summaryrefslogtreecommitdiff
path: root/src/glut/dos/state.c
blob: 4f74f2430429b82245191a65af0190fb1a48aeb0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
/*
 * Mesa 3-D graphics library
 * Version:  3.4
 * Copyright (C) 1995-1998  Brian Paul
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * DOS/DJGPP glut driver v1.5 for Mesa
 *
 *  Copyright (C) 2002 - Daniel Borca
 *  Email : dborca@yahoo.com
 *  Web   : http://www.geocities.com/dborca
 */


#include <stdio.h>

#include "glutint.h"


#define FREQUENCY 100 /* set this to zero to use the default timer */


static int timer_installed;
#if FREQUENCY
static volatile int ticks;


static void
ticks_timer (void *p)
{
   (void)p;
   ticks++;
} ENDOFUNC(ticks_timer)
#else
#include <time.h>

static struct timeval then;
#endif


int APIENTRY
glutGet (GLenum type)
{
   switch (type) {
      case GLUT_WINDOW_X:
         return g_curwin->xpos;
      case GLUT_WINDOW_Y:
         return g_curwin->ypos;
      case GLUT_WINDOW_WIDTH:
         return g_curwin->width;
      case GLUT_WINDOW_HEIGHT:
         return g_curwin->height;
      case GLUT_WINDOW_STENCIL_SIZE:
         return g_stencil;
      case GLUT_WINDOW_DEPTH_SIZE:
         return g_depth;
      case GLUT_WINDOW_RGBA:
         return !(g_display_mode & GLUT_INDEX);
      case GLUT_WINDOW_COLORMAP_SIZE:
         return (g_display_mode & GLUT_INDEX) ? (256 - RESERVED_COLORS) : 0;
      case GLUT_SCREEN_WIDTH:
         return g_screen_w;
      case GLUT_SCREEN_HEIGHT:
         return g_screen_h;
      case GLUT_INIT_WINDOW_X:
         return g_init_x;
      case GLUT_INIT_WINDOW_Y:
         return g_init_y;
      case GLUT_INIT_WINDOW_WIDTH:
         return g_init_w;
      case GLUT_INIT_WINDOW_HEIGHT:
         return g_init_h;
      case GLUT_INIT_DISPLAY_MODE:
         return g_display_mode;
      case GLUT_ELAPSED_TIME:
#if FREQUENCY
         if (!timer_installed) {
            timer_installed = GL_TRUE;
            LOCKDATA(ticks);
            LOCKFUNC(ticks_timer);
            pc_install_int(ticks_timer, NULL, FREQUENCY);
         }
         return ticks * 1000 / FREQUENCY;
#else
         if (!timer_installed) {
            timer_installed = GL_TRUE;
            gettimeofday(&then, NULL);
            return 0;
         } else {
            struct timeval now;
            gettimeofday(&now, NULL);
            return (now.tv_usec - then.tv_usec) / 1000 +
                   (now.tv_sec  - then.tv_sec)  * 1000;
         }
#endif
      default:
         return -1;
   }
}


int APIENTRY
glutDeviceGet (GLenum type)
{
   switch (type) {
      case GLUT_HAS_KEYBOARD:
         return GL_TRUE;
      case GLUT_HAS_MOUSE:
         return (g_mouse != 0);
      case GLUT_NUM_MOUSE_BUTTONS:
         return g_mouse;
      case GLUT_HAS_SPACEBALL:
      case GLUT_HAS_DIAL_AND_BUTTON_BOX:
      case GLUT_HAS_TABLET:
         return GL_FALSE;
      case GLUT_NUM_SPACEBALL_BUTTONS:
      case GLUT_NUM_BUTTON_BOX_BUTTONS:
      case GLUT_NUM_DIALS:
      case GLUT_NUM_TABLET_BUTTONS:
         return 0;
      default:
         return -1;
   }
}


int APIENTRY
glutGetModifiers (void)
{
   int mod = 0;
   int shifts = pc_keyshifts();

   if (shifts & (KB_SHIFT_FLAG | KB_CAPSLOCK_FLAG)) {
      mod |= GLUT_ACTIVE_SHIFT;
   }

   if (shifts & KB_ALT_FLAG) {
      mod |= GLUT_ACTIVE_ALT;
   }

   if (shifts & KB_CTRL_FLAG) {
      mod |= GLUT_ACTIVE_CTRL;
   }

   return mod;
}


/* GAME MODE
 * Hack alert: incomplete... what is GameMode, anyway?
 */
GLint g_game;
static GLboolean game_possible;
static GLboolean game_active;
static GLuint game_width;
static GLuint game_height;
static GLuint game_bpp;
static GLuint game_refresh;


void APIENTRY
glutGameModeString (const char *string)
{
   if (sscanf(string, "%ux%u:%u@%u", &game_width, &game_height, &game_bpp, &game_refresh) == 4) {
      game_possible = GL_TRUE;
   }
}


int APIENTRY
glutGameModeGet (GLenum mode)
{
   switch (mode) {
      case GLUT_GAME_MODE_ACTIVE:
         return game_active;
      case GLUT_GAME_MODE_POSSIBLE:
         return game_possible && !g_curwin;
      case GLUT_GAME_MODE_WIDTH:
         return game_active ? (int)game_width : -1;
      case GLUT_GAME_MODE_HEIGHT:
         return game_active ? (int)game_height : -1;
      case GLUT_GAME_MODE_PIXEL_DEPTH:
         return game_active ? (int)game_bpp : -1;
      case GLUT_GAME_MODE_REFRESH_RATE:
         return game_active ? (int)game_refresh : -1;
      default:
         return -1;
   }
}


int APIENTRY
glutEnterGameMode (void)
{
   if (glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)) {
      g_bpp = game_bpp;
      g_refresh = game_refresh;

      glutInitWindowSize(game_width, game_height);

      if ((g_game = glutCreateWindow("<game>")) > 0) {
         game_active = GL_TRUE;
      }

      return g_game;
   } else {
      return 0;
   }
}


void GLUTAPIENTRY
glutLeaveGameMode (void)
{
   if (glutGameModeGet(GLUT_GAME_MODE_ACTIVE)) {
      game_active = GL_FALSE;

      glutDestroyWindow(g_game);
   }
}