Visual Studio 2022 搭建GLFW OpenGL开发环境

最近工作需要 需要写一个全景的视频播放器

网上搜了下大概解决方案是 ffmpeg+opengl

b站有很多视频  按照视频 搭建了OpenGL的开发环境

先去GLFW的网站下载 windows平台的库文件

为什么使用GLFW  因为GLFW是跨平台的   我下的是64位版本解压后有目录如下

 包含了动态库和静态库 这里我们使用静态库 mt那个是multithread 多线程版本的

An OpenGL library | GLFW

打开VS 新建一个控制台的新项目

添加一个main.cpp文件

添加以下代码

#include "glfw3.h"

int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);

    /* Loop until the user closes the window */
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);
        glBegin(GL_TRIANGLES);

        glVertex2f(-0.5f,-0.5f);
        glVertex2f(0.0f, 0.5f);
        glVertex2f(0.5f, -0.5f);
        
        glEnd();


        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

项目工程目录

 工作目录添加了一个3rd的目录用来存放第三方的库这里使用的是静态库glfw3.lib

设置工程属性 添加头文件目录 C/C++ 常规

 添加lib库目录 如下 链接器常规那里

 设置lib库文件名 这里主要是glfw3.lib 和 opengl32.lib

F5 直接编译运行  出来如下三角形窗口 到此opengl的环境就搭建好了

后来看到教程又说 上面的方法调用的opengl是比较老的版本  需要用到一个glew或者glad的东西来 用

去这里下载glew 直接选择编译好的二进制版本

The OpenGL Extension Wrangler Library download | SourceForge.net

解压过后如下图

还是使用静态库

引入头文件  之后的步骤和之前一致  修改下代码

#include "glew.h"
#include "glfw3.h"


#include   <iostream>

int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;

 

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);

    if (glewInit() != GLEW_OK)
    {
        std::cout << "glewInit failed" << std::endl;
    }


    std::cout << glGetString(GL_VERSION);
     

    /* Loop until the user closes the window */
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);
        glBegin(GL_TRIANGLES);

        glVertex2f(-0.5f,-0.5f);
        glVertex2f(0.0f, 0.5f);
        glVertex2f(0.5f, -0.5f);
        
        glEnd();


        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

但是我试了 不管 加不加glew  打印的版本都是 如下

20230509 更新增加GLAD内容

根据中文的文档内容

创建窗口 - LearnOpenGL CN (learnopengl-cn.github.io)

进入GLAD官网

https://glad.dav1d.de

 我选择最新的4.6版本 opengl core模式

点击Generate之后  生成了一个zip包 下载这个压缩包

新建一个空的项目 

添加对应的文件 和 依赖项 之后  main.cpp改成如下代码

#include "glad/glad.h"
#include "glfw3.h"

void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void processInput(GLFWwindow* window);

// settings
const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;

int main()
{
    // glfw: initialize and configure
    // ------------------------------
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

#ifdef __APPLE__
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif

    // glfw window creation
    // --------------------
    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

    // glad: load all OpenGL function pointers
    // ---------------------------------------
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
    {
        std::cout << "Failed to initialize GLAD" << std::endl;
        return -1;
    }

    // render loop
    // -----------
    while (!glfwWindowShouldClose(window))
    {
        // input
        // -----
        processInput(window);

        // render
        // ------
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
        // -------------------------------------------------------------------------------
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    // glfw: terminate, clearing all previously allocated GLFW resources.
    // ------------------------------------------------------------------
    glfwTerminate();
    return 0;
}

// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
// ---------------------------------------------------------------------------------------------------------
void processInput(GLFWwindow* window)
{
    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
        glfwSetWindowShouldClose(window, true);
}

// glfw: whenever the window size changed (by OS or user resize) this callback function executes
// ---------------------------------------------------------------------------------------------
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    // make sure the viewport matches the new window dimensions; note that width and 
    // height will be significantly larger than specified on retina displays.
    glViewport(0, 0, width, height);
}

能够正常显示如下窗口了