vcs.maemo.org Git - neverball/blob - share/config.c

   1 /*
   2  * Copyright (C) 2003 Robert Kooima
   3  *
   4  * NEVERBALL is  free software; you can redistribute  it and/or modify
   5  * it under the  terms of the GNU General  Public License as published
   6  * by the Free  Software Foundation; either version 2  of the License,
   7  * or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT  ANY  WARRANTY;  without   even  the  implied  warranty  of
  11  * MERCHANTABILITY or  FITNESS FOR A PARTICULAR PURPOSE.   See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 #include <SDL.h>
  16 #include <SDL_mixer.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19 #include <stdio.h>
  20 #include <errno.h>
  21 #include <math.h>
  22
  23 #include "config.h"
  24 #include "glext.h"
  25 #include "vec3.h"
  26
  27 /*---------------------------------------------------------------------------*/
  28
  29 /* Define the mkdir symbol. */
  30
  31 #ifdef _WIN32
  32 #include <direct.h>
  33 #else
  34 #include <sys/stat.h>
  35 #endif
  36
  37 /*---------------------------------------------------------------------------*/
  38
  39 static int   option_d[CONFIG_OPTION_D_COUNT];
  40 static char *option_s[CONFIG_OPTION_S_COUNT];
  41
  42 static int dirty = 0;
  43
  44 /*---------------------------------------------------------------------------*/
  45
  46 static void config_key(const char *s, int i, int d)
  47 {
  48     int c;
  49
  50     config_set_d(i, d);
  51
  52     for (c = 0; c < SDLK_LAST; c++)
  53         if (strcmp(s, SDL_GetKeyName(c)) == 0)
  54         {
  55             config_set_d(i, c);
  56             break;
  57         }
  58 }
  59
  60 /*---------------------------------------------------------------------------*/
  61
  62 void config_init(void)
  63 {
  64     memset(option_d, 0, CONFIG_OPTION_D_COUNT * sizeof (int));
  65     memset(option_s, 0, CONFIG_OPTION_S_COUNT * sizeof (char *));
  66
  67     config_set_d(CONFIG_FULLSCREEN,           DEFAULT_FULLSCREEN);
  68     config_set_d(CONFIG_WIDTH,                DEFAULT_WIDTH);
  69     config_set_d(CONFIG_HEIGHT,               DEFAULT_HEIGHT);
  70     config_set_d(CONFIG_STEREO,               DEFAULT_STEREO);
  71     config_set_d(CONFIG_CAMERA,               DEFAULT_CAMERA);
  72     config_set_d(CONFIG_TEXTURES,             DEFAULT_TEXTURES);
  73     config_set_d(CONFIG_GEOMETRY,             DEFAULT_GEOMETRY);
  74     config_set_d(CONFIG_REFLECTION,           DEFAULT_REFLECTION);
  75     config_set_d(CONFIG_BACKGROUND,           DEFAULT_BACKGROUND);
  76     config_set_d(CONFIG_SHADOW,               DEFAULT_SHADOW);
  77     config_set_d(CONFIG_AUDIO_RATE,           DEFAULT_AUDIO_RATE);
  78     config_set_d(CONFIG_AUDIO_BUFF,           DEFAULT_AUDIO_BUFF);
  79     config_set_d(CONFIG_MOUSE_SENSE,          DEFAULT_MOUSE_SENSE);
  80     config_set_d(CONFIG_MOUSE_INVERT,         DEFAULT_MOUSE_INVERT);
  81     config_set_d(CONFIG_NICE,                 DEFAULT_NICE);
  82     config_set_d(CONFIG_FPS,                  DEFAULT_FPS);
  83     config_set_d(CONFIG_SOUND_VOLUME,         DEFAULT_SOUND_VOLUME);
  84     config_set_d(CONFIG_MUSIC_VOLUME,         DEFAULT_MUSIC_VOLUME);
  85     config_set_d(CONFIG_JOYSTICK,             DEFAULT_JOYSTICK);
  86     config_set_d(CONFIG_JOYSTICK_DEVICE,      DEFAULT_JOYSTICK_DEVICE);
  87     config_set_d(CONFIG_JOYSTICK_AXIS_X,      DEFAULT_JOYSTICK_AXIS_X);
  88     config_set_d(CONFIG_JOYSTICK_AXIS_Y,      DEFAULT_JOYSTICK_AXIS_Y);
  89     config_set_d(CONFIG_JOYSTICK_BUTTON_A,    DEFAULT_JOYSTICK_BUTTON_A);
  90     config_set_d(CONFIG_JOYSTICK_BUTTON_B,    DEFAULT_JOYSTICK_BUTTON_B);
  91     config_set_d(CONFIG_JOYSTICK_BUTTON_L,    DEFAULT_JOYSTICK_BUTTON_L);
  92     config_set_d(CONFIG_JOYSTICK_BUTTON_R,    DEFAULT_JOYSTICK_BUTTON_R);
  93     config_set_d(CONFIG_JOYSTICK_BUTTON_EXIT, DEFAULT_JOYSTICK_BUTTON_EXIT);
  94     config_set_d(CONFIG_JOYSTICK_CAMERA_1,    DEFAULT_JOYSTICK_CAMERA_1);
  95     config_set_d(CONFIG_JOYSTICK_CAMERA_2,    DEFAULT_JOYSTICK_CAMERA_2);
  96     config_set_d(CONFIG_JOYSTICK_CAMERA_3,    DEFAULT_JOYSTICK_CAMERA_3);
  97     config_set_d(CONFIG_KEY_CAMERA_1,         DEFAULT_KEY_CAMERA_1);
  98     config_set_d(CONFIG_KEY_CAMERA_2,         DEFAULT_KEY_CAMERA_2);
  99     config_set_d(CONFIG_KEY_CAMERA_3,         DEFAULT_KEY_CAMERA_3);
 100     config_set_d(CONFIG_KEY_CAMERA_R,         DEFAULT_KEY_CAMERA_R);
 101     config_set_d(CONFIG_KEY_CAMERA_L,         DEFAULT_KEY_CAMERA_L);
 102     config_set_d(CONFIG_VIEW_FOV,             DEFAULT_VIEW_FOV);
 103     config_set_d(CONFIG_VIEW_DP,              DEFAULT_VIEW_DP);
 104     config_set_d(CONFIG_VIEW_DC,              DEFAULT_VIEW_DC);
 105     config_set_d(CONFIG_VIEW_DZ,              DEFAULT_VIEW_DZ);
 106     config_set_d(CONFIG_ROTATE_FAST,          DEFAULT_ROTATE_FAST);
 107     config_set_d(CONFIG_ROTATE_SLOW,          DEFAULT_ROTATE_SLOW);
 108     config_set_d(CONFIG_LAST_SET,             DEFAULT_LAST_SET);
 109     config_set_d(CONFIG_MODE,                 DEFAULT_MODE);
 110     config_set_d(CONFIG_CHEAT,                DEFAULT_CHEAT);
 111     config_set_s(CONFIG_PLAYER,               DEFAULT_PLAYER);
 112     config_set_s(CONFIG_BALL,                 DEFAULT_BALL);
 113     config_set_s(CONFIG_BALL_BONUS,           DEFAULT_BALL_BONUS);
 114     config_set_s(CONFIG_COIN,                 DEFAULT_COIN);
 115     config_set_s(CONFIG_LANG,                 DEFAULT_LANG);
 116 }
 117
 118 void config_load(void)
 119 {
 120     FILE *fp;
 121
 122     if ((fp = fopen(config_user(USER_CONFIG_FILE), "r")))
 123     {
 124         char buf[MAXSTR];
 125         char key[MAXSTR];
 126         char val[MAXSTR];
 127
 128         while (fgets(buf, MAXSTR, fp))
 129             if (sscanf(buf, "%s %s", key, val) == 2)
 130             {
 131                 if      (strcmp(key, "fullscreen")            == 0)
 132                     config_set_d(CONFIG_FULLSCREEN,           atoi(val));
 133                 else if (strcmp(key, "width")                 == 0)
 134                     config_set_d(CONFIG_WIDTH,                atoi(val));
 135                 else if (strcmp(key, "height")                == 0)
 136                     config_set_d(CONFIG_HEIGHT,               atoi(val));
 137                 else if (strcmp(key, "stereo")                == 0)
 138                     config_set_d(CONFIG_STEREO,               atoi(val));
 139                 else if (strcmp(key, "camera")                == 0)
 140                     config_set_d(CONFIG_CAMERA,               atoi(val));
 141                 else if (strcmp(key, "textures")              == 0)
 142                     config_set_d(CONFIG_TEXTURES,             atoi(val));
 143                 else if (strcmp(key, "geometry")              == 0)
 144                     config_set_d(CONFIG_GEOMETRY,             atoi(val));
 145                 else if (strcmp(key, "reflection")            == 0)
 146                     config_set_d(CONFIG_REFLECTION,           atoi(val));
 147                 else if (strcmp(key, "background")            == 0)
 148                     config_set_d(CONFIG_BACKGROUND,           atoi(val));
 149                 else if (strcmp(key, "shadow")                == 0)
 150                     config_set_d(CONFIG_SHADOW,               atoi(val));
 151                 else if (strcmp(key, "audio_rate")            == 0)
 152                     config_set_d(CONFIG_AUDIO_RATE,           atoi(val));
 153                 else if (strcmp(key, "audio_buff")            == 0)
 154                     config_set_d(CONFIG_AUDIO_BUFF,           atoi(val));
 155                 else if (strcmp(key, "mouse_sense")           == 0)
 156                     config_set_d(CONFIG_MOUSE_SENSE,          atoi(val));
 157                 else if (strcmp(key, "mouse_invert")          == 0)
 158                     config_set_d(CONFIG_MOUSE_INVERT,         atoi(val));
 159                 else if (strcmp(key, "nice")                  == 0)
 160                     config_set_d(CONFIG_NICE,                 atoi(val));
 161                 else if (strcmp(key, "fps")                   == 0)
 162                     config_set_d(CONFIG_FPS,                  atoi(val));
 163                 else if (strcmp(key, "sound_volume")          == 0)
 164                     config_set_d(CONFIG_SOUND_VOLUME,         atoi(val));
 165                 else if (strcmp(key, "music_volume")          == 0)
 166                     config_set_d(CONFIG_MUSIC_VOLUME,         atoi(val));
 167                 else if (strcmp(key, "joystick")              == 0)
 168                     config_set_d(CONFIG_JOYSTICK,             atoi(val));
 169                 else if (strcmp(key, "joystick_device")       == 0)
 170                     config_set_d(CONFIG_JOYSTICK_DEVICE,      atoi(val));
 171                 else if (strcmp(key, "joystick_axis_x")       == 0)
 172                     config_set_d(CONFIG_JOYSTICK_AXIS_X,      atoi(val));
 173                 else if (strcmp(key, "joystick_axis_y")       == 0)
 174                     config_set_d(CONFIG_JOYSTICK_AXIS_Y,      atoi(val));
 175                 else if (strcmp(key, "joystick_button_a")     == 0)
 176                     config_set_d(CONFIG_JOYSTICK_BUTTON_A,    atoi(val));
 177                 else if (strcmp(key, "joystick_button_b")     == 0)
 178                     config_set_d(CONFIG_JOYSTICK_BUTTON_B,    atoi(val));
 179                 else if (strcmp(key, "joystick_button_r")     == 0)
 180                     config_set_d(CONFIG_JOYSTICK_BUTTON_R,    atoi(val));
 181                 else if (strcmp(key, "joystick_button_l")     == 0)
 182                     config_set_d(CONFIG_JOYSTICK_BUTTON_L,    atoi(val));
 183                 else if (strcmp(key, "joystick_button_exit")  == 0)
 184                     config_set_d(CONFIG_JOYSTICK_BUTTON_EXIT, atoi(val));
 185                 else if (strcmp(key, "joystick_camera_1")     == 0)
 186                     config_set_d(CONFIG_JOYSTICK_CAMERA_1,    atoi(val));
 187                 else if (strcmp(key, "joystick_camera_2")     == 0)
 188                     config_set_d(CONFIG_JOYSTICK_CAMERA_2,    atoi(val));
 189                 else if (strcmp(key, "joystick_camera_3")     == 0)
 190                     config_set_d(CONFIG_JOYSTICK_CAMERA_3,    atoi(val));
 191                 else if (strcmp(key, "view_fov")              == 0)
 192                     config_set_d(CONFIG_VIEW_FOV,             atoi(val));
 193                 else if (strcmp(key, "view_dp")               == 0)
 194                     config_set_d(CONFIG_VIEW_DP,              atoi(val));
 195                 else if (strcmp(key, "view_dc")               == 0)
 196                     config_set_d(CONFIG_VIEW_DC,              atoi(val));
 197                 else if (strcmp(key, "view_dz")               == 0)
 198                     config_set_d(CONFIG_VIEW_DZ,              atoi(val));
 199                 else if (strcmp(key, "rotate_fast")           == 0)
 200                     config_set_d(CONFIG_ROTATE_FAST,          atoi(val));
 201                 else if (strcmp(key, "rotate_slow")           == 0)
 202                     config_set_d(CONFIG_ROTATE_SLOW,          atoi(val));
 203                 else if (strcmp(key, "last_set")              == 0)
 204                     config_set_d(CONFIG_LAST_SET,             atoi(val));
 205                 else if (strcmp(key, "mode")                  == 0)
 206                     config_set_d(CONFIG_MODE,                 atoi(val));
 207                 else if (strcmp(key, "cheat")                 == 0 && ALLOW_CHEAT)
 208                     config_set_d(CONFIG_CHEAT,                atoi(val));
 209
 210                 else if (strcmp(key, "key_camera_1")  == 0)
 211                     config_key(val, CONFIG_KEY_CAMERA_1, DEFAULT_KEY_CAMERA_1);
 212                 else if (strcmp(key, "key_camera_2")  == 0)
 213                     config_key(val, CONFIG_KEY_CAMERA_2, DEFAULT_KEY_CAMERA_2);
 214                 else if (strcmp(key, "key_camera_3")  == 0)
 215                     config_key(val, CONFIG_KEY_CAMERA_3, DEFAULT_KEY_CAMERA_3);
 216                 else if (strcmp(key, "key_camera_r")  == 0)
 217                     config_key(val, CONFIG_KEY_CAMERA_R, DEFAULT_KEY_CAMERA_R);
 218                 else if (strcmp(key, "key_camera_l")  == 0)
 219                     config_key(val, CONFIG_KEY_CAMERA_L, DEFAULT_KEY_CAMERA_L);
 220
 221                 else if (strcmp(key, "player") == 0)
 222                     config_set_s(CONFIG_PLAYER, val);
 223                 else if (strcmp(key, "ball")   == 0)
 224                     config_set_s(CONFIG_BALL,   val);
 225                 else if (strcmp(key, "ball_bonus")   == 0)
 226                     config_set_s(CONFIG_BALL_BONUS,   val);
 227                 else if (strcmp(key, "coin")   == 0)
 228                     config_set_s(CONFIG_COIN,   val);
 229                 else if (strcmp(key, "lang")   == 0)
 230                     config_set_s(CONFIG_LANG,   val);
 231             }
 232
 233         fclose(fp);
 234
 235         dirty = 0;
 236     }
 237 }
 238
 239 void config_save(void)
 240 {
 241     FILE *fp;
 242
 243     if (dirty && (fp = fopen(config_user(USER_CONFIG_FILE), "w")))
 244     {
 245         fprintf(fp, "fullscreen           %d\n",
 246                 option_d[CONFIG_FULLSCREEN]);
 247         fprintf(fp, "width                %d\n",
 248                 option_d[CONFIG_WIDTH]);
 249         fprintf(fp, "height               %d\n",
 250                 option_d[CONFIG_HEIGHT]);
 251         fprintf(fp, "stereo               %d\n",
 252                 option_d[CONFIG_STEREO]);
 253         fprintf(fp, "camera               %d\n",
 254                 option_d[CONFIG_CAMERA]);
 255         fprintf(fp, "textures             %d\n",
 256                 option_d[CONFIG_TEXTURES]);
 257         fprintf(fp, "geometry             %d\n",
 258                 option_d[CONFIG_GEOMETRY]);
 259         fprintf(fp, "reflection           %d\n",
 260                 option_d[CONFIG_REFLECTION]);
 261         fprintf(fp, "background           %d\n",
 262                 option_d[CONFIG_BACKGROUND]);
 263         fprintf(fp, "shadow               %d\n",
 264                 option_d[CONFIG_SHADOW]);
 265         fprintf(fp, "audio_rate           %d\n",
 266                 option_d[CONFIG_AUDIO_RATE]);
 267         fprintf(fp, "audio_buff           %d\n",
 268                 option_d[CONFIG_AUDIO_BUFF]);
 269         fprintf(fp, "mouse_sense          %d\n",
 270                 option_d[CONFIG_MOUSE_SENSE]);
 271         fprintf(fp, "mouse_invert         %d\n",
 272                 option_d[CONFIG_MOUSE_INVERT]);
 273         fprintf(fp, "nice                 %d\n",
 274                 option_d[CONFIG_NICE]);
 275         fprintf(fp, "fps                  %d\n",
 276                 option_d[CONFIG_FPS]);
 277         fprintf(fp, "sound_volume         %d\n",
 278                 option_d[CONFIG_SOUND_VOLUME]);
 279         fprintf(fp, "music_volume         %d\n",
 280                 option_d[CONFIG_MUSIC_VOLUME]);
 281         fprintf(fp, "joystick             %d\n",
 282                 option_d[CONFIG_JOYSTICK]);
 283         fprintf(fp, "joystick_device      %d\n",
 284                 option_d[CONFIG_JOYSTICK_DEVICE]);
 285         fprintf(fp, "joystick_axis_x      %d\n",
 286                 option_d[CONFIG_JOYSTICK_AXIS_X]);
 287         fprintf(fp, "joystick_axis_y      %d\n",
 288                 option_d[CONFIG_JOYSTICK_AXIS_Y]);
 289         fprintf(fp, "joystick_button_a    %d\n",
 290                 option_d[CONFIG_JOYSTICK_BUTTON_A]);
 291         fprintf(fp, "joystick_button_b    %d\n",
 292                 option_d[CONFIG_JOYSTICK_BUTTON_B]);
 293         fprintf(fp, "joystick_button_r    %d\n",
 294                 option_d[CONFIG_JOYSTICK_BUTTON_R]);
 295         fprintf(fp, "joystick_button_l    %d\n",
 296                 option_d[CONFIG_JOYSTICK_BUTTON_L]);
 297         fprintf(fp, "joystick_button_exit %d\n",
 298                 option_d[CONFIG_JOYSTICK_BUTTON_EXIT]);
 299         fprintf(fp, "joystick_camera_1    %d\n",
 300                 option_d[CONFIG_JOYSTICK_CAMERA_1]);
 301         fprintf(fp, "joystick_camera_2    %d\n",
 302                 option_d[CONFIG_JOYSTICK_CAMERA_2]);
 303         fprintf(fp, "joystick_camera_3    %d\n",
 304                 option_d[CONFIG_JOYSTICK_CAMERA_3]);
 305         fprintf(fp, "view_fov             %d\n",
 306                 option_d[CONFIG_VIEW_FOV]);
 307         fprintf(fp, "view_dp              %d\n",
 308                 option_d[CONFIG_VIEW_DP]);
 309         fprintf(fp, "view_dc              %d\n",
 310                 option_d[CONFIG_VIEW_DC]);
 311         fprintf(fp, "view_dz              %d\n",
 312                 option_d[CONFIG_VIEW_DZ]);
 313         fprintf(fp, "rotate_fast          %d\n",
 314                 option_d[CONFIG_ROTATE_FAST]);
 315         fprintf(fp, "rotate_slow          %d\n",
 316                 option_d[CONFIG_ROTATE_SLOW]);
 317         fprintf(fp, "last_set             %d\n",
 318                 option_d[CONFIG_LAST_SET]);
 319         fprintf(fp, "mode                 %d\n",
 320                 option_d[CONFIG_MODE]);
 321         if (option_d[CONFIG_CHEAT])
 322         fprintf(fp, "cheat                %d\n",
 323                 option_d[CONFIG_CHEAT]);
 324
 325         fprintf(fp, "key_camera_1         %s\n",
 326                 SDL_GetKeyName(option_d[CONFIG_KEY_CAMERA_1]));
 327         fprintf(fp, "key_camera_2         %s\n",
 328                 SDL_GetKeyName(option_d[CONFIG_KEY_CAMERA_2]));
 329         fprintf(fp, "key_camera_3         %s\n",
 330                 SDL_GetKeyName(option_d[CONFIG_KEY_CAMERA_3]));
 331         fprintf(fp, "key_camera_r         %s\n",
 332                 SDL_GetKeyName(option_d[CONFIG_KEY_CAMERA_R]));
 333         fprintf(fp, "key_camera_l         %s\n",
 334                 SDL_GetKeyName(option_d[CONFIG_KEY_CAMERA_L]));
 335
 336         fprintf(fp, "player               %s\n", option_s[CONFIG_PLAYER]);
 337         fprintf(fp, "ball                 %s\n", option_s[CONFIG_BALL]);
 338         fprintf(fp, "ball_bonus           %s\n", option_s[CONFIG_BALL_BONUS]);
 339         fprintf(fp, "coin                 %s\n", option_s[CONFIG_COIN]);
 340         fprintf(fp, "lang                 %s\n", option_s[CONFIG_LANG]);
 341
 342         fclose(fp);
 343     }
 344
 345     dirty = 0;
 346 }
 347
 348 /*---------------------------------------------------------------------------*/
 349
 350 int config_mode(int f, int w, int h)
 351 {
 352     int stereo  = config_get_d(CONFIG_STEREO)     ? 1 : 0;
 353     int stencil = config_get_d(CONFIG_REFLECTION) ? 1 : 0;
 354
 355     SDL_GL_SetAttribute(SDL_GL_STEREO,       stereo);
 356     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, stencil);
 357
 358     /* Try to set the currently specified mode. */
 359
 360     if (SDL_SetVideoMode(w, h, 0, SDL_OPENGL | (f ? SDL_FULLSCREEN : 0)))
 361     {
 362         config_set_d(CONFIG_FULLSCREEN, f);
 363         config_set_d(CONFIG_WIDTH, w);
 364         config_set_d(CONFIG_HEIGHT, h);
 365
 366         glViewport(0, 0, w, h);
 367         glClearColor(0.0f, 0.0f, 0.1f, 0.0f);
 368
 369         glEnable(GL_NORMALIZE);
 370         glEnable(GL_CULL_FACE);
 371         glEnable(GL_DEPTH_TEST);
 372         glEnable(GL_TEXTURE_2D);
 373         glEnable(GL_LIGHTING);
 374
 375         return 1;
 376     }
 377
 378     /* If the mode failed, try it without stereo. */
 379
 380     else if (stereo)
 381     {
 382         config_set_d(CONFIG_STEREO, 0);
 383         return config_mode(f, w, h);
 384     }
 385
 386     /* If that mode failed, try it without reflections. */
 387
 388     else if (stencil)
 389     {
 390         config_set_d(CONFIG_REFLECTION, 0);
 391         return config_mode(f, w, h);
 392     }
 393
 394     /* If THAT mode failed, punt. */
 395
 396     return 0;
 397 }
 398
 399 /*---------------------------------------------------------------------------*/
 400
 401 void config_set_d(int i, int d)
 402 {
 403     option_d[i] = d;
 404     dirty = 1;
 405 }
 406
 407 void config_tgl_d(int i)
 408 {
 409     option_d[i] = (option_d[i] ? 0 : 1);
 410     dirty = 1;
 411 }
 412
 413 int config_tst_d(int i, int d)
 414 {
 415     return (option_d[i] == d) ? 1 : 0;
 416 }
 417
 418 int config_get_d(int i)
 419 {
 420     return option_d[i];
 421 }
 422
 423 /*---------------------------------------------------------------------------*/
 424
 425 void config_set_s(int i, const char *src)
 426 {
 427     int len = (int) strlen(src);
 428
 429     if (option_s[i])
 430         free(option_s[i]);
 431
 432     if ((option_s[i] = (char *) malloc(len + 1)))
 433         strncpy(option_s[i], src, len + 1);
 434
 435     dirty = 1;
 436 }
 437
 438 void config_get_s(int i, char *dst, int len)
 439 {
 440     strncpy(dst, option_s[i], len);
 441 }
 442
 443 const char * config_simple_get_s(int i)
 444 {
 445         return option_s[i];
 446 }
 447
 448 /*---------------------------------------------------------------------------*/
 449
 450 static int grabbed = 0;
 451 static int paused  = 0;
 452
 453 void config_set_grab(void)
 454 {
 455     SDL_WarpMouse(config_get_d(CONFIG_WIDTH)  / 2,
 456                   config_get_d(CONFIG_HEIGHT) / 2);
 457     SDL_WM_GrabInput(SDL_GRAB_ON);
 458     SDL_ShowCursor(SDL_DISABLE);
 459     grabbed = 1;
 460 }
 461
 462 void config_clr_grab(void)
 463 {
 464     SDL_WM_GrabInput(SDL_GRAB_OFF);
 465     SDL_ShowCursor(SDL_ENABLE);
 466     grabbed = 0;
 467 }
 468
 469 int  config_get_grab(void)
 470 {
 471     return grabbed;
 472 }
 473
 474 int  config_get_pause(void)
 475 {
 476     return paused;
 477 }
 478
 479 void config_set_pause(void)
 480 {
 481     Mix_PauseMusic();
 482     paused = 1;
 483
 484     if (grabbed)
 485     {
 486         SDL_ShowCursor(SDL_ENABLE);
 487         SDL_WM_GrabInput(SDL_GRAB_OFF);
 488     }
 489 }
 490
 491 void config_clr_pause(void)
 492 {
 493     Mix_ResumeMusic();
 494     paused = 0;
 495
 496     if (grabbed)
 497     {
 498         SDL_WM_GrabInput(SDL_GRAB_ON);
 499         SDL_ShowCursor(SDL_DISABLE);
 500     }
 501 }
 502
 503 void config_tgl_pause(void)
 504 {
 505     if (paused)
 506         config_clr_pause();
 507     else
 508         config_set_pause();
 509 }
 510 /*---------------------------------------------------------------------------*/
 511
 512 void config_push_persp(float fov, float n, float f)
 513 {
 514     GLdouble m[4][4];
 515
 516     GLdouble r = fov / 2 * V_PI / 180;
 517     GLdouble s = sin(r);
 518     GLdouble c = cos(r) / s;
 519
 520     GLdouble a = ((GLdouble) option_d[CONFIG_WIDTH] /
 521                   (GLdouble) option_d[CONFIG_HEIGHT]);
 522
 523     glMatrixMode(GL_PROJECTION);
 524     {
 525         glPushMatrix();
 526         glLoadIdentity();
 527
 528         m[0][0] =  c/a;
 529         m[0][1] =  0.0;
 530         m[0][2] =  0.0;
 531         m[0][3] =  0.0;
 532         m[1][0] =  0.0;
 533         m[1][1] =    c;
 534         m[1][2] =  0.0;
 535         m[1][3] =  0.0;
 536         m[2][0] =  0.0;
 537         m[2][1] =  0.0;
 538         m[2][2] = -(f + n) / (f - n);
 539         m[2][3] = -1.0;
 540         m[3][0] =  0.0;
 541         m[3][1] =  0.0;
 542         m[3][2] = -2.0 * n * f / (f - n);
 543         m[3][3] =  0.0;
 544
 545         glMultMatrixd(&m[0][0]);
 546     }
 547     glMatrixMode(GL_MODELVIEW);
 548 }
 549
 550 void config_push_ortho(void)
 551 {
 552     GLdouble w = (GLdouble) option_d[CONFIG_WIDTH];
 553     GLdouble h = (GLdouble) option_d[CONFIG_HEIGHT];
 554
 555     glMatrixMode(GL_PROJECTION);
 556     {
 557         glPushMatrix();
 558         glLoadIdentity();
 559         glOrtho(0.0, w, 0.0, h, -1.0, +1.0);
 560     }
 561     glMatrixMode(GL_MODELVIEW);
 562 }
 563
 564 void config_pop_matrix(void)
 565 {
 566     glMatrixMode(GL_PROJECTION);
 567     {
 568         glPopMatrix();
 569     }
 570     glMatrixMode(GL_MODELVIEW);
 571 }
 572
 573 void config_clear(void)
 574 {
 575     if (option_d[CONFIG_REFLECTION])
 576         glClear(GL_COLOR_BUFFER_BIT |
 577                 GL_DEPTH_BUFFER_BIT |
 578                 GL_STENCIL_BUFFER_BIT);
 579     else
 580         glClear(GL_COLOR_BUFFER_BIT |
 581                 GL_DEPTH_BUFFER_BIT);
 582 }
 583
 584 /*---------------------------------------------------------------------------*/