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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_os5.h $
 * $Id: be_os5.h 24417 2006-10-21 18:36:35Z chrilith $

#ifndef BE_OS5_H
#define BE_OS5_H

#include "be_base.h"

#if !defined(SYSTEM_CALLBACK) || defined(PALMOS_68K)
#     define SYSTEM_CALLBACK
#     ifdef PALMOS_ARM
#           define CALLBACK_PROLOGUE \
                  __asm { \
                        stmfd  r13!,{r9,r10}; \
                        ldr      r9,[r0]; \
                        ldr      r10,[r0,#4]; \
#           define CALLBACK_EPILOGUE __asm { ldmfd  r13!,{r9,r10} }
#           define CALLBACK_INIT(regs) \
                  __asm { \
                        ldr  r0, = regs; \
                        add    r0,r0,r10; \
                        str    r9,[r0]; \
                        str    r10,[r0,#4]; \
#     else
#           define CALLBACK_PROLOGUE \
                  asm ( \
                        movem.l a4-a5, -(sp);   \
                        move.l UserDataP, a0;   \
                        move.l 0(a0), a4; \
                        move.l 4(a0), a5; \
#           define CALLBACK_EPILOGUE asm ( movem.l (sp)+, a4-a5 );
#           define CALLBACK_INIT(regs) \
                  {     \
                        void *ptr = &regs; \
                        asm ( \
                              move.l      ptr, a0;    \
                              move.l      a4, 0(a0);  \
                              move.l      a5, 4(a0);  \
                        ); \
#     endif
#     define CALLBACK_INIT(regs)

// TODO : change / remove this
#define gfxMakeDisplayRGB_BigEndian(_r,_g,_b) \
  ( (((_g) & 0xFC) << 11) | (((_b) & 0xF8) << 5) | ((_r) & 0xF8) | (((_g) & 0xFF) >> 5) )

#define gfxMakeDisplayRGB_LittleEndian(_r,_g,_b) \
  ( (((_r) & 0xF8) << 8) | (((_g) & 0xFC) << 3) | (((_b) & 0xF8) >> 3) )

#if CPU_TYPE == CPU_68K
#define gfxMakeDisplayRGB(_r,_g,_b) gfxMakeDisplayRGB_BigEndian(_r,_g,_b)
#define gfxMakeDisplayRGB(_r,_g,_b) gfxMakeDisplayRGB_LittleEndian(_r,_g,_b)

typedef struct {
      // for real thread version only
      UInt32 __reg1;
      UInt32 __reg2;

      // no real thread version
      Boolean set;
      UInt32      size;
      void *dataP;

      // default sound stuff
      SndStreamRef handle;
      SoundPtr sound;
} SoundExType, *SoundExPtr;
extern SoundExType _soundEx;

class OSystem_PalmOS5 : public OSystem_PalmBase {
      typedef void (OSystem_PalmOS5::*RendererProc)(RectangleType &r, PointType &p);
      RendererProc _render;

      OverlayColor *_overlayP;
      WinHandle _overlayH, _workScreenH;
      int16 _nativePal[256], _mousePal[256];
      int16 *_workScreenP;
      Boolean _isSwitchable, _wasRotated;

      virtual void int_initBackend();
      virtual void int_updateScreen();
      virtual void int_initSize(uint w, uint h);

      virtual void unload_gfx_mode();
      virtual void load_gfx_mode();
      virtual void hotswap_gfx_mode(int mode);

      void draw_mouse();
      void undraw_mouse();
      virtual void get_coordinates(EventPtr ev, Coord &x, Coord &y);
      virtual bool check_event(Event &event, EventPtr ev);
      virtual void extras_palette(uint8 index, uint8 r, uint8 g, uint8 b);

      void render_landscape(RectangleType &r, PointType &p);
      void render_portrait(RectangleType &r, PointType &p);
      void render_1x(RectangleType &r, PointType &p);
      WinHandle alloc_screen(Coord w, Coord h);
      virtual void draw_osd(UInt16 id, Int32 x, Int32 y, Boolean show, UInt8 color = 0);

      virtual SndStreamVariableBufferCallback sound_callback();
      virtual void sound_handler();

      UInt16 _sysOldCoord, _sysOldOrientation;
      Boolean _stretched, _cursorPaletteDisabled;

      static OSystem *create();

      bool hasFeature(Feature f);

      void copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h);
      void clearScreen();

      void setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, byte keycolor, int cursorTargetScale);
      virtual void setCursorPalette(const byte *colors, uint start, uint num);
      void disableCursorPalette(bool disable);

      void showOverlay();
      void hideOverlay();
      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 OverlayColor RGBToColor(uint8 r, uint8 g, uint8 b);
      virtual void colorToRGB(OverlayColor color, uint8 &r, uint8 &g, uint8 &b);

      virtual bool setSoundCallback(SoundProc proc, void *param);
      void clearSoundCallback();

      void setWindowCaption(const char *caption);



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