/*
 *
 * Copyright (C) 2015 Valve Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS 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 OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Author: Chia-I Wu <olvaffe@gmail.com>
 * Author: Chia-I Wu <olv@lunarg.com>
 * Author: Chris Forbes <chrisf@ijw.co.nz>
 * Author: Courtney Goeltzenleuchter <courtney@LunarG.com>
 * Author: Jon Ashburn <jon@lunarg.com>
 * Author: Tony Barbour <tony@LunarG.com>
 *
 */

#ifndef LOADER_H
#define LOADER_H

#include <vulkan/vulkan.h>
#include <vk_loader_platform.h>

#include <vulkan/vk_lunarg_debug_report.h>

#include <vulkan/vk_layer.h>
#include <vulkan/vk_icd.h>
#include <assert.h>

#if defined(__GNUC__) && __GNUC__ >= 4
#  define LOADER_EXPORT __attribute__((visibility("default")))
#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
#  define LOADER_EXPORT __attribute__((visibility("default")))
#else
#  define LOADER_EXPORT
#endif

#define MAX_STRING_SIZE 1024
#define VK_MAJOR(version) (version >> 22)
#define VK_MINOR(version) ((version >> 12) & 0x3ff)
#define VK_PATCH(version) (version & 0xfff)

enum layer_type {
    VK_LAYER_TYPE_DEVICE_EXPLICIT = 0x1,
    VK_LAYER_TYPE_INSTANCE_EXPLICIT = 0x2,
    VK_LAYER_TYPE_GLOBAL_EXPLICIT = 0x3, // both instance and device layer, bitwise
    VK_LAYER_TYPE_DEVICE_IMPLICIT = 0x4,
    VK_LAYER_TYPE_INSTANCE_IMPLICIT = 0x8,
    VK_LAYER_TYPE_GLOBAL_IMPLICIT = 0xc,   // both instance and device layer, bitwise
};

struct loader_extension_list {
    size_t capacity;
    uint32_t count;
    VkExtensionProperties *list;
};

struct loader_name_value {
    char name[MAX_STRING_SIZE];
    char value[MAX_STRING_SIZE];
};

struct loader_lib_info {
    char lib_name[MAX_STRING_SIZE];
    uint32_t ref_count;
    loader_platform_dl_handle lib_handle;
};

struct loader_layer_functions {
    char str_gipa[MAX_STRING_SIZE];
    char str_gdpa[MAX_STRING_SIZE];
    PFN_vkGetInstanceProcAddr get_instance_proc_addr;
    PFN_vkGetDeviceProcAddr get_device_proc_addr;
};

struct loader_layer_properties {
    VkLayerProperties info;
    enum layer_type type;
    char lib_name[MAX_STRING_SIZE];
    struct loader_layer_functions functions;
    struct loader_extension_list instance_extension_list;
    struct loader_extension_list device_extension_list;
    struct loader_name_value disable_env_var;
    struct loader_name_value enable_env_var;
};

struct loader_layer_list {
    size_t capacity;
    uint32_t count;
    struct loader_layer_properties *list;
};

struct loader_layer_library_list {
    size_t capacity;
    uint32_t count;
    struct loader_lib_info *list;
};

struct loader_dispatch_hash_list {
    size_t capacity;
    uint32_t count;
    uint32_t *index;       // index into the dev_ext dispatch table
};

#define MAX_NUM_DEV_EXTS 250
// loader_dispatch_hash_entry and loader_dev_ext_dispatch_table.DevExt have one to one
// correspondence; one loader_dispatch_hash_entry for one DevExt dispatch entry.
// Also have a one to one correspondence with functions in dev_ext_trampoline.c
struct loader_dispatch_hash_entry {
    char *func_name;
    struct loader_dispatch_hash_list list;   // to handle hashing collisions
};

typedef void (VKAPI_PTR *PFN_vkDevExt)(VkDevice device);
struct loader_dev_ext_dispatch_table {
    PFN_vkDevExt DevExt[MAX_NUM_DEV_EXTS];
};

struct loader_dev_dispatch_table {
    VkLayerDispatchTable core_dispatch;
    struct loader_dev_ext_dispatch_table ext_dispatch;
};

/* per CreateDevice structure */
struct loader_device {
    struct loader_dev_dispatch_table loader_dispatch;
    VkDevice device;       // device object from the icd

    uint32_t  app_extension_count;
    VkExtensionProperties *app_extension_props;

    struct loader_layer_list activated_layer_list;

    struct loader_device *next;
};

/* per ICD structure */
struct loader_icd {
    // pointers to find other structs
    const struct loader_scanned_icds *this_icd_lib;
    const struct loader_instance *this_instance;

    struct loader_device *logical_device_list;
    VkInstance instance;       // instance object from the icd
    PFN_vkGetDeviceProcAddr GetDeviceProcAddr;
    PFN_vkDestroyInstance DestroyInstance;
    PFN_vkEnumeratePhysicalDevices EnumeratePhysicalDevices;
    PFN_vkGetPhysicalDeviceFeatures GetPhysicalDeviceFeatures;
    PFN_vkGetPhysicalDeviceFormatProperties GetPhysicalDeviceFormatProperties;
    PFN_vkGetPhysicalDeviceImageFormatProperties GetPhysicalDeviceImageFormatProperties;
    PFN_vkCreateDevice CreateDevice;
    PFN_vkGetPhysicalDeviceProperties GetPhysicalDeviceProperties;
    PFN_vkGetPhysicalDeviceQueueFamilyProperties GetPhysicalDeviceQueueFamilyProperties;
    PFN_vkGetPhysicalDeviceMemoryProperties GetPhysicalDeviceMemoryProperties;
    PFN_vkEnumerateDeviceExtensionProperties EnumerateDeviceExtensionProperties;
    PFN_vkGetPhysicalDeviceSparseImageFormatProperties GetPhysicalDeviceSparseImageFormatProperties;
    PFN_vkDbgCreateMsgCallback DbgCreateMsgCallback;
    PFN_vkDbgDestroyMsgCallback DbgDestroyMsgCallback;
    PFN_vkGetPhysicalDeviceSurfaceSupportKHR GetPhysicalDeviceSurfaceSupportKHR;
    PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR GetPhysicalDeviceSurfaceCapabilitiesKHR;
    PFN_vkGetPhysicalDeviceSurfaceFormatsKHR GetPhysicalDeviceSurfaceFormatsKHR;
    PFN_vkGetPhysicalDeviceSurfacePresentModesKHR GetPhysicalDeviceSurfacePresentModesKHR;
#ifdef VK_USE_PLATFORM_WIN32_KHR
    PFN_vkGetPhysicalDeviceWin32PresentationSupportKHR GetPhysicalDeviceWin32PresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_MIR_KHR
    PFN_vkGetPhysicalDeviceMirPresentationSupportKHR GetPhysicalDeviceMirPresentvationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
    PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR GetPhysicalDeviceWaylandPresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_XCB_KHR
    PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR GetPhysicalDeviceXcbPresentationSupportKHR;
    PFN_vkCreateXcbSurfaceKHR vkCreateXcbSurfaceKHR;
#endif
#ifdef VK_USE_PLATFORM_XLIB_KHR
    PFN_vkGetPhysicalDeviceXlibPresentationSupportKHR GetPhysicalDeviceXlibPresentationSupportKHR;
#endif

    struct loader_icd *next;
};

/* per ICD library structure */
struct loader_icd_libs {
    size_t capacity;
    uint32_t count;
    struct loader_scanned_icds *list;
};

/* per instance structure */
struct loader_instance {
    VkLayerInstanceDispatchTable *disp; // must be first entry in structure

    uint32_t total_gpu_count;
    struct loader_physical_device *phys_devs;
    uint32_t total_icd_count;
    struct loader_icd *icds;
    struct loader_instance *next;
    struct loader_extension_list ext_list;   // icds and loaders extensions
    struct loader_icd_libs icd_libs;
    struct loader_layer_list instance_layer_list;
    struct loader_layer_list device_layer_list;
    struct loader_dispatch_hash_entry disp_hash[MAX_NUM_DEV_EXTS];

    struct loader_msg_callback_map_entry *icd_msg_callback_map;

    struct loader_layer_list activated_layer_list;

    bool debug_report_enabled;
    VkLayerDbgFunctionNode *DbgFunctionHead;

    VkAllocationCallbacks alloc_callbacks;

    bool wsi_surface_enabled;
#ifdef _WIN32
    bool wsi_win32_surface_enabled;
#else // _WIN32
    bool wsi_mir_surface_enabled;
    bool wsi_wayland_surface_enabled;
    bool wsi_xcb_surface_enabled;
    bool wsi_xlib_surface_enabled;
#endif // _WIN32
};

/* per enumerated PhysicalDevice structure */
struct loader_physical_device {
    VkLayerInstanceDispatchTable *disp; // must be first entry in structure
    struct loader_instance *this_instance;
    struct loader_icd *this_icd;
    VkPhysicalDevice phys_dev;          // object from ICD
    /*
     * Fill in the cache of available device extensions from
     * this physical device. This cache can be used during CreateDevice
     */
    struct loader_extension_list device_extension_cache;
};

struct loader_struct {
    struct loader_instance *instances;

    unsigned int loaded_layer_lib_count;
    size_t loaded_layer_lib_capacity;
    struct loader_lib_info *loaded_layer_lib_list;
    // TODO add ref counting of ICD libraries
    // TODO use this struct loader_layer_library_list scanned_layer_libraries;
    // TODO add list of icd libraries for ref counting them for closure
};

struct loader_scanned_icds {
    char *lib_name;
    loader_platform_dl_handle handle;
    uint32_t api_version;
    PFN_vkGetInstanceProcAddr GetInstanceProcAddr;
    PFN_vkCreateInstance CreateInstance;
    PFN_vkEnumerateInstanceExtensionProperties EnumerateInstanceExtensionProperties;
};

static inline struct loader_instance *loader_instance(VkInstance instance) {
    return (struct loader_instance *) instance;
}

static inline void loader_set_dispatch(void* obj, const void *data)
{
    *((const void **) obj) = data;
}

static inline VkLayerDispatchTable *loader_get_dispatch(const void* obj)
{
    return *((VkLayerDispatchTable **) obj);
}

static inline struct loader_dev_dispatch_table *loader_get_dev_dispatch(const void* obj)
{
    return *((struct loader_dev_dispatch_table **) obj);
}

static inline VkLayerInstanceDispatchTable *loader_get_instance_dispatch(const void* obj)
{
    return *((VkLayerInstanceDispatchTable **) obj);
}

static inline void loader_init_dispatch(void* obj, const void *data)
{
#ifdef DEBUG
    assert(valid_loader_magic_value(obj) &&
            "Incompatible ICD, first dword must be initialized to ICD_LOADER_MAGIC. See loader/README.md for details.");
#endif

    loader_set_dispatch(obj, data);
}

/* global variables used across files */
extern struct loader_struct loader;
extern THREAD_LOCAL_DECL struct loader_instance *tls_instance;
extern LOADER_PLATFORM_THREAD_ONCE_DEFINITION(once_init);
extern loader_platform_thread_mutex loader_lock;
extern loader_platform_thread_mutex loader_json_lock;
extern const VkLayerInstanceDispatchTable instance_disp;

struct loader_msg_callback_map_entry {
    VkDbgMsgCallback icd_obj;
    VkDbgMsgCallback loader_obj;
};

bool compare_vk_extension_properties(
        const VkExtensionProperties*            op1,
        const VkExtensionProperties*            op2);

VkResult loader_validate_layers(
        const uint32_t layer_count,
        const char * const *ppEnabledLayerNames,
        const struct loader_layer_list *list);

VkResult loader_validate_instance_extensions(
        const struct loader_extension_list *icd_exts,
        const struct loader_layer_list *instance_layer,
        const VkInstanceCreateInfo*             pCreateInfo);

/* instance layer chain termination entrypoint definitions */
VKAPI_ATTR VkResult VKAPI_CALL loader_CreateInstance(
        const VkInstanceCreateInfo*             pCreateInfo,
        const VkAllocationCallbacks*                 pAllocator,
        VkInstance*                             pInstance);

VKAPI_ATTR void VKAPI_CALL loader_DestroyInstance(
        VkInstance                              instance,
        const VkAllocationCallbacks*                 pAllocator);

VKAPI_ATTR VkResult VKAPI_CALL loader_EnumeratePhysicalDevices(
        VkInstance                              instance,
        uint32_t*                               pPhysicalDeviceCount,
        VkPhysicalDevice*                       pPhysicalDevices);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceFeatures(
        VkPhysicalDevice                        physicalDevice,
        VkPhysicalDeviceFeatures*               pFeatures);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceFormatProperties(
        VkPhysicalDevice                        physicalDevice,
        VkFormat                                format,
        VkFormatProperties*                     pFormatInfo);

VKAPI_ATTR VkResult VKAPI_CALL loader_GetPhysicalDeviceImageFormatProperties(
        VkPhysicalDevice                        physicalDevice,
        VkFormat                                format,
        VkImageType                             type,
        VkImageTiling                           tiling,
        VkImageUsageFlags                       usage,
        VkImageCreateFlags                      flags,
        VkImageFormatProperties*                pImageFormatProperties);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceSparseImageFormatProperties(
        VkPhysicalDevice                        physicalDevice,
        VkFormat                                format,
        VkImageType                             type,
        VkSampleCountFlagBits                   samples,
        VkImageUsageFlags                       usage,
        VkImageTiling                           tiling,
        uint32_t*                               pNumProperties,
        VkSparseImageFormatProperties*          pProperties);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceProperties (
        VkPhysicalDevice physicalDevice,
        VkPhysicalDeviceProperties* pProperties);

VKAPI_ATTR VkResult VKAPI_CALL loader_EnumerateDeviceExtensionProperties (VkPhysicalDevice physicalDevice,
        const char *pLayerName, uint32_t *pCount,
        VkExtensionProperties* pProperties);

VKAPI_ATTR VkResult VKAPI_CALL loader_EnumerateDeviceLayerProperties (VkPhysicalDevice physicalDevice,
        uint32_t *pCount,
        VkLayerProperties* pProperties);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceQueueFamilyProperties (
        VkPhysicalDevice                        physicalDevice,
        uint32_t*                               pCount,
        VkQueueFamilyProperties*                pProperties);

VKAPI_ATTR void VKAPI_CALL loader_GetPhysicalDeviceMemoryProperties (
        VkPhysicalDevice physicalDevice,
        VkPhysicalDeviceMemoryProperties * pProperties);

VKAPI_ATTR VkResult VKAPI_CALL loader_CreateDevice(
        VkPhysicalDevice                        gpu,
        const VkDeviceCreateInfo*               pCreateInfo,
        const VkAllocationCallbacks*                 pAllocator,
        VkDevice*                               pDevice);

/* helper function definitions */
void loader_initialize(void);
bool has_vk_extension_property_array(
        const VkExtensionProperties *vk_ext_prop,
        const uint32_t count,
        const VkExtensionProperties *ext_array);
bool has_vk_extension_property(
        const VkExtensionProperties *vk_ext_prop,
        const struct loader_extension_list *ext_list);

VkResult loader_add_to_ext_list(
        const struct loader_instance *inst,
        struct loader_extension_list *ext_list,
        uint32_t prop_list_count,
        const VkExtensionProperties *props);
void loader_destroy_ext_list(
        const struct loader_instance *inst,
        struct loader_extension_list *ext_info);
void loader_delete_layer_properties(
        const struct loader_instance *inst,
        struct loader_layer_list *layer_list);
void loader_add_to_layer_list(
        const struct loader_instance *inst,
        struct loader_layer_list *list,
        uint32_t prop_list_count,
        const struct loader_layer_properties *props);
void loader_scanned_icd_clear(
        const struct loader_instance *inst,
        struct loader_icd_libs *icd_libs);
void loader_icd_scan(
        const struct loader_instance *inst,
        struct loader_icd_libs *icds);
void loader_layer_scan(
        const struct loader_instance *inst,
        struct loader_layer_list *instance_layers,
        struct loader_layer_list *device_layers);
void loader_get_icd_loader_instance_extensions(
        const struct loader_instance *inst,
        struct loader_icd_libs *icd_libs,
        struct loader_extension_list *inst_exts);
struct loader_icd *loader_get_icd_and_device(
        const VkDevice device,
        struct loader_device **found_dev);
void *loader_dev_ext_gpa(
        struct loader_instance *inst,
        const char *funcName);
void *loader_get_dev_ext_trampoline(
        uint32_t index);
struct loader_instance *loader_get_instance(
        const VkInstance instance);
void loader_remove_logical_device(
        const struct loader_instance *inst,
        struct loader_icd *icd,
        struct loader_device *found_dev);
VkResult loader_enable_instance_layers(
        struct loader_instance *inst,
        const VkInstanceCreateInfo *pCreateInfo,
        const struct loader_layer_list *instance_layers);
void loader_deactivate_instance_layers(struct loader_instance *instance);
uint32_t loader_activate_instance_layers(struct loader_instance *inst);
void loader_activate_instance_layer_extensions(struct loader_instance *inst);

void* loader_heap_alloc(
        const struct loader_instance *instance,
        size_t                       size,
        VkSystemAllocationScope           allocationScope);

void loader_heap_free(
        const struct loader_instance *instance,
        void                         *pMemory);

void *loader_tls_heap_alloc(size_t size);

void loader_tls_heap_free(void *pMemory);
#endif /* LOADER_H */