sys_win.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // sys_win.c -- Win32 system interface code
  21
  22 #include "quakedef.h"
  23 #include <windows.h>
  24 #include <dsound.h>
  25 #include "errno.h"
  26 #include "resource.h"
  27 #include "conproc.h"
  28 #include "direct.h"
  29
  30 extern void S_BlockSound (void);
  31
  32 cvar_t sys_usetimegettime = {CVAR_SAVE, "sys_usetimegettime", "1"};
  33
  34 // # of seconds to wait on Sys_Error running dedicated before exiting
  35 #define CONSOLE_ERROR_TIMEOUT   60.0
  36 // sleep time on pause or minimization
  37 #define PAUSE_SLEEP             50
  38 // sleep time when not focus
  39 #define NOT_FOCUS_SLEEP 20
  40
  41 static qboolean         sc_return_on_enter = false;
  42 HANDLE                          hinput, houtput;
  43
  44 static HANDLE   tevent;
  45 static HANDLE   hFile;
  46 static HANDLE   heventParent;
  47 static HANDLE   heventChild;
  48
  49
  50 /*
  51 ===============================================================================
  52
  53 SYSTEM IO
  54
  55 ===============================================================================
  56 */
  57
  58 void SleepUntilInput (int time);
  59
  60 void Sys_Error (const char *error, ...)
  61 {
  62         va_list         argptr;
  63         char            text[1024];
  64         static int      in_sys_error0 = 0;
  65         static int      in_sys_error1 = 0;
  66         static int      in_sys_error2 = 0;
  67
  68         va_start (argptr, error);
  69         vsnprintf (text, sizeof (text), error, argptr);
  70         va_end (argptr);
  71
  72         // close video so the message box is visible, unless we already tried that
  73         if (!in_sys_error0 && cls.state != ca_dedicated)
  74         {
  75                 in_sys_error0 = 1;
  76                 VID_Shutdown();
  77         }
  78         MessageBox(NULL, text, "Quake Error", MB_OK | MB_SETFOREGROUND | MB_ICONSTOP);
  79
  80         if (!in_sys_error1)
  81         {
  82                 in_sys_error1 = 1;
  83                 Host_Shutdown ();
  84         }
  85
  86 // shut down QHOST hooks if necessary
  87         if (!in_sys_error2)
  88         {
  89                 in_sys_error2 = 1;
  90                 DeinitConProc ();
  91         }
  92
  93         exit (1);
  94 }
  95
  96 void Sys_Shutdown (void)
  97 {
  98         if (tevent)
  99                 CloseHandle (tevent);
 100
 101         if (cls.state == ca_dedicated)
 102                 FreeConsole ();
 103
 104 // shut down QHOST hooks if necessary
 105         DeinitConProc ();
 106 }
 107
 108 void Sys_PrintToTerminal(const char *text)
 109 {
 110         DWORD dummy;
 111         extern HANDLE houtput;
 112         if (cls.state == ca_dedicated)
 113                 WriteFile(houtput, text, strlen (text), &dummy, NULL);
 114 }
 115
 116 /*
 117 ================
 118 Sys_DoubleTime
 119 ================
 120 */
 121 double Sys_DoubleTime (void)
 122 {
 123         static int first = true;
 124         static double oldtime = 0.0, curtime = 0.0;
 125         double newtime;
 126         // LordHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
 127         if (sys_usetimegettime.integer)
 128         {
 129                 static int firsttimegettime = true;
 130                 // timeGetTime
 131                 // platform:
 132                 // Windows 95/98/ME/NT/2000/XP
 133                 // features:
 134                 // reasonable accuracy (millisecond)
 135                 // issues:
 136                 // wraps around every 47 days or so (but this is non-fatal to us, odd times are rejected, only causes a one frame stutter)
 137
 138                 // make sure the timer is high precision, otherwise different versions of windows have varying accuracy
 139                 if (firsttimegettime)
 140                 {
 141                         timeBeginPeriod (1);
 142                         firsttimegettime = false;
 143                 }
 144
 145                 newtime = (double) timeGetTime () / 1000.0;
 146         }
 147         else
 148         {
 149                 // QueryPerformanceCounter
 150                 // platform:
 151                 // Windows 95/98/ME/NT/2000/XP
 152                 // features:
 153                 // very accurate (CPU cycles)
 154                 // known issues:
 155                 // does not necessarily match realtime too well (tends to get faster and faster in win98)
 156                 // wraps around occasionally on some platforms (depends on CPU speed and probably other unknown factors)
 157                 double timescale;
 158                 LARGE_INTEGER PerformanceFreq;
 159                 LARGE_INTEGER PerformanceCount;
 160
 161                 if (!QueryPerformanceFrequency (&PerformanceFreq))
 162                         Sys_Error ("No hardware timer available");
 163                 QueryPerformanceCounter (&PerformanceCount);
 164
 165                 #ifdef __BORLANDC__
 166                 timescale = 1.0 / ((double) PerformanceFreq.u.LowPart + (double) PerformanceFreq.u.HighPart * 65536.0 * 65536.0);
 167                 newtime = ((double) PerformanceCount.u.LowPart + (double) PerformanceCount.u.HighPart * 65536.0 * 65536.0) * timescale;
 168                 #else
 169                 timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
 170                 newtime = ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale;
 171                 #endif
 172         }
 173
 174         if (first)
 175         {
 176                 first = false;
 177                 oldtime = newtime;
 178         }
 179
 180         if (newtime < oldtime)
 181         {
 182                 // warn if it's significant
 183                 if (newtime - oldtime < -0.01)
 184                         Con_Printf("Sys_DoubleTime: time stepped backwards (went from %f to %f, difference %f)\n", oldtime, newtime, newtime - oldtime);
 185         }
 186         else
 187                 curtime += newtime - oldtime;
 188         oldtime = newtime;
 189
 190         return curtime;
 191 }
 192
 193
 194 char *Sys_ConsoleInput (void)
 195 {
 196         static char text[256];
 197         static int len;
 198         INPUT_RECORD recs[1024];
 199         int ch;
 200         DWORD numread, numevents, dummy;
 201
 202         if (cls.state != ca_dedicated)
 203                 return NULL;
 204
 205
 206         for ( ;; )
 207         {
 208                 if (!GetNumberOfConsoleInputEvents (hinput, &numevents))
 209                         Sys_Error ("Error getting # of console events");
 210
 211                 if (numevents <= 0)
 212                         break;
 213
 214                 if (!ReadConsoleInput(hinput, recs, 1, &numread))
 215                         Sys_Error ("Error reading console input");
 216
 217                 if (numread != 1)
 218                         Sys_Error ("Couldn't read console input");
 219
 220                 if (recs[0].EventType == KEY_EVENT)
 221                 {
 222                         if (!recs[0].Event.KeyEvent.bKeyDown)
 223                         {
 224                                 ch = recs[0].Event.KeyEvent.uChar.AsciiChar;
 225
 226                                 switch (ch)
 227                                 {
 228                                         case '\r':
 229                                                 WriteFile(houtput, "\r\n", 2, &dummy, NULL);
 230
 231                                                 if (len)
 232                                                 {
 233                                                         text[len] = 0;
 234                                                         len = 0;
 235                                                         return text;
 236                                                 }
 237                                                 else if (sc_return_on_enter)
 238                                                 {
 239                                                 // special case to allow exiting from the error handler on Enter
 240                                                         text[0] = '\r';
 241                                                         len = 0;
 242                                                         return text;
 243                                                 }
 244
 245                                                 break;
 246
 247                                         case '\b':
 248                                                 WriteFile(houtput, "\b \b", 3, &dummy, NULL);
 249                                                 if (len)
 250                                                 {
 251                                                         len--;
 252                                                 }
 253                                                 break;
 254
 255                                         default:
 256                                                 if (ch >= ' ')
 257                                                 {
 258                                                         WriteFile(houtput, &ch, 1, &dummy, NULL);
 259                                                         text[len] = ch;
 260                                                         len = (len + 1) & 0xff;
 261                                                 }
 262
 263                                                 break;
 264
 265                                 }
 266                         }
 267                 }
 268         }
 269
 270         return NULL;
 271 }
 272
 273 void Sys_Sleep(int milliseconds)
 274 {
 275         if (milliseconds < 1)
 276                 milliseconds = 1;
 277         Sleep(milliseconds);
 278 }
 279
 280 /*
 281 ==============================================================================
 282
 283 WINDOWS CRAP
 284
 285 ==============================================================================
 286 */
 287
 288
 289 void SleepUntilInput (int time)
 290 {
 291         MsgWaitForMultipleObjects(1, &tevent, false, time, QS_ALLINPUT);
 292 }
 293
 294
 295 /*
 296 ==================
 297 WinMain
 298 ==================
 299 */
 300 HINSTANCE       global_hInstance;
 301 const char      *argv[MAX_NUM_ARGVS];
 302 char            program_name[MAX_OSPATH];
 303
 304 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 305 {
 306         double frameoldtime, framenewtime;
 307         MEMORYSTATUS lpBuffer;
 308         int t;
 309
 310         /* previous instances do not exist in Win32 */
 311         if (hPrevInstance)
 312                 return 0;
 313
 314         global_hInstance = hInstance;
 315
 316         lpBuffer.dwLength = sizeof(MEMORYSTATUS);
 317         GlobalMemoryStatus (&lpBuffer);
 318
 319         com_argc = 1;
 320         program_name[sizeof(program_name)-1] = 0;
 321         GetModuleFileNameA(NULL, program_name, sizeof(program_name) - 1);
 322         argv[0] = program_name;
 323
 324         // FIXME: this tokenizer is rather redundent, call a more general one
 325         while (*lpCmdLine && (com_argc < MAX_NUM_ARGVS))
 326         {
 327                 while (*lpCmdLine && *lpCmdLine <= 32)
 328                         lpCmdLine++;
 329
 330                 if (*lpCmdLine)
 331                 {
 332                         if (*lpCmdLine == '\"')
 333                         {
 334                                 // quoted string
 335                                 argv[com_argc] = lpCmdLine;
 336                                 com_argc++;
 337
 338                                 while (*lpCmdLine && (*lpCmdLine != '\"'))
 339                                         lpCmdLine++;
 340
 341                                 if (*lpCmdLine)
 342                                 {
 343                                         *lpCmdLine = 0;
 344                                         lpCmdLine++;
 345                                 }
 346
 347                                 if (*lpCmdLine == '\"')
 348                                         lpCmdLine++;
 349                         }
 350                         else
 351                         {
 352                                 // unquoted word
 353                                 argv[com_argc] = lpCmdLine;
 354                                 com_argc++;
 355
 356                                 while (*lpCmdLine && *lpCmdLine > 32)
 357                                         lpCmdLine++;
 358
 359                                 if (*lpCmdLine)
 360                                 {
 361                                         *lpCmdLine = 0;
 362                                         lpCmdLine++;
 363                                 }
 364                         }
 365                 }
 366         }
 367         com_argv = argv;
 368
 369         Sys_Shared_EarlyInit();
 370
 371         Cvar_RegisterVariable(&sys_usetimegettime);
 372
 373         tevent = CreateEvent(NULL, false, false, NULL);
 374
 375         if (!tevent)
 376                 Sys_Error ("Couldn't create event");
 377
 378         // LordHavoc: can't check cls.state because it hasn't been initialized yet
 379         // if (cls.state == ca_dedicated)
 380         if (COM_CheckParm("-dedicated"))
 381         {
 382                 if (!AllocConsole ())
 383                         Sys_Error ("Couldn't create dedicated server console");
 384
 385                 hinput = GetStdHandle (STD_INPUT_HANDLE);
 386                 houtput = GetStdHandle (STD_OUTPUT_HANDLE);
 387
 388         // give QHOST a chance to hook into the console
 389                 if ((t = COM_CheckParm ("-HFILE")) > 0)
 390                 {
 391                         if (t < com_argc)
 392                                 hFile = (HANDLE)atoi (com_argv[t+1]);
 393                 }
 394
 395                 if ((t = COM_CheckParm ("-HPARENT")) > 0)
 396                 {
 397                         if (t < com_argc)
 398                                 heventParent = (HANDLE)atoi (com_argv[t+1]);
 399                 }
 400
 401                 if ((t = COM_CheckParm ("-HCHILD")) > 0)
 402                 {
 403                         if (t < com_argc)
 404                                 heventChild = (HANDLE)atoi (com_argv[t+1]);
 405                 }
 406
 407                 InitConProc (hFile, heventParent, heventChild);
 408         }
 409
 410 // because sound is off until we become active
 411         S_BlockSound ();
 412
 413         Host_Init ();
 414
 415         Sys_Shared_LateInit();
 416
 417         frameoldtime = Sys_DoubleTime ();
 418
 419         /* main window message loop */
 420         while (1)
 421         {
 422                 if (cls.state != ca_dedicated)
 423                 {
 424                 // yield the CPU for a little while when paused, minimized, or not the focus
 425                         if ((cl.paused && !vid_activewindow) || vid_hidden)
 426                         {
 427                                 SleepUntilInput (PAUSE_SLEEP);
 428                                 scr_skipupdate = 1;             // no point in bothering to draw
 429                         }
 430                         else if (!vid_activewindow)
 431                                 SleepUntilInput (NOT_FOCUS_SLEEP);
 432                 }
 433
 434                 framenewtime = Sys_DoubleTime ();
 435                 Host_Frame (framenewtime - frameoldtime);
 436                 frameoldtime = framenewtime;
 437         }
 438
 439         /* return success of application */
 440         return true;
 441 }
 442