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;
36
37static void Init(void)
38{
39   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
40   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
41   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
42   fflush(stderr);
43
44    glClearColor(0.0, 0.0, 1.0, 0.0);
45}
46
47static void Reshape(int width, int height)
48{
49
50    glViewport(0, 0, (GLint)width, (GLint)height);
51
52    glMatrixMode(GL_PROJECTION);
53    glLoadIdentity();
54    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
55    glMatrixMode(GL_MODELVIEW);
56}
57
58static void Key(unsigned char key, int x, int y)
59{
60
61    switch (key) {
62      case 27:
63	exit(1);
64      default:
65	break;
66    }
67
68    glutPostRedisplay();
69}
70
71static void Draw(void)
72{
73   glClear(GL_COLOR_BUFFER_BIT);
74   glShadeModel(GL_FLAT);
75
76   glBegin(GL_LINES);
77   glColor3f(0,0,.7);
78   glVertex3f( 0.9, -0.9, -30.0);
79   glColor3f(.8,0,0);
80   glVertex3f( 0.9,  0.9, -30.0);
81
82   glColor3f(.8,0,0);
83   glVertex3f( 0.9,  0.9, -30.0);
84   glColor3f(0,.9,0);
85   glVertex3f(-0.9,  0.0, -30.0);
86
87
88   glColor3f(0,.9,0);
89   glVertex3f(-0.9,  0.0, -30.0);
90   glColor3f(0,0,.7);
91   glVertex3f( 0.9, -0.9, -30.0);
92   glEnd();
93
94   glFlush();
95
96   if (doubleBuffer) {
97      glutSwapBuffers();
98   }
99}
100
101static GLenum Args(int argc, char **argv)
102{
103    GLint i;
104
105    doubleBuffer = GL_FALSE;
106
107    for (i = 1; i < argc; i++) {
108        if (strcmp(argv[i], "-sb") == 0) {
109	    doubleBuffer = GL_FALSE;
110	} else if (strcmp(argv[i], "-db") == 0) {
111	    doubleBuffer = GL_TRUE;
112	} else {
113	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
114	    return GL_FALSE;
115	}
116    }
117    return GL_TRUE;
118}
119
120int main(int argc, char **argv)
121{
122    GLenum type;
123
124    glutInit(&argc, argv);
125
126    if (Args(argc, argv) == GL_FALSE) {
127	exit(1);
128    }
129
130    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
131
132    type = GLUT_RGB;
133    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
134    glutInitDisplayMode(type);
135
136    if (glutCreateWindow(*argv) == GL_FALSE) {
137	exit(1);
138    }
139
140    Init();
141
142    glutReshapeFunc(Reshape);
143    glutKeyboardFunc(Key);
144    glutDisplayFunc(Draw);
145    glutMainLoop();
146	return 0;
147}
148