1/*
2 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
11 *
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States.  Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
34 *
35 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
36 */
37
38/*
39 * hello.c
40 * This is a simple, introductory OpenGL program.
41 */
42#include <stdlib.h>
43#include "glut_wrap.h"
44
45static void display(void)
46{
47/* clear all pixels  */
48   glClear (GL_COLOR_BUFFER_BIT);
49
50/* draw white polygon (rectangle) with corners at
51 * (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0)
52 */
53   glColor3f (1.0, 1.0, 1.0);
54   glBegin(GL_POLYGON);
55      glVertex3f (0.25, 0.25, 0.0);
56      glVertex3f (0.75, 0.25, 0.0);
57      glVertex3f (0.75, 0.75, 0.0);
58      glVertex3f (0.25, 0.75, 0.0);
59   glEnd();
60
61/* don't wait!
62 * start processing buffered OpenGL routines
63 */
64   glFlush ();
65}
66
67static void init (void)
68{
69/* select clearing color 	*/
70   glClearColor (0.0, 0.0, 0.0, 0.0);
71
72/* initialize viewing values  */
73   glMatrixMode(GL_PROJECTION);
74   glLoadIdentity();
75   glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
76}
77
78static void
79key(unsigned char k, int x, int y)
80{
81  switch (k) {
82  case 27:  /* Escape */
83    exit(0);
84    break;
85  default:
86    return;
87  }
88  glutPostRedisplay();
89}
90
91/*
92 * Declare initial window size, position, and display mode
93 * (single buffer and RGBA).  Open window with "hello"
94 * in its title bar.  Call initialization routines.
95 * Register callback function to display graphics.
96 * Enter main loop and process events.
97 */
98int main(int argc, char** argv)
99{
100   glutInit(&argc, argv);
101   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
102   glutInitWindowSize (250, 250);
103   glutInitWindowPosition (100, 100);
104   glutCreateWindow ("hello");
105   init ();
106   glutDisplayFunc(display);
107   glutKeyboardFunc(key);
108   glutMainLoop();
109   return 0;   /* ANSI C requires main to return int. */
110}
111