public class TIFFT4Compressor extends TIFFFaxCompressor
bits, BLACK, byteTable, horz, horzMode, inverseFill, makeupCodes, makeupCodesBlack, makeupCodesWhite, ndex, pass, passMode, termCodes, termCodesBlack, termCodesWhite, vert, vertMode, WHITEcompressionTagValue, compressionType, isCompressionLossless, metadata, stream, writer| Constructor and Description |
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TIFFT4Compressor() |
| Modifier and Type | Method and Description |
|---|---|
int |
encode(byte[] b,
int off,
int width,
int height,
int[] bitsPerSample,
int scanlineStride)
Encodes the supplied image data, writing to the currently set
ImageOutputStream. |
int |
encodeT4(boolean is1DMode,
boolean isEOLAligned,
byte[] data,
int lineStride,
int colOffset,
int width,
int height,
byte[] compData)
Encode a buffer of data using CCITT T.4 Compression also known as
Group 3 facsimile compression.
|
void |
setMetadata(IIOMetadata metadata)
Sets the value of the
metadata field. |
add1DBits, add2DBits, addEOFB, addEOL, encode1D, initBitBuf, nextStategetCompressionTagValue, getCompressionType, getMetadata, getStream, getWriter, isCompressionLossless, setStream, setWriterpublic void setMetadata(IIOMetadata metadata)
metadata field.
The implementation in this class also sets local options from the T4_OPTIONS field if it exists, and if it doesn't, adds it with default values.
setMetadata in class TIFFFaxCompressormetadata - the IIOMetadata object for the
image being written.TIFFCompressor.getMetadata()public int encodeT4(boolean is1DMode,
boolean isEOLAligned,
byte[] data,
int lineStride,
int colOffset,
int width,
int height,
byte[] compData)
is1DMode - Whether to perform one-dimensional encoding.isEOLAligned - Whether EOL bit sequences should be padded.data - The row of data to compress.lineStride - Byte step between the same sample in different rows.colOffset - Bit offset within first data[rowOffset].width - Number of bits in the row.height - Number of rows in the buffer.compData - The compressed data.public int encode(byte[] b,
int off,
int width,
int height,
int[] bitsPerSample,
int scanlineStride)
throws IOException
TIFFCompressorImageOutputStream.encode in class TIFFCompressorb - an array of bytes containing the packed
but uncompressed image data.off - the starting offset of the data to be written in the
array b.width - the width of the rectangle of pixels to be written.height - the height of the rectangle of pixels to be written.bitsPerSample - an array of ints indicting
the number of bits used to represent each image sample within
a pixel.scanlineStride - the number of bytes separating each
row of the input data.IOException - if the supplied data cannot be encoded by
this TIFFCompressor, or if any I/O error occurs
during writing.Copyright © 2015–2022 SCIFIO. All rights reserved.