main_sdl.c

/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2005 John Fitzgibbons and others
Copyright (C) 2007-2008 Kristian Duske
Copyright (C) 2010-2014 QuakeSpasm developers

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "quakedef.h"
#include <SDL2/SDL.h>
#include <stdio.h>

static void Sys_AtExit(void) {
  SDL_Quit();
}

static void Sys_InitSDL(void) {
#if defined(USE_SDL2)
  SDL_version v;
  SDL_version* sdl_version = &v;
  SDL_GetVersion(&v);
#else
  const SDL_version* sdl_version = SDL_Linked_Version();
#endif

  Sys_Printf("Found SDL version %i.%i.%i\n", sdl_version->major,
             sdl_version->minor, sdl_version->patch);

  if (SDL_Init(0) < 0) {
    Sys_Error("Couldn't init SDL: %s", SDL_GetError());
  }
  atexit(Sys_AtExit);
}

#define DEFAULT_MEMORY \
  (256 * 1024 * 1024)  // ericw -- was 72MB (64-bit) / 64MB (32-bit)

static quakeparms_t parms;

// On OS X we call SDL_main from the launcher, but SDL2 doesn't redefine main
// as SDL_main on OS X anymore, so we do it ourselves.
/* #if defined(USE_SDL2) && defined(__APPLE__) */
/* #define main SDL_main */
/* #endif */

int main(int argc, char* argv[]) {
  int t;
  double time, oldtime, newtime;

  host_parms = &parms;
  parms.basedir = ".";

  parms.argc = argc;
  parms.argv = argv;

  parms.errstate = 0;

  COM_InitArgv(parms.argc, parms.argv);

  isDedicated = (COM_CheckParm("-dedicated") != 0);

  Sys_InitSDL();

  Sys_Init();

  Sys_Printf("Initializing QuakeSpasm v%s\n", QUAKESPASM_VER_STRING);

  parms.memsize = DEFAULT_MEMORY;
  if (COM_CheckParm("-heapsize")) {
    t = COM_CheckParm("-heapsize") + 1;
    if (t < com_argc)
      parms.memsize = Q_atoi(com_argv[t]) * 1024;
  }

  parms.membase = malloc(parms.memsize);

  if (!parms.membase)
    Sys_Error("Not enough memory free; check disk space\n");

  Sys_Printf("Host_Init\n");
  Host_Init();

  oldtime = Sys_DoubleTime();
  if (isDedicated) {
    while (1) {
      newtime = Sys_DoubleTime();
      time = newtime - oldtime;

      while (time < sys_ticrate.value) {
        SDL_Delay(1);
        newtime = Sys_DoubleTime();
        time = newtime - oldtime;
      }

      Host_Frame(time);
      oldtime = newtime;
    }
  } else
    while (1) {
      /* If we have no input focus at all, sleep a bit */
      if (!VID_HasMouseOrInputFocus() || cl.paused) {
        SDL_Delay(16);
      }
      /* If we're minimised, sleep a bit more */
      if (VID_IsMinimized()) {
        scr_skipupdate = 1;
        SDL_Delay(32);
      } else {
        scr_skipupdate = 0;
      }
      newtime = Sys_DoubleTime();
      time = newtime - oldtime;

      Host_Frame(time);

      if (time < sys_throttle.value && !cls.timedemo)
        SDL_Delay(1);

      oldtime = newtime;
    }

  return 0;
}