/*

* Copyright (c) 1997-2007 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:

*

*/

EffRead::EffRead(fstream& aFile,FontCompiler& aFontCompiler,Fxf* aFxf,short int* aMapSpace):

	FontRead(aFile,aFontCompiler,aFxf),

	iMapSpace(aMapSpace)

	{}

int EffRead::ReadFont()

    {

	int count=0;

	int version=0;

	char* outbuffer[(MAX_CHAR_WID+7)>>3];

	int bitpos,len1,len2;

	int ReadSize,widToGo;

	int widthofi=0;

	int widthofM=0;

	FcmCharHead* pFxf;

	LetterTableData lettertabledata;

	LetterData letterdata;

	letterdata.blx = 0;

	letterdata.bly = 0;

	letterdata.rWid = 0;

	letterdata.rHgt = 0;

	int FileSize,FontNameOffs,VariousDataOffs,LetterOffs,LetterOffsBase,seekpos;

	unsigned short int* pDest;

	unsigned short int* pSrc;

	EffVariousData VariousData;

	char* inBuffer=new char[((MAX_CHAR_WID+7)>>3)*MAX_HEIGHT];

	if(!inBuffer) return(NoMemory);

	iInputFile.read((char*)&FileSize,4);

	iInputFile.read((char*)&FontNameOffs,4);

	iInputFile.read((char*)&VariousDataOffs,4);

	iInputFile.read((char*)&VariousDataOffs,4);

	iInputFile.read((char*)&LetterOffs,4);

	iInputFile.seekg(FontNameOffs);

	char tmpName[FONT_NAME_LEN+1];

	iInputFile.read(tmpName,FONT_NAME_LEN);

	tmpName[FONT_NAME_LEN]=0;

	strcpy(iFxf->name,tmpName);

	*(iFxf->typeface)=0;

	iInputFile.seekg(VariousDataOffs);

	iInputFile.read((char*)&VariousData,sizeof(VariousData));

	version=VariousData.version;

	if(version==0) version=1;

	if(version!=1 && version!=2) return(FileFormat);

	pFxf=new FcmCharHead[MAX_CHARS];

	for(count=0;count<sizeof(FcmCharHead)*MAX_CHARS;count++)

		((char*)pFxf)[count]=0;

	int offset=0;

	int first=1;

	LetterOffsBase=LetterOffs;

	iFxf->descent= -VariousData.bly;

	iFxf->UlinePos= -VariousData.UnderLinePos-VariousData.UnderLineThickness;

	iFxf->UlineThickness=VariousData.UnderLineThickness;

	iFxf->nominal_ascent=(VariousData.Hgt/*+VariousData.LineSpacing*/)-iFxf->descent;

	iFxf->MaxChrWidth=0;

	iFxf->cell_height=VariousData.Hgt;

	for(unsigned int chNum=0;chNum<MAX_CHARS;chNum++)

		{

		if(iMapSpace)

			iInputFile.seekg((*(iMapSpace+chNum)<<2)+LetterOffsBase);

		else

			iInputFile.seekg(LetterOffs);

		iInputFile.read((char*)&lettertabledata,sizeof(LetterTableData));

		if(version==1)

			{

			lettertabledata.width>>=4;

			iInputFile.read((char*)&letterdata,sizeof(LetterData));

			LetterOffs+=sizeof(LetterData);

			}

		LetterOffs+=sizeof(LetterTableData);

		iFxf->chr[chNum]=0;

// char 0 in EFF fonts have a garbage offset so ignore them.

//		if(letterdata.offset)

		if(lettertabledata.offset && chNum>0)

			{

			seekpos=LetterOffsBase+lettertabledata.offset;

			iInputFile.seekg(seekpos);

			if(version==2)

				iInputFile.read((char*)&letterdata,sizeof(LetterData));

			if(first)

				{

				iFxf->FirstChr=chNum;

				first=0;

				}

			iFxf->n_chars=chNum+1;

			iFxf->chr[chNum]=pFxf;

			pFxf->offset=offset;

			pFxf->xOffset=letterdata.blx;

			pFxf->yOffset=letterdata.rHgt+letterdata.bly;

			pFxf->width=letterdata.rWid;

			if(chNum=='i')

				widthofi=pFxf->width;

			if(chNum=='M')

				widthofM=pFxf->width;

			pFxf->ByteWid=((pFxf->width+15)>>3)&(~1);

			pFxf->height=letterdata.rHgt;

			pFxf->move=lettertabledata.width;

			int chWid=letterdata.rWid;

			if(chWid>iFxf->MaxChrWidth)

			    iFxf->MaxChrWidth=chWid;

			ReadSize=(letterdata.rWid*letterdata.rHgt+7)>>3;

			iInputFile.read(inBuffer,ReadSize);

			bitpos=0;

			pSrc=(unsigned short int*)inBuffer;

			for(int i=0;i<letterdata.rHgt;i++)

			    {

			    pDest=(unsigned short int*)outbuffer;

			    for(int j=0;j<pFxf->ByteWid;j+=2)

			        {

			        len1=16-bitpos;

			        *pDest=(unsigned short int)((*pSrc)>>bitpos);

			        widToGo=letterdata.rWid-(j<<3);

			        if (len1>widToGo)

			            {

			            len1=widToGo;

			            len2=0;

			            }

			        else

			            {

			            pSrc++;

			            if ((len1+bitpos)>widToGo)

			                len2=widToGo-len1;

			            else

			                len2=bitpos;

			            if (len2)

			                *pDest|= (*pSrc)<<(16-bitpos);

			            }

			        *pDest&=0xFFFF>>(16-len2-len1);

			        bitpos=(bitpos+len1+len2)&0xF;

			        pDest++;

			        }

				memcpy(iFontCompiler->FontStore()+offset+pFxf->ByteWid*(letterdata.rHgt-i-1),outbuffer,pFxf->ByteWid);

			    }

			offset+=pFxf->ByteWid*letterdata.rHgt;

			}

        pFxf++;

        }

	if(widthofi && widthofM)

		iFxf->iProportional=(widthofi!=widthofM);

	return(NoError);

    }