// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

// This module implemente the class use for a 8 bpp color screen.

// Include files                                                   

// 

//

/**

 @file

*/

/********************************************************************/

#include <bitdraw.h>

#include "scdraw.h"

#include <hal.h>

/********************************************************************/

/*  Implementation of CDrawEightBppScreenBitmapColor class          */

/********************************************************************/

void CDrawEightBppScreenBitmapColor::SetSize(const TSize& aSize) 

	{

	CDrawBitmap::SetSize(aSize);

	__ASSERT_DEBUG(iSize == aSize, User::Invariant());

	iLongWidth = CDrawBitmap::iScanLineWords * 4;

	}

void CDrawEightBppScreenBitmapColor::SetDisplayMode(CFbsDrawDevice* aDrawDevice)

	{

	CopyOldSettings(aDrawDevice) ;

	InitScreen() ;

	}

TInt CDrawEightBppScreenBitmapColor::HorzTwipsPerThousandPixels() const

	{

	if (iSize.iWidth == 0)

		return 0 ;

	TMachineInfoV1Buf miBuf ;

	UserHal::MachineInfo(miBuf) ;

	return miBuf().iPhysicalScreenSize.iWidth * 1000 / iSize.iWidth ;

	}

TInt CDrawEightBppScreenBitmapColor::VertTwipsPerThousandPixels() const

	{

	if (iSize.iHeight == 0)

		return 0 ;

	TMachineInfoV1Buf miBuf ;

	UserHal::MachineInfo(miBuf) ;

	return miBuf().iPhysicalScreenSize.iHeight * 1000 / iSize.iHeight ;

	}

/**

Initialises the palette

*/

TInt CDrawEightBppScreenBitmapColor::InitScreen()

	{

	__ASSERT_ALWAYS(iPaletteAddress!=NULL, Panic(EScreenDriverPanicNullPointer)) ;

	/* Fill the palette to support 8 Bpp color */

	TUint16* palettePtr = iPaletteAddress ;

	for (TInt count = 0; count < KEightBppPaletteEntries; count++)

		*palettePtr++ = TRgb::Color256(count)._Color4K() | KEightBppPixelBitSize ;

	return KErrNone ;

	}

/**

Constructs the CDrawEightBppScreenBitmapColor object.

@param aScreenNo Screen number. It will be used in HAL::Get() calls.

@param aBitmapAddress The screen memory address.

@param aSize Screen size

@return System-wide error codes, KErrNone if the construction was successfull.

*/

TInt CDrawEightBppScreenBitmapColor::ConstructScreenL(TInt aScreenNo, TAny* aBitmapAddress, TSize aSize)

	{

	iScreenNo = aScreenNo;

	TInt displayMode;

	TInt ret = HAL::Get(aScreenNo, HALData::EDisplayMode, displayMode);

	if (ret != KErrNone)

		return ret;

	TInt linepitchInBytes = displayMode;

	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetBetweenLines,linepitchInBytes);

	if (ret != KErrNone)

		return ret;

	CDrawBitmap::iScanLineWords = linepitchInBytes / 4;

	ret = CDrawEightBppBitmapColor::Construct(aSize);

	if (ret != KErrNone)

		return ret ;

	/* Set the pointer on the first palette entry */

	iPaletteAddress = (TUint16*)aBitmapAddress ;

	TInt offsetToFirstPixel = displayMode;

	ret = HAL::Get(aScreenNo,HALData::EDisplayOffsetToFirstPixel, offsetToFirstPixel);

	if (ret != KErrNone)

		return ret;

	iBits = (TUint32*)((TUint32)aBitmapAddress + offsetToFirstPixel);

	return KErrNone ;

	}

void CDrawEightBppScreenBitmapColor::OrientationsAvailable(TBool aOrientation[4])

	{

	aOrientation[EOrientationNormal]     = ETrue ;

	aOrientation[EOrientationRotated90]  = ETrue ;

	aOrientation[EOrientationRotated180] = ETrue ;

	aOrientation[EOrientationRotated270] = ETrue ;

	}

TBool CDrawEightBppScreenBitmapColor::SetOrientation(TOrientation aOrientation)

	{

	iOrientation = aOrientation ;

	return ETrue ;

	}

TInt CDrawEightBppScreenBitmapColor::SetCustomPalette(const CPalette* aPalette)

	{

	TInt ret = CDrawEightBppBitmapColor::SetCustomPalette(aPalette) ;

	if (ret == KErrNone)

		{

		TInt index = 0 ;

		TUint16* palettePtr = iPaletteAddress ;

		const TUint16* const palettePtrLimit = iPaletteAddress + KEightBppPaletteEntries ;

		*palettePtr++ = IndexToColor(index++)._Color4K() | KEightBppPixelBitSize ;

		while (palettePtr < palettePtrLimit)

			*palettePtr++ = IndexToColor(index++)._Color4K() ;

		}

	return ret ;

	}