f.c

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

GLubyte letter_F[24] = {
	0xc0, 0x00,
	0xc0, 0x00,
	0xc0, 0x00,
	0xc0, 0x00,
	0xc0, 0x00,
	0xff, 0x00,
	0xff, 0x00,
	0xc0, 0x00,
	0xc0, 0x00,
	0xc0, 0x00,
	0xff, 0xc0,
	0xff, 0xc0
};

GLubyte pixel[1] = { 0x80 };

void init(void)
{
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glClearColor(0.0, 0.0, 0.0, 0.0);
}

void display(void)
{
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1.0, 1.0, 1.0);
	glRasterPos2i(20, 20);
	glBitmap(10, 12, 0.0, 0.0, 11.0, 0.0, pixel);
	glBitmap(10, 12, 0.0, 0.0, 11.0, 0.0, pixel);
	glBitmap(10, 12, 0.0, 0.0, 11.0, 0.0, pixel);
	glFlush();
}

void reshape(int w, int h)
{
	glViewport(0, 0, (GLsizei)w, (GLsizei)h);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glOrtho(0, w, 0, h, -1.0, 1.0);
	glMatrixMode(GL_MODELVIEW);
}

void keyboard(unsigned char key, int x, int y)
{
	if (key == 27)
		exit(0);
}

int main(int argc, char** argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
	glutInitWindowSize(100, 100);
	glutInitWindowPosition(100, 100);
	glutCreateWindow(argv[0]);
	init();
	glutReshapeFunc(reshape);
	glutKeyboardFunc(keyboard);
	glutDisplayFunc(display);
	glutMainLoop();
	return 0;
}