Package org.verapdf.pd.font.type1

Class Type1CharStringParser

java.lang.Object

org.verapdf.pd.font.type1.BaseCharStringParser

org.verapdf.pd.font.type1.Type1CharStringParser

public class Type1CharStringParser
extends BaseCharStringParser

This class parses charstring data in font Type 1 files after it was eexec-decoded. In particular, it extracts glyph width info.

Author:

Sergey Shemyakov

Field Summary

Fields inherited from class org.verapdf.pd.font.type1.BaseCharStringParser

bias, gBias, globalSubrs, localSubrs, stack, subrWidths

Constructor Summary

Constructors

Constructor	Description
Type1CharStringParser(ASInputStream decodedCharString)
Type1CharStringParser(ASInputStream decodedCharString, Map<Integer,CFFNumber> subrWidths)

Method Summary

Modifier and Type	Method	Description
protected boolean	processNextOperator(int firstByte)	This method processes charstring-encoded operators.
protected CFFNumber	readNextNumber(int firstByte)	This method reads next bytes from stream and interprets them as one number.

Methods inherited from class org.verapdf.pd.font.type1.BaseCharStringParser

addStream, getWidth, popStack, readStreams, setWidth

Methods inherited from class java.lang.Object

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

Constructor Details

Type1CharStringParser

public Type1CharStringParser(ASInputStream decodedCharString)
                      throws IOException

Throws:

IOException

Type1CharStringParser

public Type1CharStringParser(ASInputStream decodedCharString,
 Map<Integer,CFFNumber> subrWidths)
                      throws IOException

Throws:

IOException

Method Details

processNextOperator

protected boolean processNextOperator(int firstByte)
                               throws IOException

This method processes charstring-encoded operators. It should set width when it can be determined. Methods returns true if width is calculated.

Specified by:

processNextOperator in class BaseCharStringParser

Parameters:

firstByte - is first byte of operator. Note that this byte is already read.

Returns:

true if width was extracted from processed operator.

Throws:

IOException - if stream reading error occurs.

readNextNumber

protected CFFNumber readNextNumber(int firstByte)
                            throws IOException

This method reads next bytes from stream and interprets them as one number. In Type 1 CharStrings and Type 2 CharStrings this is done a little differently.

Specified by:

readNextNumber in class BaseCharStringParser

Returns:

number that was read.

Throws:

IOException - if stream reading error occurs.