/*
 *
 * 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: Cody Northrop <cody@lunarg.com>
 * Author: Jon Ashburn <jon@lunarg.com>
 * Author: Tony Barbour <tony@LunarG.com>
 */

#include <vulkan/vulkan.h>
#include <vulkan/vk_layer.h>
#include <string.h>
#include "loader.h"
#include "vk_loader_platform.h"

static VkResult vkDevExtError(VkDevice dev)
{
    return VK_ERROR_INITIALIZATION_FAILED;
}

static inline void loader_init_device_dispatch_table(struct loader_dev_dispatch_table *dev_table,
                                                    PFN_vkGetDeviceProcAddr gpa,
                                                    VkDevice dev_next,
                                                    VkDevice dev)
{
    VkLayerDispatchTable *table = &dev_table->core_dispatch;
    for (uint32_t i = 0; i < MAX_NUM_DEV_EXTS; i++)
        dev_table->ext_dispatch.DevExt[i] = (PFN_vkDevExt) vkDevExtError;
    // If layer is next, this will trigger layers to initialize their dispatch tables
    //then use the gpa in their dispatch for subsequent layers in the chain
    table->GetDeviceProcAddr = (PFN_vkGetDeviceProcAddr) gpa(dev_next, "vkGetDeviceProcAddr");

    table->CreateDevice = (PFN_vkCreateDevice) gpa(dev, "vkCreateDevice");
    table->DestroyDevice = (PFN_vkDestroyDevice) gpa(dev, "vkDestroyDevice");
    table->GetDeviceQueue = (PFN_vkGetDeviceQueue) gpa(dev, "vkGetDeviceQueue");
    table->QueueSubmit = (PFN_vkQueueSubmit) gpa(dev, "vkQueueSubmit");
    table->QueueWaitIdle = (PFN_vkQueueWaitIdle) gpa(dev, "vkQueueWaitIdle");
    table->DeviceWaitIdle = (PFN_vkDeviceWaitIdle) gpa(dev, "vkDeviceWaitIdle");
    table->AllocateMemory = (PFN_vkAllocateMemory) gpa(dev, "vkAllocateMemory");
    table->FreeMemory = (PFN_vkFreeMemory) gpa(dev, "vkFreeMemory");
    table->MapMemory = (PFN_vkMapMemory) gpa(dev, "vkMapMemory");
    table->UnmapMemory = (PFN_vkUnmapMemory) gpa(dev, "vkUnmapMemory");
    table->FlushMappedMemoryRanges = (PFN_vkFlushMappedMemoryRanges) gpa(dev, "vkFlushMappedMemoryRanges");
    table->InvalidateMappedMemoryRanges = (PFN_vkInvalidateMappedMemoryRanges) gpa(dev, "vkInvalidateMappedMemoryRanges");
    table->GetDeviceMemoryCommitment = (PFN_vkGetDeviceMemoryCommitment) gpa(dev, "vkGetDeviceMemoryCommitment");
    table->GetImageSparseMemoryRequirements = (PFN_vkGetImageSparseMemoryRequirements) gpa(dev, "vkGetImageSparseMemoryRequirements");
    table->GetBufferMemoryRequirements = (PFN_vkGetBufferMemoryRequirements) gpa(dev, "vkGetBufferMemoryRequirements");
    table->GetImageMemoryRequirements = (PFN_vkGetImageMemoryRequirements) gpa(dev, "vkGetImageMemoryRequirements");
    table->BindBufferMemory = (PFN_vkBindBufferMemory) gpa(dev, "vkBindBufferMemory");
    table->BindImageMemory = (PFN_vkBindImageMemory) gpa(dev, "vkBindImageMemory");
    table->QueueBindSparse = (PFN_vkQueueBindSparse) gpa(dev, "vkQueueBindSparse");
    table->CreateFence = (PFN_vkCreateFence) gpa(dev, "vkCreateFence");
    table->DestroyFence = (PFN_vkDestroyFence) gpa(dev, "vkDestroyFence");
    table->ResetFences = (PFN_vkResetFences) gpa(dev, "vkResetFences");
    table->GetFenceStatus = (PFN_vkGetFenceStatus) gpa(dev, "vkGetFenceStatus");
    table->WaitForFences = (PFN_vkWaitForFences) gpa(dev, "vkWaitForFences");
    table->CreateSemaphore = (PFN_vkCreateSemaphore) gpa(dev, "vkCreateSemaphore");
    table->DestroySemaphore = (PFN_vkDestroySemaphore) gpa(dev, "vkDestroySemaphore");
    table->CreateEvent = (PFN_vkCreateEvent) gpa(dev, "vkCreateEvent");
    table->DestroyEvent = (PFN_vkDestroyEvent) gpa(dev, "vkDestroyEvent");
    table->GetEventStatus = (PFN_vkGetEventStatus) gpa(dev, "vkGetEventStatus");
    table->SetEvent = (PFN_vkSetEvent) gpa(dev, "vkSetEvent");
    table->ResetEvent = (PFN_vkResetEvent) gpa(dev, "vkResetEvent");
    table->CreateQueryPool = (PFN_vkCreateQueryPool) gpa(dev, "vkCreateQueryPool");
    table->DestroyQueryPool = (PFN_vkDestroyQueryPool) gpa(dev, "vkDestroyQueryPool");
    table->GetQueryPoolResults = (PFN_vkGetQueryPoolResults) gpa(dev, "vkGetQueryPoolResults");
    table->CreateBuffer = (PFN_vkCreateBuffer) gpa(dev, "vkCreateBuffer");
    table->DestroyBuffer = (PFN_vkDestroyBuffer) gpa(dev, "vkDestroyBuffer");
    table->CreateBufferView = (PFN_vkCreateBufferView) gpa(dev, "vkCreateBufferView");
    table->DestroyBufferView = (PFN_vkDestroyBufferView) gpa(dev, "vkDestroyBufferView");
    table->CreateImage = (PFN_vkCreateImage) gpa(dev, "vkCreateImage");
    table->DestroyImage = (PFN_vkDestroyImage) gpa(dev, "vkDestroyImage");
    table->GetImageSubresourceLayout = (PFN_vkGetImageSubresourceLayout) gpa(dev, "vkGetImageSubresourceLayout");
    table->CreateImageView = (PFN_vkCreateImageView) gpa(dev, "vkCreateImageView");
    table->DestroyImageView = (PFN_vkDestroyImageView) gpa(dev, "vkDestroyImageView");
    table->CreateShaderModule = (PFN_vkCreateShaderModule) gpa(dev, "vkCreateShaderModule");
    table->DestroyShaderModule = (PFN_vkDestroyShaderModule) gpa(dev, "vkDestroyShaderModule");
    table->CreatePipelineCache = (PFN_vkCreatePipelineCache) gpa(dev, "vkCreatePipelineCache");
    table->DestroyPipelineCache = (PFN_vkDestroyPipelineCache) gpa(dev, "vkDestroyPipelineCache");
    table->GetPipelineCacheData = (PFN_vkGetPipelineCacheData) gpa(dev, "vkGetPipelineCacheData");
    table->MergePipelineCaches = (PFN_vkMergePipelineCaches) gpa(dev, "vkMergePipelineCaches");
    table->CreateGraphicsPipelines = (PFN_vkCreateGraphicsPipelines) gpa(dev, "vkCreateGraphicsPipelines");
    table->CreateComputePipelines = (PFN_vkCreateComputePipelines) gpa(dev, "vkCreateComputePipelines");
    table->DestroyPipeline = (PFN_vkDestroyPipeline) gpa(dev, "vkDestroyPipeline");
    table->CreatePipelineLayout = (PFN_vkCreatePipelineLayout) gpa(dev, "vkCreatePipelineLayout");
    table->DestroyPipelineLayout = (PFN_vkDestroyPipelineLayout) gpa(dev, "vkDestroyPipelineLayout");
    table->CreateSampler = (PFN_vkCreateSampler) gpa(dev, "vkCreateSampler");
    table->DestroySampler = (PFN_vkDestroySampler) gpa(dev, "vkDestroySampler");
    table->CreateDescriptorSetLayout = (PFN_vkCreateDescriptorSetLayout) gpa(dev, "vkCreateDescriptorSetLayout");
    table->DestroyDescriptorSetLayout = (PFN_vkDestroyDescriptorSetLayout) gpa(dev, "vkDestroyDescriptorSetLayout");
    table->CreateDescriptorPool = (PFN_vkCreateDescriptorPool) gpa(dev, "vkCreateDescriptorPool");
    table->DestroyDescriptorPool = (PFN_vkDestroyDescriptorPool) gpa(dev, "vkDestroyDescriptorPool");
    table->ResetDescriptorPool = (PFN_vkResetDescriptorPool) gpa(dev, "vkResetDescriptorPool");
    table->AllocateDescriptorSets = (PFN_vkAllocateDescriptorSets) gpa(dev, "vkAllocateDescriptorSets");
    table->FreeDescriptorSets = (PFN_vkFreeDescriptorSets) gpa(dev, "vkFreeDescriptorSets");
    table->UpdateDescriptorSets = (PFN_vkUpdateDescriptorSets) gpa(dev, "vkUpdateDescriptorSets");
    table->CreateFramebuffer = (PFN_vkCreateFramebuffer) gpa(dev, "vkCreateFramebuffer");
    table->DestroyFramebuffer = (PFN_vkDestroyFramebuffer) gpa(dev, "vkDestroyFramebuffer");
    table->CreateRenderPass = (PFN_vkCreateRenderPass) gpa(dev, "vkCreateRenderPass");
    table->DestroyRenderPass = (PFN_vkDestroyRenderPass) gpa(dev, "vkDestroyRenderPass");
    table->GetRenderAreaGranularity = (PFN_vkGetRenderAreaGranularity) gpa(dev, "vkGetRenderAreaGranularity");
    table->CreateCommandPool = (PFN_vkCreateCommandPool) gpa(dev, "vkCreateCommandPool");
    table->DestroyCommandPool = (PFN_vkDestroyCommandPool) gpa(dev, "vkDestroyCommandPool");
    table->ResetCommandPool = (PFN_vkResetCommandPool) gpa(dev, "vkResetCommandPool");
    table->AllocateCommandBuffers = (PFN_vkAllocateCommandBuffers) gpa(dev, "vkAllocateCommandBuffers");
    table->FreeCommandBuffers = (PFN_vkFreeCommandBuffers) gpa(dev, "vkFreeCommandBuffers");
    table->BeginCommandBuffer = (PFN_vkBeginCommandBuffer) gpa(dev, "vkBeginCommandBuffer");
    table->EndCommandBuffer = (PFN_vkEndCommandBuffer) gpa(dev, "vkEndCommandBuffer");
    table->ResetCommandBuffer = (PFN_vkResetCommandBuffer) gpa(dev, "vkResetCommandBuffer");
    table->CmdBindPipeline = (PFN_vkCmdBindPipeline) gpa(dev, "vkCmdBindPipeline");
    table->CmdSetViewport = (PFN_vkCmdSetViewport) gpa(dev, "vkCmdSetViewport");
    table->CmdSetScissor = (PFN_vkCmdSetScissor) gpa(dev, "vkCmdSetScissor");
    table->CmdSetLineWidth = (PFN_vkCmdSetLineWidth) gpa(dev, "vkCmdSetLineWidth");
    table->CmdSetDepthBias = (PFN_vkCmdSetDepthBias) gpa(dev, "vkCmdSetDepthBias");
    table->CmdSetBlendConstants = (PFN_vkCmdSetBlendConstants) gpa(dev, "vkCmdSetBlendConstants");
    table->CmdSetDepthBounds = (PFN_vkCmdSetDepthBounds) gpa(dev, "vkCmdSetDepthBounds");
    table->CmdSetStencilCompareMask = (PFN_vkCmdSetStencilCompareMask) gpa(dev, "vkCmdSetStencilCompareMask");
    table->CmdSetStencilWriteMask = (PFN_vkCmdSetStencilWriteMask) gpa(dev, "vkCmdSetStencilWriteMask");
    table->CmdSetStencilReference = (PFN_vkCmdSetStencilReference) gpa(dev, "vkCmdSetStencilReference");
    table->CmdBindDescriptorSets = (PFN_vkCmdBindDescriptorSets) gpa(dev, "vkCmdBindDescriptorSets");
    table->CmdBindVertexBuffers = (PFN_vkCmdBindVertexBuffers) gpa(dev, "vkCmdBindVertexBuffers");
    table->CmdBindIndexBuffer = (PFN_vkCmdBindIndexBuffer) gpa(dev, "vkCmdBindIndexBuffer");
    table->CmdDraw = (PFN_vkCmdDraw) gpa(dev, "vkCmdDraw");
    table->CmdDrawIndexed = (PFN_vkCmdDrawIndexed) gpa(dev, "vkCmdDrawIndexed");
    table->CmdDrawIndirect = (PFN_vkCmdDrawIndirect) gpa(dev, "vkCmdDrawIndirect");
    table->CmdDrawIndexedIndirect = (PFN_vkCmdDrawIndexedIndirect) gpa(dev, "vkCmdDrawIndexedIndirect");
    table->CmdDispatch = (PFN_vkCmdDispatch) gpa(dev, "vkCmdDispatch");
    table->CmdDispatchIndirect = (PFN_vkCmdDispatchIndirect) gpa(dev, "vkCmdDispatchIndirect");
    table->CmdCopyBuffer = (PFN_vkCmdCopyBuffer) gpa(dev, "vkCmdCopyBuffer");
    table->CmdCopyImage = (PFN_vkCmdCopyImage) gpa(dev, "vkCmdCopyImage");
    table->CmdBlitImage = (PFN_vkCmdBlitImage) gpa(dev, "vkCmdBlitImage");
    table->CmdCopyBufferToImage = (PFN_vkCmdCopyBufferToImage) gpa(dev, "vkCmdCopyBufferToImage");
    table->CmdCopyImageToBuffer = (PFN_vkCmdCopyImageToBuffer) gpa(dev, "vkCmdCopyImageToBuffer");
    table->CmdUpdateBuffer = (PFN_vkCmdUpdateBuffer) gpa(dev, "vkCmdUpdateBuffer");
    table->CmdFillBuffer = (PFN_vkCmdFillBuffer) gpa(dev, "vkCmdFillBuffer");
    table->CmdClearColorImage = (PFN_vkCmdClearColorImage) gpa(dev, "vkCmdClearColorImage");
    table->CmdClearDepthStencilImage = (PFN_vkCmdClearDepthStencilImage) gpa(dev, "vkCmdClearDepthStencilImage");
    table->CmdClearAttachments = (PFN_vkCmdClearAttachments) gpa(dev, "vkCmdClearAttachments");
    table->CmdResolveImage = (PFN_vkCmdResolveImage) gpa(dev, "vkCmdResolveImage");
    table->CmdSetEvent = (PFN_vkCmdSetEvent) gpa(dev, "vkCmdSetEvent");
    table->CmdResetEvent = (PFN_vkCmdResetEvent) gpa(dev, "vkCmdResetEvent");
    table->CmdWaitEvents = (PFN_vkCmdWaitEvents) gpa(dev, "vkCmdWaitEvents");
    table->CmdPipelineBarrier = (PFN_vkCmdPipelineBarrier) gpa(dev, "vkCmdPipelineBarrier");
    table->CmdBeginQuery = (PFN_vkCmdBeginQuery) gpa(dev, "vkCmdBeginQuery");
    table->CmdEndQuery = (PFN_vkCmdEndQuery) gpa(dev, "vkCmdEndQuery");
    table->CmdResetQueryPool = (PFN_vkCmdResetQueryPool) gpa(dev, "vkCmdResetQueryPool");
    table->CmdWriteTimestamp = (PFN_vkCmdWriteTimestamp) gpa(dev, "vkCmdWriteTimestamp");
    table->CmdCopyQueryPoolResults = (PFN_vkCmdCopyQueryPoolResults) gpa(dev, "vkCmdCopyQueryPoolResults");
    table->CmdPushConstants = (PFN_vkCmdPushConstants) gpa(dev, "vkCmdPushConstants");
    table->CmdBeginRenderPass = (PFN_vkCmdBeginRenderPass) gpa(dev, "vkCmdBeginRenderPass");
    table->CmdNextSubpass = (PFN_vkCmdNextSubpass) gpa(dev, "vkCmdNextSubpass");
    table->CmdEndRenderPass = (PFN_vkCmdEndRenderPass) gpa(dev, "vkCmdEndRenderPass");
    table->CmdExecuteCommands = (PFN_vkCmdExecuteCommands) gpa(dev, "vkCmdExecuteCommands");
//TODO move into it's own table
//TODO also consider dropping trampoline code for these device level extensions entirely
// then don't need loader to know about these at all but then not queryable via GIPA
    table->AcquireNextImageKHR = (PFN_vkAcquireNextImageKHR) gpa(dev, "vkAcquireNextImageKHR");
    table->CreateSwapchainKHR = (PFN_vkCreateSwapchainKHR) gpa(dev, "vkCreateSwapchainKHR");
    table->DestroySwapchainKHR = (PFN_vkDestroySwapchainKHR) gpa(dev, "vkDestroySwapchainKHR");
    table->GetSwapchainImagesKHR = (PFN_vkGetSwapchainImagesKHR) gpa(dev, "vkGetSwapchainImagesKHR");
    table->QueuePresentKHR = (PFN_vkQueuePresentKHR) gpa(dev, "vkQueuePresentKHR");
}

static inline void *loader_lookup_device_dispatch_table(
                                            const VkLayerDispatchTable *table,
                                            const char *name)
{
    if (!name || name[0] != 'v' || name[1] != 'k')
        return NULL;

    name += 2;
    if (!strcmp(name, "GetDeviceProcAddr"))
        return (void *) table->GetDeviceProcAddr;
    if (!strcmp(name, "CreateDevice"))
        return (void *) table->CreateDevice;
    if (!strcmp(name, "DestroyDevice"))
        return (void *) table->DestroyDevice;
    if (!strcmp(name, "GetDeviceQueue"))
        return (void *) table->GetDeviceQueue;
    if (!strcmp(name, "QueueSubmit"))
        return (void *) table->QueueSubmit;
    if (!strcmp(name, "QueueWaitIdle"))
        return (void *) table->QueueWaitIdle;
    if (!strcmp(name, "DeviceWaitIdle"))
        return (void *) table->DeviceWaitIdle;
    if (!strcmp(name, "AllocateMemory"))
        return (void *) table->AllocateMemory;
    if (!strcmp(name, "FreeMemory"))
        return (void *) table->FreeMemory;
    if (!strcmp(name, "MapMemory"))
        return (void *) table->MapMemory;
    if (!strcmp(name, "UnmapMemory"))
        return (void *) table->UnmapMemory;
    if (!strcmp(name, "FlushMappedMemoryRanges"))
        return (void *) table->FlushMappedMemoryRanges;
    if (!strcmp(name, "InvalidateMappedMemoryRanges"))
        return (void *) table->InvalidateMappedMemoryRanges;
    if (!strcmp(name, "GetDeviceMemoryCommitment"))
        return (void *) table->GetDeviceMemoryCommitment;
    if (!strcmp(name, "GetImageSparseMemoryRequirements"))
        return (void *) table->GetImageSparseMemoryRequirements;
    if (!strcmp(name, "GetBufferMemoryRequirements"))
        return (void *) table->GetBufferMemoryRequirements;
    if (!strcmp(name, "GetImageMemoryRequirements"))
        return (void *) table->GetImageMemoryRequirements;
    if (!strcmp(name, "BindBufferMemory"))
        return (void *) table->BindBufferMemory;
    if (!strcmp(name, "BindImageMemory"))
        return (void *) table->BindImageMemory;
    if (!strcmp(name, "QueueBindSparse"))
        return (void *) table->QueueBindSparse;
    if (!strcmp(name, "CreateFence"))
        return (void *) table->CreateFence;
    if (!strcmp(name, "DestroyFence"))
        return (void *) table->DestroyFence;
    if (!strcmp(name, "ResetFences"))
        return (void *) table->ResetFences;
    if (!strcmp(name, "GetFenceStatus"))
        return (void *) table->GetFenceStatus;
    if (!strcmp(name, "WaitForFences"))
        return (void *) table->WaitForFences;
    if (!strcmp(name, "CreateSemaphore"))
        return (void *) table->CreateSemaphore;
    if (!strcmp(name, "DestroySemaphore"))
        return (void *) table->DestroySemaphore;
    if (!strcmp(name, "CreateEvent"))
        return (void *) table->CreateEvent;
    if (!strcmp(name, "DestroyEvent"))
        return (void *) table->DestroyEvent;
    if (!strcmp(name, "GetEventStatus"))
        return (void *) table->GetEventStatus;
    if (!strcmp(name, "SetEvent"))
        return (void *) table->SetEvent;
    if (!strcmp(name, "ResetEvent"))
        return (void *) table->ResetEvent;
    if (!strcmp(name, "CreateQueryPool"))
        return (void *) table->CreateQueryPool;
    if (!strcmp(name, "DestroyQueryPool"))
        return (void *) table->DestroyQueryPool;
    if (!strcmp(name, "GetQueryPoolResults"))
        return (void *) table->GetQueryPoolResults;
    if (!strcmp(name, "CreateBuffer"))
        return (void *) table->CreateBuffer;
    if (!strcmp(name, "DestroyBuffer"))
        return (void *) table->DestroyBuffer;
    if (!strcmp(name, "CreateBufferView"))
        return (void *) table->CreateBufferView;
    if (!strcmp(name, "DestroyBufferView"))
        return (void *) table->DestroyBufferView;
    if (!strcmp(name, "CreateImage"))
        return (void *) table->CreateImage;
    if (!strcmp(name, "DestroyImage"))
        return (void *) table->DestroyImage;
    if (!strcmp(name, "GetImageSubresourceLayout"))
        return (void *) table->GetImageSubresourceLayout;
    if (!strcmp(name, "CreateImageView"))
        return (void *) table->CreateImageView;
    if (!strcmp(name, "DestroyImageView"))
        return (void *) table->DestroyImageView;
    if (!strcmp(name, "CreateShaderModule"))
        return (void *) table->CreateShaderModule;
    if (!strcmp(name, "DestroyShaderModule"))
        return (void *) table->DestroyShaderModule;
    if (!strcmp(name, "CreatePipelineCache"))
        return (void*) vkCreatePipelineCache;
    if (!strcmp(name, "DestroyPipelineCache"))
        return (void*) vkDestroyPipelineCache;
    if (!strcmp(name, "GetPipelineCacheData"))
        return (void*) vkGetPipelineCacheData;
    if (!strcmp(name, "MergePipelineCaches"))
        return (void*) vkMergePipelineCaches;
    if (!strcmp(name, "CreateGraphicsPipelines"))
        return (void*) vkCreateGraphicsPipelines;
    if (!strcmp(name, "CreateComputePipelines"))
        return (void*) vkCreateComputePipelines;
    if (!strcmp(name, "DestroyPipeline"))
        return (void *) table->DestroyPipeline;
    if (!strcmp(name, "CreatePipelineLayout"))
        return (void *) table->CreatePipelineLayout;
    if (!strcmp(name, "DestroyPipelineLayout"))
        return (void *) table->DestroyPipelineLayout;
    if (!strcmp(name, "CreateSampler"))
        return (void *) table->CreateSampler;
    if (!strcmp(name, "DestroySampler"))
        return (void *) table->DestroySampler;
    if (!strcmp(name, "CreateDescriptorSetLayout"))
        return (void *) table->CreateDescriptorSetLayout;
    if (!strcmp(name, "DestroyDescriptorSetLayout"))
        return (void *) table->DestroyDescriptorSetLayout;
    if (!strcmp(name, "CreateDescriptorPool"))
        return (void *) table->CreateDescriptorPool;
    if (!strcmp(name, "DestroyDescriptorPool"))
        return (void *) table->DestroyDescriptorPool;
    if (!strcmp(name, "ResetDescriptorPool"))
        return (void *) table->ResetDescriptorPool;
    if (!strcmp(name, "AllocateDescriptorSets"))
        return (void *) table->AllocateDescriptorSets;
    if (!strcmp(name, "FreeDescriptorSets"))
        return (void *) table->FreeDescriptorSets;
    if (!strcmp(name, "UpdateDescriptorSets"))
        return (void *) table->UpdateDescriptorSets;
    if (!strcmp(name, "CreateFramebuffer"))
        return (void *) table->CreateFramebuffer;
    if (!strcmp(name, "DestroyFramebuffer"))
        return (void *) table->DestroyFramebuffer;
    if (!strcmp(name, "CreateRenderPass"))
        return (void *) table->CreateRenderPass;
    if (!strcmp(name, "DestroyRenderPass"))
        return (void *) table->DestroyRenderPass;
    if (!strcmp(name, "GetRenderAreaGranularity"))
        return (void *) table->GetRenderAreaGranularity;
    if (!strcmp(name, "CreateCommandPool"))
        return (void *) table->CreateCommandPool;
    if (!strcmp(name, "DestroyCommandPool"))
        return (void *) table->DestroyCommandPool;
    if (!strcmp(name, "ResetCommandPool"))
        return (void *) table->ResetCommandPool;
    if (!strcmp(name, "AllocateCommandBuffers"))
        return (void *) table->AllocateCommandBuffers;
    if (!strcmp(name, "FreeCommandBuffers"))
        return (void *) table->FreeCommandBuffers;
    if (!strcmp(name, "BeginCommandBuffer"))
        return (void *) table->BeginCommandBuffer;
    if (!strcmp(name, "EndCommandBuffer"))
        return (void *) table->EndCommandBuffer;
    if (!strcmp(name, "ResetCommandBuffer"))
        return (void *) table->ResetCommandBuffer;
    if (!strcmp(name, "CmdBindPipeline"))
        return (void *) table->CmdBindPipeline;
    if (!strcmp(name, "CmdSetViewport"))
        return (void *) table->CmdSetViewport;
    if (!strcmp(name, "CmdSetScissor"))
        return (void *) table->CmdSetScissor;
    if (!strcmp(name, "CmdSetLineWidth"))
        return (void *) table->CmdSetLineWidth;
    if (!strcmp(name, "CmdSetDepthBias"))
        return (void *) table->CmdSetDepthBias;
    if (!strcmp(name, "CmdSetBlendConstants"))
        return (void *) table->CmdSetBlendConstants;
    if (!strcmp(name, "CmdSetDepthBounds"))
        return (void *) table->CmdSetDepthBounds;
    if (!strcmp(name, "CmdSetStencilCompareMask"))
        return (void *) table->CmdSetStencilCompareMask;
    if (!strcmp(name, "CmdSetStencilwriteMask"))
        return (void *) table->CmdSetStencilWriteMask;
    if (!strcmp(name, "CmdSetStencilReference"))
        return (void *) table->CmdSetStencilReference;
    if (!strcmp(name, "CmdBindDescriptorSets"))
        return (void *) table->CmdBindDescriptorSets;
    if (!strcmp(name, "CmdBindVertexBuffers"))
        return (void *) table->CmdBindVertexBuffers;
    if (!strcmp(name, "CmdBindIndexBuffer"))
        return (void *) table->CmdBindIndexBuffer;
    if (!strcmp(name, "CmdDraw"))
        return (void *) table->CmdDraw;
    if (!strcmp(name, "CmdDrawIndexed"))
        return (void *) table->CmdDrawIndexed;
    if (!strcmp(name, "CmdDrawIndirect"))
        return (void *) table->CmdDrawIndirect;
    if (!strcmp(name, "CmdDrawIndexedIndirect"))
        return (void *) table->CmdDrawIndexedIndirect;
    if (!strcmp(name, "CmdDispatch"))
        return (void *) table->CmdDispatch;
    if (!strcmp(name, "CmdDispatchIndirect"))
        return (void *) table->CmdDispatchIndirect;
    if (!strcmp(name, "CmdCopyBuffer"))
        return (void *) table->CmdCopyBuffer;
    if (!strcmp(name, "CmdCopyImage"))
        return (void *) table->CmdCopyImage;
    if (!strcmp(name, "CmdBlitImage"))
        return (void *) table->CmdBlitImage;
    if (!strcmp(name, "CmdCopyBufferToImage"))
        return (void *) table->CmdCopyBufferToImage;
    if (!strcmp(name, "CmdCopyImageToBuffer"))
        return (void *) table->CmdCopyImageToBuffer;
    if (!strcmp(name, "CmdUpdateBuffer"))
        return (void *) table->CmdUpdateBuffer;
    if (!strcmp(name, "CmdFillBuffer"))
        return (void *) table->CmdFillBuffer;
    if (!strcmp(name, "CmdClearColorImage"))
        return (void *) table->CmdClearColorImage;
    if (!strcmp(name, "CmdClearDepthStencilImage"))
        return (void *) table->CmdClearDepthStencilImage;
    if (!strcmp(name, "CmdClearAttachments"))
        return (void *) table->CmdClearAttachments;
    if (!strcmp(name, "CmdResolveImage"))
        return (void *) table->CmdResolveImage;
    if (!strcmp(name, "CmdSetEvent"))
        return (void *) table->CmdSetEvent;
    if (!strcmp(name, "CmdResetEvent"))
        return (void *) table->CmdResetEvent;
    if (!strcmp(name, "CmdWaitEvents"))
        return (void *) table->CmdWaitEvents;
    if (!strcmp(name, "CmdPipelineBarrier"))
        return (void *) table->CmdPipelineBarrier;
    if (!strcmp(name, "CmdBeginQuery"))
        return (void *) table->CmdBeginQuery;
    if (!strcmp(name, "CmdEndQuery"))
        return (void *) table->CmdEndQuery;
    if (!strcmp(name, "CmdResetQueryPool"))
        return (void *) table->CmdResetQueryPool;
    if (!strcmp(name, "CmdWriteTimestamp"))
        return (void *) table->CmdWriteTimestamp;
    if (!strcmp(name, "CmdCopyQueryPoolResults"))
        return (void *) table->CmdCopyQueryPoolResults;
    if (!strcmp(name, "CmdPushConstants"))
        return (void *) table->CmdPushConstants;
    if (!strcmp(name, "CmdBeginRenderPass"))
        return (void *) table->CmdBeginRenderPass;
    if (!strcmp(name, "CmdNextSubpass"))
        return (void *) table->CmdNextSubpass;
    if (!strcmp(name, "CmdEndRenderPass"))
        return (void *) table->CmdEndRenderPass;
    if (!strcmp(name, "CmdExecuteCommands"))
        return (void *) table->CmdExecuteCommands;

    return NULL;
}

static inline void loader_init_instance_core_dispatch_table(VkLayerInstanceDispatchTable *table,
                                                PFN_vkGetInstanceProcAddr gpa,
                                                VkInstance inst_next,
                                                VkInstance inst)
{
    // If layer is next, this will trigger layers to initialize their dispatch tables
    //then use the gpa in their dispatch for subsequent layers in the chain
    table->GetInstanceProcAddr = (PFN_vkGetInstanceProcAddr) gpa(inst_next, "vkGetInstanceProcAddr");

    table->CreateInstance = (PFN_vkCreateInstance) gpa(inst, "vkCreateInstance");
    table->DestroyInstance = (PFN_vkDestroyInstance) gpa(inst, "vkDestroyInstance");
    table->EnumeratePhysicalDevices = (PFN_vkEnumeratePhysicalDevices) gpa(inst, "vkEnumeratePhysicalDevices");
    table->GetPhysicalDeviceFeatures = (PFN_vkGetPhysicalDeviceFeatures) gpa(inst, "vkGetPhysicalDeviceFeatures");
    table->GetPhysicalDeviceImageFormatProperties = (PFN_vkGetPhysicalDeviceImageFormatProperties) gpa(inst, "vkGetPhysicalDeviceImageFormatProperties");
    table->GetPhysicalDeviceFormatProperties = (PFN_vkGetPhysicalDeviceFormatProperties) gpa(inst, "vkGetPhysicalDeviceFormatProperties");
    table->GetPhysicalDeviceSparseImageFormatProperties = (PFN_vkGetPhysicalDeviceSparseImageFormatProperties) gpa(inst, "vkGetPhysicalDeviceSparseImageFormatProperties");
    table->GetPhysicalDeviceProperties = (PFN_vkGetPhysicalDeviceProperties) gpa(inst, "vkGetPhysicalDeviceProperties");
    table->GetPhysicalDeviceQueueFamilyProperties = (PFN_vkGetPhysicalDeviceQueueFamilyProperties) gpa(inst, "vkGetPhysicalDeviceQueueFamilyProperties");
    table->GetPhysicalDeviceMemoryProperties = (PFN_vkGetPhysicalDeviceMemoryProperties) gpa(inst, "vkGetPhysicalDeviceMemoryProperties");
    table->EnumerateDeviceExtensionProperties = (PFN_vkEnumerateDeviceExtensionProperties) gpa(inst, "vkEnumerateDeviceExtensionProperties");
    table->EnumerateDeviceLayerProperties = (PFN_vkEnumerateDeviceLayerProperties) gpa(inst, "vkEnumerateDeviceLayerProperties");
}

static inline void loader_init_instance_extension_dispatch_table(
        VkLayerInstanceDispatchTable *table,
        PFN_vkGetInstanceProcAddr gpa,
        VkInstance inst)
{
    table->DbgCreateMsgCallback = (PFN_vkDbgCreateMsgCallback) gpa(inst, "vkDbgCreateMsgCallback");
    table->DbgDestroyMsgCallback = (PFN_vkDbgDestroyMsgCallback) gpa(inst, "vkDbgDestroyMsgCallback");
    table->GetPhysicalDeviceSurfaceSupportKHR = (PFN_vkGetPhysicalDeviceSurfaceSupportKHR) gpa(inst, "vkGetPhysicalDeviceSurfaceSupportKHR");
    table->GetPhysicalDeviceSurfaceCapabilitiesKHR = (PFN_vkGetPhysicalDeviceSurfaceCapabilitiesKHR) gpa(inst, "vkGetPhysicalDeviceSurfaceCapabilitiesKHR");
    table->GetPhysicalDeviceSurfaceFormatsKHR = (PFN_vkGetPhysicalDeviceSurfaceFormatsKHR) gpa(inst, "vkGetPhysicalDeviceSurfaceFormatsKHR");
    table->GetPhysicalDeviceSurfacePresentModesKHR = (PFN_vkGetPhysicalDeviceSurfacePresentModesKHR) gpa(inst, "vkGetPhysicalDeviceSurfacePresentModesKHR");
#ifdef VK_USE_PLATFORM_MIR_KHR
    table->CreateMirSurfaceKHR = (PFN_vkCreateMirSurfaceKHR) gpa(inst, "vkCreateMirSurfaceKHR");
    table->GetPhysicalDeviceMirPresentationSupportKHR = (PFN_vkGetPhysicalDeviceMirPresentationSupportKHR) gpa(inst, "vkGetPhysicalDeviceMirPresentationSupportKHR");
#endif
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
    table->CreateWaylandSurfaceKHR = (PFN_vkCreateWaylandSurfaceKHR) gpa(inst, "vkCreateWaylandSurfaceKHR");
    table->GetPhysicalDeviceWaylandPresentationSupportKHR = (PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR) gpa(inst, "vkGetPhysicalDeviceWaylandPresentationSupportKHR");
#endif
#ifdef VK_USE_PLATFORM_WIN32_KHR
    table->CreateWin32SurfaceKHR = (PFN_vkCreateWin32SurfaceKHR) gpa(inst, "vkCreateWin32SurfaceKHR");
    table->GetPhysicalDeviceWin32PresentationSupportKHR = (PFN_vkGetPhysicalDeviceWin32PresentationSupportKHR) gpa(inst, "vkGetPhysicalDeviceWin32PresentationSupportKHR");
#endif
#ifdef VK_USE_PLATFORM_XCB_KHR
    table->CreateXcbSurfaceKHR = (PFN_vkCreateXcbSurfaceKHR) gpa(inst, "vkCreateXcbSurfaceKHR");
    table->GetPhysicalDeviceXcbPresentationSupportKHR = (PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR) gpa(inst, "vkGetPhysicalDeviceXcbPresentationSupportKHR");
#endif
#ifdef VK_USE_PLATFORM_XLIB_KHR
    table->CreateXlibSurfaceKHR = (PFN_vkCreateXlibSurfaceKHR) gpa(inst, "vkCreateXlibSurfaceKHR");
    table->GetPhysicalDeviceXlibPresentationSupportKHR = (PFN_vkGetPhysicalDeviceXlibPresentationSupportKHR) gpa(inst, "vkGetPhysicalDeviceXlibPresentationSupportKHR");
#endif
}

static inline void *loader_lookup_instance_dispatch_table(
                                        const VkLayerInstanceDispatchTable *table,
                                        const char *name)
{
    if (!name || name[0] != 'v' || name[1] != 'k')
        return NULL;

    name += 2;
    if (!strcmp(name, "CreateInstance"))
        return (void *) table->CreateInstance;
    if (!strcmp(name, "DestroyInstance"))
        return (void *) table->DestroyInstance;
    if (!strcmp(name, "EnumeratePhysicalDevices"))
        return (void *) table->EnumeratePhysicalDevices;
    if (!strcmp(name, "GetPhysicalDeviceFeatures"))
        return (void *) table->GetPhysicalDeviceFeatures;
    if (!strcmp(name, "GetPhysicalDeviceImageFormatProperties"))
        return (void *) table->GetPhysicalDeviceImageFormatProperties;
    if (!strcmp(name, "GetPhysicalDeviceFormatProperties"))
        return (void *) table->GetPhysicalDeviceFormatProperties;
    if (!strcmp(name, "GetPhysicalDeviceSparseImageFormatProperties"))
        return (void *) table->GetPhysicalDeviceSparseImageFormatProperties;
    if (!strcmp(name, "GetPhysicalDeviceProperties"))
        return (void *) table->GetPhysicalDeviceProperties;
    if (!strcmp(name, "GetPhysicalDeviceQueueFamilyProperties"))
        return (void *) table->GetPhysicalDeviceQueueFamilyProperties;
    if (!strcmp(name, "GetPhysicalDeviceMemoryProperties"))
        return (void *) table->GetPhysicalDeviceMemoryProperties;
    if (!strcmp(name, "GetInstanceProcAddr"))
        return (void *) table->GetInstanceProcAddr;
    if (!strcmp(name, "EnumerateDeviceExtensionProperties"))
        return (void *) table->EnumerateDeviceExtensionProperties;
    if (!strcmp(name, "EnumerateDeviceLayerProperties"))
        return (void *) table->EnumerateDeviceLayerProperties;
    if (!strcmp(name, "GetPhysicalDeviceSurfaceSupportKHR"))
        return (void *) table->GetPhysicalDeviceSurfaceSupportKHR;
    if (!strcmp(name, "GetPhysicalDeviceSurfaceCapabilitiesKHR"))
        return (void *) table->GetPhysicalDeviceSurfaceCapabilitiesKHR;
    if (!strcmp(name, "GetPhysicalDeviceSurfaceFormatsKHR"))
        return (void *) table->GetPhysicalDeviceSurfaceFormatsKHR;
    if (!strcmp(name, "GetPhysicalDeviceSurfacePresentModesKHR"))
        return (void *) table->GetPhysicalDeviceSurfacePresentModesKHR;
#ifdef VK_USE_PLATFORM_MIR_KHR
    if (!strcmp(name, "CreateMirSurfaceKHR"))
        return (void *) table->CreateMirSurfaceKHR;
    if (!strcmp(name, "GetPhysicalDeviceMirPresentationSupportKHR"))
        return (void *) table->GetPhysicalDeviceMirPresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
    if (!strcmp(name, "CreateWaylandSurfaceKHR"))
        return (void *) table->CreateWaylandSurfaceKHR;
    if (!strcmp(name, "GetPhysicalDeviceWaylandPresentationSupportKHR"))
        return (void *) table->GetPhysicalDeviceWaylandPresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_WIN32_KHR
    if (!strcmp(name, "CreateWin32SurfaceKHR"))
        return (void *) table->CreateWin32SurfaceKHR;
    if (!strcmp(name, "GetPhysicalDeviceWin32PresentationSupportKHR"))
        return (void *) table->GetPhysicalDeviceWin32PresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_XCB_KHR
    if (!strcmp(name, "CreateXcbSurfaceKHR"))
        return (void *) table->CreateXcbSurfaceKHR;
    if (!strcmp(name, "GetPhysicalDeviceXcbPresentationSupportKHR"))
        return (void *) table->GetPhysicalDeviceXcbPresentationSupportKHR;
#endif
#ifdef VK_USE_PLATFORM_XLIB_KHR
    if (!strcmp(name, "CreateXlibSurfaceKHR"))
        return (void *) table->CreateXlibSurfaceKHR;
    if (!strcmp(name, "GetPhysicalDeviceXlibPresentationSupportKHR"))
        return (void *) table->GetPhysicalDeviceXlibPresentationSupportKHR;
#endif
    if (!strcmp(name, "DbgCreateMsgCallback"))
        return (void *) table->DbgCreateMsgCallback;
    if (!strcmp(name, "DbgDestroyMsgCallback"))
        return (void *) table->DbgDestroyMsgCallback;

    return NULL;
}