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#include <AppKit/AppKit.h>

#include "qcocoavulkaninstance.h"
#include "qcocoawindow.h"

QT_BEGIN_NAMESPACE

QCocoaVulkanInstance::QCocoaVulkanInstance(QVulkanInstance *instance)
    : m_instance(instance)
{
    loadVulkanLibrary(QStringLiteral("vulkan"));
}

QCocoaVulkanInstance::~QCocoaVulkanInstance()
{
}

void QCocoaVulkanInstance::createOrAdoptInstance()
{
    initInstance(m_instance, QByteArrayList() << QByteArrayLiteral("VK_MVK_macos_surface"));
}

VkSurfaceKHR *QCocoaVulkanInstance::surface(QWindow *window)
{
    QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window->handle());
    if (!cocoaWindow->m_vulkanSurface)
        cocoaWindow->m_vulkanSurface = createSurface(cocoaWindow->m_view);
    return &cocoaWindow->m_vulkanSurface;
}

VkSurfaceKHR QCocoaVulkanInstance::createSurface(NSView *view)
{
    if (!m_createSurface) {
        m_createSurface = reinterpret_cast<PFN_vkCreateMacOSSurfaceMVK>(
                    m_vkGetInstanceProcAddr(m_vkInst, "vkCreateMacOSSurfaceMVK"));
    }
    if (!m_createSurface) {
        qWarning("Failed to find vkCreateMacOSSurfaceMVK");
        return m_nullSurface;
    }

    VkMacOSSurfaceCreateInfoMVK surfaceInfo;
    surfaceInfo.sType = VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK;
    surfaceInfo.pNext = nullptr;
    surfaceInfo.flags = 0;
    surfaceInfo.pView = view.layer;

    VkSurfaceKHR surface = nullptr;
    VkResult err = m_createSurface(m_vkInst, &surfaceInfo, nullptr, &surface);
    if (err != VK_SUCCESS)
        qWarning("Failed to create Vulkan surface: %d", err);

    return surface;
}


QT_END_NAMESPACE