Vulkan complains about invalid VkFramebuffer handle

Question

I'm currently working on my Vulkan renderer and I'm trying to implement ImGUI. I use 2 separate render passes. One for the "main" rendering of my scene and one for DearImGUI. But here comes the problem. When I began the IMGUI renderpass I keep getting the following error:

validation layervkCmdBeginRenderPass(): pCreateInfo->pAttachments[0] VkImageView 0xead9370000000008 is invalid.
The Vulkan spec states: framebuffer must be a valid VkFramebuffer handle

My Renderpass code & framebuffer creation:

//Create Render Pass
VkAttachmentDescription attachment = {};
attachment.format = m_Context->m_SwapChainImageFormat;
attachment.samples = VK_SAMPLE_COUNT_1_BIT;
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_LOAD;
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attachment.initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
attachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;

VkAttachmentReference color_attachment = {};
color_attachment.attachment = 0;
color_attachment.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

VkSubpassDescription subpass = {};
subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass.colorAttachmentCount = 1;
subpass.pColorAttachments = &color_attachment;

VkSubpassDependency dependency = {};
dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
dependency.dstSubpass = 0;
dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.srcAccessMask = 0;  // or VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;

VkRenderPassCreateInfo info = {};
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
info.attachmentCount = 1;
info.pAttachments = &attachment;
info.subpassCount = 1;
info.pSubpasses = &subpass;
info.dependencyCount = 1;
info.pDependencies = &dependency;
if (vkCreateRenderPass(m_Context->m_LogicalDevice, &info, nullptr, &m_RenderPass) != VK_SUCCESS) {
    throw std::runtime_error("Could not create Dear ImGui's render pass");
}

{
    VkImageView attachmentImageView[1];
    VkFramebufferCreateInfo info = {};
    info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
    info.renderPass = m_RenderPass;
    info.attachmentCount = 1;
    info.pAttachments = attachmentImageView;
    info.width = m_Context->m_SwapChainExtent.width;
    info.height = m_Context->m_SwapChainExtent.height;
    info.layers = 1;
    m_FrameBuffers.resize(m_Context->m_SwapChainImageViews.size());
    for (uint32_t i = 0; i < m_Context->m_SwapChainImageViews.size(); i++)
    {
        std::cout << i << std::endl;
        std::cout << m_Context->m_SwapChainImageViews[i] << std::endl;

        attachmentImageView[0] = m_Context->m_SwapChainImageViews[i];
        vkCreateFramebuffer(m_Context->m_LogicalDevice, &info, nullptr, &m_FrameBuffers[i]);
    }
}

Here is the code for creating the image views:

VkImageView Image::createImageView(VulkanContext& context, VkImage &image, VkFormat format, VkImageAspectFlags aspectFlags, uint32_t mipLevels)
{
    VkImageViewCreateInfo viewInfo{};
    viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
    viewInfo.image = image;
    viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
    viewInfo.format = format;
    viewInfo.subresourceRange.aspectMask = aspectFlags;
    viewInfo.subresourceRange.baseMipLevel = 0;
    viewInfo.subresourceRange.levelCount = mipLevels;
    viewInfo.subresourceRange.baseArrayLayer = 0;
    viewInfo.subresourceRange.layerCount = 1;
    VkImageView imageView;
    if (vkCreateImageView(context.m_LogicalDevice, &viewInfo, nullptr, &imageView) != VK_SUCCESS) {
        throw std::runtime_error("failed to create image view!");
    }
    return imageView;
}

void Swapchain::createImageViews(VulkanContext &context)
{
    m_Context.m_SwapChainImageViews.resize(m_Context.m_SwapChainImages.size());

    for (size_t i = 0; i < m_Context.m_SwapChainImages.size(); i++) {
        m_Context.m_SwapChainImageViews[i] = Image::createImageView(context,context.m_SwapChainImages[i], m_Context.m_SwapChainImageFormat, VK_IMAGE_ASPECT_COLOR_BIT, 1);
    }
}

Also I want to mention that I've checked that nothing is VK_NULL_HANDLE.

stackaccount · Accepted Answer · 2025-06-19 21:07:32Z

You're creating an array of type VkImageView with a size of one right above your VkFramebufferCreateInfo struct with VkImageView attachmentImageView[1];

info.pAttachments expects you to provide an already created image view.

You have to create your VkImageViews first, then pass it to VkFramebufferCreateInfo. It's also a good idea to have as many VkImageViews as frames in flight.

For one image view:

VkImageView imageView;
...
vkCreateImageView(device, &ivInfo, nullptr, &imageView);
...
info.pAttachments = &imageView;

For an array or vector of VkFramebuffer and VkImageView:

std::vector<VkImageView> imageViews;
for (int i = 0; i < framesInFlight; ++i) {
    ...
    vkCreateImageView(device, &ivInfo, nullptr, &imageViews[i]);
}

std::vector<VkFramebuffer> framebuffers;
for (int i = 0; i < framesInFlight; ++i) {
    ...
    info.pAttachments = &imageViews[i];
    ...
    vkCreateFramebuffer(device, &info, nullptr, &framebuffers[i]);
}

If you have multiple image view attachments:

std::array<VkImageView, 2> attachmentImageViews;
std::vector<VkFramebuffer> framebuffers;
for (int i = 0; i < framesInFlight; ++i) {
    ...
    attachmentImageViews = { msaaImageView, imageView[i] }; // these need to have been already created
    info.attachmentCount = 2;
    info.pAttachments = attachmentImageViews.data();
    ...
    vkCreateFramebuffer(device, &info, nullptr, &framebuffers[i]);
}

The Vulkan spec states:

If flags does not include VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT and attachmentCount is not 0, pAttachments must be a valid pointer to an array of attachmentCount valid VkImageView handles

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