001/*
002 * $RCSfile: PNMImageWriterSpi.java,v $
003 *
004 * 
005 * Copyright (c) 2005 Sun Microsystems, Inc. All  Rights Reserved.
006 * 
007 * Redistribution and use in source and binary forms, with or without
008 * modification, are permitted provided that the following conditions
009 * are met: 
010 * 
011 * - Redistribution of source code must retain the above copyright 
012 *   notice, this  list of conditions and the following disclaimer.
013 * 
014 * - Redistribution in binary form must reproduce the above copyright
015 *   notice, this list of conditions and the following disclaimer in 
016 *   the documentation and/or other materials provided with the
017 *   distribution.
018 * 
019 * Neither the name of Sun Microsystems, Inc. or the names of 
020 * contributors may be used to endorse or promote products derived 
021 * from this software without specific prior written permission.
022 * 
023 * This software is provided "AS IS," without a warranty of any 
024 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND 
025 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, 
026 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027 * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL 
028 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF 
029 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR 
031 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035 * POSSIBILITY OF SUCH DAMAGES. 
036 * 
037 * You acknowledge that this software is not designed or intended for 
038 * use in the design, construction, operation or maintenance of any 
039 * nuclear facility. 
040 *
041 * $Revision: 1.2 $
042 * $Date: 2006/03/31 19:43:40 $
043 * $State: Exp $
044 */
045package com.github.jaiimageio.impl.plugins.pnm;
046
047import java.awt.image.DataBuffer;
048import java.util.Locale;
049
050import javax.imageio.IIOException;
051import javax.imageio.ImageTypeSpecifier;
052import javax.imageio.ImageWriter;
053import javax.imageio.spi.ImageWriterSpi;
054import javax.imageio.spi.ServiceRegistry;
055
056import com.github.jaiimageio.impl.common.PackageUtil;
057
058public class PNMImageWriterSpi extends ImageWriterSpi {
059    private static String [] readerSpiNames =
060        {"com.github.jaiimageio.impl.plugins.pnm.PNMImageReaderSpi"};
061    private static String[] formatNames = {"pnm", "PNM"};
062    private static String[] entensions = {"pbm", "pgm", "ppm"};
063    private static String[] mimeType = {"image/x-portable-anymap",
064                                        "image/x-portable-bitmap",
065                                        "image/x-portable-graymap",
066                                        "image/x-portable-pixmap"};
067
068    private boolean registered = false;
069
070    public PNMImageWriterSpi() {
071        super(PackageUtil.getVendor(),
072              PackageUtil.getVersion(),
073              formatNames,
074              entensions,
075              mimeType,
076              "com.github.jaiimageio.impl.plugins.pnm.PNMImageWriter",
077              STANDARD_OUTPUT_TYPE,
078              readerSpiNames,
079              true,
080              null, null, null, null,
081              true,
082              null, null, null, null);
083    }
084
085    public String getDescription(Locale locale) {
086        String desc = PackageUtil.getSpecificationTitle() + 
087            " PNM Image Writer";
088        return desc;
089    }
090
091    public void onRegistration(ServiceRegistry registry,
092                               Class category) {
093        if (registered) {
094            return;
095        }
096
097        registered = true;
098    }
099
100    public boolean canEncodeImage(ImageTypeSpecifier type) {
101        int dataType = type.getSampleModel().getDataType();
102        if ((dataType < DataBuffer.TYPE_BYTE) ||
103            (dataType > DataBuffer.TYPE_INT))
104            return false;
105
106        int numBands = type.getSampleModel().getNumBands();
107        if (numBands != 1 && numBands != 3)
108            return false;
109
110        return true;
111    }
112
113    public ImageWriter createWriterInstance(Object extension)
114        throws IIOException {
115        return new PNMImageWriter(this);
116    }
117}