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
Init(void)36 static 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
Reshape(int width,int height)46 static 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
Key(unsigned char key,int x,int y)57 static 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
Draw(void)68 static 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
Args(int argc,char ** argv)98 static GLenum Args(int argc, char **argv)
99 {
100 return GL_TRUE;
101 }
102
main(int argc,char ** argv)103 int 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