src/glut/dos/state.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 v1.0 for Mesa 4.0
  23  *
  24  *  Copyright (C) 2002 - Borca Daniel
  25  *  Email : dborca@yahoo.com
  26  *  Web   : http://www.geocities.com/dborca
  27  */
  28
  29
  30 #include "GL/glut.h"
  31 #include "internal.h"
  32
  33
  34 #define FREQUENCY 100
  35
  36
  37 static int timer_installed;
  38 static volatile int ticks;
  39
  40 static void ticks_timer (void *p)
  41 {
  42  (void)p;
  43  ticks++;
  44 } ENDOFUNC(ticks_timer)
  45
  46
  47
  48 int APIENTRY glutGet (GLenum type)
  49 {
  50  switch (type) {
  51         case GLUT_WINDOW_RGBA:
  52              return 1;
  53         case GLUT_ELAPSED_TIME:
  54              if (!timer_installed) {
  55                 timer_installed = !timer_installed;
  56                 LOCKDATA(ticks);
  57                 LOCKFUNC(ticks_timer);
  58                 pc_install_int(ticks_timer, NULL, FREQUENCY);
  59              }
  60              return ticks*1000/FREQUENCY;
  61         default:
  62              return 0;
  63  }
  64 }
  65
  66
  67 int APIENTRY glutDeviceGet (GLenum type)
  68 {
  69  return 0;
  70 }