tri-stipple.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
34static GLubyte fly[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
350x03, 0x80, 0x01, 0xC0, 0x06, 0xC0, 0x03, 0x60, 0x04, 0x60, 0x06, 0x20,
360x04, 0x30, 0x0C, 0x20, 0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20,
370x04, 0x06, 0x60, 0x20, 0x44, 0x03, 0xC0, 0x22, 0x44, 0x01, 0x80, 0x22,
380x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
390x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 0x66, 0x01, 0x80, 0x66,
400x33, 0x01, 0x80, 0xCC, 0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30,
410x07, 0xe1, 0x87, 0xe0, 0x03, 0x3f, 0xfc, 0xc0, 0x03, 0x31, 0x8c, 0xc0,
420x03, 0x33, 0xcc, 0xc0, 0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30,
430x18, 0xcc, 0x33, 0x18, 0x10, 0xc4, 0x23, 0x08, 0x10, 0x63, 0xC6, 0x08,
440x10, 0x30, 0x0c, 0x08, 0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08};
45
46
47GLenum doubleBuffer;
48
49static void Init(void)
50{
51   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
52   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
53   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
54   fflush(stderr);
55
56    glEnable (GL_POLYGON_STIPPLE);
57    glPolygonStipple (fly);
58
59    glClearColor(0.0, 0.0, 1.0, 0.0);
60}
61
62static void Reshape(int width, int height)
63{
64
65    glViewport(0, 0, (GLint)width, (GLint)height);
66
67    glMatrixMode(GL_PROJECTION);
68    glLoadIdentity();
69/*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
70    glMatrixMode(GL_MODELVIEW);
71}
72
73static void Key(unsigned char key, int x, int y)
74{
75
76    switch (key) {
77      case 27:
78	exit(1);
79      default:
80	break;
81    }
82
83    glutPostRedisplay();
84}
85
86static void Draw(void)
87{
88   glClear(GL_COLOR_BUFFER_BIT);
89
90   glBegin(GL_TRIANGLES);
91   glColor3f(0,0,.7);
92   glVertex3f( 0.9, -0.9, -0.0);
93   glColor3f(.8,0,0);
94   glVertex3f( 0.9,  0.9, -0.0);
95   glColor3f(0,.9,0);
96   glVertex3f(-0.9,  0.0, -0.0);
97   glEnd();
98
99   glFlush();
100
101   if (doubleBuffer) {
102      glutSwapBuffers();
103   }
104}
105
106static GLenum Args(int argc, char **argv)
107{
108    GLint i;
109
110    doubleBuffer = GL_FALSE;
111
112    for (i = 1; i < argc; i++) {
113        if (strcmp(argv[i], "-sb") == 0) {
114	    doubleBuffer = GL_FALSE;
115	} else if (strcmp(argv[i], "-db") == 0) {
116	    doubleBuffer = GL_TRUE;
117	} else {
118	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
119	    return GL_FALSE;
120	}
121    }
122    return GL_TRUE;
123}
124
125int main(int argc, char **argv)
126{
127    GLenum type;
128
129    glutInit(&argc, argv);
130
131    if (Args(argc, argv) == GL_FALSE) {
132	exit(1);
133    }
134
135    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
136
137    type = GLUT_RGB | GLUT_ALPHA;
138    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
139    glutInitDisplayMode(type);
140
141    if (glutCreateWindow(*argv) == GL_FALSE) {
142	exit(1);
143    }
144
145    Init();
146
147    glutReshapeFunc(Reshape);
148    glutKeyboardFunc(Key);
149    glutDisplayFunc(Draw);
150    glutMainLoop();
151	return 0;
152}
153