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 extern void S_UnblockSound (void);
  32
  33 cvar_t sys_usetimegettime = {CVAR_SAVE, "sys_usetimegettime", "1"};
  34
  35 // # of seconds to wait on Sys_Error running dedicated before exiting
  36 #define CONSOLE_ERROR_TIMEOUT   60.0
  37 // sleep time on pause or minimization
  38 #define PAUSE_SLEEP             50
  39 // sleep time when not focus
  40 #define NOT_FOCUS_SLEEP 20
  41
  42 static qboolean         sc_return_on_enter = false;
  43 HANDLE                          hinput, houtput;
  44
  45 static HANDLE   tevent;
  46 static HANDLE   hFile;
  47 static HANDLE   heventParent;
  48 static HANDLE   heventChild;
  49
  50
  51 /*
  52 ===============================================================================
  53
  54 SYSTEM IO
  55
  56 ===============================================================================
  57 */
  58
  59 void SleepUntilInput (int time);
  60
  61 void Sys_Error (const char *error, ...)
  62 {
  63         va_list         argptr;
  64         char            text[1024];
  65         static int      in_sys_error0 = 0;
  66         static int      in_sys_error1 = 0;
  67         static int      in_sys_error2 = 0;
  68
  69         va_start (argptr, error);
  70         vsnprintf (text, sizeof (text), error, argptr);
  71         va_end (argptr);
  72
  73         // close video so the message box is visible, unless we already tried that
  74         if (!in_sys_error0 && cls.state != ca_dedicated)
  75         {
  76                 in_sys_error0 = 1;
  77                 VID_Shutdown();
  78         }
  79         MessageBox(NULL, text, "Quake Error", MB_OK | MB_SETFOREGROUND | MB_ICONSTOP);
  80
  81         if (!in_sys_error1)
  82         {
  83                 in_sys_error1 = 1;
  84                 Host_Shutdown ();
  85         }
  86
  87 // shut down QHOST hooks if necessary
  88         if (!in_sys_error2)
  89         {
  90                 in_sys_error2 = 1;
  91                 DeinitConProc ();
  92         }
  93
  94         exit (1);
  95 }
  96
  97 void Sys_Quit (void)
  98 {
  99         Host_Shutdown();
 100
 101         if (tevent)
 102                 CloseHandle (tevent);
 103
 104         if (cls.state == ca_dedicated)
 105                 FreeConsole ();
 106
 107 // shut down QHOST hooks if necessary
 108         DeinitConProc ();
 109
 110         exit (0);
 111 }
 112
 113 void Sys_Print(const char *text)
 114 {
 115         DWORD dummy;
 116         extern HANDLE houtput;
 117         if (cls.state == ca_dedicated)
 118                 WriteFile(houtput, text, strlen (text), &dummy, NULL);
 119 }
 120
 121 /*
 122 ================
 123 Sys_DoubleTime
 124 ================
 125 */
 126 double Sys_DoubleTime (void)
 127 {
 128         static int first = true;
 129         static double oldtime = 0.0, curtime = 0.0;
 130         double newtime;
 131         // LordHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
 132         if (sys_usetimegettime.integer)
 133         {
 134                 static int firsttimegettime = true;
 135                 // timeGetTime
 136                 // platform:
 137                 // Windows 95/98/ME/NT/2000/XP
 138                 // features:
 139                 // reasonable accuracy (millisecond)
 140                 // issues:
 141                 // wraps around every 47 days or so (but this is non-fatal to us, odd times are rejected, only causes a one frame stutter)
 142
 143                 // make sure the timer is high precision, otherwise different versions of windows have varying accuracy
 144                 if (firsttimegettime)
 145                 {
 146                         timeBeginPeriod (1);
 147                         firsttimegettime = false;
 148                 }
 149
 150                 newtime = (double) timeGetTime () / 1000.0;
 151         }
 152         else
 153         {
 154                 // QueryPerformanceCounter
 155                 // platform:
 156                 // Windows 95/98/ME/NT/2000/XP
 157                 // features:
 158                 // very accurate (CPU cycles)
 159                 // known issues:
 160                 // does not necessarily match realtime too well (tends to get faster and faster in win98)
 161                 // wraps around occasionally on some platforms (depends on CPU speed and probably other unknown factors)
 162                 double timescale;
 163                 LARGE_INTEGER PerformanceFreq;
 164                 LARGE_INTEGER PerformanceCount;
 165
 166                 if (!QueryPerformanceFrequency (&PerformanceFreq))
 167                         Sys_Error ("No hardware timer available");
 168                 QueryPerformanceCounter (&PerformanceCount);
 169
 170                 #ifdef __BORLANDC__
 171                 timescale = 1.0 / ((double) PerformanceFreq.u.LowPart + (double) PerformanceFreq.u.HighPart * 65536.0 * 65536.0);
 172                 newtime = ((double) PerformanceCount.u.LowPart + (double) PerformanceCount.u.HighPart * 65536.0 * 65536.0) * timescale;
 173                 #else
 174                 timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
 175                 newtime = ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale;
 176                 #endif
 177         }
 178
 179         if (first)
 180         {
 181                 first = false;
 182                 oldtime = newtime;
 183         }
 184
 185         if (newtime < oldtime)
 186         {
 187                 // warn if it's significant
 188                 if (newtime - oldtime < -0.01)
 189                         Con_Printf("Sys_DoubleTime: time stepped backwards (went from %f to %f, difference %f)\n", oldtime, newtime, newtime - oldtime);
 190         }
 191         else
 192                 curtime += newtime - oldtime;
 193         oldtime = newtime;
 194
 195         return curtime;
 196 }
 197
 198
 199 char *Sys_ConsoleInput (void)
 200 {
 201         static char text[256];
 202         static int len;
 203         INPUT_RECORD recs[1024];
 204         int ch;
 205         DWORD numread, numevents, dummy;
 206
 207         if (cls.state != ca_dedicated)
 208                 return NULL;
 209
 210
 211         for ( ;; )
 212         {
 213                 if (!GetNumberOfConsoleInputEvents (hinput, &numevents))
 214                         Sys_Error ("Error getting # of console events");
 215
 216                 if (numevents <= 0)
 217                         break;
 218
 219                 if (!ReadConsoleInput(hinput, recs, 1, &numread))
 220                         Sys_Error ("Error reading console input");
 221
 222                 if (numread != 1)
 223                         Sys_Error ("Couldn't read console input");
 224
 225                 if (recs[0].EventType == KEY_EVENT)
 226                 {
 227                         if (!recs[0].Event.KeyEvent.bKeyDown)
 228                         {
 229                                 ch = recs[0].Event.KeyEvent.uChar.AsciiChar;
 230
 231                                 switch (ch)
 232                                 {
 233                                         case '\r':
 234                                                 WriteFile(houtput, "\r\n", 2, &dummy, NULL);
 235
 236                                                 if (len)
 237                                                 {
 238                                                         text[len] = 0;
 239                                                         len = 0;
 240                                                         return text;
 241                                                 }
 242                                                 else if (sc_return_on_enter)
 243                                                 {
 244                                                 // special case to allow exiting from the error handler on Enter
 245                                                         text[0] = '\r';
 246                                                         len = 0;
 247                                                         return text;
 248                                                 }
 249
 250                                                 break;
 251
 252                                         case '\b':
 253                                                 WriteFile(houtput, "\b \b", 3, &dummy, NULL);
 254                                                 if (len)
 255                                                 {
 256                                                         len--;
 257                                                 }
 258                                                 break;
 259
 260                                         default:
 261                                                 if (ch >= ' ')
 262                                                 {
 263                                                         WriteFile(houtput, &ch, 1, &dummy, NULL);
 264                                                         text[len] = ch;
 265                                                         len = (len + 1) & 0xff;
 266                                                 }
 267
 268                                                 break;
 269
 270                                 }
 271                         }
 272                 }
 273         }
 274
 275         return NULL;
 276 }
 277
 278 void Sys_Sleep(int milliseconds)
 279 {
 280         if (milliseconds < 1)
 281                 milliseconds = 1;
 282         Sleep(milliseconds);
 283 }
 284
 285
 286 void Sys_SendKeyEvents (void)
 287 {
 288         MSG msg;
 289
 290         while (PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE))
 291         {
 292         // we always update if there are any event, even if we're paused
 293                 scr_skipupdate = 0;
 294
 295                 if (!GetMessage (&msg, NULL, 0, 0))
 296                         Sys_Quit ();
 297
 298                 TranslateMessage (&msg);
 299                 DispatchMessage (&msg);
 300         }
 301 }
 302
 303
 304 /*
 305 ==============================================================================
 306
 307 WINDOWS CRAP
 308
 309 ==============================================================================
 310 */
 311
 312
 313 void SleepUntilInput (int time)
 314 {
 315         MsgWaitForMultipleObjects(1, &tevent, false, time, QS_ALLINPUT);
 316 }
 317
 318
 319 /*
 320 ==================
 321 WinMain
 322 ==================
 323 */
 324 HINSTANCE       global_hInstance;
 325 const char      *argv[MAX_NUM_ARGVS];
 326 char            program_name[MAX_OSPATH];
 327
 328 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 329 {
 330         double frameoldtime, framenewtime;
 331         MEMORYSTATUS lpBuffer;
 332         int t;
 333
 334         /* previous instances do not exist in Win32 */
 335         if (hPrevInstance)
 336                 return 0;
 337
 338         global_hInstance = hInstance;
 339
 340         lpBuffer.dwLength = sizeof(MEMORYSTATUS);
 341         GlobalMemoryStatus (&lpBuffer);
 342
 343         com_argc = 1;
 344         program_name[sizeof(program_name)-1] = 0;
 345         GetModuleFileNameA(NULL, program_name, sizeof(program_name) - 1);
 346         argv[0] = program_name;
 347
 348         while (*lpCmdLine && (com_argc < MAX_NUM_ARGVS))
 349         {
 350                 while (*lpCmdLine && ((*lpCmdLine <= 32) || (*lpCmdLine > 126)))
 351                         lpCmdLine++;
 352
 353                 if (*lpCmdLine)
 354                 {
 355                         argv[com_argc] = lpCmdLine;
 356                         com_argc++;
 357
 358                         while (*lpCmdLine && ((*lpCmdLine > 32) && (*lpCmdLine <= 126)))
 359                                 lpCmdLine++;
 360
 361                         if (*lpCmdLine)
 362                         {
 363                                 *lpCmdLine = 0;
 364                                 lpCmdLine++;
 365                         }
 366                 }
 367         }
 368         com_argv = argv;
 369
 370         Sys_Shared_EarlyInit();
 371
 372         Cvar_RegisterVariable(&sys_usetimegettime);
 373
 374         tevent = CreateEvent(NULL, false, false, NULL);
 375
 376         if (!tevent)
 377                 Sys_Error ("Couldn't create event");
 378
 379         // LordHavoc: can't check cls.state because it hasn't been initialized yet
 380         // if (cls.state == ca_dedicated)
 381         if (COM_CheckParm("-dedicated"))
 382         {
 383                 if (!AllocConsole ())
 384                         Sys_Error ("Couldn't create dedicated server console");
 385
 386                 hinput = GetStdHandle (STD_INPUT_HANDLE);
 387                 houtput = GetStdHandle (STD_OUTPUT_HANDLE);
 388
 389         // give QHOST a chance to hook into the console
 390                 if ((t = COM_CheckParm ("-HFILE")) > 0)
 391                 {
 392                         if (t < com_argc)
 393                                 hFile = (HANDLE)atoi (com_argv[t+1]);
 394                 }
 395
 396                 if ((t = COM_CheckParm ("-HPARENT")) > 0)
 397                 {
 398                         if (t < com_argc)
 399                                 heventParent = (HANDLE)atoi (com_argv[t+1]);
 400                 }
 401
 402                 if ((t = COM_CheckParm ("-HCHILD")) > 0)
 403                 {
 404                         if (t < com_argc)
 405                                 heventChild = (HANDLE)atoi (com_argv[t+1]);
 406                 }
 407
 408                 InitConProc (hFile, heventParent, heventChild);
 409         }
 410
 411 // because sound is off until we become active
 412         S_BlockSound ();
 413
 414         Host_Init ();
 415
 416         Sys_Shared_LateInit();
 417
 418         frameoldtime = Sys_DoubleTime ();
 419
 420         /* main window message loop */
 421         while (1)
 422         {
 423                 if (cls.state != ca_dedicated)
 424                 {
 425                 // yield the CPU for a little while when paused, minimized, or not the focus
 426                         if ((cl.paused && !vid_activewindow) || vid_hidden)
 427                         {
 428                                 SleepUntilInput (PAUSE_SLEEP);
 429                                 scr_skipupdate = 1;             // no point in bothering to draw
 430                         }
 431                         else if (!vid_activewindow)
 432                                 SleepUntilInput (NOT_FOCUS_SLEEP);
 433                 }
 434
 435                 framenewtime = Sys_DoubleTime ();
 436                 Host_Frame (framenewtime - frameoldtime);
 437                 frameoldtime = framenewtime;
 438         }
 439
 440         /* return success of application */
 441         return true;
 442 }
 443