it.geosolutions.imageioimpl.plugins.tiff
Class TIFFT4Compressor
Object
TIFFCompressor
TIFFFaxCompressor
TIFFT4Compressor
- Direct Known Subclasses:
- TIFFCodecLibT4Compressor
public class TIFFT4Compressor
- extends TIFFFaxCompressor
| Fields inherited from class TIFFFaxCompressor |
bits, BLACK, byteTable, horz, horzMode, inverseFill, makeupCodes, makeupCodesBlack, makeupCodesWhite, ndex, pass, passMode, termCodes, termCodesBlack, termCodesWhite, vert, vertMode, WHITE |
|
Method Summary |
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. |
| Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TIFFT4Compressor
public TIFFT4Compressor()
setMetadata
public void setMetadata(IIOMetadata metadata)
- Sets the value of the
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.
- Overrides:
setMetadata in class TIFFFaxCompressor
- Parameters:
metadata - the IIOMetadata object for the
image being written.- See Also:
TIFFCompressor.getMetadata()
encodeT4
public 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.
- Parameters:
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.
- Returns:
- The number of bytes saved in the compressed data array.
encode
public int encode(byte[] b,
int off,
int width,
int height,
int[] bitsPerSample,
int scanlineStride)
throws IOException
- Description copied from class:
TIFFCompressor
- Encodes the supplied image data, writing to the currently set
ImageOutputStream.
- Specified by:
encode in class TIFFCompressor
- Parameters:
b - 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.
- Returns:
- the number of bytes written.
- Throws:
IOException - if the supplied data cannot be encoded by
this TIFFCompressor, or if any I/O error occurs
during writing.
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