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SymbianOS.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/symbian/src/SymbianOS.cpp $
 * $Id: SymbianOS.cpp 30944 2008-02-23 22:50:18Z sev $
 */

#include <eikenv.h> // for CEikonEnv::Static() @ Symbian::FatalError()
#include <sdlapp.h> // for CSDLApp::GetExecutablePathCStr() @ Symbian::GetExecutablePath()

#include "backends/platform/symbian/src/SymbianOS.h"
#include "backends/platform/symbian/src/SymbianActions.h"
#include "common/config-manager.h"
#include "common/events.h"
#include "gui/Actions.h"
#include "gui/Key.h"
#include "gui/message.h"

#include "..\..\sdl\main.cpp"

#ifdef SAMPLES_PER_SEC_8000 // the GreanSymbianMMP format cannot handle values for defines :(
  #define SAMPLES_PER_SEC 8000
#else
  #define SAMPLES_PER_SEC 16000
#endif


////////// extern "C" ///////////////////////////////////////////////////
namespace Symbian {

// Show a simple Symbian Info win with Msg & exit
void FatalError(const char *msg) {
      TPtrC8 msgPtr((const TUint8 *)msg); 
      TBuf<512> msg16Bit;
      msg16Bit.Copy(msgPtr);
#ifdef S60
#else
      CEikonEnv::Static()->InfoWinL(_L("ScummVM Fatal Error"), msg16Bit);
#endif
      if (g_system)
            g_system->quit();
}

// make this easily available everywhere
char* GetExecutablePath() {
      return CSDLApp::GetExecutablePathCStr();
}

} // namespace Symbian {

////////// OSystem_SDL_Symbian //////////////////////////////////////////

static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
      {"1x", "Fullscreen", GFX_NORMAL},
      {0, 0, 0}
};

bool OSystem_SDL_Symbian::hasFeature(Feature f) {
      switch(f) {
            case kFeatureFullscreenMode:
            case kFeatureAspectRatioCorrection:
            case kFeatureAutoComputeDirtyRects:
            case kFeatureCursorHasPalette:
#ifdef  USE_VIBRA_SE_PXXX
            case kFeatureVibration:
#endif
                  return true;

            default:
                  return false;
      }
}

void OSystem_SDL_Symbian::setFeatureState(Feature f, bool enable) {
      switch(f) { 
            case kFeatureVirtualKeyboard:                   
                  if (enable) {                 
                  }
                  else {
                  
                  }
                  break;
            case kFeatureDisableKeyFiltering:
                  GUI::Actions::Instance()->beginMapping(enable);
                  break;
            default:
                  OSystem_SDL::setFeatureState(f, enable);
      }
}

OSystem_SDL_Symbian::zoneDesc OSystem_SDL_Symbian::_zones[TOTAL_ZONES] = {
        { 0, 0, 320, 145 },
        { 0, 145, 150, 55 },
        { 150, 145, 170, 55 }
};
OSystem_SDL_Symbian::OSystem_SDL_Symbian() :_channels(0),_stereo_mix_buffer(0) {
}

void OSystem_SDL_Symbian::initBackend() {
      ConfMan.set("extrapath", Symbian::GetExecutablePath());
      ConfMan.setBool("FM_high_quality", false);
#if !defined(S60) || defined(S60V3) // S60 has low quality as default
      ConfMan.setBool("FM_medium_quality", true);
#else
      ConfMan.setBool("FM_medium_quality", false);
#endif
      ConfMan.setInt("joystick_num", 0); // Symbian OS  should have joystick_num set to 0 in the ini file , but uiq devices might refuse opening the joystick
      ConfMan.flushToDisk();
      
      GUI::Actions::init();

      OSystem_SDL::initBackend();
      
      // Initialize global key mapping for Smartphones
      GUI::Actions* actions = GUI::Actions::Instance();

      actions->initInstanceMain(this);    
      actions->loadMapping();
      initZones();
}

OSystem_SDL_Symbian::~OSystem_SDL_Symbian() {
      delete []_stereo_mix_buffer;
}

int OSystem_SDL_Symbian::getDefaultGraphicsMode() const {
      return GFX_NORMAL;
}

const OSystem::GraphicsMode *OSystem_SDL_Symbian::getSupportedGraphicsModes() const {
      return s_supportedGraphicsModes;
}

// make sure we always go to normal, even if the string might be set wrong!
bool OSystem_SDL_Symbian::setGraphicsMode(const char * /*name*/) {
      // let parent OSystem_SDL handle it
      return OSystem_SDL::setGraphicsMode(getDefaultGraphicsMode());
}

void OSystem_SDL_Symbian::quitWithErrorMsg(const char * /*aMsg*/) {

      CEikonEnv::Static()->AlertWin(_L("quitWithErrorMsg()")) ;
      
      if (g_system)
            g_system->quit();
}

// Overloaded from SDL_Commmon
void OSystem_SDL_Symbian::quit() {
      delete GUI_Actions::Instance();
      OSystem_SDL::quit();
}

bool OSystem_SDL_Symbian::setSoundCallback(SoundProc proc, void *param) {

      // First save the proc and param
      _sound_proc_param = param; 
      _sound_proc = proc;
      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;

      // Originally, we always used 2048 samples. This loop will produce the
      // same result at 22050 Hz, and should hopefully produce something
      // sensible for other frequencies. Note that it must be a power of two.

      uint32 samples = 0x8000;

      for (;;) {
            if ((1000 * samples) / _samplesPerSec < 100)
                  break;
            samples >>= 1;
      }

      desired.freq = _samplesPerSec;
      desired.format = AUDIO_S16SYS;
      desired.channels = 2;
      desired.samples = (uint16)samples;
#ifdef S60
      desired.callback = symbianMixCallback;
      desired.userdata = this;
#else
      desired.callback = proc;
      desired.userdata = param;
#endif
      if (SDL_OpenAudio(&desired, &obtained) != 0) {
            warning("Could not open audio device: %s", SDL_GetError());
            return false;
      }
      // Note: This should be the obtained output rate, but it seems that at
      // least on some platforms SDL will lie and claim it did get the rate
      // even if it didn't. Probably only happens for "weird" rates, though.
      _samplesPerSec = obtained.freq;
      _channels = obtained.channels;

      // Need to create mixbuffer for stereo mix to downmix
      if (_channels != 2) {
            _stereo_mix_buffer = new byte [obtained.size*2];//*2 for stereo values
      }

      SDL_PauseAudio(0);
      return true;
}

/**
 * The mixer callback function, passed on to OSystem::setSoundCallback().
 * This simply calls the mix() method.
 */
void OSystem_SDL_Symbian::symbianMixCallback(void *s, byte *samples, int len) {
      static_cast <OSystem_SDL_Symbian*>(s)->symbianMix(samples,len);
}


/**
 * Actual mixing implementation
 */
void OSystem_SDL_Symbian::symbianMix(byte *samples, int len) {
      // If not stereo then we need to downmix
      if (_channels != 2) {
            _sound_proc(_sound_proc_param, _stereo_mix_buffer, len * 2);
            int16 *bitmixDst = (int16 *)samples;
            int16 *bitmixSrc = (int16 *)_stereo_mix_buffer;

            for (int loop = len / 2; loop >= 0; loop --) {
                  *bitmixDst = (*bitmixSrc + *(bitmixSrc + 1)) >> 1;
                  bitmixDst++;
                  bitmixSrc += 2;
            }
      } else
            _sound_proc(_sound_proc_param, samples, len);
}

/**
 * This is an implementation by the remapKey function
 * @param SDL_Event to remap
 * @param ScumVM event to modify if special result is requested
 * @return true if Common::Event has a valid return status
 */
bool OSystem_SDL_Symbian::remapKey(SDL_Event &ev, Common::Event &event) {
      if (GUI::Actions::Instance()->mappingActive() || ev.key.keysym.sym <= SDLK_UNKNOWN)
            return false;

      for (TInt loop = 0; loop < GUI::ACTION_LAST; loop++) {
            if (GUI::Actions::Instance()->getMapping(loop) == ev.key.keysym.sym && 
                  GUI::Actions::Instance()->isEnabled(loop)) {
                  // Create proper event instead
                  switch(loop) {
                  case GUI::ACTION_UP:    
                        if (ev.type == SDL_KEYDOWN) {
                              _km.y_vel = -1;
                              _km.y_down_count = 1;
                        } else {
                              _km.y_vel = 0;
                              _km.y_down_count = 0;
                        }
                        event.type = Common::EVENT_MOUSEMOVE;
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;                  

                  case GUI::ACTION_DOWN:
                        if (ev.type == SDL_KEYDOWN) {
                              _km.y_vel = 1;
                              _km.y_down_count = 1;
                        } else {
                              _km.y_vel = 0;
                              _km.y_down_count = 0;
                        }
                        event.type = Common::EVENT_MOUSEMOVE;
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;      

                  case GUI::ACTION_LEFT:
                        if (ev.type == SDL_KEYDOWN) {
                              _km.x_vel = -1;
                              _km.x_down_count = 1;
                        } else {
                              _km.x_vel = 0;
                              _km.x_down_count = 0;
                        }
                        event.type = Common::EVENT_MOUSEMOVE;
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;

                  case GUI::ACTION_RIGHT:
                        if (ev.type == SDL_KEYDOWN) {
                              _km.x_vel = 1;
                              _km.x_down_count = 1;
                        } else {
                              _km.x_vel = 0;
                              _km.x_down_count = 0;
                        }
                        event.type = Common::EVENT_MOUSEMOVE;
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;

                  case GUI::ACTION_LEFTCLICK:
                        event.type = (ev.type == SDL_KEYDOWN ? Common::EVENT_LBUTTONDOWN : Common::EVENT_LBUTTONUP);
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;

                  case GUI::ACTION_RIGHTCLICK:
                        event.type = (ev.type == SDL_KEYDOWN ? Common::EVENT_RBUTTONDOWN : Common::EVENT_RBUTTONUP);
                        fillMouseEvent(event, _km.x, _km.y);

                        return true;

                  case GUI::ACTION_ZONE:
                        if (ev.type == SDL_KEYDOWN) {
                              int i;                        
                              
                              for (i=0; i < TOTAL_ZONES; i++)
                                    if (_km.x >= _zones[i].x && _km.y >= _zones[i].y &&
                                          _km.x <= _zones[i].x + _zones[i].width && _km.y <= _zones[i].y + _zones[i].height
                                          ) {
                                          _mouseXZone[i] = _km.x;
                                          _mouseYZone[i] = _km.y;
                                          break;
                                    }
                                    _currentZone++;
                                    if (_currentZone >= TOTAL_ZONES)
                                          _currentZone = 0;
                                    event.type = Common::EVENT_MOUSEMOVE;
                                    fillMouseEvent(event, _mouseXZone[_currentZone], _mouseYZone[_currentZone]);
                                    SDL_WarpMouse(event.mouse.x, event.mouse.y);                            
                        }

                        return true;
                  case GUI::ACTION_MULTI: {
                        GUI::Key &key = GUI::Actions::Instance()->getKeyAction(loop);
                        // if key code is pause, then change event to interactive or just fall through
                        if (key.keycode() == SDLK_PAUSE) {
                              event.type = Common::EVENT_PREDICTIVE_DIALOG;
                              return true;
                              }
                        }
                  case GUI::ACTION_SAVE:
                  case GUI::ACTION_SKIP:
                  case GUI::ACTION_SKIP_TEXT:
                  case GUI::ACTION_PAUSE:
                  case GUI::ACTION_SWAPCHAR:
                  case GUI::ACTION_FASTMODE:
                  case GUI::ACTION_DEBUGGER: {
                              GUI::Key &key = GUI::Actions::Instance()->getKeyAction(loop);
                              ev.key.keysym.sym = (SDLKey) key.keycode();
                              ev.key.keysym.scancode = 0;
                              ev.key.keysym.mod = (SDLMod) key.flags();

                              // Translate from SDL keymod event to Scummvm Key Mod Common::Event. 
                              // This codes is also present in GP32 backend and in SDL backend as a static function
                              // Perhaps it should be shared. 
                              if (key.flags() != 0) {                                                 
                                    event.kbd.flags = 0;

                                    if (ev.key.keysym.mod & KMOD_SHIFT)
                                          event.kbd.flags |= Common::KBD_SHIFT;
                                    
                                    if (ev.key.keysym.mod & KMOD_ALT)
                                          event.kbd.flags |= Common::KBD_ALT;
                                    
                                    if (ev.key.keysym.mod & KMOD_CTRL)
                                          event.kbd.flags |= Common::KBD_CTRL;
                              }

                              return false;
                        }                 

                  case GUI::ACTION_QUIT:
                        {
                              GUI::MessageDialog alert("Do you want to quit ?", "Yes", "No");
                              if (alert.runModal() == GUI::kMessageOK)
                                    quit();

                              return true;
                        }
                  }
            }
      }

      return false;
}

void OSystem_SDL_Symbian::setWindowCaption(const char *caption) {
      OSystem_SDL::setWindowCaption(caption);
      check_mappings();
}

void OSystem_SDL_Symbian::check_mappings() {
      if (ConfMan.get("gameid").empty() || GUI::Actions::Instance()->initialized())
            return;

      GUI::Actions::Instance()->initInstanceGame();
}

void OSystem_SDL_Symbian::initZones() {
      int i;

      _currentZone = 0;

      for (i = 0; i < TOTAL_ZONES; i++) {
            _mouseXZone[i] = (_zones[i].x + (_zones[i].width / 2));
            _mouseYZone[i] = (_zones[i].y + (_zones[i].height / 2));
      }
}

// Symbian libc file functionality in order to provide shared file handles
struct TSymbianFileEntry {
      RFile iFileHandle;
};

#define FILE void

FILE*       symbian_fopen(const char* name, const char* mode) {
      TSymbianFileEntry* fileEntry = new TSymbianFileEntry;

      if (fileEntry != NULL) {
            TInt modeLen = strlen(mode);

            TPtrC8 namePtr((unsigned char*) name, strlen(name));
            TFileName tempFileName;       
            tempFileName.Copy(namePtr);
            
            TInt fileMode = EFileRead;
            
            if (mode[0] == 'a')
                  fileMode = EFileWrite;
            
            if (!((modeLen > 1 && mode[1] == 'b') || (modeLen > 2 && mode[2] == 'b'))) {
                  fileMode |= EFileStreamText;
            }
            
            if ((modeLen > 1 && mode[1] == '+') || (modeLen > 2 && mode[2] == '+')) {
                  fileMode = fileMode| EFileWrite;    
            }

            fileMode = fileMode| EFileShareAny;

            switch(mode[0]) {
            case 'a':
                  if (fileEntry->iFileHandle.Open(CEikonEnv::Static()->FsSession(), tempFileName, fileMode) != KErrNone) {
                        if (fileEntry->iFileHandle.Create(CEikonEnv::Static()->FsSession(), tempFileName, fileMode) != KErrNone) {
                              delete fileEntry;
                              fileEntry = NULL;
                        }
                  }
                  break;
            case 'r': 
                  if (fileEntry->iFileHandle.Open(CEikonEnv::Static()->FsSession(), tempFileName, fileMode) != KErrNone) {
                        delete fileEntry;
                        fileEntry = NULL;
                  }
                  break;
                  
            case 'w':
                  if (fileEntry->iFileHandle.Replace(CEikonEnv::Static()->FsSession(), tempFileName, fileMode) != KErrNone) {
                        delete fileEntry;
                        fileEntry = NULL;
                  }
                  break;
            }
      }
      return (FILE*) fileEntry;
}

void symbian_fclose(FILE* handle) {
      ((TSymbianFileEntry*)(handle))->iFileHandle.Close();

      delete (TSymbianFileEntry*)(handle);
}

size_t symbian_fread(const void* ptr, size_t size, size_t numItems, FILE* handle) {
      TPtr8 pointer( (unsigned char*) ptr, size*numItems);

      ((TSymbianFileEntry*)(handle))->iFileHandle.Read(pointer);
      
      return pointer.Length()/size;
}

size_t symbian_fwrite(const void* ptr, size_t size, size_t numItems, FILE* handle) {
      TPtrC8 pointer( (unsigned char*) ptr, size*numItems);

      if (((TSymbianFileEntry*)(handle))->iFileHandle.Write(pointer) == KErrNone) {
            return numItems;
      }

      return 0;
}

bool symbian_feof(FILE* handle) {
      TInt pos = 0;
      if (((TSymbianFileEntry*)(handle))->iFileHandle.Seek(ESeekCurrent, pos) == KErrNone) {

            TInt size = 0;
            if (((TSymbianFileEntry*)(handle))->iFileHandle.Size(size) == KErrNone) {
                  if (pos == size)
                        return true;
                  return false;
            }
      }
      return true;
}

long int symbian_ftell(FILE* handle) {
      TInt pos = 0;

      ((TSymbianFileEntry*)(handle))->iFileHandle.Seek(ESeekCurrent, pos);

      return pos;
}

int symbian_fseek(FILE* handle, long int offset, int whence) {
      TSeek seekMode = ESeekStart;
      TInt pos = offset;

      switch(whence) {
      case SEEK_SET:
            seekMode = ESeekStart;
            break;
      case SEEK_CUR:
            seekMode = ESeekCurrent;
            break;
      case SEEK_END:
            seekMode = ESeekEnd;
            break;
            
      }

      return ((TSymbianFileEntry*)(handle))->iFileHandle.Seek(seekMode, pos);
}

void symbian_clearerr(FILE* /*handle*/) {
}

/** Vibration support */
#ifdef  USE_VIBRA_SE_PXXX
void OSystem_SDL_Symbian::initializeVibration() {
      _vibrationApi = SonyEricsson::CVibration::NewL();
}

void OSystem_SDL_Symbian::vibrationOn(int vibraLength) {
      // initialize?
      if (!_vibrationApi) _vibrationApi = SonyEricsson::CVibration::NewL();
      // do it!
      _vibrationApi->VibrationOn(1, 1, vibraLength);
}

void OSystem_SDL_Symbian::vibrationOff() {
      _vibrationApi->VibrationOff();
}

#endif //  USE_SE_PXX_VIBRA


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