/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: Minimalistic pointer driver

*

*/

#ifndef _SYBORG_POINTER_H

#define _SYBORG_POINTER_H

#include <kernel.h>

#include <system.h>

#include <videodriver.h>

#include <hal.h>

#define FIFO_SIZE 16

#ifdef DEBUG

#define __DEBUG_PRINT(format...)    Kern::Printf(format)

#else

#define __DEBUG_PRINT(format...)    __KTRACE_OPT(KBOOT,Kern::Printf(format))

#endif

class TPointerRv

{

public:

  TPointerRv();

  virtual ~TPointerRv();

  static TInt DoPointerHalFunction(TAny* aThis, TInt aFunction, TAny* a1, TAny* a2);

  TInt PointerHalFunction(TInt aFunction, TAny* a1, TAny* a2);

  void Init3();

 private:

  struct PData {

	TInt x;

	TInt y;

	TInt z;

	TInt but;

  };

  struct PData* FifoPop(void);

  void FifoPush(struct PData*);

  struct PData iPDataFifo[FIFO_SIZE];

  TInt iFifoPos;

  TInt iFifoCount;

 private:

  static void Isr(TAny* aPtr);

  static void RxDfc(TAny* aPtr );

  static void Process(TPointerRv *i, struct PData *);

  TDfc iRxDfc;

  TBool iPointerOn;       // cursor visiability

  TInt  iScreenWidth;

  TInt  iScreenHeight;

  TInt  iDisplayMode;

  TInt ix,iy;

  TInt iLastBut;

 public:

  enum {

    POINTER_ID          = 0,

    POINTER_LATCH       = 1,

    POINTER_FIFO_COUNT  = 2,

    POINTER_X           = 3,

    POINTER_Y           = 4,

    POINTER_Z           = 5,

    POINTER_BUTTONS     = 6,

    POINTER_INT_ENABLE  = 7

  };

 private:

  // Fixed point maths

  class Fixed {

  private:

	int g;

	const static int BP = 8;

	const static int BP2 = BP*2;

	enum FixedRaw { RAW };

    Fixed(FixedRaw, int guts) : g(guts) {}

  public:

    Fixed() : g(0) {}

    Fixed(const Fixed& a) : g( a.g ) {}

    Fixed(int a) : g( a << BP ) {}

	operator int() { return g>>BP; }

	Fixed operator +() const { return Fixed(RAW,g); }

	Fixed operator -() const { return Fixed(RAW,-g); }

	Fixed operator +(const Fixed& a) const { return Fixed(RAW, g + a.g); }

	Fixed operator -(const Fixed& a) const { return Fixed(RAW, g - a.g); }

	Fixed operator *(const Fixed& a) const { return Fixed(RAW,  (int)( ((long long)g * (long long)a.g ) >> BP)); }

	Fixed operator /(const Fixed& a) const { return Fixed(RAW, int( (((long long)g << BP2) / (long long)(a.g)) >> BP) ); }

  };

  Fixed iXFactor;

  Fixed iYFactor;

};

#endif