com.inductiveautomation.rm.pdf.reader

Class IndentityGlyphMapper

java.lang.Object

com.inductiveautomation.rm.pdf.reader.GlyphMapper

com.inductiveautomation.rm.pdf.reader.IndentityGlyphMapper

public class IndentityGlyphMapper
extends GlyphMapper

A concrete subclass of GlyphMapper for the Identity-H & Identity-V maps input bytes -> cids is done with no mapping, just interpreting the bytes as big-endian shorts. Also supports mapping to GIDs via an embedded CIDToGIDMap

Note that for fonts with CIDToGIDMaps, it might be tempting to provide a way to skip the CID step and just go from input bytes to GIDs. However, all the font metric info is based on CIDs, so we're always going to have to convert to CIDs no matter what.

Constructor Summary

Constructors

Constructor and Description
IndentityGlyphMapper(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 length, char[] outchars) The workhorse.
int	mapCharsToGIDs(char[] cidbuffer, int ncids, int[] gidbuffer) Does the cid->gid mapping, if it knows how.
int	maximumOutputBufferSize(byte[] inbytes, int offset, int length) 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) For CID fonts that know how to map their cids directly into glyph indices.
boolean	supportsCIDToGIDMapping() Returns true if encoding knows how to convert to glyph indices.

Methods inherited from class com.inductiveautomation.rm.pdf.reader.GlyphMapper

adobeGlyphNameToUnicode, createGlyphMapper, main

Methods inherited from class java.lang.Object

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

Constructor Detail

IndentityGlyphMapper

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

Method Detail

canHandleEncoding

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

setCIDToGIDMap

public void setCIDToGIDMap(java.lang.Object mapobj)

For CID fonts that know how to map their cids directly into glyph indices.

Overrides:

setCIDToGIDMap in class GlyphMapper

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 length)

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 length,
                           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

supportsCIDToGIDMapping

public boolean supportsCIDToGIDMapping()

Description copied from class: GlyphMapper

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

Overrides:

supportsCIDToGIDMapping in class GlyphMapper

mapCharsToGIDs

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

Description copied from class: GlyphMapper

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

Overrides:

mapCharsToGIDs in class GlyphMapper