/*

* Copyright (c) 2009 Sony Ericsson Mobile Communications AB

* 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:

* Sony Ericsson Mobile Communications AB - initial contribution.

* Nokia Corporation - additional changes.

* 

* Contributors:

* 

* Description:

* Implements the Enhanced SMS Picture (Small/Large/Variable) Information Element.

*

*/

/**

 *  @file

 *  

 *  Implements  CEMSPictureIE class

 */

#include <emspictureie.h>

#include <fbs.h>

CEmsPictureIE* CEmsPictureIE::NewL()

	{

	CEmsPictureIE* self = new (ELeave) CEmsPictureIE();

	return self;

	}

EXPORT_C CEmsPictureIE* CEmsPictureIE::NewL(const CFbsBitmap& aBitmap)

/**

 *  @capability None

 */

	{

	CEmsPictureIE* self = new (ELeave) CEmsPictureIE();

	CleanupStack::PushL(self);

	self->ConstructL(aBitmap);

	CleanupStack::Pop(self);

	return self;

	}

EXPORT_C CEmsInformationElement* CEmsPictureIE::DuplicateL() const

/**

 *  @capability None

 */

	{

	CEmsPictureIE* copy = new (ELeave) CEmsPictureIE();

	CleanupStack::PushL(copy);

	copy->CopyL(*this);

	CleanupStack::Pop(copy);

	return copy;

	}

EXPORT_C TSize CEmsPictureIE::SizeInPixels() const

/**

 *  @capability None

 */

	{

	return iSize;

	}

void CEmsPictureIE::ConstructL(const CFbsBitmap& aBitmap)

	{

	__ASSERT_ALWAYS(!iPictureBuf, User::Leave(KErrCorrupt));

	iSize = aBitmap.SizeInPixels();

	if ((iSize == KSmallPicSize) || (iSize == KLargePicSize))

		{

		iIdentifier  = (iSize == KSmallPicSize) ? CSmsInformationElement::ESmsEnhancedSmallPicture : CSmsInformationElement::ESmsEnhancedLargePicture;

		iPictureBuf = CreatePictureBufferL(aBitmap);

		iEncodedBodyLength=iSize.iHeight*iSize.iWidth/8;

		}

	else

		{

		// Make sure bitmap is a x of 8 bits wide

		iIdentifier  = CSmsInformationElement::ESmsEnhancedVariablePicture;

		TSize size = aBitmap.SizeInPixels();

		iSize.iHeight = size.iHeight;

		if (size.iWidth%8 != 0)

			User::Leave(KErrCorrupt);

		iPictureBuf = CreatePictureBufferL(aBitmap);

		// The length is the picture size plus two bytes to specify

		// the width and height

		iEncodedBodyLength=iSize.iHeight*iSize.iWidth/8+2;

		}

	__ASSERT_ALWAYS(iPictureBuf->Length() <= EEnhancedMaxSize, User::Leave(KErrTooBig));

	}

HBufC8* CEmsPictureIE::CreatePictureBufferL(const CFbsBitmap& aBitmap)

	{

	__ASSERT_ALWAYS(aBitmap.SizeInPixels().iWidth%8==0, User::Leave(KErrCorrupt));

	const TSize size = aBitmap.SizeInPixels();

	const TInt numLineBytes = size.iWidth/8;

	HBufC8* pictureBuf = HBufC8::NewLC(numLineBytes * size.iHeight);

	HBufC8* scanLine = HBufC8::NewLC(numLineBytes);

	TPtr8 line(scanLine->Des());

	HBufC8* working = HBufC8::NewLC(numLineBytes);

	TPtr8 convertedScanLine(working->Des());

	convertedScanLine.SetLength(numLineBytes);

	TUint8 byte;

	for (TInt a=0; a<size.iHeight; a++)

		{

		aBitmap.GetScanLine(line, TPoint(0,a), size.iWidth, EGray2);

		for (TInt word=0; word<numLineBytes; word++)

			{

			// Convert EMS Black=1 to Epoc Black=0

			// and Convert little endean to big.

			byte = 0;

			for (TInt bit=0; bit<8; bit++)

				byte |= (line[word] & (1<<bit)) ? 0 : (1<<(7-bit));

			convertedScanLine[word] = byte;

			}

		pictureBuf->Des().Append(convertedScanLine);

		}

	CleanupStack::PopAndDestroy(2, scanLine);

	CleanupStack::Pop(pictureBuf);

	return pictureBuf;

	}

EXPORT_C void CEmsPictureIE::CopyL(const CEmsPictureIE& aSrc)

/**

 *  @capability None

 */

	{

	__ASSERT_ALWAYS(aSrc.iPictureBuf, User::Leave(KErrCorrupt));

	CEmsInformationElement::CopyL(aSrc);

	iSize = aSrc.iSize;

	delete iPictureBuf;

	iPictureBuf=NULL;

	iPictureBuf = aSrc.iPictureBuf->AllocL();

	}

/**

 *  Encodes the information element into its raw format. (no IE id)

 *  

 *  @param aPtr the buffer to be used which is to contain the data

 *  @param TBool boolean to indicate if it is for serialisation or encoding

 */

void CEmsPictureIE::EncodeBodyL(TPtr8 aPtr, TBool) const

	{

	__ASSERT_ALWAYS(iPictureBuf, User::Leave(KErrCorrupt));

	__ASSERT_ALWAYS(iSize.iWidth<255 && iSize.iHeight<255, User::Leave(KErrCorrupt));

	TBool variablePicture = ((iSize != KSmallPicSize) && (iSize != KLargePicSize));

	__ASSERT_ALWAYS((variablePicture && iIdentifier == CSmsInformationElement::ESmsEnhancedVariablePicture) ||

		(!variablePicture && iIdentifier != CSmsInformationElement::ESmsEnhancedVariablePicture), User::Leave(KErrCorrupt));

	if (variablePicture)

		{

		aPtr.Append(static_cast<TUint8>(iSize.iWidth/8));

		aPtr.Append(static_cast<TUint8>(iSize.iHeight));

		}

	aPtr.Append(*iPictureBuf);

	}

/**

 *  Decodes the raw data out of an information element into this class.

 *  

 *  @param aPtr The raw predefined animation data

 *  @param TBool boolean to indicate if it is from serialisation

 *  @leave KErrGeneral If the size of the data does not match what is expected.

 */

void CEmsPictureIE::DecodeBodyL(const TPtrC8 aPtr, TBool)

	{

	switch (iIdentifier)

		{

		case CSmsInformationElement::ESmsEnhancedSmallPicture:

			__ASSERT_ALWAYS(aPtr.Length()==ESmallBufSize, User::Leave(KErrGeneral));

			iSize = KSmallPicSize;

			break;

		case CSmsInformationElement::ESmsEnhancedLargePicture:

			__ASSERT_ALWAYS(aPtr.Length()==ELargeBufSize, User::Leave(KErrGeneral));

			iSize = KLargePicSize;

			break;

		case CSmsInformationElement::ESmsEnhancedVariablePicture:

			iSize.iWidth = static_cast<TUint8>(aPtr[0]) * 8;

			iSize.iHeight = static_cast<TUint8>(aPtr[1]);

			__ASSERT_ALWAYS(aPtr.Length()==(iSize.iWidth/8*iSize.iHeight)+2, User::Leave(KErrGeneral));

			break;

		default:

			User::Leave(KErrArgument);

		}

	delete iPictureBuf;

	iPictureBuf = NULL;

	if (iIdentifier == CSmsInformationElement::ESmsEnhancedVariablePicture)

		iPictureBuf = aPtr.Mid(2).AllocL();

	else

		iPictureBuf = aPtr.AllocL();

	}

CEmsPictureIE::CEmsPictureIE() : CEmsInformationElement(CSmsInformationElement::ESmsEnhancedSmallPicture){};

EXPORT_C CEmsPictureIE::~CEmsPictureIE()

/**

 *  @capability None

 */

	{

	delete iPictureBuf;

	}

EXPORT_C CFbsBitmap* CEmsPictureIE::GetBitmapL() const

/**

 *  @capability None

 */

	{

	CFbsBitmap* bitmap = new (ELeave) CFbsBitmap();

	CleanupStack::PushL(bitmap);

	TInt numLineBytes = iSize.iWidth/8;

	User::LeaveIfError(bitmap->Create(iSize,EGray2));

	HBufC8* working = HBufC8::NewLC(numLineBytes);

	TPtr8 convertedScanLine(working->Des());

	convertedScanLine.SetLength(numLineBytes);

	TUint8 byte = 0;

	TUint8* adr=NULL;

	for (TInt line =0; line < iSize.iHeight; line++)

		{

		adr = &((iPictureBuf->Des())[(numLineBytes) * line]);

		TPtr8  scanLine(adr, numLineBytes, numLineBytes);

		for (TInt word=0; word<numLineBytes; word++)

			{

			// Convert EMS Black=1 to Epoc Black=0

			// and Convert little endean to big.

			byte=0;

			for (TUint bit=0; bit<8; bit++)

				byte |= (scanLine[word] & (1<<bit)) ? 0 : (1<<(7-bit));

			convertedScanLine[word] = byte;

			}

		bitmap->SetScanLine(convertedScanLine, line);

		}

	CleanupStack::PopAndDestroy(working);

	CleanupStack::Pop(bitmap);

	return bitmap;

	}