#include <stdio.h>
#include <GL/gl.h>
#include <GLFW/glfw3.h>


void errorCallback(int id, const char* message)
{
        printf("Error code=%d, message=%s\n", id, message);
}

int main(void)
{
    GLFWwindow* window;

    glfwSetErrorCallback(errorCallback);
    /* Initialize the library */
    if (!glfwInit())
    {
        printf("init failed\n");
        return -1;
    }

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        printf("failed to create window\n");
        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);

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

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

    glfwTerminate();
    printf("closing window normally!\n");
    return 0;
}