Class TIFFPackBitsCompressor
- java.lang.Object
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- com.github.jaiimageio.plugins.tiff.TIFFCompressor
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- com.github.jaiimageio.impl.plugins.tiff.TIFFPackBitsCompressor
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public class TIFFPackBitsCompressor extends TIFFCompressor
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Field Summary
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Fields inherited from class com.github.jaiimageio.plugins.tiff.TIFFCompressor
compressionTagValue, compressionType, isCompressionLossless, metadata, stream, writer
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Constructor Summary
Constructors Constructor Description TIFFPackBitsCompressor()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description int
encode(byte[] b, int off, int width, int height, int[] bitsPerSample, int scanlineStride)
Encodes the supplied image data, writing to the currently setImageOutputStream
.private static int
packBits(byte[] input, int inOffset, int inCount, byte[] output, int outOffset)
Performs PackBits compression for a single buffer of data.-
Methods inherited from class com.github.jaiimageio.plugins.tiff.TIFFCompressor
dispose, getCompressionTagValue, getCompressionType, getMetadata, getStream, getWriter, isCompressionLossless, setMetadata, setStream, setWriter
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Method Detail
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packBits
private static int packBits(byte[] input, int inOffset, int inCount, byte[] output, int outOffset)
Performs PackBits compression for a single buffer of data. This should be called for each row of each tile. The returned value is the offset into the output buffer after compression.
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encode
public int encode(byte[] b, int off, int width, int height, int[] bitsPerSample, int scanlineStride) throws java.io.IOException
Description copied from class:TIFFCompressor
Encodes the supplied image data, writing to the currently setImageOutputStream
.- Specified by:
encode
in classTIFFCompressor
- Parameters:
b
- an array ofbyte
s containing the packed but uncompressed image data.off
- the starting offset of the data to be written in the arrayb
.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 ofint
s 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:
java.io.IOException
- if the supplied data cannot be encoded by thisTIFFCompressor
, or if any I/O error occurs during writing.
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