/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.gce.imagemosaic.jdbc;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Logger;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.geometry.GeneralEnvelope;
/**
* This class reads decoded tiles from the queue and performs the mosaicing and
* scaling
*
* @author mcr
*
*/
class ImageComposerThread extends AbstractThread {
/** Logger. */
protected final static Logger LOGGER = Logger
.getLogger(ImageComposerThread.class.getPackage().getName());
protected GridCoverageFactory coverageFactory;
private GridCoverage2D gridCoverage2D;
private Color outputTransparentColor;
private boolean xAxisSwitch;
ImageComposerThread(Color outputTransparentColor, Rectangle pixelDimension,
GeneralEnvelope requestEnvelope, ImageLevelInfo levelInfo,
LinkedBlockingQueue<TileQueueElement> tileQueue, Config config,
boolean xAxisSwitch, GridCoverageFactory coverageFactory) {
super(pixelDimension, requestEnvelope, levelInfo, tileQueue, config);
this.outputTransparentColor = outputTransparentColor;
this.xAxisSwitch = xAxisSwitch;
this.coverageFactory = coverageFactory;
}
private Dimension getStartDimension() {
double width;
double height;
width = pixelDimension.getWidth() / rescaleX;
height = pixelDimension.getHeight() / rescaleY;
return new Dimension((int) Math.round(width), (int) Math.round(height));
}
private BufferedImage getStartImage(BufferedImage copyFrom) {
Dimension dim = getStartDimension();
int imageType = copyFrom.getType();
if (imageType == BufferedImage.TYPE_CUSTOM)
imageType = ImageMosaicJDBCReader.DEFAULT_IMAGE_TYPE;
BufferedImage image = null;
if ((imageType == BufferedImage.TYPE_BYTE_BINARY || imageType == BufferedImage.TYPE_BYTE_INDEXED)
&& (copyFrom.getColorModel() instanceof IndexColorModel))
image = new BufferedImage((int) dim.getWidth(), (int) dim
.getHeight(), imageType, (IndexColorModel) copyFrom
.getColorModel());
else
image = new BufferedImage((int) dim.getWidth(), (int) dim
.getHeight(), imageType);
Graphics2D g2D = (Graphics2D) image.getGraphics();
Color save = g2D.getColor();
g2D.setColor(outputTransparentColor);
g2D.fillRect(0, 0, image.getWidth(), image.getHeight());
g2D.setColor(save);
return image;
}
private BufferedImage getStartImage(int imageType) {
Dimension dim = getStartDimension();
if (imageType == BufferedImage.TYPE_CUSTOM)
imageType = ImageMosaicJDBCReader.DEFAULT_IMAGE_TYPE;
BufferedImage image = new BufferedImage((int) dim.getWidth(), (int) dim
.getHeight(), imageType);
Graphics2D g2D = (Graphics2D) image.getGraphics();
Color save = g2D.getColor();
g2D.setColor(outputTransparentColor);
g2D.fillRect(0, 0, image.getWidth(), image.getHeight());
g2D.setColor(save);
return image;
}
@Override
public void run() {
BufferedImage image = null;
Graphics2D g2D = null;
TileQueueElement queueObject = null;
try {
while ((queueObject = tileQueue.take()).isEndElement() == false) {
if (image == null) {
image = getStartImage(queueObject.getTileImage());
g2D = (Graphics2D) image.getGraphics();
}
int posx = (int) ((queueObject.getEnvelope().getMinimum(0) - requestEnvelope
.getMinimum(0)) / levelInfo.getResX());
int posy = (int) ((requestEnvelope.getMaximum(1) - queueObject
.getEnvelope().getMaximum(1)) / levelInfo.getResY());
g2D.drawImage(queueObject.getTileImage(), AffineTransform
.getTranslateInstance(posx, posy), null);
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
if (image == null) // no tiles ??
image = getStartImage(ImageMosaicJDBCReader.DEFAULT_IMAGE_TYPE);
GeneralEnvelope resultEnvelope = null;
if (xAxisSwitch) {
Rectangle2D tmp = new Rectangle2D.Double(requestEnvelope
.getMinimum(1), requestEnvelope.getMinimum(0),
requestEnvelope.getSpan(1), requestEnvelope.getSpan(0));
resultEnvelope = new GeneralEnvelope(tmp);
resultEnvelope.setCoordinateReferenceSystem(requestEnvelope
.getCoordinateReferenceSystem());
} else {
resultEnvelope = requestEnvelope;
}
gridCoverage2D = coverageFactory.create(config.getCoverageName(),
rescaleImage(image), resultEnvelope);
}
GridCoverage2D getGridCoverage2D() {
return gridCoverage2D;
}
}