福爾康和GLFW - glfwVulkanSupported（）總是返回false

我試圖用GLFW3.2運行基本福爾康測試：福爾康和GLFW - glfwVulkanSupported（）總是返回false

#include <vulkan/vulkan.h> 
#include <GLFW/glfw3.h> 

#include <iostream> 

int main(int argc, char *argv[]) 
{ 
    if (glfwVulkanSupported()) 
    { 
     std::cout << "vulkan supported !" << std::endl; 

    } 
    else 
    { 
     std::cout << "vulkan NOT supported !" << std::endl; 

    } 
    return 0; 
}

我所要建造使用下面的cmake：

cmake_minimum_required(VERSION 3.5.1) 
project(vktest) 

set (CMAKE_CXX_STANDARD 11) 
set(CMAKE_CXX_COMPILER "/usr/bin/g++-4.9") 

set(CMAKE_EXPORT_COMPILE_COMMANDS ON) 
set(CMAKE_INCLUDE_CURRENT_DIR ON) 

find_package(Vulkan REQUIRED) 
find_package(glfw3 3.2 REQUIRED) 
include_directories(${Vulkan_INCLUDE_DIRS}) 

message("kek") 
message(${Vulkan_INCLUDE_DIRS}) 
message(${Vulkan_LIBRARIES}) 
message(${Vulkan_LIBRARY}) 

add_executable(vktest vulkanTest.cpp) 

target_link_libraries(vktest ${Vulkan_LIBRARIES}) 
target_link_libraries(vktest glfw)

建設這個作品很好。

但是，當我運行程序，我總是得到在else語句。

我安裝nvidia的最後一個驅動程序，lunarg的福爾康SDK具有以下環境變量：

export VULKAN_SDK=/home/mathias/vulkan/VulkanSDK/1.0.42.2/x86_64 
set PATH $VULKAN_SDK/bin $PATH 
set LD_LIBRARY_PATH $VULKAN_SDK/lib $LD_LIBRARY_PATH 
set VK_LAYER_PATH $VULKAN_SDK/etc/explicit_layer.d

而且我可以運行立方體的例子。

任何想法，爲什麼它永遠不會返回true？

來源

2017-04-01 Mathias

Your code is missing #define GLFW_INCLUDE_VULKAN，does not it？

#define GLFW_INCLUDE_VULKAN //as required by GLFW 
#include "vulkan\vk_cpp.hpp" 
#include "GLFW\glfw3.h" 
#include <iostream> 
#include <algorithm> 
#include <iterator> 

int main() 
{ 
    if (!glfwInit()) //Initialize GLFW 
    { 
     std::cout << "GLFW not initialized.\n"; 
     abort(); 
    } 
    if (!glfwVulkanSupported()) //Any Vulkan-related function requires GLFW initialized 
    { 
     std::cout << "Vulkan not supported.\n"; 
     abort(); 
    } 
    uint32_t ext_count; // an output placeholder 
    auto ext_list = glfwGetRequiredInstanceExtensions(&ext_count); 

    std::copy(&ext_list[0], &ext_list[ext_count-1], std::ostream_iterator<const char *>(cout, "\n")); 

    //feed extension list into InstanceCreateInfo struct in prepare for Vulkan instance creation 
    vk::InstanceCreateInfo ifo{ vk::InstanceCreateFlags(), nullptr, 0, nullptr, ext_count, ext_list }; 
    glfwDefaultWindowHints(); 
    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API); // Comment out this if you need OpenGL also 
    GLFWwindow* hWnd = glfwCreateWindow(640, 480, "Foobar", NULL, NULL); // The usual window 
    auto inst = vk::createInstance(ifo); // Vulkan instance creation 
    vk::SurfaceKHR surf{}; 
    auto psurf = VkSurfaceKHR(surf); // you can cast vk::* object to Vk* using a type cast 
    auto r = glfwCreateWindowSurface(VkInstance(inst), hWnd, NULL, &psurf); //VK_SUCCESS is somehow...0 
    // Draw stuff here 

    // Finish drawing 
    vkDestroySurfaceKHR((VkInstance)inst, VkSurfaceKHR(surf), nullptr);//vkcpp seems have no destructor for surface object 
    glfwDestroyWindow(hWnd); //Destroy the surface before the window 
    glfwTerminate(); // Free GLFW resource 
    return 0; 
}

如果在這段代碼免費進行修復錯別字。我無法在當前位置對其進行編譯

來源

2017-04-01 09:56:19 Swift

glfw文檔告訴要麼像您那樣定義宏，要麼在glfw頭之前包含vulkan頭。出於某種原因，我第一次嘗試第二個，但只定義宏似乎工作。所以這對我來說都很好，謝謝！ – Mathias

@Mathias可能會根據實現情況而定。此API非常年輕，可能有需要解決方法的版本。同樣，在較舊的VIsual Studio庫中，爲了使字符串正確地與iostream一起工作，其中一個在標頭之後包含 ..已修復。我使用了Khronos的老項目vulkan-hpp頭文件，這可能是當時唯一的方法。 – Swift

福爾康和GLFW - glfwVulkanSupported（）總是返回false

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