Class TtfCMapTable

Parsed OpenType "cmap" table (character-to-glyph-index mapping). Reads all encoding records from the table directory and parses the unique subtables; exposes FindUnicodeTable() to select the best subtable for Unicode text shaping. Ref: OpenType spec §5.6.

Inheritance

object

TtfTableBase

TtfCMapTable

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 TtfCMapTable : TtfTableBase

Fields

TableTag

The table tag for the cmap table.

Declaration

public const string TableTag = "cmap"

Field Value

Type	Description
string

Properties

Subtables

All parsed CMap subtables.

Declaration

public IReadOnlyList<TtfCMapFormatBaseTable> Subtables { get; }

Property Value

Type	Description
IReadOnlyList<TtfCMapFormatBaseTable>

Methods

FindUnicodeTable()

Finds the best Unicode-capable subtable. Priority order:

1. Format 12, platform 0 or 3 (full Unicode coverage)
2. Format 12, any platform
3. Format 4, platform 3 (Windows BMP)
4. Format 4, platform 0 (Unicode BMP)
5. Format 4, any platform

Returns null if no usable Unicode subtable is found.

Declaration

public TtfCMapFormatBaseTable? FindUnicodeTable()

Returns

Type	Description
TtfCMapFormatBaseTable

Parse(byte[])

Parses the "cmap" table from its raw bytes.

Declaration

public static TtfCMapTable Parse(byte[] rawBytes)

Parameters

Type	Name	Description
byte[]	rawBytes

Returns

Type	Description
TtfCMapTable