Merge commit 'origin/master' into gallium-0.2
[mesa.git] / progs / trivial / tri.c
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 <GL/glut.h>
29
30
31 #define CI_OFFSET_1 16
32 #define CI_OFFSET_2 32
33
34
35 GLenum doubleBuffer = 1;
36 int win;
37
38 static 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
44 glClearColor(0.3, 0.1, 0.3, 0.0);
45 }
46
47 static void Reshape(int width, int height)
48 {
49
50 glViewport(0, 0, (GLint)width, (GLint)height);
51
52 glMatrixMode(GL_PROJECTION);
53 glLoadIdentity();
54 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
55 glMatrixMode(GL_MODELVIEW);
56 }
57
58 static void Key(unsigned char key, int x, int y)
59 {
60 switch (key) {
61 case 27:
62 exit(0);
63 default:
64 glutPostRedisplay();
65 return;
66 }
67 }
68
69 static void Draw(void)
70 {
71 glClear(GL_COLOR_BUFFER_BIT);
72
73 glBegin(GL_TRIANGLES);
74 glColor3f(.8,0,0);
75 glVertex3f(-0.9, -0.9, -30.0);
76 glColor3f(0,.9,0);
77 glVertex3f( 0.9, -0.9, -30.0);
78 glColor3f(0,0,.7);
79 glVertex3f( 0.0, 0.9, -30.0);
80 glEnd();
81
82 glFlush();
83
84 if (doubleBuffer) {
85 glutSwapBuffers();
86 }
87 }
88
89 static GLenum Args(int argc, char **argv)
90 {
91 GLint i;
92
93 for (i = 1; i < argc; i++) {
94 if (strcmp(argv[i], "-sb") == 0) {
95 doubleBuffer = GL_FALSE;
96 } else if (strcmp(argv[i], "-db") == 0) {
97 doubleBuffer = GL_TRUE;
98 } else {
99 fprintf(stderr, "%s (Bad option).\n", argv[i]);
100 return GL_FALSE;
101 }
102 }
103 return GL_TRUE;
104 }
105
106 int main(int argc, char **argv)
107 {
108 GLenum type;
109
110 glutInit(&argc, argv);
111
112 if (Args(argc, argv) == GL_FALSE) {
113 exit(1);
114 }
115
116 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
117
118 type = GLUT_RGB | GLUT_ALPHA;
119 type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
120 glutInitDisplayMode(type);
121
122 win = glutCreateWindow("First Tri");
123 if (!win) {
124 exit(1);
125 }
126
127 Init();
128
129 glutReshapeFunc(Reshape);
130 glutKeyboardFunc(Key);
131 glutDisplayFunc(Draw);
132 glutMainLoop();
133 return 0;
134 }