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