This Class subsets a CFF Type Font. More...

Inheritance diagram for iText.IO.Font.CFFFontSubset:

Public Member Functions
	CFFFontSubset (byte[] cff, ICollection< int > GlyphsUsed)

virtual byte[]	Process (String fontName)
	The Process function extracts one font out of the CFF file and returns a subset version of the original. More...

virtual byte[]	Process ()
	The Process function extracts one font out of the CFF file and returns a subset version of the original with the first name. More...

Public Member Functions inherited from iText.IO.Font.CFFFont
virtual String	GetString (char sid)

virtual byte[]	GetCID (String fontName)
	get a single CID font. More...

virtual bool	IsCID ()

virtual bool	IsCID (String fontName)

virtual bool	Exists (String fontName)

virtual String[]	GetNames ()

	CFFFont (byte[] cff)

Package Functions
virtual void	ReadFDSelect (int Font)
	Read the FDSelect of the font and compute the array and its length More...

virtual void	BuildFDArrayUsed (int Font)
	Function reads the FDSelect and builds the FDArrayUsed Map According to the glyphs used More...

virtual void	ReadFDArray (int Font)
	Read the FDArray count, offsize and Offset array More...

virtual int	CalcBias (int Offset, int Font)
	Function calcs bias according to the CharString type and the count of the subrs More...

virtual void	BuildNewCharString (int FontIndex)
	Function uses BuildNewIndex to create the new index of the subset charstrings. More...

virtual void	BuildNewLGSubrs (int Font)
	Function builds the new local and global subsrs indices. More...

virtual void	BuildFDSubrsOffsets (int Font, int FD)
	The function finds for the FD array processed the local subr offset and its offset array. More...

virtual void	BuildSubrUsed (int Font, int FD, int SubrOffset, int[] SubrsOffsets, ICollection< int > hSubr, IList< int > lSubr)
	Function uses ReadAsubr on the glyph used to build the LSubr and Gsubr Map. More...

virtual void	BuildGSubrsUsed (int Font)
	Function scans the Glsubr used list to find recursive calls to Gsubrs and adds to Map and list More...

virtual void	ReadASubr (int begin, int end, int GBias, int LBias, ICollection< int > hSubr, IList< int > lSubr, int[] LSubrsOffsets)
	The function reads a subrs (glyph info) between begin and end. More...

virtual void	HandelStack ()
	Function Checks how the current operator effects the run time stack after being run An operator may increase or decrease the stack size More...

virtual int	StackOpp ()
	Function checks the key and return the change to the stack after the operator More...

virtual void	EmptyStack ()
	Empty the Type2 Stack More...

virtual void	PopStack ()
	Pop one element from the stack More...

virtual void	PushStack ()
	Add an item to the stack More...

virtual void	ReadCommand ()
	The function reads the next command after the file pointer is set More...

virtual int	CalcHints (int begin, int end, int LBias, int GBias, int[] LSubrsOffsets)
	The function reads the subroutine and returns the number of the hint in it. More...

virtual byte[]	BuildNewIndex (int[] Offsets, ICollection< int > Used, byte OperatorForUnusedEntries)
	Function builds the new offset array, object array and assembles the index. More...

virtual byte[]	BuildNewIndexAndCopyAllGSubrs (int[] Offsets, byte OperatorForUnusedEntries)
	Function builds the new offset array, object array and assembles the index. More...

virtual byte[]	AssembleIndex (int[] NewOffsets, byte[] NewObjects)
	Function creates the new index, inserting the count,offsetsize,offset array and object array. More...

virtual byte[]	BuildNewFile (int Font)
	The function builds the new output stream according to the subset process More...

virtual void	CopyHeader ()
	Function Copies the header from the original fileto the output list More...

virtual void	BuildIndexHeader (int Count, int Offsize, int First)
	Function Build the header of an index More...

virtual void	CreateKeys (CFFFont.OffsetItem fdarrayRef, CFFFont.OffsetItem fdselectRef, CFFFont.OffsetItem charsetRef, CFFFont.OffsetItem charstringsRef)
	Function adds the keys into the TopDict More...

virtual void	CreateNewStringIndex (int Font)
	Function takes the original string item and adds the new strings to accommodate the CID rules More...

virtual void	CreateFDSelect (CFFFont.OffsetItem fdselectRef, int nglyphs)
	Function creates new FDSelect for non-CID fonts. More...

virtual void	CreateCharset (CFFFont.OffsetItem charsetRef, int nglyphs)
	Function creates new CharSet for non-CID fonts. More...

virtual void	CreateFDArray (CFFFont.OffsetItem fdarrayRef, CFFFont.OffsetItem privateRef, int Font)
	Function creates new FDArray for non-CID fonts. More...

virtual int	CountEntireIndexRange (int indexOffset)
	Function computes the size of an index More...

Package Functions inherited from iText.IO.Font.CFFFont
virtual void	GetDictItem ()

virtual CFFFont.RangeItem	GetEntireIndexRange (int indexOffset)
	a utility that creates a range item for an entire index More...

Additional Inherited Members
Package Attributes inherited from iText.IO.Font.CFFFont
String	key

Object[]	args = new Object[48]

int	arg_count = 0

RandomAccessFileOrArray	buf
	A random Access File or an array More...

int	nameIndexOffset

int	topdictIndexOffset

int	stringIndexOffset

int	gsubrIndexOffset

int[]	nameOffsets

int[]	topdictOffsets

int[]	stringOffsets

int[]	gsubrOffsets

CFFFont.Font[]	fonts

Detailed Description

This Class subsets a CFF Type Font.

This Class subsets a CFF Type Font. The subset is preformed for CID fonts and NON CID fonts. The Charstring is subsetted for both types. For CID fonts only the FDArray which are used are embedded. The Lsubroutines of the FDArrays used are subsetted as well. The Subroutine subset supports both Type1 and Type2 formatting although only tested on Type2 Format. For Non CID the Lsubroutines are subsetted. On both types the Gsubroutines is subsetted. A font which was not of CID type is transformed into CID as a part of the subset process. The CID synthetic creation was written by Sivan Toledo (sivan.nosp@m.@mat.nosp@m.h.tau.nosp@m..ac..nosp@m.il)

Member Function Documentation

◆ AssembleIndex()

virtual byte [] iText.IO.Font.CFFFontSubset.AssembleIndex	(	int[]	NewOffsets,
		byte[]	NewObjects
	)

inlinepackagevirtual

Function creates the new index, inserting the count,offsetsize,offset array and object array.

Parameters

NewOffsets	the subsetted offset array
NewObjects	the subsetted object array

Returns: the new index created

◆ BuildFDArrayUsed()

virtual void iText.IO.Font.CFFFontSubset.BuildFDArrayUsed ( int Font )

inlinepackagevirtual

Function reads the FDSelect and builds the FDArrayUsed Map According to the glyphs used

Parameters

Font	the Number of font being processed

◆ BuildFDSubrsOffsets()

virtual void iText.IO.Font.CFFFontSubset.BuildFDSubrsOffsets	(	int	Font,
		int	FD
	)

inlinepackagevirtual

The function finds for the FD array processed the local subr offset and its offset array.

Parameters

Font	the font
FD	The FDARRAY processed

◆ BuildGSubrsUsed()

virtual void iText.IO.Font.CFFFontSubset.BuildGSubrsUsed ( int Font )

inlinepackagevirtual

Function scans the Glsubr used list to find recursive calls to Gsubrs and adds to Map and list

Parameters

Font the font

◆ BuildIndexHeader()

virtual void iText.IO.Font.CFFFontSubset.BuildIndexHeader	(	int	Count,
		int	Offsize,
		int	First
	)

inlinepackagevirtual

Function Build the header of an index

Parameters

Count	the count field of the index
Offsize	the offsize field of the index
First	the first offset of the index

◆ BuildNewCharString()

virtual void iText.IO.Font.CFFFontSubset.BuildNewCharString ( int FontIndex )

inlinepackagevirtual

Function uses BuildNewIndex to create the new index of the subset charstrings.

Parameters

FontIndex the font

◆ BuildNewFile()

virtual byte [] iText.IO.Font.CFFFontSubset.BuildNewFile ( int Font )

inlinepackagevirtual

The function builds the new output stream according to the subset process

Parameters

Font the font

Returns: the subsetted font stream

◆ BuildNewIndex()

virtual byte [] iText.IO.Font.CFFFontSubset.BuildNewIndex	(	int[]	Offsets,
		ICollection< int >	Used,
		byte	OperatorForUnusedEntries
	)

inlinepackagevirtual

Function builds the new offset array, object array and assembles the index.

Function builds the new offset array, object array and assembles the index. used for creating the glyph and subrs subsetted index

Parameters

Offsets	the offset array of the original index
Used	the Map of the used objects
OperatorForUnusedEntries	the operator inserted into the data stream for unused entries

Returns: the new index subset version

◆ BuildNewIndexAndCopyAllGSubrs()

virtual byte [] iText.IO.Font.CFFFontSubset.BuildNewIndexAndCopyAllGSubrs	(	int[]	Offsets,
		byte	OperatorForUnusedEntries
	)

inlinepackagevirtual

Function builds the new offset array, object array and assembles the index.

Function builds the new offset array, object array and assembles the index. used for creating the glyph and subrs subsetted index

Parameters

Offsets	the offset array of the original index
OperatorForUnusedEntries	the operator inserted into the data stream for unused entries

Returns: the new index subset version

◆ BuildNewLGSubrs()

virtual void iText.IO.Font.CFFFontSubset.BuildNewLGSubrs ( int Font )

inlinepackagevirtual

Function builds the new local and global subsrs indices.

Function builds the new local and global subsrs indices. IF CID then All of the FD Array lsubrs will be subsetted.

Parameters

Font the font

◆ BuildSubrUsed()

virtual void iText.IO.Font.CFFFontSubset.BuildSubrUsed	(	int	Font,
		int	FD,
		int	SubrOffset,
		int[]	SubrsOffsets,
		ICollection< int >	hSubr,
		IList< int >	lSubr
	)

inlinepackagevirtual

Function uses ReadAsubr on the glyph used to build the LSubr and Gsubr Map.

Function uses ReadAsubr on the glyph used to build the LSubr and Gsubr Map. The Map (of the lsubr only) is then scanned recursively for Lsubr and Gsubrs calls.

Parameters

Font	the font
FD	FD array processed. 0 indicates function was called by non CID font
SubrOffset	the offset to the subr index to calc the bias
SubrsOffsets	the offset array of the subr index
hSubr	Map of the subrs used
lSubr	list of the subrs used

◆ CalcBias()

virtual int iText.IO.Font.CFFFontSubset.CalcBias	(	int	Offset,
		int	Font
	)

inlinepackagevirtual

Function calcs bias according to the CharString type and the count of the subrs

Parameters

Offset	The offset to the relevant subrs index
Font	the font

Returns: The calculated Bias

◆ CalcHints()

virtual int iText.IO.Font.CFFFontSubset.CalcHints	(	int	begin,
		int	end,
		int	LBias,
		int	GBias,
		int[]	LSubrsOffsets
	)

inlinepackagevirtual

The function reads the subroutine and returns the number of the hint in it.

The function reads the subroutine and returns the number of the hint in it. If a call to another subroutine is found the function calls recursively.

Parameters

begin	the start point of the subr
end	the end point of the subr
LBias	the bias of the Local Subrs
GBias	the bias of the Global Subrs
LSubrsOffsets	The Offsets array of the subroutines

Returns: The number of hints in the subroutine read.

◆ CopyHeader()

virtual void iText.IO.Font.CFFFontSubset.CopyHeader ( )

inlinepackagevirtual

Function Copies the header from the original fileto the output list

◆ CountEntireIndexRange()

virtual int iText.IO.Font.CFFFontSubset.CountEntireIndexRange ( int indexOffset )

inlinepackagevirtual

Function computes the size of an index

Parameters

indexOffset The offset for the computed index

Returns: The size of the index

◆ CreateCharset()

virtual void iText.IO.Font.CFFFontSubset.CreateCharset	(	CFFFont.OffsetItem	charsetRef,
		int	nglyphs
	)

inlinepackagevirtual

Function creates new CharSet for non-CID fonts.

Function creates new CharSet for non-CID fonts. The CharSet built uses a single range for all glyphs

Parameters

charsetRef	OffsetItem for the CharSet
nglyphs	the number of glyphs in the font

◆ CreateFDArray()

virtual void iText.IO.Font.CFFFontSubset.CreateFDArray	(	CFFFont.OffsetItem	fdarrayRef,
		CFFFont.OffsetItem	privateRef,
		int	Font
	)

inlinepackagevirtual

Function creates new FDArray for non-CID fonts.

Function creates new FDArray for non-CID fonts. The FDArray built has only the "Private" operator that points to the font's original private dict

Parameters

fdarrayRef	OffsetItem for the FDArray
privateRef	OffsetItem for the Private Dict
Font	the font

◆ CreateFDSelect()

virtual void iText.IO.Font.CFFFontSubset.CreateFDSelect	(	CFFFont.OffsetItem	fdselectRef,
		int	nglyphs
	)

inlinepackagevirtual

Function creates new FDSelect for non-CID fonts.

Function creates new FDSelect for non-CID fonts. The FDSelect built uses a single range for all glyphs

Parameters

fdselectRef	OffsetItem for the FDSelect
nglyphs	the number of glyphs in the font

◆ CreateKeys()

virtual void iText.IO.Font.CFFFontSubset.CreateKeys	(	CFFFont.OffsetItem	fdarrayRef,
		CFFFont.OffsetItem	fdselectRef,
		CFFFont.OffsetItem	charsetRef,
		CFFFont.OffsetItem	charstringsRef
	)

inlinepackagevirtual

Function adds the keys into the TopDict

Parameters

fdarrayRef	OffsetItem for the FDArray
fdselectRef	OffsetItem for the FDSelect
charsetRef	OffsetItem for the CharSet
charstringsRef	OffsetItem for the CharString

◆ CreateNewStringIndex()

virtual void iText.IO.Font.CFFFontSubset.CreateNewStringIndex ( int Font )

inlinepackagevirtual

Function takes the original string item and adds the new strings to accommodate the CID rules

Parameters

Font the font

◆ EmptyStack()

virtual void iText.IO.Font.CFFFontSubset.EmptyStack ( )

inlinepackagevirtual

Empty the Type2 Stack

◆ HandelStack()

virtual void iText.IO.Font.CFFFontSubset.HandelStack ( )

inlinepackagevirtual

Function Checks how the current operator effects the run time stack after being run An operator may increase or decrease the stack size

◆ PopStack()

virtual void iText.IO.Font.CFFFontSubset.PopStack ( )

inlinepackagevirtual

Pop one element from the stack

◆ Process() [1/2]

virtual byte [] iText.IO.Font.CFFFontSubset.Process ( )

inlinevirtual

The Process function extracts one font out of the CFF file and returns a subset version of the original with the first name.

Returns: The new font stream

◆ Process() [2/2]

virtual byte [] iText.IO.Font.CFFFontSubset.Process ( String fontName )

inlinevirtual

The Process function extracts one font out of the CFF file and returns a subset version of the original.

Parameters

fontName - The name of the font to be taken out of the CFF

Returns: The new font stream

◆ PushStack()

virtual void iText.IO.Font.CFFFontSubset.PushStack ( )

inlinepackagevirtual

Add an item to the stack

◆ ReadASubr()

virtual void iText.IO.Font.CFFFontSubset.ReadASubr	(	int	begin,
		int	end,
		int	GBias,
		int	LBias,
		ICollection< int >	hSubr,
		IList< int >	lSubr,
		int[]	LSubrsOffsets
	)

inlinepackagevirtual

The function reads a subrs (glyph info) between begin and end.

The function reads a subrs (glyph info) between begin and end. Adds calls to a Lsubr to the hSubr and lSubrs. Adds calls to a Gsubr to the hGSubr and lGSubrs.

Parameters

begin	the start point of the subr
end	the end point of the subr
GBias	the bias of the Global Subrs
LBias	the bias of the Local Subrs
hSubr	the subroutines used as set
lSubr	the subroutines used as list
LSubrsOffsets	the offsets array of the subroutines

◆ ReadCommand()

virtual void iText.IO.Font.CFFFontSubset.ReadCommand ( )

inlinepackagevirtual

The function reads the next command after the file pointer is set

◆ ReadFDArray()

virtual void iText.IO.Font.CFFFontSubset.ReadFDArray ( int Font )

inlinepackagevirtual

Read the FDArray count, offsize and Offset array

Parameters

Font	the Number of font being processed

◆ ReadFDSelect()

virtual void iText.IO.Font.CFFFontSubset.ReadFDSelect ( int Font )

inlinepackagevirtual

Read the FDSelect of the font and compute the array and its length

Parameters

Font	The index of the font being processed

◆ StackOpp()

virtual int iText.IO.Font.CFFFontSubset.StackOpp ( )

inlinepackagevirtual

Function checks the key and return the change to the stack after the operator

Returns: The change in the stack. 2-> flush the stack

Public Member Functions

Package Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ AssembleIndex()

◆ BuildFDArrayUsed()

◆ BuildFDSubrsOffsets()

◆ BuildGSubrsUsed()

◆ BuildIndexHeader()

◆ BuildNewCharString()

◆ BuildNewFile()

◆ BuildNewIndex()

◆ BuildNewIndexAndCopyAllGSubrs()

◆ BuildNewLGSubrs()

◆ BuildSubrUsed()

◆ CalcBias()

◆ CalcHints()

◆ CopyHeader()

◆ CountEntireIndexRange()

◆ CreateCharset()

◆ CreateFDArray()

◆ CreateFDSelect()

◆ CreateKeys()

◆ CreateNewStringIndex()

◆ EmptyStack()

◆ HandelStack()

◆ PopStack()

◆ Process() [1/2]

◆ Process() [2/2]

◆ PushStack()

◆ ReadASubr()

◆ ReadCommand()

◆ ReadFDArray()

◆ ReadFDSelect()

◆ StackOpp()