com.ribs.pdf

Class LatinGlyphMapper

java.lang.Object

com.ribs.pdf.GlyphMapper

com.ribs.pdf.LatinGlyphMapper

public class LatinGlyphMapper
extends GlyphMapper

A LatinGlyphMapper is a concrete subclass of GlyphMapper that can handle the standard pdf encodings that map single byte character codes from a named encoding, with possible modifications by a Differences array.

This class uses the java.nio.charset package to handle macRoman and winAnsi base encodings.

It can also handle a null encoding, which it does by using the adobestandard mapping. Note that this is the right thing for the standard fonts, but not exactly correct all the time. In PDF, a null encoding actually specifies the font's internal (1 byte) encoding.

Constructor Summary

Constructors

Constructor and Description
LatinGlyphMapper(java.util.Map fontDict, PDFFile srcfile)

Method Summary

Modifier and Type	Method and Description
static boolean	canHandleEncoding(java.lang.String pdfEncodingName)
boolean	isMultiByte() Returns true if the encoding consumes more than single byte for a character.
int	mapBytesToChars(byte[] inbytes, int offset, int len, char[] outchars) The workhorse.
int	maximumOutputBufferSize(byte[] inbytes, int offset, int len) Quickly returns the maximum number of chars that could result from the conversion of inbytes bytes according to the encoding.

Methods inherited from class com.ribs.pdf.GlyphMapper

adobeGlyphNameToUnicode, createGlyphMapper, main, mapCharsToGIDs, setCIDToGIDMap, supportsCIDToGIDMapping

Methods inherited from class java.lang.Object

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

Constructor Detail

LatinGlyphMapper

public LatinGlyphMapper(java.util.Map fontDict,
                        PDFFile srcfile)

Method Detail

canHandleEncoding

public static boolean canHandleEncoding(java.lang.String pdfEncodingName)

isMultiByte

public boolean isMultiByte()

Description copied from class: GlyphMapper

Returns true if the encoding consumes more than single byte for a character. Note that encodings that sometimes maps single bytes, but other times maps more than one, should always return true for this routine.

Specified by:

isMultiByte in class GlyphMapper

maximumOutputBufferSize

public int maximumOutputBufferSize(byte[] inbytes,
                                   int offset,
                                   int len)

Description copied from class: GlyphMapper

Quickly returns the maximum number of chars that could result from the conversion of inbytes bytes according to the encoding. A single byte encoding, like the latin ones, will take a single byte and convert it into a single char, so this routine would just return len. An encoding that takes 2 bytes and converts them to a char would return len/2, etc.

Specified by:

maximumOutputBufferSize in class GlyphMapper

mapBytesToChars

public int mapBytesToChars(byte[] inbytes,
                           int offset,
                           int len,
                           char[] outchars)

Description copied from class: GlyphMapper

The workhorse. Take an input buffer and convert everything. The output buffer should be allocated using the size from the above routine. The actual number of chars in the final output is returned.

Specified by:

mapBytesToChars in class GlyphMapper