org.ajax4jsf.framework.util.image.imageio.gif.GIFImageWriter Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of ajax4jsf Show documentation

Ajax4jsf is an open source extension to the JavaServer Faces standard that adds AJAX capability to JSF applications without requiring the writing of any JavaScript.

The newest version!

/*
 * Helma License Notice
 *
 * The contents of this file are subject to the Helma License
 * Version 2.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://adele.helma.org/download/helma/license.txt
 *
 * Copyright 1998-2003 Helma Software. All Rights Reserved.
 *
 * $RCSfile: GIFImageWriter.java,v $
 * $Author: slava_kabanovich $
 * $Revision: 1.2 $
 * $Date: 2006/07/12 14:59:36 $
 */

/*
 * The imageio integration is inspired by the package org.freehep.graphicsio.gif
 */

package org.ajax4jsf.framework.util.image.imageio.gif;

import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.DataOutput;
import java.io.IOException;

import javax.imageio.IIOImage;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;

import org.ajax4jsf.framework.util.image.GIFEncoder;
import org.ajax4jsf.framework.util.message.Messages;


public class GIFImageWriter extends ImageWriter {
    GIFEncoder encoder;

    public GIFImageWriter(GIFImageWriterSpi originatingProvider) {
        super(originatingProvider);
        encoder = new GIFEncoder();
    }

    public void write(IIOMetadata streamMetadata, IIOImage image,
        ImageWriteParam param) throws IOException {
        if (image == null)
            throw new IllegalArgumentException("image == null");

        if (image.hasRaster())
            throw new UnsupportedOperationException(Messages.getMessage(Messages.CANNOT_WRITE_RASTERS));

        Object output = getOutput();
        if (output == null)
            throw new IllegalStateException(Messages.getMessage(Messages.NULL_OUTPUT_ERROR));

        if (param == null)
            param = getDefaultWriteParam();

        RenderedImage ri = image.getRenderedImage();
        if (!(ri instanceof BufferedImage))
            throw new IOException(Messages.getMessage(Messages.IMAGE_NOT_BUFFERED_ERROR));
        if (!(output instanceof DataOutput))
            throw new IOException(Messages.getMessage(Messages.NOT_DATA_OUTPUT_ERROR));
        encoder.encode((BufferedImage) ri, (DataOutput) output,
            param.getProgressiveMode() != ImageWriteParam.MODE_DISABLED, null);
    }

    public IIOMetadata convertStreamMetadata(IIOMetadata inData,
        ImageWriteParam param) {
        return null;
    }

    public IIOMetadata convertImageMetadata(IIOMetadata inData,
        ImageTypeSpecifier imageType, ImageWriteParam param) {
        return null;
    }

    public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
        ImageWriteParam param) {
        return null;
    }

    public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) {
        return null;
    }

    public ImageWriteParam getDefaultWriteParam() {
        return new GIFImageWriteParam(getLocale());
    }
}