org.jmol.export.image

Class GenericCRCEncoder

java.lang.Object

org.jmol.export.image.GenericCRCEncoder

Direct Known Subclasses:

GenericPngEncoder

 class GenericCRCEncoder
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bytePos
private java.util.zip.CRC32	crc
private int	dataLen
private byte[]	int2
private byte[]	int4
private byte[]	pngBytes
protected int	startPos

Constructor Summary

Constructors

Constructor and Description
GenericCRCEncoder()

Method Summary

Methods

Modifier and Type	Method and Description
protected byte[]	getBytes()
protected static void	getInt4(int n, byte[] int4)
protected void	setData(byte[] b, int pt)
protected void	writeByte(int b) Write a single byte into the pngBytes array at a given position.
protected void	writeBytes(byte[] data) Write an array of bytes into the pngBytes array.
protected void	writeCRC()
protected void	writeInt2(int n) Write a two-byte integer into the pngBytes array at a given position.
protected void	writeInt4(int n) Write a four-byte integer into the pngBytes array at a given position.
protected void	writeString(java.lang.String s) Write a string into the pngBytes array at a given position.

Methods inherited from class java.lang.Object

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

Field Detail

startPos

protected int startPos

bytePos

protected int bytePos

crc

private java.util.zip.CRC32 crc

pngBytes

private byte[] pngBytes

dataLen

private int dataLen

int2

private byte[] int2

int4

private byte[] int4

Constructor Detail

GenericCRCEncoder

GenericCRCEncoder()

Method Detail

setData

protected void setData(byte[] b,
           int pt)

getBytes

protected byte[] getBytes()

writeCRC

protected void writeCRC()

writeInt2

protected void writeInt2(int n)

Write a two-byte integer into the pngBytes array at a given position.

Parameters:

n - The integer to be written into pngBytes.

writeInt4

protected void writeInt4(int n)

Write a four-byte integer into the pngBytes array at a given position.

Parameters:

n - The integer to be written into pngBytes.

getInt4

protected static void getInt4(int n,
           byte[] int4)

writeByte

protected void writeByte(int b)

Write a single byte into the pngBytes array at a given position.

Parameters:

b - The byte to be written into pngBytes.

writeString

protected void writeString(java.lang.String s)

Write a string into the pngBytes array at a given position. This uses the getBytes method, so the encoding used will be its default.

Parameters:

s - The string to be written into pngBytes.

See Also:

String.getBytes()

writeBytes

protected void writeBytes(byte[] data)

Write an array of bytes into the pngBytes array. Both dataLen and bytePos are updated. If we don't have enough room, this is certainly in image data writing, so we add just enough for CRC END CRC

Parameters:

data - The data to be written into pngBytes.