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/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2006 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
 * 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://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/backends/x11/x11.h $
 * $Id: x11.h 22505 2006-05-17 23:52:45Z sev $

class OSystem_X11:public OSystem {

      void initBackend();

      // Determine whether the backend supports the specified feature.
      bool hasFeature(Feature f);

      // En-/disable the specified feature.
      void setFeatureState(Feature f, bool enable);

      // Query the state of the specified feature.
      bool getFeatureState(Feature f);

      // Retrieve a list of all graphics modes supported by this backend.
      const GraphicsMode *getSupportedGraphicsModes() const;

      // Return the ID of the 'default' graphics mode.
      int getDefaultGraphicsMode() const;

      // Switch to the specified graphics mode.
      bool setGraphicsMode(int mode);

      // Determine which graphics mode is currently active.
      int getGraphicsMode() const;

      // Set colors of the palette
      void setPalette(const byte *colors, uint start, uint num);

      // Set the size of the video bitmap.
      // Typically, 320x200
      void initSize(uint w, uint h);

      // Draw a bitmap to screen.
      // The screen will not be updated to reflect the new bitmap
      void copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h);

      // Update the dirty areas of the screen
      void updateScreen();

      // Either show or hide the mouse cursor
      bool showMouse(bool visible);

      // Set the position of the mouse cursor
      void set_mouse_pos(int x, int y);

      // Warp the mouse cursor. Where set_mouse_pos() only informs the
      // backend of the mouse cursor's current position, this function
      // actually moves the cursor to the specified position.
      void warpMouse(int x, int y);

      // Set the bitmap that's used when drawing the cursor.
      void setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor = 255, int cursorTargetScale = 1);

      // Shaking is used in SCUMM. Set current shake position.
      void setShakePos(int shake_pos);

      // Get the number of milliseconds since the program was started.
      uint32 getMillis();

      // Delay for a specified amount of milliseconds
      void delayMillis(uint msecs);

      // Get the next event.
      // Returns true if an event was retrieved.
      bool pollEvent(Event &event);

      // Set function that generates samples
      bool setSoundCallback(SoundProc proc, void *param);
      void clearSoundCallback();

      // Determine the output sample rate. Audio data provided by the sound
      // callback will be played using this rate.
      int getOutputSampleRate() const;

      // Quit
      void quit();

      // Add a callback timer
      void setTimerCallback(TimerProc callback, int interval);

      // Mutex handling
      MutexRef createMutex();
      void lockMutex(MutexRef mutex);
      void unlockMutex(MutexRef mutex);
      void deleteMutex(MutexRef mutex);

      // Overlay handling for the new menu system
      void showOverlay();
      void hideOverlay();
      void clearOverlay();
      void grabOverlay(int16 *, int);
      void copyRectToOverlay(const int16 *, int, int, int, int, int);
      virtual int16 getHeight();
      virtual int16 getWidth();

      virtual void grabPalette(byte *colors, uint start, uint num);

      // Set a window caption or any other comparable status display to the
      // given value.
      void setWindowCaption(const char *caption);

      static OSystem *create(int gfx_mode, bool full_screen);

      typedef struct {
            int x, y;
            int w, h;
            int hot_x, hot_y;
      } MouseState;

      typedef struct {
            int x, y, w, h;
      } DirtyRect;

      enum {
            MAX_NUMBER_OF_DIRTY_RECTS = 32

      void create_empty_cursor();
      void draw_mouse(DirtyRect *dout);
      void undraw_mouse();
      void updateScreen_helper(const DirtyRect *d, DirtyRect *dout);
      void blit_convert(const DirtyRect *d, uint8 *dst, int pitch);
      void blit(const DirtyRect *d, uint16 *dst, int pitch);

      uint8 *_local_fb;
      uint16 *_local_fb_overlay;
      bool _overlay_visible;

      int _window_width, _window_height;
      int _fb_width, _fb_height;
      int _scumm_x, _scumm_y;

      uint16 *_palette16;
      uint32 *_palette32;

      bool _palette_changed;
      Display *_display;
      int _screen, _depth;
      uint8 _bytesPerPixel;
      Window _window;
      GC _black_gc;
      XImage *_image;
      pthread_t _sound_thread;

      struct timeval _start_time;

      int _fake_right_mouse;
      int _report_presses;
      int _current_shake_pos;
      int _new_shake_pos;
      DirtyRect _ds[MAX_NUMBER_OF_DIRTY_RECTS];
      int _num_of_dirty_rects;

      MouseState _oldMouseState, _curMouseState;
      byte *_ms_buf;
      bool _mouse_visible;
      bool _mouse_state_changed;
      byte _mouseKeycolor;

      uint32 _timer_duration, _timer_next_expiry;
      bool _timer_active;
      int (*_timer_callback) (int);

typedef struct {
      OSystem::SoundProc sound_proc;
      void *param;

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