/*
* Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package ae.com.sun.imageio.plugins.jpeg;
import java.util.Locale;
import ae.javax.imageio.spi.ImageReaderSpi;
import ae.javax.imageio.stream.ImageInputStream;
import ae.javax.imageio.spi.IIORegistry;
import ae.javax.imageio.spi.ServiceRegistry;
import java.io.IOException;
import ae.javax.imageio.ImageReader;
import ae.javax.imageio.IIOException;
public class JPEGImageReaderSpi extends ImageReaderSpi {
private static String [] writerSpiNames =
{"com.sun.imageio.plugins.jpeg.JPEGImageWriterSpi"};
private boolean registered = false;
public JPEGImageReaderSpi() {
super(JPEG.vendor,
JPEG.version,
JPEG.names,
JPEG.suffixes,
JPEG.MIMETypes,
"com.sun.imageio.plugins.jpeg.JPEGImageReader",
STANDARD_INPUT_TYPE,
writerSpiNames,
true,
JPEG.nativeStreamMetadataFormatName,
JPEG.nativeStreamMetadataFormatClassName,
null, null,
true,
JPEG.nativeImageMetadataFormatName,
JPEG.nativeImageMetadataFormatClassName,
null, null
);
}
public void onRegistration(ServiceRegistry registry,
Class<?> category) {
if (registered) {
return;
}
try {
java.security.AccessController.doPrivileged(
new sun.security.action.LoadLibraryAction("jpeg"));
// Stuff it all into one lib for first pass
//java.security.AccessController.doPrivileged(
//new sun.security.action.LoadLibraryAction("imageioIJG"));
} catch (Throwable e) { // Fail on any Throwable
// if it can't be loaded, deregister and return
registry.deregisterServiceProvider(this);
return;
}
registered = true;
}
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);
}
}