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gp2x.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/backends/platform/gp2x/gp2x.cpp $
 * $Id: gp2x.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */

/*
 * GP2X: Main backend.
 *
 */

#include "backends/platform/gp2x/gp2x-common.h"
#include "backends/platform/gp2x/gp2x-hw.h"
#include "backends/platform/gp2x/gp2x-mem.h"
#include "common/config-manager.h"
#include "common/file.h"
#include "common/util.h"
#include "base/main.h"

#include "backends/saves/default/default-saves.h"
#include "backends/timer/default/default-timer.h"
#include "backends/plugins/posix/posix-provider.h"
#include "sound/mixer.h"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <sys/stat.h>

// Disable for normal serial logging.
#define DUMP_STDOUT

#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif

static Uint32 timer_handler(Uint32 interval, void *param) {
      ((DefaultTimerManager *)param)->handler();
      return interval;
}

int main(int argc, char *argv[]) {
      extern OSystem *OSystem_GP2X_create();
      g_system = OSystem_GP2X_create();
      assert(g_system);

      // Invoke the actual ScummVM main entry point:
      int res = scummvm_main(argc, argv);
      g_system->quit();
      return res;
}

OSystem *OSystem_GP2X_create() {
      return new OSystem_GP2X();
}

void OSystem_GP2X::initBackend() {
      assert(!_inited);

      ConfMan.setInt("joystick_num", 0);
      int joystick_num = ConfMan.getInt("joystick_num");
      uint32 sdlFlags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;

      if (ConfMan.hasKey("disable_sdl_parachute"))
            sdlFlags |= SDL_INIT_NOPARACHUTE;

      if (joystick_num > -1)
            sdlFlags |= SDL_INIT_JOYSTICK;

      if (SDL_Init(sdlFlags) == -1) {
            error("Could not initialize SDL: %s", SDL_GetError());
      }

      SDL_ShowCursor(SDL_DISABLE);

      // Setup default save path to be workingdir/saves
      #ifndef PATH_MAX
            #define PATH_MAX 255
      #endif

      char savePath[PATH_MAX+1];
      char workDirName[PATH_MAX+1]; /* To be passed to getcwd system call. */
      if (getcwd(workDirName, PATH_MAX) == NULL) {
            error("Could not obtain current working directory.");
      } else {
            printf("Current working directory: %s\n", workDirName);
      }

      strcpy(savePath, workDirName);
      strcat(savePath, "/saves");
      printf("Current save directory: %s\n", savePath);
      struct stat sb;
      if (stat(savePath, &sb) == -1)
            if (errno == ENOENT) // Create the dir if it does not exist
                  if (mkdir(savePath, 0755) != 0)
                        warning("mkdir for '%s' failed!", savePath);

      ConfMan.registerDefault("savepath", savePath);

      // Setup default extra data path for engine data files to be workingdir/engine-data

      char enginedataPath[PATH_MAX+1];

      strcpy(enginedataPath, workDirName);
      strcat(enginedataPath, "/engine-data");
      printf("Current engine-data directory: %s\n", enginedataPath);
      //struct stat sb;
      if (stat(enginedataPath, &sb) == -1)
            if (errno == ENOENT) // Create the dir if it does not exist
                  if (mkdir(enginedataPath, 0755) != 0)
                        warning("mkdir for '%s' failed!", enginedataPath);

      Common::File::addDefaultDirectory(enginedataPath);

      // Note: Review and clean this, it's OTT at the moment.

      #if defined(DUMP_STDOUT)
            // The GP2X has a serial console but most users do not use this so we
            // output all our STDOUT and STDERR to files for debug purposes.
            char STDOUT_FILE[PATH_MAX+1];
            char STDERR_FILE[PATH_MAX+1];

            strcpy(STDOUT_FILE, workDirName);
            strcpy(STDERR_FILE, workDirName);
            strcat(STDOUT_FILE, "/scummvm.stdout.txt");
            strcat(STDERR_FILE, "/scummvm.stderr.txt");

            /* 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
            }
            setbuf(stderr, NULL);               /* No buffering */
      #endif // DUMP_STDOUT

      // Setup other defaults.

      ConfMan.registerDefault("aspect_ratio", true);
      ConfMan.registerDefault("music_volume", 220); // Up default volume as we use a seperate volume system anyway.
      ConfMan.registerDefault("sfx_volume", 220);
      ConfMan.registerDefault("speech_volume", 220);
      ConfMan.registerDefault("autosave_period", 3 * 60);   // Trigger autosave every 3 minutes - On low batts 4 mins is about your warning time.

      _graphicsMutex = createMutex();

      _cksumValid = false;
      _mode = GFX_NORMAL;
      _scaleFactor = 0;
      _scalerProc = Normal1x;
      _fullscreen = true;
      _adjustAspectRatio = ConfMan.getBool("aspect_ratio");
      _scalerType = 0;
      _modeFlags = 0;
      _adjustZoomOnMouse = false;
      ConfMan.setBool("FM_low_quality", true);

      // enable joystick
      if (joystick_num > -1 && SDL_NumJoysticks() > 0) {
            //printf("Using joystick: %s\n", SDL_JoystickName(0));
            _joystick = SDL_JoystickOpen(joystick_num);
      }

      // Create the savefile manager, if none exists yet (we check for this to
      // allow subclasses to provide their own).
      if (_savefile == 0) {
            _savefile = new DefaultSaveFileManager();
      }

      // Create and hook up the mixer, if none exists yet (we check for this to
      // allow subclasses to provide their own).
      if (_mixer == 0) {
            _mixer = new Audio::Mixer();
            setSoundCallback(Audio::Mixer::mixCallback, _mixer);
      }

      // Create and hook up the timer manager, if none exists yet (we check for
      // this to allow subclasses to provide their own).
      if (_timer == 0) {
            // TODO: We could implement a custom SDLTimerManager by using
            // SDL_AddTimer. That might yield better timer resolution, but it would
            // also change the semantics of a timer: Right now, ScummVM timers
            // *never* run in parallel, due to the way they are implemented. If we
            // switched to SDL_AddTimer, each timer might run in a separate thread.
            // Unfortunately, not all our code is prepared for that, so we can't just
            // switch. But it's a long term goal to do just that!
            _timer = new DefaultTimerManager();
            _timerID = SDL_AddTimer(10, &timer_handler, _timer);

      // Initialise any GP2X specific stuff we may want (Volume, Batt Status etc.)
      GP2X_device_init();

      // Set Default hardware mixer volume to a plesent level.
      // This is done to 'reset' volume level if set by other apps.
      GP2X_mixer_set_volume(70, 70);

      }

      //if (SDL_GP2X_MouseType() == 0) {
      //    // No mouse, F100 default state.
      //    _gp2xInputType = 0;
      //    displayMessageOnOSD("F100 GP2X Found");
      //}

      //if (SDL_GP2X_MouseType() == 1) {
      //    // USB mouse found.
      //    _gp2xInputType = 1;
      //    displayMessageOnOSD("USB Mouse Found");
      //}

      //if (SDL_GP2X_MouseType() == 2) {
      //    // F200 touch screen found. - F200 default state.
      //    _gp2xInputType = 2;
      //    displayMessageOnOSD("Touch Screen Found");
      //}

      OSystem::initBackend();

      _inited = true;
}

OSystem_GP2X::OSystem_GP2X()
      :
      _osdSurface(0), _osdAlpha(SDL_ALPHA_TRANSPARENT), _osdFadeStartTime(0),
      _hwscreen(0), _screen(0), _screenWidth(0), _screenHeight(0),
      _tmpscreen(0), _overlayWidth(0), _overlayHeight(0),
      _overlayVisible(false),
      _overlayscreen(0), _tmpscreen2(0),
      _samplesPerSec(0),
      _cdrom(0), _scalerProc(0), _modeChanged(false), _screenChangeCount(0), _dirtyChecksums(0),
      _mouseVisible(false), _mouseDrawn(false), _mouseData(0), _mouseSurface(0),
      _mouseOrigSurface(0), _cursorTargetScale(1), _cursorPaletteDisabled(true),
      _joystick(0),
      _currentShakePos(0), _newShakePos(0),
      _paletteDirtyStart(0), _paletteDirtyEnd(0),
      _savefile(0),
      _mixer(0),
      _timer(0),
      _graphicsMutex(0), _transactionMode(kTransactionNone) {

      // allocate palette storage
      _currentPalette = (SDL_Color *)calloc(sizeof(SDL_Color), 256);
      _cursorPalette = (SDL_Color *)calloc(sizeof(SDL_Color), 256);

      _mouseBackup.x = _mouseBackup.y = _mouseBackup.w = _mouseBackup.h = 0;

      // reset mouse state
      memset(&_km, 0, sizeof(_km));
      memset(&_mouseCurState, 0, sizeof(_mouseCurState));

      _inited = false;
}

OSystem_GP2X::~OSystem_GP2X() {
      SDL_RemoveTimer(_timerID);
      SDL_CloseAudio();

      free(_dirtyChecksums);
      free(_currentPalette);
      free(_cursorPalette);
      free(_mouseData);

      delete _savefile;
      delete _mixer;
      delete _timer;
}

uint32 OSystem_GP2X::getMillis() {
      return SDL_GetTicks();
}

void OSystem_GP2X::delayMillis(uint msecs) {
      SDL_Delay(msecs);
}

Common::TimerManager *OSystem_GP2X::getTimerManager() {
      assert(_timer);
      return _timer;
}

Common::SaveFileManager *OSystem_GP2X::getSavefileManager() {
      assert(_savefile);
      return _savefile;
}

//void OSystem_GP2X::setTimerCallback(TimerProc callback, int timer) {
//    SDL_SetTimer(timer, (SDL_TimerCallback) callback);
//}

bool OSystem_GP2X::hasFeature(Feature f) {
      return
            (f == kFeatureFullscreenMode) ||
            (f == kFeatureAspectRatioCorrection) ||
            (f == kFeatureAutoComputeDirtyRects) ||
            (f == kFeatureCursorHasPalette);
}

void OSystem_GP2X::setFeatureState(Feature f, bool enable) {
      switch (f) {
      case kFeatureFullscreenMode:
            return;
      case kFeatureAspectRatioCorrection:
            setAspectRatioCorrection(enable);
            break;
      case kFeatureAutoComputeDirtyRects:
            if (enable)
                  _modeFlags |= DF_WANT_RECT_OPTIM;
            else
                  _modeFlags &= ~DF_WANT_RECT_OPTIM;
            break;
      case kFeatureDisableKeyFiltering:
            // TODO: Extend as more support for this is added to engines.
            return;
      default:
            break;
      }
}

bool OSystem_GP2X::getFeatureState(Feature f) {
      assert (_transactionMode == kTransactionNone);

      switch (f) {
      case kFeatureFullscreenMode:
            return false;
      //case kFeatureFullscreenMode:
      //    return _fullscreen;
      case kFeatureAspectRatioCorrection:
            return _adjustAspectRatio;
      case kFeatureAutoComputeDirtyRects:
            return _modeFlags & DF_WANT_RECT_OPTIM;
      default:
            return false;
      }
}

void OSystem_GP2X::quit() {
      unloadGFXMode();
      deleteMutex(_graphicsMutex);

      if (_joystick)
            SDL_JoystickClose(_joystick);
      //CloseRam();
      GP2X_device_deinit();
      SDL_Quit();
      //chdir("/usr/gp2x");
      //execl("/usr/gp2x/gp2xmenu", "/usr/gp2x/gp2xmenu", NULL);
      exit(0);
}

OSystem::MutexRef OSystem_GP2X::createMutex(void) {
      return (MutexRef) SDL_CreateMutex();
}

void OSystem_GP2X::lockMutex(MutexRef mutex) {
      SDL_mutexP((SDL_mutex *) mutex);
}

void OSystem_GP2X::unlockMutex(MutexRef mutex) {
      SDL_mutexV((SDL_mutex *) mutex);
}

void OSystem_GP2X::deleteMutex(MutexRef mutex) {
      SDL_DestroyMutex((SDL_mutex *) mutex);
}

#pragma mark -
#pragma mark --- Audio ---
#pragma mark -

bool OSystem_GP2X::setSoundCallback(SoundProc proc, void *param) {
      SDL_AudioSpec desired;
      SDL_AudioSpec obtained;

      memset(&desired, 0, sizeof(desired));

      _samplesPerSec = 0;

      if (ConfMan.hasKey("output_rate"))
            _samplesPerSec = ConfMan.getInt("output_rate");

      if (_samplesPerSec <= 0)
            _samplesPerSec = SAMPLES_PER_SEC;

      //Quick EVIL Hack - DJWillis
      _samplesPerSec = 11025;

      desired.freq = _samplesPerSec;
      desired.format = AUDIO_S16SYS;
      desired.channels = 2;
      //desired.samples = (uint16)samples;
      desired.samples = 128; // Samples hack
      desired.callback = proc;
      desired.userdata = param;
      if (SDL_OpenAudio(&desired, &obtained) != 0) {
            warning("Could not open audio device: %s", SDL_GetError());
            return false;
      }
      _samplesPerSec = obtained.freq;
      SDL_PauseAudio(0);
      return true;
}

void OSystem_GP2X::clearSoundCallback() {
      SDL_CloseAudio();
}

int OSystem_GP2X::getOutputSampleRate() const {
      return _samplesPerSec;
}

Audio::Mixer *OSystem_GP2X::getMixer() {
      assert(_mixer);
      return _mixer;
}

#pragma mark -
#pragma mark --- CD Audio ---
#pragma mark -

bool OSystem_GP2X::openCD(int drive) {
      return (_cdrom = NULL);
}

void OSystem_GP2X::stopCD() {
}

void OSystem_GP2X::playCD(int track, int num_loops, int start_frame, int duration) {
      return;
}

bool OSystem_GP2X::pollCD() {
            return false;
}

void OSystem_GP2X::updateCD() {
      return;
}

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