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/* 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
 * 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.
 * $URL$
 * $Id$


#include "common/system.h"
#include "common/timer.h"
#include "common/savefile.h"

class GraphicsManager;
class MutexManager;

 * Base class for modular backends.
 * It wraps most functions to their manager equivalent, but not
 * all OSystem functions are implemented here.
 * A backend derivated from this class, will need to implement
 * these functions on its own:
 *   OSystem::pollEvent()
 *   OSystem::createConfigReadStream()
 *   OSystem::createConfigWriteStream()
 *   OSystem::getMillis()
 *   OSystem::delayMillis()
 *   OSystem::getTimeAndDate()
 * And, it should also initialize all the managers variables
 * declared in this class, or override their related functions.
00054 class ModularBackend : public OSystem {
      virtual ~ModularBackend();

      /** @name Features */

      virtual bool hasFeature(Feature f);
      virtual void setFeatureState(Feature f, bool enable);
      virtual bool getFeatureState(Feature f);


      /** @name Graphics */

      virtual GraphicsManager *getGraphicsManager();
      virtual const GraphicsMode *getSupportedGraphicsModes() const;
      virtual int getDefaultGraphicsMode() const;
      virtual bool setGraphicsMode(int mode);
      virtual int getGraphicsMode() const;
      virtual void resetGraphicsScale();
      virtual Graphics::PixelFormat getScreenFormat() const;
      virtual Common::List<Graphics::PixelFormat> getSupportedFormats() const;
      virtual void initSize(uint width, uint height, const Graphics::PixelFormat *format = NULL);
      virtual int getScreenChangeID() const;

      virtual void beginGFXTransaction();
      virtual OSystem::TransactionError endGFXTransaction();

      virtual int16 getHeight();
      virtual int16 getWidth();
      virtual PaletteManager *getPaletteManager();
      virtual void copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h);
      virtual Graphics::Surface *lockScreen();
      virtual void unlockScreen();
      virtual void fillScreen(uint32 col);
      virtual void updateScreen();
      virtual void setShakePos(int shakeOffset);
      virtual void setFocusRectangle(const Common::Rect& rect);
      virtual void clearFocusRectangle();

      virtual void showOverlay();
      virtual void hideOverlay();
      virtual Graphics::PixelFormat getOverlayFormat() const;
      virtual void clearOverlay();
      virtual void grabOverlay(OverlayColor *buf, int pitch);
      virtual void copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h);
      virtual int16 getOverlayHeight();
      virtual int16 getOverlayWidth();

      virtual bool showMouse(bool visible);
      virtual void warpMouse(int x, int y);
      virtual void setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor, int cursorTargetScale = 1, const Graphics::PixelFormat *format = NULL);
      virtual void setCursorPalette(const byte *colors, uint start, uint num);
      virtual void disableCursorPalette(bool disable);


      /** @name Events and Time */
      virtual Common::TimerManager *getTimerManager();
      virtual Common::EventManager *getEventManager();
00121       virtual Common::HardwareKeySet *getHardwareKeySet() { return 0; }

      /** @name Mutex handling */

      virtual MutexRef createMutex();
      virtual void lockMutex(MutexRef mutex);
      virtual void unlockMutex(MutexRef mutex);
      virtual void deleteMutex(MutexRef mutex);


      /** @name Sound */

      virtual Audio::Mixer *getMixer();


      /** @name Audio CD */

      virtual AudioCDManager *getAudioCDManager();


      /** @name Miscellaneous */

      virtual Common::SaveFileManager *getSavefileManager();
      virtual FilesystemFactory *getFilesystemFactory();
00154       virtual void quit() { exit(0); }
00155       virtual void setWindowCaption(const char *caption) {}
      virtual void displayMessageOnOSD(const char *msg);


      /** @name Managers variables */

      FilesystemFactory *_fsFactory;
      Common::EventManager *_eventManager;
      Common::SaveFileManager *_savefileManager;
      Common::TimerManager *_timerManager;
      MutexManager *_mutexManager;
      GraphicsManager *_graphicsManager;
      Audio::Mixer *_mixer;
      AudioCDManager *_audiocdManager;



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