/*
 * Copyright (c) 2015-2016 The Khronos Group Inc.
 * Copyright (c) 2015-2016 Valve Corporation
 * Copyright (c) 2015-2016 LunarG, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Author: Ian Elliott <ian@lunarg.com>
 * Author: Jon Ashburn <jon@lunarg.com>
 * Author: Ian Elliott <ianelliott@google.com>
 * Author: Mark Lobodzinski <mark@lunarg.com>
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vk_loader_platform.h"
#include "loader.h"
#include "wsi.h"
#include <vulkan/vk_icd.h>

// The first ICD/Loader interface that support querying the SurfaceKHR from
// the ICDs.
#define ICD_VER_SUPPORTS_ICD_SURFACE_KHR 3

void wsi_create_instance(struct loader_instance *ptr_instance, const VkInstanceCreateInfo *pCreateInfo) {
    ptr_instance->wsi_surface_enabled = false;

#ifdef VK_USE_PLATFORM_WIN32_KHR
    ptr_instance->wsi_win32_surface_enabled = false;
#endif  // VK_USE_PLATFORM_WIN32_KHR
#ifdef VK_USE_PLATFORM_MIR_KHR
    ptr_instance->wsi_mir_surface_enabled = false;
#endif  // VK_USE_PLATFORM_MIR_KHR
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
    ptr_instance->wsi_wayland_surface_enabled = false;
#endif  // VK_USE_PLATFORM_WAYLAND_KHR
#ifdef VK_USE_PLATFORM_XCB_KHR
    ptr_instance->wsi_xcb_surface_enabled = false;
#endif  // VK_USE_PLATFORM_XCB_KHR
#ifdef VK_USE_PLATFORM_XLIB_KHR
    ptr_instance->wsi_xlib_surface_enabled = false;
#endif  // VK_USE_PLATFORM_XLIB_KHR
#ifdef VK_USE_PLATFORM_ANDROID_KHR
    ptr_instance->wsi_android_surface_enabled = false;
#endif  // VK_USE_PLATFORM_ANDROID_KHR

    ptr_instance->wsi_display_enabled = false;

    for (uint32_t i = 0; i < pCreateInfo->enabledExtensionCount; i++) {
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_surface_enabled = true;
            continue;
        }
#ifdef VK_USE_PLATFORM_WIN32_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_WIN32_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_win32_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_WIN32_KHR
#ifdef VK_USE_PLATFORM_MIR_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_MIR_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_mir_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_MIR_KHR
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_wayland_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_WAYLAND_KHR
#ifdef VK_USE_PLATFORM_XCB_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_XCB_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_xcb_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_XCB_KHR
#ifdef VK_USE_PLATFORM_XLIB_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_XLIB_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_xlib_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_XLIB_KHR
#ifdef VK_USE_PLATFORM_ANDROID_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_ANDROID_SURFACE_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_android_surface_enabled = true;
            continue;
        }
#endif  // VK_USE_PLATFORM_ANDROID_KHR
        if (strcmp(pCreateInfo->ppEnabledExtensionNames[i], VK_KHR_DISPLAY_EXTENSION_NAME) == 0) {
            ptr_instance->wsi_display_enabled = true;
            continue;
        }
    }
}

// Linux WSI surface extensions are not always compiled into the loader. (Assume
// for Windows the KHR_win32_surface is always compiled into loader). A given
// Linux build environment might not have the headers required for building one
// of the four extensions  (Xlib, Xcb, Mir, Wayland).  Thus, need to check if
// the built loader actually supports the particular Linux surface extension.
// If not supported by the built loader it will not be included in the list of
// enumerated instance extensions.  This solves the issue where an ICD or layer
// advertises support for a given Linux surface extension but the loader was not
// built to support the extension.
bool wsi_unsupported_instance_extension(const VkExtensionProperties *ext_prop) {
#ifndef VK_USE_PLATFORM_MIR_KHR
    if (!strcmp(ext_prop->extensionName, "VK_KHR_mir_surface")) return true;
#endif  // VK_USE_PLATFORM_MIR_KHR
#ifndef VK_USE_PLATFORM_WAYLAND_KHR
    if (!strcmp(ext_prop->extensionName, "VK_KHR_wayland_surface")) return true;
#endif  // VK_USE_PLATFORM_WAYLAND_KHR
#ifndef VK_USE_PLATFORM_XCB_KHR
    if (!strcmp(ext_prop->extensionName, "VK_KHR_xcb_surface")) return true;
#endif  // VK_USE_PLATFORM_XCB_KHR
#ifndef VK_USE_PLATFORM_XLIB_KHR
    if (!strcmp(ext_prop->extensionName, "VK_KHR_xlib_surface")) return true;
#endif  // VK_USE_PLATFORM_XLIB_KHR

    return false;
}

// Functions for the VK_KHR_surface extension:

// This is the trampoline entrypoint for DestroySurfaceKHR
LOADER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroySurfaceKHR(VkInstance instance, VkSurfaceKHR surface,
                                                             const VkAllocationCallbacks *pAllocator) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    disp->DestroySurfaceKHR(instance, surface, pAllocator);
}

// TODO probably need to lock around all the loader_get_instance() calls.

// This is the instance chain terminator function for DestroySurfaceKHR
VKAPI_ATTR void VKAPI_CALL terminator_DestroySurfaceKHR(VkInstance instance, VkSurfaceKHR surface,
                                                        const VkAllocationCallbacks *pAllocator) {
    struct loader_instance *ptr_instance = loader_get_instance(instance);

    VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)surface;
    if (NULL != icd_surface) {
        if (NULL != icd_surface->real_icd_surfaces) {
            uint32_t i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
                    if (NULL != icd_term->dispatch.DestroySurfaceKHR && (VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[i]) {
                        icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, icd_surface->real_icd_surfaces[i], pAllocator);
                        icd_surface->real_icd_surfaces[i] = (VkSurfaceKHR)NULL;
                    }
                } else {
                    // The real_icd_surface for any ICD not supporting the
                    // proper interface version should be NULL.  If not, then
                    // we have a problem.
                    assert((VkSurfaceKHR)NULL == icd_surface->real_icd_surfaces[i]);
                }
            }
            loader_instance_heap_free(ptr_instance, icd_surface->real_icd_surfaces);
        }

        loader_instance_heap_free(ptr_instance, (void *)(uintptr_t)surface);
    }
}

// This is the trampoline entrypoint for GetPhysicalDeviceSurfaceSupportKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceSurfaceSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                  uint32_t queueFamilyIndex, VkSurfaceKHR surface,
                                                                                  VkBool32 *pSupported) {
    const VkLayerInstanceDispatchTable *disp;
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceSurfaceSupportKHR(unwrapped_phys_dev, queueFamilyIndex, surface, pSupported);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceSurfaceSupportKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceSurfaceSupportKHR(VkPhysicalDevice physicalDevice,
                                                                             uint32_t queueFamilyIndex, VkSurfaceKHR surface,
                                                                             VkBool32 *pSupported) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_surface extension not enabled.  vkGetPhysicalDeviceSurfaceSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == pSupported) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "NULL pointer passed into vkGetPhysicalDeviceSurfaceSupportKHR for pSupported!\n");
        assert(false && "GetPhysicalDeviceSurfaceSupportKHR: Error, null pSupported");
    }
    *pSupported = false;

    if (NULL == icd_term->dispatch.GetPhysicalDeviceSurfaceSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceSurfaceSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceSurfaceSupportKHR ICD pointer");
    }

    VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)surface;
    if (NULL != icd_surface->real_icd_surfaces && (VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[phys_dev_term->icd_index]) {
        return icd_term->dispatch.GetPhysicalDeviceSurfaceSupportKHR(
            phys_dev_term->phys_dev, queueFamilyIndex, icd_surface->real_icd_surfaces[phys_dev_term->icd_index], pSupported);
    }

    return icd_term->dispatch.GetPhysicalDeviceSurfaceSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex, surface, pSupported);
}

// This is the trampoline entrypoint for GetPhysicalDeviceSurfaceCapabilitiesKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
    VkPhysicalDevice physicalDevice, VkSurfaceKHR surface, VkSurfaceCapabilitiesKHR *pSurfaceCapabilities) {
    const VkLayerInstanceDispatchTable *disp;
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceSurfaceCapabilitiesKHR(unwrapped_phys_dev, surface, pSurfaceCapabilities);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceSurfaceCapabilitiesKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceSurfaceCapabilitiesKHR(VkPhysicalDevice physicalDevice,
                                                                                  VkSurfaceKHR surface,
                                                                                  VkSurfaceCapabilitiesKHR *pSurfaceCapabilities) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_surface extension not enabled.  vkGetPhysicalDeviceSurfaceCapabilitiesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == pSurfaceCapabilities) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "NULL pointer passed into vkGetPhysicalDeviceSurfaceCapabilitiesKHR for pSurfaceCapabilities!\n");
        assert(false && "GetPhysicalDeviceSurfaceCapabilitiesKHR: Error, null pSurfaceCapabilities");
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceSurfaceCapabilitiesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceSurfaceCapabilitiesKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceSurfaceCapabilitiesKHR ICD pointer");
    }

    VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)surface;
    if (NULL != icd_surface->real_icd_surfaces && (VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[phys_dev_term->icd_index]) {
        return icd_term->dispatch.GetPhysicalDeviceSurfaceCapabilitiesKHR(
            phys_dev_term->phys_dev, icd_surface->real_icd_surfaces[phys_dev_term->icd_index], pSurfaceCapabilities);
    }

    return icd_term->dispatch.GetPhysicalDeviceSurfaceCapabilitiesKHR(phys_dev_term->phys_dev, surface, pSurfaceCapabilities);
}

// This is the trampoline entrypoint for GetPhysicalDeviceSurfaceFormatsKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceSurfaceFormatsKHR(VkPhysicalDevice physicalDevice,
                                                                                  VkSurfaceKHR surface,
                                                                                  uint32_t *pSurfaceFormatCount,
                                                                                  VkSurfaceFormatKHR *pSurfaceFormats) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceSurfaceFormatsKHR(unwrapped_phys_dev, surface, pSurfaceFormatCount, pSurfaceFormats);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceSurfaceFormatsKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceSurfaceFormatsKHR(VkPhysicalDevice physicalDevice, VkSurfaceKHR surface,
                                                                             uint32_t *pSurfaceFormatCount,
                                                                             VkSurfaceFormatKHR *pSurfaceFormats) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_surface extension not enabled.  vkGetPhysicalDeviceSurfaceFormatsKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == pSurfaceFormatCount) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "NULL pointer passed into vkGetPhysicalDeviceSurfaceFormatsKHR for pSurfaceFormatCount!\n");
        assert(false && "GetPhysicalDeviceSurfaceFormatsKHR(: Error, null pSurfaceFormatCount");
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceSurfaceFormatsKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceSurfaceCapabilitiesKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceSurfaceFormatsKHR ICD pointer");
    }

    VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)surface;
    if (NULL != icd_surface->real_icd_surfaces && (VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[phys_dev_term->icd_index]) {
        return icd_term->dispatch.GetPhysicalDeviceSurfaceFormatsKHR(phys_dev_term->phys_dev,
                                                                     icd_surface->real_icd_surfaces[phys_dev_term->icd_index],
                                                                     pSurfaceFormatCount, pSurfaceFormats);
    }

    return icd_term->dispatch.GetPhysicalDeviceSurfaceFormatsKHR(phys_dev_term->phys_dev, surface, pSurfaceFormatCount,
                                                                 pSurfaceFormats);
}

// This is the trampoline entrypoint for GetPhysicalDeviceSurfacePresentModesKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceSurfacePresentModesKHR(VkPhysicalDevice physicalDevice,
                                                                                       VkSurfaceKHR surface,
                                                                                       uint32_t *pPresentModeCount,
                                                                                       VkPresentModeKHR *pPresentModes) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceSurfacePresentModesKHR(unwrapped_phys_dev, surface, pPresentModeCount, pPresentModes);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceSurfacePresentModesKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceSurfacePresentModesKHR(VkPhysicalDevice physicalDevice,
                                                                                  VkSurfaceKHR surface, uint32_t *pPresentModeCount,
                                                                                  VkPresentModeKHR *pPresentModes) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_surface extension not enabled.  vkGetPhysicalDeviceSurfacePresentModesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == pPresentModeCount) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "NULL pointer passed into vkGetPhysicalDeviceSurfacePresentModesKHR for pPresentModeCount!\n");
        assert(false && "GetPhysicalDeviceSurfacePresentModesKHR(: Error, null pPresentModeCount");
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceSurfacePresentModesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceSurfacePresentModesKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceSurfacePresentModesKHR ICD pointer");
    }

    VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)surface;
    if (NULL != icd_surface->real_icd_surfaces && (VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[phys_dev_term->icd_index]) {
        return icd_term->dispatch.GetPhysicalDeviceSurfacePresentModesKHR(
            phys_dev_term->phys_dev, icd_surface->real_icd_surfaces[phys_dev_term->icd_index], pPresentModeCount, pPresentModes);
    }

    return icd_term->dispatch.GetPhysicalDeviceSurfacePresentModesKHR(phys_dev_term->phys_dev, surface, pPresentModeCount,
                                                                      pPresentModes);
}

// Functions for the VK_KHR_swapchain extension:

// This is the trampoline entrypoint for CreateSwapchainKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateSwapchainKHR(VkDevice device, const VkSwapchainCreateInfoKHR *pCreateInfo,
                                                                  const VkAllocationCallbacks *pAllocator,
                                                                  VkSwapchainKHR *pSwapchain) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(device);
    return disp->CreateSwapchainKHR(device, pCreateInfo, pAllocator, pSwapchain);
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateSwapchainKHR(VkDevice device, const VkSwapchainCreateInfoKHR *pCreateInfo,
                                                             const VkAllocationCallbacks *pAllocator,
                                                             VkSwapchainKHR *pSwapchain) {
    uint32_t icd_index = 0;
    struct loader_device *dev;
    struct loader_icd_term *icd_term = loader_get_icd_and_device(device, &dev, &icd_index);
    if (NULL != icd_term && NULL != icd_term->dispatch.CreateSwapchainKHR) {
        VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)pCreateInfo->surface;
        if (NULL != icd_surface->real_icd_surfaces) {
            if ((VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[icd_index]) {
                // We found the ICD, and there is an ICD KHR surface
                // associated with it, so copy the CreateInfo struct
                // and point it at the ICD's surface.
                VkSwapchainCreateInfoKHR *pCreateCopy = loader_stack_alloc(sizeof(VkSwapchainCreateInfoKHR));
                if (NULL == pCreateCopy) {
                    return VK_ERROR_OUT_OF_HOST_MEMORY;
                }
                memcpy(pCreateCopy, pCreateInfo, sizeof(VkSwapchainCreateInfoKHR));
                pCreateCopy->surface = icd_surface->real_icd_surfaces[icd_index];
                return icd_term->dispatch.CreateSwapchainKHR(device, pCreateCopy, pAllocator, pSwapchain);
            }
        }
        return icd_term->dispatch.CreateSwapchainKHR(device, pCreateInfo, pAllocator, pSwapchain);
    }
    return VK_SUCCESS;
}

// This is the trampoline entrypoint for DestroySwapchainKHR
LOADER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroySwapchainKHR(VkDevice device, VkSwapchainKHR swapchain,
                                                               const VkAllocationCallbacks *pAllocator) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(device);
    disp->DestroySwapchainKHR(device, swapchain, pAllocator);
}

// This is the trampoline entrypoint for GetSwapchainImagesKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetSwapchainImagesKHR(VkDevice device, VkSwapchainKHR swapchain,
                                                                     uint32_t *pSwapchainImageCount, VkImage *pSwapchainImages) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(device);
    return disp->GetSwapchainImagesKHR(device, swapchain, pSwapchainImageCount, pSwapchainImages);
}

// This is the trampoline entrypoint for AcquireNextImageKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkAcquireNextImageKHR(VkDevice device, VkSwapchainKHR swapchain, uint64_t timeout,
                                                                   VkSemaphore semaphore, VkFence fence, uint32_t *pImageIndex) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(device);
    return disp->AcquireNextImageKHR(device, swapchain, timeout, semaphore, fence, pImageIndex);
}

// This is the trampoline entrypoint for QueuePresentKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkQueuePresentKHR(VkQueue queue, const VkPresentInfoKHR *pPresentInfo) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(queue);
    return disp->QueuePresentKHR(queue, pPresentInfo);
}

static VkIcdSurface *AllocateIcdSurfaceStruct(struct loader_instance *instance, size_t base_size, size_t platform_size) {
    // Next, if so, proceed with the implementation of this function:
    VkIcdSurface *pIcdSurface = loader_instance_heap_alloc(instance, sizeof(VkIcdSurface), VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
    if (pIcdSurface != NULL) {
        // Setup the new sizes and offsets so we can grow the structures in the
        // future without having problems
        pIcdSurface->base_size = (uint32_t)base_size;
        pIcdSurface->platform_size = (uint32_t)platform_size;
        pIcdSurface->non_platform_offset = (uint32_t)((uint8_t *)(&pIcdSurface->base_size) - (uint8_t *)pIcdSurface);
        pIcdSurface->entire_size = sizeof(VkIcdSurface);

        pIcdSurface->real_icd_surfaces = loader_instance_heap_alloc(instance, sizeof(VkSurfaceKHR) * instance->total_icd_count,
                                                                    VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
        if (pIcdSurface->real_icd_surfaces == NULL) {
            loader_instance_heap_free(instance, pIcdSurface);
            pIcdSurface = NULL;
        } else {
            memset(pIcdSurface->real_icd_surfaces, 0, sizeof(VkSurfaceKHR) * instance->total_icd_count);
        }
    }
    return pIcdSurface;
}

#ifdef VK_USE_PLATFORM_WIN32_KHR

// Functions for the VK_KHR_win32_surface extension:

// This is the trampoline entrypoint for CreateWin32SurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateWin32SurfaceKHR(VkInstance instance,
                                                                     const VkWin32SurfaceCreateInfoKHR *pCreateInfo,
                                                                     const VkAllocationCallbacks *pAllocator,
                                                                     VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateWin32SurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateWin32SurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateWin32SurfaceKHR(VkInstance instance, const VkWin32SurfaceCreateInfoKHR *pCreateInfo,
                                                                const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    VkResult vkRes = VK_SUCCESS;
    VkIcdSurface *pIcdSurface = NULL;
    uint32_t i = 0;

    // Initialize pSurface to NULL just to be safe.
    *pSurface = VK_NULL_HANDLE;
    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_win32_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_win32_surface extension not enabled.  vkCreateWin32SurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(ptr_instance, sizeof(pIcdSurface->win_surf.base), sizeof(pIcdSurface->win_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->win_surf.base.platform = VK_ICD_WSI_PLATFORM_WIN32;
    pIcdSurface->win_surf.hinstance = pCreateInfo->hinstance;
    pIcdSurface->win_surf.hwnd = pCreateInfo->hwnd;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateWin32SurfaceKHR) {
                vkRes = icd_term->dispatch.CreateWin32SurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                                 &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)(pIcdSurface);

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(ptr_instance, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(ptr_instance, pIcdSurface);
    }

    return vkRes;
}

// This is the trampoline entrypoint for
// GetPhysicalDeviceWin32PresentationSupportKHR
LOADER_EXPORT VKAPI_ATTR VkBool32 VKAPI_CALL vkGetPhysicalDeviceWin32PresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                            uint32_t queueFamilyIndex) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkBool32 res = disp->GetPhysicalDeviceWin32PresentationSupportKHR(unwrapped_phys_dev, queueFamilyIndex);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceWin32PresentationSupportKHR
VKAPI_ATTR VkBool32 VKAPI_CALL terminator_GetPhysicalDeviceWin32PresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                       uint32_t queueFamilyIndex) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_win32_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_win32_surface extension not enabled.  vkGetPhysicalDeviceWin32PresentationSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceWin32PresentationSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceWin32PresentationSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceWin32PresentationSupportKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceWin32PresentationSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex);
}
#endif  // VK_USE_PLATFORM_WIN32_KHR

#ifdef VK_USE_PLATFORM_MIR_KHR

// Functions for the VK_KHR_mir_surface extension:

// This is the trampoline entrypoint for CreateMirSurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateMirSurfaceKHR(VkInstance instance,
                                                                   const VkMirSurfaceCreateInfoKHR *pCreateInfo,
                                                                   const VkAllocationCallbacks *pAllocator,
                                                                   VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateMirSurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateMirSurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateMirSurfaceKHR(VkInstance instance, const VkMirSurfaceCreateInfoKHR *pCreateInfo,
                                                              const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    VkResult vkRes = VK_SUCCESS;
    VkIcdSurface *pIcdSurface = NULL;
    uint32_t i = 0;

    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_mir_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_mir_surface extension not enabled.  vkCreateMirSurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(ptr_instance, sizeof(pIcdSurface->mir_surf.base), sizeof(pIcdSurface->mir_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->mir_surf.base.platform = VK_ICD_WSI_PLATFORM_MIR;
    pIcdSurface->mir_surf.connection = pCreateInfo->connection;
    pIcdSurface->mir_surf.mirSurface = pCreateInfo->mirSurface;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateMirSurfaceKHR) {
                vkRes = icd_term->dispatch.CreateMirSurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                               &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)pIcdSurface;

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(ptr_instance, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(ptr_instance, pIcdSurface);
    }

    return vkRes;
}

// This is the trampoline entrypoint for
// GetPhysicalDeviceMirPresentationSupportKHR
LOADER_EXPORT VKAPI_ATTR VkBool32 VKAPI_CALL vkGetPhysicalDeviceMirPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                          uint32_t queueFamilyIndex,
                                                                                          MirConnection *connection) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkBool32 res = disp->GetPhysicalDeviceMirPresentationSupportKHR(unwrapped_phys_dev, queueFamilyIndex, connection);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceMirPresentationSupportKHR
VKAPI_ATTR VkBool32 VKAPI_CALL terminator_GetPhysicalDeviceMirPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                     uint32_t queueFamilyIndex,
                                                                                     MirConnection *connection) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_mir_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_mir_surface extension not enabled.  vkGetPhysicalDeviceMirPresentationSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceMirPresentationSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceMirPresentationSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceMirPresentationSupportKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceMirPresentationSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex, connection);
}
#endif  // VK_USE_PLATFORM_MIR_KHR

#ifdef VK_USE_PLATFORM_WAYLAND_KHR

// This is the trampoline entrypoint for CreateWaylandSurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateWaylandSurfaceKHR(VkInstance instance,
                                                                       const VkWaylandSurfaceCreateInfoKHR *pCreateInfo,
                                                                       const VkAllocationCallbacks *pAllocator,
                                                                       VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateWaylandSurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateWaylandSurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateWaylandSurfaceKHR(VkInstance instance,
                                                                  const VkWaylandSurfaceCreateInfoKHR *pCreateInfo,
                                                                  const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    VkResult vkRes = VK_SUCCESS;
    VkIcdSurface *pIcdSurface = NULL;
    uint32_t i = 0;

    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_wayland_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_wayland_surface extension not enabled.  vkCreateWaylandSurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(ptr_instance, sizeof(pIcdSurface->wayland_surf.base), sizeof(pIcdSurface->wayland_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->wayland_surf.base.platform = VK_ICD_WSI_PLATFORM_WAYLAND;
    pIcdSurface->wayland_surf.display = pCreateInfo->display;
    pIcdSurface->wayland_surf.surface = pCreateInfo->surface;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateWaylandSurfaceKHR) {
                vkRes = icd_term->dispatch.CreateWaylandSurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                                   &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)pIcdSurface;

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(ptr_instance, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(ptr_instance, pIcdSurface);
    }

    return vkRes;
}

// This is the trampoline entrypoint for
// GetPhysicalDeviceWaylandPresentationSupportKHR
LOADER_EXPORT VKAPI_ATTR VkBool32 VKAPI_CALL vkGetPhysicalDeviceWaylandPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                              uint32_t queueFamilyIndex,
                                                                                              struct wl_display *display) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkBool32 res = disp->GetPhysicalDeviceWaylandPresentationSupportKHR(unwrapped_phys_dev, queueFamilyIndex, display);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceWaylandPresentationSupportKHR
VKAPI_ATTR VkBool32 VKAPI_CALL terminator_GetPhysicalDeviceWaylandPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                         uint32_t queueFamilyIndex,
                                                                                         struct wl_display *display) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_wayland_surface_enabled) {
        loader_log(
            ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
            "VK_KHR_wayland_surface extension not enabled.  vkGetPhysicalDeviceWaylandPresentationSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceWaylandPresentationSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceWaylandPresentationSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceWaylandPresentationSupportKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceWaylandPresentationSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex, display);
}
#endif  // VK_USE_PLATFORM_WAYLAND_KHR

#ifdef VK_USE_PLATFORM_XCB_KHR

// Functions for the VK_KHR_xcb_surface extension:

// This is the trampoline entrypoint for CreateXcbSurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateXcbSurfaceKHR(VkInstance instance,
                                                                   const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
                                                                   const VkAllocationCallbacks *pAllocator,
                                                                   VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateXcbSurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateXcbSurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateXcbSurfaceKHR(VkInstance instance, const VkXcbSurfaceCreateInfoKHR *pCreateInfo,
                                                              const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    VkResult vkRes = VK_SUCCESS;
    VkIcdSurface *pIcdSurface = NULL;
    uint32_t i = 0;

    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_xcb_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_xcb_surface extension not enabled.  vkCreateXcbSurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(ptr_instance, sizeof(pIcdSurface->xcb_surf.base), sizeof(pIcdSurface->xcb_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->xcb_surf.base.platform = VK_ICD_WSI_PLATFORM_XCB;
    pIcdSurface->xcb_surf.connection = pCreateInfo->connection;
    pIcdSurface->xcb_surf.window = pCreateInfo->window;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateXcbSurfaceKHR) {
                vkRes = icd_term->dispatch.CreateXcbSurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                               &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)pIcdSurface;

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(ptr_instance, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(ptr_instance, pIcdSurface);
    }

    return vkRes;
}

// This is the trampoline entrypoint for
// GetPhysicalDeviceXcbPresentationSupportKHR
LOADER_EXPORT VKAPI_ATTR VkBool32 VKAPI_CALL vkGetPhysicalDeviceXcbPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                          uint32_t queueFamilyIndex,
                                                                                          xcb_connection_t *connection,
                                                                                          xcb_visualid_t visual_id) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkBool32 res = disp->GetPhysicalDeviceXcbPresentationSupportKHR(unwrapped_phys_dev, queueFamilyIndex, connection, visual_id);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceXcbPresentationSupportKHR
VKAPI_ATTR VkBool32 VKAPI_CALL terminator_GetPhysicalDeviceXcbPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                     uint32_t queueFamilyIndex,
                                                                                     xcb_connection_t *connection,
                                                                                     xcb_visualid_t visual_id) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_xcb_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_xcb_surface extension not enabled.  vkGetPhysicalDeviceXcbPresentationSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceXcbPresentationSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceXcbPresentationSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceXcbPresentationSupportKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceXcbPresentationSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex, connection,
                                                                         visual_id);
}
#endif  // VK_USE_PLATFORM_XCB_KHR

#ifdef VK_USE_PLATFORM_XLIB_KHR

// Functions for the VK_KHR_xlib_surface extension:

// This is the trampoline entrypoint for CreateXlibSurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateXlibSurfaceKHR(VkInstance instance,
                                                                    const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
                                                                    const VkAllocationCallbacks *pAllocator,
                                                                    VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateXlibSurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateXlibSurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateXlibSurfaceKHR(VkInstance instance, const VkXlibSurfaceCreateInfoKHR *pCreateInfo,
                                                               const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    VkResult vkRes = VK_SUCCESS;
    VkIcdSurface *pIcdSurface = NULL;
    uint32_t i = 0;

    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_xlib_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_xlib_surface extension not enabled.  vkCreateXlibSurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(ptr_instance, sizeof(pIcdSurface->xlib_surf.base), sizeof(pIcdSurface->xlib_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->xlib_surf.base.platform = VK_ICD_WSI_PLATFORM_XLIB;
    pIcdSurface->xlib_surf.dpy = pCreateInfo->dpy;
    pIcdSurface->xlib_surf.window = pCreateInfo->window;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateXlibSurfaceKHR) {
                vkRes = icd_term->dispatch.CreateXlibSurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                                &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)pIcdSurface;

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = ptr_instance->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(ptr_instance, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(ptr_instance, pIcdSurface);
    }

    return vkRes;
}

// This is the trampoline entrypoint for
// GetPhysicalDeviceXlibPresentationSupportKHR
LOADER_EXPORT VKAPI_ATTR VkBool32 VKAPI_CALL vkGetPhysicalDeviceXlibPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                           uint32_t queueFamilyIndex, Display *dpy,
                                                                                           VisualID visualID) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkBool32 res = disp->GetPhysicalDeviceXlibPresentationSupportKHR(unwrapped_phys_dev, queueFamilyIndex, dpy, visualID);
    return res;
}

// This is the instance chain terminator function for
// GetPhysicalDeviceXlibPresentationSupportKHR
VKAPI_ATTR VkBool32 VKAPI_CALL terminator_GetPhysicalDeviceXlibPresentationSupportKHR(VkPhysicalDevice physicalDevice,
                                                                                      uint32_t queueFamilyIndex, Display *dpy,
                                                                                      VisualID visualID) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_xlib_surface_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_xlib_surface extension not enabled.  vkGetPhysicalDeviceXlibPresentationSupportKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceXlibPresentationSupportKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceXlibPresentationSupportKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceXlibPresentationSupportKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceXlibPresentationSupportKHR(phys_dev_term->phys_dev, queueFamilyIndex, dpy, visualID);
}
#endif  // VK_USE_PLATFORM_XLIB_KHR

#ifdef VK_USE_PLATFORM_ANDROID_KHR

// Functions for the VK_KHR_android_surface extension:

// This is the trampoline entrypoint for CreateAndroidSurfaceKHR
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateAndroidSurfaceKHR(VkInstance instance, ANativeWindow *window,
                                                                       const VkAllocationCallbacks *pAllocator,
                                                                       VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateAndroidSurfaceKHR(instance, window, pAllocator, pSurface);
    return res;
}

// This is the instance chain terminator function for CreateAndroidSurfaceKHR
VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateAndroidSurfaceKHR(VkInstance instance, Window window,
                                                                  const VkAllocationCallbacks *pAllocator, VkSurfaceKHR *pSurface) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_instance *ptr_instance = loader_get_instance(instance);
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkCreateAndroidSurfaceKHR not executed!\n");
        return VK_ERROR_EXTENSION_NOT_PRESENT;
    }

    // Next, if so, proceed with the implementation of this function:
    VkIcdSurfaceAndroid *pIcdSurface =
        loader_instance_heap_alloc(ptr_instance, sizeof(VkIcdSurfaceAndroid), VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
    if (pIcdSurface == NULL) {
        return VK_ERROR_OUT_OF_HOST_MEMORY;
    }

    pIcdSurface->base.platform = VK_ICD_WSI_PLATFORM_ANDROID;
    pIcdSurface->dpy = dpy;
    pIcdSurface->window = window;

    *pSurface = (VkSurfaceKHR)pIcdSurface;

    return VK_SUCCESS;
}

#endif  // VK_USE_PLATFORM_ANDROID_KHR

// Functions for the VK_KHR_display instance extension:
LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceDisplayPropertiesKHR(VkPhysicalDevice physicalDevice,
                                                                                     uint32_t *pPropertyCount,
                                                                                     VkDisplayPropertiesKHR *pProperties) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceDisplayPropertiesKHR(unwrapped_phys_dev, pPropertyCount, pProperties);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceDisplayPropertiesKHR(VkPhysicalDevice physicalDevice,
                                                                                uint32_t *pPropertyCount,
                                                                                VkDisplayPropertiesKHR *pProperties) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkGetPhysicalDeviceDisplayPropertiesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceDisplayPropertiesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceDisplayPropertiesKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceDisplayPropertiesKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceDisplayPropertiesKHR(phys_dev_term->phys_dev, pPropertyCount, pProperties);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetPhysicalDeviceDisplayPlanePropertiesKHR(
    VkPhysicalDevice physicalDevice, uint32_t *pPropertyCount, VkDisplayPlanePropertiesKHR *pProperties) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetPhysicalDeviceDisplayPlanePropertiesKHR(unwrapped_phys_dev, pPropertyCount, pProperties);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_GetPhysicalDeviceDisplayPlanePropertiesKHR(VkPhysicalDevice physicalDevice,
                                                                                     uint32_t *pPropertyCount,
                                                                                     VkDisplayPlanePropertiesKHR *pProperties) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkGetPhysicalDeviceDisplayPlanePropertiesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetPhysicalDeviceDisplayPlanePropertiesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetPhysicalDeviceDisplayPlanePropertiesKHR!\n");
        assert(false && "loader: null GetPhysicalDeviceDisplayPlanePropertiesKHR ICD pointer");
    }

    return icd_term->dispatch.GetPhysicalDeviceDisplayPlanePropertiesKHR(phys_dev_term->phys_dev, pPropertyCount, pProperties);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetDisplayPlaneSupportedDisplaysKHR(VkPhysicalDevice physicalDevice,
                                                                                   uint32_t planeIndex, uint32_t *pDisplayCount,
                                                                                   VkDisplayKHR *pDisplays) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetDisplayPlaneSupportedDisplaysKHR(unwrapped_phys_dev, planeIndex, pDisplayCount, pDisplays);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_GetDisplayPlaneSupportedDisplaysKHR(VkPhysicalDevice physicalDevice, uint32_t planeIndex,
                                                                              uint32_t *pDisplayCount, VkDisplayKHR *pDisplays) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkGetDisplayPlaneSupportedDisplaysKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetDisplayPlaneSupportedDisplaysKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetDisplayPlaneSupportedDisplaysKHR!\n");
        assert(false && "loader: null GetDisplayPlaneSupportedDisplaysKHR ICD pointer");
    }

    return icd_term->dispatch.GetDisplayPlaneSupportedDisplaysKHR(phys_dev_term->phys_dev, planeIndex, pDisplayCount, pDisplays);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetDisplayModePropertiesKHR(VkPhysicalDevice physicalDevice, VkDisplayKHR display,
                                                                           uint32_t *pPropertyCount,
                                                                           VkDisplayModePropertiesKHR *pProperties) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetDisplayModePropertiesKHR(unwrapped_phys_dev, display, pPropertyCount, pProperties);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_GetDisplayModePropertiesKHR(VkPhysicalDevice physicalDevice, VkDisplayKHR display,
                                                                      uint32_t *pPropertyCount,
                                                                      VkDisplayModePropertiesKHR *pProperties) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkGetDisplayModePropertiesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetDisplayModePropertiesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetDisplayModePropertiesKHR!\n");
        assert(false && "loader: null GetDisplayModePropertiesKHR ICD pointer");
    }

    return icd_term->dispatch.GetDisplayModePropertiesKHR(phys_dev_term->phys_dev, display, pPropertyCount, pProperties);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateDisplayModeKHR(VkPhysicalDevice physicalDevice, VkDisplayKHR display,
                                                                    const VkDisplayModeCreateInfoKHR *pCreateInfo,
                                                                    const VkAllocationCallbacks *pAllocator,
                                                                    VkDisplayModeKHR *pMode) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->CreateDisplayModeKHR(unwrapped_phys_dev, display, pCreateInfo, pAllocator, pMode);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateDisplayModeKHR(VkPhysicalDevice physicalDevice, VkDisplayKHR display,
                                                               const VkDisplayModeCreateInfoKHR *pCreateInfo,
                                                               const VkAllocationCallbacks *pAllocator, VkDisplayModeKHR *pMode) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkCreateDisplayModeKHR not executed!\n");
        return VK_ERROR_EXTENSION_NOT_PRESENT;
    }

    if (NULL == icd_term->dispatch.CreateDisplayModeKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkCreateDisplayModeKHR!\n");
        assert(false && "loader: null CreateDisplayModeKHR ICD pointer");
    }

    return icd_term->dispatch.CreateDisplayModeKHR(phys_dev_term->phys_dev, display, pCreateInfo, pAllocator, pMode);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkGetDisplayPlaneCapabilitiesKHR(VkPhysicalDevice physicalDevice,
                                                                              VkDisplayModeKHR mode, uint32_t planeIndex,
                                                                              VkDisplayPlaneCapabilitiesKHR *pCapabilities) {
    VkPhysicalDevice unwrapped_phys_dev = loader_unwrap_physical_device(physicalDevice);
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(physicalDevice);
    VkResult res = disp->GetDisplayPlaneCapabilitiesKHR(unwrapped_phys_dev, mode, planeIndex, pCapabilities);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_GetDisplayPlaneCapabilitiesKHR(VkPhysicalDevice physicalDevice, VkDisplayModeKHR mode,
                                                                         uint32_t planeIndex,
                                                                         VkDisplayPlaneCapabilitiesKHR *pCapabilities) {
    // First, check to ensure the appropriate extension was enabled:
    struct loader_physical_device_term *phys_dev_term = (struct loader_physical_device_term *)physicalDevice;
    struct loader_icd_term *icd_term = phys_dev_term->this_icd_term;
    struct loader_instance *ptr_instance = (struct loader_instance *)icd_term->this_instance;
    if (!ptr_instance->wsi_display_enabled) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_display extension not enabled.  vkGetDisplayPlaneCapabilitiesKHR not executed!\n");
        return VK_SUCCESS;
    }

    if (NULL == icd_term->dispatch.GetDisplayPlaneCapabilitiesKHR) {
        loader_log(ptr_instance, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "ICD for selected physical device is not exporting vkGetDisplayPlaneCapabilitiesKHR!\n");
        assert(false && "loader: null GetDisplayPlaneCapabilitiesKHR ICD pointer");
    }

    return icd_term->dispatch.GetDisplayPlaneCapabilitiesKHR(phys_dev_term->phys_dev, mode, planeIndex, pCapabilities);
}

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateDisplayPlaneSurfaceKHR(VkInstance instance,
                                                                            const VkDisplaySurfaceCreateInfoKHR *pCreateInfo,
                                                                            const VkAllocationCallbacks *pAllocator,
                                                                            VkSurfaceKHR *pSurface) {
    const VkLayerInstanceDispatchTable *disp;
    disp = loader_get_instance_layer_dispatch(instance);
    VkResult res;

    res = disp->CreateDisplayPlaneSurfaceKHR(instance, pCreateInfo, pAllocator, pSurface);
    return res;
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateDisplayPlaneSurfaceKHR(VkInstance instance,
                                                                       const VkDisplaySurfaceCreateInfoKHR *pCreateInfo,
                                                                       const VkAllocationCallbacks *pAllocator,
                                                                       VkSurfaceKHR *pSurface) {
    struct loader_instance *inst = loader_get_instance(instance);
    VkIcdSurface *pIcdSurface = NULL;
    VkResult vkRes = VK_SUCCESS;
    uint32_t i = 0;

    if (!inst->wsi_display_enabled) {
        loader_log(inst, VK_DEBUG_REPORT_ERROR_BIT_EXT, 0,
                   "VK_KHR_surface extension not enabled.  vkCreateDisplayPlaneSurfaceKHR not executed!\n");
        vkRes = VK_ERROR_EXTENSION_NOT_PRESENT;
        goto out;
    }

    // Next, if so, proceed with the implementation of this function:
    pIcdSurface = AllocateIcdSurfaceStruct(inst, sizeof(pIcdSurface->display_surf.base), sizeof(pIcdSurface->display_surf));
    if (pIcdSurface == NULL) {
        vkRes = VK_ERROR_OUT_OF_HOST_MEMORY;
        goto out;
    }

    pIcdSurface->display_surf.base.platform = VK_ICD_WSI_PLATFORM_DISPLAY;
    pIcdSurface->display_surf.displayMode = pCreateInfo->displayMode;
    pIcdSurface->display_surf.planeIndex = pCreateInfo->planeIndex;
    pIcdSurface->display_surf.planeStackIndex = pCreateInfo->planeStackIndex;
    pIcdSurface->display_surf.transform = pCreateInfo->transform;
    pIcdSurface->display_surf.globalAlpha = pCreateInfo->globalAlpha;
    pIcdSurface->display_surf.alphaMode = pCreateInfo->alphaMode;
    pIcdSurface->display_surf.imageExtent = pCreateInfo->imageExtent;

    // Loop through each ICD and determine if they need to create a surface
    for (struct loader_icd_term *icd_term = inst->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
        if (icd_term->scanned_icd->interface_version >= ICD_VER_SUPPORTS_ICD_SURFACE_KHR) {
            if (NULL != icd_term->dispatch.CreateDisplayPlaneSurfaceKHR) {
                vkRes = icd_term->dispatch.CreateDisplayPlaneSurfaceKHR(icd_term->instance, pCreateInfo, pAllocator,
                                                                        &pIcdSurface->real_icd_surfaces[i]);
                if (VK_SUCCESS != vkRes) {
                    goto out;
                }
            }
        }
    }

    *pSurface = (VkSurfaceKHR)pIcdSurface;

out:

    if (VK_SUCCESS != vkRes && NULL != pIcdSurface) {
        if (NULL != pIcdSurface->real_icd_surfaces) {
            i = 0;
            for (struct loader_icd_term *icd_term = inst->icd_terms; icd_term != NULL; icd_term = icd_term->next, i++) {
                if ((VkSurfaceKHR)NULL != pIcdSurface->real_icd_surfaces[i] && NULL != icd_term->dispatch.DestroySurfaceKHR) {
                    icd_term->dispatch.DestroySurfaceKHR(icd_term->instance, pIcdSurface->real_icd_surfaces[i], pAllocator);
                }
            }
            loader_instance_heap_free(inst, pIcdSurface->real_icd_surfaces);
        }
        loader_instance_heap_free(inst, pIcdSurface);
    }

    return vkRes;
}

// EXT_display_swapchain Extension command

LOADER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateSharedSwapchainsKHR(VkDevice device, uint32_t swapchainCount,
                                                                         const VkSwapchainCreateInfoKHR *pCreateInfos,
                                                                         const VkAllocationCallbacks *pAllocator,
                                                                         VkSwapchainKHR *pSwapchains) {
    const VkLayerDispatchTable *disp;
    disp = loader_get_dispatch(device);
    return disp->CreateSharedSwapchainsKHR(device, swapchainCount, pCreateInfos, pAllocator, pSwapchains);
}

VKAPI_ATTR VkResult VKAPI_CALL terminator_CreateSharedSwapchainsKHR(VkDevice device, uint32_t swapchainCount,
                                                                    const VkSwapchainCreateInfoKHR *pCreateInfos,
                                                                    const VkAllocationCallbacks *pAllocator,
                                                                    VkSwapchainKHR *pSwapchains) {
    uint32_t icd_index = 0;
    struct loader_device *dev;
    struct loader_icd_term *icd_term = loader_get_icd_and_device(device, &dev, &icd_index);
    if (NULL != icd_term && NULL != icd_term->dispatch.CreateSharedSwapchainsKHR) {
        VkIcdSurface *icd_surface = (VkIcdSurface *)(uintptr_t)pCreateInfos->surface;
        if (NULL != icd_surface->real_icd_surfaces) {
            if ((VkSurfaceKHR)NULL != icd_surface->real_icd_surfaces[icd_index]) {
                // We found the ICD, and there is an ICD KHR surface
                // associated with it, so copy the CreateInfo struct
                // and point it at the ICD's surface.
                VkSwapchainCreateInfoKHR *pCreateCopy = loader_stack_alloc(sizeof(VkSwapchainCreateInfoKHR) * swapchainCount);
                if (NULL == pCreateCopy) {
                    return VK_ERROR_OUT_OF_HOST_MEMORY;
                }
                memcpy(pCreateCopy, pCreateInfos, sizeof(VkSwapchainCreateInfoKHR) * swapchainCount);
                for (uint32_t sc = 0; sc < swapchainCount; sc++) {
                    pCreateCopy[sc].surface = icd_surface->real_icd_surfaces[icd_index];
                }
                return icd_term->dispatch.CreateSharedSwapchainsKHR(device, swapchainCount, pCreateCopy, pAllocator, pSwapchains);
            }
        }
        return icd_term->dispatch.CreateSharedSwapchainsKHR(device, swapchainCount, pCreateInfos, pAllocator, pSwapchains);
    }
    return VK_SUCCESS;
}

bool wsi_swapchain_instance_gpa(struct loader_instance *ptr_instance, const char *name, void **addr) {
    *addr = NULL;

    // Functions for the VK_KHR_surface extension:
    if (!strcmp("vkDestroySurfaceKHR", name)) {
        *addr = ptr_instance->wsi_surface_enabled ? (void *)vkDestroySurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceSurfaceSupportKHR", name)) {
        *addr = ptr_instance->wsi_surface_enabled ? (void *)vkGetPhysicalDeviceSurfaceSupportKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceSurfaceCapabilitiesKHR", name)) {
        *addr = ptr_instance->wsi_surface_enabled ? (void *)vkGetPhysicalDeviceSurfaceCapabilitiesKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceSurfaceFormatsKHR", name)) {
        *addr = ptr_instance->wsi_surface_enabled ? (void *)vkGetPhysicalDeviceSurfaceFormatsKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceSurfacePresentModesKHR", name)) {
        *addr = ptr_instance->wsi_surface_enabled ? (void *)vkGetPhysicalDeviceSurfacePresentModesKHR : NULL;
        return true;
    }

    // Functions for the VK_KHR_swapchain extension:

    // Note: This is a device extension, and its functions are statically
    // exported from the loader.  Per Khronos decisions, the loader's GIPA
    // function will return the trampoline function for such device-extension
    // functions, regardless of whether the extension has been enabled.
    if (!strcmp("vkCreateSwapchainKHR", name)) {
        *addr = (void *)vkCreateSwapchainKHR;
        return true;
    }
    if (!strcmp("vkDestroySwapchainKHR", name)) {
        *addr = (void *)vkDestroySwapchainKHR;
        return true;
    }
    if (!strcmp("vkGetSwapchainImagesKHR", name)) {
        *addr = (void *)vkGetSwapchainImagesKHR;
        return true;
    }
    if (!strcmp("vkAcquireNextImageKHR", name)) {
        *addr = (void *)vkAcquireNextImageKHR;
        return true;
    }
    if (!strcmp("vkQueuePresentKHR", name)) {
        *addr = (void *)vkQueuePresentKHR;
        return true;
    }

#ifdef VK_USE_PLATFORM_WIN32_KHR

    // Functions for the VK_KHR_win32_surface extension:
    if (!strcmp("vkCreateWin32SurfaceKHR", name)) {
        *addr = ptr_instance->wsi_win32_surface_enabled ? (void *)vkCreateWin32SurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceWin32PresentationSupportKHR", name)) {
        *addr = ptr_instance->wsi_win32_surface_enabled ? (void *)vkGetPhysicalDeviceWin32PresentationSupportKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_WIN32_KHR
#ifdef VK_USE_PLATFORM_MIR_KHR

    // Functions for the VK_KHR_mir_surface extension:
    if (!strcmp("vkCreateMirSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_mir_surface_enabled ? (void *)vkCreateMirSurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceMirPresentationSupportKHR", name)) {
        *addr = ptr_instance->wsi_mir_surface_enabled ? (void *)vkGetPhysicalDeviceMirPresentationSupportKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_MIR_KHR
#ifdef VK_USE_PLATFORM_WAYLAND_KHR

    // Functions for the VK_KHR_wayland_surface extension:
    if (!strcmp("vkCreateWaylandSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_wayland_surface_enabled ? (void *)vkCreateWaylandSurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceWaylandPresentationSupportKHR", name)) {
        *addr = ptr_instance->wsi_wayland_surface_enabled ? (void *)vkGetPhysicalDeviceWaylandPresentationSupportKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_WAYLAND_KHR
#ifdef VK_USE_PLATFORM_XCB_KHR

    // Functions for the VK_KHR_xcb_surface extension:
    if (!strcmp("vkCreateXcbSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_xcb_surface_enabled ? (void *)vkCreateXcbSurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceXcbPresentationSupportKHR", name)) {
        *addr = ptr_instance->wsi_xcb_surface_enabled ? (void *)vkGetPhysicalDeviceXcbPresentationSupportKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_XCB_KHR
#ifdef VK_USE_PLATFORM_XLIB_KHR

    // Functions for the VK_KHR_xlib_surface extension:
    if (!strcmp("vkCreateXlibSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_xlib_surface_enabled ? (void *)vkCreateXlibSurfaceKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceXlibPresentationSupportKHR", name)) {
        *addr = ptr_instance->wsi_xlib_surface_enabled ? (void *)vkGetPhysicalDeviceXlibPresentationSupportKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_XLIB_KHR
#ifdef VK_USE_PLATFORM_ANDROID_KHR

    // Functions for the VK_KHR_android_surface extension:
    if (!strcmp("vkCreateAndroidSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_xlib_surface_enabled ? (void *)vkCreateAndroidSurfaceKHR : NULL;
        return true;
    }
#endif  // VK_USE_PLATFORM_ANDROID_KHR

    // Functions for VK_KHR_display extension:
    if (!strcmp("vkGetPhysicalDeviceDisplayPropertiesKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkGetPhysicalDeviceDisplayPropertiesKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetPhysicalDeviceDisplayPlanePropertiesKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkGetPhysicalDeviceDisplayPlanePropertiesKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetDisplayPlaneSupportedDisplaysKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkGetDisplayPlaneSupportedDisplaysKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetDisplayModePropertiesKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkGetDisplayModePropertiesKHR : NULL;
        return true;
    }
    if (!strcmp("vkCreateDisplayModeKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkCreateDisplayModeKHR : NULL;
        return true;
    }
    if (!strcmp("vkGetDisplayPlaneCapabilitiesKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkGetDisplayPlaneCapabilitiesKHR : NULL;
        return true;
    }
    if (!strcmp("vkCreateDisplayPlaneSurfaceKHR", name)) {
        *addr = ptr_instance->wsi_display_enabled ? (void *)vkCreateDisplayPlaneSurfaceKHR : NULL;
        return true;
    }

    // Functions for KHR_display_swapchain extension:
    if (!strcmp("vkCreateSharedSwapchainsKHR", name)) {
        *addr = (void *)vkCreateSharedSwapchainsKHR;
        return true;
    }

    return false;
}
