableFormats[0];
}

VkPresentModeKHR chooseSwapChainPresentMode(const std::vector<VkPresentModeKHR> & availablePresentModes) {

    VkPresentModeKHR bestMode = VK_PRESENT_MODE_FIFO_KHR;
    for (const auto & availablePresentMode : availablePresentModes) {
        if (availablePresentMode == VK_PRESENT_MODE_MAILBOX_KHR) {
            return availablePresentMode;
        }
        else if (availablePresentMode == VK_PRESENT_MODE_IMMEDIATE_KHR) {
            bestMode = availablePresentMode;
        }
    }

    return bestMode;
}

VkExtent2D chooseSwapChainExtent2D(const VkSurfaceCapabilitiesKHR & surfaceCapabilities) {
    if (surfaceCapabilities.currentExtent.width != std::numeric_limits<uint32_t>::max()) {
        return surfaceCapabilities.currentExtent;
    }
    else {
        VkExtent2D actualExtent = { WIDTH, HEIGHT };
        actualExtent.width = std::max(std::min(surfaceCapabilities.maxImageExtent.width, actualExtent.width), surfaceCapabilities.minImageExtent.width);
        actualExtent.height = std::max(std::min(surfaceCapabilities.maxImageExtent.height, actualExtent.height), surfaceCapabilities.minImageExtent.height);
        return actualExtent;
    }
}

// Swap Chain creation code

SwapChainSupportDetails swapChainSupportDetails = querySwapChainSupport(physicalDevice);

VkSurfaceFormatKHR surfaceFormat = chooseSwapChainSurfaceFormat(swapChainSupportDetails.formats);
VkPresentModeKHR presentMode = chooseSwapChainPresentMode(swapChainSupportDetails.presentModes);
VkExtent2D extent = chooseSwapChainExtent2D(swapChainSupportDetails.surfaceCapabilities);
uint32_t imageCount = swapChainSupportDetails.surfaceCapabilities.minImageCount + 1;
if (swapChainSupportDetails.surfaceCapabilities.maxImageCount > 0 && imageCount > swapChainSupportDetails.surfaceCapabilities.maxImageCount) {
    imageCount = swapChainSupportDetails.surfaceCapabilities.minImageCount;
}

VkSwapchainCreateInfoKHR swapChainCreateInfo = {};
swapChainCreateInfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
swapChainCreateInfo.surface = surface;
swapChainCreateInfo.minImageCount = imageCount;
swapChainCreateInfo.imageFormat = surfaceFormat.format;
swapChainCreateInfo.imageColorSpace = surfaceFormat.colorSpace;
swapChainCreateInfo.imageExtent = extent;
swapChainCreateInfo.imageArrayLayers = 1;
swapChainCreateInfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;

QueueFamilyIndices familyIndices = findQueueFamilies(physicalDevice);
uint32_t queueFamilyIndices[] = { familyIndices.graphicsFamily.value(), familyIndices.presentationFamily.value() };
if (familyIndices.graphicsFamily != familyIndices.presentationFamily) {
    swapChainCreateInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
    swapChainCreateInfo.queueFamilyIndexCount = 2;
    swapChainCreateInfo.pQueueFamilyIndices = queueFamilyIndices;
}
else {
    swapChainCreateInfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
    swapChainCreateInfo.queueFamilyIndexCount = 0;
    swapChainCreateInfo.pQueueFamilyIndices = nullptr;
}

swapChainCreateInfo.preTransform = swapChainSupportDetails.surfaceCapabilities.currentTransform;
swapChainCreateInfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
swapChainCreateInfo.presentMode = presentMode;
swapChainCreateInfo.clipped = VK_TRUE;
swapChainCreateInfo.oldSwapchain = VK_NULL_HANDLE;

if (vkCreateSwapchainKHR(device, &swapChainCreateInfo, nullptr, &swapChain) != VK_SUCCESS) {
    throw std::runtime_error("Could not create swap chain");
}

我得到了结果结构:

Answer 1

那么，在创建逻辑设备时，需要将 enabledExtensionCount 设置为所需扩展的实际数量，而不是 0(如果希望扩展有效)。就我而言，这是一个简单的编辑失败。这是我的代码中的 gem:

createInfo.enabledExtensionCount = static_cast<uint32_t>(deviceExtensions.size());
createInfo.ppEnabledExtensionNames = deviceExtensions.data();

createInfo.enabledExtensionCount = 0;

我通过将我的代码中的每个函数替换为引用代码中的函数直到它起作用来解决这个问题。我对验证层没有捕捉到这一点感到有点失望。我设置错了吗？这是他们应该捕获的东西吗？

编辑:正如 LIANG LIU 所指出的，这里是 deviceExtensions 的初始化:

const std::vector<const char*> deviceExtensions = {
    VK_KHR_SWAPCHAIN_EXTENSION_NAME
};