/*
* Copyright 2000-2005 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.png;
import java.io.IOException;
import java.util.Locale;
import java.util.Iterator;
import ae.javax.imageio.ImageReader;
import ae.javax.imageio.spi.ImageReaderSpi;
import ae.javax.imageio.metadata.IIOMetadataFormat;
import ae.javax.imageio.metadata.IIOMetadataFormatImpl;
import ae.javax.imageio.stream.ImageInputStream;
public class PNGImageReaderSpi extends ImageReaderSpi {
private static final String vendorName = "Sun Microsystems, Inc.";
private static final String version = "1.0";
private static final String[] names = { "png", "PNG" };
private static final String[] suffixes = { "png" };
private static final String[] MIMETypes = { "image/png", "image/x-png" };
private static final String readerClassName =
"com.sun.imageio.plugins.png.PNGImageReader";
private static final String[] writerSpiNames = {
"com.sun.imageio.plugins.png.PNGImageWriterSpi"
};
public PNGImageReaderSpi() {
super(vendorName,
version,
names,
suffixes,
MIMETypes,
readerClassName,
STANDARD_INPUT_TYPE,
writerSpiNames,
false,
null, null,
null, null,
true,
PNGMetadata.nativeMetadataFormatName,
"com.sun.imageio.plugins.png.PNGMetadataFormat",
null, null
);
}
public String getDescription(Locale locale) {
return "Standard PNG image reader";
}
public boolean canDecodeInput(Object input) throws IOException {
if (!(input instanceof ImageInputStream)) {
return false;
}
ImageInputStream stream = (ImageInputStream)input;
byte[] b = new byte[8];
stream.mark();
stream.readFully(b);
stream.reset();
return (b[0] == (byte)137 &&
b[1] == (byte)80 &&
b[2] == (byte)78 &&
b[3] == (byte)71 &&
b[4] == (byte)13 &&
b[5] == (byte)10 &&
b[6] == (byte)26 &&
b[7] == (byte)10);
}
public ImageReader createReaderInstance(Object extension) {
return new PNGImageReader(this);
}
}