/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.imageio.jpeg;
import java.io.IOException;
import java.util.Locale;
import javax.imageio.ImageReader;
import javax.imageio.spi.IIORegistry;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
public class JPEGImageReaderSpi extends ImageReaderSpi {
static final String vendorName = "JNode";
static final String version = "0.1";
static final String readerClassName = "org.jnode.imageio.jpeg.JPEGImageReader";
static final String[] names = {"JPEG"};
static final String[] suffixes = {".jpeg", ".jpg", ".jpe"};
static final String[] MIMETypes = {"image/jpeg"};
static final String[] writerSpiNames = {"org.jnode.imageio.jpeg.JPEGImageWriterSpi"};
static final boolean supportsStandardStreamMetadataFormat = false;
static final String nativeStreamMetadataFormatName = null;
static final String nativeStreamMetadataFormatClassName = null;
static final String[] extraStreamMetadataFormatNames = null;
static final String[] extraStreamMetadataFormatClassNames = null;
static final boolean supportsStandardImageMetadataFormat = false;
static final String nativeImageMetadataFormatName = null;
static final String nativeImageMetadataFormatClassName = null;
static final String[] extraImageMetadataFormatNames = null;
static final String[] extraImageMetadataFormatClassNames = null;
private static org.jnode.imageio.jpeg.JPEGImageReaderSpi readerSpi;
public JPEGImageReaderSpi() {
super(vendorName, version,
names, suffixes, MIMETypes,
readerClassName,
STANDARD_INPUT_TYPE,
writerSpiNames,
supportsStandardStreamMetadataFormat,
nativeStreamMetadataFormatName,
nativeStreamMetadataFormatClassName,
extraStreamMetadataFormatNames,
extraStreamMetadataFormatClassNames,
supportsStandardImageMetadataFormat,
nativeImageMetadataFormatName,
nativeImageMetadataFormatClassName,
extraImageMetadataFormatNames,
extraImageMetadataFormatClassNames);
}
public String getDescription(Locale locale) {
return "JPEG ISO 10918-1, JFIF V1.02";
}
public boolean canDecodeInput(Object input) throws IOException {
if (!(input instanceof ImageInputStream))
return false;
ImageInputStream in = (ImageInputStream) input;
boolean retval;
in.mark();
try {
//todo implement a less expensive canDecode()
new JPEGDecoderAdapter(in).decode();
retval = true;
} catch (JPEGException e) {
retval = false;
}
in.reset();
return retval;
}
public ImageReader createReaderInstance(Object extension) {
return new JPEGImageReader(this);
}
public static void registerSpis(IIORegistry reg) {
reg.registerServiceProvider(getReaderSpi(), ImageReaderSpi.class);
}
public static synchronized JPEGImageReaderSpi getReaderSpi() {
if (readerSpi == null)
readerSpi = new JPEGImageReaderSpi();
return readerSpi;
}
}