Class MemoryTTFDataStream

java.lang.Object

org.ofdrw.converter.font.TTFDataStream

org.ofdrw.converter.font.MemoryTTFDataStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class MemoryTTFDataStream
extends TTFDataStream

An interface into a data stream.

Author:

Ben Litchfield

Constructor Summary

Constructors

Constructor	Description
MemoryTTFDataStream(byte[] data)	构造内存字体随机读取流
MemoryTTFDataStream(InputStream is)	Constructor from a stream.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the underlying resources.
long	getCurrentPosition()	Get the current position in the stream.
InputStream	getOriginalData()	This will get the original data file that was used for this stream.
long	getOriginalDataSize()	This will get the original data size that was used for this stream.
int	read()	Read an unsigned byte.
int	read(byte[] b, int off, int len)
long	readLong()	Read an unsigned byte.
int	readSignedInt()	Read a signed integer.
short	readSignedShort()	Read an signed short.
int	readUnsignedShort()	Read an unsigned short.
void	seek(long pos)	Seek into the datasource.

Methods inherited from class TTFDataStream

read, read32Fixed, readInternationalDate, readSignedByte, readString, readString, readString, readTag, readUnsignedByte, readUnsignedByteArray, readUnsignedInt, readUnsignedShortArray

Modifier and Type	Method	Description
byte[]	read(int numberOfBytes)	Read a specific number of bytes from the stream.
float	read32Fixed()	Read a 16.16 fixed value, where the first 16 bits are the decimal and the last 16 bits are the fraction.
Calendar	readInternationalDate()	Read an eight byte international date.
int	readSignedByte()	Read a signed byte.
String	readString(int length)	Read a fixed length ascii string.
String	readString(int length, String charset)	Read a fixed length string.
String	readString(int length, Charset charset)	Read a fixed length string.
String	readTag()	Reads a tag, an array of four uint8s used to identify a script, language system, feature, or baseline.
int	readUnsignedByte()	Read a unsigned byte.
int[]	readUnsignedByteArray(int length)	Read an unsigned byte array.
long	readUnsignedInt()	Read an unsigned integer.
int[]	readUnsignedShortArray(int length)	Read an unsigned short array.

Methods inherited from class Object

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

Constructor Details

MemoryTTFDataStream

public MemoryTTFDataStream(byte[] data)

构造内存字体随机读取流

Parameters:

data - 字体数据

MemoryTTFDataStream

public MemoryTTFDataStream(InputStream is)
                    throws IOException

Constructor from a stream.

Parameters:

is - The stream to read from. It will be closed by this method.

Throws:

IOException - If an error occurs while reading from the stream.

Method Details

readLong

public long readLong()
              throws IOException

Read an unsigned byte.

Specified by:

readLong in class TTFDataStream

Returns:

An unsigned byte.

Throws:

IOException - If there is an error reading the data.

readSignedInt

public int readSignedInt()
                  throws IOException

Read a signed integer.

Returns:

A signed integer.

Throws:

IOException - If there is a problem reading the file.

read

public int read()
         throws IOException

Read an unsigned byte.

Specified by:

read in class TTFDataStream

Returns:

An unsigned byte.

Throws:

IOException - If there is an error reading the data.

readUnsignedShort

public int readUnsignedShort()
                      throws IOException

Read an unsigned short.

Specified by:

readUnsignedShort in class TTFDataStream

Returns:

An unsigned short.

Throws:

IOException - If there is an error reading the data.

readSignedShort

public short readSignedShort()
                      throws IOException

Read an signed short.

Specified by:

readSignedShort in class TTFDataStream

Returns:

An signed short.

Throws:

IOException - If there is an error reading the data.

close

public void close()
           throws IOException

Close the underlying resources.

Throws:

IOException - If there is an error closing the resources.

seek

public void seek(long pos)
          throws IOException

Seek into the datasource.

Specified by:

seek in class TTFDataStream

Parameters:

pos - The position to seek to.

Throws:

IOException - If the seek position is negative or larger than MAXINT.

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Specified by:

read in class TTFDataStream

Parameters:

b - The buffer to write to.

off - The offset into the buffer.

len - The length into the buffer.

Returns:

The number of bytes read, or -1 at the end of the stream

Throws:

IOException - If there is an error reading from the stream.

See Also:

• InputStream.read(byte[], int, int)

getCurrentPosition

public long getCurrentPosition()
                        throws IOException

Get the current position in the stream.

Specified by:

getCurrentPosition in class TTFDataStream

Returns:

The current position in the stream.

Throws:

IOException - If an error occurs while reading the stream.

getOriginalData

public InputStream getOriginalData()
                            throws IOException

This will get the original data file that was used for this stream.

Specified by:

getOriginalData in class TTFDataStream

Returns:

The data that was read from.

Throws:

IOException - If there is an issue reading the data.

getOriginalDataSize

public long getOriginalDataSize()

This will get the original data size that was used for this stream.

Specified by:

getOriginalDataSize in class TTFDataStream

Returns:

The size of the original data.