001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/model/coverage/grid/ByteGridCoverage.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.model.coverage.grid;
037
038 import java.awt.Rectangle;
039 import java.awt.image.BandedSampleModel;
040 import java.awt.image.BufferedImage;
041 import java.awt.image.DataBuffer;
042 import java.awt.image.DataBufferByte;
043 import java.awt.image.Raster;
044 import java.awt.image.SampleModel;
045 import java.awt.image.renderable.RenderableImage;
046
047 import org.deegree.model.spatialschema.Envelope;
048 import org.deegree.ogcwebservices.wcs.describecoverage.CoverageOffering;
049
050 /**
051 * GridCoverage implementation for holding grids stored in a raw byte matrix (byte[][]) or in a set of
052 * <tt>ByteGridCoverage</tt>s
053 *
054 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
055 * @author last edited by: $Author: mschneider $
056 *
057 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
058 */
059 public class ByteGridCoverage extends AbstractGridCoverage {
060
061 private static final long serialVersionUID = 5612511572056707069L;
062
063 private byte[][][] data = null;
064
065 /**
066 * @param coverageOffering
067 * @param envelope
068 * @param data
069 */
070 public ByteGridCoverage( CoverageOffering coverageOffering, Envelope envelope, byte[][][] data ) {
071 this( coverageOffering, envelope, false, data );
072 }
073
074 /**
075 * @param coverageOffering
076 * @param envelope
077 * @param isEditable
078 * @param data
079 */
080 public ByteGridCoverage( CoverageOffering coverageOffering, Envelope envelope, boolean isEditable, byte[][][] data ) {
081 super( coverageOffering, envelope, isEditable );
082 this.data = data;
083 }
084
085 /**
086 * @param coverageOffering
087 * @param envelope
088 * @param sources
089 */
090 public ByteGridCoverage( CoverageOffering coverageOffering, Envelope envelope, ByteGridCoverage[] sources ) {
091 super( coverageOffering, envelope, sources );
092 }
093
094 /**
095 * The number of sample dimensions in the coverage. For grid coverages, a sample dimension is a band.
096 *
097 * @return The number of sample dimensions in the coverage.
098 * @UML mandatory numSampleDimensions
099 */
100 public int getNumSampleDimensions() {
101 if ( data != null ) {
102 return data.length;
103 }
104 return sources[0].getNumSampleDimensions();
105 }
106
107 /**
108 * Returns 2D view of this coverage as a renderable image. This optional operation allows interoperability with <A
109 * HREF="http://java.sun.com/products/java-media/2D/">Java2D</A>. If this coverage is a
110 * {@link "org.opengis.coverage.grid.GridCoverage"} backed by a {@link java.awt.image.RenderedImage}, the underlying
111 * image can be obtained with:
112 *
113 * <code>getRenderableImage(0,1).{@linkplain RenderableImage#createDefaultRendering()
114 * createDefaultRendering()}</code>
115 *
116 * @param xAxis
117 * Dimension to use for the <var>x</var> axis.
118 * @param yAxis
119 * Dimension to use for the <var>y</var> axis.
120 * @return A 2D view of this coverage as a renderable image.
121 * @throws UnsupportedOperationException
122 * if this optional operation is not supported.
123 * @throws IndexOutOfBoundsException
124 * if <code>xAxis</code> or <code>yAxis</code> is out of bounds.
125 */
126 @Override
127 public RenderableImage getRenderableImage( int xAxis, int yAxis )
128 throws UnsupportedOperationException, IndexOutOfBoundsException {
129 if ( data != null ) {
130
131 return null;
132 }
133 // TODO if multi images -> sources.length > 0
134 return null;
135 }
136
137 /**
138 * this is a deegree convenience method which returns the source image of an <tt>ImageGridCoverage</tt>. In procipal
139 * the same can be done with the getRenderableImage(int xAxis, int yAxis) method. but creating a
140 * <tt>RenderableImage</tt> image is very slow. I xAxis or yAxis <= 0 then the size of the returned image will be
141 * calculated from the source images of the coverage.
142 *
143 * @param xAxis
144 * Dimension to use for the <var>x</var> axis.
145 * @param yAxis
146 * Dimension to use for the <var>y</var> axis.
147 * @return the source image of an <tt>ImageGridCoverage</tt>.
148 */
149 @Override
150 public BufferedImage getAsImage( int xAxis, int yAxis ) {
151
152 if ( xAxis <= 0 || yAxis <= 0 ) {
153 // get default size if passed target size is <= 0
154 Rectangle rect = calculateOriginalSize();
155 xAxis = rect.width;
156 yAxis = rect.height;
157 }
158 BufferedImage bi = createBufferedImage( xAxis, yAxis );
159 if ( data != null ) {
160 bi = createBufferedImage( data[0][0].length, data[0].length );
161 // total number of fields for one band; it is assumed that each
162 // band has the same number of fiels
163 int numOfFields = data[0].length * data[0][0].length;
164 byte[][] bb = new byte[data.length][];
165 for ( int z = 0; z < data.length; z++ ) {
166 bb[z] = new byte[numOfFields];
167 }
168 int c = 0;
169 for ( int i = 0; i < data[0].length; i++ ) {
170 for ( int j = 0; j < data[0][i].length; j++ ) {
171 for ( int z = 0; z < data.length; z++ ) {
172 bb[z][c] = data[z][i][j];
173 }
174 c++;
175 }
176 }
177 DataBuffer db = new DataBufferByte( bb, numOfFields );
178 SampleModel sm = new BandedSampleModel( DataBuffer.TYPE_BYTE, data[0][0].length, data[0].length,
179 data.length );
180 Raster raster = Raster.createWritableRaster( sm, db, null );
181 bi.setData( raster );
182 } else {
183 // it's a complex ByteGridCoverage made up of different
184 // source coverages
185 for ( int i = 0; i < sources.length; i++ ) {
186 BufferedImage sourceImg = ( (AbstractGridCoverage) sources[i] ).getAsImage( -1, -1 );
187 bi = paintImage( bi, getEnvelope(), sourceImg, sources[i].getEnvelope() );
188 }
189 }
190
191 return bi;
192 }
193
194 private BufferedImage createBufferedImage( int xAxis, int yAxis ) {
195 int sampleDim = getNumSampleDimensions();
196 switch ( sampleDim ) {
197 case 1:
198 return new BufferedImage( xAxis, yAxis, BufferedImage.TYPE_BYTE_GRAY );
199 case 3:
200 return new BufferedImage( xAxis, yAxis, BufferedImage.TYPE_INT_RGB );
201 default:
202 return new BufferedImage( xAxis, yAxis, BufferedImage.TYPE_INT_ARGB );
203 }
204 }
205
206 /**
207 * calculates the original size of a gridcoverage based on its resolution and the envelope(s) of its source(s).
208 *
209 * @return the size
210 */
211 private Rectangle calculateOriginalSize() {
212 if ( data != null ) {
213 return new Rectangle( data[0].length, data.length );
214 }
215 BufferedImage bi = ( (ImageGridCoverage) sources[0] ).getAsImage( -1, -1 );
216 Envelope env = sources[0].getEnvelope();
217 double dx = env.getWidth() / bi.getWidth();
218 double dy = env.getHeight() / bi.getHeight();
219 env = this.getEnvelope();
220 int w = (int) Math.round( env.getWidth() / dx );
221 int h = (int) Math.round( env.getHeight() / dy );
222 return new Rectangle( w, h );
223 }
224 }