/* 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.vfny.geoserver.wms.responses.map.png;
import java.awt.image.IndexColorModel;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.geoserver.wms.WMS;
import org.geotools.image.ImageWorker;
import org.vfny.geoserver.wms.WmsException;
import org.vfny.geoserver.wms.responses.DefaultRasterMapProducer;
/**
* Handles a GetMap request that spects a map in GIF format.
*
* @author Simone Giannecchini
* @author Didier Richard
* @version $Id
*/
public class PNGMapProducer extends DefaultRasterMapProducer {
/** Logger */
private static final Logger LOGGER = org.geotools.util.logging.Logging.getLogger(
"org.vfny.geoserver.wms.responses.map.png");
private static final String MIME_TYPE = "image/png";
private static final String[] OUTPUT_FORMATS = { MIME_TYPE, "image/png8" };
/** PNG Native Acceleration Mode * */
protected Boolean PNGNativeAcc;
/**
* @param format the format name as to be reported in the capabilities document
* @param wms
*/
public PNGMapProducer(WMS wms) {
super(MIME_TYPE, OUTPUT_FORMATS, wms);
this.PNGNativeAcc = wms.getPNGNativeAcceleration();
}
/**
* 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 WmsException
* not really.
* @throws IOException
* if encoding to <code>outStream</code> fails.
*/
public void formatImageOutputStream(RenderedImage image, OutputStream outStream)
throws WmsException, IOException {
// /////////////////////////////////////////////////////////////////
//
// Reformatting this image for png
//
// /////////////////////////////////////////////////////////////////
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Writing png image ...");
}
// get the one required by the GetMapRequest
final String format = getOutputFormat();
if (format.equalsIgnoreCase("image/png8") || (this.mapContext.getPaletteInverter() != null)) {
image = forceIndexed8Bitmask(image);
}
float quality = (100 - wms.getPngCompression()) / 100.0f;
new ImageWorker(image).writePNG(outStream, "FILTERED", quality, PNGNativeAcc.booleanValue(),
image.getColorModel() instanceof IndexColorModel);
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Writing png image ... done!");
}
}
public String getContentDisposition() {
// can be null
return null;
}
}