1/*
2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that (i) the above copyright notices and this permission notice appear in
7 * all copies of the software and related documentation, and (ii) the name of
8 * Silicon Graphics may not be used in any advertising or
9 * publicity relating to the software without the specific, prior written
10 * permission of Silicon Graphics.
11 *
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
13 * ANY KIND,
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include "glut_wrap.h"
29
30
31#define CI_OFFSET_1 16
32#define CI_OFFSET_2 32
33
34
35GLenum doubleBuffer = 1;
36int win;
37
38static void Init(void)
39{
40   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
41   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
42   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
43   fflush(stderr);
44
45   glClearColor(0.3, 0.1, 0.3, 0.0);
46}
47
48static void Reshape(int width, int height)
49{
50
51   glViewport(0, 0, (GLint)width, (GLint)height);
52
53   glMatrixMode(GL_PROJECTION);
54   glLoadIdentity();
55   glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
56   glMatrixMode(GL_MODELVIEW);
57}
58
59static void Key(unsigned char key, int x, int y)
60{
61   switch (key) {
62      case 27:
63         exit(0);
64      default:
65         glutPostRedisplay();
66         return;
67   }
68}
69
70static void Draw(void)
71{
72   glClear(GL_COLOR_BUFFER_BIT);
73
74   glBegin(GL_TRIANGLES);
75   glColor3f(.8,0,0);
76   glVertex3f(-0.9, -0.9, -30.0);
77   glColor3f(0,.9,0);
78   glVertex3f( 0.9, -0.9, -30.0);
79   glColor3f(0,0,.7);
80   glVertex3f( 0.0,  0.9, -30.0);
81   glEnd();
82
83
84   glLineWidth(4.0);
85
86   glBegin(GL_LINES);
87   glColor3f(.1,.7,.1);
88   glVertex3f( 0.5, -0.5, -30.0);
89   glVertex3f( 0.5,  0.5, -30.0);
90
91   glColor3f(.1,.1,.8);
92   glVertex3f( 0.5,  0.5, -30.0);
93   glVertex3f(-0.5,  0.5, -30.0);
94
95   glColor3f(.5,.1,.1);
96   glVertex3f(-0.5,  0.5, -30.0);
97   glVertex3f(-0.5, -0.5, -30.0);
98
99   glColor3f(.8,.8,.8);
100   glVertex3f(-0.5, -0.5, -30.0);
101   glVertex3f( 0.5, -0.5, -30.0);
102   glEnd();
103
104   /* glLineWidth(12.0); */
105
106   /* Redraw parts of the lines:
107    */
108   glBegin(GL_LINES);
109   glColor3f(.1,.7,.1);
110   glVertex3f( 0.5, -0.2, -30.0);
111   glVertex3f( 0.5,  0.2, -30.0);
112
113   glColor3f(.1,.1,.8);
114   glVertex3f( 0.2,  0.5, -30.0);
115   glVertex3f(-0.2,  0.5, -30.0);
116
117   glColor3f(.5,.1,.1);
118   glVertex3f(-0.5,  0.2, -30.0);
119   glVertex3f(-0.5, -0.2, -30.0);
120
121   glColor3f(.8,.8,.8);
122   glVertex3f(-0.2, -0.5, -30.0);
123   glVertex3f( 0.2, -0.5, -30.0);
124   glEnd();
125
126
127   glFlush();
128
129   if (doubleBuffer) {
130      glutSwapBuffers();
131   }
132}
133
134static GLenum Args(int argc, char **argv)
135{
136   GLint i;
137
138   for (i = 1; i < argc; i++) {
139      if (strcmp(argv[i], "-sb") == 0) {
140         doubleBuffer = GL_FALSE;
141      } else if (strcmp(argv[i], "-db") == 0) {
142         doubleBuffer = GL_TRUE;
143      } else {
144         fprintf(stderr, "%s (Bad option).\n", argv[i]);
145         return GL_FALSE;
146      }
147   }
148   return GL_TRUE;
149}
150
151int main(int argc, char **argv)
152{
153   GLenum type;
154
155   glutInit(&argc, argv);
156
157   if (Args(argc, argv) == GL_FALSE) {
158      exit(1);
159   }
160
161   glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
162
163   type = GLUT_RGB | GLUT_ALPHA;
164   type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
165   glutInitDisplayMode(type);
166
167   win = glutCreateWindow(*argv);
168   if (!win) {
169      exit(1);
170   }
171
172   Init();
173
174   glutReshapeFunc(Reshape);
175   glutKeyboardFunc(Key);
176   glutDisplayFunc(Draw);
177   glutMainLoop();
178   return 0;
179}
180