Method setupRenderpass

examples/vulkan/Vulkan.cpp:979–1043

Setup renderpass and its subpass dependencies

    // Setup renderpass and its subpass dependencies
    void setupRenderpass()
    {
        std::array<VkAttachmentDescription, 2> attachmentDescriptions{};

        // Color attachment
        attachmentDescriptions[0]                = VkAttachmentDescription();
        attachmentDescriptions[0].format         = swapchainFormat.format;
        attachmentDescriptions[0].samples        = VK_SAMPLE_COUNT_1_BIT;
        attachmentDescriptions[0].loadOp         = VK_ATTACHMENT_LOAD_OP_CLEAR;
        attachmentDescriptions[0].storeOp        = VK_ATTACHMENT_STORE_OP_STORE;
        attachmentDescriptions[0].stencilLoadOp  = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
        attachmentDescriptions[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
        attachmentDescriptions[0].initialLayout  = VK_IMAGE_LAYOUT_UNDEFINED;
        attachmentDescriptions[0].finalLayout    = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;

        // Depth attachment
        attachmentDescriptions[1]                = VkAttachmentDescription();
        attachmentDescriptions[1].format         = depthFormat;
        attachmentDescriptions[1].samples        = VK_SAMPLE_COUNT_1_BIT;
        attachmentDescriptions[1].loadOp         = VK_ATTACHMENT_LOAD_OP_CLEAR;
        attachmentDescriptions[1].storeOp        = VK_ATTACHMENT_STORE_OP_DONT_CARE;
        attachmentDescriptions[1].stencilLoadOp  = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
        attachmentDescriptions[1].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
        attachmentDescriptions[1].initialLayout  = VK_IMAGE_LAYOUT_UNDEFINED;
        attachmentDescriptions[1].finalLayout    = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

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

        VkAttachmentReference depthStencilAttachmentReference = {};
        depthStencilAttachmentReference.attachment            = 1;
        depthStencilAttachmentReference.layout                = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

        // Set up the renderpass to depend on commands that execute before the renderpass begins
        VkSubpassDescription subpassDescription    = VkSubpassDescription();
        subpassDescription.pipelineBindPoint       = VK_PIPELINE_BIND_POINT_GRAPHICS;
        subpassDescription.colorAttachmentCount    = 1;
        subpassDescription.pColorAttachments       = &colorAttachmentReference;
        subpassDescription.pDepthStencilAttachment = &depthStencilAttachmentReference;

        VkSubpassDependency subpassDependency = VkSubpassDependency();
        subpassDependency.srcSubpass          = VK_SUBPASS_EXTERNAL;
        subpassDependency.srcStageMask        = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
        subpassDependency.srcAccessMask       = 0;
        subpassDependency.dstSubpass          = 0;
        subpassDependency.dstStageMask        = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
        subpassDependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;

        VkRenderPassCreateInfo renderPassCreateInfo = VkRenderPassCreateInfo();
        renderPassCreateInfo.sType                  = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
        renderPassCreateInfo.attachmentCount        = static_cast<std::uint32_t>(attachmentDescriptions.size());
        renderPassCreateInfo.pAttachments           = attachmentDescriptions.data();
        renderPassCreateInfo.subpassCount           = 1;
        renderPassCreateInfo.pSubpasses             = &subpassDescription;
        renderPassCreateInfo.dependencyCount        = 1;
        renderPassCreateInfo.pDependencies          = &subpassDependency;