// Copyright (c) 1997-2009 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:

//

#include <hal.h>

#include "scdraw.h"

/**

Constructs the CDrawScreenBitmap 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 CDrawScreenBitmap::ConstructScreen(TInt aScreenNo, TAny* aBitmapAddress,TSize aSize)

	{

    iScreenNo = aScreenNo;

	TInt ret = SCREEN_LAYOUT_BASE_BITMAP::Construct(aSize);

	if (ret != KErrNone)

		return ret;

	//fixup for emulating smaller screen

	TInt offset = 0;

	// get the offset in bytes

	ret = HAL::Get(iScreenNo, HALData::EDisplayOffsetBetweenLines, offset);

	TInt bitsPerPixel = BitsPerPixel(iDispMode);

 	TInt bytesPerPixel  = (bitsPerPixel/8 + (bitsPerPixel % 8 ? 1 : 0));

	if (ret == KErrNone )

		{

		// Find iLongwidth (in pixels) from the offset (in bytes).

		if (bitsPerPixel >= 8)

			{

			// a pixel fits in 1 or more bytes

		    iLongWidth =  offset / bytesPerPixel;

			}

			else

			{

			// 1 or more pixels per byte

			TInt pixelsPerByte  = 8 / bitsPerPixel;

		    iLongWidth =  offset * pixelsPerByte;

			}

		iScanLineWords = offset / 4;

		// correct the size of the ScanLineBuffer

		User::Heap().Free(iScanLineBuffer);

		iScanLineBuffer = (TUint32*)(User::Heap().Alloc(offset));

		if(iScanLineBuffer == NULL)

			return KErrNoMemory;

		}

	else

		{

		return ret;

		}

	//fixup for emulating smaller screen

	offset = 0; // Pass in display mode

	ret = HAL::Get(iScreenNo, HALData::EDisplayOffsetToFirstPixel,offset);

	iBits = (TUint32*)aBitmapAddress;

	iBits += offset / sizeof(TUint32);

	return ret;

	}

void CDrawScreenBitmap::SetDisplayMode(CFbsDrawDevice* aDrawDevice)

	{

	CopyOldSettings(aDrawDevice);

	}

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

	{

	aOrientation[EOrientationNormal] = ETrue;

	aOrientation[EOrientationRotated90] = ETrue;

	aOrientation[EOrientationRotated180] = ETrue;

	aOrientation[EOrientationRotated270] = ETrue;

	}

TBool CDrawScreenBitmap::SetOrientation(TOrientation aOrientation)

	{

	iOrientation = aOrientation;

	return ETrue;

	}

TInt CDrawScreenBitmap::HorzTwipsPerThousandPixels() const

	{

	if (iSize.iWidth == 0)

		return 0;

	TInt twips = 0;

	HAL::Get(iScreenNo, HALData::EDisplayXTwips,twips);

	return twips * 1000 / iSize.iWidth; // iSize gets iWidth and iHeight swapped by changing the orientation so always use iWidth

	}

TInt CDrawScreenBitmap::VertTwipsPerThousandPixels() const

	{

	if (iSize.iHeight == 0)

		return 0;

	TInt twips = 0;

	HAL::Get(iScreenNo, HALData::EDisplayYTwips,twips);

	return twips * 1000 / iSize.iHeight;

	}