OpenGL学习（1）—— 测试OpenGL环境是否搭建成功

一个用来验证OpenGL(glfw + glad)环境是否搭建成功的测试代码

内容为生成一个小窗口

#include <glad/glad.h>

#include <GLFW/glfw3.h>

#include <stdio.h>

// settings

const unsigned int SCR_WIDTH = 800;

const unsigned int SCR_HEIGHT = 600;

void processInput(GLFWwindow *window)

{

	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)

	{

		//将窗口设置为关闭，跳出循环

		glfwSetWindowShouldClose(window, true);

	}

}

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

{

	glViewport(0, 0, width, height);

}

int main()

{

	//glfw初始化

	glfwInit();

	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);

	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);

	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

	//glfw创建窗口

	GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);

	if (window == NULL)

	{

		printf("创建窗口失败");

		//终止

		glfwTerminate();

		return -1;

	}

	//显示窗口

	glfwMakeContextCurrent(window);

	//设置回调，当窗口大小调整后将调用该回调函数

	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

	// glad初始化

	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))

	{

		printf("加载失败");

		return -1;

	}

	// 使用循环达到循环渲染效果

	while (!glfwWindowShouldClose(window))

	{

		//自定义输入事件

		processInput(window);

		//交互缓冲区，否则显示空白

		glfwSwapBuffers(window);

		//输入输出事件,否则无法对窗口进行交互

		glfwPollEvents();

	}

	//终止渲染 关闭并清理glfw本地资源

	glfwTerminate();

	return 0;

}

如图所示，搭建成功，可以正常运行