Package com.itextpdf.text.pdf.codec
Class CCITTG4Encoder
- java.lang.Object
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- com.itextpdf.text.pdf.codec.CCITTG4Encoder
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public class CCITTG4Encoder extends java.lang.Object
Encodes data in the CCITT G4 FAX format.
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Field Summary
Fields Modifier and Type Field Description private int
bit
private static int
CODE
private int
data
private byte[]
dataBp
private static int
EOL
private static int
G3CODE_EOF
private static int
G3CODE_EOL
private static int
G3CODE_INCOMP
private static int
G3CODE_INVALID
private int[]
horizcode
private static int
LENGTH
private int[]
msbmask
private int
offsetData
private static byte[]
oneruns
private ByteBuffer
outBuf
private int[]
passcode
private byte[]
refline
private int
rowbytes
private int
rowpixels
private static int
RUNLEN
private int
sizeData
private int[][]
TIFFFaxBlackCodes
private int[][]
TIFFFaxWhiteCodes
private int[][]
vcodes
private static byte[]
zeroruns
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Constructor Summary
Constructors Constructor Description CCITTG4Encoder(int width)
Creates a new encoder.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
close()
Closes the encoder and returns the encoded data.static byte[]
compress(byte[] data, int width, int height)
Encodes a full image.private void
Fax3Encode2DRow()
void
fax4Encode(byte[] data, int height)
Encodes a number of lines.void
fax4Encode(byte[] data, int offset, int size)
Encodes a number of lines.private void
Fax4PostEncode()
private static int
find0span(byte[] bp, int offset, int bs, int be)
private static int
find1span(byte[] bp, int offset, int bs, int be)
private static int
finddiff(byte[] bp, int offset, int bs, int be, int color)
private static int
finddiff2(byte[] bp, int offset, int bs, int be, int color)
private int
pixel(byte[] data, int offset, int bit)
private void
putBits(int bits, int length)
private void
putcode(int[] table)
private void
putspan(int span, int[][] tab)
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Field Detail
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rowbytes
private int rowbytes
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rowpixels
private int rowpixels
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bit
private int bit
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data
private int data
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refline
private byte[] refline
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outBuf
private ByteBuffer outBuf
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dataBp
private byte[] dataBp
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offsetData
private int offsetData
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sizeData
private int sizeData
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zeroruns
private static byte[] zeroruns
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oneruns
private static byte[] oneruns
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LENGTH
private static final int LENGTH
- See Also:
- Constant Field Values
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CODE
private static final int CODE
- See Also:
- Constant Field Values
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RUNLEN
private static final int RUNLEN
- See Also:
- Constant Field Values
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EOL
private static final int EOL
- See Also:
- Constant Field Values
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G3CODE_EOL
private static final int G3CODE_EOL
- See Also:
- Constant Field Values
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G3CODE_INVALID
private static final int G3CODE_INVALID
- See Also:
- Constant Field Values
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G3CODE_EOF
private static final int G3CODE_EOF
- See Also:
- Constant Field Values
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G3CODE_INCOMP
private static final int G3CODE_INCOMP
- See Also:
- Constant Field Values
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TIFFFaxWhiteCodes
private int[][] TIFFFaxWhiteCodes
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TIFFFaxBlackCodes
private int[][] TIFFFaxBlackCodes
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horizcode
private int[] horizcode
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passcode
private int[] passcode
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vcodes
private int[][] vcodes
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msbmask
private int[] msbmask
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Method Detail
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fax4Encode
public void fax4Encode(byte[] data, int offset, int size)
Encodes a number of lines.- Parameters:
data
- the data to be encodedoffset
- the offset into the datasize
- the size of the data to be encoded
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compress
public static byte[] compress(byte[] data, int width, int height)
Encodes a full image.- Parameters:
data
- the data to encodewidth
- the image widthheight
- the image height- Returns:
- the encoded image
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fax4Encode
public void fax4Encode(byte[] data, int height)
Encodes a number of lines.- Parameters:
data
- the data to be encodedheight
- the number of lines to encode
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putcode
private void putcode(int[] table)
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putspan
private void putspan(int span, int[][] tab)
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putBits
private void putBits(int bits, int length)
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Fax3Encode2DRow
private void Fax3Encode2DRow()
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Fax4PostEncode
private void Fax4PostEncode()
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close
public byte[] close()
Closes the encoder and returns the encoded data.- Returns:
- the encoded data
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pixel
private int pixel(byte[] data, int offset, int bit)
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find1span
private static int find1span(byte[] bp, int offset, int bs, int be)
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find0span
private static int find0span(byte[] bp, int offset, int bs, int be)
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finddiff
private static int finddiff(byte[] bp, int offset, int bs, int be, int color)
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finddiff2
private static int finddiff2(byte[] bp, int offset, int bs, int be, int color)
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