问Vulkan图像输出句柄到Win32或fd。如何反转win32句柄来获取图像信息？

EN

// Get the Vulkan texture and create the OpenGL equivalent using the memory allocated in Vulkan
inline void createTextureGL(nvvk::ResourceAllocator& alloc, Texture2DVkGL& texGl, int format, int minFilter, int magFilter, int wraps, int wrapt)
{
    vk::Device                  device = alloc.getDevice();
    nvvk::MemAllocator::MemInfo info = alloc.getMemoryAllocator()->getMemoryInfo(texGl.texVk.memHandle);

    texGl.handle = device.getMemoryWin32HandleKHR({ info.memory, vk::ExternalMemoryHandleTypeFlagBits::eOpaqueWin32 });

    auto req = device.getImageMemoryRequirements(texGl.texVk.image);

    glCreateMemoryObjectsEXT(1, &texGl.memoryObject);

    glImportMemoryWin32HandleEXT(texGl.memoryObject, req.size, GL_HANDLE_TYPE_OPAQUE_WIN32_EXT, texGl.handle);

    glCreateTextures(GL_TEXTURE_2D, 1, &texGl.oglId);
    glTextureStorageMem2DEXT(texGl.oglId, texGl.mipLevels, format, texGl.imgSize.width, texGl.imgSize.height, texGl.memoryObject, info.offset);

    ::VkImage image = *images_[0];

    VkMemoryRequirements requirements;
    device_->vkGetImageMemoryRequirements(device_, image, &requirements);

    aligned_data_size_ =
        vulkan::RoundUp(requirements.size, requirements.alignment);

    uint32_t memory_index =
        vulkan::GetMemoryIndex(&device, log, requirements.memoryTypeBits,
                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);

#ifdef _WIN32
    VkImportMemoryWin32HandleInfoKHR import_allocate_info{
        VK_STRUCTURE_TYPE_IMPORT_MEMORY_WIN32_HANDLE_INFO_KHR, nullptr,
        VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT, handle, nullptr};
#elif __linux__
    VkImportMemoryFdInfoKHR import_allocate_info{
        VK_STRUCTURE_TYPE_IMPORT_MEMORY_FD_INFO_KHR, nullptr,
        VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT, fd};
#endif

    VkMemoryAllocateInfo allocate_info{
        VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,  // sType
        &import_allocate_info,                   // pNext
        aligned_data_size_ * num_images,         // allocationSize
        memory_index};

    VkDeviceMemory device_memory;

    LOG_ASSERT(==, log, VK_SUCCESS,
               device->vkAllocateMemory(device, &allocate_info, nullptr,
                                        &device_memory));