org.apache.fontbox.ttf

Class KerningSubtable

java.lang.Object

org.apache.fontbox.ttf.KerningSubtable

public class KerningSubtable
extends Object

A 'kern' table in a true type font.

Author:

Glenn Adams

Method Summary

Modifier and Type	Method and Description
int[]	getKerning(int[] glyphs) Obtain kerning adjustments for GLYPHS sequence, where the Nth returned adjustment is associated with the Nth glyph and the succeeding non-zero glyph in the GLYPHS sequence.
int	getKerning(int l, int r) Obtain kerning adjustment for glyph pair {L,R}.
boolean	isHorizontalKerning() Determine if subtable is designated for use in horizontal writing modes and contains inline progression kerning pairs (not block progression "cross stream") kerning pairs.
boolean	isHorizontalKerning(boolean cross) Determine if subtable is designated for use in horizontal writing modes, contains kerning pairs (as opposed to minimum pairs), and, if CROSS is true, then return cross stream designator; otherwise, if CROSS is false, return true if cross stream designator is false.
void	read(org.apache.fontbox.ttf.TTFDataStream data, int version) This will read the required data from the stream.

Methods inherited from class java.lang.Object

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

Method Detail

read

public void read(org.apache.fontbox.ttf.TTFDataStream data,
                 int version)
          throws IOException

This will read the required data from the stream.

Parameters:

data - The stream to read the data from.

version - The version of the table to be read

Throws:

IOException - If there is an error reading the data.

isHorizontalKerning

public boolean isHorizontalKerning()

Determine if subtable is designated for use in horizontal writing modes and contains inline progression kerning pairs (not block progression "cross stream") kerning pairs.

Returns:

true if subtable is for horizontal kerning

isHorizontalKerning

public boolean isHorizontalKerning(boolean cross)

Determine if subtable is designated for use in horizontal writing modes, contains kerning pairs (as opposed to minimum pairs), and, if CROSS is true, then return cross stream designator; otherwise, if CROSS is false, return true if cross stream designator is false.

Parameters:

cross - if true, then return cross stream designator in horizontal modes

Returns:

true if subtable is for horizontal kerning in horizontal modes

getKerning

public int[] getKerning(int[] glyphs)

Obtain kerning adjustments for GLYPHS sequence, where the Nth returned adjustment is associated with the Nth glyph and the succeeding non-zero glyph in the GLYPHS sequence. Kerning adjustments are returned in font design coordinates.

Parameters:

glyphs - a (possibly empty) array of glyph identifiers

Returns:

a (possibly empty) array of kerning adjustments

getKerning

public int getKerning(int l,
                      int r)

Obtain kerning adjustment for glyph pair {L,R}.

Parameters:

l - left member of glyph pair

r - right member of glyph pair

Returns:

a (possibly zero) kerning adjustment