1.3 glfw / glad

freeglut + glfw

#include 
//#define GLEW_STATIC
#include 
#include 
#include 

using namespace std;

int main(int argc, char** argv[])
{
	//glewExperimental = GL_TRUE;

	//GLenum err = glewInit();
	//if (err != GLEW_OK)
	//{
	//	cout << "failed to initalize GLEW" << endl;
	//	return -1;// 会有调用不成功的案例
	//}



	glfwInit();//初始化
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);//配置GLFW
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);//配置GLFW
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);//
	glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);

	glewExperimental = GL_TRUE;

	GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", nullptr, nullptr);
	if (window == nullptr)
	{
		cout << "Failed to create GLFW window" << endl;
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);
	while (!glfwWindowShouldClose(window))
	{
		glfwPollEvents();
		glfwSwapBuffers(window);
	}
	glfwTerminate();
	return 0;


}

glad

#include 
#include 
#include 
using namespace std;

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

int main() {
	glfwInit();
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

	GLFWwindow *window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
	if (window == NULL) {
		cout << "Failed to create GLFW window" << endl;
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);

	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
		std::cout << "Failed to initialize GLAD" << std::endl;
		return -1;
	}

	glViewport(0, 0, 800, 600);

	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

	while (!glfwWindowShouldClose(window)) {
		glfwSwapBuffers(window);
		glfwPollEvents();
	}

	glfwTerminate();
	return 0;
}

void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
	glViewport(0, 0, width, height);
}