| /* GIFImageReaderSpi.java -- |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.javax.imageio.gif; |
| |
| import gnu.javax.imageio.IIOInputStream; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.util.Locale; |
| import javax.imageio.ImageReader; |
| import javax.imageio.spi.ImageReaderSpi; |
| import javax.imageio.stream.ImageInputStream; |
| |
| public class GIFImageReaderSpi extends ImageReaderSpi |
| { |
| static final String vendorName = "GNU"; |
| static final String version = "0.1"; |
| static final String readerClassName = |
| "gnu.javax.imageio.gif.GIFImageReader"; |
| static final String[] names = { "Compuserve GIF" }; |
| static final String[] suffixes = { ".gif" }; |
| static final String[] MIMETypes = { |
| "image/gif", |
| "image/x-gif"}; // Not sure this is legal, but it seems to be used a bit |
| static final String[] writerSpiNames = null; |
| 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; |
| |
| public GIFImageReaderSpi() |
| { |
| super(vendorName, version, |
| names, suffixes, MIMETypes, |
| readerClassName, |
| new Class[]{ ImageInputStream.class, InputStream.class }, |
| writerSpiNames, |
| supportsStandardStreamMetadataFormat, |
| nativeStreamMetadataFormatName, |
| nativeStreamMetadataFormatClassName, |
| extraStreamMetadataFormatNames, |
| extraStreamMetadataFormatClassNames, |
| supportsStandardImageMetadataFormat, |
| nativeImageMetadataFormatName, |
| nativeImageMetadataFormatClassName, |
| extraImageMetadataFormatNames, |
| extraImageMetadataFormatClassNames); |
| } |
| |
| public String getDescription(Locale locale) |
| { |
| return "Compuserve GIF"; |
| } |
| |
| public boolean canDecodeInput(Object input) |
| throws IOException |
| { |
| if( input == null ) |
| throw new IllegalArgumentException("Input object cannot be null."); |
| |
| if( !(input instanceof ImageInputStream) && |
| !(input instanceof InputStream)) |
| return false; |
| |
| boolean retval; |
| InputStream in; |
| if( input instanceof ImageInputStream ) |
| in = new IIOInputStream( (ImageInputStream)input ); |
| else |
| in = (InputStream)input; |
| |
| in.mark(10); // we read 6 bytes |
| retval = GIFFile.readSignature( in ); |
| in.reset(); |
| |
| return retval; |
| } |
| |
| public ImageReader createReaderInstance(Object extension) |
| { |
| return new GIFImageReader(this); |
| } |
| } |