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 "my.h" // fexists
  27 #include "player.h" // pl1 pl2
  28 #include "menu.h" // G_keyf
  29 #include "error.h" // logo
  30 #include "monster.h" // nomon
  31
  32 #include "files.h" // F_startup F_addwad F_initwads F_allocres
  33 #include "config.h" // CFG_args CFG_load CFG_save
  34 #include "args.h" // ARG_parse
  35 #include "memory.h" // M_startup
  36 #include "game.h" // G_init G_act
  37 #include "sound.h" // S_init S_done
  38 #include "music.h" // S_initmusic S_updatemusic S_donemusic
  39 #include "render.h" // R_init R_draw R_done
  40
  41 static int ticks = 0;
  42 static int quit = 0;
  43 static videomode_size_t wlist[3] = {
  44  { 320, 200, 0 },
  45  { 640, 400, 0 },
  46  { 800, 600, 0 },
  47 };
  48 static videomode_t vlist = {
  49   3,
  50   wlist
  51 };
  52
  53 static byte *buf = NULL;
  54 static int buf_w = 0;
  55 static int buf_h = 0;
  56 static struct rgb_pal {
  57   byte b, g, r, a;
  58 } rgbpal[256];
  59
  60 static const cfg_t arg[] = {
  61   {"file", NULL, Y_FILES},
  62   {"cheat", &cheat, Y_SW_ON},
  63 //  {"vga", &shot_vga, Y_SW_ON},
  64 //  {"musvol", &mus_vol, Y_WORD},
  65   {"mon", &nomon, Y_SW_OFF},
  66   {"warp", &_warp, Y_BYTE},
  67 //  {"config", NULL, cfg_file, Y_STRING},
  68   {NULL, NULL, 0} // end
  69 };
  70
  71 static const cfg_t cfg[] = {
  72 //  {"screenshot", &shot_vga, Y_SW_ON},
  73 //  {"music_volume", &mus_vol, Y_WORD},
  74 //  {"music_random", &music_random, Y_SW_ON},
  75 //  {"music_time", &music_time, Y_DWORD},
  76 //  {"music_fade", &music_fade, Y_DWORD},
  77   {"pl1_left", &pl1.kl, Y_KEY},
  78   {"pl1_right",&pl1.kr, Y_KEY},
  79   {"pl1_up", &pl1.ku, Y_KEY},
  80   {"pl1_down", &pl1.kd, Y_KEY},
  81   {"pl1_jump", &pl1.kj, Y_KEY},
  82   {"pl1_fire", &pl1.kf, Y_KEY},
  83   {"pl1_next", &pl1.kwr, Y_KEY},
  84   {"pl1_prev", &pl1.kwl, Y_KEY},
  85   {"pl1_use", &pl1.kp, Y_KEY},
  86   {"pl2_left", &pl2.kl, Y_KEY},
  87   {"pl2_right", &pl2.kr, Y_KEY},
  88   {"pl2_up", &pl2.ku, Y_KEY},
  89   {"pl2_down", &pl2.kd, Y_KEY},
  90   {"pl2_jump", &pl2.kj, Y_KEY},
  91   {"pl2_fire", &pl2.kf, Y_KEY},
  92   {"pl2_next", &pl2.kwr, Y_KEY},
  93   {"pl2_prev", &pl2.kwl, Y_KEY},
  94   {"pl2_use", &pl2.kp, Y_KEY},
  95   {NULL, NULL, 0} // end
  96 };
  97
  98 static void CFG_args (int argc, char **argv) {
  99   const cfg_t *list[] = { arg, R_args(), S_args(), MUS_args() };
 100   ARG_parse(argc, argv, 4, list);
 101 }
 102
 103 static void CFG_load (void) {
 104   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 105   CFG_read_config("default.cfg", 4, list);
 106   CFG_read_config("doom2d.cfg", 4, list);
 107 }
 108
 109 static void CFG_save (void) {
 110   const cfg_t *list[] = { cfg, R_conf(), S_conf(), MUS_conf() };
 111   CFG_update_config("doom2d.cfg", "doom2d.cfg", 4, list, "generated by doom2d, do not modify");
 112 }
 113
 114 /* --- error.h --- */
 115
 116 void logo (const char *s, ...) {
 117   va_list ap;
 118   va_start(ap, s);
 119   vprintf(s, ap);
 120   va_end(ap);
 121 //  fflush(stdout);
 122 }
 123
 124 void logo_gas (int cur, int all) {
 125   // stub
 126 }
 127
 128 void ERR_failinit (char *s, ...) {
 129   va_list ap;
 130   va_start(ap, s);
 131   vprintf(s, ap);
 132   va_end(ap);
 133   puts("");
 134   while (1) ;
 135 //  exit(1);
 136 }
 137
 138 void ERR_fatal (char *s, ...) {
 139   va_list ap;
 140   R_done();
 141   MUS_done();
 142   S_done();
 143   M_shutdown();
 144   puts("\nCRITICAL ERROR:");
 145   va_start(ap, s);
 146   vprintf(s, ap);
 147   va_end(ap);
 148   puts("");
 149   while (1) ;
 150 //  exit(1);
 151 }
 152
 153 void ERR_quit (void) {
 154   quit = 1;
 155 }
 156
 157 /* --- system.h --- */
 158
 159 static int Y_resize_window (int w, int h, int fullscreen) {
 160   assert(w > 0);
 161   assert(h > 0);
 162   if (buf != NULL) {
 163     return Y_set_videomode_software(w, h, fullscreen);
 164   }
 165   return 0;
 166 }
 167
 168 int Y_set_videomode_opengl (int w, int h, int fullscreen) {
 169   assert(w > 0);
 170   assert(h > 0);
 171   // TODO
 172   return 0;
 173 }
 174
 175 static void SetupWindow (int w, int h, const char *title) {
 176   int flags = KOS32_WIN_FLAG_CAPTION | KOS32_WIN_FLAG_RELATIVE | KOS32_WIN_FLAG_NOFILL;
 177   int skin_h = GetSkinHeight();
 178   CreateWindow(0, 0, w + 5*2, h + 5 + skin_h, KOS32_WIN_STYLE_FIXED, flags, 0x000000, 0x000000, title);
 179 }
 180
 181 int Y_set_videomode_software (int w, int h, int fullscreen) {
 182   assert(w > 0);
 183   assert(h > 0);
 184   int size = w * h;
 185   byte *new_buf = malloc(size);
 186   if (new_buf != NULL) {
 187     Y_unset_videomode();
 188     memset(new_buf, 0, size);
 189     buf = new_buf;
 190     buf_w = w;
 191     buf_h = h;
 192     BeginDraw();
 193     SetupWindow(w, h, "Doom2D (software render)");
 194     EndDraw();
 195   }
 196   return buf != NULL;
 197 }
 198
 199 void Y_get_videomode (int *w, int *h) {
 200   *w = buf_w;
 201   *h = buf_h;
 202 }
 203
 204 int Y_videomode_setted (void) {
 205   return buf != NULL;
 206 }
 207
 208 void Y_unset_videomode (void) {
 209   if (buf != NULL) {
 210     free(buf);
 211     buf = NULL;
 212     buf_w = 0;
 213     buf_h = 0;
 214   }
 215 }
 216
 217 const videomode_t *Y_get_videomode_list_opengl (int fullscreen) {
 218   return &vlist;
 219 }
 220
 221 const videomode_t *Y_get_videomode_list_software (int fullscreen) {
 222   return &vlist;
 223 }
 224
 225 void Y_set_fullscreen (int yes) {
 226   // TODO
 227 }
 228
 229 int Y_get_fullscreen (void) {
 230   // TODO
 231   return 0;
 232 }
 233
 234 void Y_swap_buffers (void) {
 235   // TODO
 236 }
 237
 238 void Y_get_buffer (byte **buf_ref, int *w, int *h, int *pitch) {
 239   assert(buf_ref != NULL);
 240   assert(w != NULL);
 241   assert(h != NULL);
 242   assert(pitch != NULL);
 243   *buf_ref = buf;
 244   *w = buf_w;
 245   *h = buf_h;
 246   *pitch = buf_w;
 247 }
 248
 249 void Y_set_vga_palette (byte *vgapal) {
 250   int i;
 251   byte *p = vgapal;
 252   assert(buf != NULL);
 253   assert(vgapal != NULL);
 254   for (i = 0; i < 256; i++) {
 255     rgbpal[i].r = p[0] * 255 / 63;
 256     rgbpal[i].g = p[1] * 255 / 63;
 257     rgbpal[i].b = p[2] * 255 / 63;
 258     p += 3;
 259   }
 260 }
 261
 262 void Y_repaint_rect (int x, int y, int w, int h) {
 263   Y_repaint();
 264 }
 265
 266 void Y_repaint (void) {
 267   assert(buf != NULL);
 268   BeginDraw();
 269   SetupWindow(buf_w, buf_h, NULL);
 270   PutImageExt(buf, buf_w, buf_h, 0, 0, 8, rgbpal, 0);
 271   EndDraw();
 272 }
 273
 274 void Y_enable_text_input (void) {
 275   SetInputMode(KOS32_INPUT_MODE_ASCII);
 276 }
 277
 278 void Y_disable_text_input (void) {
 279   SetInputMode(KOS32_INPUT_MODE_SCANCODE);
 280 }
 281
 282 /* --- main --- */
 283
 284 static int scancode_to_key (int scancode) {
 285   switch (scancode) {
 286     case KOS32_SC_0: return KEY_0;
 287     case KOS32_SC_1: return KEY_1;
 288     case KOS32_SC_2: return KEY_2;
 289     case KOS32_SC_3: return KEY_3;
 290     case KOS32_SC_4: return KEY_4;
 291     case KOS32_SC_5: return KEY_5;
 292     case KOS32_SC_6: return KEY_6;
 293     case KOS32_SC_7: return KEY_7;
 294     case KOS32_SC_8: return KEY_8;
 295     case KOS32_SC_9: return KEY_9;
 296     case KOS32_SC_A: return KEY_A;
 297     case KOS32_SC_B: return KEY_B;
 298     case KOS32_SC_C: return KEY_C;
 299     case KOS32_SC_D: return KEY_D;
 300     case KOS32_SC_E: return KEY_E;
 301     case KOS32_SC_F: return KEY_F;
 302     case KOS32_SC_G: return KEY_G;
 303     case KOS32_SC_H: return KEY_H;
 304     case KOS32_SC_I: return KEY_I;
 305     case KOS32_SC_J: return KEY_J;
 306     case KOS32_SC_K: return KEY_K;
 307     case KOS32_SC_L: return KEY_L;
 308     case KOS32_SC_M: return KEY_M;
 309     case KOS32_SC_N: return KEY_N;
 310     case KOS32_SC_O: return KEY_O;
 311     case KOS32_SC_P: return KEY_P;
 312     case KOS32_SC_Q: return KEY_Q;
 313     case KOS32_SC_R: return KEY_R;
 314     case KOS32_SC_S: return KEY_S;
 315     case KOS32_SC_T: return KEY_T;
 316     case KOS32_SC_U: return KEY_U;
 317     case KOS32_SC_V: return KEY_V;
 318     case KOS32_SC_W: return KEY_W;
 319     case KOS32_SC_X: return KEY_X;
 320     case KOS32_SC_Y: return KEY_Y;
 321     case KOS32_SC_Z: return KEY_Z;
 322     case KOS32_SC_RETURN: return KEY_RETURN;
 323     case KOS32_SC_ESCAPE: return KEY_ESCAPE;
 324     case KOS32_SC_BACKSPACE: return KEY_BACKSPACE;
 325     case KOS32_SC_TAB: return KEY_TAB;
 326     case KOS32_SC_SPACE: return KEY_SPACE;
 327     case KOS32_SC_MINUS: return KEY_MINUS;
 328     case KOS32_SC_EQUALS: return KEY_EQUALS;
 329     case KOS32_SC_LEFTBRACKET: return KEY_LEFTBRACKET;
 330     case KOS32_SC_RIGHTBRACKET: return KEY_RIGHTBRACKET;
 331     case KOS32_SC_BACKSLASH: return KEY_BACKSLASH;
 332     case KOS32_SC_SEMICOLON: return KEY_SEMICOLON;
 333     case KOS32_SC_APOSTROPHE: return KEY_APOSTROPHE;
 334     case KOS32_SC_GRAVE: return KEY_GRAVE;
 335     case KOS32_SC_COMMA: return KEY_COMMA;
 336     case KOS32_SC_PERIOD: return KEY_PERIOD;
 337     case KOS32_SC_SLASH: return KEY_SLASH;
 338     case KOS32_SC_CAPSLOCK: return KEY_CAPSLOCK;
 339     case KOS32_SC_F1: return KEY_F1;
 340     case KOS32_SC_F2: return KEY_F2;
 341     case KOS32_SC_F3: return KEY_F3;
 342     case KOS32_SC_F4: return KEY_F4;
 343     case KOS32_SC_F5: return KEY_F5;
 344     case KOS32_SC_F6: return KEY_F6;
 345     case KOS32_SC_F7: return KEY_F7;
 346     case KOS32_SC_F8: return KEY_F8;
 347     case KOS32_SC_F9: return KEY_F9;
 348     case KOS32_SC_F10: return KEY_F10;
 349     case KOS32_SC_F11: return KEY_F11;
 350     case KOS32_SC_F12: return KEY_F12;
 351     case KOS32_SC_SCROLLLOCK: return KEY_SCROLLLOCK;
 352     case KOS32_SC_NUMLOCK: return KEY_NUMLOCK;
 353     case KOS32_SC_KP_MULTIPLY: return KEY_KP_MULTIPLY;
 354     case KOS32_SC_KP_MINUS: return KEY_KP_MINUS;
 355     case KOS32_SC_KP_PLUS: return KEY_KP_PLUS;
 356     case KOS32_SC_KP_0: return KEY_KP_0;
 357     case KOS32_SC_KP_1: return KEY_KP_1;
 358     case KOS32_SC_KP_2: return KEY_KP_2;
 359     case KOS32_SC_KP_3: return KEY_KP_3;
 360     case KOS32_SC_KP_4: return KEY_KP_4;
 361     case KOS32_SC_KP_5: return KEY_KP_5;
 362     case KOS32_SC_KP_6: return KEY_KP_6;
 363     case KOS32_SC_KP_7: return KEY_KP_7;
 364     case KOS32_SC_KP_8: return KEY_KP_8;
 365     case KOS32_SC_KP_9: return KEY_KP_9;
 366     case KOS32_SC_KP_PERIOD: return KEY_KP_PERIOD;
 367     case KOS32_SC_LCTRL: return KEY_LCTRL;
 368     case KOS32_SC_LSHIFT: return KEY_LSHIFT;
 369     case KOS32_SC_LALT: return KEY_LALT;
 370     default: return KEY_UNKNOWN;
 371   }
 372 }
 373
 374 static int ext_scancode_to_key (int scancode) {
 375   switch (scancode) {
 376     case KOS32_SC_INSERT: return KEY_INSERT;
 377     case KOS32_SC_HOME: return KEY_HOME;
 378     case KOS32_SC_PAGEUP: return KEY_PAGEUP;
 379     case KOS32_SC_DELETE: return KEY_DELETE;
 380     case KOS32_SC_END: return KEY_END;
 381     case KOS32_SC_PAGEDOWN: return KEY_PAGEDOWN;
 382     case KOS32_SC_RIGHT: return KEY_RIGHT;
 383     case KOS32_SC_LEFT: return KEY_LEFT;
 384     case KOS32_SC_DOWN: return KEY_DOWN;
 385     case KOS32_SC_UP: return KEY_UP;
 386     case KOS32_SC_KP_DIVIDE: return KEY_KP_DIVIDE;
 387     case KOS32_SC_KP_ENTER: return KEY_KP_ENTER;
 388     case KOS32_SC_LSUPER: return KEY_LSUPER;
 389     case KOS32_SC_RCTRL: return KEY_RCTRL;
 390     case KOS32_SC_RSHIFT: return KEY_RSHIFT;
 391     case KOS32_SC_RALT: return KEY_RALT;
 392     case KOS32_SC_RSUPER: return KEY_RSUPER;
 393     default: return KEY_UNKNOWN;
 394   }
 395 }
 396
 397 static void handle_scancode (int code) {
 398   static enum {
 399     ST_std, ST_ext,
 400     ST_print_down_1, ST_print_down_2,
 401     ST_print_up_1, ST_print_up_2,
 402     ST_pause_1, ST_pause_2, ST_pause_3, ST_pause_4, ST_pause_5,
 403     ST_ok
 404   } state = ST_std;
 405   int k, down;
 406   // logo("scancode >> 0x%x\n", code);
 407   switch (state) {
 408     case ST_std:
 409       if (code == KOS32_SC_EXTENDED) {
 410         state = ST_ext;
 411       } else if (code == KOS32_SC_EXTENDED_PAUSE) {
 412         state = ST_pause_1;
 413       } else {
 414         state = ST_ok;
 415         k = scancode_to_key(code & 0x7f);
 416         down = !((code >> 7) & 1);
 417       }
 418       break;
 419     case ST_ext:
 420       if (code == 0x2A) {
 421         state = ST_print_down_1;
 422       } else if (code == 0xB7) {
 423         state = ST_print_up_1;
 424       } else {
 425         state = ST_ok;
 426         k = ext_scancode_to_key(code & 0x7f);
 427         down = !((code >> 7) & 1);
 428       }
 429       break;
 430     case ST_print_down_1:
 431       assert(code == 0xE0);
 432       state = ST_print_down_2;
 433       break;
 434     case ST_print_down_2:
 435       assert(code == 0x37);
 436       state = ST_ok;
 437       k = KEY_PRINTSCREEN;
 438       down = 1;
 439       break;
 440     case ST_print_up_1:
 441       assert(code == 0xE0);
 442       state = ST_print_up_2;
 443       break;
 444     case ST_print_up_2:
 445       assert(code == 0xAA);
 446       state = ST_ok;
 447       k = KEY_PRINTSCREEN;
 448       down = 0;
 449       break;
 450     case ST_pause_1:
 451       assert(code == 0x1D);
 452       state = ST_pause_2;
 453       break;
 454     case ST_pause_2:
 455       assert(code == 0x45);
 456       state = ST_pause_3;
 457       break;
 458     case ST_pause_3:
 459       assert(code == 0xE1);
 460       state = ST_pause_4;
 461       break;
 462     case ST_pause_4:
 463       assert(code == 0x9D);
 464       state = ST_pause_5;
 465       break;
 466     case ST_pause_5:
 467       assert(code == 0xC5);
 468       state = ST_ok;
 469       k = KEY_PAUSE;
 470       down = 1;
 471       break;
 472     default:
 473       ERR_fatal("handle_scancode: invalid state: %i\n", state);
 474   }
 475   if (state == ST_ok) {
 476     state = ST_std;
 477     // logo("key: %s (%i, %s)\n", I_key_to_string(k), k, down ? "down" : "up");
 478     I_press(k, down);
 479     GM_key(k, down);
 480     if (k = KEY_PAUSE) {
 481       I_press(k, 0);
 482       GM_key(k, 0);
 483     }
 484   }
 485 }
 486
 487 static void poll_events (void) {
 488   int ev, key, button, code, ch, k;
 489   while(!!(ev = CheckEvent())) {
 490     switch (ev) {
 491       case KOS32_EVENT_REDRAW:
 492         return; /* force redraw */
 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 step (void) {
 525   poll_events();
 526   MUS_update();
 527   long t = GetTimeCountPro(); /* ns */
 528   if (t - ticks > DELAY * 1000000) {
 529     ticks = t;
 530     G_act();
 531   }
 532   R_draw();
 533 }
 534
 535 int main (int argc, char **argv) {
 536   char *pw;
 537   CFG_args(argc, argv);
 538   logo("system: initialize engine\n");
 539   SetEventsMask(KOS32_EVENT_FLAG_REDRAW | KOS32_EVENT_FLAG_KEYBOARD | KOS32_EVENT_FLAG_BUTTON);
 540   Y_disable_text_input();
 541   // Player 1 defaults
 542   pl1.ku = KEY_KP_8;
 543   pl1.kd = KEY_KP_5;
 544   pl1.kl = KEY_KP_4;
 545   pl1.kr = KEY_KP_6;
 546   pl1.kf = KEY_PAGEDOWN;
 547   pl1.kj = KEY_DELETE;
 548   pl1.kwl = KEY_HOME;
 549   pl1.kwr = KEY_END;
 550   pl1.kp = KEY_KP_8;
 551   // Player 2 defaults
 552   pl2.ku = KEY_E;
 553   pl2.kd = KEY_D;
 554   pl2.kl = KEY_S;
 555   pl2.kr = KEY_F;
 556   pl2.kf = KEY_A;
 557   pl2.kj = KEY_Q;
 558   pl2.kwl = KEY_1;
 559   pl2.kwr = KEY_2;
 560   pl2.kp = KEY_E;
 561   srand(GetIdleCount());
 562   F_startup();
 563   CFG_load();
 564   pw = "doom2d.wad";
 565   if (fexists(pw)) {
 566     F_addwad(pw);
 567   } else {
 568     F_addwad("doom2d.wad");
 569   }
 570   F_initwads();
 571   M_startup();
 572   F_allocres();
 573   S_init();
 574   MUS_init();
 575   R_init();
 576   G_init();
 577   ticks = GetTimeCountPro();
 578   logo("system: game loop\n");
 579   while (!quit) {
 580     step();
 581   }
 582   logo("system: finalize engine\n");
 583   CFG_save();
 584   R_done();
 585   MUS_done();
 586   S_done();
 587   M_shutdown();
 588   logo("system: halt\n");
 589   return 0;
 590 }