hello-opengl.c

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

void draw (void)
{
  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glColor3f (1.0, 1.0, 0.0);
  glRasterPos2f (-0.65, -0.1);
  char *hello = "Hello, world!";
  while (*hello)
    glutBitmapCharacter (GLUT_BITMAP_HELVETICA_18, *hello++);
  glFlush ();
  glutSwapBuffers ();
}

void timer_handler (int data)
{
  exit (0);
}

int main (int argc, char **argv)
{
  glutInit (&argc, argv);
  glutInitDisplayMode (GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
  glutInitWindowSize (320, 200);
  glutCreateWindow ("Hello");
  glutDisplayFunc (draw);
  glutTimerFunc (5000, timer_handler, 0);
  glutMainLoop ();
  return 0;
}