src/sdl2/main.c

   1 /* Copyright (C) 2020 SovietPony
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, version 3 of the License ONLY.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  */
  15
  16 #ifdef __EMSCRIPTEN__
  17 #  include <emscripten.h>
  18 #endif
  19
  20 #include <SDL2/SDL.h>
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include <stdlib.h> // srand exit
  24 #include <string.h> // strcasecmp
  25 #include <assert.h>
  26 #include "system.h"
  27 #include "input.h"
  28
  29 #include "cp866.h"
  30
  31 #include "my.h" // fexists
  32 #include "player.h" // pl1 pl2
  33 #include "menu.h" // G_keyf
  34 #include "error.h" // logo
  35 #include "monster.h" // nomon
  36
  37 #include "files.h" // F_startup F_addwad F_initwads F_allocres
  38 #include "config.h" // CFG_args CFG_load CFG_save
  39 #include "args.h" // ARG_parse
  40 #include "memory.h" // M_startup
  41 #include "game.h" // G_init G_act
  42 #include "sound.h" // S_init S_done
  43 #include "music.h" // S_initmusic S_updatemusic S_donemusic
  44 #include "render.h" // R_init R_draw R_done
  45
  46 #define TITLE_STR "Doom 2D (SDL2)"
  47
  48 static Uint32 ticks;
  49 static int quit = 0;
  50 static SDL_Window *window;
  51 static SDL_GLContext context;
  52 static SDL_Surface *surf;
  53 static videomode_t vlist;
  54
  55 static const cfg_t arg[] = {
  56   {"file", NULL, Y_FILES},
  57   {"cheat", &cheat, Y_SW_ON},
  58 //  {"vga", &shot_vga, Y_SW_ON},
  59 //  {"musvol", &mus_vol, Y_WORD},
  60   {"mon", &nomon, Y_SW_OFF},
  61   {"warp", &_warp, Y_BYTE},
  62 //  {"config", NULL, cfg_file, Y_STRING},
  63   {NULL, NULL, 0} // end
  64 };
  65
  66 static const cfg_t cfg[] = {
  67 //  {"screenshot", &shot_vga, Y_SW_ON},
  68 //  {"music_volume", &mus_vol, Y_WORD},
  69 //  {"music_random", &music_random, Y_SW_ON},
  70 //  {"music_time", &music_time, Y_DWORD},
  71 //  {"music_fade", &music_fade, Y_DWORD},
  72   {"pl1_left", &pl1.kl, Y_KEY},
  73   {"pl1_right",&pl1.kr, Y_KEY},
  74   {"pl1_up", &pl1.ku, Y_KEY},
  75   {"pl1_down", &pl1.kd, Y_KEY},
  76   {"pl1_jump", &pl1.kj, Y_KEY},
  77   {"pl1_fire", &pl1.kf, Y_KEY},
  78   {"pl1_next", &pl1.kwr, Y_KEY},
  79   {"pl1_prev", &pl1.kwl, Y_KEY},
  80   {"pl1_use", &pl1.kp, Y_KEY},
  81   {"pl2_left", &pl2.kl, Y_KEY},
  82   {"pl2_right", &pl2.kr, Y_KEY},
  83   {"pl2_up", &pl2.ku, Y_KEY},
  84   {"pl2_down", &pl2.kd, Y_KEY},
  85   {"pl2_jump", &pl2.kj, Y_KEY},
  86   {"pl2_fire", &pl2.kf, Y_KEY},
  87   {"pl2_next", &pl2.kwr, Y_KEY},
  88   {"pl2_prev", &pl2.kwl, Y_KEY},
  89   {"pl2_use", &pl2.kp, Y_KEY},
  90   {NULL, NULL, 0} // end
  91 };
  92
  93 static void CFG_args (int argc, char **argv) {
  94   const cfg_t *list[] = { arg, R_args(), S_args(), MUS_args() };
  95   ARG_parse(argc, argv, 4, list);
  96 }
  97
  98 static void CFG_load (void) {
  99   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 100   CFG_read_config("default.cfg", 4, list);
 101   CFG_read_config("doom2d.cfg", 4, list);
 102 }
 103
 104 static void CFG_save (void) {
 105   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 106   CFG_update_config("doom2d.cfg", "doom2d.cfg", 4, list, "generated by doom2d, do not modify");
 107 }
 108
 109 /* --- error.h --- */
 110
 111 void logo (const char *s, ...) {
 112   va_list ap;
 113   va_start(ap, s);
 114   vprintf(s, ap);
 115   va_end(ap);
 116   fflush(stdout);
 117 }
 118
 119 void logo_gas (int cur, int all) {
 120   // stub
 121 }
 122
 123 void ERR_failinit (char *s, ...) {
 124   va_list ap;
 125   va_start(ap, s);
 126   vprintf(s, ap);
 127   va_end(ap);
 128   puts("");
 129   exit(1);
 130 }
 131
 132 void ERR_fatal (char *s, ...) {
 133   va_list ap;
 134   R_done();
 135   MUS_done();
 136   S_done();
 137   M_shutdown();
 138   SDL_Quit();
 139   puts("\nCRITICAL ERROR:");
 140   va_start(ap, s);
 141   vprintf(s, ap);
 142   va_end(ap);
 143   puts("");
 144   exit(1);
 145 }
 146
 147 void ERR_quit (void) {
 148   quit = 1;
 149 }
 150
 151 /* --- system.h --- */
 152
 153 static int Y_resize_window (int w, int h, int fullscreen) {
 154   assert(w > 0);
 155   assert(h > 0);
 156   assert(window != NULL);
 157   if (surf != NULL) {
 158     if (surf->w != w || surf->h != h) {
 159       SDL_Surface *s = SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0);
 160       if (s != NULL) {
 161         SDL_SetPaletteColors(s->format->palette, surf->format->palette->colors, 0, surf->format->palette->ncolors);
 162         SDL_FreeSurface(surf);
 163         surf = s;
 164       }
 165     }
 166   }
 167   SDL_SetWindowSize(window, w, h);
 168   Y_set_fullscreen(fullscreen);
 169   return 1;
 170 }
 171
 172 int Y_set_videomode_opengl (int w, int h, int fullscreen) {
 173   assert(w > 0);
 174   assert(h > 0);
 175   Uint32 flags;
 176   SDL_Window *win;
 177   SDL_GLContext ctx;
 178   if (window != NULL && context != NULL) {
 179     Y_resize_window(w, h, fullscreen);
 180     win = window;
 181   } else {
 182     flags = SDL_WINDOW_RESIZABLE | SDL_WINDOW_OPENGL;
 183     if (fullscreen) {
 184       flags = flags | SDL_WINDOW_FULLSCREEN;
 185     }
 186     // TODO set context version and type
 187 #ifdef __EMSCRIPTEN__
 188     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
 189     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
 190     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
 191 #else
 192     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
 193     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
 194 #endif
 195     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 196     win = SDL_CreateWindow(TITLE_STR, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w, h, flags);
 197     if (win != NULL) {
 198       ctx = SDL_GL_CreateContext(win);
 199       if (ctx != NULL) {
 200         Y_unset_videomode();
 201         window = win;
 202         context = ctx;
 203         SDL_GL_MakeCurrent(window, context);
 204       } else {
 205         SDL_DestroyWindow(win);
 206         win = NULL;
 207       }
 208     }
 209   }
 210   if (win == NULL) {
 211     logo("Y_set_videomode_opengl: error: %s\n", SDL_GetError());
 212   }
 213   return win != NULL;
 214 }
 215
 216 int Y_set_videomode_software (int w, int h, int fullscreen) {
 217   assert(w > 0);
 218   assert(h > 0);
 219   Uint32 flags;
 220   SDL_Surface *s;
 221   SDL_Window *win;
 222   if (window != NULL && surf != NULL) {
 223     Y_resize_window(w, h, fullscreen);
 224     win = window;
 225   } else {
 226     flags = SDL_WINDOW_RESIZABLE;
 227     if (fullscreen) {
 228       flags = flags | SDL_WINDOW_FULLSCREEN;
 229     }
 230     win = SDL_CreateWindow(TITLE_STR, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, w, h, flags);
 231     if (win != NULL) {
 232       s = SDL_CreateRGBSurface(0, w, h, 8, 0, 0, 0, 0);
 233       if (s != NULL) {
 234         Y_unset_videomode();
 235         window = win;
 236         surf = s;
 237       } else {
 238         SDL_DestroyWindow(win);
 239         win = NULL;
 240       }
 241     }
 242   }
 243   if (win == NULL) {
 244     logo("Y_set_videomode_software: error: %s\n", SDL_GetError());
 245   }
 246   return win != NULL;
 247 }
 248
 249 void Y_get_videomode (int *w, int *h) {
 250   if (window != NULL) {
 251     SDL_GetWindowSize(window, w, h);
 252   } else {
 253     *w = 0;
 254     *h = 0;
 255   }
 256 }
 257
 258 int Y_videomode_setted (void) {
 259   return window != NULL;
 260 }
 261
 262 void Y_unset_videomode (void) {
 263   if (window != NULL) {
 264     if (context != NULL) {
 265       SDL_GL_MakeCurrent(window, NULL);
 266       SDL_GL_DeleteContext(context);
 267       context = NULL;
 268     }
 269     if (surf != NULL) {
 270       SDL_FreeSurface(surf);
 271       surf = NULL;
 272     }
 273     SDL_DestroyWindow(window);
 274     window = NULL;
 275   }
 276 }
 277
 278 static void init_videomode_list (void) {
 279   int i, j, k;
 280   SDL_DisplayMode m;
 281   int n = SDL_GetNumDisplayModes(0);
 282   if (vlist.modes != NULL) {
 283     free(vlist.modes);
 284     vlist.modes = NULL;
 285     vlist.n = 0;
 286   }
 287   if (n > 0) {
 288     vlist.modes = malloc(n * sizeof(videomode_size_t));
 289     if (vlist.modes != NULL) {
 290       j = 0;
 291       for (i = 0; i < n; i++) {
 292         SDL_GetDisplayMode(0, i, &m);
 293         k = 0;
 294         while (k < j && (m.w != vlist.modes[k].w || m.h != vlist.modes[k].h)) {
 295           k++;
 296         }
 297         if (k >= j) {
 298           vlist.modes[j] = (videomode_size_t) {
 299             .w = m.w,
 300             .h = m.h
 301           };
 302           j++;
 303         }
 304       }
 305       vlist.n = j;
 306     }
 307   }
 308 }
 309
 310 const videomode_t *Y_get_videomode_list_opengl (int fullscreen) {
 311   init_videomode_list();
 312   return &vlist;
 313 }
 314
 315 const videomode_t *Y_get_videomode_list_software (int fullscreen) {
 316   init_videomode_list();
 317   return &vlist;
 318 }
 319
 320 void Y_set_fullscreen (int yes) {
 321   if (window != NULL) {
 322     SDL_SetWindowFullscreen(window, yes ? SDL_WINDOW_FULLSCREEN : 0);
 323   }
 324 }
 325
 326 int Y_get_fullscreen (void) {
 327   return (window != NULL) && (SDL_GetWindowFlags(window) & SDL_WINDOW_FULLSCREEN);
 328 }
 329
 330 void Y_swap_buffers (void) {
 331   assert(window != NULL);
 332   assert(context != NULL);
 333   SDL_GL_SwapWindow(window);
 334 }
 335
 336 void Y_get_buffer (byte **buf, int *w, int *h, int *pitch) {
 337   assert(window != NULL);
 338   assert(surf != NULL);
 339   *buf = surf->pixels;
 340   *w = surf->w;
 341   *h = surf->h;
 342   *pitch = surf->pitch;
 343 }
 344
 345 void Y_set_vga_palette (byte *vgapal) {
 346   assert(window != NULL);
 347   assert(surf != NULL);
 348   int i;
 349   byte *p = vgapal;
 350   SDL_Color colors[256];
 351   for (i = 0; i < 256; i++) {
 352     colors[i] = (SDL_Color) {
 353       .r = p[0] * 255 / 63,
 354       .g = p[1] * 255 / 63,
 355       .b = p[2] * 255 / 63
 356     };
 357     p += 3;
 358   }
 359   SDL_SetPaletteColors(surf->format->palette, colors, 0, 256);
 360 }
 361
 362 void Y_repaint_rect (int x, int y, int w, int h) {
 363   assert(window != NULL);
 364   assert(surf != NULL);
 365   SDL_Surface *s = SDL_GetWindowSurface(window);
 366   SDL_Rect r = (SDL_Rect) {
 367     .x = x,
 368     .y = y,
 369     .w = w,
 370     .h = h
 371   };
 372   SDL_BlitSurface(surf, &r, s, &r);
 373   SDL_UpdateWindowSurfaceRects(window, &r, 1);
 374 }
 375
 376 void Y_repaint (void) {
 377   Y_repaint_rect(0, 0, surf->w, surf->h);
 378 }
 379
 380 void Y_enable_text_input (void) {
 381   SDL_StartTextInput();
 382 }
 383
 384 void Y_disable_text_input (void) {
 385   SDL_StopTextInput();
 386 }
 387
 388 /* --- main --- */
 389
 390 static int sdl_to_key (int code) {
 391   switch (code) {
 392     case SDL_SCANCODE_0: return KEY_0;
 393     case SDL_SCANCODE_1: return KEY_1;
 394     case SDL_SCANCODE_2: return KEY_2;
 395     case SDL_SCANCODE_3: return KEY_3;
 396     case SDL_SCANCODE_4: return KEY_4;
 397     case SDL_SCANCODE_5: return KEY_5;
 398     case SDL_SCANCODE_6: return KEY_6;
 399     case SDL_SCANCODE_7: return KEY_7;
 400     case SDL_SCANCODE_8: return KEY_8;
 401     case SDL_SCANCODE_9: return KEY_9;
 402     case SDL_SCANCODE_A: return KEY_A;
 403     case SDL_SCANCODE_B: return KEY_B;
 404     case SDL_SCANCODE_C: return KEY_C;
 405     case SDL_SCANCODE_D: return KEY_D;
 406     case SDL_SCANCODE_E: return KEY_E;
 407     case SDL_SCANCODE_F: return KEY_F;
 408     case SDL_SCANCODE_G: return KEY_G;
 409     case SDL_SCANCODE_H: return KEY_H;
 410     case SDL_SCANCODE_I: return KEY_I;
 411     case SDL_SCANCODE_J: return KEY_J;
 412     case SDL_SCANCODE_K: return KEY_K;
 413     case SDL_SCANCODE_L: return KEY_L;
 414     case SDL_SCANCODE_M: return KEY_M;
 415     case SDL_SCANCODE_N: return KEY_N;
 416     case SDL_SCANCODE_O: return KEY_O;
 417     case SDL_SCANCODE_P: return KEY_P;
 418     case SDL_SCANCODE_Q: return KEY_Q;
 419     case SDL_SCANCODE_R: return KEY_R;
 420     case SDL_SCANCODE_S: return KEY_S;
 421     case SDL_SCANCODE_T: return KEY_T;
 422     case SDL_SCANCODE_U: return KEY_U;
 423     case SDL_SCANCODE_V: return KEY_V;
 424     case SDL_SCANCODE_W: return KEY_W;
 425     case SDL_SCANCODE_X: return KEY_X;
 426     case SDL_SCANCODE_Y: return KEY_Y;
 427     case SDL_SCANCODE_Z: return KEY_Z;
 428     case SDL_SCANCODE_RETURN: return KEY_RETURN;
 429     case SDL_SCANCODE_ESCAPE: return KEY_ESCAPE;
 430     case SDL_SCANCODE_BACKSPACE: return KEY_BACKSPACE;
 431     case SDL_SCANCODE_TAB: return KEY_TAB;
 432     case SDL_SCANCODE_SPACE: return KEY_SPACE;
 433     case SDL_SCANCODE_MINUS: return KEY_MINUS;
 434     case SDL_SCANCODE_EQUALS: return KEY_EQUALS;
 435     case SDL_SCANCODE_LEFTBRACKET: return KEY_LEFTBRACKET;
 436     case SDL_SCANCODE_RIGHTBRACKET: return KEY_RIGHTBRACKET;
 437     case SDL_SCANCODE_BACKSLASH: return KEY_BACKSLASH;
 438     case SDL_SCANCODE_SEMICOLON: return KEY_SEMICOLON;
 439     case SDL_SCANCODE_APOSTROPHE: return KEY_APOSTROPHE;
 440     case SDL_SCANCODE_GRAVE: return KEY_GRAVE;
 441     case SDL_SCANCODE_COMMA: return KEY_COMMA;
 442     case SDL_SCANCODE_PERIOD: return KEY_PERIOD;
 443     case SDL_SCANCODE_SLASH: return KEY_SLASH;
 444     case SDL_SCANCODE_CAPSLOCK: return KEY_CAPSLOCK;
 445     case SDL_SCANCODE_F1: return KEY_F1;
 446     case SDL_SCANCODE_F2: return KEY_F2;
 447     case SDL_SCANCODE_F3: return KEY_F3;
 448     case SDL_SCANCODE_F4: return KEY_F4;
 449     case SDL_SCANCODE_F5: return KEY_F5;
 450     case SDL_SCANCODE_F6: return KEY_F6;
 451     case SDL_SCANCODE_F7: return KEY_F7;
 452     case SDL_SCANCODE_F8: return KEY_F8;
 453     case SDL_SCANCODE_F9: return KEY_F9;
 454     case SDL_SCANCODE_F10: return KEY_F10;
 455     case SDL_SCANCODE_F11: return KEY_F11;
 456     case SDL_SCANCODE_F12: return KEY_F12;
 457     case SDL_SCANCODE_PRINTSCREEN: return KEY_PRINTSCREEN;
 458     case SDL_SCANCODE_SCROLLLOCK: return KEY_SCROLLLOCK;
 459     case SDL_SCANCODE_PAUSE: return KEY_PAUSE;
 460     case SDL_SCANCODE_INSERT: return KEY_INSERT;
 461     case SDL_SCANCODE_HOME: return KEY_HOME;
 462     case SDL_SCANCODE_PAGEUP: return KEY_PAGEUP;
 463     case SDL_SCANCODE_DELETE: return KEY_DELETE;
 464     case SDL_SCANCODE_END: return KEY_END;
 465     case SDL_SCANCODE_PAGEDOWN: return KEY_PAGEDOWN;
 466     case SDL_SCANCODE_RIGHT: return KEY_RIGHT;
 467     case SDL_SCANCODE_LEFT: return KEY_LEFT;
 468     case SDL_SCANCODE_DOWN: return KEY_DOWN;
 469     case SDL_SCANCODE_UP: return KEY_UP;
 470     case SDL_SCANCODE_NUMLOCKCLEAR: return KEY_NUMLOCK;
 471     case SDL_SCANCODE_KP_DIVIDE: return KEY_KP_DIVIDE;
 472     case SDL_SCANCODE_KP_MULTIPLY: return KEY_KP_MULTIPLY;
 473     case SDL_SCANCODE_KP_MINUS: return KEY_KP_MINUS;
 474     case SDL_SCANCODE_KP_PLUS: return KEY_KP_PLUS;
 475     case SDL_SCANCODE_KP_ENTER: return KEY_KP_ENTER;
 476     case SDL_SCANCODE_KP_0: return KEY_KP_0;
 477     case SDL_SCANCODE_KP_1: return KEY_KP_1;
 478     case SDL_SCANCODE_KP_2: return KEY_KP_2;
 479     case SDL_SCANCODE_KP_3: return KEY_KP_3;
 480     case SDL_SCANCODE_KP_4: return KEY_KP_4;
 481     case SDL_SCANCODE_KP_5: return KEY_KP_5;
 482     case SDL_SCANCODE_KP_6: return KEY_KP_6;
 483     case SDL_SCANCODE_KP_7: return KEY_KP_7;
 484     case SDL_SCANCODE_KP_8: return KEY_KP_8;
 485     case SDL_SCANCODE_KP_9: return KEY_KP_9;
 486     case SDL_SCANCODE_KP_PERIOD: return KEY_KP_PERIOD;
 487     case SDL_SCANCODE_SYSREQ: return KEY_SYSREQ;
 488     case SDL_SCANCODE_LCTRL: return KEY_LCTRL;
 489     case SDL_SCANCODE_LSHIFT: return KEY_LSHIFT;
 490     case SDL_SCANCODE_LALT: return KEY_LALT;
 491     case SDL_SCANCODE_LGUI: return KEY_LSUPER;
 492     case SDL_SCANCODE_RCTRL: return KEY_RCTRL;
 493     case SDL_SCANCODE_RSHIFT: return KEY_RSHIFT;
 494     case SDL_SCANCODE_RALT: return KEY_RALT;
 495     case SDL_SCANCODE_RGUI: return KEY_RSUPER;
 496     default: return KEY_UNKNOWN;
 497   }
 498 }
 499
 500 static void window_event_handler (SDL_WindowEvent *ev) {
 501   switch (ev->event) {
 502     case SDL_WINDOWEVENT_RESIZED:
 503       R_set_videomode(ev->data1, ev->data2, Y_get_fullscreen());
 504       break;
 505     case SDL_WINDOWEVENT_CLOSE:
 506       ERR_quit();
 507       break;
 508   }
 509 }
 510
 511 static int utf8_to_wchar (char *x) {
 512   int i = 0;
 513   byte *s = (byte*)x;
 514   if (s[0] < 0x80) {
 515     return s[0];
 516   } else if (s[0] < 0xE0) {
 517     if (s[0] - 192 >= 0 && s[1] >= 0x80 && s[1] < 0xE0) {
 518       i = (s[0] - 192) * 64 + s[1] - 128;
 519     }
 520   } else if (s[0] < 0xF0) {
 521     if (s[1] >= 0x80 && s[1] < 0xE0 && s[2] >= 0x80 && s[2] < 0xE0) {
 522       i = ((s[0] - 224) * 64 + s[1] - 128) * 64 + s[2] - 128;
 523     }
 524   }
 525   return i;
 526 }
 527
 528 static void poll_events (void) {
 529   int key, down, uch, ch;
 530   SDL_Event ev;
 531   while (SDL_PollEvent(&ev)) {
 532     switch (ev.type) {
 533       case SDL_QUIT:
 534         ERR_quit();
 535         break;
 536       case SDL_WINDOWEVENT:
 537         if (ev.window.windowID == SDL_GetWindowID(window)) {
 538           window_event_handler(&ev.window);
 539         }
 540         break;
 541       case SDL_KEYDOWN:
 542       case SDL_KEYUP:
 543         down = ev.type == SDL_KEYDOWN;
 544         key = sdl_to_key(ev.key.keysym.scancode);
 545         I_press(key, down);
 546         GM_key(key, down);
 547         break;
 548       case SDL_TEXTINPUT:
 549         uch = utf8_to_wchar(ev.text.text);
 550         ch = cp866_utoc(uch);
 551         if (ch >= 0) {
 552           GM_input(ch);
 553         }
 554         break;
 555     }
 556   }
 557 }
 558
 559 static void step (void) {
 560   poll_events();
 561   MUS_update();
 562   Uint32 t = SDL_GetTicks();
 563   if (t - ticks > DELAY) {
 564     ticks = t;
 565     G_act();
 566   }
 567   R_draw();
 568 }
 569
 570 int main (int argc, char **argv) {
 571   char *pw;
 572   CFG_args(argc, argv);
 573   logo("system: initialize SDL2\n");
 574   if (SDL_Init(SDL_INIT_TIMER | SDL_INIT_VIDEO | SDL_INIT_EVENTS) == -1) {
 575     logo("system: failed to init SDL2: %s\n", SDL_GetError());
 576     return 1;
 577   }
 578   // Player 1 defaults
 579   pl1.ku = KEY_KP_8;
 580   pl1.kd = KEY_KP_5;
 581   pl1.kl = KEY_KP_4;
 582   pl1.kr = KEY_KP_6;
 583   pl1.kf = KEY_PAGEDOWN;
 584   pl1.kj = KEY_DELETE;
 585   pl1.kwl = KEY_HOME;
 586   pl1.kwr = KEY_END;
 587   pl1.kp = KEY_KP_8;
 588   // Player 2 defaults
 589   pl2.ku = KEY_E;
 590   pl2.kd = KEY_D;
 591   pl2.kl = KEY_S;
 592   pl2.kr = KEY_F;
 593   pl2.kf = KEY_A;
 594   pl2.kj = KEY_Q;
 595   pl2.kwl = KEY_1;
 596   pl2.kwr = KEY_2;
 597   pl2.kp = KEY_E;
 598   srand(SDL_GetTicks());
 599   F_startup();
 600   CFG_load();
 601 #ifndef WIN32
 602   pw = "/usr/share/doom2d-rembo/doom2d.wad";
 603 #else
 604   pw = "doom2d.wad";
 605 #endif
 606   if (fexists(pw)) {
 607     F_addwad(pw);
 608   } else {
 609     F_addwad("doom2d.wad");
 610   }
 611   F_initwads();
 612   M_startup();
 613   F_allocres();
 614   S_init();
 615   MUS_init();
 616   R_init();
 617   G_init();
 618   ticks = SDL_GetTicks();
 619 #ifdef __EMSCRIPTEN__
 620   emscripten_set_main_loop(step, 0, 1);
 621 #else
 622   while (!quit) {
 623     step();
 624   }
 625 #endif
 626   CFG_save();
 627   R_done();
 628   MUS_done();
 629   S_done();
 630   M_shutdown();
 631   SDL_Quit();
 632   return 0;
 633 }