CCITTFaxFilter

java.lang.Object

org.sejda.sambox.filter.Filter

org.sejda.sambox.filter.CCITTFaxFilter

final class CCITTFaxFilter extends Filter

Decodes image data that has been encoded using either Group 3 or Group 4 CCITT facsimile (fax) encoding, and encodes image data to Group 4.

Field Summary

Fields inherited from class org.sejda.sambox.filter.Filter
SYSPROP_DEFLATELEVEL
Constructor Summary

Constructors

Constructor

Description

CCITTFaxFilter()
Method Summary

Modifier and Type

Method

Description

DecodeResult

decode(InputStream encoded, OutputStream decoded, COSDictionary parameters, int index)

Decodes data, producing the original non-encoded data.

void

encode(InputStream input, OutputStream encoded, COSDictionary parameters)

Encodes data.

private static void

invertBitmap(byte[] bufferData)

(package private) static void

readFromDecoderStream(CCITTFaxDecoderStream decoderStream, byte[] result)

Methods inherited from class org.sejda.sambox.filter.Filter
findImageReader, getCompressionLevel, getDecodeParams

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- CCITTFaxFilter
  
  CCITTFaxFilter()
Method Details
- decode
  
  public DecodeResult decode(InputStream encoded, OutputStream decoded, COSDictionary parameters, int index) throws IOException
  
  Description copied from class: Filter
  
  Decodes data, producing the original non-encoded data.
  
  Specified by:
  
  decode in class Filter
  
  Parameters:
  
  encoded - the encoded byte stream
  
  decoded - the stream where decoded data will be written
  
  parameters - the parameters used for decoding
  
  index - the index to the filter being decoded
  
  Returns:
  
  repaired parameters dictionary, or the original parameters dictionary
  
  Throws:
  
  IOException - if the stream cannot be decoded
- readFromDecoderStream
  
  static void readFromDecoderStream(CCITTFaxDecoderStream decoderStream, byte[] result) throws IOException
  
  Throws:
  
  IOException
- invertBitmap
  
  private static void invertBitmap(byte[] bufferData)
- encode
  
  public void encode(InputStream input, OutputStream encoded, COSDictionary parameters) throws IOException
  
  Description copied from class: Filter
  
  Encodes data.
  
  Specified by:
  
  encode in class Filter
  
  Parameters:
  
  input - the byte stream to encode
  
  encoded - the stream where encoded data will be written
  
  parameters - the parameters used for encoding
  
  Throws:
  
  IOException - if the stream cannot be encoded