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