loader: Layer init structures

/*

 * Copyright (c) 2015-2016 The Khronos Group Inc.

 * Copyright (c) 2015-2016 Valve Corporation

 * Copyright (c) 2015-2016 LunarG, Inc.

 * Copyright (c) 2016 Google Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and/or associated documentation files (the "Materials"), to

 * deal in the Materials without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Materials, and to permit persons to whom the Materials are

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice(s) and this permission notice shall be included in

 * all copies or substantial portions of the Materials.

 *

 * The Materials are Confidential Information as defined by the Khronos

 * Membership Agreement until designated non-confidential by Khronos, at which

 * point this condition clause shall be removed.

 *

 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 *

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

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 * USE OR OTHER DEALINGS IN THE MATERIALS.

 *

 */

#pragma once

#include <vulkan/vulkan.h>

#include <vulkan/vk_ext_debug_report.h>

// ------------------------------------------------------------------------------------------------

// CreateInstance and CreateDevice support structures

typedef enum VkLayerFunction_ {

    VK_LAYER_FUNCTION_LINK = 0,

    VK_LAYER_FUNCTION_DEVICE = 1,

    VK_LAYER_FUNCTION_INSTANCE = 2

} VkLayerFunction;

/*

 * When creating the device chain the loader needs to pass

 * down information about it's device structure needed at

 * the end of the chain. Passing the data via the

 * VkLayerInstanceInfo avoids issues with finding the

 * exact instance being used.

 */

typedef struct VkLayerInstanceInfo_ {

    void* instance_info;

    PFN_vkGetInstanceProcAddr pfnNextGetInstanceProcAddr;

} VkLayerInstanceInfo;

typedef struct VkLayerInstanceLink_ {

    struct VkLayerInstanceLink_* pNext;

    PFN_vkGetInstanceProcAddr pfnNextGetInstanceProcAddr;

} VkLayerInstanceLink;

/*

 * When creating the device chain the loader needs to pass

 * down information about it's device structure needed at

 * the end of the chain. Passing the data via the

 * VkLayerDeviceInfo avoids issues with finding the

 * exact instance being used.

 */

typedef struct VkLayerDeviceInfo_ {

    void* device_info;

    PFN_vkGetInstanceProcAddr pfnNextGetInstanceProcAddr;

} VkLayerDeviceInfo;

typedef struct {

    VkStructureType sType;  // VK_STRUCTURE_TYPE_LOADER_INSTANCE_CREATE_INFO

    const void* pNext;

    VkLayerFunction function;

    union {

        VkLayerInstanceLink* pLayerInfo;

        VkLayerInstanceInfo instanceInfo;

    } u;

} VkLayerInstanceCreateInfo;

typedef struct VkLayerDeviceLink_ {

    struct VkLayerDeviceLink_* pNext;

    PFN_vkGetInstanceProcAddr pfnNextGetInstanceProcAddr;

    PFN_vkGetDeviceProcAddr pfnNextGetDeviceProcAddr;

} VkLayerDeviceLink;

typedef struct {

    VkStructureType sType;  // VK_STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO

    const void* pNext;

    VkLayerFunction function;

    union {

        VkLayerDeviceLink* pLayerInfo;

        VkLayerDeviceInfo deviceInfo;

    } u;

} VkLayerDeviceCreateInfo;