/*
 *  %W% %E%
 *
 * (C) Copyright IBM Corp. 1998 - All Rights Reserved
 *
 * Portions Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 *
 * The original version of this source code and documentation is
 * copyrighted and owned by IBM. These materials are provided
 * under terms of a License Agreement between IBM and Sun.
 * This technology is protected by multiple US and International
 * patents. This notice and attribution to IBM may not be removed.
 */

#ifndef __FONTOBJECT_H
#define __FONTOBJECT_H

#include <stdio.h>

#include "LETypes.h"


#ifndef ANY_NUMBER
#define ANY_NUMBER 1
#endif

struct DirectoryEntry
{
	le_uint32	tag;
	le_uint32	checksum;
	le_uint32	offset;
	le_uint32	length;
};

struct SFNTDirectory
{
	le_uint32		scalerType;
	le_uint16		numTables;
	le_uint16		searchRange;
	le_uint16		entrySelector;
	le_uint16		rangeShift;
	DirectoryEntry	tableDirectory[ANY_NUMBER];
};


struct CMAPEncodingSubtableHeader
{
	le_uint16	platformID;
	le_uint16	platformSpecificID;
	le_uint32	encodingOffset;
};

struct CMAPTable
{
	le_uint16	version;
	le_uint16	numberSubtables;
	CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER];
};

struct CMAPEncodingSubtable
{
	le_uint16	format;
	le_uint16	length;
	le_uint16	language;
};

struct CMAPFormat0Encoding : CMAPEncodingSubtable
{
	le_uint8	glyphIndexArray[256];
};

struct CMAPFormat2Subheader
{
	le_uint16	firstCode;
	le_uint16	entryCount;
	le_int16	idDelta;
	le_uint16	idRangeOffset;
};

struct CMAPFormat2Encoding : CMAPEncodingSubtable
{
	le_uint16  subHeadKeys[256];
	CMAPFormat2Subheader subheaders[ANY_NUMBER];
};

struct CMAPFormat4Encoding : CMAPEncodingSubtable
{
	le_uint16	segCountX2;
    le_uint16	searchRange;
    le_uint16	entrySelector;
    le_uint16	rangeShift;
    le_uint16	endCodes[ANY_NUMBER];
//  le_uint16	reservedPad;
//  le_uint16	startCodes[ANY_NUMBER];
//  le_uint16	idDelta[ANY_NUMBER];
//  le_uint16	idRangeOffset[ANY_NUMBER];
//  le_uint16	glyphIndexArray[ANY_NUMBER];
};

struct CMAPFormat6Encoding : CMAPEncodingSubtable
{
	le_uint16	firstCode;
    le_uint16	entryCount;
    le_uint16	glyphIndexArray[ANY_NUMBER];
};

typedef le_int32 fixed;

struct BigDate
{
	le_uint32 bc;
	le_uint32 ad;
};

struct HEADTable
{
	fixed		version;
	fixed		fontRevision;
	le_uint32	checksumAdjustment;
	le_uint32	magicNumber;
	le_uint16	flags;
	le_uint16	unitsPerEm;
	BigDate		created;
	BigDate		modified;
	le_int16	xMin;
	le_int16	yMin;
	le_int16	xMax;
	le_int16	yMax;
	le_int16	lowestRecPPEM;
	le_int16	fontDirectionHint;
	le_int16	indexToLocFormat;
	le_int16	glyphDataFormat;
};

struct MAXPTable
{
	fixed		version;
	le_uint16	numGlyphs;
	le_uint16	maxPoints;
	le_uint16	maxContours;
	le_uint16	maxComponentPoints;
	le_uint16	maxComponentContours;
	le_uint16	maxZones;
	le_uint16	maxTwilightPoints;
	le_uint16	maxStorage;
	le_uint16	maxFunctionDefs;
	le_uint16	maxInstructionDefs;
	le_uint16	maxStackElements;
	le_uint16	maxSizeOfInstructions;
	le_uint16	maxComponentElements;
	le_uint16	maxComponentDepth;
};

struct HHEATable
{
	fixed		version;
	le_int16	ascent;
	le_int16	descent;
	le_int16	lineGap;
	le_uint16	advanceWidthMax;
	le_int16	minLeftSideBearing;
	le_int16	minRightSideBearing;
	le_int16	xMaxExtent;
	le_int16	caretSlopeRise;
	le_int16	caretSlopeRun;
	le_int16	caretOffset;
	le_int16	reserved1;
	le_int16	reserved2;
	le_int16	reserved3;
	le_int16	reserved4;
	le_int16	metricDataFormat;
	le_uint16	numOfLongHorMetrics;
};

struct LongHorMetric
{
	le_uint16	advanceWidth;
	le_int16	leftSideBearing;
};

struct HMTXTable
{
	LongHorMetric hMetrics[ANY_NUMBER];        // ANY_NUMBER = numOfLongHorMetrics from hhea table
//	le_int16	  leftSideBearing[ANY_NUMBER]; // ANY_NUMBER = numGlyphs - numOfLongHorMetrics
};

class FontObject
{
public:
	FontObject(char *fontName);
	~FontObject();

	void *readTable(LETag tag, le_uint32 *length);
	void deleteTable(void *table);

	LEGlyphID unicodeToGlyph(LEUnicode32 unicode);

#if 0
	le_uint32 unicodesToGlyphs(LEUnicode *chars, le_uint32 nChars, LEGlyphID *glyphs,
        le_uint32 *charIndices, le_bool rightToLeft);
#endif

	le_uint16 getUnitsPerEM();

	le_uint16 getGlyphAdvance(LEGlyphID glyph);

private:
	FontObject();

	DirectoryEntry *findTable(LETag tag);
	CMAPEncodingSubtable *findCMAP(le_uint16 platformID, le_uint16 platformSpecificID);
	void initUnicodeCMAP();

	SFNTDirectory *directory;
	le_uint16 numTables;
	le_uint16 searchRange;
	le_uint16 entrySelector;
	le_uint16 rangeShift;

	CMAPTable *cmapTable;
	le_uint16 cmSegCount;
	le_uint16 cmSearchRange;
	le_uint16 cmEntrySelector;
	le_uint16 cmRangeShift;
	le_uint16 *cmEndCodes;
	le_uint16 *cmStartCodes;
	le_uint16 *cmIdDelta;
	le_uint16 *cmIdRangeOffset;

	HEADTable *headTable;

	HMTXTable *hmtxTable;
	le_uint16 numGlyphs;
	le_uint16 numOfLongHorMetrics;

	FILE *file;

};

#endif