GLFW+GLEW搭建opengl环境（备忘）

使用VS2017社区版本（免费版）

下载GLFW和GLEW源码。

使用CMAKE生成工程文件

打开右击GLFW和GLEW项目编译

GLFW默认是静态库

编译GLEW时调整为静态库。将生成的lib和源码中的include文件夹放好，新建空的C++项目。在项目属性设置好路径。

opengl32.lib包含在window sdk 10中了。不需要单独编译。

 

为了支持中文需要使用UTF-8无bom编码。测试代码如下。

#include <iostream>    
// GLEW    
#define GLEW_STATIC    
#include <GL/glew.h>    
#include <Windows.h>
// GLFW    
#include <GLFW/glfw3.h>    
#pragma comment(lib,"winmm.lib") // 告诉连接器与这个库连接，因为我们要播放多媒体声音 
#pragma comment(linker, "/subsystem:"windows" /entry:"mainCRTStartup"" )
//#define DEBUG
// Function prototypes    
void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode);

// Window dimensions    
const GLuint WIDTH = 800, HEIGHT = 600;

// The MAIN function, from here we start the application and run the game loop
//#ifdef DEBUG
//int main()
//#else
//int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
//#endif
int main()
{
    std::cout << "Starting GLFW context, OpenGL 3.3" << std::endl;
    // Init GLFW    
    glfwInit();
    // Set all the required options for GLFW    
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);

    // Create a GLFWwindow object that we can use for GLFW's functions    
    GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT,"墨迹",nullptr, nullptr);
    if (window == nullptr)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    // Set the required callback functions    
    glfwSetKeyCallback(window, key_callback);
    // Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions    
    glewExperimental = GL_TRUE;
    // Initialize GLEW to setup the OpenGL Function pointers    
    if (glewInit() != GLEW_OK)
    {
        std::cout << "Failed to initialize GLEW" << std::endl;
        return -1;
    }

    // Define the viewport dimensions    
    glViewport(0, 0, WIDTH, HEIGHT);

    // Game loop    
    while (!glfwWindowShouldClose(window))
    {
        // Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions    
        glfwPollEvents();

        // Render    
        // Clear the colorbuffer    
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        // Swap the screen buffers    
        glfwSwapBuffers(window);
        Sleep(20);
    }

    // Terminate GLFW, clearing any resources allocated by GLFW.    
    glfwTerminate();
    return 0;
}

// Is called whenever a key is pressed/released via GLFW    
void key_callback(GLFWwindow* window, int key, int scancode, int action, int mode)
{
    std::cout << key << std::endl;
    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
        glfwSetWindowShouldClose(window, GL_TRUE);
}

效果如下

程序400kb，无需动态库。

单独一个程序的话会比动态库要小。