2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
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.
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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
33 #define CI_OFFSET_1 16
34 #define CI_OFFSET_2 32
36 static GLuint OccQuery
;
40 static void Init(void)
42 fprintf(stderr
, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER
));
43 fprintf(stderr
, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION
));
44 fprintf(stderr
, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR
));
46 glClearColor(0.0, 0.0, 1.0, 0.0);
48 glGenQueriesARB(1, &OccQuery
);
51 static void Reshape(int width
, int height
)
54 glViewport(0, 0, (GLint
)width
, (GLint
)height
);
56 glMatrixMode(GL_PROJECTION
);
58 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
59 glMatrixMode(GL_MODELVIEW
);
62 static void Key(unsigned char key
, int x
, int y
)
75 static void Draw(void)
80 glClear(GL_COLOR_BUFFER_BIT
|GL_DEPTH_BUFFER_BIT
);
82 glEnable(GL_DEPTH_TEST
);
84 glBeginQueryARB(GL_SAMPLES_PASSED_ARB
, OccQuery
);
86 glBegin(GL_TRIANGLES
);
88 glVertex3f( 0.9, -0.9, -30.0);
90 glVertex3f( 0.9, 0.9, -30.0);
92 glVertex3f(-0.9, 0.0, -30.0);
95 glEndQueryARB(GL_SAMPLES_PASSED_ARB
);
98 /* do useful work here, if any */
99 glGetQueryObjectivARB(OccQuery
, GL_QUERY_RESULT_AVAILABLE_ARB
, &ready
);
101 glGetQueryObjectuivARB(OccQuery
, GL_QUERY_RESULT_ARB
, &passed
);
103 fprintf(stderr
, " %d Fragments Visible\n", passed
);
112 static GLenum
Args(int argc
, char **argv
)
116 doubleBuffer
= GL_FALSE
;
118 for (i
= 1; i
< argc
; i
++) {
119 if (strcmp(argv
[i
], "-sb") == 0) {
120 doubleBuffer
= GL_FALSE
;
121 } else if (strcmp(argv
[i
], "-db") == 0) {
122 doubleBuffer
= GL_TRUE
;
124 fprintf(stderr
, "%s (Bad option).\n", argv
[i
]);
131 int main(int argc
, char **argv
)
135 glutInit(&argc
, argv
);
137 if (Args(argc
, argv
) == GL_FALSE
) {
141 glutInitWindowPosition(100, 0); glutInitWindowSize( 250, 250);
143 type
= GLUT_RGB
| GLUT_DEPTH
;
144 type
|= (doubleBuffer
) ? GLUT_DOUBLE
: GLUT_SINGLE
;
145 glutInitDisplayMode(type
);
147 if (glutCreateWindow("First Tri") == GL_FALSE
) {
155 glutReshapeFunc(Reshape
);
156 glutKeyboardFunc(Key
);
157 glutDisplayFunc(Draw
);