javax.imageio.plugins.jpeg
Class JPEGImageReadParam
The JPEGImageReadParam class is only used to set JPEG decoding
tables for streams that do not provide their own tables. If a
stream does not provide tables and a custom JPEGImageReadParam is
not provided, then the standard JPEG tables are used from the
JPEGQTable and JPEGHuffmanTable classes. If a stream does provide
decoding tables then JPEGImageReadParam will be ignored.
JPEGImageReadParam cannot be used to retrieve the tables from a
stream. Instead, use IIOMetadata for this purpose.
A JPEGImageReadParam instance is retrieved from the built-in JPEG
ImageReader using the getDefaultImageReadParam method.
canSetSourceRenderSize, getDestination, getDestinationBands, getSourceMaxProgressivePass, getSourceMinProgressivePass, getSourceNumProgressivePasses, getSourceRenderSize, setDestination, setDestinationBands, setSourceProgressivePasses, setSourceRenderSize |
activateController, getController, getDefaultController, getDestinationOffset, getDestinationType, getSourceBands, getSourceRegion, getSourceXSubsampling, getSourceYSubsampling, getSubsamplingXOffset, getSubsamplingYOffset, hasController, setController, setDestinationOffset, setDestinationType, setSourceBands, setSourceRegion, setSourceSubsampling |
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
areTablesSet
public boolean areTablesSet()
Check if the decoding tables are set.
- true if the decoding tables are set, false otherwise
setDecodeTables
public void setDecodeTables(JPEGQTable[] qTables,
JPEGHuffmanTable[] DCHuffmanTables,
JPEGHuffmanTable[] ACHuffmanTables) Set the quantization and Huffman tables that will be used to
decode the stream. Copies are created of the array arguments.
The number of Huffman tables must be the same in both Huffman
table arrays. No argument may be null and no array may be longer
than four elements.
qTables - JPEG quantization tablesDCHuffmanTables - JPEG DC Huffman tablesACHuffmanTables - JPEG AC Huffman tables
IllegalArgumentException - if any argument is null, if any
of the arrays are longer than four elements, or if the Huffman
table arrays do not have the same number of elements
unsetDecodeTables
public void unsetDecodeTables()
Clear the quantization and Huffman decoding tables.
JPEGImageReadParam.java --
Copyright (C) 2006 Free Software Foundation, Inc.
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