Merge pull request #442 from Agrael1/master

[WIP] Win32 Handle extension

Doxyfile

@@ -2466,6 +2466,7 @@ PREDEFINED             = VMA_CALL_PRE= \
                          VMA_MEMORY_PRIORITY=1 \
                          VMA_KHR_MAINTENANCE4=1 \
                          VMA_KHR_MAINTENANCE5=1 \
+                         VMA_EXTERNAL_MEMORY_WIN32=1 \
                          VMA_EXTERNAL_MEMORY=1 \
                          VMA_EXTENDS_VK_STRUCT= \
                          VMA_STATS_STRING_ENABLED=1

include/vk_mem_alloc.h

@@ -242,6 +242,15 @@ extern "C" {
     #endif
 #endif
 
+// Defined to 1 when VK_KHR_external_memory_win32 device extension is defined in Vulkan headers.
+#if !defined(VMA_EXTERNAL_MEMORY_WIN32)
+    #if VK_KHR_external_memory_win32
+        #define VMA_EXTERNAL_MEMORY_WIN32 1
+    #else
+        #define VMA_EXTERNAL_MEMORY_WIN32 0
+    #endif
+#endif
+
 // Define these macros to decorate all public functions with additional code,
 // before and after returned type, appropriately. This may be useful for
 // exporting the functions when compiling VMA as a separate library. Example:
@@ -461,6 +470,14 @@ typedef enum VmaAllocatorCreateFlagBits
     */
     VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT = 0x00000100,
 
+    /**
+    Enables usage of VK_KHR_external_memory_win32 extension in the library.
+
+    You should set this flag if you found available and enabled this device extension,
+    while creating Vulkan device passed as VmaAllocatorCreateInfo::device.
+    */
+    VMA_ALLOCATOR_CREATE_KHR_EXTERNAL_MEMORY_WIN32_BIT = 0x00000200,
+
     VMA_ALLOCATOR_CREATE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF
 } VmaAllocatorCreateFlagBits;
 /// See #VmaAllocatorCreateFlagBits.
@@ -1035,6 +1052,11 @@ typedef struct VmaVulkanFunctions
     /// Fetch from "vkGetDeviceImageMemoryRequirements" on Vulkan >= 1.3, but you can also fetch it from "vkGetDeviceImageMemoryRequirementsKHR" if you enabled extension VK_KHR_maintenance4.
     PFN_vkGetDeviceImageMemoryRequirementsKHR VMA_NULLABLE vkGetDeviceImageMemoryRequirements;
 #endif
+#ifdef VMA_EXTERNAL_MEMORY_WIN32
+    PFN_vkGetMemoryWin32HandleKHR VMA_NULLABLE vkGetMemoryWin32HandleKHR;
+#else
+    void* VMA_NULLABLE vkGetMemoryWin32HandleKHR;
+#endif
 } VmaVulkanFunctions;
 
 /// Description of a Allocator to be created.
@@ -2052,6 +2074,21 @@ VMA_CALL_PRE void VMA_CALL_POST vmaGetAllocationMemoryProperties(
     VmaAllocation VMA_NOT_NULL allocation,
     VkMemoryPropertyFlags* VMA_NOT_NULL pFlags);
 
+
+#if VMA_EXTERNAL_MEMORY_WIN32
+/**
+\brief Given an allocation, returns Win32 Handle, that may be imported by other processes or APIs.
+
+`hTargetProcess` must be a valid handle to target process or NULL. If it's `NULL`, the function returns
+handle for the current process.
+
+If the allocation was created with `VMA_ALLOCATION_CREATE_EXPORT_WIN32_HANDLE_BIT` flag,
+the function fills `pHandle` with handle that can be used in target process.
+*/
+VMA_CALL_PRE VkResult VMA_CALL_POST vmaGetMemoryWin32HandleKHR(VmaAllocator VMA_NOT_NULL allocator,
+    VmaAllocation VMA_NOT_NULL allocation, HANDLE hTargetProcess, HANDLE* VMA_NOT_NULL pHandle);
+#endif // VMA_EXTERNAL_MEMORY_WIN32
+
 /** \brief Maps memory represented by given allocation and returns pointer to it.
 
 Maps memory represented by given allocation to make it accessible to CPU code.
@@ -6069,6 +6106,84 @@ private:
 
 #endif // _VMA_MAPPING_HYSTERESIS
 
+#if VMA_EXTERNAL_MEMORY_WIN32
+class VmaWin32Handle
+{
+public:
+    VmaWin32Handle() noexcept : m_hHandle(VMA_NULL) { }
+    explicit VmaWin32Handle(HANDLE hHandle) noexcept : m_hHandle(hHandle) { }
+    ~VmaWin32Handle() noexcept { if (m_hHandle != VMA_NULL) { ::CloseHandle(m_hHandle); } }
+    VMA_CLASS_NO_COPY_NO_MOVE(VmaWin32Handle)
+
+public:
+    // Strengthened
+    VkResult GetHandle(VkDevice device, VkDeviceMemory memory, decltype(&vkGetMemoryWin32HandleKHR) pvkGetMemoryWin32HandleKHR, HANDLE hTargetProcess, bool useMutex, HANDLE* pHandle) noexcept
+    {
+        *pHandle = VMA_NULL;
+        // Try to get handle first.
+        if (m_hHandle != VMA_NULL)
+        {
+            *pHandle = Duplicate(hTargetProcess);
+            return VK_SUCCESS;
+        }
+
+        VkResult res = VK_SUCCESS;
+        // If failed, try to create it.
+        {
+            VmaMutexLockWrite lock(m_Mutex, useMutex);
+            if (m_hHandle == VMA_NULL)
+            {
+                res = Create(device, memory, pvkGetMemoryWin32HandleKHR, &m_hHandle);
+            }
+        }
+
+        *pHandle = Duplicate(hTargetProcess);
+        return res;
+    }
+
+    operator bool() const noexcept { return m_hHandle != VMA_NULL; }
+private:
+    // Not atomic
+    static VkResult Create(VkDevice device, VkDeviceMemory memory, decltype(&vkGetMemoryWin32HandleKHR) pvkGetMemoryWin32HandleKHR, HANDLE* pHandle) noexcept
+    {
+        VkResult res = VK_ERROR_FEATURE_NOT_PRESENT;
+        if (pvkGetMemoryWin32HandleKHR != VMA_NULL)
+        {
+            VkMemoryGetWin32HandleInfoKHR handleInfo{ };
+            handleInfo.sType = VK_STRUCTURE_TYPE_MEMORY_GET_WIN32_HANDLE_INFO_KHR;
+            handleInfo.memory = memory;
+            handleInfo.handleType = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT_KHR;
+            res = pvkGetMemoryWin32HandleKHR(device, &handleInfo, pHandle);
+        }
+        return res;
+    }
+    HANDLE Duplicate(HANDLE hTargetProcess = VMA_NULL) const noexcept
+    {
+        if (!m_hHandle)
+            return m_hHandle;
+
+        HANDLE hCurrentProcess = ::GetCurrentProcess();
+        HANDLE hDupHandle = VMA_NULL;
+        if (!::DuplicateHandle(hCurrentProcess, m_hHandle, hTargetProcess ? hTargetProcess : hCurrentProcess, &hDupHandle, 0, FALSE, DUPLICATE_SAME_ACCESS))
+        {
+            VMA_ASSERT(0 && "Failed to duplicate handle.");
+        }
+        return hDupHandle;
+    }
+private:
+    HANDLE m_hHandle;
+    VMA_RW_MUTEX m_Mutex; // Protects access m_Handle
+};
+#else 
+class VmaWin32Handle
+{
+    // ABI compatibility
+    void* placeholder = VMA_NULL;
+    VMA_RW_MUTEX placeholder2;
+};
+#endif // VMA_EXTERNAL_MEMORY_WIN32
+
+
 #ifndef _VMA_DEVICE_MEMORY_BLOCK
 /*
 Represents a single block of device memory (`VkDeviceMemory`) with all the
@@ -6135,7 +6250,13 @@ public:
         VkDeviceSize allocationLocalOffset,
         VkImage hImage,
         const void* pNext);
-
+#if VMA_EXTERNAL_MEMORY_WIN32
+    VkResult CreateWin32Handle(
+        const VmaAllocator hAllocator,
+        decltype(&vkGetMemoryWin32HandleKHR) pvkGetMemoryWin32HandleKHR,
+        HANDLE hTargetProcess,
+        HANDLE* pHandle)noexcept;
+#endif // VMA_EXTERNAL_MEMORY_WIN32
 private:
     VmaPool m_hParentPool; // VK_NULL_HANDLE if not belongs to custom pool.
     uint32_t m_MemoryTypeIndex;
@@ -6151,6 +6272,8 @@ private:
     VmaMappingHysteresis m_MappingHysteresis;
     uint32_t m_MapCount;
     void* m_pMappedData;
+
+    VmaWin32Handle m_Handle; // Win32 handle
 };
 #endif // _VMA_DEVICE_MEMORY_BLOCK
 
@@ -6236,6 +6359,10 @@ public:
     void PrintParameters(class VmaJsonWriter& json) const;
 #endif
 
+#if VMA_EXTERNAL_MEMORY_WIN32
+    VkResult GetWin32Handle(VmaAllocator hAllocator, HANDLE hTargetProcess, HANDLE* hHandle) noexcept;
+#endif // VMA_EXTERNAL_MEMORY_WIN32
+
 private:
     // Allocation out of VmaDeviceMemoryBlock.
     struct BlockAllocation
@@ -6251,6 +6378,7 @@ private:
         void* m_pMappedData; // Not null means memory is mapped.
         VmaAllocation_T* m_Prev;
         VmaAllocation_T* m_Next;
+        VmaWin32Handle m_Handle; // Win32 handle
     };
     union
     {
@@ -10071,6 +10199,7 @@ public:
     bool m_UseExtMemoryPriority;
     bool m_UseKhrMaintenance4;
     bool m_UseKhrMaintenance5;
+    bool m_UseKhrExternalMemoryWin32;
     const VkDevice m_hDevice;
     const VkInstance m_hInstance;
     const bool m_AllocationCallbacksSpecified;
@@ -10434,7 +10563,8 @@ VmaDeviceMemoryBlock::VmaDeviceMemoryBlock(VmaAllocator hAllocator)
     m_Id(0),
     m_hMemory(VK_NULL_HANDLE),
     m_MapCount(0),
-    m_pMappedData(VMA_NULL) {}
+    m_pMappedData(VMA_NULL),
+    m_Handle(VMA_NULL) {}
 
 VmaDeviceMemoryBlock::~VmaDeviceMemoryBlock()
 {
@@ -10677,6 +10807,14 @@ VkResult VmaDeviceMemoryBlock::BindImageMemory(
     VmaMutexLock lock(m_MapAndBindMutex, hAllocator->m_UseMutex);
     return hAllocator->BindVulkanImage(m_hMemory, memoryOffset, hImage, pNext);
 }
+
+#if VMA_EXTERNAL_MEMORY_WIN32
+VkResult VmaDeviceMemoryBlock::CreateWin32Handle(const VmaAllocator hAllocator, decltype(&vkGetMemoryWin32HandleKHR) pvkGetMemoryWin32HandleKHR, HANDLE hTargetProcess, HANDLE* pHandle) noexcept
+{
+    VMA_ASSERT(pHandle);
+    return m_Handle.GetHandle(hAllocator->m_hDevice, m_hMemory, pvkGetMemoryWin32HandleKHR, hTargetProcess, hAllocator->m_UseMutex, pHandle);
+}
+#endif // VMA_EXTERNAL_MEMORY_WIN32
 #endif // _VMA_DEVICE_MEMORY_BLOCK_FUNCTIONS
 
 #ifndef _VMA_ALLOCATION_T_FUNCTIONS
@@ -10977,6 +11115,23 @@ void VmaAllocation_T::PrintParameters(class VmaJsonWriter& json) const
         json.WriteString(m_pName);
     }
 }
+#if VMA_EXTERNAL_MEMORY_WIN32
+VkResult VmaAllocation_T::GetWin32Handle(VmaAllocator hAllocator, HANDLE hTargetProcess, HANDLE* pHandle) noexcept
+{
+    // Where do we get this function from?
+    auto pvkGetMemoryWin32HandleKHR = hAllocator->GetVulkanFunctions().vkGetMemoryWin32HandleKHR;
+    switch (m_Type)
+    {
+    case ALLOCATION_TYPE_BLOCK:
+        return m_BlockAllocation.m_Block->CreateWin32Handle(hAllocator, pvkGetMemoryWin32HandleKHR, hTargetProcess, pHandle);
+    case ALLOCATION_TYPE_DEDICATED:
+        return m_DedicatedAllocation.m_Handle.GetHandle(hAllocator->m_hDevice, m_DedicatedAllocation.m_hMemory, pvkGetMemoryWin32HandleKHR, hTargetProcess, hAllocator->m_UseMutex, pHandle);
+    default:
+        VMA_ASSERT(0);
+        return VK_ERROR_FEATURE_NOT_PRESENT;
+    }
+}
+#endif // VMA_EXTERNAL_MEMORY_WIN32
 #endif // VMA_STATS_STRING_ENABLED
 
 void VmaAllocation_T::FreeName(VmaAllocator hAllocator)
@@ -12707,6 +12862,7 @@ VmaAllocator_T::VmaAllocator_T(const VmaAllocatorCreateInfo* pCreateInfo) :
     m_UseExtMemoryPriority((pCreateInfo->flags & VMA_ALLOCATOR_CREATE_EXT_MEMORY_PRIORITY_BIT) != 0),
     m_UseKhrMaintenance4((pCreateInfo->flags & VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT) != 0),
     m_UseKhrMaintenance5((pCreateInfo->flags & VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT) != 0),
+    m_UseKhrExternalMemoryWin32((pCreateInfo->flags & VMA_ALLOCATOR_CREATE_KHR_EXTERNAL_MEMORY_WIN32_BIT) != 0),
     m_hDevice(pCreateInfo->device),
     m_hInstance(pCreateInfo->instance),
     m_AllocationCallbacksSpecified(pCreateInfo->pAllocationCallbacks != VMA_NULL),
@@ -12798,6 +12954,19 @@ VmaAllocator_T::VmaAllocator_T(const VmaAllocatorCreateInfo* pCreateInfo) :
         VMA_ASSERT(0 && "VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT is set but required extension is not available in your Vulkan header or its support in VMA has been disabled by a preprocessor macro.");
     }
 #endif
+#if !(VMA_KHR_MAINTENANCE5)
+    if(m_UseKhrMaintenance5)
+    {
+        VMA_ASSERT(0 && "VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT is set but required extension is not available in your Vulkan header or its support in VMA has been disabled by a preprocessor macro.");
+    }
+#endif
+
+#if !(VMA_EXTERNAL_MEMORY_WIN32)
+    if(m_UseKhrExternalMemoryWin32)
+    {
+        VMA_ASSERT(0 && "VMA_ALLOCATOR_CREATE_KHR_EXTERNAL_MEMORY_WIN32_BIT is set but required extension is not available in your Vulkan header or its support in VMA has been disabled by a preprocessor macro.");
+    }
+#endif
 
     memset(&m_DeviceMemoryCallbacks, 0 ,sizeof(m_DeviceMemoryCallbacks));
     memset(&m_PhysicalDeviceProperties, 0, sizeof(m_PhysicalDeviceProperties));
@@ -13022,7 +13191,9 @@ void VmaAllocator_T::ImportVulkanFunctions_Custom(const VmaVulkanFunctions* pVul
     VMA_COPY_IF_NOT_NULL(vkGetDeviceBufferMemoryRequirements);
     VMA_COPY_IF_NOT_NULL(vkGetDeviceImageMemoryRequirements);
 #endif
-
+#if VMA_EXTERNAL_MEMORY_WIN32
+    VMA_COPY_IF_NOT_NULL(vkGetMemoryWin32HandleKHR);
+#endif
 #undef VMA_COPY_IF_NOT_NULL
 }
 
@@ -13124,7 +13295,12 @@ void VmaAllocator_T::ImportVulkanFunctions_Dynamic()
         VMA_FETCH_DEVICE_FUNC(vkGetDeviceImageMemoryRequirements, PFN_vkGetDeviceImageMemoryRequirementsKHR, "vkGetDeviceImageMemoryRequirementsKHR");
     }
 #endif
-
+#if VMA_EXTERNAL_MEMORY_WIN32
+    if (m_UseKhrExternalMemoryWin32)
+    {
+        VMA_FETCH_DEVICE_FUNC(vkGetMemoryWin32HandleKHR, PFN_vkGetMemoryWin32HandleKHR, "vkGetMemoryWin32HandleKHR");
+    }
+#endif
 #undef VMA_FETCH_DEVICE_FUNC
 #undef VMA_FETCH_INSTANCE_FUNC
 }
@@ -13173,6 +13349,12 @@ void VmaAllocator_T::ValidateVulkanFunctions()
         VMA_ASSERT(m_VulkanFunctions.vkGetPhysicalDeviceMemoryProperties2KHR != VMA_NULL);
     }
 #endif
+#if VMA_EXTERNAL_MEMORY_WIN32
+    if (m_UseKhrExternalMemoryWin32)
+    {
+        VMA_ASSERT(m_VulkanFunctions.vkGetMemoryWin32HandleKHR != VMA_NULL);
+    }
+#endif
 
     // Not validating these due to suspected driver bugs with these function
     // pointers being null despite correct extension or Vulkan version is enabled.
@@ -16429,6 +16611,15 @@ VMA_CALL_PRE void VMA_CALL_POST vmaFreeVirtualBlockStatsString(VmaVirtualBlock V
         VmaFreeString(virtualBlock->GetAllocationCallbacks(), pStatsString);
     }
 }
+#if VMA_EXTERNAL_MEMORY_WIN32
+VMA_CALL_PRE VkResult VMA_CALL_POST vmaGetMemoryWin32HandleKHR(VmaAllocator VMA_NOT_NULL allocator,
+    VmaAllocation VMA_NOT_NULL allocation, HANDLE hTargetProcess, HANDLE* VMA_NOT_NULL pHandle)
+{
+    VMA_ASSERT(allocator && allocation);
+    VMA_DEBUG_GLOBAL_MUTEX_LOCK;
+    return allocation->GetWin32Handle(allocator, hTargetProcess, pHandle);
+}
+#endif // VMA_EXTERNAL_MEMORY_WIN32 
 #endif // VMA_STATS_STRING_ENABLED
 #endif // _VMA_PUBLIC_INTERFACE
 #endif // VMA_IMPLEMENTATION

src/Shaders/CMakeLists.txt

@@ -17,14 +17,22 @@ foreach(SHADER ${SHADERS})
     get_filename_component(FILE_NAME ${SHADER} NAME)
     
     # Put the .spv files into the bin folder
+    set(SPIRV_BIN ${CMAKE_CURRENT_BINARY_DIR}/${FILE_NAME}.spv)
     set(SPIRV ${PROJECT_SOURCE_DIR}/bin/${FILE_NAME}.spv)
 
+
     add_custom_command(
         OUTPUT ${SPIRV}
         # Use the same file name and append .spv to the compiled shader
         COMMAND ${GLSL_VALIDATOR} -V ${CMAKE_CURRENT_SOURCE_DIR}/${SHADER} -o ${SPIRV}
         DEPENDS ${SHADER}
     )
+    add_custom_command(
+        OUTPUT ${SPIRV_BIN}
+        # Use the same file name and append .spv to the compiled shader
+        COMMAND ${GLSL_VALIDATOR} -V ${CMAKE_CURRENT_SOURCE_DIR}/${SHADER} -o ${SPIRV_BIN}
+        DEPENDS ${SHADER}
+    )
 
     list(APPEND SPIRV_FILES ${SPIRV})
 endforeach()

src/Tests.cpp

@@ -8253,6 +8253,71 @@ static void TestMappingHysteresis()
     }
 }
 
+
+static void TestWin32Handles()
+{
+#if VMA_EXTERNAL_MEMORY_WIN32
+    wprintf(L"Test Win32 handles\n");
+    constexpr static VkExportMemoryAllocateInfoKHR exportInfo{
+        VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO_KHR,
+        nullptr,
+        VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT
+    };
+    constexpr static VkExternalMemoryBufferCreateInfoKHR externalInfo{
+        VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO_KHR,
+        nullptr,
+        VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT
+    };
+
+    VkBufferCreateInfo sampleBufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
+    sampleBufCreateInfo.size = 0x1000; // Doesn't matter.
+    sampleBufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
+    sampleBufCreateInfo.pNext = &externalInfo;
+
+    VmaAllocationCreateInfo sampleAllocCreateInfo = {};
+    sampleAllocCreateInfo.usage = VMA_MEMORY_USAGE_AUTO;
+    sampleAllocCreateInfo.flags = VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT;
+
+    uint32_t memTypeIndex;
+    TEST(vmaFindMemoryTypeIndexForBufferInfo(g_hAllocator,
+        &sampleBufCreateInfo, &sampleAllocCreateInfo, &memTypeIndex) == VK_SUCCESS);
+    // Check res...
+
+
+    // Create a pool that can have at most 2 blocks, 128 MiB each.
+    VmaPoolCreateInfo poolCreateInfo = {};
+    poolCreateInfo.memoryTypeIndex = memTypeIndex;
+    poolCreateInfo.blockSize = 128ull * 1024 * 1024;
+    poolCreateInfo.maxBlockCount = 2;
+    poolCreateInfo.pMemoryAllocateNext = (void*)&exportInfo;
+
+
+    VmaPool pool;
+    TEST(vmaCreatePool(g_hAllocator, &poolCreateInfo, &pool) == VK_SUCCESS);
+
+
+    sampleAllocCreateInfo.pool = pool;
+
+    VkBuffer buf;
+    VmaAllocation alloc;
+    VmaAllocationInfo allocInfo;
+    TEST(vmaCreateBuffer(g_hAllocator, &sampleBufCreateInfo, &sampleAllocCreateInfo, &buf, &alloc, &allocInfo) == VK_SUCCESS);
+    HANDLE handle;
+    HANDLE handle2;
+    TEST(vmaGetMemoryWin32HandleKHR(g_hAllocator, alloc, nullptr, &handle) == VK_SUCCESS);
+    TEST(handle != nullptr);
+    TEST(vmaGetMemoryWin32HandleKHR(g_hAllocator, alloc, nullptr, &handle2) == VK_SUCCESS);
+    TEST(handle2 != nullptr);
+    TEST(handle2 != handle);
+
+    vmaDestroyBuffer(g_hAllocator, buf, alloc);
+    TEST(CloseHandle(handle));
+    TEST(CloseHandle(handle2));
+
+    vmaDestroyPool(g_hAllocator, pool);
+#endif
+}
+
 void Test()
 {
     wprintf(L"TESTING:\n");
@@ -8295,6 +8360,7 @@ void Test()
     TestMappingHysteresis();
     TestDeviceLocalMapped();
     TestMaintenance5();
+    TestWin32Handles();
     TestMappingMultithreaded();
     TestLinearAllocator();
     ManuallyTestLinearAllocator();

src/VulkanSample.cpp

@@ -32,7 +32,7 @@
 
 #pragma comment(lib, "shlwapi.lib")
 
-static const char* const SHADER_PATH1 = "./";
+static const char* const SHADER_PATH1 = "./Shaders/";
 static const char* const SHADER_PATH2 = "../bin/";
 static const wchar_t* const WINDOW_CLASS_NAME = L"VULKAN_MEMORY_ALLOCATOR_SAMPLE";
 static const char* const VALIDATION_LAYER_NAME = "VK_LAYER_KHRONOS_validation";
@@ -69,6 +69,7 @@ bool VK_KHR_buffer_device_address_enabled = false;
 bool VK_EXT_memory_priority_enabled = false;
 bool VK_EXT_debug_utils_enabled = false;
 bool VK_KHR_maintenance5_enabled = false;
+bool VK_KHR_external_memory_win32_enabled = false;
 bool g_SparseBindingEnabled = false;
 
 // # Pointers to functions from extensions
@@ -1449,6 +1450,7 @@ static void PrintEnabledFeatures()
     }
     wprintf(L"VK_EXT_memory_priority: %d\n", VK_EXT_memory_priority_enabled ? 1 : 0);
     wprintf(L"VK_KHR_maintenance5: %d\n", VK_KHR_maintenance5_enabled? 1 : 0);
+    wprintf(L"VK_KHR_external_memory_win32: %d\n", VK_KHR_external_memory_win32_enabled ? 1 : 0);
 }
 
 void SetAllocatorCreateInfo(VmaAllocatorCreateInfo& outInfo)
@@ -1494,6 +1496,11 @@ void SetAllocatorCreateInfo(VmaAllocatorCreateInfo& outInfo)
         outInfo.flags |= VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT;
     }
 
+    if(VK_KHR_external_memory_win32_enabled)
+    {
+        outInfo.flags |= VMA_ALLOCATOR_CREATE_KHR_EXTERNAL_MEMORY_WIN32_BIT;
+    }
+
     if(USE_CUSTOM_CPU_ALLOCATION_CALLBACKS)
     {
         outInfo.pAllocationCallbacks = &g_CpuAllocationCallbacks;
@@ -1876,6 +1883,8 @@ static void InitializeApplication()
             VK_EXT_memory_priority_enabled = true;
         else if(strcmp(physicalDeviceExtensionProperties[i].extensionName, VK_KHR_MAINTENANCE_5_EXTENSION_NAME) == 0)
             VK_KHR_maintenance5_enabled = true;
+        else if (strcmp(physicalDeviceExtensionProperties[i].extensionName, VK_KHR_EXTERNAL_MEMORY_WIN32_EXTENSION_NAME) == 0)
+            VK_KHR_external_memory_win32_enabled = VMA_DYNAMIC_VULKAN_FUNCTIONS;
     }
 
     if(GetVulkanApiVersion() >= VK_API_VERSION_1_2)
@@ -2036,6 +2045,8 @@ static void InitializeApplication()
         enabledDeviceExtensions.push_back(VK_EXT_MEMORY_PRIORITY_EXTENSION_NAME);
     if(VK_KHR_maintenance5_enabled)
         enabledDeviceExtensions.push_back(VK_KHR_MAINTENANCE_5_EXTENSION_NAME);
+    if (VK_KHR_external_memory_win32_enabled)
+        enabledDeviceExtensions.push_back(VK_KHR_EXTERNAL_MEMORY_WIN32_EXTENSION_NAME);
 
     VkPhysicalDeviceFeatures2 deviceFeatures = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2 };
     deviceFeatures.features.samplerAnisotropy = VK_TRUE;