layers/image.cpp

/*
 *
 * Copyright (C) 2015 Valve Corporation
 * Copyright (C) 2015 Google Inc.
 *
 * 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: Jeremy Hayes <jeremy@lunarg.com>
 * Author: Mark Lobodzinski <mark@lunarg.com>
 * Author: Mike Stroyan <mike@LunarG.com>
 * Author: Tobin Ehlis <tobin@lunarg.com>
 */

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <vector>
#include <unordered_map>
#include <memory>
using namespace std;

#include "vk_loader_platform.h"
#include "vk_dispatch_table_helper.h"
#include "vk_struct_string_helper_cpp.h"
#include "vk_enum_validate_helper.h"
#include "image.h"
#include "vk_layer_config.h"
#include "vk_layer_extension_utils.h"
#include "vk_layer_table.h"
#include "vk_layer_data.h"
#include "vk_layer_extension_utils.h"
#include "vk_layer_utils.h"
#include "vk_layer_logging.h"

using namespace std;

struct layer_data {
    debug_report_data            *report_data;
    vector<VkDebugReportCallbackEXT>      logging_callback;
    VkLayerDispatchTable*         device_dispatch_table;
    VkLayerInstanceDispatchTable *instance_dispatch_table;
    VkPhysicalDevice              physicalDevice;
    VkPhysicalDeviceProperties    physicalDeviceProperties;

    unordered_map<VkImage, IMAGE_STATE> imageMap;

    layer_data() :
        report_data(nullptr),
        device_dispatch_table(nullptr),
        instance_dispatch_table(nullptr),
        physicalDevice(0),
        physicalDeviceProperties()
    {};
};

static unordered_map<void*, layer_data*> layer_data_map;

static void InitImage(layer_data *data, const VkAllocationCallbacks *pAllocator)
{
    VkDebugReportCallbackEXT callback;
    uint32_t report_flags = getLayerOptionFlags("ImageReportFlags", 0);

    uint32_t debug_action = 0;
    getLayerOptionEnum("ImageDebugAction", (uint32_t *) &debug_action);
    if(debug_action & VK_DBG_LAYER_ACTION_LOG_MSG)
    {
        FILE *log_output = NULL;
        const char* option_str = getLayerOption("ImageLogFilename");
        log_output = getLayerLogOutput(option_str, "Image");
        VkDebugReportCallbackCreateInfoEXT dbgInfo;
        memset(&dbgInfo, 0, sizeof(dbgInfo));
        dbgInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
        dbgInfo.pfnCallback = log_callback;
        dbgInfo.pUserData = log_output;
        dbgInfo.flags = report_flags;
        layer_create_msg_callback(data->report_data, &dbgInfo, pAllocator, &callback);
        data->logging_callback.push_back(callback);
    }

    if (debug_action & VK_DBG_LAYER_ACTION_DEBUG_OUTPUT) {
        VkDebugReportCallbackCreateInfoEXT dbgInfo;
        memset(&dbgInfo, 0, sizeof(dbgInfo));
        dbgInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
        dbgInfo.pfnCallback = win32_debug_output_msg;
        dbgInfo.flags = report_flags;
        layer_create_msg_callback(data->report_data, &dbgInfo, pAllocator, &callback);
        data->logging_callback.push_back(callback);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateDebugReportCallbackEXT(
        VkInstance                                  instance,
        const VkDebugReportCallbackCreateInfoEXT*   pCreateInfo,
        const VkAllocationCallbacks*                pAllocator,
        VkDebugReportCallbackEXT*                   pMsgCallback)
{
    layer_data *my_data = get_my_data_ptr(get_dispatch_key(instance), layer_data_map);
    VkResult res = my_data->instance_dispatch_table->CreateDebugReportCallbackEXT(instance, pCreateInfo, pAllocator, pMsgCallback);
    if (res == VK_SUCCESS) {
        res = layer_create_msg_callback(my_data->report_data, pCreateInfo, pAllocator, pMsgCallback);
    }
    return res;
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroyDebugReportCallbackEXT(
        VkInstance                                  instance,
        VkDebugReportCallbackEXT                    msgCallback,
        const VkAllocationCallbacks*                pAllocator)
{
    layer_data *my_data = get_my_data_ptr(get_dispatch_key(instance), layer_data_map);
    my_data->instance_dispatch_table->DestroyDebugReportCallbackEXT(instance, msgCallback, pAllocator);
    layer_destroy_msg_callback(my_data->report_data, msgCallback, pAllocator);
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDebugReportMessageEXT(
        VkInstance                                  instance,
        VkDebugReportFlagsEXT                       flags,
        VkDebugReportObjectTypeEXT                  objType,
        uint64_t                                    object,
        size_t                                      location,
        int32_t                                     msgCode,
        const char*                                 pLayerPrefix,
        const char*                                 pMsg)
{
    layer_data *my_data = get_my_data_ptr(get_dispatch_key(instance), layer_data_map);
    my_data->instance_dispatch_table->DebugReportMessageEXT(instance, flags, objType, object, location, msgCode, pLayerPrefix, pMsg);
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateInstance(const VkInstanceCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkInstance* pInstance)
{
    layer_data *my_data = get_my_data_ptr(get_dispatch_key(*pInstance), layer_data_map);
    VkLayerInstanceDispatchTable *pTable = my_data->instance_dispatch_table;
    VkResult result = pTable->CreateInstance(pCreateInfo, pAllocator, pInstance);

    if (result == VK_SUCCESS) {
        my_data->report_data = debug_report_create_instance(pTable, *pInstance, pCreateInfo->enabledExtensionNameCount,
            pCreateInfo->ppEnabledExtensionNames);

        InitImage(my_data, pAllocator);
    }
    return result;
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroyInstance(VkInstance instance, const VkAllocationCallbacks* pAllocator)
{
    // Grab the key before the instance is destroyed.
    dispatch_key key = get_dispatch_key(instance);
    layer_data *my_data = get_my_data_ptr(key, layer_data_map);
    VkLayerInstanceDispatchTable *pTable = my_data->instance_dispatch_table;
    pTable->DestroyInstance(instance, pAllocator);

    // Clean up logging callback, if any
    while (my_data->logging_callback.size() > 0) {
        VkDebugReportCallbackEXT callback = my_data->logging_callback.back();
        layer_destroy_msg_callback(my_data->report_data, callback, pAllocator);
        my_data->logging_callback.pop_back();
    }

    layer_debug_report_destroy_instance(my_data->report_data);
    delete my_data->instance_dispatch_table;
    layer_data_map.erase(key);

}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateDevice(VkPhysicalDevice physicalDevice, const VkDeviceCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkDevice* pDevice)
{
    layer_data *instance_data = get_my_data_ptr(get_dispatch_key(physicalDevice), layer_data_map);
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(*pDevice), layer_data_map);
    VkResult result = device_data->device_dispatch_table->CreateDevice(physicalDevice, pCreateInfo, pAllocator, pDevice);
    if(result == VK_SUCCESS)
    {
        device_data->report_data = layer_debug_report_create_device(instance_data->report_data, *pDevice);
        device_data->physicalDevice = physicalDevice;
    }

    instance_data->instance_dispatch_table->GetPhysicalDeviceProperties(physicalDevice, &(device_data->physicalDeviceProperties));

    return result;
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroyDevice(VkDevice device, const VkAllocationCallbacks* pAllocator)
{
    dispatch_key key = get_dispatch_key(device);
    layer_data *my_data = get_my_data_ptr(key, layer_data_map);
    my_data->device_dispatch_table->DestroyDevice(device, pAllocator);
    delete my_data->device_dispatch_table;
    layer_data_map.erase(key);
}

static const VkExtensionProperties instance_extensions[] = {
    {
        VK_EXT_DEBUG_REPORT_EXTENSION_NAME,
        VK_EXT_DEBUG_REPORT_REVISION
    }
};

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkEnumerateInstanceExtensionProperties(
        const char *pLayerName,
        uint32_t *pCount,
        VkExtensionProperties* pProperties)
{
    return util_GetExtensionProperties(1, instance_extensions, pCount, pProperties);
}

static const VkLayerProperties pc_global_layers[] = {
    {
        "VK_LAYER_LUNARG_image",
        VK_API_VERSION,
        VK_MAKE_VERSION(0, 1, 0),
        "Validation layer: image",
    }
};

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkEnumerateInstanceLayerProperties(
        uint32_t *pCount,
        VkLayerProperties*    pProperties)
{
    return util_GetLayerProperties(ARRAY_SIZE(pc_global_layers),
                                   pc_global_layers,
                                   pCount, pProperties);
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkEnumerateDeviceExtensionProperties(
        VkPhysicalDevice                            physicalDevice,
        const char*                                 pLayerName,
        uint32_t*                                   pCount,
        VkExtensionProperties*                      pProperties)
{
    // Image does not have any physical device extensions
    if (pLayerName == NULL) {
        dispatch_key key = get_dispatch_key(physicalDevice);
        layer_data *my_data = get_my_data_ptr(key, layer_data_map);
        VkLayerInstanceDispatchTable *pTable = my_data->instance_dispatch_table;
        return pTable->EnumerateDeviceExtensionProperties(
                                                    physicalDevice,
                                                    NULL,
                                                    pCount,
                                                    pProperties);
    } else {
        return util_GetExtensionProperties(0, NULL, pCount, pProperties);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkEnumerateDeviceLayerProperties(
        VkPhysicalDevice                            physicalDevice,
        uint32_t*                                   pCount,
        VkLayerProperties*                          pProperties)
{
    // ParamChecker's physical device layers are the same as global
    return util_GetLayerProperties(ARRAY_SIZE(pc_global_layers), pc_global_layers,
                                   pCount, pProperties);
}

// Start of the Image layer proper

// Returns TRUE if a format is a depth-compatible format
bool is_depth_format(VkFormat format)
{
    bool result = VK_FALSE;
    switch (format) {
        case VK_FORMAT_D16_UNORM:
        case VK_FORMAT_X8_D24_UNORM_PACK32:
        case VK_FORMAT_D32_SFLOAT:
        case VK_FORMAT_S8_UINT:
        case VK_FORMAT_D16_UNORM_S8_UINT:
        case VK_FORMAT_D24_UNORM_S8_UINT:
        case VK_FORMAT_D32_SFLOAT_S8_UINT:
            result = VK_TRUE;
            break;
        default:
            break;
    }
    return result;
}

static inline uint32_t validate_VkImageLayoutKHR(VkImageLayout input_value)
{
    return ((validate_VkImageLayout(input_value) == 1) ||
            (input_value == VK_IMAGE_LAYOUT_PRESENT_SRC_KHR));
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateImage(VkDevice device, const VkImageCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkImage* pImage)
{
    VkBool32                skipCall              = VK_FALSE;
    VkResult                result                = VK_ERROR_VALIDATION_FAILED_EXT;
    VkImageFormatProperties ImageFormatProperties = {0};

    layer_data       *device_data    = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    VkPhysicalDevice  physicalDevice = device_data->physicalDevice;
    layer_data       *phy_dev_data   = get_my_data_ptr(get_dispatch_key(physicalDevice), layer_data_map);

    if (pCreateInfo->format != VK_FORMAT_UNDEFINED)
    {
        VkFormatProperties properties;
        phy_dev_data->instance_dispatch_table->GetPhysicalDeviceFormatProperties(
                device_data->physicalDevice, pCreateInfo->format, &properties);

        if ((properties.linearTilingFeatures) == 0 && (properties.optimalTilingFeatures == 0))
        {
            char const str[] = "vkCreateImage parameter, VkFormat pCreateInfo->format, contains unsupported format";
            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_FORMAT_UNSUPPORTED, "IMAGE", str);
        }
    }

    // Internal call to get format info.  Still goes through layers, could potentially go directly to ICD.
    phy_dev_data->instance_dispatch_table->GetPhysicalDeviceImageFormatProperties(
                       physicalDevice, pCreateInfo->format, pCreateInfo->imageType, pCreateInfo->tiling,
                       pCreateInfo->usage, pCreateInfo->flags, &ImageFormatProperties);

    VkDeviceSize imageGranularity = device_data->physicalDeviceProperties.limits.bufferImageGranularity;
    imageGranularity = imageGranularity == 1 ? 0 : imageGranularity;

    if ((pCreateInfo->extent.depth  > ImageFormatProperties.maxExtent.depth)  ||
        (pCreateInfo->extent.width  > ImageFormatProperties.maxExtent.width)  ||
        (pCreateInfo->extent.height > ImageFormatProperties.maxExtent.height)) {
        skipCall |= log_msg(phy_dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT, (uint64_t)pImage, __LINE__,
                        IMAGE_INVALID_FORMAT_LIMITS_VIOLATION, "Image",
                        "CreateImage extents exceed allowable limits for format: "
                        "Width = %d Height = %d Depth = %d:  Limits for Width = %d Height = %d Depth = %d for format %s.",
                        pCreateInfo->extent.width, pCreateInfo->extent.height, pCreateInfo->extent.depth,
                        ImageFormatProperties.maxExtent.width, ImageFormatProperties.maxExtent.height, ImageFormatProperties.maxExtent.depth,
                        string_VkFormat(pCreateInfo->format));

    }

    uint64_t totalSize = ((uint64_t)pCreateInfo->extent.width               *
                          (uint64_t)pCreateInfo->extent.height              *
                          (uint64_t)pCreateInfo->extent.depth               *
                          (uint64_t)pCreateInfo->arrayLayers                *
                          (uint64_t)pCreateInfo->samples                    *
                          (uint64_t)vk_format_get_size(pCreateInfo->format) +
                          (uint64_t)imageGranularity ) & ~(uint64_t)imageGranularity;

    if (totalSize > ImageFormatProperties.maxResourceSize) {
        skipCall |= log_msg(phy_dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT, (uint64_t)pImage, __LINE__,
                        IMAGE_INVALID_FORMAT_LIMITS_VIOLATION, "Image",
                        "CreateImage resource size exceeds allowable maximum "
                        "Image resource size = %#" PRIxLEAST64 ", maximum resource size = %#" PRIxLEAST64 " ",
                        totalSize, ImageFormatProperties.maxResourceSize);
    }

    if (pCreateInfo->mipLevels > ImageFormatProperties.maxMipLevels) {
        skipCall |= log_msg(phy_dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT, (uint64_t)pImage, __LINE__,
                        IMAGE_INVALID_FORMAT_LIMITS_VIOLATION, "Image",
                        "CreateImage mipLevels=%d exceeds allowable maximum supported by format of %d",
                        pCreateInfo->mipLevels, ImageFormatProperties.maxMipLevels);
    }

    if (pCreateInfo->arrayLayers > ImageFormatProperties.maxArrayLayers) {
        skipCall |= log_msg(phy_dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT, (uint64_t)pImage, __LINE__,
                        IMAGE_INVALID_FORMAT_LIMITS_VIOLATION, "Image",
                        "CreateImage arrayLayers=%d exceeds allowable maximum supported by format of %d",
                        pCreateInfo->arrayLayers, ImageFormatProperties.maxArrayLayers);
    }

    if ((pCreateInfo->samples & ImageFormatProperties.sampleCounts) == 0) {
        skipCall |= log_msg(phy_dev_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT, (uint64_t)pImage, __LINE__,
                        IMAGE_INVALID_FORMAT_LIMITS_VIOLATION, "Image",
                        "CreateImage samples %s is not supported by format 0x%.8X",
                        string_VkSampleCountFlagBits(pCreateInfo->samples), ImageFormatProperties.sampleCounts);
    }

    if (VK_FALSE == skipCall) {
        result = device_data->device_dispatch_table->CreateImage(device, pCreateInfo, pAllocator, pImage);
    }
    if (result == VK_SUCCESS) {
        device_data->imageMap[*pImage] = IMAGE_STATE(pCreateInfo);
    }
    return result;
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkDestroyImage(VkDevice device, VkImage image, const VkAllocationCallbacks* pAllocator)
{
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    device_data->imageMap.erase(image);
    device_data->device_dispatch_table->DestroyImage(device, image, pAllocator);
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateRenderPass(VkDevice device, const VkRenderPassCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkRenderPass* pRenderPass)
{
    layer_data *my_data = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    VkBool32 skipCall = VK_FALSE;
    for(uint32_t i = 0; i < pCreateInfo->attachmentCount; ++i)
    {
        if(pCreateInfo->pAttachments[i].format != VK_FORMAT_UNDEFINED)
        {
            VkFormatProperties properties;
            get_my_data_ptr(get_dispatch_key(my_data->physicalDevice), layer_data_map)->instance_dispatch_table->GetPhysicalDeviceFormatProperties(
                    my_data->physicalDevice, pCreateInfo->pAttachments[i].format, &properties);

            if((properties.linearTilingFeatures) == 0 && (properties.optimalTilingFeatures == 0))
            {
                std::stringstream ss;
                ss << "vkCreateRenderPass parameter, VkFormat in pCreateInfo->pAttachments[" << i << "], contains unsupported format";
                // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid
                skipCall |= log_msg(my_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_FORMAT_UNSUPPORTED, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }

    for(uint32_t i = 0; i < pCreateInfo->attachmentCount; ++i)
    {
        if(!validate_VkImageLayoutKHR(pCreateInfo->pAttachments[i].initialLayout) ||
           !validate_VkImageLayoutKHR(pCreateInfo->pAttachments[i].finalLayout))
        {
            std::stringstream ss;
            ss << "vkCreateRenderPass parameter, VkImageLayout in pCreateInfo->pAttachments[" << i << "], is unrecognized";
            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid
            skipCall |= log_msg(my_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_RENDERPASS_INVALID_ATTACHMENT, "IMAGE", "%s", ss.str().c_str());
        }
    }

    for(uint32_t i = 0; i < pCreateInfo->attachmentCount; ++i)
    {
        if(!validate_VkAttachmentLoadOp(pCreateInfo->pAttachments[i].loadOp))
        {
            std::stringstream ss;
            ss << "vkCreateRenderPass parameter, VkAttachmentLoadOp in pCreateInfo->pAttachments[" << i << "], is unrecognized";
            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid
            skipCall |= log_msg(my_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_RENDERPASS_INVALID_ATTACHMENT, "IMAGE", "%s", ss.str().c_str());
        }
    }

    for(uint32_t i = 0; i < pCreateInfo->attachmentCount; ++i)
    {
        if(!validate_VkAttachmentStoreOp(pCreateInfo->pAttachments[i].storeOp))
        {
            std::stringstream ss;
            ss << "vkCreateRenderPass parameter, VkAttachmentStoreOp in pCreateInfo->pAttachments[" << i << "], is unrecognized";
            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid
            skipCall |= log_msg(my_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_RENDERPASS_INVALID_ATTACHMENT, "IMAGE", "%s", ss.str().c_str());
        }
    }

    // Any depth buffers specified as attachments?
    bool depthFormatPresent = VK_FALSE;
    for (uint32_t i = 0; i < pCreateInfo->attachmentCount; ++i)
    {
        depthFormatPresent |= is_depth_format(pCreateInfo->pAttachments[i].format);
    }

    if (depthFormatPresent == VK_FALSE) {
        // No depth attachment is present, validate that subpasses set depthStencilAttachment to VK_ATTACHMENT_UNUSED;
        for (uint32_t i = 0; i < pCreateInfo->subpassCount; i++) {
            if (pCreateInfo->pSubpasses[i].pDepthStencilAttachment &&
                pCreateInfo->pSubpasses[i].pDepthStencilAttachment->attachment != VK_ATTACHMENT_UNUSED) {
                std::stringstream ss;
                ss << "vkCreateRenderPass has no depth/stencil attachment, yet subpass[" << i << "] has VkSubpassDescription::depthStencilAttachment value that is not VK_ATTACHMENT_UNUSED";
                skipCall |= log_msg(my_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_RENDERPASS_INVALID_DS_ATTACHMENT, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }
    if (skipCall)
        return VK_ERROR_VALIDATION_FAILED_EXT;

    VkResult result = my_data->device_dispatch_table->CreateRenderPass(device, pCreateInfo, pAllocator, pRenderPass);

    return result;
}

VK_LAYER_EXPORT VKAPI_ATTR VkResult VKAPI_CALL vkCreateImageView(VkDevice device, const VkImageViewCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkImageView* pView)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    auto imageEntry = device_data->imageMap.find(pCreateInfo->image);
    if (imageEntry != device_data->imageMap.end()) {
        if (pCreateInfo->subresourceRange.baseMipLevel >= imageEntry->second.mipLevels) {
            std::stringstream ss;
            ss << "vkCreateImageView called with baseMipLevel " << pCreateInfo->subresourceRange.baseMipLevel
               << " for image " << pCreateInfo->image << " that only has " << imageEntry->second.mipLevels << " mip levels.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_VIEW_CREATE_ERROR, "IMAGE", "%s", ss.str().c_str());
        }
        if (pCreateInfo->subresourceRange.baseArrayLayer >= imageEntry->second.arraySize) {
            std::stringstream ss;
            ss << "vkCreateImageView called with baseArrayLayer " << pCreateInfo->subresourceRange.baseArrayLayer << " for image "
               << pCreateInfo->image << " that only has " << imageEntry->second.arraySize << " mip levels.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_VIEW_CREATE_ERROR, "IMAGE", "%s", ss.str().c_str());
        }
        if (!pCreateInfo->subresourceRange.levelCount) {
            std::stringstream ss;
            ss << "vkCreateImageView called with 0 in pCreateInfo->subresourceRange.levelCount.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_VIEW_CREATE_ERROR, "IMAGE", "%s", ss.str().c_str());
        }
        if (!pCreateInfo->subresourceRange.layerCount) {
            std::stringstream ss;
            ss << "vkCreateImageView called with 0 in pCreateInfo->subresourceRange.layerCount.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0, 0, __LINE__, IMAGE_VIEW_CREATE_ERROR, "IMAGE", "%s", ss.str().c_str());
        }

        // Validate correct image aspect bits for desired formats and format consistency
        VkFormat           imageFormat = imageEntry->second.format;
        VkFormat           ivciFormat  = pCreateInfo->format;
        VkImageAspectFlags aspectMask  = pCreateInfo->subresourceRange.aspectMask;

        if (vk_format_is_color(imageFormat)) {
            if ((aspectMask & VK_IMAGE_ASPECT_COLOR_BIT) != VK_IMAGE_ASPECT_COLOR_BIT) {
                std::stringstream ss;
                ss << "vkCreateImageView: Color image formats must have the VK_IMAGE_ASPECT_COLOR_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
            if ((aspectMask & VK_IMAGE_ASPECT_COLOR_BIT) != aspectMask) {
                std::stringstream ss;
                ss << "vkCreateImageView: Color image formats must have ONLY the VK_IMAGE_ASPECT_COLOR_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
            if (VK_FALSE == vk_format_is_color(ivciFormat)) {
                std::stringstream ss;
                ss << "vkCreateImageView: The image view's format can differ from the parent image's format, but both must be "
                   << "color formats.  ImageFormat is " << string_VkFormat(imageFormat) << " ImageViewFormat is " << string_VkFormat(ivciFormat);
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_FORMAT, "IMAGE", "%s", ss.str().c_str());
            }
            // TODO:  Uncompressed formats are compatible if they occupy they same number of bits per pixel.
            //        Compressed formats are compatible if the only difference between them is the numerical type of
            //        the uncompressed pixels (e.g. signed vs. unsigned, or sRGB vs. UNORM encoding).
        } else  if (vk_format_is_depth_and_stencil(imageFormat)) {
            if ((aspectMask & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) == 0) {
                std::stringstream ss;
                ss << "vkCreateImageView: Depth/stencil image formats must have at least one of VK_IMAGE_ASPECT_DEPTH_BIT and VK_IMAGE_ASPECT_STENCIL_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
            if ((aspectMask & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) != aspectMask) {
                std::stringstream ss;
                ss << "vkCreateImageView: Combination depth/stencil image formats can have only the VK_IMAGE_ASPECT_DEPTH_BIT and VK_IMAGE_ASPECT_STENCIL_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
        } else  if (vk_format_is_depth_only(imageFormat)) {
            if ((aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT) != VK_IMAGE_ASPECT_DEPTH_BIT) {
                std::stringstream ss;
                ss << "vkCreateImageView: Depth-only image formats must have the VK_IMAGE_ASPECT_DEPTH_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
            if ((aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT) != aspectMask) {
                std::stringstream ss;
                ss << "vkCreateImageView: Depth-only image formats can have only the VK_IMAGE_ASPECT_DEPTH_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
        } else  if (vk_format_is_stencil_only(imageFormat)) {
            if ((aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT) != VK_IMAGE_ASPECT_STENCIL_BIT) {
                std::stringstream ss;
                ss << "vkCreateImageView: Stencil-only image formats must have the VK_IMAGE_ASPECT_STENCIL_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
            if ((aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT) != aspectMask) {
                std::stringstream ss;
                ss << "vkCreateImageView: Stencil-only image formats can have only the VK_IMAGE_ASPECT_STENCIL_BIT set";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)pCreateInfo->image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }

    if (skipCall)
        return VK_ERROR_VALIDATION_FAILED_EXT;

    VkResult result = device_data->device_dispatch_table->CreateImageView(device, pCreateInfo, pAllocator, pView);
    return result;
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdClearColorImage(
    VkCommandBuffer                commandBuffer,
    VkImage                        image,
    VkImageLayout                  imageLayout,
    const VkClearColorValue       *pColor,
    uint32_t                       rangeCount,
    const VkImageSubresourceRange *pRanges)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    // For each range, image aspect must be color only
    for (uint32_t i = 0; i < rangeCount; i++) {
        if (pRanges[i].aspectMask != VK_IMAGE_ASPECT_COLOR_BIT) {
            char const str[] = "vkCmdClearColorImage aspectMasks for all subresource ranges must be set to VK_IMAGE_ASPECT_COLOR_BIT";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdClearColorImage(commandBuffer, image, imageLayout,
                                                               pColor, rangeCount, pRanges);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdClearDepthStencilImage(
    VkCommandBuffer                 commandBuffer,
    VkImage                         image,
    VkImageLayout                   imageLayout,
    const VkClearDepthStencilValue *pDepthStencil,
    uint32_t                        rangeCount,
    const VkImageSubresourceRange  *pRanges)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    // For each range, Image aspect must be depth or stencil or both
    for (uint32_t i = 0; i < rangeCount; i++) {
        if (((pRanges[i].aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT)   != VK_IMAGE_ASPECT_DEPTH_BIT) &&
            ((pRanges[i].aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT) != VK_IMAGE_ASPECT_STENCIL_BIT))
        {
            char const str[] = "vkCmdClearDepthStencilImage aspectMasks for all subresource ranges must be "
                               "set to VK_IMAGE_ASPECT_DEPTH_BIT and/or VK_IMAGE_ASPECT_STENCIL_BIT";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdClearDepthStencilImage(commandBuffer,
            image, imageLayout, pDepthStencil, rangeCount, pRanges);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdCopyImage(
    VkCommandBuffer    commandBuffer,
    VkImage            srcImage,
    VkImageLayout      srcImageLayout,
    VkImage            dstImage,
    VkImageLayout      dstImageLayout,
    uint32_t           regionCount,
    const VkImageCopy *pRegions)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    auto srcImageEntry = device_data->imageMap.find(srcImage);
    auto dstImageEntry = device_data->imageMap.find(dstImage);

    // For each region, src and dst number of layers should not be zero
    // For each region, src and dst number of layers must match
    // For each region, src aspect mask must match dest aspect mask
    // For each region, color aspects cannot be mixed with depth/stencil aspects
    for (uint32_t i = 0; i < regionCount; i++) {
        if(pRegions[i].srcSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdCopyImage: number of layers in source subresource is zero";
            // TODO: Verify against Valid Use section of spec
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        if(pRegions[i].dstSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdCopyImage: number of layers in destination subresource is zero";
            // TODO: Verify against Valid Use section of spec
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        if(pRegions[i].srcSubresource.layerCount != pRegions[i].dstSubresource.layerCount)
        {
            char const str[] = "vkCmdCopyImage: number of layers in source and destination subresources must match";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        if (pRegions[i].srcSubresource.aspectMask != pRegions[i].dstSubresource.aspectMask) {
            char const str[] = "vkCmdCopyImage: Src and dest aspectMasks for each region must match";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }
        if ((pRegions[i].srcSubresource.aspectMask & VK_IMAGE_ASPECT_COLOR_BIT) &&
            (pRegions[i].srcSubresource.aspectMask & (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT))) {
            char const str[] = "vkCmdCopyImage aspectMask cannot specify both COLOR and DEPTH/STENCIL aspects";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if ((srcImageEntry != device_data->imageMap.end())
    && (dstImageEntry != device_data->imageMap.end())) {
        if (srcImageEntry->second.imageType != dstImageEntry->second.imageType) {
            char const str[] = "vkCmdCopyImage called with unmatched source and dest image types.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_TYPE, "IMAGE", str);
        }
        // Check that format is same size or exact stencil/depth
        if (is_depth_format(srcImageEntry->second.format)) {
            if (srcImageEntry->second.format != dstImageEntry->second.format) {
                char const str[] = "vkCmdCopyImage called with unmatched source and dest image depth/stencil formats.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                    (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_FORMAT, "IMAGE", str);
            }
        } else {
            size_t srcSize = vk_format_get_size(srcImageEntry->second.format);
            size_t destSize = vk_format_get_size(dstImageEntry->second.format);
            if (srcSize != destSize) {
                char const str[] = "vkCmdCopyImage called with unmatched source and dest image format sizes.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                    (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_FORMAT, "IMAGE", str);
            }
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdCopyImage(commandBuffer, srcImage,
            srcImageLayout, dstImage, dstImageLayout, regionCount, pRegions);
    }
}

VKAPI_ATTR void VKAPI_CALL vkCmdClearAttachments(
    VkCommandBuffer                             commandBuffer,
    uint32_t                                    attachmentCount,
    const VkClearAttachment*                    pAttachments,
    uint32_t                                    rectCount,
    const VkClearRect*                          pRects)
{
    VkBool32 skipCall = VK_FALSE;
    VkImageAspectFlags aspectMask;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    for (uint32_t i = 0; i < attachmentCount; i++) {
        aspectMask = pAttachments[i].aspectMask;
        if (aspectMask & VK_IMAGE_ASPECT_COLOR_BIT) {
            if (aspectMask != VK_IMAGE_ASPECT_COLOR_BIT) {
                // VK_IMAGE_ASPECT_COLOR_BIT is not the only bit set for this attachment
                char const str[] = "vkCmdClearAttachments aspectMask [%d] must set only VK_IMAGE_ASPECT_COLOR_BIT of a color attachment.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str, i);
            }
        } else {
            // Image aspect must be depth or stencil or both
            if (((aspectMask & VK_IMAGE_ASPECT_DEPTH_BIT)   != VK_IMAGE_ASPECT_DEPTH_BIT) &&
                ((aspectMask & VK_IMAGE_ASPECT_STENCIL_BIT) != VK_IMAGE_ASPECT_STENCIL_BIT))
            {
                char const str[] = "vkCmdClearAttachments aspectMask [%d] must be set to VK_IMAGE_ASPECT_DEPTH_BIT and/or VK_IMAGE_ASPECT_STENCIL_BIT";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                    (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str, i);
            }
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdClearAttachments(commandBuffer,
            attachmentCount, pAttachments, rectCount, pRects);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdCopyImageToBuffer(
    VkCommandBuffer          commandBuffer,
    VkImage                  srcImage,
    VkImageLayout            srcImageLayout,
    VkBuffer                 dstBuffer,
    uint32_t                 regionCount,
    const VkBufferImageCopy *pRegions)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    // For each region, the number of layers in the image subresource should not be zero
    // Image aspect must be ONE OF color, depth, stencil
    for (uint32_t i = 0; i < regionCount; i++) {
        if(pRegions[i].imageSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdCopyImageToBuffer: number of layers in image subresource is zero";
            // TODO: Verify against Valid Use section of spec, if this case yields undefined results, then it's an error
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        VkImageAspectFlags aspectMask = pRegions[i].imageSubresource.aspectMask;
        if ((aspectMask != VK_IMAGE_ASPECT_COLOR_BIT) &&
            (aspectMask != VK_IMAGE_ASPECT_DEPTH_BIT) &&
            (aspectMask != VK_IMAGE_ASPECT_STENCIL_BIT)) {
            char const str[] = "vkCmdCopyImageToBuffer: aspectMasks for each region must specify only COLOR or DEPTH or STENCIL";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdCopyImageToBuffer(commandBuffer,
            srcImage, srcImageLayout, dstBuffer, regionCount, pRegions);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdCopyBufferToImage(
    VkCommandBuffer          commandBuffer,
    VkBuffer                 srcBuffer,
    VkImage                  dstImage,
    VkImageLayout            dstImageLayout,
    uint32_t                 regionCount,
    const VkBufferImageCopy *pRegions)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    // For each region, the number of layers in the image subresource should not be zero
    // Image aspect must be ONE OF color, depth, stencil
    for (uint32_t i = 0; i < regionCount; i++) {
        if(pRegions[i].imageSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdCopyBufferToImage: number of layers in image subresource is zero";
            // TODO: Verify against Valid Use section of spec, if this case yields undefined results, then it's an error
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        VkImageAspectFlags aspectMask = pRegions[i].imageSubresource.aspectMask;
        if ((aspectMask != VK_IMAGE_ASPECT_COLOR_BIT) &&
            (aspectMask != VK_IMAGE_ASPECT_DEPTH_BIT) &&
            (aspectMask != VK_IMAGE_ASPECT_STENCIL_BIT)) {
            char const str[] = "vkCmdCopyBufferToImage: aspectMasks for each region must specify only COLOR or DEPTH or STENCIL";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdCopyBufferToImage(commandBuffer,
            srcBuffer, dstImage, dstImageLayout, regionCount, pRegions);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdBlitImage(
    VkCommandBuffer    commandBuffer,
    VkImage            srcImage,
    VkImageLayout      srcImageLayout,
    VkImage            dstImage,
    VkImageLayout      dstImageLayout,
    uint32_t           regionCount,
    const VkImageBlit *pRegions,
    VkFilter        filter)
{
    VkBool32    skipCall    = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);

    auto srcImageEntry  = device_data->imageMap.find(srcImage);
    auto dstImageEntry = device_data->imageMap.find(dstImage);

    if ((srcImageEntry  != device_data->imageMap.end()) &&
        (dstImageEntry != device_data->imageMap.end())) {

        VkFormat srcFormat = srcImageEntry->second.format;
        VkFormat dstFormat = dstImageEntry->second.format;

        // Validate consistency for signed and unsigned formats
        if ((vk_format_is_sint(srcFormat) && !vk_format_is_sint(dstFormat)) ||
            (vk_format_is_uint(srcFormat) && !vk_format_is_uint(dstFormat))) {
            std::stringstream ss;
            ss << "vkCmdBlitImage: If one of srcImage and dstImage images has signed/unsigned integer format, "
               << "the other one must also have signed/unsigned integer format.  "
               << "Source format is " << string_VkFormat(srcFormat) << " Destination format is " << string_VkFormat(dstFormat);
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                               (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_FORMAT, "IMAGE", "%s", ss.str().c_str());
        }

        // Validate aspect bits and formats for depth/stencil images
        if (vk_format_is_depth_or_stencil(srcFormat) ||
            vk_format_is_depth_or_stencil(dstFormat)) {
            if (srcFormat != dstFormat) {
                std::stringstream ss;
                ss << "vkCmdBlitImage: If one of srcImage and dstImage images has a format of depth, stencil or depth "
                   << "stencil, the other one must have exactly the same format.  "
                   << "Source format is " << string_VkFormat(srcFormat) << " Destination format is " << string_VkFormat(dstFormat);
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                   (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_FORMAT, "IMAGE", "%s", ss.str().c_str());
            }

            for (uint32_t i = 0; i < regionCount; i++) {
                if(pRegions[i].srcSubresource.layerCount == 0)
                {
                    char const str[] = "vkCmdBlitImage: number of layers in source subresource is zero";
                    // TODO: Verify against Valid Use section of spec, if this case yields undefined results, then it's an error
                    skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                        (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
                }

                if(pRegions[i].dstSubresource.layerCount == 0)
                {
                    char const str[] = "vkCmdBlitImage: number of layers in destination subresource is zero";
                    // TODO: Verify against Valid Use section of spec, if this case yields undefined results, then it's an error
                    skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                        (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
                }

                if(pRegions[i].srcSubresource.layerCount != pRegions[i].dstSubresource.layerCount)
                {
                    char const str[] = "vkCmdBlitImage: number of layers in source and destination subresources must match";
                    skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                        (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
                }

                VkImageAspectFlags srcAspect = pRegions[i].srcSubresource.aspectMask;
                VkImageAspectFlags dstAspect = pRegions[i].dstSubresource.aspectMask;

                if (srcAspect != dstAspect) {
                    std::stringstream ss;
                    ss << "vkCmdBlitImage: Image aspects of depth/stencil images should match";
                    // TODO: Verify against Valid Use section of spec, if this case yields undefined results, then it's an error
                    skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                       (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
                }
                if (vk_format_is_depth_and_stencil(srcFormat)) {
                    if (srcAspect != (VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT)) {
                        std::stringstream ss;
                        ss << "vkCmdBlitImage: Combination depth/stencil image formats must have both VK_IMAGE_ASPECT_DEPTH_BIT "
                           << "and VK_IMAGE_ASPECT_STENCIL_BIT set in both the srcImage and dstImage";
                        skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                           (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
                    }
                } else if (vk_format_is_stencil_only(srcFormat)) {
                    if (srcAspect != VK_IMAGE_ASPECT_STENCIL_BIT) {
                        std::stringstream ss;
                        ss << "vkCmdBlitImage: Stencil-only image formats must have only the VK_IMAGE_ASPECT_STENCIL_BIT "
                           << "set in both the srcImage and dstImage";
                        skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                           (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
                    }
                } else if (vk_format_is_depth_only(srcFormat)) {
                    if (srcAspect != VK_IMAGE_ASPECT_DEPTH_BIT) {
                        std::stringstream ss;
                        ss << "vkCmdBlitImage: Depth-only image formats must have only the VK_IMAGE_ASPECT_DEPTH "
                           << "set in both the srcImage and dstImage";
                        skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                           (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
                    }
                }
            }
        }

        // Validate filter
        if (vk_format_is_depth_or_stencil(srcFormat) ||
            vk_format_is_int(srcFormat)) {
            if (filter != VK_FILTER_NEAREST) {
                std::stringstream ss;
                ss << "vkCmdBlitImage: If the format of srcImage is a depth, stencil, depth stencil or integer-based format "
                   << "then filter must be VK_FILTER_NEAREST.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                   (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_FILTER, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }

    device_data->device_dispatch_table->CmdBlitImage(commandBuffer, srcImage,
        srcImageLayout, dstImage, dstImageLayout, regionCount, pRegions, filter);
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdPipelineBarrier(
    VkCommandBuffer                             commandBuffer,
    VkPipelineStageFlags                        srcStageMask,
    VkPipelineStageFlags                        dstStageMask,
    VkDependencyFlags                           dependencyFlags,
    uint32_t                                    memoryBarrierCount,
    const void* const*                          ppMemoryBarriers)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);

    for (uint32_t i = 0; i < memoryBarrierCount; ++i)
    {
        VkImageMemoryBarrier const*const barrier = (VkImageMemoryBarrier const*const)ppMemoryBarriers[i];
        if (barrier->sType == VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER)
        {
            if (barrier->subresourceRange.layerCount == 0)
            {
                std::stringstream ss;
                ss << "vkCmdPipelineBarrier called with 0 in ppMemoryBarriers[" << i << "]->subresourceRange.layerCount.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, (VkDebugReportObjectTypeEXT)0,
                                    0, __LINE__, IMAGE_INVALID_IMAGE_RESOURCE, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }

    if (skipCall)
    {
        return;
    }

    device_data->device_dispatch_table->CmdPipelineBarrier(commandBuffer, srcStageMask, dstStageMask, dependencyFlags,
        memoryBarrierCount, ppMemoryBarriers);
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkCmdResolveImage(
    VkCommandBuffer       commandBuffer,
    VkImage               srcImage,
    VkImageLayout         srcImageLayout,
    VkImage               dstImage,
    VkImageLayout         dstImageLayout,
    uint32_t              regionCount,
    const VkImageResolve *pRegions)
{
    VkBool32 skipCall = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(commandBuffer), layer_data_map);
    auto srcImageEntry = device_data->imageMap.find(srcImage);
    auto dstImageEntry = device_data->imageMap.find(dstImage);

    // For each region, the number of layers in the image subresource should not be zero
    // For each region, src and dest image aspect must be color only
    for (uint32_t i = 0; i < regionCount; i++) {
        if(pRegions[i].srcSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdResolveImage: number of layers in source subresource is zero";
            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid/error
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        if(pRegions[i].dstSubresource.layerCount == 0)
        {
            char const str[] = "vkCmdResolveImage: number of layers in destination subresource is zero";

            // TODO: Verify against Valid Use section of spec. Generally if something yield an undefined result, it's invalid/error
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_WARN_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_ASPECT, "IMAGE", str);
        }

        if ((pRegions[i].srcSubresource.aspectMask  != VK_IMAGE_ASPECT_COLOR_BIT) ||
            (pRegions[i].dstSubresource.aspectMask != VK_IMAGE_ASPECT_COLOR_BIT)) {
            char const str[] = "vkCmdResolveImage: src and dest aspectMasks for each region must specify only VK_IMAGE_ASPECT_COLOR_BIT";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", str);
        }
    }

    if ((srcImageEntry  != device_data->imageMap.end()) &&
        (dstImageEntry != device_data->imageMap.end())) {
        if (srcImageEntry->second.format != dstImageEntry->second.format) {
            char const str[] =  "vkCmdResolveImage called with unmatched source and dest formats.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_FORMAT, "IMAGE", str);
        }
        if (srcImageEntry->second.imageType != dstImageEntry->second.imageType) {
            char const str[] =  "vkCmdResolveImage called with unmatched source and dest image types.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_MISMATCHED_IMAGE_TYPE, "IMAGE", str);
        }
        if (srcImageEntry->second.samples == VK_SAMPLE_COUNT_1_BIT) {
            char const str[] =  "vkCmdResolveImage called with source sample count less than 2.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_RESOLVE_SAMPLES,  "IMAGE", str);
        }
        if (dstImageEntry->second.samples != VK_SAMPLE_COUNT_1_BIT) {
            char const str[] =  "vkCmdResolveImage called with dest sample count greater than 1.";
            skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT,
                                (uint64_t)commandBuffer, __LINE__, IMAGE_INVALID_RESOLVE_SAMPLES, "IMAGE", str);
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->CmdResolveImage(commandBuffer, srcImage,
            srcImageLayout, dstImage, dstImageLayout, regionCount, pRegions);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkGetImageSubresourceLayout(
    VkDevice                  device,
    VkImage                   image,
    const VkImageSubresource *pSubresource,
    VkSubresourceLayout      *pLayout)
{
    VkBool32    skipCall    = VK_FALSE;
    layer_data *device_data = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    VkFormat    format;

    auto imageEntry = device_data->imageMap.find(image);

    // Validate that image aspects match formats
    if (imageEntry != device_data->imageMap.end()) {
        format = imageEntry->second.format;
        if (vk_format_is_color(format)) {
            if (pSubresource->aspectMask != VK_IMAGE_ASPECT_COLOR_BIT) {
                std::stringstream ss;
                ss << "vkGetImageSubresourceLayout: For color formats, the aspectMask field of VkImageSubresource must be VK_IMAGE_ASPECT_COLOR.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
        } else if (vk_format_is_depth_or_stencil(format)) {
            if ((pSubresource->aspectMask != VK_IMAGE_ASPECT_DEPTH_BIT) &&
                (pSubresource->aspectMask != VK_IMAGE_ASPECT_STENCIL_BIT)) {
                std::stringstream ss;
                ss << "vkGetImageSubresourceLayout: For depth/stencil formats, the aspectMask selects either the depth or stencil image aspectMask.";
                skipCall |= log_msg(device_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT,
                                   (uint64_t)image, __LINE__, IMAGE_INVALID_IMAGE_ASPECT, "IMAGE", "%s", ss.str().c_str());
            }
        }
    }

    if (VK_FALSE == skipCall) {
        device_data->device_dispatch_table->GetImageSubresourceLayout(device,
                           image, pSubresource, pLayout);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR void VKAPI_CALL vkGetPhysicalDeviceProperties(VkPhysicalDevice physicalDevice, VkPhysicalDeviceProperties* pProperties)
{
    layer_data *phy_dev_data = get_my_data_ptr(get_dispatch_key(physicalDevice), layer_data_map);
    phy_dev_data->instance_dispatch_table->GetPhysicalDeviceProperties(physicalDevice, pProperties);
}

VK_LAYER_EXPORT VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vkGetDeviceProcAddr(VkDevice device, const char* funcName)
{
    if (device == NULL) {
        return NULL;
    }

    layer_data *my_data;
    // loader uses this to force layer initialization; device object is wrapped
    if (!strcmp(funcName, "vkGetDeviceProcAddr")) {
        VkBaseLayerObject* wrapped_dev = (VkBaseLayerObject*) device;
        my_data = get_my_data_ptr(get_dispatch_key(wrapped_dev->baseObject), layer_data_map);
        my_data->device_dispatch_table = new VkLayerDispatchTable;
        layer_initialize_dispatch_table(my_data->device_dispatch_table, wrapped_dev);
        return (PFN_vkVoidFunction) vkGetDeviceProcAddr;
    }

    my_data = get_my_data_ptr(get_dispatch_key(device), layer_data_map);
    if (!strcmp(funcName, "vkCreateDevice"))
        return (PFN_vkVoidFunction) vkCreateDevice;
    if (!strcmp(funcName, "vkDestroyDevice"))
        return (PFN_vkVoidFunction) vkDestroyDevice;
    if (!strcmp(funcName, "vkCreateImage"))
        return (PFN_vkVoidFunction) vkCreateImage;
    if (!strcmp(funcName, "vkDestroyImage"))
        return (PFN_vkVoidFunction) vkDestroyImage;
    if (!strcmp(funcName, "vkCreateImageView"))
        return (PFN_vkVoidFunction) vkCreateImageView;
    if (!strcmp(funcName, "vkCreateRenderPass"))
        return (PFN_vkVoidFunction) vkCreateRenderPass;
    if (!strcmp(funcName, "vkCmdClearColorImage"))
        return (PFN_vkVoidFunction) vkCmdClearColorImage;
    if (!strcmp(funcName, "vkCmdClearDepthStencilImage"))
        return (PFN_vkVoidFunction) vkCmdClearDepthStencilImage;
    if (!strcmp(funcName, "vkCmdClearAttachments"))
        return (PFN_vkVoidFunction) vkCmdClearAttachments;
    if (!strcmp(funcName, "vkCmdCopyImage"))
        return (PFN_vkVoidFunction) vkCmdCopyImage;
    if (!strcmp(funcName, "vkCmdCopyImageToBuffer"))
        return (PFN_vkVoidFunction) vkCmdCopyImageToBuffer;
    if (!strcmp(funcName, "vkCmdCopyBufferToImage"))
        return (PFN_vkVoidFunction) vkCmdCopyBufferToImage;
    if (!strcmp(funcName, "vkCmdBlitImage"))
        return (PFN_vkVoidFunction) vkCmdBlitImage;
    if (!strcmp(funcName, "vkCmdPipelineBarrier"))
        return (PFN_vkVoidFunction) vkCmdPipelineBarrier;
    if (!strcmp(funcName, "vkCmdResolveImage"))
        return (PFN_vkVoidFunction) vkCmdResolveImage;
    if (!strcmp(funcName, "vkGetImageSubresourceLayout"))
        return (PFN_vkVoidFunction) vkGetImageSubresourceLayout;

    VkLayerDispatchTable* pTable = my_data->device_dispatch_table;
    {
        if (pTable->GetDeviceProcAddr == NULL)
            return NULL;
        return pTable->GetDeviceProcAddr(device, funcName);
    }
}

VK_LAYER_EXPORT VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vkGetInstanceProcAddr(VkInstance instance, const char* funcName)
{
    if (instance == NULL) {
        return NULL;
    }

    layer_data *my_data;
    // loader uses this to force layer initialization; instance object is wrapped
    if (!strcmp(funcName, "vkGetInstanceProcAddr")) {
        VkBaseLayerObject* wrapped_inst = (VkBaseLayerObject*) instance;
        my_data = get_my_data_ptr(get_dispatch_key(wrapped_inst->baseObject), layer_data_map);
        my_data->instance_dispatch_table = new VkLayerInstanceDispatchTable;
        layer_init_instance_dispatch_table(my_data->instance_dispatch_table, wrapped_inst);
        return (PFN_vkVoidFunction) vkGetInstanceProcAddr;
    }

    my_data = get_my_data_ptr(get_dispatch_key(instance), layer_data_map);
    if (!strcmp(funcName, "vkCreateInstance"))
        return (PFN_vkVoidFunction) vkCreateInstance;
    if (!strcmp(funcName, "vkDestroyInstance"))
        return (PFN_vkVoidFunction) vkDestroyInstance;
    if (!strcmp(funcName, "vkEnumerateInstanceLayerProperties"))
        return (PFN_vkVoidFunction) vkEnumerateInstanceLayerProperties;
    if (!strcmp(funcName, "vkEnumerateInstanceExtensionProperties"))
        return (PFN_vkVoidFunction) vkEnumerateInstanceExtensionProperties;
    if (!strcmp(funcName, "vkEnumerateDeviceLayerProperties"))
        return (PFN_vkVoidFunction) vkEnumerateDeviceLayerProperties;
    if (!strcmp(funcName, "vkEnumerateDeviceExtensionProperties"))
        return (PFN_vkVoidFunction) vkEnumerateDeviceExtensionProperties;
    if (!strcmp(funcName, "vkGetPhysicalDeviceProperties"))
        return (PFN_vkVoidFunction) vkGetPhysicalDeviceProperties;

    PFN_vkVoidFunction fptr = debug_report_get_instance_proc_addr(my_data->report_data, funcName);
    if(fptr)
        return fptr;

    {
        VkLayerInstanceDispatchTable* pTable = my_data->instance_dispatch_table;
        if (pTable->GetInstanceProcAddr == NULL)
            return NULL;
        return pTable->GetInstanceProcAddr(instance, funcName);
    }
}