Logo Search packages:      
Sourcecode: scummvm version File versions  Download package

main.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2005 The ScummVM project
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/base/main.cpp,v 1.93.2.3 2005/10/28 19:03:55 sev Exp $
 *
 */

/*! \mainpage %ScummVM Source Reference
 *
 * These pages contains a cross referenced documentation for the %ScummVM source code,
 * generated with Doxygen (http://www.doxygen.org) directly from the source.
 * Currently not much is actually properly documented, but at least you can get an overview
 * of almost all the classes, methods and variables, and how they interact.
 */

#include "common/stdafx.h"
#include "base/engine.h"
#include "base/gameDetector.h"
#include "base/plugins.h"
#include "base/version.h"
#include "common/config-manager.h"
#include "common/file.h"
#include "common/system.h"
#include "common/timer.h"
#include "gui/newgui.h"
#include "gui/launcher.h"
#include "gui/message.h"
#include "sound/mididrv.h"

#ifdef _WIN32_WCE
#include "backends/wince/CELauncherDialog.h"
#endif

#ifdef __DC__
#include "backends/dc/DCLauncherDialog.h"
#endif

#ifdef PALMOS_68K
#include "args.h"
#endif

/*
 * Version string and build date string. These can be used by anything that
 * wants to display this information to the user (e.g. about dialog).
 *
 * Note: it would be very nice if we could instead of (or in addition to) the
 * build date present a date which corresponds to the date our source files
 * were last changed. To understand the difference, imagine that a user
 * makes a checkout of CVS on January 1, then after a week compiles it
 * (e.g. after doing a 'make clean'). The build date then will say January 8
 * even though the files were last changed on January 1.
 *
 * Another problem is that __DATE__/__TIME__ depend on the local time zone.
 *
 * It's clear that such a "last changed" date would be much more useful to us
 * for feedback purposes. After all, when somebody files a bug report, we
 * don't care about the build date, we want to know which date their checkout
 * was made. This is even more important now since anon CVS lags a few
 * days behind developer CVS.
 *
 * So, how could we implement this? At least on unix systems, a special script
 * could do it. Basically, that script would run over all .cpp/.h files and
 * parse the CVS 'Header' keyword we have in our file headers.
 * That line contains a date/time in GMT. Now, the script just has to collect
 * all these times and find the latest. This time then would be inserted into
 * a header file or so (common/date.h ?) which engine.cpp then could
 * include and put into a global variable analog to gScummVMBuildDate.
 *
 * Drawback: scanning all source/header files will be rather slow. Also, this
 * only works on systems which can run powerful enough scripts (so I guess
 * Visual C++ would be out of the game here? don't know VC enough to be sure).
 *
 * Another approach would be to somehow get CVS to update a global file
 * (e.g. LAST_CHANGED) whenever any checkins are made. That would be
 * faster and work w/o much "logic" on the client side, in particular no
 * scripts have to be run. The problem with this is that I am not even
 * sure it's actually possible! Modifying files during commit time is trivial
 * to setup, but I have no idea if/how one can also change files which are not
 * currently being commit'ed.
 */
const char *gScummVMVersion = "0.8.0";
const char *gScummVMBuildDate = __DATE__ " " __TIME__;
const char *gScummVMFullVersion = "ScummVM 0.8.0 (" __DATE__ " " __TIME__ ")";
const char *gScummVMFeatures = ""
#ifdef USE_TREMOR
      "Tremor "
#else
#ifdef USE_VORBIS
      "Vorbis "
#endif
#endif
      
#ifdef USE_FLAC
      "FLAC "
#endif

#ifdef USE_MAD
      "MP3 "
#endif

#ifdef USE_ALSA
      "ALSA "
#endif

#ifdef USE_ZLIB
      "zLib "
#endif

#ifdef USE_MPEG2
      "MPEG2 "
#endif

#ifdef USE_FLUIDSYNTH
      "FluidSynth "
#endif

      ;

#if defined(__amigaos4__)
// Set the stack cookie, 640 KB should be enough for everyone
const char* stackCookie = "$STACK: 655360\0";
#endif

#if defined(WIN32) && defined(NO_CONSOLE)
#include <cstdio>
#define STDOUT_FILE     TEXT("stdout.txt")
#define STDERR_FILE     TEXT("stderr.txt")
#elif defined(__SYMBIAN32__) // Symbian does not like any output to the console through any *print* function
#define STDOUT_FILE           SYMBIAN32_DOC_DIR "scummvm.stdout.txt"
#define STDERR_FILE           SYMBIAN32_DOC_DIR "scummvm.stderr.txt"
#endif

#if defined(QTOPIA)
// FIXME - why exactly is this needed?
extern "C" int main(int argc, char *argv[]);
#endif

#if defined(MACOSX) || defined(QTOPIA) || defined(__SYMBIAN32__)
#include <SDL.h>
#elif !defined(__MORPHOS__) && !defined(__DC__) && !defined(__GP32__)
#undef main
#endif

#if defined (ALLEGRO_BACKEND)
#include "allegro.h"
#endif

#ifdef __SYMBIAN32__
#include "gui/Actions.h"
#endif

#if defined(UNIX)
#include <signal.h>

#ifndef SCUMM_NEED_ALIGNMENT
static void handle_errors(int sig_num) {
      error("Your system does not support unaligned memory accesses. Please rebuild with SCUMM_NEED_ALIGNMENT (signal %d)", sig_num);
}
#endif

/* This function is here to test if the endianness / alignement compiled it is matching
   with the one at run-time. */
static void do_memory_test(void) {
      unsigned char test[8] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88 };
      unsigned int value;
      /* First test endianness */
#ifdef SCUMM_LITTLE_ENDIAN
      if (*((int *) test) != 0x44332211) {
            error("Compiled as LITTLE_ENDIAN on a big endian system. Please rebuild ");
      }
      value = 0x55443322;
#else
      if (*((int *) test) != 0x11223344) {
            error("Compiled as BIG_ENDIAN on a little endian system. Please rebuild ");
      }
      value = 0x22334455;
#endif
      /* Then check if one really supports unaligned memory accesses */
#ifndef SCUMM_NEED_ALIGNMENT
      signal(SIGBUS, handle_errors);
      signal(SIGABRT, handle_errors);
      signal(SIGSEGV, handle_errors);
      if (*((unsigned int *) ((char *) test + 1)) != value) {
            error("Your system does not support unaligned memory accesses. Please rebuild with SCUMM_NEED_ALIGNMENT ");
      }
      signal(SIGBUS, SIG_DFL);
      signal(SIGABRT, SIG_DFL);
      signal(SIGSEGV, SIG_DFL);
#endif
}

#endif

/**
 * The debug level. Initially set to -1, indicating that no debug output
 * should be shown. Positive values usually imply an increasing number of
 * debug output shall be generated, the higher the value, the more verbose the
 * information (although the exact semantics are up to the engines).
 */
int gDebugLevel = -1;

static void setupDummyPalette(OSystem &system) {
      // FIXME - mouse cursors are currently always set via 8 bit data.
      // Thus for now we need to setup a dummy palette. On the long run, we might
      // want to add a setMouseCursor_overlay() method to OSystem, which would serve
      // two purposes:
      // 1) allow for 16 bit mouse cursors in overlay mode
      // 2) no need to backup & restore the mouse cursor before/after the overlay is shown
      const byte dummy_palette[] = {
            0, 0, 0, 0,
            0, 0, 171, 0,
            0, 171, 0, 0,
            0, 171, 171, 0,
            171, 0, 0, 0,
            171, 0, 171, 0,
            171, 87, 0, 0,
            171, 171, 171, 0,
            87, 87, 87, 0,
            87, 87, 255, 0,
            87, 255, 87, 0,
            87, 255, 255, 0,
            255, 87, 87, 0,
            255, 87, 255, 0,
            255, 255, 87, 0,
            255, 255, 255, 0,
      };

      system.setPalette(dummy_palette, 0, 16);
}

static bool launcherDialog(GameDetector &detector, OSystem &system) {

      system.beginGFXTransaction();
            // Set the user specified graphics mode (if any).
            system.setGraphicsMode(ConfMan.get("gfx_mode").c_str());

            // Make GUI 640 x 400
            system.initSize(320, 200, (detector._force1xOverlay ? 1 : 2));
      system.endGFXTransaction();


      // Clear the main screen
      system.clearScreen();

      // Setup a dummy palette, for the mouse cursor
      setupDummyPalette(system);

#if defined(_WIN32_WCE)
      CELauncherDialog dlg(detector);
#elif defined(__DC__)
      DCLauncherDialog dlg(detector);
#else
      GUI::LauncherDialog dlg(detector);
#endif
      return (dlg.runModal() != -1);
}

static int runGame(GameDetector &detector, OSystem &system) {
      // Create the game engine
      Engine *engine = detector.createEngine(&system);
      if (!engine) {
            // TODO: Show an error dialog or so?
            //GUI::MessageDialog alert("ScummVM could not find any game in the specified directory!");
            //alert.runModal();
            warning("Failed to instantiate engine for target %s", detector._targetName.c_str());
            return 0;
      }


      // Set the window caption to the game name
      Common::String caption(ConfMan.get("description", detector._targetName));

      if (caption.isEmpty() && detector._game.description)
            caption = detector._game.description;
      if (caption.isEmpty())
            caption = detector._targetName;
      if (!caption.isEmpty()) {
            system.setWindowCaption(caption.c_str());
      }

      // Add extrapath (if any) to the directory search list
      if (ConfMan.hasKey("extrapath"))
            Common::File::addDefaultDirectory(ConfMan.get("extrapath"));

      if (ConfMan.hasKey("extrapath", Common::ConfigManager::kApplicationDomain))
            Common::File::addDefaultDirectory(ConfMan.get("extrapath", Common::ConfigManager::kApplicationDomain));

      int result;

      // Init the engine (this might change the screen parameters
      result = engine->init(detector);

      // Run the game engine if the initialization was successful.
      if (result == 0) {
            result = engine->go();
      }

      // Free up memory
      delete engine;

      // Stop all sound processing now (this prevents some race conditions later on)
      system.clearSoundCallback();

      return result;
}

#ifdef _WIN32_WCE
extern "C" int scummvm_main(GameDetector &detector, int argc, char *argv[]) {
#elif defined(__PLAYSTATION2__) || defined(__PSP__)
extern "C" int scummvm_main(int argc, char *argv[]) {
#else
extern "C" int main(int argc, char *argv[]) {
#endif
      char *cfgFilename = NULL;
      char *s=NULL;//argv[1]; SumthinWicked says: cannot assume that argv!=NULL here! eg. Symbian's CEBasicAppUI::SDLStartL() calls as main(0,NULL), if you want to change plz #ifdef __SYMBIAN32__
      bool running = true;

#if defined(UNIX)
      /* On Unix, do a quick endian / alignement check before starting */
      do_memory_test();
#endif

// Code copied from SDL_main
#if (defined(WIN32) && defined(NO_CONSOLE)) || defined(__SYMBIAN32__)
// Symbian does not like any output to the console through any *print* function

      /* Flush the output in case anything is queued */
      fclose(stdout);
      fclose(stderr);

      /* Redirect standard input and standard output */
      FILE *newfp = freopen(STDOUT_FILE, "w", stdout);
      if (newfp == NULL) {    /* This happens on NT */
#if !defined(stdout)
            stdout = fopen(STDOUT_FILE, "w");
#else
            newfp = fopen(STDOUT_FILE, "w");
            if (newfp) {
                  *stdout = *newfp;
            }
#endif
      }
      newfp = freopen(STDERR_FILE, "w", stderr);
      if (newfp == NULL) {    /* This happens on NT */
#if !defined(stderr)
            stderr = fopen(STDERR_FILE, "w");
#else
            newfp = fopen(STDERR_FILE, "w");
            if (newfp) {
                  *stderr = *newfp;
            }
#endif
      }
#ifndef __SYMBIAN32__ // fcn not supported on Symbian
      setlinebuf(stdout);     /* Line buffered */
#endif
      setbuf(stderr, NULL);               /* No buffering */

#endif // (defined(WIN32) && defined(NO_CONSOLE)) || defined(__SYMBIAN32__)

      // Quick preparse of command-line, looking for alt configfile path
      for (int i = argc - 1; i >= 1; i--) {
            s = argv[i];
            bool shortOpt = (s[0] == '-' && tolower(s[1]) == 'c');
            bool longOpt  = (s[0] == '-' && s[1] == '-'  && s[2] == 'c' && s[3] == 'o' \
                         && s[4] == 'n' && s[5] == 'f' && s[6] == 'i' && s[7] == 'g');

            if (shortOpt || longOpt) {
                  if (longOpt) s+=9;
                  if (shortOpt) s+=2;

                  if (*s == '\0')
                        break;

                  cfgFilename = s;
                  break;
            }
      }
      if (cfgFilename != NULL)
            ConfMan.loadConfigFile(cfgFilename);
      else
            ConfMan.loadDefaultConfigFile();

      if (ConfMan.hasKey("debuglevel"))
            gDebugLevel = ConfMan.getInt("debuglevel");

      // Update the config file
      ConfMan.set("versioninfo", gScummVMVersion, Common::ConfigManager::kApplicationDomain);

      // Load the plugins
      PluginManager::instance().loadPlugins();

      // Parse the command line information
#ifndef _WIN32_WCE
      GameDetector detector;
#endif

#ifdef __SYMBIAN32__
      // init keymap support here: we wanna move this somewhere else?
      GUI::Actions::init(detector);
#endif

      // Ensure the system object exists (it may have already been created
      // at an earlier point, though!)
      OSystem &system = OSystem::instance();

      detector.parseCommandLine(argc, argv);

#ifdef PALMOS_68K
      ArgsFree(argv);
#endif

      // Init the backend. Must take place after all config data (including
      // the command line params) was read.
      system.initBackend();

      // Create the timer services
      Common::g_timer = new Common::Timer(&system);

      // Set initial window caption
      system.setWindowCaption(gScummVMFullVersion);

      // Unless a game was specified, show the launcher dialog
      if (detector._targetName.isEmpty())
            running = launcherDialog(detector, system);
      else
            // Setup a dummy palette, for the mouse cursor, in case an error
            // dialog has to be shown. See bug #1097467.
            setupDummyPalette(system);

      // FIXME: We're now looping the launcher. This, of course, doesn't
      // work as well as it should. In theory everything should be destroyed
      // cleanly, so this is now enabled to encourage people to fix bits :)
      while (running) {
            // Verify the given game name is a valid supported game
            if (detector.detectMain()) {
                  // Unload all plugins not needed for this game,
                  // to save memory
                  PluginManager::instance().unloadPluginsExcept(detector._plugin);

                  int result = runGame(detector, system);
                  if (result == 0)
                        break;

                  // There are some command-line options that it's
                  // unlikely that we want to preserve now that we're
                  // going to start a different game.
                  ConfMan.removeKey("boot_param", ConfMan.kTransientDomain);
                  ConfMan.removeKey("save_slot", ConfMan.kTransientDomain);

                  // PluginManager::instance().unloadPlugins();
                  PluginManager::instance().loadPlugins();
            }

            running = launcherDialog(detector, system);
      }

      // ...and quit (the return 0 should never be reached)
      delete Common::g_timer;
      system.quit();

      error("If you are seeing this, your OSystem backend is not working properly");

      return 0;
}
// allegro needs this for some reason...
#if defined(ALLEGRO_BACKEND)
END_OF_MAIN();
#endif

static void debugHelper(char *buf) {
#ifndef _WIN32_WCE
      printf("%s\n", buf);
#endif

#if defined( USE_WINDBG )
      strcat(buf, "\n");
#if defined( _WIN32_WCE )
      TCHAR buf_unicode[1024];
      MultiByteToWideChar(CP_ACP, 0, buf, strlen(buf) + 1, buf_unicode, sizeof(buf_unicode));
      OutputDebugString(buf_unicode);
#else
      OutputDebugString(buf);
#endif
#endif

      fflush(stdout);
}

void CDECL debug(int level, const char *s, ...) {
      char buf[STRINGBUFLEN];
      va_list va;

      if (level > gDebugLevel)
            return;

      va_start(va, s);
#ifdef __SYMBIAN32__
      vsprintf(buf, s, va);
#else
      vsnprintf(buf, STRINGBUFLEN, s, va);
#endif
      va_end(va);

      debugHelper(buf);
}

void CDECL debug(const char *s, ...) {
      char buf[STRINGBUFLEN];
      va_list va;

      va_start(va, s);
#ifdef __SYMBIAN32__
      vsprintf(buf, s, va);
#else
      vsnprintf(buf, STRINGBUFLEN, s, va);
#endif
      va_end(va);

      debugHelper(buf);
}

Generated by  Doxygen 1.6.0   Back to index