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/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2006 The ScummVM project
 * Copyright (C) 2002-2006 Chris Apers - PalmOS Backend
 * 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/platform/PalmOS/Src/be_base.h $
 * $Id: be_base.h 24417 2006-10-21 18:36:35Z chrilith $

#ifndef BE_BASE_H
#define BE_BASE_H

#include "common/stdafx.h"
#include "common/scummsys.h"
#include "common/system.h"

enum {
      GFX_NORMAL = 0,

// OSD key state
enum {
      kModifierNone = 0,

// OSD resource id
#define kDrawKeyState   3000
#define kDrawNumPad           3010
#define kDrawBatLow           3020
#define kDrawFight            3030

#define computeMsecs(x) ((SysTicksPerSecond() * x) / 1000)

typedef struct {
      UInt32 duration, nextExpiry;
      Boolean active;
      OSystem::TimerProc callback;
} TimerType, *TimerPtr;

typedef struct {
      Boolean     active;
      void *proc;
      void *param;
} SoundType, *SoundPtr;

class OSystem_PalmBase : public OSystem {
      virtual void int_initBackend() { }
      virtual const GraphicsMode *int_getSupportedGraphicsModes() const;
      virtual void int_updateScreen() = 0;
      virtual void int_initSize(uint w, uint h) = 0;
      virtual void int_setShakePos(int shakeOffset) { }

      virtual void extras_palette(uint8 index, uint8 r, uint8 g, uint8 b) { }
      virtual void int_quit() { }

      virtual void unload_gfx_mode() = 0;
      virtual void load_gfx_mode() = 0;

      virtual void draw_mouse() = 0;
      virtual void undraw_mouse() = 0;
//    virtual bool check_hard_keys() = 0;
      virtual bool check_event(Event &event, EventPtr ev) = 0;
      virtual void timer_handler();
      void battery_handler();
      virtual void get_coordinates(EventPtr ev, Coord &x, Coord &y) = 0;
      void simulate_mouse(Event &event, Int8 iHoriz, Int8 iVert, Coord *xr, Coord *yr);
      virtual void sound_handler() = 0;

      virtual void draw_osd(UInt16 id, Int32 x, Int32 y, Boolean show, UInt8 color = 0);

      enum {
            kKeyNone                = 0,
            kKeyMouseMove           = 1   << 0,
            kKeyMouseLButton  = 1   << 1,
            kKeyCalc                = 1 << 30,
            kKeyAny                       = 1 << 31
      enum {
            MAX_MOUSE_W = 48,
            MAX_MOUSE_H = 48
      struct MousePos {
            int16 x,y,w,h;

      TimerType _timer;
      SoundType _sound;

      RGBColorType _currentPalette[256];
      uint _paletteDirtyStart, _paletteDirtyEnd;
      int _mode, _setMode;
      int16 _screenWidth, _screenHeight;
      Boolean _modeChanged, _gfxLoaded;
      UInt32 _screenPitch;
      PointType _screenOffset;
      struct {
            Coord w, h;
      } _screenDest;
      byte *_screenP, *_offScreenP;
      WinHandle _screenH, _offScreenH;

      int _current_shake_pos;
      int _new_shake_pos;

      Boolean _overlayVisible;
      Boolean _redawOSD, _setPalette;

      UInt32 _keyMouseMask, _keyMouseRepeat, _keyMouseDelay;
      struct {
            UInt32 bitUp;
            UInt32 bitDown;
            UInt32 bitLeft;
            UInt32 bitRight;
            UInt32 bitButLeft;
            Boolean hasMore;
      } _keyMouse;
      bool _mouseVisible;
      bool _mouseDrawn;
      MousePos _mouseCurState;
      MousePos _mouseOldState;
      int16 _mouseHotspotX;
      int16 _mouseHotspotY;
      byte _mouseKeyColor;
      byte *_mouseDataP, *_mouseBackupP;

      eventsEnum _lastEvent;
      WChar _lastKey;
      UInt8 _lastKeyModifier;
      UInt32 _lastKeyRepeat;
      Boolean _useNumPad, _showBatLow;
      UInt32 _batCheckTicks, _batCheckLast;
      int _samplesPerSec;

      void initBackend();

      virtual void setFeatureState(Feature f, bool enable) {};

      bool hasFeature(Feature f);
      bool getFeatureState(Feature f);
      virtual void beginGFXTransaction();
      virtual void endGFXTransaction();
      virtual int16 getOverlayHeight();
      virtual int16 getOverlayWidth();
      virtual int screenToOverlayX(int x);
      virtual int screenToOverlayY(int y);
      virtual int overlayToScreenX(int x);
      virtual int overlayToScreenY(int y);
      virtual OverlayColor ARGBToColor(uint8 a, uint8 r, uint8 g, uint8 b);
      virtual void colorToARGB(OverlayColor color, uint8 &a, uint8 &r, uint8 &g, uint8 &b);
      virtual void setCursorPalette(const byte *colors, uint start, uint num);
      virtual void disableCursorPalette(bool disable);
      virtual void displayMessageOnOSD(const char *msg);
      const GraphicsMode *getSupportedGraphicsModes() const;
      int getGraphicsMode() const;
      virtual int getDefaultGraphicsMode() const;
      virtual bool setGraphicsMode(int mode);
      virtual bool grabRawScreen(Graphics::Surface *surf) { return false; }

      void initSize(uint w, uint h);
      int16 getWidth() { return _screenWidth; }
      int16 getHeight() { return _screenHeight; }

      void setShakePos(int shakeOffset);
      virtual void copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h) = 0;
      virtual void updateScreen();
      virtual void clearScreen();

      bool showMouse(bool visible);
      void warpMouse(int x, int y);
      virtual void setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor, int cursorTargetScale) = 0;

      virtual void showOverlay() = 0;
      virtual void hideOverlay() = 0;
      virtual void clearOverlay() = 0;
      virtual void grabOverlay(OverlayColor *buf, int pitch) = 0;
      virtual void copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h) = 0;

      void setPalette(const byte *colors, uint start, uint num);
      void grabPalette(byte *colors, uint start, uint num);
      virtual OverlayColor RGBToColor(uint8 r, uint8 g, uint8 b) = 0;
      virtual void colorToRGB(OverlayColor color, uint8 &r, uint8 &g, uint8 &b) = 0;
      bool pollEvent(Event &event);
      virtual uint32 getMillis();
      virtual void delayMillis(uint msecs);
      virtual void setTimerCallback(TimerProc callback, int interval);

      virtual MutexRef createMutex() { return NULL; }
      virtual void lockMutex(MutexRef mutex) {}
      virtual void unlockMutex(MutexRef mutex) {}
      virtual void deleteMutex(MutexRef mutex) {}
      virtual bool setSoundCallback(SoundProc proc, void *param) = 0;
      virtual void clearSoundCallback() = 0;
      int getOutputSampleRate() const { return _samplesPerSec; }

      void quit();
      virtual void setWindowCaption(const char *caption) = 0;
      Common::SaveFileManager *getSavefileManager();


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