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 <math.h>
29#include "glut_wrap.h"
30
31
32#define CI_OFFSET_1 16
33#define CI_OFFSET_2 32
34
35
36static void Init(void)
37{
38   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
39   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
40   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
41   fflush(stderr);
42
43    glClearColor(0.3, 0.1, 0.3, 0.0);
44}
45
46static void Reshape(int width, int height)
47{
48
49    glViewport(0, 0, (GLint)width, (GLint)height);
50
51    glMatrixMode(GL_PROJECTION);
52    glLoadIdentity();
53    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
54    glMatrixMode(GL_MODELVIEW);
55}
56
57static void Key(unsigned char key, int x, int y)
58{
59   switch (key) {
60   case 27:
61      exit(0);
62   default:
63      glutPostRedisplay();
64      return;
65   }
66}
67
68static void Draw(void)
69{
70   static float f = 0;
71   while (1) {
72      f += .1;
73      glClearColor((sin(f)+1)/2.0,(cos(f)+1)/2.0,0.5,1);
74      glClear(GL_COLOR_BUFFER_BIT);
75      glutSwapBuffers();
76
77      {
78         static GLint T0 = 0;
79         static GLint Frames = 0;
80         GLint t = glutGet(GLUT_ELAPSED_TIME);
81
82         Frames++;
83
84         if (t - T0 >= 5000) {
85            GLfloat seconds = (t - T0) / 1000.0;
86            GLfloat fps = Frames / seconds;
87            printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
88            fflush(stdout);
89            T0 = t;
90            Frames = 0;
91         }
92      }
93
94   }
95   glutPostRedisplay();
96}
97
98static GLenum Args(int argc, char **argv)
99{
100    return GL_TRUE;
101}
102
103int main(int argc, char **argv)
104{
105    GLenum type;
106
107    glutInit(&argc, argv);
108
109    if (Args(argc, argv) == GL_FALSE) {
110	exit(1);
111    }
112
113    glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
114
115    type = GLUT_RGB | GLUT_ALPHA;
116    type |= GLUT_DOUBLE;
117    glutInitDisplayMode(type);
118
119    if (glutCreateWindow(*argv) == GL_FALSE) {
120	exit(1);
121    }
122
123    Init();
124
125    glutReshapeFunc(Reshape);
126    glutKeyboardFunc(Key);
127    glutDisplayFunc(Draw);
128    glutMainLoop();
129    return 0;
130}
131