dlist-dangling.c revision 32001f49 
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 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
48   list = glGenLists(1);
49   glNewList(list, GL_COMPILE);
50   glBegin(GL_TRIANGLES);
51   glVertex3f( 0.9, -0.9, -30.0);
52   glVertex3f( 0.9,  0.9, -30.0);
53   glColor3f(.8,0,0);
54   glVertex3f(-0.9,  0.0, -30.0);
55   glEnd();
56   glEndList();
57}
58
59static void Reshape(int width, int height)
60{
61
62    glViewport(0, 0, (GLint)width, (GLint)height);
63
64    glMatrixMode(GL_PROJECTION);
65    glLoadIdentity();
66    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
67    glMatrixMode(GL_MODELVIEW);
68}
69
70static void Key(unsigned char key, int x, int y)
71{
72
73    switch (key) {
74      case 27:
75	exit(1);
76      default:
77	break;
78    }
79
80    glutPostRedisplay();
81}
82
83
84
85
86static void Draw(void)
87{
88   glClear(GL_COLOR_BUFFER_BIT);
89
90   glColor3f(0,.9,0);
91   glCallList(list);
92
93   glRotatef(45,0,0,1);
94   glColor3f(1,0,1);
95   glCallList(list);
96
97   glFlush();
98
99   if (doubleBuffer) {
100      glutSwapBuffers();
101   }
102}
103
104static GLenum Args(int argc, char **argv)
105{
106    GLint i;
107
108    doubleBuffer = GL_FALSE;
109
110    for (i = 1; i < argc; i++) {
111        if (strcmp(argv[i], "-sb") == 0) {
112	    doubleBuffer = GL_FALSE;
113	} else if (strcmp(argv[i], "-db") == 0) {
114	    doubleBuffer = GL_TRUE;
115	} else {
116	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
117	    return GL_FALSE;
118	}
119    }
120    return GL_TRUE;
121}
122
123int main(int argc, char **argv)
124{
125    GLenum type;
126
127    glutInit(&argc, argv);
128
129    if (Args(argc, argv) == GL_FALSE) {
130	exit(1);
131    }
132
133    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
134
135    type = GLUT_RGB | GLUT_ALPHA;
136    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
137    glutInitDisplayMode(type);
138
139    if (glutCreateWindow(*argv) == GL_FALSE) {
140	exit(1);
141    }
142
143    Init();
144
145    glutReshapeFunc(Reshape);
146    glutKeyboardFunc(Key);
147    glutDisplayFunc(Draw);
148    glutMainLoop();
149	return 0;
150}
151