/*

 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.imageio.plugins.gif;

import java.awt.image.ColorModel;

import java.awt.image.SampleModel;

import java.util.Locale;

import javax.imageio.ImageTypeSpecifier;

import javax.imageio.ImageWriter;

import javax.imageio.spi.ImageWriterSpi;

import javax.imageio.stream.ImageOutputStream;

import com.sun.imageio.plugins.common.PaletteBuilder;

public class GIFImageWriterSpi extends ImageWriterSpi {

    private static final String vendorName = "Oracle Corporation";

    private static final String version = "1.0";

    private static final String[] names = { "gif", "GIF" };

    private static final String[] suffixes = { "gif" };

    private static final String[] MIMETypes = { "image/gif" };

    private static final String writerClassName =

    "com.sun.imageio.plugins.gif.GIFImageWriter";

    private static final String[] readerSpiNames = {

        "com.sun.imageio.plugins.gif.GIFImageReaderSpi"

    };

    public GIFImageWriterSpi() {

        super(vendorName,

              version,

              names,

              suffixes,

              MIMETypes,

              writerClassName,

              new Class[] { ImageOutputStream.class },

              readerSpiNames,

              true,

              GIFWritableStreamMetadata.NATIVE_FORMAT_NAME,

              "com.sun.imageio.plugins.gif.GIFStreamMetadataFormat",

              null, null,

              true,

              GIFWritableImageMetadata.NATIVE_FORMAT_NAME,

              "com.sun.imageio.plugins.gif.GIFImageMetadataFormat",

              null, null

              );

    }

    public boolean canEncodeImage(ImageTypeSpecifier type) {

        if (type == null) {

            throw new IllegalArgumentException("type == null!");

        }

        SampleModel sm = type.getSampleModel();

        ColorModel cm = type.getColorModel();

        boolean canEncode = sm.getNumBands() == 1 &&

            sm.getSampleSize(0) <= 8 &&

            sm.getWidth() <= 65535 &&

            sm.getHeight() <= 65535 &&

            (cm == null || cm.getComponentSize()[0] <= 8);

        if (canEncode) {

            return true;

        } else {

            return PaletteBuilder.canCreatePalette(type);

        }

    }

    public String getDescription(Locale locale) {

        return "Standard GIF image writer";

    }

    public ImageWriter createWriterInstance(Object extension) {

        return new GIFImageWriter(this);

    }

}