Initial revision

1 files changed, 120 insertions, 0 deletions

diff --git a/progs/redbook/texprox.c b/progs/redbook/texprox.c
new file mode 100644
index 00000000000..6f1e853facd
--- /dev/null
+++ b/progs/redbook/texprox.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 1993-1997, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED 
+ * Permission to use, copy, modify, and distribute this software for 
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that 
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission. 
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 
+ * US Government Users Restricted Rights 
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
+ */
+
+/*
+ *  texprox.c
+ *  The brief program illustrates use of texture proxies.
+ *  This program only prints out some messages about whether
+ *  certain size textures are supported and then exits.
+ */
+#include <GL/glut.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef GL_VERSION_1_1
+
+/* Microsoft OpenGL 1.1's <GL/gl.h> forgets to define
+   GL_TEXTURE_INTERNAL_FORMAT. */
+#ifndef GL_TEXTURE_INTERNAL_FORMAT
+#define GL_TEXTURE_INTERNAL_FORMAT GL_TEXTURE_COMPONENTS
+#endif
+
+void init(void) 
+{
+   GLint proxyComponents;
+
+   putchar('\n');
+
+   glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA8,
+                64, 64, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+   glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, 
+                            GL_TEXTURE_INTERNAL_FORMAT, &proxyComponents);
+   printf ("Proxying 64x64 level 0 RGBA8 texture (level 0)\n");
+   if (proxyComponents == GL_RGBA8)
+      printf ("proxy allocation succeeded\n");
+   else
+      printf ("proxy allocation failed\n");
+   putchar('\n');
+
+   glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGBA16,
+                2048, 2048, 0,
+                GL_RGBA, GL_UNSIGNED_SHORT, NULL);
+   glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, 
+                            GL_TEXTURE_INTERNAL_FORMAT, &proxyComponents);
+   printf ("Proxying 2048x2048 level 0 RGBA16 texture (big so unlikely to be supported)\n");
+   if (proxyComponents == GL_RGBA16)
+      printf ("proxy allocation succeeded\n");
+   else
+      printf ("proxy allocation failed\n");
+   putchar('\n');
+}
+
+void display(void)
+{
+   exit(0);
+}
+
+void reshape (int w, int h)
+{
+   glViewport (0, 0, (GLsizei) w, (GLsizei) h); 
+   glMatrixMode (GL_PROJECTION);
+   glLoadIdentity ();
+}
+
+int main(int argc, char** argv)
+{
+   glutInit(&argc, argv);
+   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
+   glutInitWindowSize (500, 500); 
+   glutInitWindowPosition (100, 100);
+   glutCreateWindow (argv[0]);
+   init ();
+   glutDisplayFunc(display); 
+   glutReshapeFunc(reshape);
+   glutMainLoop();
+   return 0;
+}
+#else
+int main(int argc, char** argv)
+{
+    fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
+    fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
+    fprintf (stderr, "you may be able to modify this program to make it run.\n");
+    return 0;
+}
+#endif