org.apache.fop.complexscripts.fonts

Class GlyphDefinitionTable

java.lang.Object

org.apache.fop.complexscripts.fonts.GlyphTable

org.apache.fop.complexscripts.fonts.GlyphDefinitionTable

public class GlyphDefinitionTable
extends GlyphTable

The GlyphDefinitionTable class is a glyph table that implements glyph definition functionality according to the OpenType GDEF table.

This work was originally authored by Glenn Adams (gadams@apache.org).

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.fop.complexscripts.fonts.GlyphTable

GlyphTable.ChainedClassSequenceRule, GlyphTable.ChainedCoverageSequenceRule, GlyphTable.ChainedGlyphSequenceRule, GlyphTable.ClassSequenceRule, GlyphTable.CoverageSequenceRule, GlyphTable.GlyphSequenceRule, GlyphTable.HomogeneousRuleSet, GlyphTable.LookupSpec, GlyphTable.LookupTable, GlyphTable.Rule, GlyphTable.RuleLookup, GlyphTable.RuleSet, GlyphTable.UseSpec

Field Summary

Fields

Modifier and Type	Field and Description
static int	GDEF_LOOKUP_TYPE_ATTACHMENT_POINT attachment point subtable type
static int	GDEF_LOOKUP_TYPE_GLYPH_CLASS glyph class subtable type
static int	GDEF_LOOKUP_TYPE_LIGATURE_CARET ligature caret subtable type
static int	GDEF_LOOKUP_TYPE_MARK_ATTACHMENT mark attachment subtable type
static int	GLYPH_CLASS_BASE pre-defined glyph class - base glyph
static int	GLYPH_CLASS_COMPONENT pre-defined glyph class - component glyph
static int	GLYPH_CLASS_LIGATURE pre-defined glyph class - ligature glyph
static int	GLYPH_CLASS_MARK pre-defined glyph class - mark glyph

Fields inherited from class org.apache.fop.complexscripts.fonts.GlyphTable

GLYPH_TABLE_TYPE_BASELINE, GLYPH_TABLE_TYPE_DEFINITION, GLYPH_TABLE_TYPE_JUSTIFICATION, GLYPH_TABLE_TYPE_POSITIONING, GLYPH_TABLE_TYPE_SUBSTITUTION, processors

Constructor Summary

Constructors

Constructor and Description
GlyphDefinitionTable(List subtables, Map<String,ScriptProcessor> processors) Instantiate a GlyphDefinitionTable object using the specified subtables.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addSubtable(GlyphSubtable subtable) Add a subtable.
static GlyphSubtable	createSubtable(int type, String id, int sequence, int flags, int format, GlyphMappingTable mapping, List entries) Create a definition subtable according to the specified arguments.
int	getGlyphClass(int gid) Determine glyph class.
static int	getLookupTypeFromName(String name) Map a lookup type name to its constant (integer) value.
static String	getLookupTypeName(int type) Map a lookup type constant (integer) value to its name.
int	getMarkAttachClass(int gid) Determine mark attachment class.
boolean	isGlyphClass(int gid, int gc) Determine if glyph belongs to pre-defined glyph class.
boolean	isMarkAttachClass(int gid, int mac) Determine if glyph belongs to (font specific) mark attachment class.
GlyphSequence	reorderCombiningMarks(GlyphSequence gs, int[] widths, int[][] gpa, String script, String language) Reorder combining marks in glyph sequence so that they precede (within the sequence) the base character to which they are applied.

Methods inherited from class org.apache.fop.complexscripts.fonts.GlyphTable

assembleLookups, findLookupTables, freezeSubtables, getGlyphDefinitions, getLookups, getLookupTable, getLookupTables, getTableTypeFromName, hasFeature, matchLookups, matchLookupSpecs, resolveLookupReferences, toString

Methods inherited from class java.lang.Object

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

Field Detail

GDEF_LOOKUP_TYPE_GLYPH_CLASS

public static final int GDEF_LOOKUP_TYPE_GLYPH_CLASS

glyph class subtable type

See Also:

Constant Field Values

GDEF_LOOKUP_TYPE_ATTACHMENT_POINT

public static final int GDEF_LOOKUP_TYPE_ATTACHMENT_POINT

attachment point subtable type

See Also:

Constant Field Values

GDEF_LOOKUP_TYPE_LIGATURE_CARET

public static final int GDEF_LOOKUP_TYPE_LIGATURE_CARET

ligature caret subtable type

See Also:

Constant Field Values

GDEF_LOOKUP_TYPE_MARK_ATTACHMENT

public static final int GDEF_LOOKUP_TYPE_MARK_ATTACHMENT

mark attachment subtable type

See Also:

Constant Field Values

GLYPH_CLASS_BASE

public static final int GLYPH_CLASS_BASE

pre-defined glyph class - base glyph

See Also:

Constant Field Values

GLYPH_CLASS_LIGATURE

public static final int GLYPH_CLASS_LIGATURE

pre-defined glyph class - ligature glyph

See Also:

Constant Field Values

GLYPH_CLASS_MARK

public static final int GLYPH_CLASS_MARK

pre-defined glyph class - mark glyph

See Also:

Constant Field Values

GLYPH_CLASS_COMPONENT

public static final int GLYPH_CLASS_COMPONENT

pre-defined glyph class - component glyph

See Also:

Constant Field Values

Constructor Detail

GlyphDefinitionTable

public GlyphDefinitionTable(List subtables,
                    Map<String,ScriptProcessor> processors)

Instantiate a GlyphDefinitionTable object using the specified subtables.

Parameters:

subtables - a list of identified subtables

Method Detail

reorderCombiningMarks

public GlyphSequence reorderCombiningMarks(GlyphSequence gs,
                                  int[] widths,
                                  int[][] gpa,
                                  String script,
                                  String language)

Reorder combining marks in glyph sequence so that they precede (within the sequence) the base character to which they are applied. N.B. In the case of LTR segments, marks are not reordered by this, method since when the segment is reversed by BIDI processing, marks are automatically reordered to precede their base glyph.

Parameters:

gs - an input glyph sequence

widths - associated advance widths (also reordered)

gpa - associated glyph position adjustments (also reordered)

script - a script identifier

language - a language identifier

Returns:

the reordered (output) glyph sequence

addSubtable

protected void addSubtable(GlyphSubtable subtable)

Add a subtable.

Overrides:

addSubtable in class GlyphTable

Parameters:

subtable - a (non-null) glyph subtable

isGlyphClass

public boolean isGlyphClass(int gid,
                   int gc)

Determine if glyph belongs to pre-defined glyph class.

Parameters:

gid - a glyph identifier (index)

gc - a pre-defined glyph class (GLYPH_CLASS_BASE|GLYPH_CLASS_LIGATURE|GLYPH_CLASS_MARK|GLYPH_CLASS_COMPONENT).

Returns:

true if glyph belongs to specified glyph class

getGlyphClass

public int getGlyphClass(int gid)

Determine glyph class.

Parameters:

gid - a glyph identifier (index)

Returns:

a pre-defined glyph class (GLYPH_CLASS_BASE|GLYPH_CLASS_LIGATURE|GLYPH_CLASS_MARK|GLYPH_CLASS_COMPONENT).

isMarkAttachClass

public boolean isMarkAttachClass(int gid,
                        int mac)

Determine if glyph belongs to (font specific) mark attachment class.

Parameters:

gid - a glyph identifier (index)

mac - a (font specific) mark attachment class

Returns:

true if glyph belongs to specified mark attachment class

getMarkAttachClass

public int getMarkAttachClass(int gid)

Determine mark attachment class.

Parameters:

gid - a glyph identifier (index)

Returns:

a non-negative mark attachment class, or -1 if no class defined

getLookupTypeFromName

public static int getLookupTypeFromName(String name)

Map a lookup type name to its constant (integer) value.

Parameters:

name - lookup type name

Returns:

lookup type

getLookupTypeName

public static String getLookupTypeName(int type)

Map a lookup type constant (integer) value to its name.

Parameters:

type - lookup type

Returns:

lookup type name

createSubtable

public static GlyphSubtable createSubtable(int type,
                           String id,
                           int sequence,
                           int flags,
                           int format,
                           GlyphMappingTable mapping,
                           List entries)

Create a definition subtable according to the specified arguments.

Parameters:

type - subtable type

id - subtable identifier

sequence - subtable sequence

flags - subtable flags (must be zero)

format - subtable format

mapping - subtable mapping table

entries - subtable entries

Returns:

a glyph subtable instance