src/glut/mini/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 <sys/time.h>
  32
  33
  34 #define TIMEDELTA(dest, src1, src2) {                           \
  35    if(((dest).tv_usec = (src1).tv_usec - (src2).tv_usec) < 0) { \
  36       (dest).tv_usec += 1000000;                                \
  37       (dest).tv_sec = (src1).tv_sec - (src2).tv_sec - 1;        \
  38    } else {                                                     \
  39       (dest).tv_sec = (src1).tv_sec - (src2).tv_sec;            \
  40    }                                                            \
  41 }
  42
  43 int APIENTRY glutGet (GLenum type)
  44 {
  45
  46    switch (type) {
  47    case GLUT_WINDOW_RGBA:
  48       return 1;
  49    case GLUT_ELAPSED_TIME: {
  50       static int inited = 0;
  51       static struct timeval elapsed, beginning, now;
  52       if (!inited) {
  53          gettimeofday(&beginning, 0);
  54          inited = 1;
  55       }
  56       gettimeofday(&now, 0);
  57       TIMEDELTA(elapsed, now, beginning);
  58       /* Return elapsed milliseconds. */
  59       return (int) ((elapsed.tv_sec * 1000) + (elapsed.tv_usec / 1000));
  60    }
  61    default:
  62       return 0;
  63    }
  64 }
  65
  66
  67 int APIENTRY glutDeviceGet (GLenum type)
  68 {
  69  return 0;
  70 }