org.extex.font.format.xtf.tables
Class TtfTableCMAP.Format8

java.lang.Object
  org.extex.font.format.xtf.tables.TtfTableCMAP.Format
      org.extex.font.format.xtf.tables.TtfTableCMAP.Format8

All Implemented Interfaces:

XMLWriterConvertible

Enclosing class:

TtfTableCMAP

public class TtfTableCMAP.Format8
extends TtfTableCMAP.Format

Format 8.0 is a bit like format 2, in that it provides for mixed-length character codes. If a font contains Unicode surrogates, it's likely that it will also include other, regular 16-bit Unicodes as well. This requires a format to map a mixture of 16-bit and 32-bit character codes, just as format 2 allows a mixture of 8-bit and 16-bit codes. A simplifying assumption is made: namely, that there are no 32-bit character codes which share the same first 16 bits as any 16-bit character code. This means that the determination as to whether a particular 16-bit value is a standalone character code or the start of a 32-bit character code can be made by looking at the 16-bit value directly, with no further information required.

Type	Name	Description
Fixed32	format	Subtable format; set to 8.0
UInt32	length	Byte length of this subtable (including the header)
UInt32	language	Language code for this encoding subtable, or zero if language-independent
UInt8	is32[65536]	Tightly packed array of bits (8K bytes total) indicating whether the particular 16-bit (index) value is the start of a 32-bit character code

Method Summary

int	mapCharCode(int charCode) map char code.
void	writeXML(XMLStreamWriter writer) Write the data to a XMLStreamWriter.

Methods inherited from class org.extex.font.format.xtf.tables.TtfTableCMAP.Format

addAttributes, getFormat, getLength, getVersion, toString

Methods inherited from class java.lang.Object

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

Method Detail

mapCharCode

public int mapCharCode(int charCode)

map char code.

Specified by:

mapCharCode in class TtfTableCMAP.Format

Parameters:

charCode - the charcode

Returns:

Returns the map char code

See Also:

TtfTableCMAP.Format.mapCharCode(int)

writeXML

public void writeXML(XMLStreamWriter writer)
              throws java.io.IOException

Write the data to a XMLStreamWriter.

Parameters:

writer - the XML-Writer

Throws:

java.io.IOException - if an IO-error occurs.

See Also:

XMLWriterConvertible.writeXML( org.extex.util.xml.XMLStreamWriter)