/*

* Copyright (c) 1996-2009 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 <s32file.h>

#include <fntstore.h>

#include "FNTBODY.H"

#include <graphics/openfontconstants.h>

CFontStoreFile::CFontStoreFile()

 :	iCollectionUid(KNullUid),

	iUsageCount(1),

	iFileStore(NULL),

	iFileAddress(0),

	iDataStreamId(KNullStreamId)

	{

	}

void CFontStoreFile::ConstructL(const TParse& aParse,RFs& aFs)

	{

	TInt drive;

	User::LeaveIfError(RFs::CharToDrive(aParse.Drive()[0], drive));

	TDriveInfo driveinfo;

	User::LeaveIfError(aFs.Drive(driveinfo, drive));

	RFile file;

	// store the filename

	iFullName = aParse.FullName().AllocL();

	User::LeaveIfError(file.Open(aFs, *iFullName, EFileStream | EFileRead | EFileShareReadersOnly));

	// check to see if the fonts are stored on ROM.  Note that NAND != rom so font files in NAND devices

	// must be handled as if they were in RAM.  A NULL pointer returned by IsFileInRom means its RAM

	if (aFs.IsFileInRom(*iFullName)!=NULL)

		{

		// fonts are stored on a XIP (execute in place) device

		TInt ret = file.Seek(ESeekAddress, iFileAddress);

		if (ret != KErrNone)

			{

			file.Close();

			User::Leave(ret);

			}

		}

	// convert RFile into a CDirectFileStore

	CDirectFileStore* fileStore = CDirectFileStore::FromLC(file);

	if (fileStore->Type()[1] != TUid::Uid(KFontStoreFileUidVal))

		User::Leave(KErrNotSupported);

	TStreamId headerid = fileStore->Root();

	RStoreReadStream stream;

	stream.OpenLC(*fileStore, headerid);

	TInt fnttranversion = stream.ReadInt32L();

	// This works for version 42 (with new metrics) and for earlier versions 

	// which will synthesize the required metrics. It may have to be changed 

	// if the version number is incremented again.

	if (fnttranversion < (KFnttranVersion - 1)  && fnttranversion != KFnttran7650Version) 

		User::Leave(KErrNotSupported);

	iFontVersion = fnttranversion;

	stream >> iCollectionUid;

	iKPixelAspectRatio = stream.ReadInt32L();

	stream >> iDataStreamId;

	CleanupStack::PopAndDestroy(&stream);	// close root stream

	// ensure font data stream can be opened

	stream.OpenLC(*fileStore, iDataStreamId);

	CleanupStack::PopAndDestroy(&stream);	// close font stream

	// transfer ownership of fileStore

	CleanupStack::Pop(fileStore);

	iFileStore = fileStore;

	}

CFontStoreFile* CFontStoreFile::NewL(const TParse& aParse, RFs& aFs)

	{

	CFontStoreFile* fontstorefile = new(ELeave) CFontStoreFile;

	CleanupStack::PushL(fontstorefile);

	fontstorefile->ConstructL(aParse, aFs);

	CleanupStack::Pop();

	return fontstorefile;

	}

CFontStoreFile::~CFontStoreFile()

	{

	delete iFullName;

	iFullName = NULL;

	delete iFileStore;

	iFileStore = NULL;

	}

TBitmapCodeSection::TBitmapCodeSection()

 :	TCodeSection(),

	iCharacterData(),

	iBitmapData()

	{

	}

//This method is called  from CFontBitmap::InternalizeL.

//We have to read stream IDs from the stream, not offsets.

//Obviously the method is called once per life time of 

//CFontBitmap instance.

void TBitmapCodeSection::InternalizeL(RReadStream &aStream)

	{

	iStart = aStream.ReadUint16L();

	iEnd = aStream.ReadUint16L();

	aStream >> iCharacterData.iOffsetsId;

	aStream >> iBitmapData.iBitmapId; 

	}

//This method is called  from CFontBitmap::RestoreComponentsL - 

//if the CFontBitmap instance is in RAM and CFontBitmap::iComponentsRestored is EFalse.

//We use here stream IDs, not offsets.

//If the memory allocation for the offsets doesn't fail - aAllocMemCounter is incremented

//After calling of TBitmapCodeSection::InternalizeOffsetsL character metrics streamID is no more valid - 

//we have valid character metrics offset into RAM memory.

void TBitmapCodeSection::InternalizeOffsetsL(const CStreamStore& aStreamStore, RHeap* aHeap, TInt& aAllocMemCounter)

	{

	RStoreReadStream stream;

	stream.OpenLC(aStreamStore, iCharacterData.iOffsetsId);

	TInt size = stream.ReadInt32L();

	TBitmapFontCharacterOffset* characterOffsetsList = (TBitmapFontCharacterOffset*)aHeap->AllocL(sizeof(TBitmapFontCharacterOffset) * size);

	aAllocMemCounter++;

	iCharacterData.iCharacterOffsetsListOffset = TInt(characterOffsetsList) - TInt(this);

	TBitmapFontCharacterOffset* pEnd = characterOffsetsList + size;

	for (TBitmapFontCharacterOffset* p = characterOffsetsList; p < pEnd; p++)

		{

		p->InternalizeL(stream);

		}

	CleanupStack::PopAndDestroy();

	}

//This method is called  from CFontBitmap::RestoreComponentsL - 

//if the CFontBitmap instance is in RAM and CFontBitmap::iComponentsRestored is EFalse.

//We use here stream IDs, not offsets.

//If the memory allocation for the bitmap doesn't fail - aAllocMemCounter is incremented

//After calling of TBitmapCodeSection::InternalizeBitmapL bitmap streamID is no more valid - 

//we have valid bitmap offset into RAM memory.

void TBitmapCodeSection::InternalizeBitmapL(const CStreamStore& aStreamStore, RHeap* aHeap, TInt& aAllocMemCounter)

	{

	RStoreReadStream stream;

	stream.OpenLC(aStreamStore, iBitmapData.iBitmapId);

	TInt size = stream.ReadInt32L();

	TUint8* bitmap = (TUint8*)aHeap->AllocL(size);

	aAllocMemCounter++;

	iBitmapData.iBitmapOffset = TInt(bitmap) - TInt(this);

	stream.ReadL(bitmap, size);

	CleanupStack::PopAndDestroy();

	}

//This method is called from CFontBitmap::InternalizeL if the

//CFontBitmap instance is in ROM.

//We use here stream IDs to calculate offsets.

//After calling of TBitmapCodeSection::FixUpComponents streamIDs are no more valid - 

//we have valid offsets into ROM memory.

//Obviously the method is called once per life time of 

//CFontBitmap instance.

void TBitmapCodeSection::FixUpComponents(TInt aFileAddress)

	{

	TBitmapFontCharacterOffset* characterOffsetsList = (TBitmapFontCharacterOffset*) (aFileAddress + sizeof(TInt) + iCharacterData.iOffsetsId);

	iCharacterData.iCharacterOffsetsListOffset = TInt(characterOffsetsList);

	TUint8* bitmap = (TUint8*) (aFileAddress + sizeof(TInt) + iBitmapData.iBitmapId);

	iBitmapData.iBitmapOffset = TInt(bitmap);

	}

//This method is caled from CFontBitmap::DeleteComponents(),

//only if the CFontBitmap instance is in RAM.

void TBitmapCodeSection::DeleteOffsets(RHeap* aHeap)

	{

	TBitmapFontCharacterOffset*  charactersOffsetsList = CharacterOffsetsList(ETrue);

	if(TUint32(this) != TUint32(charactersOffsetsList))

		{

		aHeap->Free(charactersOffsetsList);

		}

	}

//This method is caled from CFontBitmap::DeleteComponents(),

//only if the CFontBitmap instance is in RAM.

void TBitmapCodeSection::DeleteBitmap(RHeap* aHeap)

	{

	TUint8* bitmap = Bitmap(ETrue);

	if(TUint32(this) != TUint32(bitmap))

		{

		aHeap->Free(bitmap);

		}

	}

TBitmapFontCharacterOffset* TBitmapCodeSection::CharacterOffsetsList(TBool aIsInRAM) const

	{

	return reinterpret_cast <TBitmapFontCharacterOffset*> 

		(iCharacterData.iCharacterOffsetsListOffset + (aIsInRAM ? TInt(this) : 0));

	}

TUint8* TBitmapCodeSection::Bitmap(TBool aIsInRAM) const

	{

	return reinterpret_cast <TUint8*> 

		(iBitmapData.iBitmapOffset + (aIsInRAM ? TInt(this) : 0));

	}

TCharacterMetricsTable::TCharacterMetricsTable(RHeap* aHeap)

 :	iHeap(aHeap),

	iMetricsStartId(KNullStreamId),

	iCharacterMetricsStartPtr(0),

	iNumberOfMetrics(0),

	iMetricsOnHeap(EFalse)

	{}

void TCharacterMetricsTable::InternalizeL(RReadStream& aStream)

	{

	iMetricsStartId = aStream.ReadInt32L();

	iNumberOfMetrics = aStream.ReadInt32L();

	}

void TCharacterMetricsTable::InternalizeMetricsL(RReadStream& aStream)

	{

	aStream.ReadInt32L(); // size

	TBitmapFontCharacterMetrics* charactermetricslist = static_cast<TBitmapFontCharacterMetrics*>(iHeap->AllocL(sizeof(TBitmapFontCharacterMetrics) * iNumberOfMetrics));

	iMetricsOnHeap = ETrue;

	// Offset from this to location on the heap ('cos the file is not in ROM)

	iCharacterMetricsStartPtr = reinterpret_cast<TInt>(charactermetricslist) - reinterpret_cast<TInt>(this);

	TBitmapFontCharacterMetrics* pEnd = charactermetricslist + iNumberOfMetrics;

	for (TBitmapFontCharacterMetrics* p = charactermetricslist; p < pEnd; p++)

		{

		p->InternalizeL(aStream);

		}

	}

void TCharacterMetricsTable::RestoreL(const CStreamStore& aStreamStore)

	{

	if (iCharacterMetricsStartPtr == 0)

		{	// We haven't already read it in from RAM file

		RStoreReadStream stream;

		stream.OpenLC(aStreamStore, iMetricsStartId);

		InternalizeMetricsL(stream);

		CleanupStack::PopAndDestroy();

		}

	}

void TCharacterMetricsTable::FixUp(TInt aFileAddress)

	{

	TBitmapFontCharacterMetrics* charactermetricslist = reinterpret_cast<TBitmapFontCharacterMetrics*>(aFileAddress + sizeof(TInt) + iMetricsStartId.Value());

	iCharacterMetricsStartPtr = TInt(charactermetricslist);	// Ptr to location in a ROM file

	iMetricsStartId = KNullStreamId;

	iMetricsOnHeap = EFalse;

	}

void TCharacterMetricsTable::Delete()

	{	// This routine is only called if the font file is in RAM, not ROM, and therefore the metrics have been stashed on the heap

    if (iMetricsOnHeap && iCharacterMetricsStartPtr)

        {

        iHeap->Free(reinterpret_cast<TAny*>(MetricsFromOffset(0)));

        iCharacterMetricsStartPtr = 0;

        iMetricsOnHeap = EFalse;

        }

	}

const TBitmapFontCharacterMetrics* TCharacterMetricsTable::Metric(TInt aIndex) const

	{

    // Sometimes the start ptr is to a metrics heap item and sometimes it points into a ROM file

    if (iMetricsOnHeap)

        {

        // Start ptr is to metrics heap item

        return MetricsFromOffset(aIndex);

        }

    else

        {

        // Start ptr is to a file in ROM

        return reinterpret_cast<const TBitmapFontCharacterMetrics*> (iCharacterMetricsStartPtr + (aIndex * sizeof(TBitmapFontCharacterMetrics)));

        }

	}

TInt TCharacterMetricsTable::NumberOfMetrics() const

	{

	return iNumberOfMetrics;

	}

TBitmapFontCharacterMetrics* TCharacterMetricsTable::MetricsFromOffset(TInt aIndex) const

    {

    __ASSERT_DEBUG(iMetricsOnHeap,Panic(EFntMetricsNotOnHeap));

    return reinterpret_cast<TBitmapFontCharacterMetrics*>(reinterpret_cast<TInt>(this) + iCharacterMetricsStartPtr+ (aIndex * sizeof(TBitmapFontCharacterMetrics)));

    }

CFontBitmap::CFontBitmap(RHeap* aHeap, CFontStoreFile* aFontStoreFile)

 :	iHeap(aHeap),

	iFontStoreFileOffset(0),

	iUid(KNullUid),

	iPosture(0),

	iStrokeWeight(0),

	iIsProportional(0),

	iIsInRAM(!aFontStoreFile->iFileAddress),

	iUsageCount(1),

	iCellHeightInPixels(0),

	iAscentInPixels(0),

	iMaxCharWidthInPixels(0),

	iMaxNormalCharWidthInPixels(0),

	iBitmapEncoding(0),

	iNumCodeSections(0),

	iCodeSectionListOffset(0),

	iCharacterMetricsTable(aHeap),

	iComponentsRestored(EFalse),

	iAllocMemCounter_Offsets(0),

	iAllocMemCounter_Bitmaps(0),

	iFontCapitalAscent(0),

	iFontMaxAscent(0),

	iFontStandardDescent(0),

	iFontMaxDescent(0),

	iFontLineGap(0)

	{

	iFontStoreFileOffset = TInt(aFontStoreFile) - TInt(this);

	}

void CFontBitmap::InternalizeL(RReadStream &aStream, TInt aFontVersion)

	{

	aStream >> iUid;

	iPosture = aStream.ReadInt8L();

	iStrokeWeight = aStream.ReadInt8L();

	iIsProportional = aStream.ReadInt8L();

	iCellHeightInPixels = aStream.ReadInt8L();

	iAscentInPixels = aStream.ReadInt8L();

	iMaxCharWidthInPixels = aStream.ReadInt8L();

	iMaxNormalCharWidthInPixels = aStream.ReadInt8L();

	if ( aFontVersion  >= KFnttranVersion )

		{ // read the new metrics in

		iFontCapitalAscent = aStream.ReadInt8L();

		iFontMaxAscent = aStream.ReadInt8L();

		iFontStandardDescent = aStream.ReadInt8L();

		iFontMaxDescent = aStream.ReadInt8L();

		iFontLineGap = aStream.ReadInt8L();

		}

	else // synthesize the extra metrics (data compatibility with third party bitmap fonts for old phones)

		{

		iFontMaxAscent = iFontCapitalAscent = iAscentInPixels;

		iFontMaxDescent = iFontStandardDescent = iCellHeightInPixels - iAscentInPixels;

		iFontLineGap = ( ( iCellHeightInPixels * 12 ) + 5) / 10;  // 1.2 times design height

		}	

	iBitmapEncoding = aStream.ReadInt32L();

	iCharacterMetricsTable.InternalizeL(aStream);

	const TBool fixup = FontStoreFile()->iFileAddress;

	if (fixup)

		{

		iCharacterMetricsTable.FixUp(FontStoreFile()->iFileAddress);

		}

	iNumCodeSections = aStream.ReadInt32L();

	TBitmapCodeSection* codesectionlist = (TBitmapCodeSection*)User::LeaveIfNull(iHeap->AllocL(iNumCodeSections * sizeof(TBitmapCodeSection)));

	iCodeSectionListOffset = TInt(codesectionlist) - TInt(this);

	for (TInt i = 0; i < iNumCodeSections; i++)

		{

		new(codesectionlist + i) TBitmapCodeSection;

		codesectionlist[i].InternalizeL(aStream);

		if (fixup)

			codesectionlist[i].FixUpComponents(FontStoreFile()->iFileAddress);

		}

	}

void CFontBitmap::UseL()

	{

	// Note object is created with a Usage Count of 1.

	// So incrementing to 2 normally indicates the first external reference.

	iUsageCount++;

	if (iUsageCount == 2)

		{

		RestoreComponentsL();

		}

	}

void CFontBitmap::Release()

	{

	iUsageCount--;

	if (!iUsageCount)

		{ // object and all its users have closed

		delete this;

		}

	}

/*

Get the metrics for a given character.

Return aBytes as null if the character aCode doesn't exist in the font.

*/

TBitmapFontCharacterMetrics CFontBitmap::CharacterMetrics(TInt aCode, const TUint8*& aBytes) const

	{

 	const TBitmapCodeSection* matchSection = NULL;

	const TBitmapCodeSection* const lastSection = CodeSectionList() + iNumCodeSections - 1;

	TBitmapFontCharacterOffset offset;

	aBytes = NULL;

	TBitmapFontCharacterMetrics metrics;

	const TBitmapCodeSection* startSearchBand = CodeSectionList();

	TInt numCodeSectionsRemaining = iNumCodeSections;

	while (numCodeSectionsRemaining >= 1)

		{

		TInt halfNumCodeSectionsRemaining = numCodeSectionsRemaining/2;

		const TBitmapCodeSection* centralSearchBand = startSearchBand+halfNumCodeSectionsRemaining;

		if ((aCode >= centralSearchBand->iStart) && (aCode <= centralSearchBand->iEnd))

			{

			matchSection = centralSearchBand;

			break;

			}

		else if ((aCode < centralSearchBand->iStart) || (centralSearchBand == lastSection))

			numCodeSectionsRemaining = halfNumCodeSectionsRemaining;

		else

			{

			startSearchBand = centralSearchBand + 1;

			numCodeSectionsRemaining -= halfNumCodeSectionsRemaining + 1;

			}

		}

	if (matchSection)

		{

		offset =* ((matchSection->CharacterOffsetsList(iIsInRAM)) + (aCode-matchSection->iStart));

		// Fill characters within code section.

		// Recursive call ensures that a valid metric is always returned.

		if (offset.iBitmapOffset == KFillCharacterOffset)

			{

			return CharacterMetrics(KReplacementCharacter, aBytes);

			}

		aBytes = matchSection->Bitmap(iIsInRAM) + offset.iBitmapOffset;

		// retrieve metric index from encoded 1 or 2 bytes

		TInt index = 0;

		TUint8 byte1 = (TUint8)*aBytes;

		const TInt switchMask = 0x1;

		const TBool oneByteIndex =! (byte1 & switchMask);

		byte1 = TUint8(byte1 >> 1);

		if (oneByteIndex)

			{

			index = byte1;

			aBytes += 1;

			}

		else

			{

			const TUint8 byte2 = (TUint8)(*(aBytes + 1));

			index = byte1 + (byte2 * 128);

			aBytes += 2;

			}

		// Copy metric from table

		metrics =* iCharacterMetricsTable.Metric(index);

		}

	return metrics;

	}

void CFontBitmap::operator delete(TAny *aThis)

	{

	if (((CFontBitmap *)aThis)->iHeap)

		{

		((CFontBitmap *)aThis)->iHeap->Free(aThis);

		}

	}

void CFontBitmap::SetPosture(TFontPosture aPosture)

	{

	iPosture = (TInt8)aPosture;

	}

TFontPosture CFontBitmap::Posture() const

	{

	return (TFontPosture)iPosture;	 // iPosture is always smaller than TFontPosture

	}

void CFontBitmap::SetStrokeWeight(TFontStrokeWeight aStrokeWeight)

	{

	iStrokeWeight = (TInt8)aStrokeWeight;

	}

TFontStrokeWeight CFontBitmap::StrokeWeight() const

	{

	return (TFontStrokeWeight)iStrokeWeight;

	}

void CFontBitmap::SetIsProportional(TBool aIsProportional)

	{

	iIsProportional = (TInt8)aIsProportional;

	}

TBool CFontBitmap::IsProportional() const

	{

	return iIsProportional;

	}

CFontStoreFile* CFontBitmap::FontStoreFile() const

	{

	TInt fsf = TInt(this) + iFontStoreFileOffset;

	return (CFontStoreFile*)fsf;

	}

CFontBitmap::~CFontBitmap()

	{

	DeleteComponents();

	TBitmapCodeSection* codeSectionList = CodeSectionList();

	if(TUint32(this) != TUint32(codeSectionList))

		{

		iHeap->Free(codeSectionList);

		}

	iCodeSectionListOffset = 0;

	}

//We have to count how many offsets and bitmaps are allocated successfully because if

//some of codesection's Internalize..L fails we have to deallocate the right amount of