src/glut/dos/extens.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  3.4
   4  * Copyright (C) 1995-1998  Brian Paul
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; if not, write to the Free
  18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /*
  22  * DOS/DJGPP glut driver v1.4 for Mesa
  23  *
  24  *  Copyright (C) 2002 - Borca Daniel
  25  *  Email : dborca@yahoo.com
  26  *  Web   : http://www.geocities.com/dborca
  27  */
  28
  29
  30 #include <string.h>
  31
  32 #include <GL/glut.h>
  33
  34 #include "GL/dmesa.h"
  35
  36
  37 int APIENTRY glutExtensionSupported (const char *extension)
  38 {
  39  static const GLubyte *extensions = NULL;
  40  const GLubyte *last, *where;
  41
  42  /* Extension names should not have spaces. */
  43  if (strchr(extension, ' ') || *extension == '\0') {
  44     return GL_FALSE;
  45  }
  46
  47  /* Not my problem if you don't have a valid OpenGL context */
  48  if (!extensions) {
  49     extensions = glGetString(GL_EXTENSIONS);
  50  }
  51
  52  /* Take care of sub-strings etc. */
  53  for (last = extensions;;) {
  54      if ((where = (GLubyte *)strstr((const char *)last, extension)) == NULL) {
  55         return GL_FALSE;
  56      }
  57      last = where + strlen(extension);
  58      if (where == extensions || *(where - 1) == ' ') {
  59         if (*last == ' ' || *last == '\0') {
  60            return GL_TRUE;
  61         }
  62      }
  63  }
  64 }
  65
  66
  67 GLUTproc APIENTRY
  68 glutGetProcAddress (const char *procName)
  69 {
  70  /* TODO - handle glut namespace */
  71  return (GLUTproc)DMesaGetProcAddress(procName);
  72 }