1/*
2 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
11 *
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States.  Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
34 *
35 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
36 */
37
38/*
39 *  texprox.c
40 *  The brief program illustrates use of texture proxies.
41 *  This program only prints out some messages about whether
42 *  certain size textures are supported and then exits.
43 */
44#include "glut_wrap.h"
45#include <stdlib.h>
46#include <stdio.h>
47
48#ifdef GL_VERSION_1_1
49
50/* Microsoft OpenGL 1.1's <GL/gl.h> forgets to define
51   GL_TEXTURE_INTERNAL_FORMAT. */
52#ifndef GL_TEXTURE_INTERNAL_FORMAT
53#define GL_TEXTURE_INTERNAL_FORMAT GL_TEXTURE_COMPONENTS
54#endif
55
56static void init(void)
57{
58   GLint proxyComponents;
59
60   putchar('\n');
61
62   glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA8,
63                64, 64, 0,
64                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
65   glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0,
66                            GL_TEXTURE_INTERNAL_FORMAT, &proxyComponents);
67   printf ("Proxying 64x64 level 0 RGBA8 texture (level 0)\n");
68   if (proxyComponents == GL_RGBA8)
69      printf ("proxy allocation succeeded\n");
70   else
71      printf ("proxy allocation failed\n");
72   putchar('\n');
73
74   glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA16,
75                2048, 2048, 0,
76                GL_RGBA, GL_UNSIGNED_SHORT, NULL);
77   glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0,
78                            GL_TEXTURE_INTERNAL_FORMAT, &proxyComponents);
79   printf ("Proxying 2048x2048 level 0 RGBA16 texture (big so unlikely to be supported)\n");
80   if (proxyComponents == GL_RGBA16)
81      printf ("proxy allocation succeeded\n");
82   else
83      printf ("proxy allocation failed\n");
84   putchar('\n');
85}
86
87static void display(void)
88{
89   exit(0);
90}
91
92static void reshape (int w, int h)
93{
94   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
95   glMatrixMode (GL_PROJECTION);
96   glLoadIdentity ();
97}
98
99int main(int argc, char** argv)
100{
101   glutInit(&argc, argv);
102   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
103   glutInitWindowSize (500, 500);
104   glutInitWindowPosition (100, 100);
105   glutCreateWindow (argv[0]);
106   init ();
107   glutDisplayFunc(display);
108   glutReshapeFunc(reshape);
109   glutMainLoop();
110   return 0;
111}
112#else
113int main(int argc, char** argv)
114{
115    fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
116    fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
117    fprintf (stderr, "you may be able to modify this program to make it run.\n");
118    return 0;
119}
120#endif
121