Class TtfGdefTable

Parsed OpenType "GDEF" table — Glyph Definition table. Exposes per-glyph classification (Base, Ligature, Mark, Component) via GetClass(ushort).

Inheritance

object

TtfTableBase

TtfGdefTable

Inherited Members

TtfTableBase.Tag

TtfTableBase.RawBytes

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: DRIT.Drawing.Font.Ttf.Tables

Assembly: DRIT.Drawing.dll

Syntax

public sealed class TtfGdefTable : TtfTableBase

Remarks

Supports GDEF versions 1.0, 1.2, and 1.3. Only the GlyphClassDef sub-table is parsed; AttachList, LigCaretList, MarkAttachClassDef, MarkGlyphSets and ItemVarStore are skipped.

ClassDef format 1 (contiguous range): stored as a flat array. ClassDef format 2 (range records): stored as a sorted array and binary-searched.

Ref: https://learn.microsoft.com/en-us/typography/opentype/spec/gdef

Fields

TableTag

The table tag for the GDEF table.

Declaration

public const string TableTag = "GDEF"

Field Value

Type	Description
string

Remarks

Supports GDEF versions 1.0, 1.2, and 1.3. Only the GlyphClassDef sub-table is parsed; AttachList, LigCaretList, MarkAttachClassDef, MarkGlyphSets and ItemVarStore are skipped.

ClassDef format 1 (contiguous range): stored as a flat array. ClassDef format 2 (range records): stored as a sorted array and binary-searched.

Ref: https://learn.microsoft.com/en-us/typography/opentype/spec/gdef

Methods

GetClass(ushort)

Returns the GlyphClass of glyphId. Returns Unclassified when the glyph is not listed.

Declaration

public GlyphClass GetClass(ushort glyphId)

Parameters

Type	Name	Description
ushort	glyphId

Returns

Type	Description
GlyphClass

Remarks

Supports GDEF versions 1.0, 1.2, and 1.3. Only the GlyphClassDef sub-table is parsed; AttachList, LigCaretList, MarkAttachClassDef, MarkGlyphSets and ItemVarStore are skipped.

ClassDef format 1 (contiguous range): stored as a flat array. ClassDef format 2 (range records): stored as a sorted array and binary-searched.

Ref: https://learn.microsoft.com/en-us/typography/opentype/spec/gdef

Parse(byte[])

Parses the "GDEF" table from its raw bytes.

Declaration

public static TtfGdefTable Parse(byte[] rawBytes)

Parameters

Type	Name	Description
byte[]	rawBytes

Returns

Type	Description
TtfGdefTable

Remarks

Supports GDEF versions 1.0, 1.2, and 1.3. Only the GlyphClassDef sub-table is parsed; AttachList, LigCaretList, MarkAttachClassDef, MarkGlyphSets and ItemVarStore are skipped.

ClassDef format 1 (contiguous range): stored as a flat array. ClassDef format 2 (range records): stored as a sorted array and binary-searched.

Ref: https://learn.microsoft.com/en-us/typography/opentype/spec/gdef