A Lookup table defines the specific conditions, type, and results of substitution or positioning actions that are used to implement a feature. More...

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

Classes
class	GlyphIndexer
	Utility class to iterate over GlyphLine. More...

Public Member Functions
virtual int	GetLookupFlag ()
	Gets the lookup flag. More...

abstract bool	TransformOne (GlyphLine line)
	Apply transformation to only one glyph from the glyph line. More...

virtual bool	TransformLine (GlyphLine line)
	Apply transformation to the glyph line. More...

virtual bool	HasSubstitution (int index)
	Checks whether there is a substitution (replacement) for the specified index in `this` lookup table. More...

virtual int	GetIndexInLookupList ()
	Gets `this` lookup table index in the LookupList. More...

virtual void	SetIndexInLookupList (int indexInLookupList)
	Sets lookup table index in the LookupList. More...

Package Functions
	OpenTableLookup (OpenTypeFontTableReader openReader, int lookupFlag, int[] subTableLocations)
	Instantiates a new instance of OpenTableLookup. More...

virtual void	ReadSubTables ()
	Reads subtables. More...

abstract void	ReadSubTable (int subTableLocation)
	Reads subtable from the specified location. More...

Package Attributes
int	lookupFlag
	Indicates to a text-processing client certain processing options to use when substituting or positioning glyphs. More...

int[]	subTableLocations
	Subtables locations. More...

OpenTypeFontTableReader	openReader
	OpenType font table reader. More...

Detailed Description

A Lookup table defines the specific conditions, type, and results of substitution or positioning actions that are used to implement a feature.

The data describing the actions of a lookup are contained in one or more lookup subtables. Different lookup types support different types of operation; for example, positioning adjustment on a single glyph versus positioning adjustments on pairs of glyphs.

For more information see Lookup table

Constructor & Destructor Documentation

◆ OpenTableLookup()

iText.IO.Font.Otf.OpenTableLookup.OpenTableLookup	(	OpenTypeFontTableReader	openReader,
		int	lookupFlag,
		int[]	subTableLocations
	)

inlinepackage

Instantiates a new instance of OpenTableLookup.

Parameters

openReader	the OpenType font table reader
lookupFlag	specifies processing options, e.g. whether to skip base glyphs, marks or ligatures during glyph substitution or positioning. See Lookup table
subTableLocations	the subtables locations

Member Function Documentation

◆ GetIndexInLookupList()

virtual int iText.IO.Font.Otf.OpenTableLookup.GetIndexInLookupList ( )

inlinevirtual

Gets this lookup table index in the LookupList.

Returns: the table index in the LookupList

◆ GetLookupFlag()

virtual int iText.IO.Font.Otf.OpenTableLookup.GetLookupFlag ( )

inlinevirtual

Gets the lookup flag.

The flag indicates to a text-processing client certain processing options to use when substituting or positioning glyphs. e.g. whether to skip base glyphs, marks or ligatures during glyph substitution or positioning. See Lookup table

Returns: the lookup flag

◆ HasSubstitution()

virtual bool iText.IO.Font.Otf.OpenTableLookup.HasSubstitution ( int index )

inlinevirtual

Checks whether there is a substitution (replacement) for the specified index in this lookup table.

Parameters

index the index to check for a substitution

Returns

true if there is substitution, false otherwise

Reimplemented in iText.IO.Font.Otf.GsubLookupType1, iText.IO.Font.Otf.GsubLookupType2, and iText.IO.Font.Otf.GsubLookupType3.

◆ ReadSubTable()

abstract void iText.IO.Font.Otf.OpenTableLookup.ReadSubTable ( int subTableLocation )

packagepure virtual

Reads subtable from the specified location.

Parameters

subTableLocation the subtable location

Implemented in iText.IO.Font.Otf.GposLookupType5, iText.IO.Font.Otf.GposLookupType6, iText.IO.Font.Otf.GposLookupType4, iText.IO.Font.Otf.GposLookupType7, iText.IO.Font.Otf.GsubLookupType4, iText.IO.Font.Otf.GsubLookupType5, iText.IO.Font.Otf.GposLookupType1, iText.IO.Font.Otf.GsubLookupType2, iText.IO.Font.Otf.GposLookupType2, iText.IO.Font.Otf.GsubLookupType1, iText.IO.Font.Otf.GsubLookupType3, and iText.IO.Font.Otf.GposLookupType8.

◆ ReadSubTables()

virtual void iText.IO.Font.Otf.OpenTableLookup.ReadSubTables ( )

inlinepackagevirtual

Reads subtables.

◆ SetIndexInLookupList()

virtual void iText.IO.Font.Otf.OpenTableLookup.SetIndexInLookupList ( int indexInLookupList )

inlinevirtual

Sets lookup table index in the LookupList.

Parameters

indexInLookupList the table index in the LookupList

◆ TransformLine()

virtual bool iText.IO.Font.Otf.OpenTableLookup.TransformLine ( GlyphLine line )

inlinevirtual

Apply transformation to the glyph line.

Parameters

line	the glyph line to transform

Returns

true if transformation was applied, false otherwise

◆ TransformOne()

abstract bool iText.IO.Font.Otf.OpenTableLookup.TransformOne ( GlyphLine line )

pure virtual

Apply transformation to only one glyph from the glyph line.

Parameters

line	the glyph line to transform

Returns

true if transformation was applied, false otherwise

Implemented in iText.IO.Font.Otf.GposLookupType7, iText.IO.Font.Otf.GsubLookupType4, iText.IO.Font.Otf.GsubLookupType5, iText.IO.Font.Otf.GposLookupType4, iText.IO.Font.Otf.GposLookupType5, iText.IO.Font.Otf.GposLookupType6, iText.IO.Font.Otf.GposLookupType2, iText.IO.Font.Otf.GsubLookupType1, iText.IO.Font.Otf.GsubLookupType2, iText.IO.Font.Otf.GposLookupType1, and iText.IO.Font.Otf.GsubLookupType3.

Member Data Documentation

◆ lookupFlag

int iText.IO.Font.Otf.OpenTableLookup.lookupFlag

package

Indicates to a text-processing client certain processing options to use when substituting or positioning glyphs.

◆ openReader

OpenTypeFontTableReader iText.IO.Font.Otf.OpenTableLookup.openReader

package

OpenType font table reader.

◆ subTableLocations

int [] iText.IO.Font.Otf.OpenTableLookup.subTableLocations

package

Subtables locations.

Classes

Public Member Functions

Package Functions

Package Attributes

Detailed Description

Constructor & Destructor Documentation

◆ OpenTableLookup()

Member Function Documentation

◆ GetIndexInLookupList()

◆ GetLookupFlag()

◆ HasSubstitution()

◆ ReadSubTable()

◆ ReadSubTables()

◆ SetIndexInLookupList()

◆ TransformLine()

◆ TransformOne()

Member Data Documentation

◆ lookupFlag

◆ openReader

◆ subTableLocations