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89 lines
2.1 KiB
89 lines
2.1 KiB
/*
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* Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*/
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package com.sun.imageio.plugins.jpeg;
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import java.util.Locale;
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import javax.imageio.spi.ImageReaderSpi;
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import javax.imageio.stream.ImageInputStream;
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import javax.imageio.spi.IIORegistry;
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import javax.imageio.spi.ServiceRegistry;
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import java.io.IOException;
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import javax.imageio.ImageReader;
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import javax.imageio.IIOException;
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public class JPEGImageReaderSpi extends ImageReaderSpi {
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private static String [] writerSpiNames =
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{"com.sun.imageio.plugins.jpeg.JPEGImageWriterSpi"};
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public JPEGImageReaderSpi() {
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super(JPEG.vendor,
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JPEG.version,
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JPEG.names,
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JPEG.suffixes,
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JPEG.MIMETypes,
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"com.sun.imageio.plugins.jpeg.JPEGImageReader",
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new Class[] { ImageInputStream.class },
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writerSpiNames,
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true,
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JPEG.nativeStreamMetadataFormatName,
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JPEG.nativeStreamMetadataFormatClassName,
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null, null,
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true,
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JPEG.nativeImageMetadataFormatName,
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JPEG.nativeImageMetadataFormatClassName,
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null, null
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);
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}
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public String getDescription(Locale locale) {
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return "Standard JPEG Image Reader";
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}
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public boolean canDecodeInput(Object source) throws IOException {
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if (!(source instanceof ImageInputStream)) {
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return false;
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}
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ImageInputStream iis = (ImageInputStream) source;
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iis.mark();
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// If the first two bytes are a JPEG SOI marker, it's probably
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// a JPEG file. If they aren't, it definitely isn't a JPEG file.
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int byte1 = iis.read();
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int byte2 = iis.read();
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iis.reset();
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if ((byte1 == 0xFF) && (byte2 == JPEG.SOI)) {
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return true;
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}
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return false;
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}
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public ImageReader createReaderInstance(Object extension)
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throws IIOException {
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return new JPEGImageReader(this);
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}
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}
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