com.ribs.pdf

Class GlyphMapper

java.lang.Object

com.ribs.pdf.GlyphMapper

Direct Known Subclasses:

IndentityGlyphMapper, LatinGlyphMapper

public abstract class GlyphMapper
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
GlyphMapper(java.util.Map fontDict, PDFFile srcfile) Creates a new mapper for the font.

Method Summary

Modifier and Type	Method and Description
static int	adobeGlyphNameToUnicode(java.lang.String name, java.util.Map fontDict) Maps a single glyph name string to a unicode value.
static boolean	canHandleEncoding(java.lang.String pdfEncodingName) Returns true if this subclass knows how to handle the given encoding
static GlyphMapper	createGlyphMapper(java.util.Map fontDict, PDFFile srcfile) Search routine to find a GlyphMapper subclass
abstract boolean	isMultiByte() Returns true if the encoding consumes more than single byte for a character.
static void	main(java.lang.String[] args)
abstract int	mapBytesToChars(byte[] inbytes, int offset, int len, char[] outchars) The workhorse.
int	mapCharsToGIDs(char[] cidbuffer, int numcids, int[] gidbuffer) Does the cid->gid mapping, if it knows how.
abstract 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.
void	setCIDToGIDMap(java.lang.Object mapobj) Sets the cid to glyph index map info.
boolean	supportsCIDToGIDMapping() Returns true if encoding knows how to convert to glyph indices.

Methods inherited from class java.lang.Object

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

Constructor Detail

GlyphMapper

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

Creates a new mapper for the font. For Latin fonts, the encodingDict is the dict pulled out of the pdf file (with /BaseFont & /Differences entries) more complex encoding dicts could contain cmaps or other info.

Method Detail

canHandleEncoding

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

Returns true if this subclass knows how to handle the given encoding

isMultiByte

public abstract boolean isMultiByte()

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.

maximumOutputBufferSize

public abstract 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. 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.

mapBytesToChars

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

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.

supportsCIDToGIDMapping

public boolean supportsCIDToGIDMapping()

Returns true if encoding knows how to convert to glyph indices.

setCIDToGIDMap

public void setCIDToGIDMap(java.lang.Object mapobj)

Sets the cid to glyph index map info. This object will will be interpreted as whatever format is appropriate for the particular glyphmapper.

mapCharsToGIDs

public int mapCharsToGIDs(char[] cidbuffer,
                          int numcids,
                          int[] gidbuffer)

Does the cid->gid mapping, if it knows how. Returns the total number of glyphs created.

createGlyphMapper

public static GlyphMapper createGlyphMapper(java.util.Map fontDict,
                                            PDFFile srcfile)

Search routine to find a GlyphMapper subclass

adobeGlyphNameToUnicode

public static int adobeGlyphNameToUnicode(java.lang.String name,
                                          java.util.Map fontDict)

Maps a single glyph name string to a unicode value. This is an implementation of the algorithm described in http://partners.adobe.com/public/developer/opentype/index_glyph.html

main

public static void main(java.lang.String[] args)