#include <windows.h>
#include <gl/glut.h>

// variable para escribir los dialogos de texto
char *label="";

// Funcion para escribir texto pequeño
void drawString (char *s) 
{ 
  unsigned int i; 
  for (i = 0; i < strlen (s); i++) 
    glutBitmapCharacter (GLUT_BITMAP_HELVETICA_12, s[i]); 
}

// Funcion para escribir texto grande
void drawStringBig (char *s) 
{ 
  unsigned int i; 
  for (i = 0; i < strlen (s); i++) 
    glutBitmapCharacter (GLUT_BITMAP_TIMES_ROMAN_24, s[i]); 
}

void Dibuja(void)
{
  glClear (GL_COLOR_BUFFER_BIT); 

  glColor3f (1.0, 0.0, 0.0); 
  label ="  !  Hola !"; 
  glRasterPos2f (50.0, 200.0); 
  drawStringBig (label);
  
  glColor3f (0.0, 1.0, 0.0); 
  label= "Graficacion por Computadora "; 
  glRasterPos2f (100.0, 50.0); 
  drawString (label); 
	
  glFlush(); 
}

void Reshape(int h, int w)
{
	glClearColor(0.0,0.0,0.0,0.0);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glOrtho(0,400.0,0,400.0,0.0,1.0);
}

int main (int argc, char** argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGBA);
	glutInitWindowSize(300,200);
	glutInitWindowPosition(100,100);

	glutCreateWindow("Mensaje");
	glutDisplayFunc(Dibuja);
	glutReshapeFunc (Reshape); 
	
	glutMainLoop();
}