/***************************************************************************

*

*   Copyright (C) 1998-2002, International Business Machines

*   Corporation and others.  All Rights Reserved.

*

************************************************************************/

#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