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osys_iphone.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-0-13-1/backends/platform/iphone/osys_iphone.cpp $
 * $Id: osys_iphone.cpp 39986 2009-04-18 14:28:49Z vinterstum $
 *
 */

#if defined(IPHONE_BACKEND)

#include <unistd.h>
#include <pthread.h>

#include "common/scummsys.h"
#include "common/util.h"
#include "common/rect.h"
#include "common/file.h"
#include "common/fs.h"

#include "base/main.h"

#include "backends/saves/default/default-saves.h"
#include "backends/timer/default/default-timer.h"
#include "sound/mixer.h"
#include "sound/mixer_intern.h"
#include "gui/message.h"

#include "osys_iphone.h"
#include "blit_arm.h"
#include <sys/time.h>

#include <CoreGraphics/CGDirectDisplay.h>
#include <CoreSurface/CoreSurface.h>

const OSystem::GraphicsMode OSystem_IPHONE::s_supportedGraphicsModes[] = {
      {0, 0, 0}
};

AQCallbackStruct OSystem_IPHONE::s_AudioQueue;
SoundProc OSystem_IPHONE::s_soundCallback = NULL;
void *OSystem_IPHONE::s_soundParam = NULL;

OSystem_IPHONE::OSystem_IPHONE() :
      _savefile(NULL), _mixer(NULL), _timer(NULL), _offscreen(NULL),
      _overlayVisible(false), _overlayBuffer(NULL), _fullscreen(NULL),
      _mouseHeight(0), _mouseWidth(0), _mouseBuf(NULL), _lastMouseTap(0),
      _secondaryTapped(false), _lastSecondaryTap(0), _screenOrientation(kScreenOrientationFlippedLandscape),
      _needEventRestPeriod(false), _mouseClickAndDragEnabled(false), _touchpadModeEnabled(true),
      _gestureStartX(-1), _gestureStartY(-1), _fullScreenIsDirty(false), _fullScreenOverlayIsDirty(false),
      _mouseDirty(false), _timeSuspended(0), _lastDragPosX(-1), _lastDragPosY(-1), _screenChangeCount(0)

{
      _queuedInputEvent.type = (Common::EventType)0;
      _lastDrawnMouseRect = Common::Rect(0, 0, 0, 0);

      _fsFactory = new POSIXFilesystemFactory();
}

OSystem_IPHONE::~OSystem_IPHONE() {
      AudioQueueDispose(s_AudioQueue.queue, true);

      delete _fsFactory;
      delete _savefile;
      delete _mixer;
      delete _timer;
      delete _offscreen;
      delete _fullscreen;
}

int OSystem_IPHONE::timerHandler(int t) {
      DefaultTimerManager *tm = (DefaultTimerManager *)g_system->getTimerManager();
      tm->handler();
      return t;
}

void OSystem_IPHONE::initBackend() {
      _savefile = new DefaultSaveFileManager(SCUMMVM_SAVE_PATH);
      _timer = new DefaultTimerManager();

      gettimeofday(&_startTime, NULL);

      setupMixer();

      setTimerCallback(&OSystem_IPHONE::timerHandler, 10);

      OSystem::initBackend();
}

bool OSystem_IPHONE::hasFeature(Feature f) {
      return false;
}

void OSystem_IPHONE::setFeatureState(Feature f, bool enable) {
}

bool OSystem_IPHONE::getFeatureState(Feature f) {
      return false;
}

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


int OSystem_IPHONE::getDefaultGraphicsMode() const {
      return -1;
}

bool OSystem_IPHONE::setGraphicsMode(const char *mode) {
      return true;
}

bool OSystem_IPHONE::setGraphicsMode(int mode) {
      return true;
}

int OSystem_IPHONE::getGraphicsMode() const {
      return -1;
}

void OSystem_IPHONE::initSize(uint width, uint height) {
      //printf("initSize(%i, %i)\n", width, height);

      _screenWidth = width;
      _screenHeight = height;

      free(_offscreen);

      _offscreen = (byte *)malloc(width * height);
      bzero(_offscreen, width * height);

      free(_overlayBuffer);

      int fullSize = _screenWidth * _screenHeight * sizeof(OverlayColor);
      _overlayBuffer = (OverlayColor *)malloc(fullSize);
      clearOverlay();

      free(_fullscreen);

      _fullscreen = (uint16 *)malloc(fullSize);
      bzero(_fullscreen, fullSize);

      if (_screenOrientation != kScreenOrientationPortrait)
            iPhone_initSurface(height, width, true);
      else
            iPhone_initSurface(width, height, false);

      _fullScreenIsDirty = false;
      dirtyFullScreen();
      _mouseVisible = false;
      _screenChangeCount++;
      updateScreen();
}

int16 OSystem_IPHONE::getHeight() {
      return _screenHeight;
}

int16 OSystem_IPHONE::getWidth() {
      return _screenWidth;
}

void OSystem_IPHONE::setPalette(const byte *colors, uint start, uint num) {
      //printf("setPalette()\n");
      const byte *b = colors;

      for (uint i = start; i < start + num; ++i) {
            _palette[i] = Graphics::RGBToColor<Graphics::ColorMasks<565> >(b[0], b[1], b[2]);
            b += 4;
      }

      dirtyFullScreen();
}

void OSystem_IPHONE::grabPalette(byte *colors, uint start, uint num) {
      //printf("grabPalette()\n");
}

void OSystem_IPHONE::copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h) {
      //printf("copyRectToScreen(%i, %i, %i, %i)\n", x, y, w, h);
      //Clip the coordinates
      if (x < 0) {
            w += x;
            buf -= x;
            x = 0;
      }

      if (y < 0) {
            h += y;
            buf -= y * pitch;
            y = 0;
      }

      if (w > _screenWidth - x) {
            w = _screenWidth - x;
      }

      if (h > _screenHeight - y) {
            h = _screenHeight - y;
      }

      if (w <= 0 || h <= 0)
            return;

      if (!_fullScreenIsDirty) {
            _dirtyRects.push_back(Common::Rect(x, y, x + w, y + h));
      }


      byte *dst = _offscreen + y * _screenWidth + x;
      if (_screenWidth == pitch && pitch == w)
            memcpy(dst, buf, h * w);
      else {
            do {
                  memcpy(dst, buf, w);
                  buf += pitch;
                  dst += _screenWidth;
            } while (--h);
      }
}

void OSystem_IPHONE::clipRectToScreen(int16 &x, int16 &y, int16 &w, int16 &h) {
      if (x < 0) {
            w += x;
            x = 0;
      }

      if (y < 0) {
            h += y;
            y = 0;
      }

      if (w > _screenWidth - x)
            w = _screenWidth - x;

      if (h > _screenHeight - y)
            h = _screenHeight - y;

      if (w < 0) {
            w = 0;
      }

      if (h < 0) {
            h = 0;
      }
}

void OSystem_IPHONE::updateScreen() {
      //printf("updateScreen(): %i dirty rects.\n", _dirtyRects.size());

      if (_dirtyRects.size() == 0 && _dirtyOverlayRects.size() == 0 && !_mouseDirty)
            return;

      internUpdateScreen();
      _fullScreenIsDirty = false;
      _fullScreenOverlayIsDirty = false;  

      //memcpy(iPhone_getSurface(), _fullscreen, _screenWidth * _screenHeight * 2);

      iPhone_updateScreen();
}

void OSystem_IPHONE::internUpdateScreen() {
      int16 mouseX = _mouseX - _mouseHotspotX;
      int16 mouseY = _mouseY - _mouseHotspotY;
      int16 mouseWidth = _mouseWidth;
      int16 mouseHeight = _mouseHeight;

      clipRectToScreen(mouseX, mouseY, mouseWidth, mouseHeight);

      Common::Rect mouseRect(mouseX, mouseY, mouseX + mouseWidth, mouseY + mouseHeight);

      if (_mouseDirty) {
            if (!_fullScreenIsDirty) {
                  _dirtyRects.push_back(_lastDrawnMouseRect);
                  _dirtyRects.push_back(mouseRect);
            }
            if (!_fullScreenOverlayIsDirty && _overlayVisible) {
                  _dirtyOverlayRects.push_back(_lastDrawnMouseRect);
                  _dirtyOverlayRects.push_back(mouseRect);
            }
            _mouseDirty = false;
            _lastDrawnMouseRect = mouseRect;
      }

      while (_dirtyRects.size()) {
            Common::Rect dirtyRect = _dirtyRects.remove_at(_dirtyRects.size() - 1);

            //printf("Drawing: (%i, %i) -> (%i, %i)\n", dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom);
            
            drawDirtyRect(dirtyRect);
            
            if (_overlayVisible)
                  drawDirtyOverlayRect(dirtyRect);

            drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
            updateHardwareSurfaceForRect(dirtyRect);        
      }

      if (_overlayVisible) {
            while (_dirtyOverlayRects.size()) {
                  Common::Rect dirtyRect = _dirtyOverlayRects.remove_at(_dirtyOverlayRects.size() - 1);

                  //printf("Drawing: (%i, %i) -> (%i, %i)\n", dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom);
                  
                  drawDirtyOverlayRect(dirtyRect);
                  drawMouseCursorOnRectUpdate(dirtyRect, mouseRect);
                  updateHardwareSurfaceForRect(dirtyRect);
            }
      }
      
      //iPhone_updateScreenRect(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom );
}

void OSystem_IPHONE::drawDirtyRect(const Common::Rect& dirtyRect) {
      int h = dirtyRect.bottom - dirtyRect.top;
      int w = dirtyRect.right - dirtyRect.left;

      switch (_screenOrientation) {
            case kScreenOrientationPortrait: {
                  byte  *src = &_offscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
                  for (int y = h; y > 0; y--) {
                        for (int x = w; x > 0; x--)
                              *dst++ = _palette[*src++];

                        dst += _screenWidth - w;
                        src += _screenWidth - w;
                  }
                  break;
            }
            case kScreenOrientationLandscape: {
                  byte *src = &_offscreen[(dirtyRect.bottom - 1) * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[dirtyRect.left * _screenHeight + (_screenHeight - dirtyRect.bottom)];
                  blitLandscapeScreenRect8bpp(dst, src, w, h, _palette, -_screenWidth, -_screenHeight);
                  break;
            }
            case kScreenOrientationFlippedLandscape: {
                  byte *src = &_offscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[(_screenWidth - dirtyRect.left - 1) * _screenHeight + dirtyRect.top];
                  blitLandscapeScreenRect8bpp(dst, src, w, h, _palette, _screenWidth, _screenHeight);
                  break;
            }
      }     
}

void OSystem_IPHONE::drawDirtyOverlayRect(const Common::Rect& dirtyRect) {
      int h = dirtyRect.bottom - dirtyRect.top;
      int w = dirtyRect.right - dirtyRect.left;

      switch (_screenOrientation) {
            case kScreenOrientationPortrait: {
                  uint16 *src = (uint16 *)&_overlayBuffer[dirtyRect.top * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[dirtyRect.top * _screenWidth + dirtyRect.left];
                  int x = (dirtyRect.right - dirtyRect.left) * 2;
                  for (int y = h; y > 0; y--) {
                        memcpy(dst, src, x);
                        src += _screenWidth;
                        dst += _screenWidth;
                  }
                  break;
            }
            case kScreenOrientationLandscape: {
                  uint16 *src = (uint16 *)&_overlayBuffer[(dirtyRect.bottom - 1) * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[dirtyRect.left * _screenHeight + (_screenHeight - dirtyRect.bottom)];
                  blitLandscapeScreenRect16bpp(dst, src, w, h, -_screenWidth, -_screenHeight);
                  break;
            }
            case kScreenOrientationFlippedLandscape: {
                  uint16 *src = (uint16 *)&_overlayBuffer[dirtyRect.top * _screenWidth + dirtyRect.left];
                  uint16 *dst = &_fullscreen[(_screenWidth - dirtyRect.left - 1) * _screenHeight + dirtyRect.top];
                  blitLandscapeScreenRect16bpp(dst, src, dirtyRect.right - dirtyRect.left, h, _screenWidth, _screenHeight);
                  break;
            }
      }     
}

void OSystem_IPHONE::drawMouseCursorOnRectUpdate(const Common::Rect& updatedRect, const Common::Rect& mouseRect) {
      //draw mouse on top
      if (_mouseVisible && (updatedRect.intersects(mouseRect))) {
            int srcX = 0;
            int srcY = 0;
            int left = _mouseX - _mouseHotspotX;
            if (left < 0) {
                  srcX -= left;
                  left = 0;
            }
            int top = _mouseY - _mouseHotspotY;
            if (top < 0) {
                  srcY -= top;
                  top = 0;
            }
                  //int right = left + _mouseWidth;
            int bottom = top + _mouseHeight;
            if (bottom > _screenWidth)
                  bottom = _screenWidth;
                  int displayWidth = _mouseWidth;
            if (_mouseWidth + left > _screenWidth)
                  displayWidth = _screenWidth - left;
                  int displayHeight = _mouseHeight;
            if (_mouseHeight + top > _screenHeight)
                  displayHeight = _screenHeight - top;
                  switch (_screenOrientation) {
                  case kScreenOrientationPortrait: {
                        byte *src = &_mouseBuf[srcY * _mouseWidth + srcX];
                        uint16 *dst = &_fullscreen[top * _screenWidth + left];
                        for (int y = displayHeight; y > srcY; y--) {
                              for (int x = displayWidth; x > srcX; x--) {
                                    if (*src != _mouseKeyColour)
                                          *dst = _palette[*src];
                                    dst++;
                                    src++;
                              }
                              dst += _screenWidth - displayWidth + srcX;
                              src += _mouseWidth - displayWidth + srcX;
                        }
                        break;
                  }
                  case kScreenOrientationLandscape: {
                        byte *src = &_mouseBuf[(_mouseHeight - 1 - srcY) * _mouseWidth + srcX];
                        uint16 *dst = &_fullscreen[left * _screenHeight + (_screenHeight - bottom + srcY)];
                        for (int x = displayWidth; x > srcX; x--) {
                              for (int y = displayHeight; y > srcY; y--) {
                                    if (*src != _mouseKeyColour)
                                          *dst = _palette[*src];
                                    dst++;
                                    src -= _mouseWidth;
                              }
                              dst -= -_screenHeight + displayHeight - srcY;
                              src += 1 - (displayHeight - srcY) * -_mouseWidth;
                        }
                        break;
                  }
                  case kScreenOrientationFlippedLandscape: {
                        byte *src = &_mouseBuf[srcY * _mouseWidth + srcX];
                        uint16 *dst = &_fullscreen[(_screenWidth - left - 1) * _screenHeight + top];
                        for (int x = displayWidth; x > srcX; x--) {
                              for (int y = displayHeight; y > srcY; y--) {
                                    if (*src != _mouseKeyColour)
                                          *dst = _palette[*src];
                                    dst++;
                                    src += _mouseWidth;
                              }
                              dst -= _screenHeight + displayHeight - srcY;
                              src += 1 - (displayHeight - srcY) * _mouseWidth;
                        }
                        break;
                  }
            }
      }
}

void OSystem_IPHONE::updateHardwareSurfaceForRect(const Common::Rect& updatedRect) {
      uint16 *surface = iPhone_getSurface();
      
      int h = updatedRect.bottom - updatedRect.top;
      int w = updatedRect.right - updatedRect.left;

      if (w == _screenWidth && h == _screenHeight)
            memcpy(surface, _fullscreen, _screenWidth * _screenHeight * 2);
      else {
            switch (_screenOrientation) {
                  case kScreenOrientationPortrait: {
                        int width = w * 2;
                        int offset = updatedRect.top * _screenWidth + updatedRect.left;
                        uint16 *fs = _fullscreen + offset;
                        surface += offset;
                        for (int y = h; y > 0; y--) {
                              memcpy(surface, fs, width);
                              surface += _screenWidth;
                              fs += _screenWidth;
                        }
                        break;
                  }
                  case kScreenOrientationLandscape: {
                        int height = h * 2;
                        int offset = updatedRect.left * _screenHeight + (_screenHeight - updatedRect.bottom);
                        uint16 *fs = _fullscreen + offset;
                        surface += offset;
                        for (int x = w; x > 0; x--) {
                              memcpy(surface, fs, height);
                              surface += _screenHeight;
                              fs += _screenHeight;
                        }
                        break;
                  }
                  case kScreenOrientationFlippedLandscape: {
                        int height = h * 2;
                        int offset = ((_screenWidth - updatedRect.left - 1) * _screenHeight + updatedRect.top);
                        uint16 *fs = _fullscreen + offset;
                        surface += offset;
                        for (int x = w; x > 0; x--) {
                              memcpy(surface, fs, height);
                              surface -= _screenHeight;
                              fs -= _screenHeight;
                        }
                        break;
                  }
            }
      }     
}

Graphics::Surface *OSystem_IPHONE::lockScreen() {
      //printf("lockScreen()\n");

      _framebuffer.pixels = _offscreen;
      _framebuffer.w = _screenWidth;
      _framebuffer.h = _screenHeight;
      _framebuffer.pitch = _screenWidth;
      _framebuffer.bytesPerPixel = 1;

      return &_framebuffer;
}

void OSystem_IPHONE::unlockScreen() {
      //printf("unlockScreen()\n");
      dirtyFullScreen();
}

void OSystem_IPHONE::setShakePos(int shakeOffset) {
      //printf("setShakePos(%i)\n", shakeOffset);
}

void OSystem_IPHONE::showOverlay() {
      //printf("showOverlay()\n");
      _overlayVisible = true;
      dirtyFullOverlayScreen();
}

void OSystem_IPHONE::hideOverlay() {
      //printf("hideOverlay()\n");
      _overlayVisible = false;
      _dirtyOverlayRects.clear();
      dirtyFullScreen();
}

void OSystem_IPHONE::clearOverlay() {
      //printf("clearOverlay()\n");
      bzero(_overlayBuffer, _screenWidth * _screenHeight * sizeof(OverlayColor));
      dirtyFullOverlayScreen();
}

void OSystem_IPHONE::grabOverlay(OverlayColor *buf, int pitch) {
      //printf("grabOverlay()\n");
      int h = _screenHeight;
      OverlayColor *src = _overlayBuffer;

      do {
            memcpy(buf, src, _screenWidth * sizeof(OverlayColor));
            src += _screenWidth;
            buf += pitch;
      } while (--h);
}

void OSystem_IPHONE::copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h) {
      //printf("copyRectToOverlay(buf, pitch=%i, x=%i, y=%i, w=%i, h=%i)\n", pitch, x, y, w, h);

      //Clip the coordinates
      if (x < 0) {
            w += x;
            buf -= x;
            x = 0;
      }

      if (y < 0) {
            h += y;
            buf -= y * pitch;
            y = 0;
      }

      if (w > _screenWidth - x)
            w = _screenWidth - x;

      if (h > _screenHeight - y)
            h = _screenHeight - y;

      if (w <= 0 || h <= 0)
            return;

      if (!_fullScreenOverlayIsDirty) {
            _dirtyOverlayRects.push_back(Common::Rect(x, y, x + w, y + h));
      }

      OverlayColor *dst = _overlayBuffer + (y * _screenWidth + x);
      if (_screenWidth == pitch && pitch == w)
            memcpy(dst, buf, h * w * sizeof(OverlayColor));
      else {
            do {
                  memcpy(dst, buf, w * sizeof(OverlayColor));
                  buf += pitch;
                  dst += _screenWidth;
            } while (--h);
      }
}

int16 OSystem_IPHONE::getOverlayHeight() {
      return _screenHeight;
}

int16 OSystem_IPHONE::getOverlayWidth() {
      return _screenWidth;
}

bool OSystem_IPHONE::showMouse(bool visible) {
      bool last = _mouseVisible;
      _mouseVisible = visible;
      _mouseDirty = true;

      return last;
}

void OSystem_IPHONE::warpMouse(int x, int y) {
      //printf("warpMouse()\n");

      _mouseX = x;
      _mouseY = y;
      _mouseDirty = true;
}

void OSystem_IPHONE::dirtyFullScreen() {
      if (!_fullScreenIsDirty) {
            _dirtyRects.clear();
            _dirtyRects.push_back(Common::Rect(0, 0, _screenWidth, _screenHeight));
            _fullScreenIsDirty = true;
      }
}

void OSystem_IPHONE::dirtyFullOverlayScreen() {
      if (!_fullScreenOverlayIsDirty) {
            _dirtyOverlayRects.clear();
            _dirtyOverlayRects.push_back(Common::Rect(0, 0, _screenWidth, _screenHeight));
            _fullScreenOverlayIsDirty = true;
      }
}

void OSystem_IPHONE::setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor, int cursorTargetScale) {
      //printf("setMouseCursor(%i, %i)\n", hotspotX, hotspotY);

      if (_mouseBuf != NULL && (_mouseWidth != w || _mouseHeight != h)) {
            free(_mouseBuf);
            _mouseBuf = NULL;
      }

      if (_mouseBuf == NULL)
            _mouseBuf = (byte *)malloc(w * h);

      _mouseWidth = w;
      _mouseHeight = h;

      _mouseHotspotX = hotspotX;
      _mouseHotspotY = hotspotY;

      _mouseKeyColour = keycolor;

      memcpy(_mouseBuf, buf, w * h);

      _mouseDirty = true;
}

bool OSystem_IPHONE::pollEvent(Common::Event &event) {
      //printf("pollEvent()\n");

      long curTime = getMillis();

      if (_timerCallback && (curTime >= _timerCallbackNext)) {
            _timerCallback(_timerCallbackTimer);
            _timerCallbackNext = curTime + _timerCallbackTimer;
      }

      if (_needEventRestPeriod) {
            // Workaround: Some engines can't handle mouse-down and mouse-up events
            // appearing right after each other, without a call returning no input in between.
            _needEventRestPeriod = false;
            return false;
      }

      if (_queuedInputEvent.type != (Common::EventType)0) {
            event = _queuedInputEvent;
            _queuedInputEvent.type = (Common::EventType)0;
            return true;
      }

      int eventType;
      float xUnit, yUnit;

      if (iPhone_fetchEvent(&eventType, &xUnit, &yUnit)) {
            int x = 0;
            int y = 0;
            switch (_screenOrientation) {
                  case kScreenOrientationPortrait:
                        x = (int)(xUnit * _screenWidth);
                        y = (int)(yUnit * _screenHeight);
                        break;
                  case kScreenOrientationLandscape:
                        x = (int)(yUnit * _screenWidth);
                        y = (int)((1.0 - xUnit) * _screenHeight);
                        break;
                  case kScreenOrientationFlippedLandscape:
                        x = (int)((1.0 - yUnit) * _screenWidth);
                        y = (int)(xUnit * _screenHeight);
                        break;
            }

            switch ((InputEvent)eventType) {
                  case kInputMouseDown:
                        if (!handleEvent_mouseDown(event, x, y))
                              return false;
                        break;

                  case kInputMouseUp:
                  if (!handleEvent_mouseUp(event, x, y))
                        return false;
                        break;

                  case kInputMouseDragged:
                        if (!handleEvent_mouseDragged(event, x, y))
                              return false;
                        break;

                  case kInputMouseSecondToggled:
                        _secondaryTapped = !_secondaryTapped;
                        //printf("Mouse second at (%u, %u). State now %s.\n", x, y, _secondaryTapped ? "on" : "off");
                        if (_secondaryTapped) {
                              if (!handleEvent_secondMouseDown(event, x, y))
                                    return false;
                        } else {
                              if (!handleEvent_secondMouseUp(event, x, y))
                                    return false;
                        }
                        break;

                  case kInputOrientationChanged:
                        handleEvent_orientationChanged((int)xUnit);
                        return false;
                        break;

                  case kInputApplicationSuspended:
                        suspendLoop();
                        return false;
                        break;

                  case kInputKeyPressed:
                        handleEvent_keyPressed(event, (int)xUnit);
                        break;

                  case kInputSwipe:
                        if (!handleEvent_swipe(event, (int)xUnit))
                              return false;
                        break;

                  default:
                        break;
            }

            return true;
      }
      return false;
}

bool OSystem_IPHONE::handleEvent_mouseDown(Common::Event &event, int x, int y) {
      //printf("Mouse down at (%u, %u)\n", x, y);

      // Workaround: kInputMouseSecondToggled isn't always sent when the
      // secondary finger is lifted. Need to make sure we get out of that mode.
      _secondaryTapped = false;

      if (_touchpadModeEnabled) {
            _lastPadX = x;
            _lastPadY = y;
      } else
            warpMouse(x, y);

      if (_mouseClickAndDragEnabled) {
            event.type = Common::EVENT_LBUTTONDOWN;
            event.mouse.x = _mouseX;
            event.mouse.y = _mouseY;
            return true;
      } else {
            _lastMouseDown = getMillis();
      }
      return false;
}

bool OSystem_IPHONE::handleEvent_mouseUp(Common::Event &event, int x, int y) {
      //printf("Mouse up at (%u, %u)\n", x, y);

      if (_secondaryTapped) {
            _secondaryTapped = false;
            if (!handleEvent_secondMouseUp(event, x, y))
                  return false;
      }
      else if (_mouseClickAndDragEnabled) {
            event.type = Common::EVENT_LBUTTONUP;
            event.mouse.x = _mouseX;
            event.mouse.y = _mouseY;
      } else {
            if (getMillis() - _lastMouseDown < 250) {
                  event.type = Common::EVENT_LBUTTONDOWN;
                  event.mouse.x = _mouseX;
                  event.mouse.y = _mouseY;

                  _queuedInputEvent.type = Common::EVENT_LBUTTONUP;
                  _queuedInputEvent.mouse.x = _mouseX;
                  _queuedInputEvent.mouse.y = _mouseY;
                  _lastMouseTap = getMillis();
                  _needEventRestPeriod = true;
            } else
                  return false;
      }

      return true;
}

bool OSystem_IPHONE::handleEvent_secondMouseDown(Common::Event &event, int x, int y) {
      _lastSecondaryDown = getMillis();
      _gestureStartX = x;
      _gestureStartY = y;

      if (_mouseClickAndDragEnabled) {
            event.type = Common::EVENT_LBUTTONUP;
            event.mouse.x = _mouseX;
            event.mouse.y = _mouseY;

            _queuedInputEvent.type = Common::EVENT_RBUTTONDOWN;
            _queuedInputEvent.mouse.x = _mouseX;
            _queuedInputEvent.mouse.y = _mouseY;
      }
      else
            return false;

      return true;
}

bool OSystem_IPHONE::handleEvent_secondMouseUp(Common::Event &event, int x, int y) {
      int curTime = getMillis();

      if (curTime - _lastSecondaryDown < 400 ) {
            //printf("Right tap!\n");
            if (curTime - _lastSecondaryTap < 400 && !_overlayVisible) {
                  //printf("Right escape!\n");
                  event.type = Common::EVENT_KEYDOWN;
                  _queuedInputEvent.type = Common::EVENT_KEYUP;

                  event.kbd.flags = _queuedInputEvent.kbd.flags = 0;
                  event.kbd.keycode = _queuedInputEvent.kbd.keycode = Common::KEYCODE_ESCAPE;
                  event.kbd.ascii = _queuedInputEvent.kbd.ascii = Common::ASCII_ESCAPE;
                  _needEventRestPeriod = true;
                  _lastSecondaryTap = 0;
            } else if (!_mouseClickAndDragEnabled) {
                  //printf("Rightclick!\n");
                  event.type = Common::EVENT_RBUTTONDOWN;
                  event.mouse.x = _mouseX;
                  event.mouse.y = _mouseY;
                  _queuedInputEvent.type = Common::EVENT_RBUTTONUP;
                  _queuedInputEvent.mouse.x = _mouseX;
                  _queuedInputEvent.mouse.y = _mouseY;
                  _lastSecondaryTap = curTime;
                  _needEventRestPeriod = true;
            } else {
                  //printf("Right nothing!\n");
                  return false;
            }
      }
      if (_mouseClickAndDragEnabled) {
            event.type = Common::EVENT_RBUTTONUP;
            event.mouse.x = _mouseX;
            event.mouse.y = _mouseY;
      }

      return true;
}

bool OSystem_IPHONE::handleEvent_mouseDragged(Common::Event &event, int x, int y) {
      if (_lastDragPosX == x && _lastDragPosY == y)
            return false;

      _lastDragPosX = x;
      _lastDragPosY = y;

      //printf("Mouse dragged at (%u, %u)\n", x, y);
      if (_secondaryTapped) {
             if (_gestureStartX == -1 || _gestureStartY == -1) {
                  return false;
             }

            int vecX = (x - _gestureStartX);
            int vecY = (y - _gestureStartY);
            int lengthSq =  vecX * vecX + vecY * vecY;
            //printf("Lengthsq: %u\n", lengthSq);

            if (lengthSq > 15000) { // Long enough gesture to react upon.
                  _gestureStartX = -1;
                  _gestureStartY = -1;

                  float vecLength = sqrt(lengthSq);
                  float vecXNorm = vecX / vecLength;
                  float vecYNorm = vecY / vecLength;

                  //printf("Swipe vector: (%.2f, %.2f)\n", vecXNorm, vecYNorm);

                  if (vecXNorm > -0.50 && vecXNorm < 0.50 && vecYNorm > 0.75) {
                        // Swipe down
                        event.type = Common::EVENT_KEYDOWN;
                        _queuedInputEvent.type = Common::EVENT_KEYUP;

                        event.kbd.flags = _queuedInputEvent.kbd.flags = 0;
                        event.kbd.keycode = _queuedInputEvent.kbd.keycode = Common::KEYCODE_F5;
                        event.kbd.ascii = _queuedInputEvent.kbd.ascii = Common::ASCII_F5;
                        _needEventRestPeriod = true;
                  } else if (vecXNorm > -0.50 && vecXNorm < 0.50 && vecYNorm < -0.75) {
                        // Swipe up
                        _mouseClickAndDragEnabled = !_mouseClickAndDragEnabled;
                        const char *dialogMsg;
                        if (_mouseClickAndDragEnabled) {
                              _touchpadModeEnabled = false;
                              dialogMsg = "Mouse-click-and-drag mode enabled.";
                        } else
                              dialogMsg = "Mouse-click-and-drag mode disabled.";
                        GUI::TimedMessageDialog dialog(dialogMsg, 1500);
                        dialog.runModal();
                        return false;

                  } else if (vecXNorm > 0.75 && vecYNorm >  -0.5 && vecYNorm < 0.5) {
                        // Swipe right
                        _touchpadModeEnabled = !_touchpadModeEnabled;
                        const char *dialogMsg;
                        if (_touchpadModeEnabled)
                              dialogMsg = "Touchpad mode enabled.";
                        else
                              dialogMsg = "Touchpad mode disabled.";
                        GUI::TimedMessageDialog dialog(dialogMsg, 1500);
                        dialog.runModal();
                        return false;

                  } else if (vecXNorm < -0.75 && vecYNorm >  -0.5 && vecYNorm < 0.5) {
                        // Swipe left
                        return false;
                  } else
                        return false;
            } else
                  return false;
      } else {
            int mouseNewPosX;
            int mouseNewPosY;
            if (_touchpadModeEnabled ) {
                  int deltaX = _lastPadX - x;
                  int deltaY = _lastPadY - y;
                  _lastPadX = x;
                  _lastPadY = y;

                  mouseNewPosX = (int)(_mouseX - deltaX / 0.5f);
                  mouseNewPosY = (int)(_mouseY - deltaY / 0.5f);

                  if (mouseNewPosX < 0)
                        mouseNewPosX = 0;
                  else if (mouseNewPosX > _screenWidth)
                        mouseNewPosX = _screenWidth;

                  if (mouseNewPosY < 0)
                        mouseNewPosY = 0;
                  else if (mouseNewPosY > _screenHeight)
                        mouseNewPosY = _screenHeight;

            } else {
                  mouseNewPosX = x;
                  mouseNewPosY = y;
            }

            event.type = Common::EVENT_MOUSEMOVE;
            event.mouse.x = mouseNewPosX;
            event.mouse.y = mouseNewPosY;
            warpMouse(mouseNewPosX, mouseNewPosY);
      }

      return true;
}

void  OSystem_IPHONE::handleEvent_orientationChanged(int orientation) {
      //printf("Orientation: %i\n", orientation);

      ScreenOrientation newOrientation;
      switch (orientation) {
            case 1:
                  newOrientation = kScreenOrientationPortrait;
                  break;
            case 3:
                  newOrientation = kScreenOrientationLandscape;
                  break;
            case 4:
                  newOrientation = kScreenOrientationFlippedLandscape;
                  break;
            default:
                  return;
      }


      if (_screenOrientation != newOrientation) {
            _screenOrientation = newOrientation;
            if (_screenOrientation != kScreenOrientationPortrait)
                  iPhone_initSurface(_screenHeight, _screenWidth, true);
            else
                  iPhone_initSurface(_screenWidth, _screenHeight, false);

            dirtyFullScreen();
            if (_overlayVisible)
                  dirtyFullOverlayScreen();
            updateScreen();
      }
}

void  OSystem_IPHONE::handleEvent_keyPressed(Common::Event &event, int keyPressed) {
      int ascii = keyPressed;
      //printf("key: %i\n", keyPressed);

      // We remap some of the iPhone keyboard keys.
      // The first ten here are the row of symbols below the numeric keys.
      switch (keyPressed) {
            case 45:
                  keyPressed = Common::KEYCODE_F1;
                  ascii = Common::ASCII_F1;
                  break;
            case 47:
                  keyPressed = Common::KEYCODE_F2;
                  ascii = Common::ASCII_F2;
                  break;
            case 58:
                  keyPressed = Common::KEYCODE_F3;
                  ascii = Common::ASCII_F3;
                  break;
            case 59:
                  keyPressed = Common::KEYCODE_F4;
                  ascii = Common::ASCII_F4;
                  break;
            case 40:
                  keyPressed = Common::KEYCODE_F5;
                  ascii = Common::ASCII_F5;
                  break;
            case 41:
                  keyPressed = Common::KEYCODE_F6;
                  ascii = Common::ASCII_F6;
                  break;
            case 36:
                  keyPressed = Common::KEYCODE_F7;
                  ascii = Common::ASCII_F7;
                  break;
            case 38:
                  keyPressed = Common::KEYCODE_F8;
                  ascii = Common::ASCII_F8;
                  break;
            case 64:
                  keyPressed = Common::KEYCODE_F9;
                  ascii = Common::ASCII_F9;
                  break;
            case 34:
                  keyPressed = Common::KEYCODE_F10;
                  ascii = Common::ASCII_F10;
                  break;
            case 10:
                  keyPressed = Common::KEYCODE_RETURN;
                  ascii = Common::ASCII_RETURN;
                  break;
      }
      event.type = Common::EVENT_KEYDOWN;
      _queuedInputEvent.type = Common::EVENT_KEYUP;

      event.kbd.flags = _queuedInputEvent.kbd.flags = 0;
      event.kbd.keycode = _queuedInputEvent.kbd.keycode = (Common::KeyCode)keyPressed;
      event.kbd.ascii = _queuedInputEvent.kbd.ascii = ascii;
      _needEventRestPeriod = true;
}

bool OSystem_IPHONE::handleEvent_swipe(Common::Event &event, int direction) {
      Common::KeyCode keycode = Common::KEYCODE_INVALID;
      switch (_screenOrientation) {
            case kScreenOrientationPortrait:
                  switch ((UIViewSwipeDirection)direction) {
                        case kUIViewSwipeUp:
                              keycode = Common::KEYCODE_UP;
                              break;
                        case kUIViewSwipeDown:
                              keycode = Common::KEYCODE_DOWN;
                              break;
                        case kUIViewSwipeLeft:
                              keycode = Common::KEYCODE_LEFT;
                              break;
                        case kUIViewSwipeRight:
                              keycode = Common::KEYCODE_RIGHT;
                              break;
                        default:
                              return false;
                  }
                  break;
            case kScreenOrientationLandscape:
                  switch ((UIViewSwipeDirection)direction) {
                        case kUIViewSwipeUp:
                              keycode = Common::KEYCODE_LEFT;
                              break;
                        case kUIViewSwipeDown:
                              keycode = Common::KEYCODE_RIGHT;
                              break;
                        case kUIViewSwipeLeft:
                              keycode = Common::KEYCODE_DOWN;
                              break;
                        case kUIViewSwipeRight:
                              keycode = Common::KEYCODE_UP;
                              break;
                        default:
                              return false;
                  }
                  break;
            case kScreenOrientationFlippedLandscape:
                  switch ((UIViewSwipeDirection)direction) {
                        case kUIViewSwipeUp:
                              keycode = Common::KEYCODE_RIGHT;
                              break;
                        case kUIViewSwipeDown:
                              keycode = Common::KEYCODE_LEFT;
                              break;
                        case kUIViewSwipeLeft:
                              keycode = Common::KEYCODE_UP;
                              break;
                        case kUIViewSwipeRight:
                              keycode = Common::KEYCODE_DOWN;
                              break;
                        default:
                              return false;
                  }
                  break;
      }

      event.kbd.keycode = _queuedInputEvent.kbd.keycode = keycode;
      event.kbd.ascii = _queuedInputEvent.kbd.ascii = 0;
      event.type = Common::EVENT_KEYDOWN;
      _queuedInputEvent.type = Common::EVENT_KEYUP;
      event.kbd.flags = _queuedInputEvent.kbd.flags = 0;
      _needEventRestPeriod = true;

      return true;
}

void OSystem_IPHONE::suspendLoop() {
      bool done = false;
      int eventType;
      float xUnit, yUnit;
      uint32 startTime = getMillis();

      stopSoundsystem();

      while (!done) {
            if (iPhone_fetchEvent(&eventType, &xUnit, &yUnit))
                  if ((InputEvent)eventType == kInputApplicationResumed)
                        done = true;
            usleep(100000);
      }

      startSoundsystem();

      _timeSuspended += getMillis() - startTime;
}

uint32 OSystem_IPHONE::getMillis() {
      //printf("getMillis()\n");

      struct timeval currentTime;
      gettimeofday(&currentTime, NULL);
      return (uint32)(((currentTime.tv_sec - _startTime.tv_sec) * 1000) +
                      ((currentTime.tv_usec - _startTime.tv_usec) / 1000)) - _timeSuspended;
}

void OSystem_IPHONE::delayMillis(uint msecs) {
      //printf("delayMillis(%d)\n", msecs);
      usleep(msecs * 1000);
}

OSystem::MutexRef OSystem_IPHONE::createMutex(void) {
      pthread_mutexattr_t attr;
      pthread_mutexattr_init(&attr);
      pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);

      pthread_mutex_t *mutex = (pthread_mutex_t *) malloc(sizeof(pthread_mutex_t));
      if (pthread_mutex_init(mutex, &attr) != 0) {
            printf("pthread_mutex_init() failed!\n");
            free(mutex);
            return NULL;
      }

      return (MutexRef)mutex;
}

void OSystem_IPHONE::lockMutex(MutexRef mutex) {
      if (pthread_mutex_lock((pthread_mutex_t *) mutex) != 0) {
            printf("pthread_mutex_lock() failed!\n");
      }
}

void OSystem_IPHONE::unlockMutex(MutexRef mutex) {
      if (pthread_mutex_unlock((pthread_mutex_t *) mutex) != 0) {
            printf("pthread_mutex_unlock() failed!\n");
      }
}

void OSystem_IPHONE::deleteMutex(MutexRef mutex) {
      if (pthread_mutex_destroy((pthread_mutex_t *) mutex) != 0) {
            printf("pthread_mutex_destroy() failed!\n");
      } else {
            free(mutex);
      }
}

void OSystem_IPHONE::AQBufferCallback(void *in, AudioQueueRef inQ, AudioQueueBufferRef outQB) {
      //printf("AQBufferCallback()\n");
      if (s_AudioQueue.frameCount > 0 && s_soundCallback != NULL) {
            outQB->mAudioDataByteSize = 4 * s_AudioQueue.frameCount;
            s_soundCallback(s_soundParam, (byte *)outQB->mAudioData, outQB->mAudioDataByteSize);
            AudioQueueEnqueueBuffer(inQ, outQB, 0, NULL);
      } else
            AudioQueueStop(s_AudioQueue.queue, false);
}

void OSystem_IPHONE::mixCallback(void *sys, byte *samples, int len) {
      OSystem_IPHONE *this_ = (OSystem_IPHONE *)sys;
      assert(this_);

      if (this_->_mixer)
            this_->_mixer->mixCallback(samples, len);
}

void OSystem_IPHONE::setupMixer() {
      //printf("setSoundCallback()\n");
      _mixer = new Audio::MixerImpl(this);

      s_soundCallback = mixCallback;
      s_soundParam = this;

      startSoundsystem();
}

void OSystem_IPHONE::startSoundsystem() {
      s_AudioQueue.dataFormat.mSampleRate = AUDIO_SAMPLE_RATE;
      s_AudioQueue.dataFormat.mFormatID = kAudioFormatLinearPCM;
      s_AudioQueue.dataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
      s_AudioQueue.dataFormat.mBytesPerPacket = 4;
      s_AudioQueue.dataFormat.mFramesPerPacket = 1;
      s_AudioQueue.dataFormat.mBytesPerFrame = 4;
      s_AudioQueue.dataFormat.mChannelsPerFrame = 2;
      s_AudioQueue.dataFormat.mBitsPerChannel = 16;
      s_AudioQueue.frameCount = WAVE_BUFFER_SIZE;

      if (AudioQueueNewOutput(&s_AudioQueue.dataFormat, AQBufferCallback, &s_AudioQueue, 0, kCFRunLoopCommonModes, 0, &s_AudioQueue.queue)) {
            printf("Couldn't set the AudioQueue callback!\n");
            _mixer->setReady(false);
            return;
      }

      uint32 bufferBytes = s_AudioQueue.frameCount * s_AudioQueue.dataFormat.mBytesPerFrame;

      for (int i = 0; i < AUDIO_BUFFERS; i++) {
            if (AudioQueueAllocateBuffer(s_AudioQueue.queue, bufferBytes, &s_AudioQueue.buffers[i])) {
                  printf("Error allocating AudioQueue buffer!\n");
                  _mixer->setReady(false);
                  return;
            }

            AQBufferCallback(&s_AudioQueue, s_AudioQueue.queue, s_AudioQueue.buffers[i]);
      }

      AudioQueueSetParameter(s_AudioQueue.queue, kAudioQueueParam_Volume, 1.0);
      if (AudioQueueStart(s_AudioQueue.queue, NULL)) {
            printf("Error starting the AudioQueue!\n");
            _mixer->setReady(false);
            return;
      }

      _mixer->setOutputRate(AUDIO_SAMPLE_RATE);
      _mixer->setReady(true);
}

void OSystem_IPHONE::stopSoundsystem() {
      AudioQueueStop(s_AudioQueue.queue, true);

      for (int i = 0; i < AUDIO_BUFFERS; i++) {
            AudioQueueFreeBuffer(s_AudioQueue.queue, s_AudioQueue.buffers[i]);
      }

      AudioQueueDispose(s_AudioQueue.queue, true);
      _mixer->setReady(false);
}

int OSystem_IPHONE::getOutputSampleRate() const {
      return AUDIO_SAMPLE_RATE;
}

void OSystem_IPHONE::setTimerCallback(TimerProc callback, int interval) {
      //printf("setTimerCallback()\n");

      if (callback != NULL) {
            _timerCallbackTimer = interval;
            _timerCallbackNext = getMillis() + interval;
            _timerCallback = callback;
      } else
            _timerCallback = NULL;
}

void OSystem_IPHONE::quit() {
}

void OSystem_IPHONE::getTimeAndDate(struct tm &t) const {
      time_t curTime = time(0);
      t = *localtime(&curTime);
}

void OSystem_IPHONE::setWindowCaption(const char *caption) {
}

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

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

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

OSystem *OSystem_IPHONE_create() {
      return new OSystem_IPHONE();
}

Common::SeekableReadStream *OSystem_IPHONE::openConfigFileForReading() {
      Common::FSNode file(SCUMMVM_PREFS_PATH);
      return file.openForReading();
}

Common::WriteStream *OSystem_IPHONE::openConfigFileForWriting() {
      Common::FSNode file(SCUMMVM_PREFS_PATH);
      return file.openForWriting();
}

void OSystem_IPHONE::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
      // Get URL of the Resource directory of the .app bundle
      CFURLRef fileUrl = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
      if (fileUrl) {
            // Try to convert the URL to an absolute path
            UInt8 buf[MAXPATHLEN];
            if (CFURLGetFileSystemRepresentation(fileUrl, true, buf, sizeof(buf))) {
                  // Success: Add it to the search path
                  Common::String bundlePath((const char *)buf);
                  s.add("__OSX_BUNDLE__", new Common::FSDirectory(bundlePath), priority);
            }
            CFRelease(fileUrl);
      }
}

void iphone_main(int argc, char *argv[]) {

      //OSystem_IPHONE::migrateApp();

      FILE *newfp = fopen("/var/mobile/.scummvm.log", "a");
      if (newfp != NULL) {
            fclose(stdout);
            fclose(stderr);
            *stdout = *newfp;
            *stderr = *newfp;
            setbuf(stdout, NULL);
            setbuf(stderr, NULL);

            //extern int gDebugLevel;
            //gDebugLevel = 10;
      }

      system("mkdir " SCUMMVM_ROOT_PATH);
      system("mkdir " SCUMMVM_SAVE_PATH);

      chdir("/var/mobile/");

      g_system = OSystem_IPHONE_create();
      assert(g_system);

      // Invoke the actual ScummVM main entry point:
      scummvm_main(argc, argv);
      g_system->quit();       // TODO: Consider removing / replacing this!
}

#endif


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