#pragma once

#include "Defines.h"
#include "Logging.h"
#include "vulkan/vulkan.h"

#if GP_PLATFORM_WINDOWS
#   define VK_USE_PLATFORM_WIN32_KHR
#elif GP_PLATFORM_LINUX
#   define VK_USE_PLATFORM_XLIB_KHR
#elif GP_PLATFORM_MACOS
#   define VK_USE_PLATFORM_MACOS_MVK
#elif GP_PLATFORM_IOS
#   define VK_USE_PLATFORM_IOS_MVK
#elif GP_PLATFORM_ANDROID
#   define VK_USE_PLATFORM_ANDROID_KHR
#else
#   error Unsupported renderer platform
#endif

namespace gameplay
{
const std::vector<const char*> vulkan_validation_layers = { "VK_LAYER_LUNARG_standard_validation" };

std::string to_vulkan_error_string(VkResult result);

static void check_vulkan_result(VkResult res)
{
    if (res != VK_SUCCESS)
    {
        GP_LOG_ERROR("Fatal: VkResult is: %s, file: %s, line: %s", to_vulkan_error_string(res),  __FILE__, __LINE__);
        GP_ASSERT(res == VK_SUCCESS);
        if (res < 0)
            abort();
    }
}

#define VK_CHECK_RESULT(f)                                                                                            \
{                                                                                                                     \
    VkResult res = (f);                                                                                               \
    if (res != VK_SUCCESS)                                                                                            \
    {                                                                                                                 \
        GP_LOG_ERROR("Fatal: VkResult is: %s, file: %s, line: %s", to_vulkan_error_string(res),  __FILE__, __LINE__); \
        GP_ASSERT(res == VK_SUCCESS);                                                                                 \
        if (res < 0)                                                                                                  \
            abort();                                                                                                  \
    }                                                                                                                 \
}

VkBool32 log_vulkan_validation_debug_report(VkDebugReportFlagsEXT flags, 
                                            VkDebugReportObjectTypeEXT objType,
                                            uint64_t srcObject, 
                                            size_t location, 
                                            int32_t msgCode,
                                            const char* layerPrefix, 
                                            const char* msg,
                                            void* userPtr)
{
    std::string prefix("");
    if (flags & VK_DEBUG_REPORT_ERROR_BIT_EXT)
        prefix += "ERROR:";
    if (flags & VK_DEBUG_REPORT_WARNING_BIT_EXT)
        prefix += "WARNING:";
    if (flags & VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT)
        prefix += "PERFORMANCE:";
    if (flags & VK_DEBUG_REPORT_INFORMATION_BIT_EXT)
        prefix += "INFO:";
    if (flags & VK_DEBUG_REPORT_DEBUG_BIT_EXT)
        prefix += "DEBUG:";
    GP_LOG_DEBUG("%s [%s] Code: %d:%s", prefix.c_str(), layerPrefix, msgCode, msg);
    return VK_FALSE;
}

#if GP_PLATFORM_ANDROID

#include <android/log.h>
#include <dlfcn.h>

PFN_vkCreateInstance vkCreateInstance;
PFN_vkGetDeviceProcAddr vkGetDeviceProcAddr;
PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr;
PFN_vkCreateDevice vkCreateDevice;
PFN_vkEnumeratePhysicalDevices vkEnumeratePhysicalDevices;
PFN_vkGetPhysicalDeviceProperties vkGetPhysicalDeviceProperties;
PFN_vkEnumerateDeviceExtensionProperties vkEnumerateDeviceExtensionProperties;
PFN_vkEnumerateDeviceLayerProperties vkEnumerateDeviceLayerProperties;
PFN_vkGetPhysicalDeviceFormatProperties vkGetPhysicalDeviceFormatProperties;
PFN_vkGetPhysicalDeviceFeatures vkGetPhysicalDeviceFeatures;
PFN_vkGetPhysicalDeviceQueueFamilyProperties vkGetPhysicalDeviceQueueFamilyProperties;
PFN_vkGetPhysicalDeviceMemoryProperties vkGetPhysicalDeviceMemoryProperties;
PFN_vkEnumerateInstanceExtensionProperties vkEnumerateInstanceExtensionProperties;
PFN_vkEnumerateInstanceLayerProperties vkEnumerateInstanceLayerProperties;
PFN_vkCmdPipelineBarrier vkCmdPipelineBarrier;
PFN_vkCreateShaderModule vkCreateShaderModule;
PFN_vkCreateBuffer vkCreateBuffer;
PFN_vkGetBufferMemoryRequirements vkGetBufferMemoryRequirements;
PFN_vkMapMemory vkMapMemory;
PFN_vkUnmapMemory vkUnmapMemory;
PFN_vkFlushMappedMemoryRanges vkFlushMappedMemoryRanges;
PFN_vkInvalidateMappedMemoryRanges vkInvalidateMappedMemoryRanges;
PFN_vkBindBufferMemory vkBindBufferMemory;
PFN_vkDestroyBuffer vkDestroyBuffer;
PFN_vkAllocateMemory vkAllocateMemory;
PFN_vkBindImageMemory vkBindImageMemory;
PFN_vkGetImageSubresourceLayout vkGetImageSubresourceLayout;
PFN_vkCmdCopyBuffer vkCmdCopyBuffer;
PFN_vkCmdCopyBufferToImage vkCmdCopyBufferToImage;
PFN_vkCmdCopyImage vkCmdCopyImage;
PFN_vkCmdBlitImage vkCmdBlitImage;
PFN_vkCmdClearAttachments vkCmdClearAttachments;
PFN_vkCreateSampler vkCreateSampler;
PFN_vkDestroySampler vkDestroySampler;
PFN_vkDestroyImage vkDestroyImage;
PFN_vkFreeMemory vkFreeMemory;
PFN_vkCreateRenderPass vkCreateRenderPass;
PFN_vkCmdBeginRenderPass vkCmdBeginRenderPass;
PFN_vkCmdEndRenderPass vkCmdEndRenderPass;
PFN_vkCmdExecuteCommands vkCmdExecuteCommands;
PFN_vkCreateImage vkCreateImage;
PFN_vkGetImageMemoryRequirements vkGetImageMemoryRequirements;
PFN_vkCreateImageView vkCreateImageView;
PFN_vkDestroyImageView vkDestroyImageView;
PFN_vkCreateSemaphore vkCreateSemaphore;
PFN_vkDestroySemaphore vkDestroySemaphore;
PFN_vkCreateFence vkCreateFence;
PFN_vkDestroyFence vkDestroyFence;
PFN_vkWaitForFences vkWaitForFences;
PFN_vkResetFences vkResetFences;
PFN_vkCreateCommandPool vkCreateCommandPool;
PFN_vkDestroyCommandPool vkDestroyCommandPool;
PFN_vkAllocateCommandBuffers vkAllocateCommandBuffers;
PFN_vkBeginCommandBuffer vkBeginCommandBuffer;
PFN_vkEndCommandBuffer vkEndCommandBuffer;
PFN_vkGetDeviceQueue vkGetDeviceQueue;
PFN_vkQueueSubmit vkQueueSubmit;
PFN_vkQueueWaitIdle vkQueueWaitIdle;
PFN_vkDeviceWaitIdle vkDeviceWaitIdle;
PFN_vkCreateFramebuffer vkCreateFramebuffer;
PFN_vkCreatePipelineCache vkCreatePipelineCache;
PFN_vkCreatePipelineLayout vkCreatePipelineLayout;
PFN_vkCreateGraphicsPipelines vkCreateGraphicsPipelines;
PFN_vkCreateComputePipelines vkCreateComputePipelines;
PFN_vkCreateDescriptorPool vkCreateDescriptorPool;
PFN_vkCreateDescriptorSetLayout vkCreateDescriptorSetLayout;
PFN_vkAllocateDescriptorSets vkAllocateDescriptorSets;
PFN_vkUpdateDescriptorSets vkUpdateDescriptorSets;
PFN_vkCmdBindDescriptorSets vkCmdBindDescriptorSets;
PFN_vkCmdBindPipeline vkCmdBindPipeline;
PFN_vkCmdBindVertexBuffers vkCmdBindVertexBuffers;
PFN_vkCmdBindIndexBuffer vkCmdBindIndexBuffer;
PFN_vkCmdSetViewport vkCmdSetViewport;
PFN_vkCmdSetScissor vkCmdSetScissor;
PFN_vkCmdSetLineWidth vkCmdSetLineWidth;
PFN_vkCmdSetDepthBias vkCmdSetDepthBias;
PFN_vkCmdPushConstants vkCmdPushConstants;
PFN_vkCmdDrawIndexed vkCmdDrawIndexed;
PFN_vkCmdDraw vkCmdDraw;
PFN_vkCmdDrawIndexedIndirect vkCmdDrawIndexedIndirect;
PFN_vkCmdDrawIndirect vkCmdDrawIndirect;
PFN_vkCmdDispatch vkCmdDispatch;
PFN_vkDestroyPipeline vkDestroyPipeline;
PFN_vkDestroyPipelineLayout vkDestroyPipelineLayout;
PFN_vkDestroyDescriptorSetLayout vkDestroyDescriptorSetLayout;
PFN_vkDestroyDevice vkDestroyDevice;
PFN_vkDestroyInstance vkDestroyInstance;
PFN_vkDestroyDescriptorPool vkDestroyDescriptorPool;
PFN_vkFreeCommandBuffers vkFreeCommandBuffers;
PFN_vkDestroyRenderPass vkDestroyRenderPass;
PFN_vkDestroyFramebuffer vkDestroyFramebuffer;
PFN_vkDestroyShaderModule vkDestroyShaderModule;
PFN_vkDestroyPipelineCache vkDestroyPipelineCache;
PFN_vkCreateQueryPool vkCreateQueryPool;
PFN_vkDestroyQueryPool vkDestroyQueryPool;
PFN_vkGetQueryPoolResults vkGetQueryPoolResults;
PFN_vkCmdBeginQuery vkCmdBeginQuery;
PFN_vkCmdEndQuery vkCmdEndQuery;
PFN_vkCmdResetQueryPool vkCmdResetQueryPool;
PFN_vkCmdCopyQueryPoolResults vkCmdCopyQueryPoolResults;
PFN_vkCreateAndroidSurfaceKHR vkCreateAndroidSurfaceKHR;
PFN_vkDestroySurfaceKHR vkDestroySurfaceKHR;
void* libVulkan;
#endif


static void load_vulkan_library()
{
#if GP_PLATFORM_ANDROID
    __android_log_print(ANDROID_LOG_INFO, "vulkanandroid", "Loading libvulkan.so...\n");

    // Load the vulkan library
    libVulkan = dlopen("libvulkan.so", RTLD_NOW | RTLD_LOCAL);
    if (!libVulkan)
    {
        __android_log_print(ANDROID_LOG_INFO, "vulkanandroid", "Could not load vulkan library : %s!\n", dlerror());
        return false;
    }

    // Load base function pointers
    vkEnumerateInstanceExtensionProperties = reinterpret_cast<PFN_vkEnumerateInstanceExtensionProperties>(dlsym(libVulkan, "vkEnumerateInstanceExtensionProperties"));
    vkEnumerateInstanceLayerProperties = reinterpret_cast<PFN_vkEnumerateInstanceLayerProperties>(dlsym(libVulkan, "vkEnumerateInstanceLayerProperties"));
    vkCreateInstance = reinterpret_cast<PFN_vkCreateInstance>(dlsym(libVulkan, "vkCreateInstance"));
    vkGetInstanceProcAddr = reinterpret_cast<PFN_vkGetInstanceProcAddr>(dlsym(libVulkan, "vkGetInstanceProcAddr"));
    vkGetDeviceProcAddr = reinterpret_cast<PFN_vkGetDeviceProcAddr>(dlsym(libVulkan, "vkGetDeviceProcAddr"));
#elif GP_PLATFORM_LINUX
    //initxcbConnection();
#endif
}

static void unload_vulkan_library()
{
#if GP_PLATFORM_ANDROID
    dlclose(libVulkan);
#endif
}

static void load_vulkan_functions()
{
#if GP_PLATFORM_ANDROID
    __android_log_print(ANDROID_LOG_INFO, "vulkanandroid", "Loading instance based function pointers...\n");
    vkEnumeratePhysicalDevices = reinterpret_cast<PFN_vkEnumeratePhysicalDevices>(vkGetInstanceProcAddr(instance, "vkEnumeratePhysicalDevices"));
    vkGetPhysicalDeviceProperties = reinterpret_cast<PFN_vkGetPhysicalDeviceProperties>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceProperties"));
    vkEnumerateDeviceLayerProperties = reinterpret_cast<PFN_vkEnumerateDeviceLayerProperties>(vkGetInstanceProcAddr(instance, "vkEnumerateDeviceLayerProperties"));
    vkEnumerateDeviceExtensionProperties = reinterpret_cast<PFN_vkEnumerateDeviceExtensionProperties>(vkGetInstanceProcAddr(instance, "vkEnumerateDeviceExtensionProperties"));
    vkGetPhysicalDeviceQueueFamilyProperties = reinterpret_cast<PFN_vkGetPhysicalDeviceQueueFamilyProperties>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceQueueFamilyProperties"));
    vkGetPhysicalDeviceFeatures = reinterpret_cast<PFN_vkGetPhysicalDeviceFeatures>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceFeatures"));
    vkCreateDevice = reinterpret_cast<PFN_vkCreateDevice>(vkGetInstanceProcAddr(instance, "vkCreateDevice"));
    vkGetPhysicalDeviceFormatProperties = reinterpret_cast<PFN_vkGetPhysicalDeviceFormatProperties>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceFormatProperties"));
    vkGetPhysicalDeviceMemoryProperties = reinterpret_cast<PFN_vkGetPhysicalDeviceMemoryProperties>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceMemoryProperties"));
    vkCmdPipelineBarrier = reinterpret_cast<PFN_vkCmdPipelineBarrier>(vkGetInstanceProcAddr(instance, "vkCmdPipelineBarrier"));
    vkCreateShaderModule = reinterpret_cast<PFN_vkCreateShaderModule>(vkGetInstanceProcAddr(instance, "vkCreateShaderModule"));
    vkCreateBuffer = reinterpret_cast<PFN_vkCreateBuffer>(vkGetInstanceProcAddr(instance, "vkCreateBuffer"));
    vkGetBufferMemoryRequirements = reinterpret_cast<PFN_vkGetBufferMemoryRequirements>(vkGetInstanceProcAddr(instance, "vkGetBufferMemoryRequirements"));
    vkMapMemory = reinterpret_cast<PFN_vkMapMemory>(vkGetInstanceProcAddr(instance, "vkMapMemory"));
    vkUnmapMemory = reinterpret_cast<PFN_vkUnmapMemory>(vkGetInstanceProcAddr(instance, "vkUnmapMemory"));
    vkFlushMappedMemoryRanges = reinterpret_cast<PFN_vkFlushMappedMemoryRanges>(vkGetInstanceProcAddr(instance, "vkFlushMappedMemoryRanges"));
    vkInvalidateMappedMemoryRanges = reinterpret_cast<PFN_vkInvalidateMappedMemoryRanges>(vkGetInstanceProcAddr(instance, "vkInvalidateMappedMemoryRanges"));
    vkBindBufferMemory = reinterpret_cast<PFN_vkBindBufferMemory>(vkGetInstanceProcAddr(instance, "vkBindBufferMemory"));
    vkDestroyBuffer = reinterpret_cast<PFN_vkDestroyBuffer>(vkGetInstanceProcAddr(instance, "vkDestroyBuffer"));
    vkAllocateMemory = reinterpret_cast<PFN_vkAllocateMemory>(vkGetInstanceProcAddr(instance, "vkAllocateMemory"));
    vkFreeMemory = reinterpret_cast<PFN_vkFreeMemory>(vkGetInstanceProcAddr(instance, "vkFreeMemory"));
    vkCreateRenderPass = reinterpret_cast<PFN_vkCreateRenderPass>(vkGetInstanceProcAddr(instance, "vkCreateRenderPass"));
    vkCmdBeginRenderPass = reinterpret_cast<PFN_vkCmdBeginRenderPass>(vkGetInstanceProcAddr(instance, "vkCmdBeginRenderPass"));
    vkCmdEndRenderPass = reinterpret_cast<PFN_vkCmdEndRenderPass>(vkGetInstanceProcAddr(instance, "vkCmdEndRenderPass"));
    vkCmdExecuteCommands = reinterpret_cast<PFN_vkCmdExecuteCommands>(vkGetInstanceProcAddr(instance, "vkCmdExecuteCommands"));
    vkCreateImage = reinterpret_cast<PFN_vkCreateImage>(vkGetInstanceProcAddr(instance, "vkCreateImage"));
    vkGetImageMemoryRequirements = reinterpret_cast<PFN_vkGetImageMemoryRequirements>(vkGetInstanceProcAddr(instance, "vkGetImageMemoryRequirements"));
    vkCreateImageView = reinterpret_cast<PFN_vkCreateImageView>(vkGetInstanceProcAddr(instance, "vkCreateImageView"));
    vkDestroyImageView = reinterpret_cast<PFN_vkDestroyImageView>(vkGetInstanceProcAddr(instance, "vkDestroyImageView"));
    vkBindImageMemory = reinterpret_cast<PFN_vkBindImageMemory>(vkGetInstanceProcAddr(instance, "vkBindImageMemory"));
    vkGetImageSubresourceLayout = reinterpret_cast<PFN_vkGetImageSubresourceLayout>(vkGetInstanceProcAddr(instance, "vkGetImageSubresourceLayout"));
    vkCmdCopyImage = reinterpret_cast<PFN_vkCmdCopyImage>(vkGetInstanceProcAddr(instance, "vkCmdCopyImage"));
    vkCmdBlitImage = reinterpret_cast<PFN_vkCmdBlitImage>(vkGetInstanceProcAddr(instance, "vkCmdBlitImage"));
    vkDestroyImage = reinterpret_cast<PFN_vkDestroyImage>(vkGetInstanceProcAddr(instance, "vkDestroyImage"));
    vkCmdClearAttachments = reinterpret_cast<PFN_vkCmdClearAttachments>(vkGetInstanceProcAddr(instance, "vkCmdClearAttachments"));
    vkCmdCopyBuffer = reinterpret_cast<PFN_vkCmdCopyBuffer>(vkGetInstanceProcAddr(instance, "vkCmdCopyBuffer"));
    vkCmdCopyBufferToImage = reinterpret_cast<PFN_vkCmdCopyBufferToImage>(vkGetInstanceProcAddr(instance, "vkCmdCopyBufferToImage"));
    vkCreateSampler = reinterpret_cast<PFN_vkCreateSampler>(vkGetInstanceProcAddr(instance, "vkCreateSampler"));
    vkDestroySampler = reinterpret_cast<PFN_vkDestroySampler>(vkGetInstanceProcAddr(instance, "vkDestroySampler"));;
    vkCreateSemaphore = reinterpret_cast<PFN_vkCreateSemaphore>(vkGetInstanceProcAddr(instance, "vkCreateSemaphore"));
    vkDestroySemaphore = reinterpret_cast<PFN_vkDestroySemaphore>(vkGetInstanceProcAddr(instance, "vkDestroySemaphore"));
    vkCreateFence = reinterpret_cast<PFN_vkCreateFence>(vkGetInstanceProcAddr(instance, "vkCreateFence"));
    vkDestroyFence = reinterpret_cast<PFN_vkDestroyFence>(vkGetInstanceProcAddr(instance, "vkDestroyFence"));
    vkWaitForFences = reinterpret_cast<PFN_vkWaitForFences>(vkGetInstanceProcAddr(instance, "vkWaitForFences"));
    vkResetFences = reinterpret_cast<PFN_vkResetFences>(vkGetInstanceProcAddr(instance, "vkResetFences"));;
    vkCreateCommandPool = reinterpret_cast<PFN_vkCreateCommandPool>(vkGetInstanceProcAddr(instance, "vkCreateCommandPool"));
    vkDestroyCommandPool = reinterpret_cast<PFN_vkDestroyCommandPool>(vkGetInstanceProcAddr(instance, "vkDestroyCommandPool"));;
    vkAllocateCommandBuffers = reinterpret_cast<PFN_vkAllocateCommandBuffers>(vkGetInstanceProcAddr(instance, "vkAllocateCommandBuffers"));
    vkBeginCommandBuffer = reinterpret_cast<PFN_vkBeginCommandBuffer>(vkGetInstanceProcAddr(instance, "vkBeginCommandBuffer"));
    vkEndCommandBuffer = reinterpret_cast<PFN_vkEndCommandBuffer>(vkGetInstanceProcAddr(instance, "vkEndCommandBuffer"));
    vkGetDeviceQueue = reinterpret_cast<PFN_vkGetDeviceQueue>(vkGetInstanceProcAddr(instance, "vkGetDeviceQueue"));
    vkQueueSubmit = reinterpret_cast<PFN_vkQueueSubmit>(vkGetInstanceProcAddr(instance, "vkQueueSubmit"));
    vkQueueWaitIdle = reinterpret_cast<PFN_vkQueueWaitIdle>(vkGetInstanceProcAddr(instance, "vkQueueWaitIdle"));
    vkDeviceWaitIdle = reinterpret_cast<PFN_vkDeviceWaitIdle>(vkGetInstanceProcAddr(instance, "vkDeviceWaitIdle"));
    vkCreateFramebuffer = reinterpret_cast<PFN_vkCreateFramebuffer>(vkGetInstanceProcAddr(instance, "vkCreateFramebuffer"));
    vkCreatePipelineCache = reinterpret_cast<PFN_vkCreatePipelineCache>(vkGetInstanceProcAddr(instance, "vkCreatePipelineCache"));
    vkCreatePipelineLayout = reinterpret_cast<PFN_vkCreatePipelineLayout>(vkGetInstanceProcAddr(instance, "vkCreatePipelineLayout"));
    vkCreateGraphicsPipelines = reinterpret_cast<PFN_vkCreateGraphicsPipelines>(vkGetInstanceProcAddr(instance, "vkCreateGraphicsPipelines"));
    vkCreateComputePipelines = reinterpret_cast<PFN_vkCreateComputePipelines>(vkGetInstanceProcAddr(instance, "vkCreateComputePipelines"));
    vkCreateDescriptorPool = reinterpret_cast<PFN_vkCreateDescriptorPool>(vkGetInstanceProcAddr(instance, "vkCreateDescriptorPool"));
    vkCreateDescriptorSetLayout = reinterpret_cast<PFN_vkCreateDescriptorSetLayout>(vkGetInstanceProcAddr(instance, "vkCreateDescriptorSetLayout"));
    vkAllocateDescriptorSets = reinterpret_cast<PFN_vkAllocateDescriptorSets>(vkGetInstanceProcAddr(instance, "vkAllocateDescriptorSets"));
    vkUpdateDescriptorSets = reinterpret_cast<PFN_vkUpdateDescriptorSets>(vkGetInstanceProcAddr(instance, "vkUpdateDescriptorSets"));
    vkCmdBindDescriptorSets = reinterpret_cast<PFN_vkCmdBindDescriptorSets>(vkGetInstanceProcAddr(instance, "vkCmdBindDescriptorSets"));
    vkCmdBindPipeline = reinterpret_cast<PFN_vkCmdBindPipeline>(vkGetInstanceProcAddr(instance, "vkCmdBindPipeline"));
    vkCmdBindVertexBuffers = reinterpret_cast<PFN_vkCmdBindVertexBuffers>(vkGetInstanceProcAddr(instance, "vkCmdBindVertexBuffers"));
    vkCmdBindIndexBuffer = reinterpret_cast<PFN_vkCmdBindIndexBuffer>(vkGetInstanceProcAddr(instance, "vkCmdBindIndexBuffer"));
    vkCmdSetViewport = reinterpret_cast<PFN_vkCmdSetViewport>(vkGetInstanceProcAddr(instance, "vkCmdSetViewport"));
    vkCmdSetScissor = reinterpret_cast<PFN_vkCmdSetScissor>(vkGetInstanceProcAddr(instance, "vkCmdSetScissor"));
    vkCmdSetLineWidth = reinterpret_cast<PFN_vkCmdSetLineWidth>(vkGetInstanceProcAddr(instance, "vkCmdSetLineWidth"));
    vkCmdSetDepthBias = reinterpret_cast<PFN_vkCmdSetDepthBias>(vkGetInstanceProcAddr(instance, "vkCmdSetDepthBias"));
    vkCmdPushConstants = reinterpret_cast<PFN_vkCmdPushConstants>(vkGetInstanceProcAddr(instance, "vkCmdPushConstants"));;
    vkCmdDrawIndexed = reinterpret_cast<PFN_vkCmdDrawIndexed>(vkGetInstanceProcAddr(instance, "vkCmdDrawIndexed"));
    vkCmdDraw = reinterpret_cast<PFN_vkCmdDraw>(vkGetInstanceProcAddr(instance, "vkCmdDraw"));
    vkCmdDrawIndexedIndirect = reinterpret_cast<PFN_vkCmdDrawIndexedIndirect>(vkGetInstanceProcAddr(instance, "vkCmdDrawIndexedIndirect"));
    vkCmdDrawIndirect = reinterpret_cast<PFN_vkCmdDrawIndirect>(vkGetInstanceProcAddr(instance, "vkCmdDrawIndirect"));
    vkCmdDispatch = reinterpret_cast<PFN_vkCmdDispatch>(vkGetInstanceProcAddr(instance, "vkCmdDispatch"));
    vkDestroyPipeline = reinterpret_cast<PFN_vkDestroyPipeline>(vkGetInstanceProcAddr(instance, "vkDestroyPipeline"));
    vkDestroyPipelineLayout = reinterpret_cast<PFN_vkDestroyPipelineLayout>(vkGetInstanceProcAddr(instance, "vkDestroyPipelineLayout"));;
    vkDestroyDescriptorSetLayout = reinterpret_cast<PFN_vkDestroyDescriptorSetLayout>(vkGetInstanceProcAddr(instance, "vkDestroyDescriptorSetLayout"));
    vkDestroyDevice = reinterpret_cast<PFN_vkDestroyDevice>(vkGetInstanceProcAddr(instance, "vkDestroyDevice"));
    vkDestroyInstance = reinterpret_cast<PFN_vkDestroyInstance>(vkGetInstanceProcAddr(instance, "vkDestroyInstance"));
    vkDestroyDescriptorPool = reinterpret_cast<PFN_vkDestroyDescriptorPool>(vkGetInstanceProcAddr(instance, "vkDestroyDescriptorPool"));
    vkFreeCommandBuffers = reinterpret_cast<PFN_vkFreeCommandBuffers>(vkGetInstanceProcAddr(instance, "vkFreeCommandBuffers"));
    vkDestroyRenderPass = reinterpret_cast<PFN_vkDestroyRenderPass>(vkGetInstanceProcAddr(instance, "vkDestroyRenderPass"));
    vkDestroyFramebuffer = reinterpret_cast<PFN_vkDestroyFramebuffer>(vkGetInstanceProcAddr(instance, "vkDestroyFramebuffer"));
    vkDestroyShaderModule = reinterpret_cast<PFN_vkDestroyShaderModule>(vkGetInstanceProcAddr(instance, "vkDestroyShaderModule"));
    vkDestroyPipelineCache = reinterpret_cast<PFN_vkDestroyPipelineCache>(vkGetInstanceProcAddr(instance, "vkDestroyPipelineCache"));
    vkCreateQueryPool = reinterpret_cast<PFN_vkCreateQueryPool>(vkGetInstanceProcAddr(instance, "vkCreateQueryPool"));
    vkDestroyQueryPool = reinterpret_cast<PFN_vkDestroyQueryPool>(vkGetInstanceProcAddr(instance, "vkDestroyQueryPool"));
    vkGetQueryPoolResults = reinterpret_cast<PFN_vkGetQueryPoolResults>(vkGetInstanceProcAddr(instance, "vkGetQueryPoolResults"));
    vkCmdBeginQuery = reinterpret_cast<PFN_vkCmdBeginQuery>(vkGetInstanceProcAddr(instance, "vkCmdBeginQuery"));
    vkCmdEndQuery = reinterpret_cast<PFN_vkCmdEndQuery>(vkGetInstanceProcAddr(instance, "vkCmdEndQuery"));
    vkCmdResetQueryPool = reinterpret_cast<PFN_vkCmdResetQueryPool>(vkGetInstanceProcAddr(instance, "vkCmdResetQueryPool"));
    vkCmdCopyQueryPoolResults = reinterpret_cast<PFN_vkCmdCopyQueryPoolResults>(vkGetInstanceProcAddr(instance, "vkCmdCopyQueryPoolResults"));
    vkCreateAndroidSurfaceKHR = reinterpret_cast<PFN_vkCreateAndroidSurfaceKHR>(vkGetInstanceProcAddr(instance, "vkCreateAndroidSurfaceKHR"));
    vkDestroySurfaceKHR = reinterpret_cast<PFN_vkDestroySurfaceKHR>(vkGetInstanceProcAddr(instance, "vkDestroySurfaceKHR"));
#endif
}

PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT;
PFN_vkDestroyDebugReportCallbackEXT vkDestroyDebugReportCallbackEXT;
PFN_vkDebugReportMessageEXT vkDebugReportMessageEXT;
PFN_vkGetPhysicalDeviceSurfaceSupportKHR vkGetPhysicalDeviceSurfaceSupportKHR;
PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR vkGetPhysicalDeviceSurfaceCapabilitiesKHR;
PFN_vkGetPhysicalDeviceSurfaceFormatsKHR vkGetPhysicalDeviceSurfaceFormatsKHR;
PFN_vkGetPhysicalDeviceSurfacePresentModesKHR vkGetPhysicalDeviceSurfacePresentModesKHR;
PFN_vkCreateSwapchainKHR vkCreateSwapchainKHR;
PFN_vkDestroySwapchainKHR vkDestroySwapchainKHR;
PFN_vkGetSwapchainImagesKHR vkGetSwapchainImagesKHR;
PFN_vkAcquireNextImageKHR vkAcquireNextImageKHR;
PFN_vkQueuePresentKHR vkQueuePresentKHR;


std::string to_vulkan_error_string(VkResult result)
{
    switch (result)
    {
#define STR(r) case VK_ ##r: return #r
        STR(NOT_READY);
        STR(TIMEOUT);
        STR(EVENT_SET);
        STR(EVENT_RESET);
        STR(INCOMPLETE);
        STR(ERROR_OUT_OF_HOST_MEMORY);
        STR(ERROR_OUT_OF_DEVICE_MEMORY);
        STR(ERROR_INITIALIZATION_FAILED);
        STR(ERROR_DEVICE_LOST);
        STR(ERROR_MEMORY_MAP_FAILED);
        STR(ERROR_LAYER_NOT_PRESENT);
        STR(ERROR_EXTENSION_NOT_PRESENT);
        STR(ERROR_FEATURE_NOT_PRESENT);
        STR(ERROR_INCOMPATIBLE_DRIVER);
        STR(ERROR_TOO_MANY_OBJECTS);
        STR(ERROR_FORMAT_NOT_SUPPORTED);
        STR(ERROR_SURFACE_LOST_KHR);
        STR(ERROR_NATIVE_WINDOW_IN_USE_KHR);
        STR(SUBOPTIMAL_KHR);
        STR(ERROR_OUT_OF_DATE_KHR);
        STR(ERROR_INCOMPATIBLE_DISPLAY_KHR);
        STR(ERROR_VALIDATION_FAILED_EXT);
        STR(ERROR_INVALID_SHADER_NV);
#undef STR
    default:
        return "UNKNOWN_ERROR";
    }
}

}