Package com.sun.pdfview.font

Class Type1Font

java.lang.Object

com.sun.pdfview.font.PDFFont

com.sun.pdfview.font.OutlineFont

com.sun.pdfview.font.Type1Font

Direct Known Subclasses:

BuiltinFont

public class Type1Font
extends OutlineFont

A representation, with parser, of an Adobe Type 1 font.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) class	Type1Font.PSParser	PostScript reader (not a parser, as the name would seem to indicate).

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.awt.geom.AffineTransform	at
(package private) int	callcount
(package private) java.lang.String[]	chr2name
(package private) int	lenIV
(package private) java.util.Map<java.lang.String,java.lang.Object>	name2outline
(package private) java.util.Map<java.lang.String,FlPoint>	name2width
(package private) int	password
(package private) int	psLoc	the current position in the postscript stack
(package private) float[]	psStack	the stack of postscript commands (used by callothersubr)
(package private) int	sloc	the current position in the Type1 stack
(package private) float[]	stack	the Type1 stack of command values
(package private) byte[][]	subrs

Constructor Summary

Constructors

Constructor	Description
Type1Font(java.lang.String baseName, PDFObject src, PDFFontDescriptor descriptor)	create a new Type1Font based on a font data stream and an encoding.

Method Summary

Modifier and Type	Method	Description
private void	buildAccentChar(float x, float y, char a, char b, java.awt.geom.GeneralPath gp)	build an accented character out of two pre-defined glyphs.
private byte[]	decrypt(byte[] d, int start, int end, int key, int skip)	decrypt an array using the Adobe Type 1 Font decryption algorithm.
private int	findSlashName(byte[] d, java.lang.String name)	get the index into the byte array of a slashed name, like "/name".
protected java.awt.geom.GeneralPath	getOutline(char src, float width)	Get a glyph outline by character code Note this method must always return an outline
protected java.awt.geom.GeneralPath	getOutline(java.lang.String name, float width)	Get a glyph outline by name
float	getWidth(char code, java.lang.String name)	Get the width of a given character This method is overridden to work if the width array hasn't been populated (as for one of the 14 base fonts)
private boolean	isASCII(byte[] data, int start)	Determine if data is in ASCII or binary format.
private void	parse(byte[] cs, java.awt.geom.GeneralPath gp, FlPoint pt, FlPoint wid)	parse glyph data into a GeneralPath, and return the advance width.
protected void	parseFont(byte[] font, int start, int len)	Read a font from it's data, start position and length
private java.awt.geom.GeneralPath	parseGlyph(byte[] cs, FlPoint advance, java.awt.geom.AffineTransform at)	Decrypt a glyph stored in byte form
private float	pop()	pop the next item off the stack
private byte[][]	readArray(byte[] d, java.lang.String key, java.lang.String end)	read a named array out of the font definition.
private byte[]	readASCII(byte[] data, int start, int end)	Read data formatted as ASCII strings as binary data
private java.util.HashMap<java.lang.String,byte[]>	readChars(byte[] d)	get the character definitions of the font.
private java.lang.String[]	readEncoding(byte[] d)	parse the encoding portion of the font definition
private byte[][]	readSubrs(byte[] d)	read the subroutines out of the font definition

Methods inherited from class com.sun.pdfview.font.OutlineFont

getCharCount, getDefaultWidth, getFirstChar, getGlyph, getLastChar

Methods inherited from class com.sun.pdfview.font.PDFFont

equals, getBaseFont, getCachedGlyph, getDescriptor, getEncoding, getFont, getGlyphs, getSubtype, getUnicodeMap, hashCode, setBaseFont, setDescriptor, setEncoding, setSubtype, setUnicodeMap, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

chr2name

java.lang.String[] chr2name

password

int password

subrs

byte[][] subrs

lenIV

int lenIV

name2outline

java.util.Map<java.lang.String,java.lang.Object> name2outline

name2width

java.util.Map<java.lang.String,FlPoint> name2width

at

java.awt.geom.AffineTransform at

stack

float[] stack

the Type1 stack of command values

sloc

int sloc

the current position in the Type1 stack

psStack

float[] psStack

the stack of postscript commands (used by callothersubr)

psLoc

int psLoc

the current position in the postscript stack

callcount

int callcount

Constructor Detail

Type1Font

public Type1Font(java.lang.String baseName,
                 PDFObject src,
                 PDFFontDescriptor descriptor)
          throws java.io.IOException

create a new Type1Font based on a font data stream and an encoding.

Parameters:

baseName - the postscript name of this font

src - the Font object as a stream with a dictionary

descriptor - the descriptor for this font

Throws:

java.io.IOException

Method Detail

parseFont

protected void parseFont(byte[] font,
                         int start,
                         int len)

Read a font from it's data, start position and length

readEncoding

private java.lang.String[] readEncoding(byte[] d)

parse the encoding portion of the font definition

Parameters:

d - the font definition stream

Returns:

an array of the glyphs corresponding to each byte

readSubrs

private byte[][] readSubrs(byte[] d)

read the subroutines out of the font definition

Parameters:

d - the font definition stream

Returns:

an array of the subroutines, each as a byte array.

readArray

private byte[][] readArray(byte[] d,
                           java.lang.String key,
                           java.lang.String end)

read a named array out of the font definition.

this function attempts to parse an array out of a postscript definition without doing any postscript. It's actually looking for things that look like "dup id elt put", and placing the elt at the ith position in the array.

Parameters:

d - the font definition stream

key - the name of the array

end - a string that appears at the end of the array

Returns:

an array consisting of a byte array for each entry

decrypt

private byte[] decrypt(byte[] d,
                       int start,
                       int end,
                       int key,
                       int skip)

decrypt an array using the Adobe Type 1 Font decryption algorithm.

Parameters:

d - the input array of bytes

start - where in the array to start decoding

end - where in the array to stop decoding

key - the decryption key

skip - how many bytes to skip initially

Returns:

the decrypted bytes. The length of this array will be (start-end-skip) bytes long

readASCII

private byte[] readASCII(byte[] data,
                         int start,
                         int end)

Read data formatted as ASCII strings as binary data

Parameters:

data - the data, formatted as ASCII strings

start - where in the array to start decrypting

end - where in the array to stop decrypting

isASCII

private boolean isASCII(byte[] data,
                        int start)

Determine if data is in ASCII or binary format. According to the spec, if any of the first 4 bytes are not character codes ('0' - '9' or 'A' - 'F' or 'a' - 'f'), then the data is binary. Otherwise it is ASCII

findSlashName

private int findSlashName(byte[] d,
                          java.lang.String name)

get the index into the byte array of a slashed name, like "/name".

Parameters:

d - the search array

name - the name to look for, without the initial /

Returns:

the index of the first occurance of /name in the array.

readChars

private java.util.HashMap<java.lang.String,byte[]> readChars(byte[] d)

get the character definitions of the font.

Parameters:

d - the font data

Returns:

a HashMap that maps string glyph names to byte arrays of decoded font data.

pop

private float pop()

pop the next item off the stack

parse

private void parse(byte[] cs,
                   java.awt.geom.GeneralPath gp,
                   FlPoint pt,
                   FlPoint wid)

parse glyph data into a GeneralPath, and return the advance width. The working point is passed in as a parameter in order to allow recursion.

Parameters:

cs - the decrypted glyph data

gp - a GeneralPath into which the glyph shape will be stored

pt - a FlPoint object that will be used to generate the path

wid - a FlPoint into which the advance width will be placed.

buildAccentChar

private void buildAccentChar(float x,
                             float y,
                             char a,
                             char b,
                             java.awt.geom.GeneralPath gp)

build an accented character out of two pre-defined glyphs.

Parameters:

x - the x offset of the accent

y - the y offset of the accent

a - the index of the accent glyph

b - the index of the base glyph

gp - the GeneralPath into which the combined glyph will be written.

getWidth

public float getWidth(char code,
                      java.lang.String name)

Get the width of a given character This method is overridden to work if the width array hasn't been populated (as for one of the 14 base fonts)

Overrides:

getWidth in class OutlineFont

parseGlyph

private java.awt.geom.GeneralPath parseGlyph(byte[] cs,
                                             FlPoint advance,
                                             java.awt.geom.AffineTransform at)

Decrypt a glyph stored in byte form

getOutline

protected java.awt.geom.GeneralPath getOutline(java.lang.String name,
                                               float width)

Get a glyph outline by name

Specified by:

getOutline in class OutlineFont

Parameters:

name - the name of the desired glyph

Returns:

the glyph outline, or null if unavailable

getOutline

protected java.awt.geom.GeneralPath getOutline(char src,
                                               float width)

Get a glyph outline by character code Note this method must always return an outline

Specified by:

getOutline in class OutlineFont

Parameters:

src - the character code of the desired glyph

Returns:

the glyph outline