org.extex.font.format.xtf.tables.cff
Class T2TDOCharStrings

java.lang.Object
  org.extex.font.format.xtf.tables.cff.T2CharString
      org.extex.font.format.xtf.tables.cff.T2Operator
          org.extex.font.format.xtf.tables.cff.T2TopDICTOperator
              org.extex.font.format.xtf.tables.cff.T2TDONumber
                  org.extex.font.format.xtf.tables.cff.T2TDOCharStrings

All Implemented Interfaces:

XMLWriterConvertible

public class T2TDOCharStrings
extends T2TDONumber

CharStrings.

CharStrings INDEX

This contains the charstrings of all the glyphs in a font stored in an INDEX structure. Charstring objects contained within this INDEX are accessed by GID. The first charstring (GID 0) must be the .notdef glyph. The number of glyphs available in a font may be determined from the count field in the INDEX. The format of the charstring data, and therefore the method of interpretation, is specified by the CharstringType operator in the Top DICT. The CharstringType operator has a default value of 2 indicating the Type 2 charstring format which was designed in conjunction with CFF. Type 1 charstrings are documented in the "Adobe Type 1 Font Format". Type 2 charstrings are described in Adobe Technical Note #5177: "Type 2 Charstring Format." Other charstring types may also be supported by this method.

Type 2

A Type 2 charstring program is a sequence of unsigned 8-bit bytes that encode numbers and operators. The byte value specifies a operator, a number, or subsequent bytes that are to be interpreted in a specific manner. The bytes are decoded into numbers and operators. One reason * the format is more economical than Type 1 is because the Type 2 charstring interpreter is required to count the number of arguments on the argument stack. It can thus detect additional sets of arguments for a single operator. The stack depth implementation limit is specified in Appendix B. A number, decoded from a charstring, is pushed onto the Type 2 argument stack. An operator expects its arguments in order from this argument stack with all arguments generally taken from the bottom of the stack (first argument bottom-most); however, some operators, particularly the subroutine operators, normally work from the top of the stack. If an operator returns results, they are pushed onto the Type 2 argument stack (last result topmost). In the following discussion, all numeric constants are decimal numbers, except where indicated.

Version:

$Revision: 6604 $

Author:

Michael Niedermair

Field Summary

Fields inherited from class org.extex.font.format.xtf.tables.cff.T2TopDICTOperator

CFF_CHARSET, CFF_CHARSTRINGS, CFF_CHARSTRINGTYPE, CFF_CIDCOUNT, CFF_CIDFONTREVISION, CFF_CIDFONTTYPE, CFF_CIDFONTVERSION, CFF_COPYRIGHT, CFF_ENCODING, CFF_FAMILYNAME, CFF_FDARRAY, CFF_FDSELECT, CFF_FONTBBOX, CFF_FONTMATRIX, CFF_FONTNAME, CFF_FULLNAME, CFF_ISFIXEDPITCH, CFF_ITALICANGLE, CFF_NOTICE, CFF_PAINTTYPE, CFF_POSTSCRIPT, CFF_PRIVATE, CFF_ROS, CFF_STROKEWIDTH, CFF_SYNTHETICBASE, CFF_UIDBASE, CFF_UNDERLINEPOSITION, CFF_UNDERLINETHICKNESS, CFF_UNIQUEID, CFF_VERSION, CFF_WEIGHT, CFF_XUID, TYPE_CHARSET, TYPE_CHARSTRINGS, TYPE_CHARSTRINGTYPE, TYPE_CIDCOUNT, TYPE_CIDFONTREVISION, TYPE_CIDFONTTYPE, TYPE_CIDFONTVERSION, TYPE_COPYRIGHT, TYPE_ENCODING, TYPE_FAMILYNAME, TYPE_FDARRAY, TYPE_FDSELECT, TYPE_FONTBBOX, TYPE_FONTMATRIX, TYPE_FONTNAME, TYPE_FULLNAME, TYPE_ISFIXEDPITCH, TYPE_ITALICANGLE, TYPE_NOTDEF, TYPE_NOTICE, TYPE_PAINTTYPE, TYPE_POSTSCRIPT, TYPE_PRIVATE, TYPE_ROS, TYPE_STROKEWIDTH, TYPE_SYNTHETICBASE, TYPE_UIDBASE, TYPE_UNDERLINEPOSITION, TYPE_UNDERLINETHICKNESS, TYPE_UNIQUEID, TYPE_VERSION, TYPE_WEIGHT, TYPE_XUID

Fields inherited from class org.extex.font.format.xtf.tables.cff.T2CharString

ESCAPE, ESCAPE_BYTE, T2CALLGSUBR, T2CALLSUBR, T2CNTRMASK, T2ENDCHAR, T2FLEX, T2FLEX1, T2HFLEX, T2HFLEX1, T2HHCURVETO, T2HINTMASK, T2HLINETO, T2HMOVETO, T2HSTEM, T2HSTEMHM, T2HVCURVETO, T2RCURVELINE, T2RETURN, T2RLINECURVE, T2RLINETO, T2RMOVETO, T2RRCURVETO, T2VHCURVETO, T2VLINETO, T2VMOVETO, T2VSTEM, T2VSTEMHM, T2VVCURVETO, TYPE_CALLGSUBR, TYPE_CALLSUBR, TYPE_CNTRMASK, TYPE_ENDCHAR, TYPE_FLEX, TYPE_FLEX1, TYPE_HFLEX, TYPE_HFLEX1, TYPE_HHCURVETO, TYPE_HINTMASK, TYPE_HLINETO, TYPE_HMOVETO, TYPE_HSTEM, TYPE_HSTEMHM, TYPE_HVCURVETO, TYPE_RCURVELINE, TYPE_RETURN, TYPE_RLINECURVE, TYPE_RLINETO, TYPE_RMOVETO, TYPE_RRCURVETO, TYPE_VHCURVETO, TYPE_VLINETO, TYPE_VMOVETO, TYPE_VSTEM, TYPE_VSTEMHM, TYPE_VVCURVETO

Constructor Summary

T2TDOCharStrings(java.util.List<T2CharString> stack)
Create a new object.

Method Summary

CharString	getCharString(int idx) Returns the charstring or null, if not found.
CharString	getCharString(java.lang.String name) Returns the charstring or null, if not found.
int	getID() Returns the id of the operator.
int	getInitPrio() Returns the priority for the init process.
java.lang.String	getName() Return the name of the operator.
void	init(RandomAccessR rar, OtfTableCFF cff, int baseoffset, CffFont cffFont) Initialize.
void	writeXML(XMLStreamWriter writer) Write the data to a XMLStreamWriter.

Methods inherited from class org.extex.font.format.xtf.tables.cff.T2TDONumber

getBytes, getDouble, getInteger, getValue, isDouble, isInteger, toString

Methods inherited from class org.extex.font.format.xtf.tables.cff.T2TopDICTOperator

isTopDICTOperator, newInstance

Methods inherited from class org.extex.font.format.xtf.tables.cff.T2Operator

checkWidth, convertStackaddID, isOperator, newInstance, toText

Methods inherited from class org.extex.font.format.xtf.tables.cff.T2CharString

isArray, isBoolean, isEscape, readNumber, readNumber, readSID, readTopDICTOperator

Methods inherited from class java.lang.Object

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

Constructor Detail

T2TDOCharStrings

public T2TDOCharStrings(java.util.List<T2CharString> stack)
                 throws java.io.IOException

Create a new object.

Parameters:

stack - the stack

Throws:

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

Method Detail

getCharString

public CharString getCharString(int idx)

Returns the charstring or null, if not found.

Parameters:

idx - the index.

Returns:

Returns the charstring.

getCharString

public CharString getCharString(java.lang.String name)

Returns the charstring or null, if not found.

Parameters:

name - The name of the charstring.

Returns:

Returns the charstring.

getID

public int getID()

Returns the id of the operator.

Specified by:

getID in class T2Operator

Returns:

Returns the id of the operator.

See Also:

T2Operator.getID()

getInitPrio

public int getInitPrio()

Returns the priority for the init process.

Overrides:

getInitPrio in class T2CharString

Returns:

Returns the priority.

See Also:

T2CharString.getInitPrio()

getName

public java.lang.String getName()

Return the name of the operator.

Specified by:

getName in class T2Operator

Returns:

Return the name of the operator.

See Also:

T2Operator.getName()

init

public void init(RandomAccessR rar,
                 OtfTableCFF cff,
                 int baseoffset,
                 CffFont cffFont)
          throws java.io.IOException

Initialize.

Overrides:

init in class T2Operator

Parameters:

rar - The input

cff - The cff table

baseoffset - The base offset from cff.

cffFont - The cff font.

Throws:

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

See Also:

T2Operator.init(org.extex.util.file.random.RandomAccessR, org.extex.font.format.xtf.tables.OtfTableCFF, int, org.extex.font.format.xtf.tables.cff.CffFont)

writeXML

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

Write the data to a XMLStreamWriter.

Specified by:

writeXML in interface XMLWriterConvertible

Overrides:

writeXML in class T2TDONumber

Parameters:

writer - the XML-Writer

Throws:

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

See Also:

T2TDONumber.writeXML(org.extex.util.xml.XMLStreamWriter)