Parses an OpenTypeFont file and reads the Glyph Substitution Table. More...

Inheritance diagram for iText.IO.Font.Otf.GlyphSubstitutionTableReader:

Public Member Functions
	GlyphSubstitutionTableReader (RandomAccessFileOrArray rf, int gsubTableLocation, OpenTypeGdefTableReader gdef, IDictionary< int, Glyph > indexGlyphMap, int unitsPerEm)
	Instantiates a new instance of GlyphSubstitutionTableReader. More...

Public Member Functions inherited from iText.IO.Font.Otf.OpenTypeFontTableReader
virtual Glyph	GetGlyph (int index)
	Returns the glyph by index. More...

virtual OpenTableLookup	GetLookupTable (int idx)
	Returns the lookup table. More...

virtual IList< ScriptRecord >	GetScriptRecords ()
	Returns the script records. More...

virtual IList< FeatureRecord >	GetFeatureRecords ()
	Returns the feature records. More...

virtual IList< FeatureRecord >	GetFeatures (String[] scripts, String language)
	Returns the features represented by FeatureRecord list. More...

virtual IList< FeatureRecord >	GetSpecificFeatures (IList< FeatureRecord > features, String[] specific)
	Returns the specific features represented by FeatureRecord list. More...

virtual FeatureRecord	GetRequiredFeature (String[] scripts, String language)
	Returns the required feature represented by FeatureRecord. More...

virtual IList< OpenTableLookup >	GetLookups (FeatureRecord[] features)
	Returns the lookups. More...

virtual IList< OpenTableLookup >	GetLookups (FeatureRecord feature)
	Returns the lookups. More...

virtual bool	IsSkip (int glyph, int lookupFlag)
	Checks if lookup must ignore the specified glyph when processing glyph sequences. More...

virtual int	GetGlyphClass (int glyphCode)
	Returns the glyph class. More...

virtual int	GetUnitsPerEm ()
	Returns the units per em. More...

virtual LanguageRecord	GetLanguageRecord (String otfScriptTag)
	Returns the language record. More...

virtual LanguageRecord	GetLanguageRecord (String otfScriptTag, String langTag)
	Returns the language record. More...

Package Functions
override OpenTableLookup	ReadLookupTable (int lookupType, int lookupFlag, int[] subTableLocations)
	Reads the lookup table from OpenType data. More...

Package Functions inherited from iText.IO.Font.Otf.OpenTypeFontTableReader
	OpenTypeFontTableReader (RandomAccessFileOrArray rf, int tableLocation, OpenTypeGdefTableReader gdef, IDictionary< int, Glyph > indexGlyphMap, int unitsPerEm)
	Creates a new reader. More...

OtfClass	ReadClassDefinition (int classLocation)
	Reads the class definition from OpenType data. More...

int[]	ReadUShortArray (int size, int location)
	Reads the ushort array from OpenType data. More...

int[]	ReadUShortArray (int size)
	Reads the ushort array from OpenType data. More...

virtual void	ReadCoverages (int[] locations, IList< ICollection< int >> coverage)
	Reads the coverages from OpenType data. More...

IList< int >	ReadCoverageFormat (int coverageLocation)
	Reads the coverage format from OpenType data. More...

virtual SubstLookupRecord[]	ReadSubstLookupRecords (int substCount)
	Reads the substitution lookup records from OpenType data. More...

virtual PosLookupRecord[]	ReadPosLookupRecords (int substCount)
	Reads the positioning lookup records from OpenType data. More...

virtual TagAndLocation[]	ReadTagAndLocations (int baseLocation)
	Reads the tag and locations from OpenType data. More...

Additional Inherited Members
Package Attributes inherited from iText.IO.Font.Otf.OpenTypeFontTableReader
readonly RandomAccessFileOrArray	rf

readonly int	tableLocation
	Stores table location. More...

IList< OpenTableLookup >	lookupList
	Stores lookup list. More...

OpenTypeScript	scriptsType
	Stores scripts type. More...

OpenTypeFeature	featuresType
	Stores features type. More...

Detailed Description

Parses an OpenTypeFont file and reads the Glyph Substitution Table.

Parses an OpenTypeFont file and reads the Glyph Substitution Table. This table governs how two or more Glyphs should be merged to a single Glyph. This is especially useful for Asian languages like Bangla, Hindi, etc.

This has been written according to the OPenTypeFont specifications. See the OpenType GSUB table.

Constructor & Destructor Documentation

◆ GlyphSubstitutionTableReader()

iText.IO.Font.Otf.GlyphSubstitutionTableReader.GlyphSubstitutionTableReader	(	RandomAccessFileOrArray	rf,
		int	gsubTableLocation,
		OpenTypeGdefTableReader	gdef,
		IDictionary< int, Glyph >	indexGlyphMap,
		int	unitsPerEm
	)

inline

Instantiates a new instance of GlyphSubstitutionTableReader.

Parameters

rf	the `RandomAccessFileOrArray` containing the OpenType font
gsubTableLocation	the GSUB table location
gdef	the GDEF table reader
indexGlyphMap	the glyph index to glyph map
unitsPerEm	the `head.unitsPerEm` value from the OpenType font

Member Function Documentation

◆ ReadLookupTable()

override OpenTableLookup iText.IO.Font.Otf.GlyphSubstitutionTableReader.ReadLookupTable	(	int	lookupType,
		int	lookupFlag,
		int[]	subTableLocations
	)

inlinepackagevirtual

Reads the lookup table from OpenType data.

Parameters

lookupType	the lookup type
lookupFlag	specifies processing options, e.g. whether to skip base glyphs, marks or ligatures during glyph substitution or positioning. See Lookup table
subTableLocations	the sub table locations

Returns: the lookup table

Implements iText.IO.Font.Otf.OpenTypeFontTableReader.

Public Member Functions

Package Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ GlyphSubstitutionTableReader()

Member Function Documentation

◆ ReadLookupTable()