com.lowagie.text.pdf
Class TrueTypeFontSubSet

java.lang.Object
  com.lowagie.text.pdf.TrueTypeFontSubSet

 class TrueTypeFontSubSet
extends Object

Subsets a True Type font by removing the unneeded glyphs from the font.

Author:

Paulo Soares (psoares@consiste.pt)

Field Summary

(package private) static int	ARG_1_AND_2_ARE_WORDS
protected int	directoryOffset
(package private) static int[]	entrySelectors
protected String	fileName The file name.
protected int	fontPtr
protected int	glyfTableRealSize
protected ArrayList	glyphsInList
protected HashMap	glyphsUsed
(package private) static int	HEAD_LOCA_FORMAT_OFFSET
protected boolean	includeCmap
protected boolean	includeExtras
protected boolean	locaShortTable
protected int[]	locaTable
protected int	locaTableRealSize
(package private) static int	MORE_COMPONENTS
protected byte[]	newGlyfTable
protected int[]	newLocaTable
protected byte[]	newLocaTableOut
protected byte[]	outFont
protected RandomAccessFileOrArray	rf The file in use.
(package private) static int	TABLE_CHECKSUM
(package private) static int	TABLE_LENGTH
(package private) static int	TABLE_OFFSET
protected HashMap	tableDirectory Contains the location of the several tables.
protected int	tableGlyphOffset
(package private) static String[]	tableNamesCmap
(package private) static String[]	tableNamesExtra
(package private) static String[]	tableNamesSimple
(package private) static int	WE_HAVE_A_SCALE
(package private) static int	WE_HAVE_A_TWO_BY_TWO
(package private) static int	WE_HAVE_AN_X_AND_Y_SCALE

Constructor Summary

TrueTypeFontSubSet(String fileName, RandomAccessFileOrArray rf, HashMap glyphsUsed, int directoryOffset, boolean includeCmap, boolean includeExtras)
Creates a new TrueTypeFontSubSet

Method Summary

protected void	assembleFont()
protected int	calculateChecksum(byte[] b)
protected void	checkGlyphComposite(int glyph)
protected void	createNewGlyphTables()
protected void	createTableDirectory()
protected void	flatGlyphs()
protected void	locaTobytes()
(package private) byte[]	process() Does the actual work of subsetting the font.
protected void	readLoca()
protected String	readStandardString(int length) Reads a String from the font file as bytes using the Cp1252 encoding.
protected void	writeFontInt(int n)
protected void	writeFontShort(int n)
protected void	writeFontString(String s)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tableNamesSimple

static final String[] tableNamesSimple

tableNamesCmap

static final String[] tableNamesCmap

tableNamesExtra

static final String[] tableNamesExtra

entrySelectors

static final int[] entrySelectors

TABLE_CHECKSUM

static final int TABLE_CHECKSUM

See Also:

Constant Field Values

TABLE_OFFSET

static final int TABLE_OFFSET

See Also:

Constant Field Values

TABLE_LENGTH

static final int TABLE_LENGTH

See Also:

Constant Field Values

HEAD_LOCA_FORMAT_OFFSET

static final int HEAD_LOCA_FORMAT_OFFSET

See Also:

Constant Field Values

ARG_1_AND_2_ARE_WORDS

static final int ARG_1_AND_2_ARE_WORDS

See Also:

Constant Field Values

WE_HAVE_A_SCALE

static final int WE_HAVE_A_SCALE

See Also:

Constant Field Values

MORE_COMPONENTS

static final int MORE_COMPONENTS

See Also:

Constant Field Values

WE_HAVE_AN_X_AND_Y_SCALE

static final int WE_HAVE_AN_X_AND_Y_SCALE

See Also:

Constant Field Values

WE_HAVE_A_TWO_BY_TWO

static final int WE_HAVE_A_TWO_BY_TWO

See Also:

Constant Field Values

tableDirectory

protected HashMap tableDirectory

Contains the location of the several tables. The key is the name of the table and the value is an int[3] where position 0 is the checksum, position 1 is the offset from the start of the file and position 2 is the length of the table.

rf

protected RandomAccessFileOrArray rf

The file in use.

fileName

protected String fileName

The file name.

includeCmap

protected boolean includeCmap

includeExtras

protected boolean includeExtras

locaShortTable

protected boolean locaShortTable

locaTable

protected int[] locaTable

glyphsUsed

protected HashMap glyphsUsed

glyphsInList

protected ArrayList glyphsInList

tableGlyphOffset

protected int tableGlyphOffset

newLocaTable

protected int[] newLocaTable

newLocaTableOut

protected byte[] newLocaTableOut

newGlyfTable

protected byte[] newGlyfTable

glyfTableRealSize

protected int glyfTableRealSize

locaTableRealSize

protected int locaTableRealSize

outFont

protected byte[] outFont

fontPtr

protected int fontPtr

directoryOffset

protected int directoryOffset

Constructor Detail

TrueTypeFontSubSet

TrueTypeFontSubSet(String fileName,
                   RandomAccessFileOrArray rf,
                   HashMap glyphsUsed,
                   int directoryOffset,
                   boolean includeCmap,
                   boolean includeExtras)

Creates a new TrueTypeFontSubSet

Parameters:

directoryOffset - The offset from the start of the file to the table directory

fileName - the file name of the font

glyphsUsed - the glyphs used

includeCmap - true if the table cmap is to be included in the generated font

Method Detail

process

byte[] process()
         throws IOException,
                DocumentException

Does the actual work of subsetting the font.

Returns:

the subset font

Throws:

IOException - on error

DocumentException - on error

assembleFont

protected void assembleFont()
                     throws IOException

Throws:

IOException

createTableDirectory

protected void createTableDirectory()
                             throws IOException,
                                    DocumentException

Throws:

IOException

DocumentException

readLoca

protected void readLoca()
                 throws IOException,
                        DocumentException

Throws:

IOException

DocumentException

createNewGlyphTables

protected void createNewGlyphTables()
                             throws IOException

Throws:

IOException

locaTobytes

protected void locaTobytes()

flatGlyphs

protected void flatGlyphs()
                   throws IOException,
                          DocumentException

Throws:

IOException

DocumentException

checkGlyphComposite

protected void checkGlyphComposite(int glyph)
                            throws IOException

Throws:

IOException

readStandardString

protected String readStandardString(int length)
                             throws IOException

Reads a String from the font file as bytes using the Cp1252 encoding.

Parameters:

length - the length of bytes to read

Returns:

the String read

Throws:

IOException - the font file could not be read

writeFontShort

protected void writeFontShort(int n)

writeFontInt

protected void writeFontInt(int n)

writeFontString

protected void writeFontString(String s)

calculateChecksum

protected int calculateChecksum(byte[] b)