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         glutDestroyWindow(win);
64         exit(0);
65      default:
66         glutPostRedisplay();
67         return;
68   }
69}
70
71static void Draw(void)
72{
73   glClear(GL_COLOR_BUFFER_BIT);
74
75   glBegin(GL_TRIANGLES);
76   glColor3f(.8,0,0);
77   glVertex3f(-0.9, -0.9, -30.0);
78   glColor3f(0,.9,0);
79   glVertex3f( 0.9, -0.9, -30.0);
80   glColor3f(0,0,.7);
81   glVertex3f( 0.0,  0.9, -30.0);
82   glEnd();
83
84   glFlush();
85
86   if (doubleBuffer) {
87      glutSwapBuffers();
88   }
89}
90
91static GLenum Args(int argc, char **argv)
92{
93   GLint i;
94
95   for (i = 1; i < argc; i++) {
96      if (strcmp(argv[i], "-sb") == 0) {
97         doubleBuffer = GL_FALSE;
98      } else if (strcmp(argv[i], "-db") == 0) {
99         doubleBuffer = GL_TRUE;
100      } else {
101         fprintf(stderr, "%s (Bad option).\n", argv[i]);
102         return GL_FALSE;
103      }
104   }
105   return GL_TRUE;
106}
107
108int main(int argc, char **argv)
109{
110   GLenum type;
111
112   glutInit(&argc, argv);
113
114   if (Args(argc, argv) == GL_FALSE) {
115      exit(1);
116   }
117
118   glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
119
120   type = GLUT_RGB | GLUT_ALPHA;
121   type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
122   glutInitDisplayMode(type);
123
124   win = glutCreateWindow(*argv);
125   if (!win) {
126      exit(1);
127   }
128
129   Init();
130
131   glutReshapeFunc(Reshape);
132   glutKeyboardFunc(Key);
133   glutDisplayFunc(Draw);
134   glutMainLoop();
135   return 0;
136}
137