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;
36GLint first_list, list;
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(0.0, 0.0, 1.0, 0.0);
46
47   /* First list will disrupt state which might potentially be
48    * short-circuited in calling list:
49    */
50   first_list = glGenLists(1);
51   glNewList(first_list, GL_COMPILE);
52   /* glColor3f(0,1,0); */
53   glEndList();
54
55
56   /* List that looks like it might have redundant state:
57    */
58   list = glGenLists(1);
59   glNewList(list, GL_COMPILE);
60
61   glShadeModel(GL_FLAT);
62   glBegin(GL_TRIANGLES);
63   glColor3f(1,0,0);
64   glVertex3f( -0.9,  0.9, -30.0);
65   glVertex3f( -0.9, -0.9, -30.0);
66   glCallList( first_list );
67   glVertex3f(  0.9,  0.0, -30.0);
68   glEnd();
69   glEndList();
70}
71
72static void Reshape(int width, int height)
73{
74
75    glViewport(0, 0, (GLint)width, (GLint)height);
76
77    glMatrixMode(GL_PROJECTION);
78    glLoadIdentity();
79    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
80    glMatrixMode(GL_MODELVIEW);
81}
82
83static void Key(unsigned char key, int x, int y)
84{
85
86    switch (key) {
87      case 27:
88	exit(1);
89      default:
90	break;
91    }
92
93    glutPostRedisplay();
94}
95
96
97
98
99static void Draw(void)
100{
101   glClear(GL_COLOR_BUFFER_BIT);
102
103   glShadeModel( GL_SMOOTH );
104   glCallList(list);
105
106   glFlush();
107
108   if (doubleBuffer) {
109      glutSwapBuffers();
110   }
111}
112
113static GLenum Args(int argc, char **argv)
114{
115    GLint i;
116
117    doubleBuffer = GL_FALSE;
118
119    for (i = 1; i < argc; i++) {
120        if (strcmp(argv[i], "-sb") == 0) {
121	    doubleBuffer = GL_FALSE;
122	} else if (strcmp(argv[i], "-db") == 0) {
123	    doubleBuffer = GL_TRUE;
124	} else {
125	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
126	    return GL_FALSE;
127	}
128    }
129    return GL_TRUE;
130}
131
132int main(int argc, char **argv)
133{
134    GLenum type;
135
136    glutInit(&argc, argv);
137
138    if (Args(argc, argv) == GL_FALSE) {
139	exit(1);
140    }
141
142    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
143
144    type = GLUT_RGB | GLUT_ALPHA;
145    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
146    glutInitDisplayMode(type);
147
148    if (glutCreateWindow(*argv) == GL_FALSE) {
149	exit(1);
150    }
151
152    Init();
153
154    glutReshapeFunc(Reshape);
155    glutKeyboardFunc(Key);
156    glutDisplayFunc(Draw);
157    glutMainLoop();
158	return 0;
159}
160