Method prepare_render_pass

cube/cube.cpp:2688–2751

}

void Demo::prepare_render_pass() {
    // The initial layout for the color and depth attachments will be LAYOUT_UNDEFINED
    // because at the start of the renderpass, we don't care about their contents.
    // At the start of the subpass, the color attachment's layout will be transitioned
    // to LAYOUT_COLOR_ATTACHMENT_OPTIMAL and the depth stencil attachment's layout
    // will be transitioned to LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL.  At the end of
    // the renderpass, the color attachment's layout will be transitioned to
    // LAYOUT_PRESENT_SRC_KHR to be ready to present.  This is all done as part of
    // the renderpass, no barriers are necessary.
    std::array<vk::AttachmentDescription, 2> const attachments = {
        vk::AttachmentDescription()
            .setFormat(format)
            .setSamples(vk::SampleCountFlagBits::e1)
            .setLoadOp(vk::AttachmentLoadOp::eClear)
            .setStoreOp(vk::AttachmentStoreOp::eStore)
            .setStencilLoadOp(vk::AttachmentLoadOp::eDontCare)
            .setStencilStoreOp(vk::AttachmentStoreOp::eDontCare)
            .setInitialLayout(vk::ImageLayout::eUndefined)
            .setFinalLayout(vk::ImageLayout::ePresentSrcKHR),
        vk::AttachmentDescription()
            .setFormat(depth.format)
            .setSamples(vk::SampleCountFlagBits::e1)
            .setLoadOp(vk::AttachmentLoadOp::eClear)
            .setStoreOp(vk::AttachmentStoreOp::eDontCare)
            .setStencilLoadOp(vk::AttachmentLoadOp::eDontCare)
            .setStencilStoreOp(vk::AttachmentStoreOp::eDontCare)
            .setInitialLayout(vk::ImageLayout::eUndefined)
            .setFinalLayout(vk::ImageLayout::eDepthStencilAttachmentOptimal)};

    auto const color_reference = vk::AttachmentReference().setAttachment(0).setLayout(vk::ImageLayout::eColorAttachmentOptimal);

    auto const depth_reference =
        vk::AttachmentReference().setAttachment(1).setLayout(vk::ImageLayout::eDepthStencilAttachmentOptimal);

    auto const subpass = vk::SubpassDescription()
                             .setPipelineBindPoint(vk::PipelineBindPoint::eGraphics)
                             .setColorAttachments(color_reference)
                             .setPDepthStencilAttachment(&depth_reference);

    vk::PipelineStageFlags stages = vk::PipelineStageFlagBits::eEarlyFragmentTests | vk::PipelineStageFlagBits::eLateFragmentTests;
    std::array<vk::SubpassDependency, 2> const dependencies = {
        vk::SubpassDependency()  // Depth buffer is shared between swapchain images
            .setSrcSubpass(VK_SUBPASS_EXTERNAL)
            .setDstSubpass(0)
            .setSrcStageMask(stages)
            .setDstStageMask(stages)
            .setSrcAccessMask(vk::AccessFlagBits::eDepthStencilAttachmentWrite)
            .setDstAccessMask(vk::AccessFlagBits::eDepthStencilAttachmentRead | vk::AccessFlagBits::eDepthStencilAttachmentWrite)
            .setDependencyFlags(vk::DependencyFlags()),
        vk::SubpassDependency()  // Image layout transition
            .setSrcSubpass(VK_SUBPASS_EXTERNAL)
            .setDstSubpass(0)
            .setSrcStageMask(vk::PipelineStageFlagBits::eColorAttachmentOutput)
            .setDstStageMask(vk::PipelineStageFlagBits::eColorAttachmentOutput)
            .setSrcAccessMask(vk::AccessFlagBits())
            .setDstAccessMask(vk::AccessFlagBits::eColorAttachmentWrite | vk::AccessFlagBits::eColorAttachmentRead)
            .setDependencyFlags(vk::DependencyFlags()),
    };