/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.geoserver.wms.map;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.io.OutputStream;
import org.geoserver.platform.ServiceException;
import org.geoserver.wms.WMS;
import org.geoserver.wms.WMSMapContext;
import org.geotools.image.ImageWorker;
import org.geotools.image.palette.InverseColorMapOp;
/**
* Handles a GetMap request that spects a map in GIF format.
*
* @author Didier Richard
* @author Simone Giannecchini - GeoSolutions
* @version $Id
*/
public final class GIFMapResponse extends RenderedImageMapResponse {
/** the only MIME type this map producer supports */
static final String MIME_TYPE = "image/gif";
public GIFMapResponse(WMS wms) {
super(MIME_TYPE, wms);
}
/**
* Transforms the rendered image into the appropriate format, streaming to the output stream.
*
* @param image
* The image to be formatted.
* @param outStream
* The stream to write to.
*
* @throws ServiceException
* not really.
* @throws IOException
* if encoding to <code>outStream</code> fails.
*/
public void formatImageOutputStream(RenderedImage originalImage, OutputStream outStream,
WMSMapContext mapContext) throws ServiceException, IOException {
// /////////////////////////////////////////////////////////////////
//
// Now the magic
//
// /////////////////////////////////////////////////////////////////
InverseColorMapOp paletteInverter = mapContext.getPaletteInverter();
RenderedImage renderedImage = super.forceIndexed8Bitmask(originalImage, paletteInverter);
ImageWorker imageWorker = new ImageWorker(renderedImage);
imageWorker.writeGIF(outStream, "LZW", 0.75f);
}
}