001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/graphics/displayelements/RasterDisplayElement.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2007 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.graphics.displayelements;
045
046 import java.awt.Graphics;
047 import java.awt.Graphics2D;
048 import java.awt.image.BufferedImage;
049 import java.io.Serializable;
050
051 import org.deegree.framework.log.ILogger;
052 import org.deegree.framework.log.LoggerFactory;
053 import org.deegree.graphics.sld.Categorize;
054 import org.deegree.graphics.sld.Interpolate;
055 import org.deegree.graphics.sld.RasterSymbolizer;
056 import org.deegree.graphics.transformation.GeoTransform;
057 import org.deegree.model.coverage.grid.GridCoverage;
058 import org.deegree.model.coverage.grid.ImageGridCoverage;
059 import org.deegree.processing.raster.converter.Image2RawData;
060 import org.opengis.pt.PT_Envelope;
061
062 /**
063 *
064 *
065 *
066 * @version $Revision: 7824 $
067 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
068 * @author last edited by: $Author: aschmitz $
069 *
070 * @version 1.0. $Revision: 7824 $, $Date: 2007-07-24 11:02:18 +0200 (Di, 24 Jul 2007) $
071 *
072 * @since 2.0
073 */
074 public class RasterDisplayElement extends AbstractDisplayElement implements Serializable {
075
076 private static final long serialVersionUID = -5195730721807600940L;
077
078 private static ILogger LOG = LoggerFactory.getLogger( RasterDisplayElement.class );
079
080 private RasterSymbolizer symbolizer = null;
081
082 private GridCoverage gc = null;
083
084 /**
085 * Creates a new RasterDisplayElement_Impl object.
086 *
087 * @param gc
088 * raster
089 */
090 RasterDisplayElement( GridCoverage gc ) {
091 setRaster( gc );
092 symbolizer = new RasterSymbolizer();
093 }
094
095 /**
096 * Creates a new RasterDisplayElement_Impl object.
097 *
098 * @param gc
099 * raster
100 * @param symbolizer
101 */
102 RasterDisplayElement( GridCoverage gc, RasterSymbolizer symbolizer ) {
103 setRaster( gc );
104 this.symbolizer = symbolizer;
105 }
106
107 private void paintCoverage( Graphics2D g, float[][] data, int minx, int miny, int maxx, int maxy ) {
108 Categorize categorize = symbolizer.getCategorize();
109 Interpolate interpolate = symbolizer.getInterpolate();
110
111 int opac = (int) ( 255 * symbolizer.getOpacity() ) << 24;
112
113 int width = maxx - minx;
114 int height = maxy - miny;
115
116 BufferedImage img = new BufferedImage( data[0].length, data.length, BufferedImage.TYPE_INT_ARGB );
117
118 for ( int x = 0; x < data[0].length; ++x ) {
119 for ( int y = 0; y < data.length; ++y ) {
120 float d = data[y][x];
121 int val = 0;
122
123 if ( categorize != null ) {
124 val = categorize.categorize( d, opac );
125 }
126 if ( interpolate != null ) {
127 val = interpolate.interpolate( d, opac );
128 }
129
130 img.setRGB( x, y, val );
131 }
132 }
133
134 g.drawImage( img, minx, miny, width, height, null );
135 }
136
137 /**
138 * renders the DisplayElement to the submitted graphic context
139 *
140 */
141 public void paint( Graphics g, GeoTransform projection, double scale ) {
142 try {
143 if ( doesScaleConstraintApply( scale ) ) {
144 PT_Envelope env = gc.getEnvelope();
145 int minx = (int) ( projection.getDestX( env.minCP.ord[0] ) - 0.5 );
146 int maxy = (int) ( projection.getDestY( env.minCP.ord[1] ) - 0.5 );
147 int maxx = (int) ( projection.getDestX( env.maxCP.ord[0] ) + 0.5 );
148 int miny = (int) ( projection.getDestY( env.maxCP.ord[1] ) + 0.5 );
149
150 if ( gc instanceof ImageGridCoverage ) {
151 ImageGridCoverage igc = (ImageGridCoverage) gc;
152 Graphics2D g2 = (Graphics2D) g;
153 BufferedImage image = igc.getAsImage( -1, -1 );
154
155 if ( symbolizer.isDefault() ) {
156 g2.drawImage( image, minx, miny, maxx - minx, maxy - miny, null );
157 } else {
158 if ( symbolizer.scaleValid( scale ) ) {
159 paintCoverage( g2, new Image2RawData( image ).parse(), minx, miny, maxx, maxy );
160 }
161 }
162 } else {
163 // TODO
164 // handle other grid coverages
165 }
166 }
167 } catch ( Exception e ) {
168 LOG.logError( e.getMessage(), e );
169 throw new RuntimeException( e.getMessage(), e );
170 }
171
172 }
173
174 /**
175 * returns the content of the <code>RasterDisplayElement</code>
176 *
177 * @return gird coverage
178 */
179 public GridCoverage getRaster() {
180 return gc;
181 }
182
183 /**
184 * sets the grid coverage that represents the content of the <code>RasterDisplayElement</code>
185 *
186 * @param gc
187 *
188 */
189 public void setRaster( GridCoverage gc ) {
190 this.gc = gc;
191 }
192
193 @Override
194 public boolean doesScaleConstraintApply( double scale ) {
195 return true;
196 }
197
198 }