src/kos32/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 #include "kos32.h"
  17
  18 #include <stdio.h>
  19 #include <stdarg.h>
  20 #include <stdlib.h> // srand exit
  21 #include <string.h>
  22 #include <assert.h>
  23 #include "system.h"
  24 #include "input.h"
  25
  26 #include "player.h" // pl1 pl2
  27 #include "menu.h" // G_keyf
  28 #include "error.h" // logo
  29 #include "monster.h" // nomon
  30
  31 #include "files.h" // F_startup F_addwad F_initwads F_allocres
  32 #include "config.h" // CFG_args CFG_load CFG_save
  33 #include "args.h" // ARG_parse
  34 #include "memory.h" // M_startup
  35 #include "game.h" // G_init G_act
  36 #include "sound.h" // S_init S_done
  37 #include "music.h" // S_initmusic S_updatemusic S_donemusic
  38 #include "render.h" // R_init R_draw R_done
  39
  40 static int quit = 0;
  41 static videomode_size_t wlist[3] = {
  42  { 320, 200, 0 },
  43  { 640, 400, 0 },
  44  { 800, 600, 0 },
  45 };
  46 static videomode_t vlist = {
  47   3,
  48   wlist
  49 };
  50
  51 static byte *buf = NULL;
  52 static int buf_w = 0;
  53 static int buf_h = 0;
  54 static struct rgb_pal {
  55   byte b, g, r, a;
  56 } rgbpal[256];
  57
  58 static const cfg_t arg[] = {
  59   {"file", NULL, Y_FILES},
  60   {"cheat", &cheat, Y_SW_ON},
  61 //  {"vga", &shot_vga, Y_SW_ON},
  62 //  {"musvol", &mus_vol, Y_WORD},
  63   {"mon", &nomon, Y_SW_OFF},
  64   {"warp", &_warp, Y_BYTE},
  65 //  {"config", NULL, cfg_file, Y_STRING},
  66   {NULL, NULL, 0} // end
  67 };
  68
  69 static const cfg_t cfg[] = {
  70 //  {"screenshot", &shot_vga, Y_SW_ON},
  71 //  {"music_volume", &mus_vol, Y_WORD},
  72 //  {"music_random", &music_random, Y_SW_ON},
  73 //  {"music_time", &music_time, Y_DWORD},
  74 //  {"music_fade", &music_fade, Y_DWORD},
  75   {"pl1_left", &pl1.kl, Y_KEY},
  76   {"pl1_right",&pl1.kr, Y_KEY},
  77   {"pl1_up", &pl1.ku, Y_KEY},
  78   {"pl1_down", &pl1.kd, Y_KEY},
  79   {"pl1_jump", &pl1.kj, Y_KEY},
  80   {"pl1_fire", &pl1.kf, Y_KEY},
  81   {"pl1_next", &pl1.kwr, Y_KEY},
  82   {"pl1_prev", &pl1.kwl, Y_KEY},
  83   {"pl1_use", &pl1.kp, Y_KEY},
  84   {"pl2_left", &pl2.kl, Y_KEY},
  85   {"pl2_right", &pl2.kr, Y_KEY},
  86   {"pl2_up", &pl2.ku, Y_KEY},
  87   {"pl2_down", &pl2.kd, Y_KEY},
  88   {"pl2_jump", &pl2.kj, Y_KEY},
  89   {"pl2_fire", &pl2.kf, Y_KEY},
  90   {"pl2_next", &pl2.kwr, Y_KEY},
  91   {"pl2_prev", &pl2.kwl, Y_KEY},
  92   {"pl2_use", &pl2.kp, Y_KEY},
  93   {NULL, NULL, 0} // end
  94 };
  95
  96 static void CFG_args (int argc, char **argv) {
  97   const cfg_t *list[] = { arg, R_args(), S_args(), MUS_args() };
  98   ARG_parse(argc, argv, 4, list);
  99 }
 100
 101 static void CFG_load (void) {
 102   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 103   CFG_read_config("default.cfg", 4, list);
 104   CFG_read_config("doom2d.cfg", 4, list);
 105 }
 106
 107 static void CFG_save (void) {
 108   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 109   CFG_update_config("doom2d.cfg", "doom2d.cfg", 4, list, "generated by doom2d, do not modify");
 110 }
 111
 112 /* --- error.h --- */
 113
 114 void logo (const char *s, ...) {
 115   va_list ap;
 116   va_start(ap, s);
 117   vprintf(s, ap);
 118   va_end(ap);
 119 //  fflush(stdout);
 120 }
 121
 122 void logo_gas (int cur, int all) {
 123   // stub
 124 }
 125
 126 void ERR_failinit (char *s, ...) {
 127   va_list ap;
 128   va_start(ap, s);
 129   vprintf(s, ap);
 130   va_end(ap);
 131   puts("");
 132   while (1) ;
 133 //  exit(1);
 134 }
 135
 136 void ERR_fatal (char *s, ...) {
 137   va_list ap;
 138   R_done();
 139   MUS_done();
 140   S_done();
 141   puts("\nCRITICAL ERROR:");
 142   va_start(ap, s);
 143   vprintf(s, ap);
 144   va_end(ap);
 145   puts("");
 146   while (1) ;
 147 //  exit(1);
 148 }
 149
 150 void ERR_quit (void) {
 151   quit = 1;
 152 }
 153
 154 /* --- system.h --- */
 155
 156 static int Y_resize_window (int w, int h, int fullscreen) {
 157   assert(w > 0);
 158   assert(h > 0);
 159   if (buf != NULL) {
 160     return Y_set_videomode_software(w, h, fullscreen);
 161   }
 162   return 0;
 163 }
 164
 165 int Y_set_videomode_opengl (int w, int h, int fullscreen) {
 166   assert(w > 0);
 167   assert(h > 0);
 168   // TODO
 169   return 0;
 170 }
 171
 172 static void SetupWindow (int w, int h, const char *title) {
 173   int flags = KOS32_WIN_FLAG_CAPTION | KOS32_WIN_FLAG_RELATIVE | KOS32_WIN_FLAG_NOFILL;
 174   int skin_h = GetSkinHeight();
 175   CreateWindow(0, 0, w + 5*2, h + 5 + skin_h, KOS32_WIN_STYLE_FIXED, flags, 0x000000, 0x000000, title);
 176 }
 177
 178 int Y_set_videomode_software (int w, int h, int fullscreen) {
 179   assert(w > 0);
 180   assert(h > 0);
 181   int size = w * h;
 182   byte *new_buf = malloc(size);
 183   if (new_buf != NULL) {
 184     Y_unset_videomode();
 185     memset(new_buf, 0, size);
 186     buf = new_buf;
 187     buf_w = w;
 188     buf_h = h;
 189     BeginDraw();
 190     SetupWindow(w, h, "Doom2D (software render)");
 191     EndDraw();
 192   }
 193   return buf != NULL;
 194 }
 195
 196 void Y_get_videomode (int *w, int *h) {
 197   *w = buf_w;
 198   *h = buf_h;
 199 }
 200
 201 int Y_videomode_setted (void) {
 202   return buf != NULL;
 203 }
 204
 205 void Y_unset_videomode (void) {
 206   if (buf != NULL) {
 207     free(buf);
 208     buf = NULL;
 209     buf_w = 0;
 210     buf_h = 0;
 211   }
 212 }
 213
 214 const videomode_t *Y_get_videomode_list_opengl (int fullscreen) {
 215   return &vlist;
 216 }
 217
 218 const videomode_t *Y_get_videomode_list_software (int fullscreen) {
 219   return &vlist;
 220 }
 221
 222 void Y_set_fullscreen (int yes) {
 223   // TODO
 224 }
 225
 226 int Y_get_fullscreen (void) {
 227   // TODO
 228   return 0;
 229 }
 230
 231 void Y_swap_buffers (void) {
 232   // TODO
 233 }
 234
 235 void Y_get_buffer (byte **buf_ref, int *w, int *h, int *pitch) {
 236   assert(buf_ref != NULL);
 237   assert(w != NULL);
 238   assert(h != NULL);
 239   assert(pitch != NULL);
 240   *buf_ref = buf;
 241   *w = buf_w;
 242   *h = buf_h;
 243   *pitch = buf_w;
 244 }
 245
 246 void Y_set_vga_palette (byte *vgapal) {
 247   int i;
 248   byte *p = vgapal;
 249   assert(buf != NULL);
 250   assert(vgapal != NULL);
 251   for (i = 0; i < 256; i++) {
 252     rgbpal[i].r = p[0] * 255 / 63;
 253     rgbpal[i].g = p[1] * 255 / 63;
 254     rgbpal[i].b = p[2] * 255 / 63;
 255     p += 3;
 256   }
 257 }
 258
 259 void Y_repaint_rect (int x, int y, int w, int h) {
 260   Y_repaint();
 261 }
 262
 263 void Y_repaint (void) {
 264   assert(buf != NULL);
 265   BeginDraw();
 266   SetupWindow(buf_w, buf_h, NULL);
 267   PutImageExt(buf, buf_w, buf_h, 0, 0, 8, rgbpal, 0);
 268   EndDraw();
 269 }
 270
 271 void Y_enable_text_input (void) {
 272   SetInputMode(KOS32_INPUT_MODE_ASCII);
 273 }
 274
 275 void Y_disable_text_input (void) {
 276   SetInputMode(KOS32_INPUT_MODE_SCANCODE);
 277 }
 278
 279 /* --- main --- */
 280
 281 static int scancode_to_key (int scancode) {
 282   switch (scancode) {
 283     case KOS32_SC_0: return KEY_0;
 284     case KOS32_SC_1: return KEY_1;
 285     case KOS32_SC_2: return KEY_2;
 286     case KOS32_SC_3: return KEY_3;
 287     case KOS32_SC_4: return KEY_4;
 288     case KOS32_SC_5: return KEY_5;
 289     case KOS32_SC_6: return KEY_6;
 290     case KOS32_SC_7: return KEY_7;
 291     case KOS32_SC_8: return KEY_8;
 292     case KOS32_SC_9: return KEY_9;
 293     case KOS32_SC_A: return KEY_A;
 294     case KOS32_SC_B: return KEY_B;
 295     case KOS32_SC_C: return KEY_C;
 296     case KOS32_SC_D: return KEY_D;
 297     case KOS32_SC_E: return KEY_E;
 298     case KOS32_SC_F: return KEY_F;
 299     case KOS32_SC_G: return KEY_G;
 300     case KOS32_SC_H: return KEY_H;
 301     case KOS32_SC_I: return KEY_I;
 302     case KOS32_SC_J: return KEY_J;
 303     case KOS32_SC_K: return KEY_K;
 304     case KOS32_SC_L: return KEY_L;
 305     case KOS32_SC_M: return KEY_M;
 306     case KOS32_SC_N: return KEY_N;
 307     case KOS32_SC_O: return KEY_O;
 308     case KOS32_SC_P: return KEY_P;
 309     case KOS32_SC_Q: return KEY_Q;
 310     case KOS32_SC_R: return KEY_R;
 311     case KOS32_SC_S: return KEY_S;
 312     case KOS32_SC_T: return KEY_T;
 313     case KOS32_SC_U: return KEY_U;
 314     case KOS32_SC_V: return KEY_V;
 315     case KOS32_SC_W: return KEY_W;
 316     case KOS32_SC_X: return KEY_X;
 317     case KOS32_SC_Y: return KEY_Y;
 318     case KOS32_SC_Z: return KEY_Z;
 319     case KOS32_SC_RETURN: return KEY_RETURN;
 320     case KOS32_SC_ESCAPE: return KEY_ESCAPE;
 321     case KOS32_SC_BACKSPACE: return KEY_BACKSPACE;
 322     case KOS32_SC_TAB: return KEY_TAB;
 323     case KOS32_SC_SPACE: return KEY_SPACE;
 324     case KOS32_SC_MINUS: return KEY_MINUS;
 325     case KOS32_SC_EQUALS: return KEY_EQUALS;
 326     case KOS32_SC_LEFTBRACKET: return KEY_LEFTBRACKET;
 327     case KOS32_SC_RIGHTBRACKET: return KEY_RIGHTBRACKET;
 328     case KOS32_SC_BACKSLASH: return KEY_BACKSLASH;
 329     case KOS32_SC_SEMICOLON: return KEY_SEMICOLON;
 330     case KOS32_SC_APOSTROPHE: return KEY_APOSTROPHE;
 331     case KOS32_SC_GRAVE: return KEY_GRAVE;
 332     case KOS32_SC_COMMA: return KEY_COMMA;
 333     case KOS32_SC_PERIOD: return KEY_PERIOD;
 334     case KOS32_SC_SLASH: return KEY_SLASH;
 335     case KOS32_SC_CAPSLOCK: return KEY_CAPSLOCK;
 336     case KOS32_SC_F1: return KEY_F1;
 337     case KOS32_SC_F2: return KEY_F2;
 338     case KOS32_SC_F3: return KEY_F3;
 339     case KOS32_SC_F4: return KEY_F4;
 340     case KOS32_SC_F5: return KEY_F5;
 341     case KOS32_SC_F6: return KEY_F6;
 342     case KOS32_SC_F7: return KEY_F7;
 343     case KOS32_SC_F8: return KEY_F8;
 344     case KOS32_SC_F9: return KEY_F9;
 345     case KOS32_SC_F10: return KEY_F10;
 346     case KOS32_SC_F11: return KEY_F11;
 347     case KOS32_SC_F12: return KEY_F12;
 348     case KOS32_SC_SCROLLLOCK: return KEY_SCROLLLOCK;
 349     case KOS32_SC_NUMLOCK: return KEY_NUMLOCK;
 350     case KOS32_SC_KP_MULTIPLY: return KEY_KP_MULTIPLY;
 351     case KOS32_SC_KP_MINUS: return KEY_KP_MINUS;
 352     case KOS32_SC_KP_PLUS: return KEY_KP_PLUS;
 353     case KOS32_SC_KP_0: return KEY_KP_0;
 354     case KOS32_SC_KP_1: return KEY_KP_1;
 355     case KOS32_SC_KP_2: return KEY_KP_2;
 356     case KOS32_SC_KP_3: return KEY_KP_3;
 357     case KOS32_SC_KP_4: return KEY_KP_4;
 358     case KOS32_SC_KP_5: return KEY_KP_5;
 359     case KOS32_SC_KP_6: return KEY_KP_6;
 360     case KOS32_SC_KP_7: return KEY_KP_7;
 361     case KOS32_SC_KP_8: return KEY_KP_8;
 362     case KOS32_SC_KP_9: return KEY_KP_9;
 363     case KOS32_SC_KP_PERIOD: return KEY_KP_PERIOD;
 364     case KOS32_SC_LCTRL: return KEY_LCTRL;
 365     case KOS32_SC_LSHIFT: return KEY_LSHIFT;
 366     case KOS32_SC_LALT: return KEY_LALT;
 367     default: return KEY_UNKNOWN;
 368   }
 369 }
 370
 371 static int ext_scancode_to_key (int scancode) {
 372   switch (scancode) {
 373     case KOS32_SC_INSERT: return KEY_INSERT;
 374     case KOS32_SC_HOME: return KEY_HOME;
 375     case KOS32_SC_PAGEUP: return KEY_PAGEUP;
 376     case KOS32_SC_DELETE: return KEY_DELETE;
 377     case KOS32_SC_END: return KEY_END;
 378     case KOS32_SC_PAGEDOWN: return KEY_PAGEDOWN;
 379     case KOS32_SC_RIGHT: return KEY_RIGHT;
 380     case KOS32_SC_LEFT: return KEY_LEFT;
 381     case KOS32_SC_DOWN: return KEY_DOWN;
 382     case KOS32_SC_UP: return KEY_UP;
 383     case KOS32_SC_KP_DIVIDE: return KEY_KP_DIVIDE;
 384     case KOS32_SC_KP_ENTER: return KEY_KP_ENTER;
 385     case KOS32_SC_LSUPER: return KEY_LSUPER;
 386     case KOS32_SC_RCTRL: return KEY_RCTRL;
 387     case KOS32_SC_RSHIFT: return KEY_RSHIFT;
 388     case KOS32_SC_RALT: return KEY_RALT;
 389     case KOS32_SC_RSUPER: return KEY_RSUPER;
 390     default: return KEY_UNKNOWN;
 391   }
 392 }
 393
 394 static void handle_scancode (int code) {
 395   static enum {
 396     ST_std, ST_ext,
 397     ST_print_down_1, ST_print_down_2,
 398     ST_print_up_1, ST_print_up_2,
 399     ST_pause_1, ST_pause_2, ST_pause_3, ST_pause_4, ST_pause_5,
 400     ST_ok
 401   } state = ST_std;
 402   int k, down;
 403   // logo("scancode >> 0x%x\n", code);
 404   switch (state) {
 405     case ST_std:
 406       if (code == KOS32_SC_EXTENDED) {
 407         state = ST_ext;
 408       } else if (code == KOS32_SC_EXTENDED_PAUSE) {
 409         state = ST_pause_1;
 410       } else {
 411         state = ST_ok;
 412         k = scancode_to_key(code & 0x7f);
 413         down = !((code >> 7) & 1);
 414       }
 415       break;
 416     case ST_ext:
 417       if (code == 0x2A) {
 418         state = ST_print_down_1;
 419       } else if (code == 0xB7) {
 420         state = ST_print_up_1;
 421       } else {
 422         state = ST_ok;
 423         k = ext_scancode_to_key(code & 0x7f);
 424         down = !((code >> 7) & 1);
 425       }
 426       break;
 427     case ST_print_down_1:
 428       assert(code == 0xE0);
 429       state = ST_print_down_2;
 430       break;
 431     case ST_print_down_2:
 432       assert(code == 0x37);
 433       state = ST_ok;
 434       k = KEY_PRINTSCREEN;
 435       down = 1;
 436       break;
 437     case ST_print_up_1:
 438       assert(code == 0xE0);
 439       state = ST_print_up_2;
 440       break;
 441     case ST_print_up_2:
 442       assert(code == 0xAA);
 443       state = ST_ok;
 444       k = KEY_PRINTSCREEN;
 445       down = 0;
 446       break;
 447     case ST_pause_1:
 448       assert(code == 0x1D);
 449       state = ST_pause_2;
 450       break;
 451     case ST_pause_2:
 452       assert(code == 0x45);
 453       state = ST_pause_3;
 454       break;
 455     case ST_pause_3:
 456       assert(code == 0xE1);
 457       state = ST_pause_4;
 458       break;
 459     case ST_pause_4:
 460       assert(code == 0x9D);
 461       state = ST_pause_5;
 462       break;
 463     case ST_pause_5:
 464       assert(code == 0xC5);
 465       state = ST_ok;
 466       k = KEY_PAUSE;
 467       down = 1;
 468       break;
 469     default:
 470       ERR_fatal("handle_scancode: invalid state: %i\n", state);
 471   }
 472   if (state == ST_ok) {
 473     state = ST_std;
 474     // logo("key: %s (%i, %s)\n", I_key_to_string(k), k, down ? "down" : "up");
 475     I_press(k, down);
 476     GM_key(k, down);
 477     if (k = KEY_PAUSE) {
 478       I_press(k, 0);
 479       GM_key(k, 0);
 480     }
 481   }
 482 }
 483
 484 static void poll_events (void) {
 485   int ev, key, button, code, ch, k;
 486   while((ev = CheckEvent()) != KOS32_EVENT_NONE) {
 487     switch (ev) {
 488       case KOS32_EVENT_REDRAW:
 489         if (buf != NULL) {
 490           Y_repaint(); /* redraw window */
 491         }
 492         break;
 493       case KOS32_EVENT_KEYBOARD:
 494         key = GetKey();
 495         if ((key & 0xff) == 0) {
 496           switch (GetInputMode()) {
 497             case KOS32_INPUT_MODE_ASCII:
 498               ch = (key >> 8) & 0xff;
 499               code = (key >> 16) & 0x7f;
 500               k = scancode_to_key(code);
 501               I_press(k, 1);
 502               GM_key(k, 1);
 503               GM_input(ch);
 504               I_press(k, 0);
 505               GM_key(k, 0);
 506               break;
 507             case KOS32_INPUT_MODE_SCANCODE:
 508               code = key >> 8;
 509               handle_scancode(code);
 510               break;
 511           }
 512         }
 513         break;
 514       case KOS32_EVENT_BUTTON:
 515         button = GetButton();
 516         quit = button == 256; /* close button + left click */
 517         break;
 518       default:
 519         ERR_fatal("poll_events: unhandled event: %i\n", ev);
 520     }
 521   }
 522 }
 523
 524 static void game_loop (void) {
 525   static long ticks; /* ns */
 526   ticks = GetTimeCountPro();
 527   while (!quit) {
 528     poll_events();
 529     MUS_update();
 530     long t = GetTimeCountPro(); /* ns */
 531     int n = (t - ticks) / ((DELAY + 1) * 1000000);
 532     ticks = ticks + n * ((DELAY + 1) * 1000000);
 533     if (n > 0) {
 534       while (n) {
 535         G_act();
 536         n -= 1;
 537       }
 538       R_draw();
 539     }
 540     Delay(1);
 541   }
 542 }
 543
 544 int main (int argc, char **argv) {
 545   CFG_args(argc, argv);
 546   logo("system: initialize engine\n");
 547   SetEventsMask(KOS32_EVENT_FLAG_REDRAW | KOS32_EVENT_FLAG_KEYBOARD | KOS32_EVENT_FLAG_BUTTON);
 548   Y_disable_text_input();
 549   // Player 1 defaults
 550   pl1.ku = KEY_KP_8;
 551   pl1.kd = KEY_KP_5;
 552   pl1.kl = KEY_KP_4;
 553   pl1.kr = KEY_KP_6;
 554   pl1.kf = KEY_PAGEDOWN;
 555   pl1.kj = KEY_DELETE;
 556   pl1.kwl = KEY_HOME;
 557   pl1.kwr = KEY_END;
 558   pl1.kp = KEY_KP_8;
 559   // Player 2 defaults
 560   pl2.ku = KEY_E;
 561   pl2.kd = KEY_D;
 562   pl2.kl = KEY_S;
 563   pl2.kr = KEY_F;
 564   pl2.kf = KEY_A;
 565   pl2.kj = KEY_Q;
 566   pl2.kwl = KEY_1;
 567   pl2.kwr = KEY_2;
 568   pl2.kp = KEY_E;
 569   srand(GetIdleCount());
 570   CFG_load();
 571   F_addwad("doom2d.wad");
 572   F_initwads();
 573   S_init();
 574   MUS_init();
 575   R_init();
 576   G_init();
 577   logo("system: game loop\n");
 578   game_loop();
 579   logo("system: finalize engine\n");
 580   CFG_save();
 581   R_done();
 582   MUS_done();
 583   S_done();
 584   logo("system: halt\n");
 585   return 0;
 586 }