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#include<stdio.h>
#include<glad/glad.h>
#include<GLFW/glfw3.h>

void framebuffer_size_callback(GLFWwindow* window, int width, int height);
int main()
{
	if (GL_FALSE == glfwInit())
	{
		printf("Iniitialize glfw failer\n");
		return -1;
	}
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

	GLFWwindow* window = glfwCreateWindow(800, 600, "OPENGL_WINDOW", NULL, NULL);
	if (NULL == window)
	{
		printf("Failed to create GLFW window\n");
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);
	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
	{
		printf("Falied to initialize GLAD\n");
	}
	glViewport(0, 0, 800, 600);
	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
	while (!glfwWindowShouldClose(window))
	{
		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
		glClear(GL_COLOR_BUFFER_BIT);
		glfwSwapBuffers(window);
		glfwPollEvents();
	}
	glfwTerminate();
	return 0;
}

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