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_Quit (void)
  97 {
  98         Host_Shutdown();
  99
 100         if (tevent)
 101                 CloseHandle (tevent);
 102
 103         if (cls.state == ca_dedicated)
 104                 FreeConsole ();
 105
 106 // shut down QHOST hooks if necessary
 107         DeinitConProc ();
 108
 109         exit (0);
 110 }
 111
 112 void Sys_Print(const char *text)
 113 {
 114         DWORD dummy;
 115         extern HANDLE houtput;
 116         if (cls.state == ca_dedicated)
 117                 WriteFile(houtput, text, strlen (text), &dummy, NULL);
 118 }
 119
 120 /*
 121 ================
 122 Sys_DoubleTime
 123 ================
 124 */
 125 double Sys_DoubleTime (void)
 126 {
 127         static int first = true;
 128         static double oldtime = 0.0, curtime = 0.0;
 129         double newtime;
 130         // LordHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
 131         if (sys_usetimegettime.integer)
 132         {
 133                 static int firsttimegettime = true;
 134                 // timeGetTime
 135                 // platform:
 136                 // Windows 95/98/ME/NT/2000/XP
 137                 // features:
 138                 // reasonable accuracy (millisecond)
 139                 // issues:
 140                 // wraps around every 47 days or so (but this is non-fatal to us, odd times are rejected, only causes a one frame stutter)
 141
 142                 // make sure the timer is high precision, otherwise different versions of windows have varying accuracy
 143                 if (firsttimegettime)
 144                 {
 145                         timeBeginPeriod (1);
 146                         firsttimegettime = false;
 147                 }
 148
 149                 newtime = (double) timeGetTime () / 1000.0;
 150         }
 151         else
 152         {
 153                 // QueryPerformanceCounter
 154                 // platform:
 155                 // Windows 95/98/ME/NT/2000/XP
 156                 // features:
 157                 // very accurate (CPU cycles)
 158                 // known issues:
 159                 // does not necessarily match realtime too well (tends to get faster and faster in win98)
 160                 // wraps around occasionally on some platforms (depends on CPU speed and probably other unknown factors)
 161                 double timescale;
 162                 LARGE_INTEGER PerformanceFreq;
 163                 LARGE_INTEGER PerformanceCount;
 164
 165                 if (!QueryPerformanceFrequency (&PerformanceFreq))
 166                         Sys_Error ("No hardware timer available");
 167                 QueryPerformanceCounter (&PerformanceCount);
 168
 169                 #ifdef __BORLANDC__
 170                 timescale = 1.0 / ((double) PerformanceFreq.u.LowPart + (double) PerformanceFreq.u.HighPart * 65536.0 * 65536.0);
 171                 newtime = ((double) PerformanceCount.u.LowPart + (double) PerformanceCount.u.HighPart * 65536.0 * 65536.0) * timescale;
 172                 #else
 173                 timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
 174                 newtime = ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale;
 175                 #endif
 176         }
 177
 178         if (first)
 179         {
 180                 first = false;
 181                 oldtime = newtime;
 182         }
 183
 184         if (newtime < oldtime)
 185         {
 186                 // warn if it's significant
 187                 if (newtime - oldtime < -0.01)
 188                         Con_Printf("Sys_DoubleTime: time stepped backwards (went from %f to %f, difference %f)\n", oldtime, newtime, newtime - oldtime);
 189         }
 190         else
 191                 curtime += newtime - oldtime;
 192         oldtime = newtime;
 193
 194         return curtime;
 195 }
 196
 197
 198 char *Sys_ConsoleInput (void)
 199 {
 200         static char text[256];
 201         static int len;
 202         INPUT_RECORD recs[1024];
 203         int ch;
 204         DWORD numread, numevents, dummy;
 205
 206         if (cls.state != ca_dedicated)
 207                 return NULL;
 208
 209
 210         for ( ;; )
 211         {
 212                 if (!GetNumberOfConsoleInputEvents (hinput, &numevents))
 213                         Sys_Error ("Error getting # of console events");
 214
 215                 if (numevents <= 0)
 216                         break;
 217
 218                 if (!ReadConsoleInput(hinput, recs, 1, &numread))
 219                         Sys_Error ("Error reading console input");
 220
 221                 if (numread != 1)
 222                         Sys_Error ("Couldn't read console input");
 223
 224                 if (recs[0].EventType == KEY_EVENT)
 225                 {
 226                         if (!recs[0].Event.KeyEvent.bKeyDown)
 227                         {
 228                                 ch = recs[0].Event.KeyEvent.uChar.AsciiChar;
 229
 230                                 switch (ch)
 231                                 {
 232                                         case '\r':
 233                                                 WriteFile(houtput, "\r\n", 2, &dummy, NULL);
 234
 235                                                 if (len)
 236                                                 {
 237                                                         text[len] = 0;
 238                                                         len = 0;
 239                                                         return text;
 240                                                 }
 241                                                 else if (sc_return_on_enter)
 242                                                 {
 243                                                 // special case to allow exiting from the error handler on Enter
 244                                                         text[0] = '\r';
 245                                                         len = 0;
 246                                                         return text;
 247                                                 }
 248
 249                                                 break;
 250
 251                                         case '\b':
 252                                                 WriteFile(houtput, "\b \b", 3, &dummy, NULL);
 253                                                 if (len)
 254                                                 {
 255                                                         len--;
 256                                                 }
 257                                                 break;
 258
 259                                         default:
 260                                                 if (ch >= ' ')
 261                                                 {
 262                                                         WriteFile(houtput, &ch, 1, &dummy, NULL);
 263                                                         text[len] = ch;
 264                                                         len = (len + 1) & 0xff;
 265                                                 }
 266
 267                                                 break;
 268
 269                                 }
 270                         }
 271                 }
 272         }
 273
 274         return NULL;
 275 }
 276
 277 void Sys_Sleep(int milliseconds)
 278 {
 279         if (milliseconds < 1)
 280                 milliseconds = 1;
 281         Sleep(milliseconds);
 282 }
 283
 284
 285 void Sys_SendKeyEvents (void)
 286 {
 287         MSG msg;
 288
 289         while (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
 290         {
 291         // we always update if there are any event, even if we're paused
 292                 scr_skipupdate = 0;
 293
 294                 if (!GetMessage (&msg, NULL, 0, 0))
 295                         Sys_Quit ();
 296
 297                 TranslateMessage (&msg);
 298                 DispatchMessage (&msg);
 299         }
 300 }
 301
 302
 303 /*
 304 ==============================================================================
 305
 306 WINDOWS CRAP
 307
 308 ==============================================================================
 309 */
 310
 311
 312 void SleepUntilInput (int time)
 313 {
 314         MsgWaitForMultipleObjects(1, &tevent, false, time, QS_ALLINPUT);
 315 }
 316
 317
 318 /*
 319 ==================
 320 WinMain
 321 ==================
 322 */
 323 HINSTANCE       global_hInstance;
 324 const char      *argv[MAX_NUM_ARGVS];
 325 char            program_name[MAX_OSPATH];
 326
 327 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 328 {
 329         double frameoldtime, framenewtime;
 330         MEMORYSTATUS lpBuffer;
 331         int t;
 332
 333         /* previous instances do not exist in Win32 */
 334         if (hPrevInstance)
 335                 return 0;
 336
 337         global_hInstance = hInstance;
 338
 339         lpBuffer.dwLength = sizeof(MEMORYSTATUS);
 340         GlobalMemoryStatus (&lpBuffer);
 341
 342         com_argc = 1;
 343         program_name[sizeof(program_name)-1] = 0;
 344         GetModuleFileNameA(NULL, program_name, sizeof(program_name) - 1);
 345         argv[0] = program_name;
 346
 347         while (*lpCmdLine && (com_argc < MAX_NUM_ARGVS))
 348         {
 349                 while (*lpCmdLine && ((*lpCmdLine <= 32) || (*lpCmdLine > 126)))
 350                         lpCmdLine++;
 351
 352                 if (*lpCmdLine)
 353                 {
 354                         argv[com_argc] = lpCmdLine;
 355                         com_argc++;
 356
 357                         while (*lpCmdLine && ((*lpCmdLine > 32) && (*lpCmdLine <= 126)))
 358                                 lpCmdLine++;
 359
 360                         if (*lpCmdLine)
 361                         {
 362                                 *lpCmdLine = 0;
 363                                 lpCmdLine++;
 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